Battery cell fixing device

Abstract

In a battery cell fixing device for fixing a battery cell 100 including a battery case 110 and an electrode assembly 120 accommodated inside the battery case 110, it is in contact with one side surface of the battery case 110 in a first direction and presses and fixes the battery cell 100 in the other direction of the first direction. However, among one side surfaces of the battery case 110 in the first direction, it is not in contact with one end portion (E1) or the other end portion (E2) in a second direction intersecting the first direction, and among one side surfaces of the battery case 110 in the first direction, it does not press and fix one end portion (E1) or the other end portion (E2) in the second direction in the other direction of the first direction. Provided is a battery cell fixing device including a first frame 210. Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressurization of the battery cell fixing device 200.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0075031, filed on June 20, 2022, and the contents disclosed in the documents of the Korean patent application are all included as part of this specification.

[0002] The present invention relates to a battery cell fixing device, and more particularly, to a battery cell fixing device that stably fixes a battery cell and prevents the occurrence of appearance defects in the battery case of the battery cell.

Background Art

[0003] Generally, a secondary battery, unlike a non-rechargeable primary battery, refers to a battery that can be charged and discharged, and these secondary batteries are used not only in small advanced electronic devices such as mobile phones, PDAs, and notebook computers, but also as a power source for an energy storage system (ESS), an electric vehicle (EV), or a hybrid electric vehicle (HEV).

[0004] Secondary batteries are classified into can-type batteries in which an electrode assembly is installed in a metal can and pouch-type batteries in which an electrode assembly is installed in a pouch (battery case). A pouch-type battery includes an electrode assembly and a pouch (battery case) that houses the electrode assembly.

[0005] On the other hand, when manufacturing a pouch-type battery (hereinafter, a battery cell), a battery cell fixing device is used to stably transfer the battery cell to the working areas of a plurality of processes, or to fix the battery cell in a plurality of processes to perform a predetermined operation, or to maintain the correct shape of the pouch (battery case) of the battery cell in a state where the electrode assembly is accommodated.

[0006] The battery cell fixing device can press and fix the battery cell. At this time, the pouch (battery case) of the battery cell may be pressed by the battery cell fixing device and deformed into an incorrect shape, and may not return to the original correct shape even after the pressing of the battery cell fixing device is interrupted. For this reason, appearance defects of the battery cell may occur. Therefore, there is a need for a battery cell fixing device that can stably fix the battery cell and prevent the occurrence of appearance defects in the battery case of the battery cell.

[0007] The prior art document related to this is Korean Patent Publication No. 10-2017-0122149.

Summary of the Invention

Problems to be Solved by the Invention

[0008] The present invention was devised to solve the above-described problems, and an object thereof is to provide a battery cell fixing device that can stably fix a battery cell and prevent the occurrence of appearance defects in the battery case of the battery cell.

[0009] The present invention aims to provide a battery cell fixing device that can prevent the occurrence of appearance defects in the battery case even when the thickness of the battery case increases.

[0010] The present invention aims to provide a battery cell fixing device that can prevent the occurrence of appearance defects in the battery case even when the width of the accommodation space of the electrode assembly in the battery case is larger than the width of the electrode assembly.

[0011] The present invention aims to provide a battery cell fixing device that has a simple configuration, can be easily manufactured at a low cost.

[0012] The present invention aims to provide a battery cell fixing device that protects the battery cell.

[0013] The technical problem of the present invention is not limited to the above-mentioned objectives. Other objectives and advantages of the present invention not mentioned can be understood from the following description and can be more clearly understood from the embodiments of the present invention. Also, it is easy to understand that the objectives and advantages of the present invention can be achieved by the means and their combinations shown in the claims.

Means for Solving the Problem

[0014] In order to solve the above-mentioned problems, the present invention provides a battery cell fixing device for fixing a battery cell 100 including a battery case 110 and an electrode assembly 120 accommodated inside the battery case 110, the battery cell fixing device including a first frame 210.

[0015] The first frame 210 is in contact with one side surface of the battery case 110 in the first direction and presses and fixes the battery cell 100 to the other side in the first direction. However, among one side surfaces of the battery case 110 in the first direction, it is not in contact with one end portion (E1) or the other end portion (E2) in the second direction intersecting the first direction, and does not press and fix one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the first direction to the other side in the first direction.

[0016] In one embodiment, the battery cell fixing device may include a second frame 220.

[0017] The second frame 220 may be disposed opposite to the first frame 210 through the battery cell 100.

[0018] The second frame 220 is in contact with the other side surface of the battery case 110 in the first direction, which is located on the other side in the first direction of one side surface of the battery case 110 in the first direction, and presses and fixes the battery cell 100 in one direction in the first direction. However, it is not in contact with one end portion (E3) or the other end portion (E4) in the second direction of the other side surface of the battery case 110 in the first direction, and it is not necessary to press and fix one end portion (E3) or the other end portion (E4) in the second direction of the other side surface of the battery case 110 in the first direction in one direction in the first direction.

[0019] In one embodiment, the other end in the second direction of the one end portion (E1) in the second direction that is not in contact with the first frame 210 of one side surface of the battery case 110 in the first direction and the other end in the second direction of the one end portion (E3) in the second direction that is not in contact with the second frame 220 of the other side surface of the battery case 110 in the first direction intersect the same virtual straight line (L1) extending in the first direction, or one end in the second direction of the other end portion (E2) in the second direction that is not in contact with the first frame 210 of one side surface of the battery case 110 in the first direction and one end in the second direction of the other end portion (E4) in the second direction that is not in contact with the second frame 220 of the other side surface of the battery case 110 in the first direction intersect the same virtual straight line (L2) extending in the first direction.

[0020] In one embodiment, the first frame 210 may include a first base portion 212 disposed on one side of the battery cell 100 in the first direction.

[0021] The first base portion 212 may include a first pressing surface (S1) and a first pressing prevention groove (H1).

[0022] The first pressing surface (S1) may be in contact with one side surface of the battery case 110 in the first direction.

[0023] The first pressure prevention groove (H1) is formed on one side or the other side in the second direction of the first pressure surface (S1), but is recessed in one direction of the first direction. Among the one side surfaces of the battery case 110 in the first direction, it may face the one end portion (E1) or the other end portion (E2) in the second direction in the first direction.

[0024] The first frame 210 presses and fixes the battery cell 100 to the other side in the first direction through the first pressure surface (S1). However, due to the first pressure prevention groove (H1), among the one side surfaces of the battery case 110 in the first direction, it does not contact the one end portion (E1) or the other end portion (E2) in the second direction, and it may not be necessary to press and fix the one end portion (E1) or the other end portion (E2) in the second direction of the one side surface of the battery case 110 in the first direction to the other side in the first direction.

[0025] The second frame 220 may include a second base portion 222 disposed on the other side of the battery cell 100 in the first direction.

[0026] The second base portion 222 may include a second pressure surface (S2) and a second pressure prevention groove (H2).

[0027] The second pressure surface (S2) may be in contact with the other side surface of the battery case 110 in the first direction.

[0028] The second pressure prevention groove (H2) is formed on one side or the other side in the second direction of the second pressure surface (S2), but is recessed in the other direction of the first direction. Among the other side surfaces of the battery case 110 in the first direction, it may face the one end portion (E3) or the other end portion (E4) in the second direction in the first direction.

[0029] The second frame 220 presses and fixes the battery cell 100 in one direction of the first direction through the second pressing surface (S2). However, the second pressing prevention groove (H2) does not contact the one-side end (E3) or the other-side end (E4) in the second direction of the other-side surface of the battery case 110 in the first direction. Among the other-side surfaces of the battery case 110 in the first direction, the one-side end (E3) or the other-side end (E4) in the second direction may not be pressed and fixed in one direction of the first direction.

[0030] In one embodiment, the first frame 210 does not contact the one-side end (E1) and the other-side end (E2) in the second direction of the one-side surface of the battery case 110 in the first direction. Among the one-side surfaces of the battery case 110 in the first direction, the one-side end (E1) and the other-side end (E2) in the second direction may not be pressed and fixed in the other direction of the first direction.

[0031] The first base portion 212 may include a pair of the first pressing prevention grooves (H1).

[0032] Although the pair of the first pressing prevention grooves (H1) are respectively formed on one side and the other side in the second direction of the first pressing surface (S1), they may be respectively recessed and formed in one direction of the first direction.

[0033] The pair of the first pressing prevention grooves (H1) may respectively face the one-side end (E1) and the other-side end (E2) in the second direction of the one-side surface of the battery case 110 in the first direction in the first direction.

[0034] The first frame 210 does not contact the one-side end (E1) and the other-side end (E2) in the second direction of the one-side surface of the battery case 110 in the first direction by the pair of the first pressing prevention grooves (H1). Among the one-side surfaces of the battery case 110 in the first direction, the one-side end (E1) and the other-side end (E2) in the second direction may not be pressed and fixed in the other direction of the first direction.

[0035] The second frame 220 does not contact the one-side end (E3) and the other-side end (E4) in the second direction among the other-side surfaces of the battery case 110 in the first direction, and it is not necessary to press and fix the one-side end (E3) and the other-side end (E4) in the second direction among the other-side surfaces of the battery case 110 to one side in the first direction.

[0036] The second base portion 222 may include the pair of second pressure prevention grooves (H2).

[0037] The pair of second pressure prevention grooves (H2) are respectively formed on one side and the other side in the second direction of the second pressure surface (S2), and may be respectively recessed in the other direction in the first direction.

[0038] The pair of second pressure prevention grooves (H2) may respectively face the one-side end (E3) and the other-side end (E4) in the second direction among the other-side surfaces of the battery case 110 in the first direction.

[0039] The second frame 220 does not contact the one-side end (E3) and the other-side end (E4) in the second direction among the other-side surfaces of the battery case 110 in the first direction, and it is not necessary to press and fix the one-side end (E3) and the other-side end (E4) in the second direction among the other-side surfaces of the battery case 110 to one side in the first direction.

[0040] In one embodiment, the first frame 210 may include a first base portion 212 disposed on one side of the battery cell 100 in the first direction.

[0041] The first base portion 212 may include a first pressure surface (S1) and a first pressure prevention groove (H1).

[0042] The first pressure surface (S1) may contact one side surface of the battery case 110 in the first direction.

[0043] The first pressure prevention groove (H1) may be formed on one side or the other side of the first pressure surface (S1) in the second direction, but may be recessed in one direction of the first direction.

[0044] The first pressure prevention groove (H1) may face the one end (E1) or the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction in the first direction.

[0045] The first frame 210 presses and fixes the battery cell 100 to the other side in the first direction through the first pressure surface (S1), but does not contact the one end (E1) or the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction due to the first pressure prevention groove (H1), and the one end (E1) or the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction may not be pressed and fixed to the other side in the first direction.

[0046] In one embodiment, the one side surface of the battery case 110 in the first direction may extend in a third direction intersecting the first direction and the second direction.

[0047] The first pressure surface (S1) and the first pressure prevention groove (H1) may extend in the third direction along the one side surface of the battery case 110 in the first direction.

[0048] In one embodiment, the first base portion 212 may include a third pressure prevention groove (H3).

[0049] The third pressure prevention groove (H3) may be formed on one side or the other side of the first pressure surface (S1) in a third direction intersecting the first direction and the second direction, but may be recessed in one direction of the first direction.

[0050] The third pressure prevention groove (H3) may face the one end or the other end in the third direction among the one side surfaces of the battery case 110 in the first direction in the first direction.

[0051] The first frame 210 presses and fixes the battery cell 100 in the other direction of the first direction via the first pressing surface (S1), but does not contact the one end or the other end in the third direction among the one side surfaces of the battery case 110 in the first direction by the third pressure prevention groove (H3), and it is not necessary to press and fix the one end or the other end in the third direction among the one side surfaces of the battery case 110 in the first direction in the other direction of the first direction.

[0052] In one embodiment, the first frame 210 does not contact the one end (E1) and the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction, and it is not necessary to press and fix the one end (E1) and the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction in the other direction of the first direction.

[0053] The first base portion 212 may include a pair of the first pressure prevention grooves (H1).

[0054] The pair of first pressure prevention grooves (H1) are respectively formed on one side and the other side in the second direction of the first pressing surface (S1), but may be respectively recessed in one direction of the first direction.

[0055] The pair of first pressure prevention grooves (H1) may respectively face the one end (E1) and the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction in the first direction.

[0056] The first frame 210 does not contact the one end (E1) and the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction by the pair of first pressure prevention grooves (H1), and it is not necessary to press and fix the one end (E1) and the other end (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction in the other direction of the first direction.

[0057] In one embodiment, the first frame 210 may include a first one-side support portion 214a and a first other-side support portion 214b.

[0058] The first one-side support part 214a may be disposed on one side in the second direction of the first pressure prevention groove (H1) formed on one side in the second direction of the first pressure surface (S1) among the pair of first pressure prevention grooves (H1).

[0059] The first one-side support part 214a may be coupled to the first base part 212.

[0060] The first one-side support part 214a may face or contact one side surface in the second direction of the battery cell 100 in the second direction.

[0061] The first other-side support part 214b may be disposed on the other side in the second direction of the first pressure prevention groove (H1) formed on the other side in the second direction of the first pressure surface (S1) among the pair of first pressure prevention grooves (H1).

[0062] The first other-side support part 214b may be coupled to the first base part 212.

[0063] The first other-side support part 214b may face or contact the other side surface in the second direction of the battery cell 100 in the second direction.

[0064] In one embodiment, the first frame 210 may include a first support part 214.

[0065] The first support part 214 may be disposed on one side in the second direction of the first pressure prevention groove (H1) formed on one side in the second direction of the first pressure surface (S1), or may be disposed on the other side in the second direction of the first pressure prevention groove (H1) formed on the other side in the second direction of the first pressure surface (S1).

[0066] The first support part 214 may be coupled to the first base part 212.

[0067] The first support part 214 may face or contact one side surface or the other side surface in the second direction of the battery cell 100 in the second direction.

[0068] In one embodiment, the battery case 110 may include a first case portion 110a and a second case portion 110b.

[0069] The first case portion 110a may extend in a second direction, a first direction, and a third direction intersecting the second direction.

[0070] The second case portion 110b may be disposed on one side of the first case portion 110a in the first direction.

[0071] The second case portion 110b may cover the first case portion 110a.

[0072] The electrode assembly 120 can be accommodated between the first case portion 110a and the second case portion 110b.

[0073] The first case portion 110a may include a first accommodating portion 112a and a first extending portion 114a.

[0074] The second case portion 110b may include a second accommodating portion 112b and a second extending portion 114b.

[0075] The first accommodating portion 112a and the second accommodating portion 112b may face each other or be in contact with each other to form an accommodating space (AS) for accommodating the electrode assembly 120 therein.

[0076] The first extending portion 114a and the second extending portion 114b extend outward from the first accommodating portion 112a and the second accommodating portion 112b, respectively, but may extend from the first accommodating portion 112a and the second accommodating portion 112b in at least one of the second direction.

[0077] The first extending portion 114a and the second extending portion 114b may at least partially surround the first accommodating portion 112a and the second accommodating portion 112b, respectively.

[0078] The first extending portion 114a and the second extending portion 114b can be joined to each other.

[0079] The second accommodating portion 112b may protrude in one direction of the first direction with respect to the second extending portion 114b.

[0080] The first pressing surface (S1) may be in contact with one side surface of the second accommodating portion 112b in the first direction.

[0081] The first pressure prevention groove (H1) may face in the first direction one of the one side end (E1) or the other side end (E2) in the second direction of one side surface of the second accommodating portion 112b.

[0082] The first frame 210 presses and fixes the second accommodating portion 112b of the battery cell 100 to the other side in the first direction via the first pressing surface (S1), but does not contact the one side end (E1) or the other side end (E2) in the second direction of one side surface of the second accommodating portion 112b due to the first pressure prevention groove (H1), and the one side end (E1) or the other side end (E2) in the second direction of one side surface of the second accommodating portion 112b may not be pressed and fixed to the other side in the first direction.

[0083] The first support portion 214 may face or be in contact with one side surface or the other side surface of the second accommodating portion 112b in the second direction.

[0084] The first support portion 214 may be in contact with one side surface of the second extending portion 114b in the first direction.

[0085] The first frame 210 can press and fix the second extending portion 114b of the battery cell 100 to the other side in the first direction via the first support portion 214.

[0086] In one embodiment, the battery case 110 may include a first case portion 110a and a second case portion 110b.

[0087] The first case portion 110a may extend in the second direction, the first direction, and a third direction intersecting the second and first directions.

[0088] The second case portion 110b may be disposed on one side of the first case portion 110a in the first direction and cover the first case portion 110a.

[0089] The electrode assembly 120 can be accommodated between the first case portion 110a and the second case portion 110b.

[0090] The first case portion 110a and the second case portion 110b may each include a first accommodation portion 112a and a second accommodation portion 112b.

[0091] The first accommodation portion 112a and the second accommodation portion 112b may face each other or be in contact with each other to form an accommodation space (AS) for accommodating the electrode assembly 120 therein.

[0092] The width (W1) of the accommodation space (AS) in the second direction may be larger than the width (W2) of the electrode assembly 120 in the second direction.

[0093] As a result, at least a part of one side end (E1) or the other side end (E2) in the second direction of one side surface of the second accommodation portion 112b in the first direction may not be supported in the first direction by the electrode assembly 120.

[0094] The first frame 210 is in contact with one side surface of the second accommodation portion 112b in the first direction and presses and fixes the battery cell 100 to the other side in the first direction. However, the first frame 210 is not in contact with one side end (E1) or the other side end (E2) in the second direction of one side surface of the second accommodation portion 112b in the first direction, and it is not necessary to press and fix one side end (E1) or the other side end (E2) in the second direction of one side surface of the second accommodation portion 112b in the first direction to the other side in the first direction.

[0095] In one embodiment, one side end or the other side end of the second case portion 110b in the second direction may be connected to one side end or the other side end of the first case portion 110a in the second direction.

[0096] For the second case portion 110b, other parts except one side end or the other side end in the second direction are separable from the first case portion 110a.

[0097] The second case portion 110b may be bent relative to the first case portion 110a to face the first case portion 110a in the first direction and cover the first case portion 110a.

[0098] The second accommodating portion 112b may have a concave shape to accommodate at least a part of the electrode assembly 120.

[0099] Thereby, a predetermined space (PS2) that forms at least a part of the accommodating space (AS) can be defined.

[0100] When the second case portion 110b is bent relative to the first case portion 110a with the electrode assembly 120 disposed in the first accommodating portion 112a, so that the second accommodating portion 112b does not interfere with the electrode assembly 120, the width (W1') in the second direction of the predetermined space (PS2) in the accommodating space (AS) may be larger than the width (W2) in the second direction of the electrode assembly 120.

[0101] Thereby, at least a part of one side end (E1) or the other side end (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction may not be supported in the first direction by the electrode assembly 120.

[0102] In one embodiment, among one side surfaces of the battery case 110 in the first direction, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction that is not in contact with the first frame 210 may be greater than or the same as 1 / 40 of the length in the second direction of one side surface of the battery case 110 in the first direction, and may also be less than or the same as 1 / 5.

Effect of the Invention

[0103] According to an embodiment of the present invention, in a battery cell fixing device for fixing a battery cell 100 including a battery case 110 and an electrode assembly 120 housed inside the battery case 110, the battery cell fixing device is in contact with one side surface of the battery case 110 in the first direction and presses and fixes the battery cell 100 in the other direction in the first direction. However, among one side surfaces of the battery case 110 in the first direction, it is not in contact with one end portion (E1) or the other end portion (E2) in the second direction intersecting the first direction, and may include a first frame 210 that does not press and fix one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the other direction in the first direction.

[0104] Thereby, the first frame 210 presses the central portion in the second direction between the one end portion (E1) and the other end portion (E2) in the second direction of one side surface of the battery case 110 in the other direction in the first direction, so that the battery cell 100 can be stably fixed. For this reason, i) the battery cell 100 can be stably transferred to the working area of one or more processes, ii) in one or more processes, the battery cell 100 can be smoothly subjected to a predetermined operation in a stably fixed state, and iii) the correct shape of the battery case 110 can be stably maintained in a state where the electrode assembly 120 is housed inside the battery case 110.

[0105] In addition, since the first frame 210 does not press one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the first direction, although the corner portion on one side or the other side in the second direction of the battery case 110 is pressed by the first frame 210 and deformed into an incorrect shape, after the pressing is interrupted, it is possible to prevent the battery case 110 from being deformed and restored to its original correct shape with difficulty. In particular, when the corner portion of the battery case 110 is pressed by the battery cell fixing device 200, although the battery case 110 is deformed into an incorrect shape due to design tolerances, assembly tolerances, alignment errors, etc. of the battery cell 100 or the battery cell fixing device 200, since the battery case 110 can be deformed and restored with difficulty, it is preferable not to press the corner portion of the battery case 110 against the battery cell fixing device 200.

[0106] Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200. For this reason, the defective rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0107] In addition, since the first frame 210 does not press one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the first direction, even if the thickness of the battery case 110 increases, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200. For this reason, the occurrence of appearance defects can be prevented, and the durability of the battery case 110 can be improved.

[0108] According to an embodiment of the present invention, the battery cell fixing device is disposed facing the first frame 210 via the battery cell 100, and contacts the other side surface of the battery case 110 in the first direction located on the other side in the first direction of one side surface of the battery case 110 in the first direction, and presses and fixes the battery cell 100 in one direction in the first direction. However, the battery cell fixing device does not contact one end portion (E3) or the other end portion (E4) in the second direction of the other side surface of the battery case 110 in the first direction, and does not press and fix one end portion (E3) or the other end portion (E4) in the second direction of the other side surface of the battery case 110 in the first direction in one direction in the first direction, and may include a second frame 220.

[0109] In this way, the first frame 210 and the second frame 220 can stably fix the battery cell 100 because they press the central portion in the second direction between one side end portions (E1, E3) and the other side end portions (E2, E4) in the second direction of one side surface and the other side surface of the battery case 110 toward the other and one sides in the first direction.

[0110] Also, since the first frame 210 and the second frame 220 do not press one side end portion (E1, E3) or the other side end portion (E2, E4) in the second direction of one side surface and the other side surface of the battery case 110 toward the other and / or one sides in the first direction, although the corner portion on one side or the other side in the second direction of the battery case 110 is pressed by the first frame 210 and the second frame and deformed into an incorrect shape, after the pressure is interrupted, it is possible to prevent the battery case 110 from being deformed and hardly restored to the original correct shape.

[0111] Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressure applied by the battery cell fixing device 200. For this reason, the defect rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0112] In particular, even when one of the first frame 210 and the second frame 220 is fixed and the fixed frame is relatively pressed against the battery cell 100 by the pressure applied to the other frame, the fixed first frame 210 or second frame 220 does not press the corner portion on one side or the other side in the second direction of the battery case 110, so it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressure applied by the battery cell fixing device 200.

[0113] Also, since the first frame 210 and the second frame 220 do not press one side end portion (E1, E3) or the other side end portion (E2, E4) in the second direction of one side surface and the other side surface of the battery case 110 toward the other and / or one sides in the first direction, even when the thickness of the battery case 110 increases, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressure applied by the battery cell fixing device 200. For this reason, the occurrence of appearance defects can be prevented, and the durability of the battery case 110 can be improved.

[0114] According to an embodiment of the present invention, among one side surface of the battery case 110 in the first direction, the other end in the second direction of one end portion (E1) in the second direction that is not in contact with the first frame 210 and among the other side surface of the battery case 110 in the first direction, the other end in the second direction of one end portion (E3) in the second direction that is not in contact with the second frame 220 intersect the same virtual straight line (L1) extending in the first direction, or among one side surface of the battery case 110 in the first direction, one end in the second direction of the other end portion (E2) in the second direction that is not in contact with the first frame 210 and among the other side surface of the battery case 110 in the first direction, one end in the second direction of the other end portion (E4) in the second direction that is not in contact with the second frame 220 intersect the same virtual straight line (L2) extending in the first direction.

[0115] Thereby, the boundary points where the first frame 210 and the second frame 220 press the one side surface and the other side surface of the battery case 110 in the first direction to the other and one in the first direction may correspond to each other. Therefore, since the regions where the battery cell fixing device 200 can press the one side surface and the other side surface of the battery case 110 correspond to each other, the battery cell fixing device 200 can stably fix the battery cell 100.

[0116] According to an embodiment of the present invention, the first frame 210 may include a first base portion 212 disposed on one side of the battery cell 100 in the first direction. The first base portion 212 has a first pressing surface (S1) that contacts one side surface of the battery case 110 in the first direction and is formed on one side or the other side of the first pressing surface (S1) in the second direction, but is recessed in one direction of the first direction, and includes a first pressing prevention groove (H1) facing one side end portion (E1) or the other side end portion (E2) in the second direction among one side surfaces of the battery case 110 in the first direction. The first frame 210 presses and fixes the battery cell 100 to the other side in the first direction via the first pressing surface (S1), but does not contact one side end portion (E1) or the other side end portion (E2) in the second direction among one side surfaces of the battery case 110 in the first direction due to the first pressing prevention groove (H1), and one side end portion (E1) or the other side end portion (E2) in the second direction among one side surfaces of the battery case 110 in the first direction may not be pressed and fixed to the other side in the first direction. The second frame 220 may include a second base portion 222 disposed on the other side of the battery cell 100 in the first direction. The second base portion 222 has a second pressing surface (S2) that contacts the other side surface of the battery case 110 in the first direction and is formed on one side or the other side of the second pressing surface (S2) in the second direction, but is recessed in the other direction of the first direction, and includes a second pressing prevention groove (H2) facing one side end portion (E3) or the other side end portion (E4) in the second direction among the other side surfaces of the battery case 110 in the first direction. The second frame 220 presses and fixes the battery cell 100 to one side in the first direction via the second pressing surface (S2), but does not contact one side end portion (E3) or the other side end portion (E4) in the second direction among the other side surfaces of the battery case 110 in the first direction due to the second pressing prevention groove (H2), and one side end portion (E3) or the other side end portion (E4) in the second direction among the other side surfaces of the battery case 110 in the first direction may not be pressed and fixed to one side in the first direction.

[0117] Thereby, the first frame 210 and the second frame 220 that press both side surfaces of the battery case 110 in the first direction to fix the battery cell 100 but do not press and fix the corner portions on one side or the other side of the battery case 110 in the second direction can be easily manufactured with a simple configuration and at a low cost.

[0118] In addition, the first pressure prevention groove (H1) and the second pressure prevention groove (H2) of the first frame 210 and the second frame 220 are formed to face the corner part on one side or the other side in the second direction of the battery case 110, so that the corner part on one side or the other side in the second direction of the battery case 110 can be covered by the first frame 210 and the second frame 220 without being pressure-fixed by the first frame 210 and the second frame 220. Therefore, the corner part on one side or the other side in the second direction of the battery case 110 that is not pressure-fixed by the first frame 210 and the second frame 220 can also be protected from external impacts and the like by the first frame 210 and the second frame 220. For this reason, the defect rate of the battery cell 100 can be reduced, and thus the manufacturing cost of the battery cell 100 can be saved.

[0119] According to an embodiment of the present invention, the first frame 210 is not in contact with one side end (E1) and the other side end (E2) in the second direction among one side surfaces of the battery case 110 in the first direction, and it is not necessary to press and fix one side end (E1) and the other side end (E2) in the second direction to the other side in the first direction. The first base portion 212 is formed on one side and the other side in the second direction of the first pressing surface (S1), but is recessed in one direction in the first direction, and includes a pair of first pressing prevention grooves (H1) facing one side end (E1) and the other side end (E2) in the second direction among one side surfaces of the battery case 110 in the first direction, respectively. The first frame 210 is not in contact with one side end (E1) and the other side end (E2) in the second direction among one side surfaces of the battery case 110 in the first direction by the pair of first pressing prevention grooves (H1), and it is not necessary to press and fix one side end (E1) and the other side end (E2) in the second direction to the other side in the first direction. The second frame 220 is not in contact with one side end (E3) and the other side end (E4) in the second direction among the other side surfaces of the battery case 110 in the first direction, and it is not necessary to press and fix one side end (E3) and the other side end (E4) in the second direction to one side in the first direction. The second base portion 222 is formed on one side and the other side in the second direction of the second pressing surface (S2), but is recessed in the other direction in the first direction, and includes a pair of second pressing prevention grooves (H2) facing one side end (E3) and the other side end (E4) in the second direction among the other side surfaces of the battery case 110 in the first direction, respectively. The second frame 220 is not in contact with one side end (E3) and the other side end (E4) in the second direction among the other side surfaces of the battery case 110 in the first direction by the pair of second pressing prevention grooves (H2), and it is not necessary to press and fix one side end (E3) and the other side end (E4) in the second direction to one side in the first direction.

[0120] As a result, the first frame 210 and the second frame 220 do not press one end portion (E3) and the other end portion (E4) in the second direction against the other side and one side in the first direction of the battery case 110, respectively. Therefore, although both corner portions in the second direction of the battery case 110 are pressed by the first frame 210 and the second frame 220 and deformed into an incorrect shape, after the pressure is interrupted, it is possible to prevent both from being restored to the original correct shape and being deformed hardly. Thus, it is possible to prevent the appearance defect of the battery case 110 due to the pressure applied by the battery cell fixing device 200. For this reason, the defect rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0121] Also, although the battery case 110 is pressed to fix the battery cell 100, the first frame 210 and the second frame 220 that do not press and fix both corner portions in the second direction of the battery case 110 can be easily manufactured with a simple configuration and at a low cost.

[0122] In addition, since the pair of first pressure prevention grooves (H1) and the pair of second pressure prevention grooves (H2) of the first frame 210 and the second frame 220 are formed to face both corner portions in the second direction of the battery case 110, both corner portions in the second direction of the battery case 110 can be covered by the first frame 210 and the second frame 220 even if they are not pressure-fixed by the first frame 210 and the second frame 220. For this reason, both corner portions in the second direction of the battery case 110 that are not pressure-fixed by the first frame 210 and the second frame 220 can also be protected from external impacts and the like by the first frame 210 and the second frame 220. For this reason, since the defect rate of the battery cell 100 can be lowered, the manufacturing cost of the battery cell 100 can be saved.

[0123] According to an embodiment of the present invention, the first frame 210 may include a first base portion 212 disposed on one side of the battery cell 100 in a first direction. The first base portion 212 has a first pressing surface (S1) that contacts one side surface of the battery case 110 in the first direction and is formed on one side or the other side of the first pressing surface (S1) in a second direction, but is recessed in one direction of the first direction, and includes a first pressing prevention groove (H1) that faces one end portion (E1) or the other end portion (E2) in the second direction among one side surfaces of the battery case 110 in the first direction in the first direction.

[0124] Thereby, although the battery case 110 is pressed to fix the battery cell 100, the first frame 210 that does not press and fix the corner portions on one side or the other side of the battery case 110 in the second direction can be easily manufactured with a simple configuration and at a low cost.

[0125] In addition, the first pressing prevention groove (H1) of the first frame 210 is formed so as to face the corner portion on one side or the other side of the battery case 110 in the second direction, so that even if the corner portion on one side or the other side of the battery case 110 in the second direction is not pressed and fixed by the first frame 210, it can be covered by the first frame 210. For this reason, the corner portions on one side or the other side of the battery case 110 that are not pressed and fixed by the first frame 210 can also be protected from external impacts and the like by the first frame 210. For this reason, since the defect rate of the battery cell 100 can be reduced, the manufacturing cost of the battery cell 100 can be saved.

[0126] According to an embodiment of the present invention, one side surface of the battery case 110 in the first direction may extend in a third direction that intersects the first direction and the second direction. The first pressing surface (S1) and the first pressing prevention groove (H1) may extend in the third direction along one side surface of the battery case 110 in the first direction.

[0127] As a result, when a corner portion on one side or the other side in the second direction of the battery case 110 to which one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the first direction belongs extends in the third direction, it is possible to prevent any of the corner portions on one side or the other side in the second direction of the battery case 110 extending in the third direction from being pressed by the first frame 210. For this reason, although any of the corner portions on one side or the other side in the second direction of the battery case 110 are deformed into an incorrect shape, it is possible to prevent them from being deformed and being difficult to be restored. Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200. For this reason, the defective rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0128] According to an embodiment of the present invention, although the first base portion 212 is formed on one side or the other side in the third direction intersecting the first direction and the second direction of the first pressing surface (S1), it is recessed in one direction of the first direction and may include a third pressing prevention groove (H3) facing one end portion or the other end portion in the third direction of one side surface of the battery case 110 in the first direction. The first frame 210 presses and fixes the battery cell 100 to the other side in the first direction via the first pressing surface (S1), but does not contact one end portion or the other end portion in the third direction of one side surface of the battery case 110 due to the third pressing prevention groove (H3), and one end portion or the other end portion in the third direction of one side surface of the battery case 110 in the first direction may not be pressed and fixed to the other side in the first direction.

[0129] As a result, since the first frame 210 does not press one end portion or the other end portion in the third direction of one side surface of the battery case 110 to the other side in the first direction, although a corner portion on one side or the other side in the third direction of the battery case 110 is pressed by the first frame 210 and deformed into an incorrect shape, it is possible to prevent it from being deformed and being difficult to be restored to the original correct shape after the pressing is interrupted.

[0130] Further, even if the corner portions on one side or the other side in the third direction of the battery case 110 are not pressure-fixed by the first frame 210, they can be covered by the first frame 210. Therefore, the corner portions on one side or the other side in the third direction of the battery case 110 that are not pressure-fixed by the first frame 210 can also be protected by the first frame 210 from external impacts and the like. For this reason, the defective rate of the battery cell 100 can be lowered, and thus the manufacturing cost of the battery cell 100 can be reduced.

[0131] According to an embodiment of the present invention, the first frame 210 does not contact the one-side end portion (E1) and the other-side end portion (E2) in the second direction among the one-side surfaces of the battery case 110 in the first direction, and it is not necessary to press and fix the one-side end portion (E1) and the other-side end portion (E2) in the second direction of the one-side surface of the battery case 110 in the first direction to the other side in the first direction. Although the first base portion 212 is formed on one side and the other side in the second direction of the first pressure surface (S1), it is recessed in one direction in the first direction, and may include a pair of first pressure-preventing grooves (H1) facing the one-side end portion (E1) and the other-side end portion (E2) in the second direction of the one-side surface of the battery case 110 in the first direction, respectively. The first frame 210 does not contact the one-side end portion (E1) and the other-side end portion (E2) in the second direction of the one-side surface of the battery case 110 in the first direction by the pair of first pressure-preventing grooves (H1), and it is not necessary to press and fix the one-side end portion (E1) and the other-side end portion (E2) in the second direction of the one-side surface of the battery case 110 in the first direction to the other side in the first direction.

[0132] As a result, since the first frame 210 does not press the one-side end portion (E1) and the other-side end portion (E2) in the second direction of the one-side surface of the battery case 110 to the other side in the first direction, both corner portions in the second direction of the battery case 110 are pressed by the first frame 210 and deformed into an incorrect shape. However, after the pressure is interrupted, it is possible to prevent both the difficulty of restoring to the original correct shape and the deformation. Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressure of the battery cell fixing device 200. For this reason, the defective rate of the battery cell 100 can be decreased, and the manufacturing cost of the battery cell 100 can be reduced.

[0133] Also, although the battery case 110 is pressed to fix the battery cell 100, the first frame 210 that does not press and fix both corner portions of the battery case 110 in the second direction can be easily manufactured with a simple configuration and at a low cost.

[0134] In addition, since the pair of first pressure prevention grooves (H1) of the first frame 210 are formed so as to face both corner portions of the battery case 110 in the second direction, even if both corner portions of the battery case 110 in the second direction are not pressure-fixed by the first frame 210, they can both be covered by the first frame 210. For this reason, both corner portions of the battery case 110 in the second direction that are not pressure-fixed by the first frame 210 can also be protected from external impacts and the like by the first frame 210. For this reason, the defect rate of the battery cell 100 can be lowered, and thus the manufacturing cost of the battery cell 100 can be reduced.

[0135] According to an embodiment of the present invention, the first frame 210 is disposed on one side in the second direction of the first pressure prevention groove (H1) formed on one side in the second direction of the first pressure surface (S1) among the pair of first pressure prevention grooves (H1), and is coupled to the first base portion 212, and includes a first one-side support portion 214a that faces or contacts one side surface of the battery cell 100 in the second direction in the second direction, and is disposed on the other side in the second direction of the first pressure prevention groove (H1) formed on the other side in the second direction of the first pressure surface (S1) among the pair of first pressure prevention grooves (H1), and is coupled to the first base portion 212, and may include a first other-side support portion 214b that faces or contacts the other side surface of the battery cell 100 in the second direction in the second direction.

[0136] Thereby, it is possible to prevent the battery cell 100 from moving in one and the other directions in the second direction or from detaching from the first frame 210 in one and the other directions in the second direction.

[0137] Also, although the battery case 110 is pressed to fix the battery cell 100, the corner portions on both sides in the second direction of the battery case 110 are not pressed and fixed, and the first frame 210 that prevents the battery cell 100 from moving in one or the other direction in the second direction or detaching from the first frame 210 in one or the other direction in the second direction can be easily manufactured with a simple configuration and at a low cost.

[0138] According to an embodiment of the present invention, the first frame 210 may be disposed on one side in the second direction of the first pressure prevention groove (H1) formed on one side in the second direction of the first pressure surface (S1), or on the other side in the second direction of the first pressure prevention groove (H1) formed on the other side in the second direction of the first pressure surface (S1), and may be coupled to the first base portion 212 and include a first support portion 214 facing or contacting one side surface or the other side surface of the battery cell 100 in the second direction.

[0139] Thereby, it is possible to prevent the battery cell 100 from moving in one or the other direction in the second direction or detaching from the first frame 210 in one or the other direction in the second direction.

[0140] Also, although the battery case 110 is pressed to fix the battery cell 100, the corner portion on one side or the other side in the second direction of the battery case 110 is not pressed and fixed, and the first frame 210 that prevents the battery cell 100 from moving in one or the other direction in the second direction or detaching from the first frame 210 in one or the other direction in the second direction can be easily manufactured with a simple configuration and at a low cost.

[0141] According to an embodiment of the present invention, the battery case 110 may include a first case part 110a extending in a second direction, a first direction, and a third direction intersecting the second direction, and a second case part 110b disposed on one side of the first case part 110a in the first direction and covering the first case part 110a. The electrode assembly 120 can be accommodated between the first case part 110a and the second case part 110b. The first case part 110a may include a first accommodation part 112a and a first extending part 114a. The second case part 110b may include a second accommodation part 112b and a second extending part 114b. The first accommodation part 112a and the second accommodation part 112b may face each other or be in contact with each other to form an accommodation space (AS) for accommodating the electrode assembly 120 therein. The first extending part 114a and the second extending part 114b extend outward from the first accommodation part 112a and the second accommodation part 112b, respectively, but extend at least in one or the other of the second direction from the first accommodation part 112a and the second accommodation part 112b, respectively, at least partially surround the first accommodation part 112a and the second accommodation part 112b, respectively, and are joinable to each other. The second accommodation part 112b may protrude in one direction of the first direction more than the second extending part 114b. The first pressing surface (S1) may be in contact with one side surface of the second accommodation part 112b in the first direction. The first pressure prevention groove (H1) may face the one side end (E1) or the other side end (E2) in the second direction among one side surfaces of the second accommodation part 112b in the first direction. The first frame 210 presses and fixes the second accommodation part 112b of the battery cell 100 in the other direction of the first direction via the first pressing surface (S1), but does not contact the one side end (E1) or the other side end (E2) in the second direction among one side surfaces of the second accommodation part 112b in the first direction, and it may not be necessary to press and fix the one side end (E1) or the other side end (E2) in the second direction among one side surfaces of the second accommodation part 112b in the other direction of the first direction. The first support part 214 may face or be in contact with one side surface or the other side surface of the second accommodation part 112b in the second direction and may be in contact with one side surface of the second extending part 114b in the first direction. The first frame 210 can press and fix the second extending part 114b of the battery cell 100 in the other direction of the first direction via the first support part 214.

[0142] As a result, the first frame 210 presses both the second accommodating portion 112b and the second extending portion 114b of the battery cell 100 toward the other side in the first direction, so that the first frame 210 can stably fix the battery cell 100, and the battery case 110 can maintain its correct shape in a state where the electrode assembly 120 is accommodated inside the battery case 110.

[0143] In addition, the first frame 210 that can stably fix the battery cell 100 and can maintain the correct shape of the battery case 110 in a state where the electrode assembly 120 is accommodated inside the battery case 110 can be easily manufactured with a simple configuration and at a low cost.

[0144] According to an embodiment of the present invention, the battery case 110 may include a first case portion 110a extending in a second direction, a first direction, and a third direction intersecting the second direction, and a second case portion 110b disposed on one side of the first case portion 110a in the first direction and covering the first case portion 110a. The electrode assembly 120 can be accommodated between the first case portion 110a and the second case portion 110b. The first case portion 110a and the second case portion 110b may each include a first accommodating portion 112a and a second accommodating portion 112b that face or contact each other and form an accommodating space (AS) in which the electrode assembly 120 is accommodated. The width (W1) of the accommodating space (AS) in the second direction is larger than the width (W2) of the electrode assembly 120 in the second direction. Accordingly, at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction may not be supported in the first direction by the electrode assembly 120. The first frame 210 contacts one side surface of the second accommodating portion 112b in the first direction and presses and fixes the battery cell 100 toward the other side in the first direction, but does not contact one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction, and does not need to press and fix one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction toward the other side in the first direction.

[0145] Accordingly, even if at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction is not supported in the first direction by the electrode assembly 120, the first frame 210 does not press the corner portion on one side or the other side in the second direction of the second accommodating portion 112b toward the other side in the first direction, so that it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200.

[0146] According to an embodiment of the present invention, in the second case portion 110b, one end portion or the other end portion in the second direction is connected to one end portion or the other end portion in the second direction of the first case portion 110a, and other portions except the one end portion or the other end portion in the second direction are separable from the first case portion 110a and can be bent relative to the first case portion 110a to face the first case portion 110a in the first direction and cover the first case portion 110a. The second accommodating portion 112b has a concave shape for accommodating at least a part of the electrode assembly 120, whereby a predetermined space (PS2) forming at least a part of the accommodating space (AS) can be defined. When the second case portion 110b is bent relative to the first case portion 110a with the electrode assembly 120 disposed in the first accommodating portion 112a, the width (W1') in the second direction of the predetermined space (PS2) in the accommodating space (AS) is larger than the width (W2) in the second direction of the electrode assembly 120 so that the second accommodating portion 112b does not interfere with the electrode assembly 120. Accordingly, at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction may not be supported in the first direction by the electrode assembly 120.

[0147] Thus, when the second case part 110b connected to the end of the first case part 110a is bent to cover the first accommodation part 112a with the second accommodation part 112b, the width (W1') in the second direction of the second predetermined space (PS2) of the second accommodation part 112b is set to be larger than the width (W2) in the second direction of the electrode assembly 120 so that the second accommodation part 112b does not interfere with the electrode assembly 120. As a result, even if at least a part of the corner part on one side or the other side in the second direction of the second accommodation part 112b is not supported in the first direction by the electrode assembly 120, the first frame 210 does not press the corner part on one side or the other side in the second direction of the second accommodation part 112b toward the other side in the first direction, so that it is possible to prevent the occurrence of defective appearance of the battery case 110 due to the pressing of the battery cell fixing device 200.

[0148] According to an embodiment of the present invention, the length in the second direction of one end (E1) or the other end (E2) in the second direction that is not in contact with the first frame 210 among the one side surfaces in the first direction of the battery case 110 may be larger than 1 / 40 of the length in the second direction of the one side surface in the first direction of the battery case 110, or may be the same, and may also be smaller than 1 / 5 or the same.

[0149] As a result, the length in the second direction of one end (E1) or the other end (E2) in the second direction that is not in contact with the first frame 210 among the one side surfaces in the first direction of the battery case 110 is not smaller than 1 / 40 of the length in the second direction of the one side surface in the first direction of the battery case 110, so that a corner part region on one side or the other side in the second direction of the battery case 110 that is not pressed by the first frame 210 is sufficiently secured, and the occurrence of defective appearance of the battery case 110 can be prevented. Further, the length in the second direction of one end (E1) or the other end (E2) in the second direction that is not in contact with the first frame 210 among the one side surfaces in the first direction of the battery case 110 is not larger than 1 / 5 of the length in the second direction of the one side surface in the first direction of the battery case 110, so that a region of the battery case 110 that can be pressed by the first frame 210 is sufficiently secured, and the battery cell 100 can be stably fixed.

[0150] The above-described effects and the specific effects of the present invention will be described and described in the following embodiments for carrying out the invention.

Brief Description of the Drawings

[0151]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying out the Invention

[0152] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, whereby a person having ordinary knowledge in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. In the description of the present invention, when it is determined that a specific description of a known technique related to the present invention obscures the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0153] Although terms such as first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are merely used to distinguish one component from another, and of course, unless otherwise stated, the first component may be the second component.

[0154] Unless otherwise stated throughout the specification, each component may be singular or plural.

[0155] Hereinafter, the statement that any configuration is arranged "above (or below)" a component or "on (or under)" a component means that not only is any configuration arranged in contact with the upper surface (or lower surface) of the said component, but other configurations may also be interposed between the said component and any configuration arranged "above (or below)" the said component.

[0156] Also, when a component is described as being "connected", "coupled" or "joined" to another component, although the said components may be directly connected or joined to each other, it must be understood that other components may "intervene" between the components, or the components may be "connected", "coupled" or "joined" through other components.

[0157] The singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. Terms such as "configured" or "including" in this application should not be construed as necessarily including all of the multiple components or multiple steps described in the specification. It should be understood that some of the components or some of the steps may not be included, or may further include additional components or steps.

[0158] On the other hand, the predetermined space (PS2) described in the claims may be the second predetermined space (PS2) described hereinafter.

[0159] FIG. 1 and FIG. 2 are perspective views schematically showing a battery cell and a battery cell fixing device according to an embodiment of the present invention. FIGS. 3 and 4 are exploded perspective views of FIGS. 1 and 2. FIG. 5 is a side view of the battery cell and the battery cell fixing device of FIGS. 1 and 2. FIG. 6 is a side cross-sectional view of the battery cell and the battery cell fixing device of FIGS. 1 and 2. FIG. 7 is an exploded perspective view of the battery cell of FIGS. 1 to 6. FIG. 8 is a state diagram showing a state in which when the battery case of the battery cell of FIG. 7 is bent, the battery case interferes with the electrode assembly disposed inside the battery cell.

[0160] [Battery cell] Referring to FIGS. 1 to 8, a battery cell 100 according to an embodiment may include a battery case 110 and an electrode assembly 120.

[0161] [Battery case] The battery case 110 may include a first case part 110a and a second case part 110b. The battery case 110 can be formed of a material containing, for example, aluminum.

[0162] [First case part] The first case part 110a may extend in a second direction (for example, the front-rear direction) and a third direction (for example, the left-right direction). Here, the second direction can intersect the first direction (for example, the up-down direction), and the third direction can intersect the first direction and the second direction.

[0163] The first case part 110a may include a first accommodation part 112a. The first case part 110a may include a first extending part 114a.

[0164] The first accommodation part 112a can face or contact the second accommodation part 112b of the second case part 110b to form an accommodation space (AS, FIG. 6) in which the electrode assembly 120 described later is accommodated inside.

[0165] The first accommodating portion 112a may have a concave shape for accommodating at least a part of the electrode assembly 120. Therefore, a first predetermined space (PS1) that forms at least a part (for example, the lower half of the accommodating space) of the accommodating space (AS) can be defined by the concave first accommodating portion 112a (Figs. 6 to 8).

[0166] However, it is not limited to such a configuration. For example, the first accommodating portion 112a may be flat.

[0167] The first extending portion 114a extends outward from the first accommodating portion 112a, but may extend from the first accommodating portion 112a in at least one of the other directions (for example, forward) and the other direction (for example, backward) in the second direction. The first extending portion 114a may at least partially surround the first accommodating portion 112a. The first extending portion 114a can be joined to the second extending portion 114b of the second case portion 110b.

[0168] The first accommodating portion 112a may protrude in the other direction (for example, downward) in the first direction from the first extending portion 114a. For example, the first accommodating portion 112a may have a concave shape to define the first predetermined space (PS1) and may protrude in the other direction in the first direction from the first extending portion 114a.

[0169] [Second case portion] The second case portion 110b may be disposed on one side (for example, the upper side) in the first direction of the first case portion 110a. The second case portion 110b may cover the first case portion 110a (Figs. 3 to 6 and 8).

[0170] The second case portion 110b may include a second accommodating portion 112b. The second case portion 110b may include a second extending portion 114b.

[0171] The second accommodating portion 112b can face or contact the first accommodating portion 112a of the first case portion 110a to form an accommodating space (AS, Fig. 6) for accommodating the electrode assembly 120 described later inside.

[0172] The width (W1) of the accommodation space (AS) in the second direction may be larger than the width (W2) of the electrode assembly 120 in the second direction (Fig. 6). For this reason, at least a part of one end (for example, the front side) or the other end (for example, the rear side) of one side surface (for example, the upper side surface) of the second accommodating portion 112b in the first direction may not be supported in the first direction by the electrode assembly 120 (Fig. 6).

[0173] For example, since the width (W1) of the accommodation space (AS) in the second direction is larger than the width (W2) of the electrode assembly 120 in the second direction, the electrode assembly 120 may be separated from one end (for example, the front end) of the second accommodating portion 112b by a distance (D1) in the second direction and from the other end (for example, the rear end) of the second accommodating portion 112b by a distance (D2) (Fig. 6). Here, the distance (D1) and the distance (D2) may be larger than the thickness of the second accommodating portion 112b. For this reason, the portion corresponding to the section in the second direction from one end of one end (E1) in the second direction of one side surface of the second accommodating portion 112b to the distance (D1) and the portion corresponding to the section in the second direction from the other end of the other end (E2) in the second direction to the distance (D2) may not be supported in the first direction by the electrode assembly 120 (Fig. 6).

[0174] In this way, since at least a part of one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodating portion 112b is not supported in the first direction by the electrode assembly 120, when one end or the other end in the second direction of the second accommodating portion 112b is pressed in the other direction (for example, downward) in the first direction by the first frame 210 described later, it is likely to be deformed in the other direction in the first direction. This will be described later.

[0175] On the other hand, the above-described problem may also occur in the first accommodating portion 112a described above. That is, when the width (W1) of the accommodating space (AS) in the second direction is larger than the width (W2) of the electrode assembly 120 in the second direction, at least a part of the other side surface (for example, the lower side surface) of the first accommodating portion 112a in the first direction, that is, at least a part of one end portion (for example, the front end portion) (E3) or the other end portion (for example, the rear end portion) (E4) in the second direction is not supported by the electrode assembly 120 in the first direction, and when it is pressed upward (for example, in one direction in the first direction) by the second frame 220 described later, it is likely to deform in one direction in the first direction (FIG. 6). This will be described later.

[0176] The second accommodating portion 112b may have a concave shape for accommodating at least a part of the electrode assembly 120. For this reason, it is possible to define a second predetermined space (PS2) that forms at least a part (for example, the upper half of the accommodating space) of the accommodating space (AS) by the concave second accommodating portion 112b (FIGS. 6 to 8). However, the present invention is not limited to such a configuration.

[0177] The second extending portion 114b extends outward from the second accommodating portion 112b, but may extend at least in one direction (for example, forward) or the other direction (for example, backward) in the second direction from the second accommodating portion 112b. The second extending portion 114b may at least partially surround the second accommodating portion 112b. The second extending portion 114b may be joined to the first extending portion 114a of the first case portion 110a.

[0178] The second accommodating portion 112b may protrude upward (for example, in one direction in the first direction) from the second extending portion 114b. For example, the second accommodating portion 112b may have a concave shape to define the second predetermined space (PS2), and may protrude upward in one direction in the first direction from the second extending portion 114b.

[0179] On the other hand, one side end or the other side end of the second case part 110b in the second direction may be connected to one side end or the other side end of the first case part 110a in the second direction (Figs. 7 and 8). For example, as shown in Fig. 8, the other side end of the second case part 110b in the second direction may be connected to the other side end of the first case part 110a in the second direction.

[0180] Other parts of the second case part 110b except the one side end or the other side end in the second direction connected to the first case part 110a are separable from the first case part 110a (Figs. 7 and 8).

[0181] The second case part 110b may be bent relative to the first case part 110a so as to face the first case part 110a in the first direction and cover the first case part 110a (Fig. 8). For example, the one side end or the other side end in the second direction of the second case part 110b connected to the first case part 110a may be bent so that the second case part 110b faces the first case part 110a in the first direction and covers the first case part 110a.

[0182] At this time, as described above, when the second accommodation part 112b has a concave shape to accommodate at least a part of the electrode assembly 120, and thus a second predetermined space (PS2) forming at least a part of the accommodation space (AS) is defined, when the second case part 110b is bent relative to the first case part 110a with the electrode assembly 120 disposed in the first accommodation part 112a, the concave second accommodation part 112b may interfere with the electrode assembly 120. For example, as shown in Fig. 8, the second accommodation part 112b may interfere with an interference part (F) of the electrode assembly 120 located on one side in the first direction and one side in the second direction of the electrode assembly 120.

[0183] In order to prevent the second accommodating portion 112b from interfering with the electrode assembly 120, in the accommodation space (AS), the width (W1', FIGS. 6 and 8) in the second direction of the second predetermined space (PS2) defined by the concave second accommodating portion 112b needs to be sufficiently larger than the width (W2) in the second direction of the electrode assembly 120. However, if the width (W1') in the second direction of the second predetermined space (PS2) in the accommodation space (AS) is larger than the width (W2) in the second direction of the electrode assembly 120, as described above, at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface in the first direction of the second accommodating portion 112b may not be supported in the first direction by the electrode assembly 120 (FIG. 6).

[0184] That is, when the second case portion 110b connected to the end portion of the first case portion 110a is bent to cover the first accommodating portion 112a with the second accommodating portion 112b, in order for the second accommodating portion 112b not to interfere with the electrode assembly 120, the width (W1') in the second direction of the second predetermined space (PS2) of the second accommodating portion 112b needs to be larger than the width (W2) in the second direction of the electrode assembly 120. Therefore, at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface in the first direction of the second accommodating portion 112b may not be supported in the first direction by the electrode assembly 120. This will be described later.

[0185] [Electrode assembly] The electrode assembly 120 can be accommodated inside the battery case 100. Specifically, the electrode assembly 120 can be accommodated between the first case portion 110a and the second case portion 110b. For example, the electrode assembly 120 can be accommodated between the first accommodating portion 112a and the second accommodating portion 112b.

[0186] The electrode assembly 120 may include one or more electrodes (not shown) and one or more separator membranes (not shown). The electrodes and the separator membranes may be alternately laminated in the first direction.

[0187] Each electrode and each separator membrane may extend in the second and third directions. Therefore, the electrode assembly 120 may extend in the second and third directions.

[0188] The electrode assembly 120 may include a pair of terminals 122. The pair of terminals 122 may protrude in the third direction.

[0189] [Battery cell fixing device] Referring to FIGS. 1 to 6, a battery cell fixing device 200 according to an embodiment may include a first frame 210 and a second frame 220.

[0190] The battery cell fixing device 200 can fix the battery cell 100. Therefore, the battery cell fixing device 200 can stably transfer the battery cell 100 to the working area of one or more processes, or fix the battery cell 100 in one or more processes (for example, the sealing process), and can be used when performing a predetermined operation (for example, the sealing operation).

[0191] In addition, the battery cell fixing device 200 can be used so that the battery case 110 can maintain the correct shape with the electrode assembly 120 accommodated inside the battery case 110. For example, as shown in FIGS. 7 and 8, when the battery case 110 is bent and the electrode assembly 120 is accommodated inside the battery case 110, as shown in FIGS. 5 and 6, with the electrode assembly 120 accommodated inside the battery case 110, the battery case 110 can be pressed and fixed by the battery cell fixing device 200 so that the battery case 110 is completely bent and maintains the correct overlapping shape.

[0192] [First frame] The first frame 210 is in contact with one side surface (for example, the upper side surface) of the battery case 110 in the first direction (for example, the vertical direction), and can press and fix the battery cell 100 in the other direction (for example, the lower direction) of the first direction.

[0193] Here, the pressurization may include relative pressurization. The same applies hereinafter. For example, when the second frame 220 or the like pressurizes the battery cell 100 in one direction of the first direction, even if the first frame 210 is fixed, the first frame 210 can relatively pressurize the battery cell 100 in the other direction of the first direction.

[0194] At this time, the first frame 210 is not in contact with one end (for example, the front end) (E1) or the other end (for example, the rear end) (E2) in the second direction (for example, the front-rear direction) intersecting the first direction among one side surfaces of the battery case 110 in the first direction, and one side end (E1) or the other side end (E2) in the second direction among one side surfaces of the battery case 110 in the first direction may not be pressurized and fixed in the other direction of the first direction.

[0195] For example, the first frame 210 can be in contact with one side surface in the first direction of the second housing portion 112b of the second case portion 110b of the battery case 110 forming one side surface of the battery case 110 in the first direction, and pressurize and fix the second housing portion 112b and the battery cell 100 in the other direction of the first direction. At this time, the first frame 210 is not in contact with one end (E1) or the other end (E2) in the second direction among one side surfaces in the first direction of the second housing portion 112b, and one side end (E1) or the other side end (E2) in the second direction among one side surfaces in the first direction of the second housing portion 112b may not be pressurized and fixed in the other direction of the first direction (FIGS. 5 and 6).

[0196] Thereby, since the first frame 210 pressurizes the central portion in the second direction between the one side end (E1) and the other side end (E2) in the second direction among one side surfaces of the battery case 110 in the first direction in the other direction of the first direction, the battery cell 100 can be stably fixed. For this reason, i) the battery cell 100 can be stably transferred to the working area of one or more processes, ii) in one or more processes, the battery cell 100 can smoothly perform a predetermined operation in a stably fixed state, and iii) the correct shape of the battery case 110 can be stably maintained in a state where the electrode assembly 120 is accommodated inside the battery case 110.

[0197] In addition, since the first frame 210 does not press one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the first direction toward the other side in the first direction, although the corner portion on one side or the other side in the second direction of the battery case 110 is pressed by the first frame 210 and deformed into an incorrect shape, after the pressing is interrupted, it is possible to prevent the battery case 110 from being restored to its original correct shape and being deformed. In particular, when the corner portion of the battery case 110 is pressed by the battery cell fixing device 200, although the corner portion may be deformed into an incorrect shape due to design tolerances, assembly tolerances, alignment errors, etc. of the battery cell 100 or the battery cell fixing device 200, since it is difficult to be restored and may be deformed, it is preferable not to press the corner portion of the battery case 110 with the battery cell fixing device 200.

[0198] For example, when the central portion in the second direction between one end portion (E1) and the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction is pressed by the first frame 210, due to design tolerances, assembly tolerances, alignment errors, etc., even if the corner portion on one side or the other side in the second direction of the second accommodating portion 112b to which one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b belongs is bent and temporarily deformed, since the corner portion on one side or the other side in the second direction of the second accommodating portion 112b is not pressed by the first frame 210, when the pressing of the first frame 210 against the central portion in the second direction of one side surface of the second accommodating portion 112b in the first direction is interrupted, the corner portion on one side or the other side in the second direction of the second accommodating portion 112b is easily restored to its original correct shape.

[0199] Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200. For this reason, the defect rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0200] In addition, since the first frame 210 does not press one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the first direction, even if the thickness of the battery case 110 increases, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200. For this reason, the occurrence of appearance defects can be prevented, and the durability of the battery case 110 can be improved.

[0201] Specifically considering this, it is as follows. Generally, the greater the increase in the thickness of the battery case 110, the more it is pressed with the same magnitude of pressure, and the degree to which the deformed battery case 110 can be restored to its original shape may decrease. However, in the present invention, since the first frame 210 does not press one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 in the first direction, even if the thickness of the battery case 110 increases, the corners on one side or the other side in the second direction of the battery case 110 to which one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the battery case 110 belong do not have the problem of not being restored after being deformed by the pressing of the first frame 210.

[0202] At this time, as described above, the width (W1) in the second direction of the accommodation space (AS) may be larger than the width (W2) in the second direction of the electrode assembly 120 (FIG. 6). For this reason, at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodation portion 112b may not be supported in the first direction by the electrode assembly 120.

[0203] Thereby, even if at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodation portion 112b is not supported in the first direction by the electrode assembly 120, since the first frame 210 does not press the corners on one side or the other side in the second direction of the second accommodation portion 112b toward the other in the first direction, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200.

[0204] When at least a part of a corner portion on one side or the other side in the second direction of the second accommodating portion 112b, to which one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b belongs, is pressed by the first frame 210 toward the other side in the first direction, it is not supported by the electrode assembly 120, is likely to deform toward the other side in the first direction, but is difficult to be restored and can be deformed.

[0205] At this time, as described above, when the second case portion 110b is bent relative to the first case portion 110a with the electrode assembly 120 disposed in the first accommodating portion 112a, the width (W1') in the second direction of the second predetermined space (PS2) in the accommodation space (AS) may be larger than the width (W2) in the second direction of the electrode assembly 120 so that the second accommodating portion 112b does not interfere with the electrode assembly 120 (FIGS. 6 and 8). For this reason, at least a part of one end portion (E1) or the other end portion (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction may not be supported in the first direction by the electrode assembly 120.

[0206] Thereby, when the second case portion 110b connected to the end portion of the first case portion 110a is bent to cover the first accommodating portion 112a with the second accommodating portion 112b, the width (W1') in the second direction of the second predetermined space (PS2) of the second accommodating portion 112b is set to be larger than the width (W2) in the second direction of the electrode assembly 120 so that the second accommodating portion 112b does not interfere with the electrode assembly 120. As a result, even if at least a part of a corner portion on one side or the other side in the second direction of the second accommodating portion 112b is not supported in the first direction by the electrode assembly 120, the first frame 210 does not press the corner portion on one side or the other side in the second direction of the second accommodating portion 112b toward the other side in the first direction, and thus it is possible to prevent the appearance defect of the battery case 110 due to the pressing of the battery cell fixing device 200.

[0207] On one side, among the one side surfaces of the battery case 110 in the first direction, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction that is not in contact with the first frame 210 may be greater than or the same as 1 / 40 of the length in the second direction of the one side surface of the battery case 110 in the first direction, and may also be less than or the same as 1 / 5.

[0208] For example, among the one side surfaces of the second accommodating portion 112b in the first direction, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction that is not in contact with the first frame 210 may be greater than or the same as 1 / 40 of the length in the second direction of the one side surface of the second accommodating portion 112b in the first direction, and may also be less than or the same as 1 / 5.

[0209] Thereby, among the one side surfaces of the battery case 110 in the first direction, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction that is not in contact with the first frame 210 is not less than 1 / 40 of the length in the second direction of the one side surface of the battery case 110 in the first direction. Therefore, a sufficient corner portion region on one side or the other side in the second direction of the battery case 110 that is not pressurized by the first frame 210 is ensured, and the occurrence of appearance defects of the battery case 110 can be prevented. Also, among the one side surfaces of the battery case 110 in the first direction, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction that is not in contact with the first frame 210 is not greater than 1 / 5 of the length in the second direction of the one side surface of the battery case 110 in the first direction. Therefore, a sufficient region of the battery case 110 that can be pressurized by the first frame 210 is ensured, and the battery cell 100 can be stably fixed.

[0210] The first frame 210 may include a first base portion 212. The first frame 210 may include a first support portion 214. Hereinafter, the first base portion 212 and the first support portion 214 will be considered.

[0211] [First Base Portion] The first base portion 212 may be disposed on one side of the battery cell 100 in the first direction.

[0212] The first base portion 212 may include a first pressing surface (S1) and a first pressing prevention groove (H1). The first base portion 212 may include a third pressing prevention groove (H3) (FIGS. 2 and 4).

[0213] The first pressing surface (S1) may be in contact with one side surface of the battery case 110 in the first direction. For example, the first pressing surface (S1) may be in contact with one side surface of the second accommodating portion 112b in the first direction.

[0214] The first frame 210 may press and fix the battery cell 100 to the other side in the first direction via the first pressing surface (S1). For example, the first frame 210 may press and fix the second accommodating portion 112b of the battery cell 100 to the other side in the first direction via the first pressing surface (S1).

[0215] The first pressing prevention groove (H1) is formed on one side or the other side of the first pressing surface (S1) in the second direction, and may be recessed in one direction in the first direction.

[0216] The first pressing prevention groove (H1) may face the one end portion (E1) or the other end portion (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction. For example, the first pressing prevention groove (H1) may face the one end portion (E1) or the other end portion (E2) in the second direction among the one side surfaces of the second accommodating portion 112b in the first direction.

[0217] Due to the first pressing prevention groove (H1), the first frame 210 does not contact the one end portion (E1) or the other end portion (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction, and it is not necessary to press and fix the one end portion (E1) or the other end portion (E2) in the second direction among the one side surfaces of the battery case 110 in the first direction to the other side in the first direction. For example, due to the first pressing prevention groove (H1), the first frame 210 does not contact the one end portion (E1) or the other end portion (E2) in the second direction among the one side surfaces of the second accommodating portion 112b in the first direction, and it is not necessary to press and fix the one end portion (E1) or the other end portion (E2) in the second direction among the one side surfaces of the second accommodating portion 112b in the first direction to the other side in the first direction.

[0218] By doing so, although the battery case 110 is pressurized to fix the battery cell 100, the first frame 210 that does not pressurize and fix the corner portion on one side or the other side in the second direction of the battery case 110 can be easily manufactured with a simple configuration and at a low cost.

[0219] In addition, the first pressure prevention groove (H1) of the first frame 210 is formed so as to face the corner portion on one side or the other side in the second direction of the battery case 110. Even if the corner portion on one side or the other side in the second direction of the battery case 110 is not pressurized and fixed by the first frame 210, it can be covered by the first frame 210. For this reason, the corner portion on one side or the other side in the second direction of the battery case 110 that is not pressurized and fixed by the first frame 210 can also be protected from external impacts and the like by the first frame 210. For this reason, the defect rate of the battery cell 100 can be reduced, and thus the manufacturing cost of the battery cell 100 can be saved.

[0220] On the other hand, the first frame 210 does not contact the one-side end portion (E1) and the other-side end portion (E2) in the second direction among the one-side surfaces of the battery case 110 in the first direction, and among the one-side surfaces of the battery case 110 in the first direction, the one-side end portion (E1) and the other-side end portion (E2) in the second direction do not need to be pressurized and fixed to the other side in the first direction.

[0221] Specifically, the first base portion 212 may include a pair of first pressure prevention grooves (H1). Although the pair of first pressure prevention grooves (H1) are respectively formed on one side and the other side in the second direction of the first pressure surface (S1), they may be respectively recessed in one direction in the first direction. The pair of first pressure prevention grooves (H1) may respectively face the one-side end portion (E1) and the other-side end portion (E2) in the second direction among the one-side surfaces of the battery case 110 in the first direction.

[0222] At this time, the first frame 210 is not in contact with one side end (E1) and the other side end (E2) in the second direction among one side surfaces of the battery case 110 in the first direction, and among one side surfaces of the battery case 110 in the first direction, it is not necessary to press and fix one side end (E1) and the other side end (E2) in the second direction to the other side in the first direction.

[0223] As a result, since the first frame 210 does not press one side end (E1) and the other side end (E2) in the second direction among one side surfaces of the battery case 110 to the other side in the first direction, although both corner portions in the second direction of the battery case 110 are pressed by the first frame 210 and deformed into an incorrect shape, after the pressing is interrupted, it is possible to prevent both from being difficult to restore to the original correct shape and being deformed. Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200. For this reason, the defect rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0224] Also, although the battery case 110 is pressed to fix the battery cell 100, the first frame 210 that does not press and fix both corner portions in the second direction of the battery case 110 can be easily manufactured with a simple configuration and at a low cost.

[0225] Also, since the pair of first pressure prevention grooves (H1) of the first frame 210 are formed so as to face both corner portions in the second direction of the battery case 110, both corner portions in the second direction of the battery case 110 can be covered by the first frame 210 even if they are not pressure-fixed by the first frame 210. For this reason, both corner portions in the second direction of the battery case 110 that are not pressure-fixed by the first frame 210 can also be protected from external impacts and the like by the first frame 210. For this reason, since the defect rate of the battery cell 100 can be lowered, the manufacturing cost of the battery cell 100 can be saved.

[0226] When one side surface of the battery case 110 in the first direction extends in a third direction that intersects the first direction and the second direction, the first pressing surface (S1) and the first pressing prevention groove (H1) may extend in the third direction along one side surface of the battery case 110 in the first direction (FIGS. 1 to 4).

[0227] For example, when one side surface of the second accommodating portion 112b in the first direction extends in the third direction, the first pressing surface (S1) and the first pressing prevention groove (H1) may extend in the third direction along one side surface of the second accommodating portion 112b in the first direction (FIGS. 1 to 4).

[0228] Thereby, when a corner portion on one side or the other side in the second direction of the battery case 110 to which one end portion (E1) or the other end portion (E2) on one side in the second direction of one side surface of the battery case 110 in the first direction belongs extends in the third direction, it is possible to prevent any of the corner portions on one side or the other side in the second direction of the battery case 110 extending in the third direction from being pressed by the first frame 210. For this reason, although any of the corner portions on one side or the other side in the second direction of the battery case 110 are deformed into an incorrect shape, it is possible to prevent them from being deformed and being difficult to be restored. Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressing of the battery cell fixing device 200. For this reason, the defective rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0229] Although the third pressing prevention groove (H3) is formed on one side or the other side in the third direction of the first pressing surface (S1), it may be formed to be recessed in one direction of the first direction.

[0230] The third pressing prevention groove (H3) may face one end portion or the other end portion in the third direction of one side surface of the battery case 110 in the first direction in the first direction. For example, the third pressing prevention groove (H3) may face one end portion or the other end portion in the third direction of one side surface of the second accommodating portion 112b in the first direction in the first direction.

[0231] Due to the third pressure prevention groove (H3), the first frame 210 does not contact the one side end or the other side end in the third direction of one side surface of the battery case 110 in the first direction, and it is not necessary to press and fix the one side end or the other side end in the third direction of one side surface of the battery case 110 to the other side in the first direction. For example, due to the third pressure prevention groove (H3), the first frame 210 does not contact the one side end or the other side end in the third direction of one side surface of the second accommodating portion 112b in the first direction, and it is not necessary to press and fix the one side end or the other side end in the third direction of one side surface of the second accommodating portion 112b to the other side in the first direction.

[0232] As a result, since the first frame 210 does not press the one side end or the other side end in the third direction of one side surface of the battery case 110 to the other side in the first direction, although the corner portion on one side or the other side in the third direction of the battery case 110 is pressed by the first frame 210 and deformed into an incorrect shape, after the pressure is interrupted, it is possible to prevent the battery case 110 from being deformed and being difficult to restore to the original correct shape.

[0233] In addition, the corner portion on one side or the other side in the third direction of the battery case 110 can be covered by the first frame 210 without being press-fixed by the first frame 210. Therefore, the corner portion on one side or the other side in the third direction of the battery case 110 that is not press-fixed by the first frame 210 can also be protected from external impacts and the like by the first frame 210. For this reason, the defective rate of the battery cell 100 can be reduced, and thus the manufacturing cost of the battery cell 100 can be saved.

[0234] [First Support Portion] The first support portion 214 may be disposed on the one side in the second direction of the first pressure prevention groove (H1) formed on the one side in the second direction of the first pressure surface (S1), or may be disposed on the other side in the second direction of the first pressure prevention groove (H1) formed on the other side in the second direction of the first pressure surface (S1).

[0235] The first support portion 214 can be coupled to the first base portion 212.

[0236] The first support portion 214 may face or contact one side surface or the other side surface of the battery cell 100 in the second direction. For example, the first support portion 214 may face or contact one side surface or the other side surface of the second housing portion 112b in the second direction.

[0237] Thereby, it is possible to prevent the battery cell 100 from moving in one or the other direction in the second direction or from detaching from the first frame 210 in one or the other direction in the second direction.

[0238] Also, although the battery case 110 is pressurized to fix the battery cell 100, the corner portions on one side or the other side of the battery case 110 in the second direction are not pressurized and fixed, and it is possible to prevent the battery cell 100 from moving in one or the other direction in the second direction or from detaching from the first frame 210 in one or the other direction in the second direction. The first frame 210 can be easily manufactured with a simple configuration and at a low cost.

[0239] The first support portion 214 may be in contact with one side surface of the second extending portion 114b in the first direction.

[0240] Through the first support portion 214, the first frame 210 can press and fix the second extending portion 114b of the battery cell 100 in the other direction in the first direction. At this time, as described above, through the first pressing surface (S1) of the first base portion 212, the first frame 210 can press and fix the second housing portion 112b of the battery cell 100 in the other direction in the first direction.

[0241] Thereby, since the first frame 210 presses both the second housing portion 112b and the second extending portion 114b of the battery cell 100 in the other direction in the first direction, the first frame 210 can stably fix the battery cell 100, and the battery case 110 can maintain its correct shape in a state where the electrode assembly 120 is accommodated inside the battery case 110.

[0242] In addition, the battery cell 100 can be stably fixed, and a first frame 210 that maintains the correct shape of the battery case 110 in a state where the electrode assembly 120 is accommodated inside the battery case 110 can be easily manufactured with a simple configuration and at a low cost.

[0243] The first support portions 214 can be provided in two numbers. The two first support portions 214 may be a first one-side support portion 214a and a first other-side support portion 214b (FIGS. 5 and 6). At this time, as described above, the first base portion 212 may include a pair of first pressure prevention grooves (H1).

[0244] The first one-side support portion 214a may be disposed on one side in the second direction of the first pressure prevention groove (H1) formed on one side in the second direction of the first pressure surface (S1) among the pair of first pressure prevention grooves (H1). The first one-side support portion 214a may be coupled to the first base portion 212 and face or contact one side surface of the battery cell 100 in the second direction (FIGS. 5 and 6).

[0245] The first other-side support portion 214b may be disposed on the other side in the second direction of the first pressure prevention groove (H1) formed on the other side in the second direction of the first pressure surface (S1) among the pair of first pressure prevention grooves (H1). The first other-side support portion 214b may be coupled to the first base portion 212 and face or contact the other side surface of the battery cell 100 in the second direction (FIGS. 5 and 6).

[0246] Thereby, it is possible to prevent the battery cell 100 from moving to one side and the other side in the second direction or detaching from the first frame 210 to one side and the other side in the second direction.

[0247] In addition, although the battery case 110 is pressed to fix the battery cell 100, both corner portions of the battery case 110 in the second direction are not pressed and fixed, and the battery cell 100 moves to one side and the other side in the second direction or detaches from the first frame 210 to one side and the other side in the second direction. The first frame 210 can be easily manufactured with a simple configuration and at a low cost.

[0248] [Second Frame] The second frame 220 may be arranged facing the first frame 210 via the battery cell 100. The second frame 220 may be arranged on the other side of the first frame 210 in the first direction.

[0249] The second frame 220 can be in contact with the other side surface (for example, the lower side surface) of the battery case 110 in the first direction, and press and fix the battery cell 100 in one direction (for example, upward) of the first direction.

[0250] Here, the other side surface of the battery case 110 in the first direction may be located on the other side in the first direction of the one side surface of the battery case 110 in the first direction described above. The same applies hereinafter.

[0251] Also, here, the pressing may include relative pressing. The same applies hereinafter. For example, when the first frame 210 or the like presses the battery cell 100 in the other direction of the first direction, even when the second frame 220 is fixed, the second frame 220 can relatively press the battery cell 100 in one direction of the first direction.

[0252] At this time, the second frame 220 is not in contact with the one side end portion (E3) or the other side end portion (E4) in the second direction among the other side surfaces of the battery case 110 in the first direction, and among the other side surfaces of the battery case 110 in the first direction, it is not necessary to press and fix the one side end portion (E3) or the other side end portion (E4) in the second direction in one direction of the first direction.

[0253] For example, the second frame 220 can be in contact with the other side surface in the first direction of the battery case 110, which forms the other side surface of the first case portion 110a of the battery case 110 in the first direction, and can press and fix the first accommodating portion 112a and the battery cell 100 in one direction of the first direction. At this time, the second frame 220 is not in contact with one end portion (E3) or the other end portion (E4) in the second direction of the other side surface in the first direction of the first accommodating portion 112a, and it is not necessary to press and fix one end portion (E3) or the other end portion (E4) in the second direction of the other side surface in the first direction of the first accommodating portion 112a in one direction of the first direction (FIGS. 5 and 6).

[0254] At this time, as described above, the first frame 210 is in contact with one side surface in the first direction of the battery case 110 and presses and fixes the battery cell 100 in the other direction of the first direction. However, the first frame 210 is not in contact with one end portion (E1) or the other end portion (E2) in the second direction intersecting the first direction of one side surface in the first direction of the battery case 110, and it is not necessary to press and fix one end portion (E1) or the other end portion (E2) in the second direction of one side surface in the first direction of the battery case 110 in the other direction of the first direction.

[0255] Thereby, the first frame 210 and the second frame 220 press the central portion in the second direction between the one side surface and the other side surface of the battery case 110 in the first direction, between the one end portions (E1, E3) and the other end portions (E2, E4) in the second direction, in the other direction and one direction of the first direction, so that the battery cell 100 can be stably fixed.

[0256] In addition, since the first frame 210 and the second frame 220 do not press one end portion (E1, E3) or the other end portion (E2, E4) in the second direction of one side surface and the other side surface of the battery case 110 in the first direction in the other direction and / or one direction of the first direction, although the corner portions on one side or the other side in the second direction of the battery case 110 are pressed by the first frame 210 and the second frame and deformed into an incorrect shape, after the pressing is interrupted, it is possible to prevent the battery case 110 from being deformed and restored to the original correct shape with difficulty.

[0257] Therefore, it is possible to prevent the occurrence of appearance defects in the battery case 110 due to the pressurization of the battery cell fixing device 200. For this reason, the defect rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0258] In particular, even when one of the first frame 210 and the second frame 220 is fixed and the fixed frame is relatively pressurized against the battery cell 100 by the pressurization of the other frame, the fixed first frame 210 or second frame 220 does not pressurize the corner portion on one side or the other side in the second direction of the battery case 110. Therefore, it is possible to prevent the occurrence of appearance defects in the battery case 110 due to the pressurization of the battery cell fixing device 200.

[0259] Further, the first frame 210 and the second frame 220 do not pressurize the one-side end portions (E1, E3) or the other-side end portions (E2, E4) in the second direction of one side surface and the other side surface of the battery case 110 in the other and / or one direction in the first direction. Therefore, even when the thickness of the battery case 110 increases, it is possible to prevent the occurrence of appearance defects in the battery case 110 due to the pressurization of the battery cell fixing device 200. For this reason, the occurrence of appearance defects can be prevented, and the durability of the battery case 110 can be improved.

[0260] Specifically considering this, it is as follows. As described above, generally, the greater the thickness of the battery case 110, the lower the degree to which the battery case 110 deformed by being pressurized with the same intensity of pressure can be restored to its original shape. However, in the present invention, since the first frame 210 and the second frame 220 do not pressurize the one-side end portions (E1, E3) or the other-side end portions (E2, E4) in the second direction of one side surface and the other side surface of the battery case 110 in the other and / or one direction in the first direction, even when the thickness of the battery case 110 increases, after the corner portion on one side or the other side in the second direction of the battery case 110 is pressurized and deformed by the first frame 210, the problem of non-restoration does not occur.

[0261] At this time, among one side surface of the battery case 110 in the first direction, whether the other end in the second direction of one end portion (E1) in the second direction that is not in contact with the first frame 210 and the other end in the second direction of one end portion (E3) in the second direction that is not in contact with the second frame 220 among the other side surface of the battery case 110 in the first direction intersect with the same virtual straight line (L1) extending in the first direction, or whether one end in the second direction of the other end portion (E2) in the second direction that is not in contact with the first frame 210 and one end in the second direction of the other end portion (E4) in the second direction that is not in contact with the second frame 220 among the other side surface of the battery case 110 in the first direction intersect with the same virtual straight line (L2) extending in the first direction (FIG. 5, FIG. 6).

[0262] Thereby, the boundary points at which the first frame 210 and the second frame 220 press one side surface and the other side surface of the battery case 110 toward the other and one in the first direction may correspond to each other. Therefore, since the regions in which the battery cell fixing device 200 can press one side surface and the other side surface of the battery case 110 correspond to each other, the battery cell fixing device 200 can stably fix the battery cell 100.

[0263] On the other hand, the length in the second direction of one end portion (E3) or the other end portion (E4) in the second direction that is not in contact with the second frame 220 among the other side surface of the battery case 110 in the first direction may be greater than or the same as 1 / 40 of the length in the second direction of the other side surface of the battery case 110 in the first direction, and may be less than or the same as 1 / 5.

[0264] For example, the length in the second direction of one end portion (E3) or the other end portion (E4) in the second direction that is not in contact with the second frame 220 among the other side surface of the first accommodating portion 112a in the first direction may be greater than or the same as 1 / 40 of the length in the second direction of the other side surface of the first accommodating portion 112a in the first direction, and may be less than or the same as 1 / 5.

[0265] The second frame 220 may include a second base portion 222. The second frame 220 may include a second support portion 224. Hereinafter, the second base portion 222 and the second support portion 224 will be considered.

[0266] [Second Base Portion] The second base portion 222 may be disposed on the other side of the battery cell 100 in the first direction.

[0267] The second base portion 222 may include a second pressing surface (S2) and a second pressure prevention groove (H2). The second base portion 222 may include a fourth pressure prevention groove (H4) (FIGS. 1 and 3).

[0268] The second pressing surface (S2) may be in contact with the other side surface of the battery case 110 in the first direction. For example, the second pressing surface (S2) may be in contact with the other side surface of the first accommodating portion 112a in the first direction.

[0269] Via the second pressing surface (S2), the second frame 220 can press and fix the battery cell 100 in one direction of the first direction. For example, via the second pressing surface (S2), the second frame 220 can press and fix the first accommodating portion 112a of the battery cell 100 in one direction of the first direction.

[0270] The second pressure prevention groove (H2) is formed on one side or the other side of the second pressing surface (S2) in the second direction, and may be recessed in the other direction of the first direction.

[0271] The second pressure prevention groove (H2) may face the one side end portion (E3) or the other side end portion (E4) in the second direction of the other side surface of the battery case 110 in the first direction. For example, the second pressure prevention groove (H2) may face the one side end portion (E3) or the other side end portion (E4) in the second direction of the other side surface of the first accommodating portion 112a in the first direction.

[0272] Due to the second pressure prevention groove (H2), the second frame 220 does not contact the one-side end (E3) or the other-side end (E4) in the second direction of the other side surface of the battery case 110 in the first direction, and it is not necessary to press and fix the one-side end (E3) or the other-side end (E4) in the second direction of the other side surface of the battery case 110 to one side in the first direction. For example, due to the second pressure prevention groove (H2), the second frame 220 does not contact the one-side end (E3) or the other-side end (E4) in the second direction of the other side surface of the first accommodation portion 112a in the first direction, and it is not necessary to press and fix the one-side end (E3) or the other-side end (E4) in the second direction of the other side surface of the first accommodation portion 112a to one side in the first direction.

[0273] Thus, although the battery case 110 is pressed to fix the battery cell 100, the second frame 220 that does not press and fix the corner portion on one side or the other side in the second direction of the battery case 110 can be easily manufactured with a simple structure and at a low cost.

[0274] In addition, the second pressure prevention groove (H2) of the second frame 220 is formed so as to face the corner portion on one side or the other side in the second direction of the battery case 110. Thus, even if the corner portion on one side or the other side in the second direction of the battery case 110 is not pressed and fixed by the second frame 220, it can be covered by the second frame 220. For this reason, the corner portion on one side or the other side in the second direction of the battery case 110 that is not pressed and fixed by the second frame 220 can also be protected from external impacts and the like by the second frame 220. For this reason, the defective rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0275] On the other hand, the second frame 220 does not contact the one-side end (E3) and the other-side end (E4) in the second direction of the other side surface of the battery case 110 in the first direction, and it is not necessary to press and fix the one-side end (E3) and the other-side end (E4) in the second direction of the other side surface of the battery case 110 to one side in the first direction.

[0276] Specifically, the second base portion 222 may include a pair of second pressure prevention grooves (H2). The pair of second pressure prevention grooves (H2) are respectively formed on one side and the other side in the second direction of the second pressure surface (S2), and may be respectively recessed in the other direction in the first direction. The pair of second pressure prevention grooves (H2) may respectively face the one-side end portion (E3) and the other-side end portion (E4) in the second direction among the other-side surfaces of the battery case 110 in the first direction.

[0277] At this time, the second frame 220 does not contact the one-side end portion (E3) and the other-side end portion (E4) in the second direction among the other-side surfaces of the battery case 110 in the first direction by the pair of second pressure prevention grooves (H2), and it is not necessary to press and fix the one-side end portion (E3) and the other-side end portion (E4) in the second direction among the other-side surfaces of the battery case 110 in the first direction to one side in the first direction.

[0278] Thereby, since the second frame 220 does not press the one-side end portion (E3) and the other-side end portion (E4) in the second direction among the other-side surfaces of the battery case 110 in the first direction, although both corner portions in the second direction of the battery case 110 are pressed by the second frame 220 and deformed into an incorrect shape, after the pressure is interrupted, it is possible to prevent both from being difficult to restore to the original correct shape and being deformed. Therefore, it is possible to prevent the occurrence of appearance defects of the battery case 110 due to the pressure of the battery cell fixing device 200. For this reason, the defective rate of the battery cell 100 can be reduced, and the manufacturing cost of the battery cell 100 can be saved.

[0279] Also, although the battery case 110 is pressed to fix the battery cell 100, the second frame 220 that does not press and fix both corner portions in the second direction of the battery case 110 can be easily manufactured with a simple configuration and at a low cost.

[0280] Further, since the pair of second pressure prevention grooves (H2) of the second frame 220 are formed to face both corner portions in the second direction of the battery case 110, even if both corner portions in the second direction of the battery case 110 are not pressure-fixed by the second frame 220, they can all be covered by the second frame 220. For this reason, both corner portions in the second direction of the battery case 110 that are not pressure-fixed by the second frame 220 can also be protected from external impacts and the like by the second frame 220. For this reason, the defect rate of the battery cell 100 can be lowered, and thus the manufacturing cost of the battery cell 100 can be reduced.

[0281] When the other side surface of the battery case 110 in the first direction extends in the third direction, the second pressure surface (S2) and the second pressure prevention groove (H2) may extend in the third direction along the other side surface of the battery case 110 in the first direction (FIGS. 1 to 4).

[0282] For example, when the other side surface of the first accommodating portion 112a in the first direction extends in the third direction, the second pressure surface (S2) and the second pressure prevention groove (H2) may extend in the third direction along the other side surface of the first accommodating portion 112a in the first direction (FIGS. 1 to 4).

[0283] Although the fourth pressure prevention groove (H4) is formed on one side or the other side in the third direction of the second pressure surface (S2), it may be recessed and formed in the other direction in the first direction.

[0284] The fourth pressure prevention groove (H4) may face one end or the other end in the third direction of the other side surface of the battery case 110 in the first direction in the first direction. For example, the fourth pressure prevention groove (H4) may face one end or the other end in the third direction of the other side surface of the first accommodating portion 112a in the first direction in the first direction.

[0285] Due to the fourth pressure prevention groove (H4), the second frame 220 does not contact the one side end or the other side end in the third direction of the other side surface of the battery case 110 in the first direction, and it is not necessary to press and fix the one side end or the other side end in the third direction of the other side surface of the battery case 110 to one side in the first direction. For example, due to the fourth pressure prevention groove (H4), the second frame 220 does not contact the one side end or the other side end in the third direction of the other side surface of the first accommodating portion 112a in the first direction, and it is not necessary to press and fix the one side end or the other side end in the third direction of the other side surface of the first accommodating portion 112a to one side in the first direction.

[0286] Thereby, since the second frame 220 does not press one side end or the other side end in the third direction of one side surface of the battery case 110 to one side in the first direction, although the corner portion on one side or the other side in the third direction of the battery case 110 is pressed by the second frame and deformed into an incorrect shape, after the pressure is interrupted, it can be prevented from being difficult to restore to the original correct shape and being deformed.

[0287] Also, the corner portion on one side or the other side in the third direction of the battery case 110 can be covered by the second frame 220 even without being press-fixed by the second frame 220. Therefore, the corner portion on one side or the other side in the third direction of the battery case 110 that is not press-fixed by the second frame 220 can also be protected from external impacts and the like by the second frame 220. For this reason, the defective rate of the battery cell 100 can be lowered, and thus the manufacturing cost of the battery cell 100 can be reduced.

[0288] [Second Support Portion] The second support portion 224 may be disposed on one side in the second direction of the second pressure prevention groove (H2) formed on one side in the second direction of the second pressure surface (S2), or may be disposed on the other side in the second direction of the second pressure prevention groove (H2) formed on the other side in the second direction of the second pressure surface (S2).

[0289] The second support portion 224 can be coupled to the second base portion 222.

[0290] The second support portion 224 may face or be in contact with one side surface or the other side surface of the battery cell 100 in the second direction. For example, the second support portion 224 may face or be in contact with one side surface or the other side surface of the first accommodating portion 112a in the second direction.

[0291] The second support portion 224 may be in contact with the other side surface of the first extending portion 114a in the first direction.

[0292] The second frame 220 can press and fix the first extending portion 114a of the battery cell 100 to one side in the first direction via the second support portion 224.

[0293] The second support portion 224 may be in contact with the first support portion 214 of the first frame 210 in the first direction.

[0294] Two second support portions 224 may be provided. The two second support portions 224 may be a second one-side support portion 224a and a second other-side support portion 224b (FIGS. 5 and 6). At this time, as described above, the second base portion 222 may include a pair of second pressure prevention grooves (H2).

[0295] The second one-side support portion 224a may be disposed on one side in the second direction of the second pressure prevention groove (H2) formed on one side in the second direction of the second pressure surface (S2) among the pair of second pressure prevention grooves (H2). The second one-side support portion 224a may be coupled to the second base portion 222 and may face or be in contact with one side surface of the battery cell 100 in the second direction (FIGS. 5 and 6).

[0296] The second other-side support portion 224b may be disposed on the other side in the second direction of the second pressure prevention groove (H2) formed on the other side in the second direction of the second pressure surface (S2) among the pair of second pressure prevention grooves (H2). The second other-side support portion 224b may be coupled to the second base portion 222 and may face or be in contact with the other side surface of the battery cell 100 in the second direction (FIGS. 5 and 6).

[0297] On the other hand, matters related to the first frame 220, the first base portion 212, and the first support portion 214 can be analogously applied to the second frame 220, the second base portion 222, and the second support portion 224.

[0298] It must be understood that all of the above-described embodiments are illustrative and not restrictive, and the scope of the present invention is indicated by the claims described below rather than the above detailed description. And, of course, all changes and deformable forms conceivable from the equivalent concepts of the meaning and scope of the claims described below should be construed as being included in the scope of the present invention.

[0299] As described above, the present invention has been described with reference to the exemplary drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, and it is obvious that various modifications can be made by those of ordinary skill in the art within the scope of the technical idea of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

Explanation of Reference Numerals

[0300] 100 Battery cell 110 Battery case 110a First case portion 110b Second case portion 112a First accommodating portion 112b Second accommodating portion 114a First extending portion 114b Second extending portion 120 Electrode assembly 122 Terminal 200 Battery cell fixing device 210 First frame 220 Second frame 212 First base portion 222 Second base portion 214 First support portion 224 Second support portion S1 First pressing surface S2 Second pressing surface H1 First pressure prevention groove H2 Second pressure prevention groove H3 Third pressure prevention groove H4 Fourth pressure prevention groove

Claims

1. In a battery cell fixing device for fixing a battery cell including a battery case and an electrode assembly housed inside the battery case, a first frame that contacts one side surface of the battery case in a first direction, presses and fixes the battery cell in the other direction of the first direction, does not contact one end or the other end in a second direction intersecting the first direction among one side surface of the battery case in the first direction, and does not press and fix one end or the other end in the second direction of one side surface of the battery case in the first direction in the other direction of the first direction is included. A battery cell fixing device.

2. A second frame that is disposed facing the first frame through the battery cell, contacts the other side surface of the battery case in the first direction located on the other side in the first direction of one side surface of the battery case in the first direction, presses and fixes the battery cell in one direction of the first direction, does not contact one end or the other end in the second direction among the other side surface of the battery case in the first direction, and does not press and fix one end or the other end in the second direction of the other side surface of the battery case in the first direction in one direction of the first direction is included. The battery cell fixing device according to Claim 1.

3. Whether the other end in the second direction of one end in the second direction that does not contact the first frame among one side surface of the battery case in the first direction and the other end in the second direction of one end in the second direction that does not contact the second frame among the other side surface of the battery case in the first direction intersect the same virtual straight line extending in the first direction, or the one end in the second direction of the other end in the second direction that does not contact the first frame among one side surface of the battery case in the first direction and the one end in the second direction of the other end in the second direction that does not contact the second frame among the other side surface of the battery case in the first direction intersect the same virtual straight line extending in the first direction. The battery cell fixing device according to Claim 2.

4. The first frame includes a first base portion disposed on one side of the battery cell in the first direction. The first base portion includes a first pressing surface that contacts one side surface of the battery case in the first direction, and a first pressing prevention groove that is formed on one side or the other side in the second direction of the first pressing surface, is recessed in one direction of the first direction, and faces one end or the other end in the second direction of one side surface of the battery case in the first direction in the first direction. The first frame presses and fixes the battery cell in the other direction of the first direction via the first pressing surface, but does not contact the one-side end or the other-side end in the second direction of the one-side surface of the battery case in the first direction due to the first pressing prevention groove, and does not press and fix the one-side end or the other-side end in the second direction of the one-side surface of the battery case in the other direction of the first direction. The second frame includes a second base portion disposed on the other side of the battery cell in the first direction. The second base portion has a second pressing surface that contacts the other-side surface of the battery case in the first direction, and is formed on one side or the other side in the second direction of the second pressing surface, but is recessed in the other direction of the first direction, and includes a second pressing prevention groove facing the one-side end or the other-side end in the second direction of the other-side surface of the battery case in the first direction. The second frame presses and fixes the battery cell in one direction of the first direction via the second pressing surface, but does not contact the one-side end or the other-side end in the second direction of the other-side surface of the battery case in the first direction due to the second pressing prevention groove, and does not press and fix the one-side end or the other-side end in the second direction of the other-side surface of the battery case in one direction of the first direction. The battery cell fixing device according to claim 2.

5. The first frame does not contact the one-side end and the other-side end in the second direction of the one-side surface of the battery case in the first direction, and does not press and fix the one-side end and the other-side end in the second direction of the one-side surface of the battery case in the other direction of the first direction. The first base portion is formed on one side and the other side in the second direction of the first pressing surface respectively, but is recessed in one direction of the first direction respectively, and includes a pair of the first pressing prevention grooves facing the one-side end and the other-side end in the second direction of the one-side surface of the battery case in the first direction respectively. The first frame does not contact the one-side end and the other-side end in the second direction of the one-side surface of the battery case in the first direction due to the pair of the first pressing prevention grooves, and does not press and fix the one-side end and the other-side end in the second direction of the one-side surface of the battery case in the other direction of the first direction. The second frame does not contact the one-side end and the other-side end in the second direction of the other-side surface of the battery case in the first direction, and does not press and fix the one-side end and the other-side end in the second direction of the other-side surface of the battery case in one direction of the first direction. The second base portion is formed on one side and the other side in the second direction of the second pressing surface, respectively, but is recessed in the other direction in the first direction, and includes a pair of the second pressure prevention grooves facing the one side end portion and the other side end portion in the second direction, respectively, of the other side surface of the battery case in the first direction. The second frame does not contact the one side end portion and the other side end portion in the second direction of the other side surface of the battery case in the first direction by the pair of the second pressure prevention grooves, and does not press and fix the one side end portion and the other side end portion in the second direction of the other side surface of the battery case in the one direction in the first direction. The battery cell fixing device according to claim 4.

6. The first frame includes a first base portion disposed on one side of the battery cell in the first direction. The first base portion includes a first pressing surface in contact with one side surface of the battery case in the first direction, and is formed to be recessed in one direction in the first direction, although it is formed on one side or the other side in the second direction of the first pressing surface, and includes a first pressure prevention groove facing the one side end portion or the other side end portion in the second direction of the one side surface of the battery case in the first direction in the first direction. The first frame presses and fixes the battery cell in the other direction in the first direction through the first pressing surface, but does not contact the one side end portion or the other side end portion in the second direction of the one side surface of the battery case in the first direction by the first pressure prevention groove, and does not press and fix the one side end portion or the other side end portion in the second direction of the one side surface of the battery case in the other direction in the first direction. The battery cell fixing device according to claim 1.

7. One side surface of the battery case in the first direction extends in a third direction intersecting the first direction and the second direction. The first pressing surface and the first pressure prevention groove extend in the third direction along one side surface of the battery case in the first direction. The battery cell fixing device according to claim 6.

8. The first base portion is formed on one side or the other side in the third direction intersecting the first direction and the second direction of the first pressing surface, but is formed to be recessed in one direction in the first direction, and includes a third pressure prevention groove facing the one side end portion or the other side end portion in the third direction of the one side surface of the battery case in the first direction in the first direction. The first frame presses and fixes the battery cell in the other direction of the first direction via the first pressing surface, but does not contact either the one-side end or the other-side end in the third direction of one side surface of the battery case in the first direction due to the third pressing prevention groove, and does not press and fix either the one-side end or the other-side end in the third direction of one side surface of the battery case in the other direction of the first direction. The battery cell fixing device according to claim 6.

9. The first frame does not contact either the one-side end or the other-side end in the second direction of one side surface of the battery case in the first direction, and does not press and fix either the one-side end or the other-side end in the second direction of one side surface of the battery case in the other direction of the first direction. The first base portion is formed on one side and the other side in the second direction of the first pressing surface, respectively, but is recessed in one direction of the first direction, and includes a pair of the first pressing prevention grooves facing the one-side end and the other-side end in the second direction of one side surface of the battery case in the first direction, respectively. The first frame does not contact either the one-side end or the other-side end in the second direction of one side surface of the battery case in the first direction due to the pair of the first pressing prevention grooves, and does not press and fix either the one-side end or the other-side end in the second direction of one side surface of the battery case in the other direction of the first direction. The battery cell fixing device according to claim 6.

10. The first frame is disposed on one side in the second direction of the first pressing prevention groove formed on one side in the second direction of the first pressing surface among the pair of the first pressing prevention grooves, is coupled to the first base portion, and includes a first one-side support portion facing or contacting the one-side surface of the battery cell in the second direction in the second direction; and is disposed on the other side in the second direction of the first pressing prevention groove formed on the other side in the second direction of the first pressing surface among the pair of the first pressing prevention grooves, is coupled to the first base portion, and includes a first other-side support portion facing or contacting the other-side surface of the battery cell in the second direction in the second direction. The battery cell fixing device according to claim 9.

11. The first frame is disposed on one side in the second direction of the first pressing prevention groove formed on one side in the second direction of the first pressing surface or on the other side in the second direction of the first pressing prevention groove formed on the other side in the second direction of the first pressing surface, is coupled to the first base portion, and includes a first support portion facing or contacting the one-side surface or the other-side surface of the battery cell in the second direction in the second direction. The battery cell fixing device according to claim 6.

12. The battery case includes a first case portion extending in a second direction, a first direction, and a third direction intersecting the second direction, and a second case portion disposed on one side of the first case portion in the first direction and covering the first case portion. The electrode assembly is accommodated between the first case portion and the second case portion. The first case portion includes a first accommodating portion and a first extending portion. The second case portion includes a second accommodating portion and a second extending portion. The first accommodating portion and the second accommodating portion face each other or are in contact with each other to form an accommodating space for accommodating the electrode assembly therein. The first extending portion and the second extending portion each extend outward from the first accommodating portion and the second accommodating portion, but extend at least in one or the other of the second direction from the first accommodating portion and the second accommodating portion, respectively, and at least partially surround the first accommodating portion and the second accommodating portion, respectively, and are joinable to each other. The second accommodating portion protrudes in one direction of the first direction from the second extending portion. The first pressing surface is in contact with one side surface of the second accommodating portion in the first direction. The first pressure prevention groove faces one end or the other end in the second direction of one side surface of the second accommodating portion in the first direction in the first direction. The first frame presses and fixes the second accommodating portion of the battery cell in the other direction of the first direction through the first pressing surface, but does not contact one end or the other end in the second direction of one side surface of the second accommodating portion due to the first pressure prevention groove, and does not press and fix one end or the other end in the second direction of one side surface of the second accommodating portion in the other direction of the first direction. The first support portion faces or is in contact with one side surface or the other side surface of the second accommodating portion in the second direction, and is in contact with one side surface of the second extending portion in the first direction. The first frame presses and fixes the second extending portion of the battery cell in the other direction of the first direction through the first support portion. The battery cell fixing device according to claim 11.

13. The battery case includes a first case portion extending in a second direction, a first direction, and a third direction intersecting the second direction, and a second case portion disposed on one side of the first case portion in the first direction and covering the first case portion. The electrode assembly is accommodated between the first case portion and the second case portion. The first case portion and the second case portion each include a first accommodating portion and a second accommodating portion that face each other or are in contact with each other to form an accommodating space for accommodating the electrode assembly therein. The width of the accommodation space in the second direction is larger than the width of the electrode assembly in the second direction. As a result, at least a part of one side end or the other side end in the second direction of one side surface of the second accommodation portion in the first direction is not supported in the first direction by the electrode assembly. The first frame is in contact with one side surface of the second accommodation portion in the first direction and presses and fixes the battery cell in the other direction of the first direction. However, it is not in contact with one side end or the other side end in the second direction of one side surface of the second accommodation portion in the first direction, and does not press and fix one side end or the other side end in the second direction of one side surface of the second accommodation portion in the other direction of the first direction. The battery cell fixing device according to claim 1.

14. One side end or the other side end of the second case portion in the second direction is connected to one side end or the other side end of the first case portion in the second direction, and other portions excluding one side end or the other side end in the second direction are separable from the first case portion, and are bent relative to the first case portion, face each other in the first direction with the first case portion, and cover the first case portion. The second accommodation portion has a concave shape for accommodating at least a part of the electrode assembly. As a result, a predetermined space forming at least a part of the accommodation space is defined. When the second case portion is bent relative to the first case portion with the electrode assembly disposed in the first accommodation portion, in order that the second accommodation portion does not interfere with the electrode assembly, the width of the predetermined space in the second direction of the accommodation space is larger than the width of the electrode assembly 120 in the second direction. As a result, at least a part of one side end or the other side end in the second direction of one side surface of the second accommodation portion in the first direction is not supported in the first direction by the electrode assembly. The battery cell fixing device according to claim 12.

15. The length in the second direction of one side end or the other side end in the second direction that is not in contact with the first frame of one side surface of the battery case in the first direction is larger than or the same as 1 / 40 of the length in the second direction of one side surface of the battery case in the first direction, and smaller than or the same as 1 / 5. The battery cell fixing device according to any one of claims 1 to 14.

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