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 June 20, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[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 appearance of a battery case of the battery cell from being deteriorated. [Background technology]

[0003] In general, a secondary battery is a battery that can be charged and discharged, unlike a primary battery that cannot be recharged. These secondary batteries are used not only in small, cutting-edge electronic devices such as mobile phones, PDAs, and laptops, but also as a power source for energy storage systems (ESS), electric vehicles (EVs), and hybrid electric vehicles (HEVs).

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

[0005] Meanwhile, when manufacturing pouch-type batteries (hereinafter referred to as battery cells), a battery cell fixing device is used to stably transport the battery cells to work areas for multiple processes, fix the battery cells in multiple processes to perform the required work, or ensure that the battery cell pouch (battery case) maintains the correct shape with the electrode assembly housed inside.

[0006] A battery cell fixing device can fix a battery cell by applying pressure to it. However, the battery cell pouch (battery case) may be deformed into an incorrect shape due to the pressure applied by the battery cell fixing device, and may not return to its original correct shape even after the pressure applied by the battery cell fixing device is stopped. This can result in poor appearance of the battery cell. Therefore, there is a need for a battery cell fixing device that can stably fix a battery cell and prevent poor appearance of the battery case of the battery cell.

[0007] The related prior art document is Korean Patent Publication No. 10-2017-0122149. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to provide a battery cell fixing device that stably fixes battery cells and prevents the appearance of the battery case of the battery cells from being deteriorated.

[0009] An object of the present invention is to provide a battery cell fixing device that prevents the appearance of a battery case from becoming poor even if the thickness of the battery case increases.

[0010] SUMMARY OF THE INVENTION An object of the present invention is to provide a battery cell fixing device that prevents the appearance of a battery case from being affected even if the width of the electrode assembly accommodation space in the battery case is greater than the width of the electrode assembly.

[0011] An object of the present invention is to provide a battery cell fixing device that has a simple structure, is inexpensive, and is easily manufactured.

[0012] An object of the present invention is to provide a battery cell fixing device that protects battery cells.

[0013] The technical object of the present invention is not limited to the above-mentioned objects, and other unmentioned objects and advantages of the present invention can be understood from the following description and can be more clearly understood from the examples of the present invention. Furthermore, it is clear that the objects and advantages of the present invention can be achieved by the means and combinations thereof set forth 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 housed inside the battery case 110, the battery cell fixing device including a first frame 210.

[0015] The first frame 210 contacts one side of the battery case 110 in the first direction and presses the battery cell 100 in the other direction in the first direction to fix it, but does not contact one end (E1) or the other end (E2) of the one side of the battery case 110 in the first direction in the second direction that intersects with the first direction, and does not press the one end (E1) or the other end (E2) of the one side of the battery case 110 in the first direction in the second direction to fix it.

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

[0017] The second frame 220 may be disposed to face the first frame 210 with the battery cell 100 interposed therebetween.

[0018] The second frame 220 contacts the other side surface of the battery case 110 in the first direction, which is located on the other side of one side surface of the battery case 110 in the first direction, and presses the battery cell 100 in one direction in the first direction to fix it, but 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 therefore it is not necessary to press 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 to fix it.

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

[0020] In an 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 pressure surface (S1) and a first pressure prevention groove (H1).

[0022] The first pressure 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) may be formed on one side or the other side of the first pressure surface (S1) in the second direction, but may be recessed on one side in the first direction and face one end (E1) or the other end (E2) in the second direction of one side surface of the first direction of the battery case 110 in the first direction.

[0024] Although the first frame 210 presses the battery cell 100 in the other direction in the first direction via the first pressure surface (S1) to fix it, the first frame 210 does not contact one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction due to the first pressure prevention groove (H1), and therefore it is not necessary to press the one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction in the other direction in the first direction to fix it.

[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) may be formed on one or the other side of the second pressure surface (S2) in the second direction, but may be recessed on the other side in the first direction and may face one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction in the first direction.

[0029] The second frame 220 presses the battery cell 100 in one direction in the first direction via the second pressure surface (S2) to fix it, but the second pressure prevention groove (H2) does not contact one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction, so it is not necessary to press one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction in the first direction to fix it.

[0030] In one embodiment, the first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction, and therefore, the one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction do not need to be pressed toward the other side in the first direction to fix them.

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

[0032] The pair of first pressure prevention grooves (H1) are formed on one side and the other side of the first pressure surface (S1) in the second direction, respectively, but may also be formed by recessing each on one side in the first direction.

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

[0034] The first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction due to the pair of first pressure prevention grooves (H1), so it is not necessary to pressurize and fix the one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction toward the other side in the first direction.

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

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

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

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

[0039] The second frame 220 does not contact one end (E3) and the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction due to the pair of second pressure prevention grooves (H2), and therefore it is not necessary to pressurize and fix one end (E3) and the other end (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.

[0040] In an 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 be in contact with one side surface of the battery case 110 in the first direction.

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

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

[0045] Although the first frame 210 presses the battery cell 100 in the other direction in the first direction via the first pressure surface (S1) to fix it, the first frame 210 does not contact one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction due to the first pressure prevention groove (H1), and therefore it is not necessary to press the one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction in the other direction in the first direction to fix it.

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

[0047] The first pressure surface (S1) and the first pressure prevention groove (H1) may extend in a third direction along 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) is formed on one side or the other side of the first pressure surface (S1) in a third direction intersecting the first and second directions, but may also be formed recessed on one side in the first direction.

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

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

[0052] In one embodiment, the first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction, and therefore, the one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction do not need to be pressed toward the other side in the first direction to fix them.

[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 formed on one side and the other side of the first pressure surface (S1) in the second direction, respectively, but may also be formed by recessing each on one side in the first direction.

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

[0056] The first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction due to the pair of first pressure prevention grooves (H1), so it is not necessary to pressurize and fix the one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction toward the other side in 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 portion 214a may be disposed on one side in the second direction of the first anti-pressure groove (H1) formed on one side in the second direction of the first pressure surface (S1) among the pair of first anti-pressure grooves (H1).

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

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

[0061] The first external support portion 214b may be arranged on the other side in the second direction of the first anti-pressure groove (H1) of the pair of first anti-pressure grooves (H1) formed on the other side in the second direction of the first pressure surface (S1).

[0062] The first external support portion 214b may be coupled to the first base portion 212.

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

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

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

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

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

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

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

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

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

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

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

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

[0075] The first receiving portion 112a and the second receiving portion 112b may face or contact each other to form a receiving space AS in which the electrode assembly 120 is received.

[0076] The first extension portion 114a and the second extension portion 114b extend outward from the first accommodating portion 112a and the second accommodating portion 112b, respectively, but may also extend from the first accommodating portion 112a and the second accommodating portion 112b, respectively, in at least one or the other of the second directions.

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

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

[0079] The second accommodating portion 112b may protrude further in one direction than the second extending portion 114b.

[0080] The first pressure 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 one end (E1) or the other end (E2) in the second direction of one side surface in the first direction of the second receiving portion 112b.

[0082] Although the first frame 210 presses and fixes the second accommodating portion 112b of the battery cell 100 in the other direction in the first direction via the first pressure surface (S1), the first pressure prevention groove (H1) does not contact one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction, and therefore it is not necessary to press and fix one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodating portion 112b in the other direction 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 receiving 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 may press the second extending portion 114b of the battery cell 100 in the other direction in the first direction via the first supporting portion 214 to fix the second extending portion 114b.

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

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

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

[0089] The electrode assembly 120 may be housed 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 include a first receiving portion 112a and a second receiving portion 112b, respectively.

[0091] The first receiving portion 112a and the second receiving portion 112b may face or contact each other to form a receiving space AS in which the electrode assembly 120 is received.

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

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

[0094] The first frame 210 contacts one side surface of the second accommodating portion 112b in the first direction and presses the battery cell 100 in the other direction in the first direction to fix it, 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, so it is not necessary to press 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 to fix it.

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

[0096] The second case part 110b is separable from the first case part 110a at a portion other than one end or the other end in the second direction.

[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 receiving portion 112b may have a recessed shape to receive at least a portion of the electrode assembly 120 therein.

[0099] This makes it possible to define a predetermined space (PS2) that forms at least a part of the accommodation space (AS).

[0100] When the electrode assembly 120 is disposed in the first accommodating portion 112a and the second case portion 110b is bent relative to the first case portion 110a, the width (W1') in the second direction of the specified space (PS2) of the accommodating 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.

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

[0102] In one embodiment, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction of one side of the battery case 110 in the first direction that is not in contact with the first frame 210 may be greater than or equal to 1 / 40 of the length in the second direction of one side of the battery case 110 in the first direction, and may be less than or equal to 1 / 5. [Effects 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 may include a first frame 210 that contacts one side surface of the battery case 110 in a first direction and presses the battery cell 100 in the other direction in the first direction to fix it, but does not contact one end portion (E1) or the other end portion (E2) of the one side surface of the battery case 110 in the first direction in a second direction that intersects with the first direction, and does not press the one end portion (E1) or the other end portion (E2) of the one side surface of the battery case 110 in the second direction in the other direction in the first direction to fix it.

[0104] As a result, the first frame 210 applies pressure to the other side in the first direction to a central portion in the second direction between one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction, thereby stably fixing the battery cell 100. As a result, i) the battery cell 100 can be stably transported to a work area for one or more processes, ii) predetermined work can be smoothly performed in one or more processes with the battery cell 100 stably fixed, and iii) the correct shape of the battery case 110 can be stably maintained with the electrode assembly 120 housed inside the battery case 110.

[0105] Furthermore, because the first frame 210 does not press one end (E1) or the other end (E2) in the second direction of one side of the battery case 110 in the first direction toward the other side in the first direction, it is possible to prevent corner portions of one or the other side of the battery case 110 in the second direction from being deformed into an incorrect shape when pressed by the first frame 210 and from being difficult to restore to their original correct shape after the pressing is stopped. In particular, when the corner portions of the battery case 110 are pressed by the battery cell fixing device 200, they may be deformed into an incorrect shape due to design tolerances, assembly tolerances, or alignment errors of the battery cells 100 or the battery cell fixing device 200, and from being difficult to restore to their original correct shape. Therefore, it is preferable not to press the corner portions of the battery case 110 against the battery cell fixing device 200.

[0106] This prevents the appearance of the battery case 110 from being deteriorated due to pressure from the battery cell fixing device 200. This reduces the defective rate of the battery cells 100, and reduces the manufacturing costs of the battery cells 100.

[0107] Furthermore, the first frame 210 does not apply pressure to one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction, so even if the thickness of the battery case 110 increases, it is possible to prevent the appearance of the battery case 110 from being deteriorated by pressure from the battery cell fixing device 200. This prevents the appearance from being deteriorated and improves the durability of the battery case 110.

[0108] According to an embodiment of the present invention, the battery cell fixing device may include a second frame 220 that is arranged facing the first frame 210 via the battery cell 100, and that contacts the other side surface in the first direction of the battery case 110 that is located on the other side in the first direction of one side surface in the first direction of the battery case 110, thereby pressing the battery cell 100 in one direction in the first direction to fix it, but that does not contact 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 battery case 110, and does not press 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 battery case 110 to fix it.

[0109] As a result, the first frame 210 and the second frame 220 pressurize the center portion in the second direction between one side end (E1, E3) and the other side end (E2, E4) in the second direction of one side and the other side of the battery case 110 in the first direction, so that the battery cell 100 can be stably fixed.

[0110] Furthermore, since the first frame 210 and the second frame 220 do not pressurize the one side end (E1, E3) or the other side end (E2, E4) in the second direction of one side and the other side of the battery case 110 in the first direction toward one side and / or the other in the first direction, it is possible to prevent the corner portions of one side or the other in the second direction of the battery case 110 from being deformed into an incorrect shape when pressed by the first frame 210 and the second frame, and from being difficult to restore to their original correct shape after the pressing is stopped.

[0111] This prevents the appearance of the battery case 110 from being deteriorated due to pressure from the battery cell fixing device 200. This reduces the defective rate of the battery cells 100, and reduces the manufacturing costs of the battery cells 100.

[0112] In particular, even when either the first frame 210 or the second frame 220 is fixed and the fixed frame presses the battery cell 100 relatively by applying pressure to the other frame, the fixed first frame 210 or second frame 220 does not pressurize the corner portions on one or the other side of the second direction of the battery case 110, thereby preventing poor appearance of the battery case 110 due to pressure applied by the battery cell fixing device 200.

[0113] Furthermore, the first frame 210 and the second frame 220 do not pressurize one end (E1, E3) or the other end (E2, E4) in the second direction of one side surface in the first direction and the other side surface of the battery case 110 in the other direction in the first direction, so even if the thickness of the battery case 110 increases, it is possible to prevent the appearance of the battery case 110 from being deteriorated by the pressure of the battery cell fixing device 200. This prevents the appearance from being deteriorated and improves the durability of the battery case 110.

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

[0115] As a result, the first frame 210 and the second frame 220 may have boundary points that pressurize one side surface and the other side surface of the battery case 110 in the first direction toward one side and the other side in the first direction, respectively, that correspond to each other. Therefore, the battery cell fixing device 200 can stably fix the battery cells 100 because the regions that can pressurize one side surface and the other side surface of the battery case 110 in the first direction correspond to each other.

[0116] According to an embodiment of the present invention, the first frame 210 may include a first base portion 212 disposed on one side in the first direction of the battery cell 100. The first base portion 212 may include a first pressure surface (S1) that contacts one side of the battery case 110 in the first direction and a first pressure prevention groove (H1) that is formed on one side or the other side in the second direction of the first pressure surface (S1) but is recessed on one side in the first direction and faces one end (E1) or the other end (E2) in the second direction of the one side of the battery case 110 in the first direction. The first frame 210 presses the battery cell 100 in the other direction in the first direction via the first pressure surface (S1) to fix it, but the first pressure prevention groove (H1) does not contact one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction, so it is not necessary to press one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction in the other direction in the first direction to fix it. The second frame 220 may include a second base portion 222 arranged on the other side of the battery cell 100 in the first direction. The second base portion 222 may include a second pressure surface (S2) that contacts the other side surface of the battery case 110 in the first direction, and a second pressure prevention groove (H2) that is formed on one side or the other side of the second pressure surface (S2) in the second direction but is recessed in the other side of the first direction and faces in the first direction one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction. The second frame 220 presses and fixes the battery cells 100 in one direction in the first direction via the second pressure surface (S2), but does not contact the one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction due to the second pressure prevention groove (H2), so it is not necessary to press and fix the one end (E3) or the other end (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.

[0117] This allows the first frame 210 and the second frame 220, which fix the battery cells 100 by applying pressure to both sides of the battery case 110 in the first direction, but do not fix the battery cells 100 by applying pressure to the corners on one or the other side of the battery case 110 in the second direction, to be easily manufactured with a simple structure and at low cost.

[0118] In addition, the first anti-pressure groove (H1) and the second anti-pressure groove (H2) of the first frame 210 and the second frame 220 are formed to face corner portions on one or the other side of the battery case 110 in the second direction, so that corner portions on one or the other side of the battery case 110 in the second direction can be covered by the first frame 210 and the second frame 220 even if they are not pressed and fixed by the first frame 210 and the second frame 220. Therefore, corner portions on one or the other side of the battery case 110 in the second direction that are not pressed and fixed by the first frame 210 and the second frame 220 can also be protected from external impacts by the first frame 210 and the second frame 220. As a result, the defective rate of the battery cells 100 can be reduced, and the manufacturing costs of the battery cells 100 can be reduced.

[0119] According to an embodiment of the present invention, the first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110, and therefore the one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110 do not need to be pressed toward the other side in the first direction to fix the one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110. The first base portion 212 is formed on one side and the other side in the second direction of the first pressing surface (S1), respectively, but may be recessed toward one side in the first direction and may include a pair of first pressure prevention grooves (H1) facing the one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110, respectively, in the first direction. The first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction due to the pair of first pressure prevention grooves (H1), so the one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction do not need to be pressed toward the other side in the first direction to fix the battery case 110. The second frame 220 does not contact one end (E3) and the other end (E4) in the second direction of one side surface of the battery case 110 in the first direction, so the one end (E3) and the other end (E4) in the second direction of one side surface of the battery case 110 in the first direction do not need to be pressed toward one side in the first direction to fix the battery case 110. The second base portions 222 are formed on one side and the other side of the second pressure surface (S2) in the second direction, respectively, but may be recessed in the other side of the first direction and may include a pair of second pressure prevention grooves (H2) that face, in the first direction, one end (E3) and the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction. The second frame 220 is not in contact with the one end (E3) and the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction due to the pair of second pressure prevention grooves (H2), and therefore the one end (E3) and the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction do not need to be pressed toward one side in the first direction to fix them.

[0120] As a result, the first frame 210 and the second frame 220 do not pressurize the one end (E3) and the other end (E4) in the second direction of one side and the other side of the battery case 110 in the first direction toward the other side and the other side in the first direction, respectively. This prevents both corners of the battery case 110 in the second direction from being pressed by the first frame 210 and the second frame 220 and being deformed into an incorrect shape, but from being difficult to restore to their original correct shape after the pressure is stopped. This prevents the appearance of the battery case 110 from being poorly formed due to the pressure of the battery cell fixing device 200. This reduces the defective rate of the battery cells 100 and can reduce the manufacturing costs of the battery cells 100.

[0121] In addition, the first frame 210 and the second frame 220 can be easily manufactured with a simple structure and at low cost, in which the battery case 110 is pressurized to fix the battery cells 100 but both corner portions of the battery case 110 in the second direction are not pressurized to fix them.

[0122] In addition, the pair of first anti-pressure grooves (H1) and the pair of second anti-pressure grooves (H2) of the first frame 210 and the second frame 220 are formed to face both corners in the second direction of the battery case 110. Therefore, even if both corners in the second direction of the battery case 110 are not pressurized and fixed by the first frame 210 and the second frame 220, they can be covered by the first frame 210 and the second frame 220. Therefore, both corners in the second direction of the battery case 110 that are not pressurized and fixed by the first frame 210 and the second frame 220 can be protected from external impacts by the first frame 210 and the second frame 220. As a result, the defective rate of the battery cells 100 can be reduced, and the manufacturing costs of the battery cells 100 can be reduced.

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

[0124] This allows the first frame 210, which applies pressure to the battery case 110 to fix the battery cells 100 but does not apply pressure to the corners on one or the other side of the battery case 110 in the second direction, to be easily manufactured with a simple structure and at low cost.

[0125] In addition, the first anti-pressure groove (H1) of the first frame 210 is formed to face a corner portion on one or the other side of the battery case 110 in the second direction, so that the corner portion on one or the other side of the battery case 110 in the second direction can be covered by the first frame 210 even if it is not pressed and fixed by the first frame 210. Therefore, the corner portion on one or the other side of the battery case 110 in the second direction that is not pressed and fixed by the first frame 210 can also be protected from external impact by the first frame 210. Therefore, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be reduced.

[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 intersecting the first and second directions. The first pressure surface (S1) and the first pressure 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 on one or the other side of the battery case 110 in the second direction, to which one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction belongs, extends in the third direction, the corner on one or the other side of the battery case 110 in the second direction, which extends in the third direction, can be prevented from being pressed by the first frame 210. As a result, even if the corner on one or the other side of the battery case 110 in the second direction is deformed into an incorrect shape, it is possible to prevent the deformation from being difficult to restore. Therefore, it is possible to prevent the appearance of the battery case 110 from being deteriorated due to the pressure of the battery cell fixing device 200. As a result, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be reduced.

[0128] According to an embodiment of the present invention, the first base portion 212 is formed on one side or the other side of the first pressure surface (S1) in a third direction intersecting the first and second directions, but may include a third pressure prevention groove (H3) recessed into one side in the first direction and facing one end or the other end in the third direction of one side surface in the first direction of the battery case 110 in the first direction. The first frame 210 presses and fixes the battery cells 100 in the other side in the first direction via the first pressure surface (S1), but the third pressure prevention groove (H3) does not contact one end or the other end in the third direction of one side surface in the first direction of the battery case 110, so it is not necessary to press and fix one end or the other end in the third direction of one side surface in the first direction of the battery case 110 in the other side in the first direction.

[0129] As a result, the first frame 210 does not pressurize one end or the other end in the third direction of one side of the battery case 110 in the first direction toward the other side in the first direction, so that although the corner portions of one or the other side in the third direction of the battery case 110 are pressed by the first frame 210 and deformed into an incorrect shape, it is difficult for the corner portions to return to their original correct shape after the pressure is stopped, and this deformation can be prevented.

[0130] In addition, corner portions of one or the other side of the battery case 110 in the third direction may be covered by the first frame 210 even if they are not pressed and fixed by the first frame 210. Therefore, the corner portions of one or the other side of the battery case 110 in the third direction that are not pressed and fixed by the first frame 210 can also be protected from external impacts by the first frame 210. Therefore, the defective rate of the battery cells 100 may be reduced, and the manufacturing cost of the battery cells 100 may be reduced.

[0131] According to an embodiment of the present invention, the first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110, and therefore the one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110 do not need to be pressed toward the other side in the first direction to fix the one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110. The first base portion 212 is formed on one side and the other side in the second direction of the first pressing surface (S1), respectively, but may be recessed toward one side in the first direction and may include a pair of first pressure prevention grooves (H1) facing the one end (E1) and the other end (E2) in the second direction of one side surface in the first direction of the battery case 110, respectively, in the first direction. The first frame 210 is not in contact with one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction due to a pair of first pressure prevention grooves (H1), and therefore it is not necessary to pressurize and fix the one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction in the other direction in the first direction.

[0132] As a result, the first frame 210 does not press one end (E1) and the other end (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, so that both corners of the battery case 110 in the second direction are pressed by the first frame 210 and deformed into an incorrect shape, but it is difficult for the battery case 110 to return to its original correct shape after the pressure is stopped. Therefore, it is possible to prevent the appearance of the battery case 110 from being deteriorated due to the pressure of the battery cell fixing device 200. As a result, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be saved.

[0133] In addition, the first frame 210, which pressurizes the battery case 110 to fix the battery cells 100 but does not pressurize and fix both corner portions of the battery case 110 in the second direction, can be easily manufactured with a simple configuration and at low cost.

[0134] In addition, since the pair of first anti-pressure grooves (H1) of the first frame 210 are formed to face both corners in the second direction of the battery case 110, even if both corners in the second direction of the battery case 110 are not pressed and fixed by the first frame 210, they can all be covered by the first frame 210. Therefore, both corners in the second direction of the battery case 110 that are not pressed and fixed by the first frame 210 can also be protected from external impacts by the first frame 210. This can reduce the defective rate of the battery cells 100, thereby reducing the manufacturing cost of the battery cells 100.

[0135] According to an embodiment of the present invention, the first frame 210 may include a first one-side support portion 214a disposed on one side in the second direction of one of the pair of first anti-pressure grooves (H1) formed on one side in the second direction of the first pressing surface (S1), coupled to the first base portion 212, and facing or in contact with one side of the second direction of the battery cell 100, and a first other-side support portion 214b disposed on the other side in the second direction of the one of the pair of first anti-pressure grooves (H1) formed on the other side in the second direction of the first pressing surface (S1), coupled to the first base portion 212, and facing or in contact with the other side of the second direction of the battery cell 100.

[0136] This makes it possible to prevent the battery cells 100 from moving in either direction in the second direction or from separating from the first frame 210 in either direction in the second direction.

[0137] In addition, the first frame 210 can be easily manufactured with a simple structure and at low cost, in which the battery case 110 is pressurized to fix the battery cells 100 but both corner portions of the battery case 110 in the second direction are not pressurized to fix the battery cells 100, and the first frame 210 is prevented 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.

[0138] According to an embodiment of the present invention, the first frame 210 may include a first support part 214 that is disposed on one side in the second direction of a first anti-pressure 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 anti-pressure groove (H1) formed on the other side in the second direction of the first pressure surface (S1), and is coupled to the first base part 212 to face or contact one side or the other side of the battery cell 100 in the second direction.

[0139] This makes it possible to prevent the battery cell 100 from moving in one or the other direction in the second direction or from separating from the first frame 210 in one or the other direction in the second direction.

[0140] In addition, the first frame 210 can be easily manufactured with a simple structure and at low cost, in which the battery case 110 is pressurized to fix the battery cells 100 but the corner portions on one or the other side of the battery case 110 in the second direction are not pressurized to fix the battery cells 100, and the first frame 210 is prevented 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.

[0141] According to an embodiment of the present invention, the battery case 110 may include a first case portion 110a extending in a second direction and a third direction intersecting the first and second directions, 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 may be accommodated between the first case portion 110a and the second case portion 110b. The first case portion 110a may include a first receiving portion 112a and a first extending portion 114a. The second case portion 110b may include a second receiving portion 112b and a second extending portion 114b. The first receiving portion 112a and the second receiving portion 112b may face or contact each other to form an accommodation space (AS) in which the electrode assembly 120 is accommodated. The first extension portion 114a and the second extension portion 114b extend outward from the first accommodating portion 112a and the second accommodating portion 112b, respectively, but also extend from the first accommodating portion 112a and the second accommodating portion 112b in at least one or the other of the second directions, respectively, to at least partially surround the first accommodating portion 112a and the second accommodating portion 112b, respectively, and can be joined to each other. The second accommodating portion 112b may protrude in one direction of the first direction beyond the second extension portion 114b. The first pressure application surface (S1) may contact one side surface of the second accommodating portion 112b in the first direction. The first pressure prevention groove (H1) may face one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction. The first frame 210 presses the second accommodating portion 112b of the battery cell 100 in the other direction in the first direction via the first pressure surface (S1), but the first pressure prevention groove (H1) prevents the first frame 210 from contacting the one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction. Therefore, the one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodating portion 112b in the first direction does not have to be pressed in the other direction in the first direction to fix the battery cell 100. The first support portion 214 may face or contact the one or the other side surface of the second accommodating portion 112b in the second direction and may be in contact with the one side surface of the second extension portion 114b in the first direction. The first frame 210 can press the second extension portion 114b of the battery cell 100 in the other direction in the first direction via the first support portion 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 in the other direction of the first direction, so that the first frame 210 can stably fix the battery cell 100 and the battery case 110 can maintain the correct shape when the electrode assembly 120 is accommodated inside the battery case 110.

[0143] In addition, the first frame 210, which can stably fix the battery cells 100 and enable the battery case 110 to maintain the correct shape when the electrode assembly 120 is housed inside the battery case 110, can be easily manufactured with a simple structure and at 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 and a third direction intersecting the first and second directions, 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 may 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 include a first receiving portion 112a and a second receiving portion 112b facing or in contact with each other to form an accommodation space (AS) in which the electrode assembly 120 is accommodated. The width (W1) in the second direction of the accommodation space (AS) is larger than the width (W2) in the second direction of the electrode assembly 120, so that at least a portion of one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodation portion 112b in the first direction does not need to be supported in the first direction by the electrode assembly 120. The first frame 210 contacts the one side surface of the second accommodation portion 112b in the first direction to pressurize the battery cell 100 in the other direction in the first direction, but does not contact the one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodation portion 112b in the first direction, so that the one end (E1) or the other end (E2) in the second direction of one side surface of the second accommodation portion 112b in the first direction does not need to be pressed in the other direction in the first direction to fix it.

[0145] As a result, even if at least a portion of one side end (E1) or the other side end (E2) in the second direction of one side surface in the first 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 pressurize the corner of one side or the other side in the second direction of the second accommodating portion 112b in the other direction in the first direction, thereby preventing poor appearance of the battery case 110 due to pressure from the battery cell fixing device 200.

[0146] According to an embodiment of the present invention, one or the other end of the second case portion 110b in the second direction is connected to one or the other end of the first case portion 110a in the second direction, and other portions of the second case portion 110b other than the one or the other end of the second direction are separable from the first case portion 110a and may be bent relative to the first case portion 110a to face each other in the first direction and cover the first case portion 110a. The second receiving portion 112b has a recessed shape to receive at least a portion of the electrode assembly 120, thereby defining a predetermined space PS2 that forms at least a portion of the receiving space AS. When the electrode assembly 120 is disposed in the first accommodating portion 112a and the second case portion 110b is bent relative to the first case portion 110a, the width (W1') in the second direction of a predetermined space (PS2) in the accommodating space (AS) is greater 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, at least a portion of one side end (E1) or the other side end (E2) in the second direction of one side surface in the first direction of the second accommodating portion 112b does not need to be supported in the first direction by the electrode assembly 120.

[0147] As a result, 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 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 portion of the corners on one or the other side of the second direction of the second accommodating portion 112b are not supported in the first direction by the electrode assembly 120, the first frame 210 does not pressurize the corners on one or the other side of the second direction of the second accommodating portion 112b in the other direction in the first direction, and therefore, it is possible to prevent poor appearance of the battery case 110 due to pressure applied by 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 of one side of the battery case 110 in the first direction that is not in contact with the first frame 210 may be greater than or equal to 1 / 40 of the length in the second direction of one side of the battery case 110 in the first direction, and may be less than or equal to 1 / 5.

[0149] As a result, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction, which is not in contact with the first frame 210, among one side surface 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, thereby ensuring a sufficient area of ​​a corner portion 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, thereby preventing poor appearance of the battery case 110. Furthermore, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction, which is not in contact with the first frame 210, among one side surface 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, thereby ensuring a sufficient area of ​​the battery case 110 that can be pressed by the first frame 210, thereby enabling the battery cells 100 to be stably fixed.

[0150] The above-mentioned effects and specific effects of the present invention will be explained and described in the following detailed description of the preferred embodiments of the present invention. [Brief explanation of the drawings]

[0151] [Figure 1] 1 is a perspective view schematically illustrating a battery cell and a battery cell fixing device according to an embodiment of the present invention; [Figure 2] 1 is a perspective view schematically illustrating a battery cell and a battery cell fixing device according to an embodiment of the present invention; [Figure 3] FIG. 2 is an exploded perspective view of FIG. 1. [Figure 4] FIG. 3 is an exploded perspective view of FIG. 2. [Figure 5] FIG. 3 is a side view of the battery cell and battery cell fixing device of FIGS. 1 and 2. [Figure 6] FIG. 3 is a side cross-sectional view of the battery cell and battery cell fixing device of FIGS. 1 and 2. [Figure 7] FIG. 7 is an exploded perspective view of the battery cell of FIGS. 1 to 6. [Figure 8] 8 is a diagram illustrating a state in which the battery case of the battery cell of FIG. 7 interferes with the electrode assembly disposed inside the battery cell when the battery case is bent. DETAILED DESCRIPTION OF THE INVENTION

[0152] The above-mentioned objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily implement the technical concept of the present invention. In describing the present invention, if a detailed description of known technologies relating to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of 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" and "second" are used to describe various components, it is understood that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a first component may also be a second component.

[0154] Unless otherwise specified in the entire specification, each element may be singular or plural.

[0155] Hereinafter, when an arbitrary structure is arranged "on top (or bottom)" of a component or "above (or below)" a component, it means that the arbitrary structure is not only arranged in contact with the upper surface (or lower surface) of the component, but also that other structures may be interposed between the component and the arbitrary structure arranged above (or below) the component.

[0156] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the components may be directly coupled or connected to each other, but that other components may be "intervening" between the components, or that each component may be "coupled," "coupled," or "connected" via other components.

[0157] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. Terms such as "comprise" or "include" in this application should not be interpreted as including all of the multiple components or multiple steps described in the specification, but should be interpreted as meaning that some of the components or some of the steps may not be included, or that additional components or steps may be included.

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

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

[0160] [Battery cell] 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 portion 110a and a second case portion 110b. The battery case 110 may be made of a material containing aluminum, for example.

[0162] [First case part] The first case portion 110a may extend in a second direction (e.g., the front-rear direction) and a third direction (e.g., the left-right direction), where the second direction may intersect with the first direction (e.g., the up-down direction), and the third direction may intersect with the first and second directions.

[0163] The first case portion 110a may include a first housing portion 112a. The first case portion 110a may include a first extending portion 114a.

[0164] The first receiving portion 112a may face or contact the second receiving portion 112b of the second case portion 110b to form a receiving space (AS, FIG. 6) therein in which the electrode assembly 120 described below is received.

[0165] The first accommodating portion 112a may have a recessed shape to accommodate at least a portion of the electrode assembly 120. Therefore, the recessed first accommodating portion 112a can define a first predetermined space (PS1) that forms at least a portion of the accommodation space (AS) (for example, a lower half of the accommodation space) (FIGS. 6 to 8).

[0166] However, the first accommodating portion 112a is not limited to this configuration. For example, the first accommodating portion 112a may be in the shape of a flat plate.

[0167] The first extension portion 114a extends outward from the first housing portion 112a, but may also extend from the first housing portion 112a in at least one second direction (e.g., forward) or the other second direction (e.g., backward). The first extension portion 114a may at least partially surround the first housing portion 112a. The first extension portion 114a can be joined to the second extension portion 114b of the second case portion 110b.

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

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

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

[0171] The second receiving portion 112b may face or contact the first receiving portion 112a of the first case portion 110a to form a receiving space (AS, FIG. 6) therein in which the electrode assembly 120 described below is received.

[0172] 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). Therefore, of one side surface (e.g., upper surface) of the second accommodation portion 112b in the first direction, at least a portion of one side (e.g., front side) end (E1) or the other side (e.g., rear side) end (E2) in the second 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 spaced apart in the second direction from one end (e.g., the front end) of the second accommodation portion 112b by a distance (D1) and from the other end (e.g., the rear end) of the second accommodation portion 112b by a distance (D2) (FIG. 6). Here, the distances (D1) and (D2) may be larger than the thickness of the second accommodation portion 112b. Therefore, a portion of one side surface of the second accommodation portion 112b in the first direction, corresponding to the section in the second direction from one end of the one end portion (E1) in the second direction to the distance (D1), and a portion corresponding to the section in the second direction from the other end portion (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, at least a portion of one end portion (E1) or the other end portion (E2) in the second direction among one side surface in the first direction of the second housing portion 112b is not supported in the first direction by the electrode assembly 120, and therefore, when the one end portion or the other end portion in the second direction of the second housing portion 112b is pressed in the other direction in the first direction (e.g., downward) by the first frame 210 described later, it is likely to deform in the other direction in the first direction. This will be described later.

[0175] Meanwhile, the above-mentioned problem may also occur in the first receiving portion 112a. That is, if the width (W1) in the second direction of the receiving space (AS) is greater than the width (W2) in the second direction of the electrode assembly 120, at least a portion of one (e.g., front) end (E3) or the other (e.g., rear) end (E4) of the other side (e.g., lower side) in the first direction of the first receiving portion 112a is not supported in the first direction by the electrode assembly 120. Therefore, when pressed in one direction in the first direction (e.g., upward) by the second frame 220 described below, it is likely to deform in one direction in the first direction (FIG. 6). This will be described later.

[0176] The second housing portion 112b may have a recessed shape to accommodate at least a portion of the electrode assembly 120. Therefore, the recessed second housing portion 112b can define a second predetermined space (PS2) that forms at least a portion of the housing space (AS) (for example, the upper half of the housing space) (FIGS. 6 to 8). However, the present invention is not limited to this configuration.

[0177] The second extending portion 114b extends outward from the second housing portion 112b, but may also extend from the second housing portion 112b in at least one second direction (e.g., forward) or the other second direction (e.g., backward). The second extending portion 114b may at least partially surround the second housing 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 further in the first direction (e.g., upward) than the second extending portion 114b. For example, the second accommodating portion 112b may have a recessed shape to define the second predetermined space (PS2), and may protrude further in the first direction than the second extending portion 114b.

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

[0180] The second case portion 110b is separable from the first case portion 110a except for one end or the other end in the second direction connected to the first case portion 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, one end or the other 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] In this case, as described above, if the second receiving portion 112b has a recessed shape to receive at least a portion of the electrode assembly 120, thereby defining the second predetermined space PS2 that constitutes at least a portion of the receiving space AS, when the second case portion 110b is bent relative to the first case portion 110a with the electrode assembly 120 disposed in the first receiving portion 112a, the recessed second receiving portion 112b may interfere with the electrode assembly 120. For example, as shown in FIG. 8, the second receiving portion 112b may interfere with interference portions 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] To prevent the second receiving portion 112b from interfering with the electrode assembly 120, the width (W1', FIGS. 6 and 8) of the second predetermined space (PS2) defined by the concave second receiving portion 112b in the receiving space (AS) in the second direction needs to be sufficiently larger than the width (W2) of the electrode assembly 120 in the second direction. However, if the width (W1') of the second predetermined space (PS2) in the receiving space (AS) in the second direction is larger than the width (W2) of the electrode assembly 120 in the second direction, as described above, at least a portion of one end (E1) or the other end (E2) in the second direction of one side surface in the first direction of the second receiving 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 housing portion 112a with the second housing portion 112b, in order for the second housing portion 112b to not interfere with the electrode assembly 120, the width (W1') in the second direction of the second predetermined space (PS2) of the second housing portion 112b needs to be larger than the width (W2) in the second direction of the electrode assembly 120. Therefore, of one side surface in the first direction of the second housing portion 112b, at least a portion of one end portion (E1) or the other end portion (E2) in the second direction does not necessarily have to be supported in the first direction by the electrode assembly 120. This will be described later.

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

[0186] The electrode assembly 120 may include one or more electrodes (not shown) and one or more separators (not shown). The electrodes and separators may be stacked alternately in a first direction.

[0187] Each electrode and each separator may extend in the second and third directions, so that 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 a third direction.

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

[0190] The battery cell fastening device 200 can fasten the battery cells 100. Therefore, the battery cell fastening device 200 can be used to stably transport the battery cells 100 to a work area for one or more processes, or to fasten the battery cells 100 in one or more processes (for example, a sealing process) and perform a predetermined operation (for example, a sealing operation).

[0191] Furthermore, the battery cell fixing device 200 can be used to maintain the correct shape of the battery case 110 when the electrode assembly 120 is housed inside the battery case 110. For example, when the battery case 110 is bent and the electrode assembly 120 is housed inside the battery case 110 as shown in Figures 7 and 8, the battery case 110 can be fully folded and stacked with the electrode assembly 120 housed inside the battery case 110 as shown in Figures 5 and 6, and the battery case 110 can be fixed by applying pressure to it using the battery cell fixing device 200.

[0192] [1st frame] The first frame 210 contacts one side (e.g., the upper side) of the battery case 110 in a first direction (e.g., the up-down direction) and can pressurize the battery cells 100 in the other direction (e.g., downward) in the first direction to fix them.

[0193] Here, the pressurization may include relative pressurization. The same applies below. For example, when the second frame 220 or the like pressurizes the battery cell 100 in one direction in 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 in the first direction.

[0194] In this case, the first frame 210 is not in contact with one (e.g., front) end (E1) or the other (e.g., rear) end (E2) of one side of the battery case 110 in the first direction in a second direction (e.g., the front-to-rear direction) that intersects with the first direction, and it is not necessary to pressurize or fix the one side end (E1) or the other side end (E2) of the battery case 110 in the second direction toward the other side in the first direction.

[0195] For example, the first frame 210 may contact one side surface in the first direction of the second housing portion 112b of the second case portion 110b of the battery case 110, which forms one side surface in the first direction of the battery case 110, and pressurize and fix the second housing portion 112b and the battery cell 100 in the other direction in the first direction. In this case, the first frame 210 does not contact one end portion (E1) or the other end portion (E2) in the second direction of the one side surface in the first direction of the second housing portion 112b, and does not need to pressurize and fix the one end portion (E1) or the other end portion (E2) in the second direction of the one side surface in the first direction of the second housing portion 112b in the other direction in the first direction ( FIGS. 5 and 6 ).

[0196] As a result, the first frame 210 presses the center portion in the second direction between one end portion (E1) and 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 in the first direction, thereby stably fixing the battery cell 100. As a result, i) the battery cell 100 can be stably transported to a work area for one or more processes, ii) predetermined work can be smoothly performed in one or more processes with the battery cell 100 stably fixed, and iii) the correct shape of the battery case 110 can be stably maintained with the electrode assembly 120 housed inside the battery case 110.

[0197] Furthermore, because the first frame 210 does not press one end (E1) or the other end (E2) in the second direction of one side of the battery case 110 in the first direction toward the other side in the first direction, it is possible to prevent corner portions of one or the other side of the battery case 110 in the second direction from being pressed by the first frame 210 and deforming into an incorrect shape, which is difficult to restore to its original correct shape after the pressure is stopped. In particular, when the corner portions of the battery case 110 are pressed by the battery cell fixing device 200, they may be deformed into an incorrect shape due to design tolerances, assembly tolerances, or alignment errors of the battery cells 100 or the battery cell fixing device 200, which may make it difficult to restore their original shape. Therefore, it is preferable not to pressurize the corner portions of the battery case 110 with the battery cell fixing device 200.

[0198] For example, when the center portion in the second direction between one end portion (E1) and the other end portion (E2) of one side surface in the first direction of the second accommodating portion 112b is pressurized by the first frame 210, even if a corner portion on one or the other side in the second direction of the second accommodating portion 112b, to which the one end portion (E1) or the other end portion (E2) of the one side surface in the first direction of the second accommodating portion 112b belongs, is bent and temporarily deformed due to design tolerances, assembly tolerances, alignment errors, etc., the corner portion on one or the other side in the second direction of the second accommodating portion 112b is not pressurized by the first frame 210. Therefore, when the pressure of the first frame 210 on the center portion in the second direction of the one side surface in the first direction of the second accommodating portion 112b is stopped, the corner portion on one or the other side in the second direction of the second accommodating portion 112b is likely to restore to its original correct shape.

[0199] This prevents the appearance of the battery case 110 from being deteriorated due to pressure from the battery cell fixing device 200. This reduces the defective rate of the battery cells 100, and reduces the manufacturing costs of the battery cells 100.

[0200] Furthermore, the first frame 210 does not apply pressure to one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction, so even if the thickness of the battery case 110 increases, it is possible to prevent the appearance of the battery case 110 from being deteriorated by pressure from the battery cell fixing device 200. This prevents the appearance from being deteriorated and improves the durability of the battery case 110.

[0201] This will be discussed in detail as follows. Generally, as the thickness of the battery case 110 increases, the degree to which the deformed battery case 110 can be restored to its original shape when pressed with the same amount of pressure may decrease. However, in the present invention, the first frame 210 does not pressurize one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction. Therefore, even if the thickness of the battery case 110 increases, there is no problem in that the corners on one or the other side in the second direction of the battery case 110, to which the one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction belongs, are pressed by the first frame 210 and deformed, and then fail to restore their original shape.

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

[0203] As a result, even if at least a portion of one side end (E1) or the other side end (E2) in the second direction of one side surface in the first 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 pressurize the corner of one side or the other side in the second direction of the second accommodating portion 112b in the other direction in the first direction, thereby preventing poor appearance of the battery case 110 due to pressure from the battery cell fixing device 200.

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

[0205] In this case, 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 housing portion 112a, the width (W1') in the second direction of the second predetermined space (PS2) of the housing space (AS) may be larger than the width (W2) in the second direction of the electrode assembly 120 so that the second housing portion 112b does not interfere with the electrode assembly 120 (FIGS. 6 and 8). Therefore, of one side surface in the first direction of the second housing portion 112b, at least a portion of one end portion (E1) or the other end portion (E2) in the second direction may not be supported in the first direction by the electrode assembly 120.

[0206] As a result, 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 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 portion of the corners on one or the other side of the second direction of the second accommodating portion 112b are not supported in the first direction by the electrode assembly 120, the first frame 210 does not pressurize the corners on one or the other side of the second direction of the second accommodating portion 112b in the other direction in the first direction, and therefore, it is possible to prevent poor appearance of the battery case 110 due to pressure applied by the battery cell fixing device 200.

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

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

[0209] As a result, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction, which is not in contact with the first frame 210, among one side surface 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, thereby ensuring a sufficient area of ​​a corner portion 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, thereby preventing poor appearance of the battery case 110. Furthermore, the length in the second direction of one end portion (E1) or the other end portion (E2) in the second direction, which is not in contact with the first frame 210, among one side surface 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, thereby ensuring a sufficient area of ​​the battery case 110 that can be pressed by the first frame 210, thereby enabling the battery cells 100 to 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. The first base portion 212 and the first support portion 214 will be discussed below.

[0211] [1st foundation part] 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 pressure surface (S1) and a first pressure prevention groove (H1). The first base portion 212 may include a third pressure prevention groove (H3) (FIGS. 2 and 4).

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

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

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

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

[0217] The first compression prevention groove (H1) prevents the first frame 210 from contacting one end (E1) or the other end (E2) in the second direction of one side surface in the first direction of the battery case 110, so that the one end (E1) or the other end (E2) in the second direction of one side surface in the first direction of the battery case 110 does not need to be pressed toward the other side in the first direction to fix the battery case 110. For example, the first compression prevention groove (H1) prevents the first frame 210 from contacting one end (E1) or the other end (E2) in the second direction of one side surface in the first direction of the second housing portion 112b, so that the one end (E1) or the other end (E2) in the second direction of one side surface in the first direction of the second housing portion 112b does not need to be pressed toward the other side in the first direction to fix the battery case 110.

[0218] This allows the first frame 210, which pressurizes the battery case 110 to fix the battery cells 100 but does not pressurize and fix the corners on one or the other side of the battery case 110 in the second direction, to be easily manufactured with a simple structure and at low cost.

[0219] In addition, the first anti-pressure groove (H1) of the first frame 210 is formed to face a corner portion on one or the other side of the battery case 110 in the second direction, so that the corner portion on one or the other side of the battery case 110 in the second direction can be covered by the first frame 210 even if it is not pressed and fixed by the first frame 210. Therefore, the corner portion on one or the other side of the battery case 110 in the second direction that is not pressed and fixed by the first frame 210 can also be protected from external impact by the first frame 210. Therefore, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be reduced.

[0220] On the other hand, the first frame 210 does not contact one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction, and it is not necessary to pressurize and fix the one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction in the other direction in the first direction.

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

[0222] In this case, the first frame 210 is not in contact with one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction due to a pair of first pressure prevention grooves (H1), and it is not necessary to pressurize and fix the one end (E1) and the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction in the other direction in the first direction.

[0223] As a result, the first frame 210 does not press one end (E1) and the other end (E2) in the second direction of one side of the battery case 110 in the first direction toward the other side in the first direction, so that both corners of the battery case 110 in the second direction are pressed by the first frame 210 and deformed into an incorrect shape, but the deformation is prevented from being difficult to restore to its original correct shape after the pressure is stopped. Therefore, it is possible to prevent the appearance of the battery case 110 from being deteriorated due to the pressure of the battery cell fixing device 200. As a result, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be saved.

[0224] In addition, the first frame 210, which pressurizes the battery case 110 to fix the battery cells 100 but does not pressurize and fix both corner portions of the battery case 110 in the second direction, can be easily manufactured with a simple configuration and at low cost.

[0225] In addition, since the pair of first anti-pressure grooves (H1) of the first frame 210 are formed to face both corners in the second direction of the battery case 110, both corners in the second direction of the battery case 110 can be covered by the first frame 210 even if they are not pressed and fixed by the first frame 210. Therefore, both corners in the second direction of the battery case 110 that are not pressed and fixed by the first frame 210 can also be protected from external impacts by the first frame 210. This can reduce the defective rate of the battery cells 100, thereby reducing the manufacturing cost of the battery cells 100.

[0226] When one side surface of the battery case 110 in the first direction extends in a third direction intersecting the first and second directions, the first pressure application 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 (FIGS. 1 to 4).

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

[0228] As a result, when a corner on one or the other side of the battery case 110 in the second direction, to which one end (E1) or the other end (E2) in the second direction of one side surface of the battery case 110 in the first direction belongs, extends in the third direction, the corner on one or the other side of the battery case 110 in the second direction, which extends in the third direction, can be prevented from being pressed by the first frame 210. As a result, even if the corner on one or the other side of the battery case 110 in the second direction is deformed into an incorrect shape, it is possible to prevent the deformation from being difficult to restore. Therefore, it is possible to prevent the appearance of the battery case 110 from being deteriorated due to the pressure of the battery cell fixing device 200. As a result, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be reduced.

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

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

[0231] The third anti-pressure groove (H3) prevents the first frame 210 from contacting one end or the other end in the third direction of one side surface of the battery case 110 in the first direction, so that the one end or the other end in the third direction of one side surface of the battery case 110 in the first direction does not need to be pressed in the other direction in the first direction to fix the battery case 110. For example, the third anti-pressure groove (H3) prevents the first frame 210 from contacting one end or the other end in the third direction of one side surface of the second housing portion 112b in the first direction, so that the one end or the other end in the third direction of one side surface of the second housing portion 112b in the first direction does not need to be pressed in the other direction in the first direction to fix the battery case 110.

[0232] As a result, the first frame 210 does not pressurize one end or the other end in the third direction of one side of the battery case 110 in the first direction toward the other side in the first direction, so that although the corner portions on one or the other side of the battery case 110 in the third direction are pressed by the first frame 210 and deformed into an incorrect shape, it is difficult for the corner portions to return to their original correct shape after the pressure is stopped, and this deformation can be prevented.

[0233] In addition, corner portions of one or the other side of the battery case 110 in the third direction may be covered by the first frame 210 even if they are not pressed and fixed by the first frame 210. Therefore, the corner portions of one or the other side of the battery case 110 in the third direction that are not pressed and fixed by the first frame 210 can also be protected from external impacts by the first frame 210. Therefore, the defective rate of the battery cells 100 may be reduced, and the manufacturing cost of the battery cells 100 may be reduced.

[0234] [1st support part] The first support part 214 may be arranged on one side in the second direction of the first anti-pressure groove (H1) formed on one side in the second direction of the first pressure surface (S1), or may be arranged on the other side in the second direction of the first anti-pressure 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 be in contact with one side surface or the other side surface in the second direction of the battery cell 100. For example, the first support portion 214 may face or be in contact with one side surface or the other side surface in the second direction of the second accommodating portion 112b in the second direction.

[0237] This makes it possible to prevent the battery cell 100 from moving in one or the other direction in the second direction or from separating from the first frame 210 in one or the other direction in the second direction.

[0238] In addition, the battery case 110 is pressurized to fix the battery cells 100, but the corners on one or the other side of the battery case 110 in the second direction are not pressurized to fix the battery cells 100, and the first frame 210 is prevented 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. This first frame 210 can be easily manufactured with a simple structure 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] The first frame 210 can press and fix the second extension portion 114b of the battery cell 100 in the other direction in the first direction via the first support portion 214. At this time, as described above, the first frame 210 can press and fix the second accommodating portion 112b of the battery cell 100 in the other direction in the first direction via the first pressure surface (S1) of the first base portion 212.

[0241] 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 in the other direction of the first direction, so that the first frame 210 can stably fix the battery cell 100 and the battery case 110 can maintain the correct shape when the electrode assembly 120 is accommodated inside the battery case 110.

[0242] In addition, the first frame 210, which can stably fix the battery cells 100 and maintain the correct shape of the battery case 110 when the electrode assembly 120 is housed inside the battery case 110, can be easily manufactured with a simple structure and at low cost.

[0243] Two first supports 214 may be provided. The two first supports 214 may be a first one-side support 214a and a first other-side support 214b (FIGS. 5 and 6). In this case, 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 anti-pressure groove (H1) of the pair of first anti-pressure grooves (H1) formed on one side in the second direction of the first pressing surface (S1). The first one-side support portion 214a may be coupled to the first base portion 212 and may face or contact one side surface in the second direction of the battery cell 100 (FIGS. 5 and 6).

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

[0246] This makes it possible to prevent the battery cells 100 from moving in either direction in the second direction or from separating from the first frame 210 in either direction in the second direction.

[0247] Furthermore, the battery case 110 is pressurized to fix the battery cells 100, but both corner portions of the battery case 110 in the second direction are not pressurized to fix the battery cells 100, and the first frame 210 is prevented from moving in one and the other direction in the second direction or from detaching from the first frame 210 in one and the other direction in the second direction. This first frame 210 can be easily manufactured with a simple structure and at low cost.

[0248] [2nd frame] The second frame 220 may be disposed facing the first frame 210 across the battery cell 100. The second frame 220 may be disposed on the other side of the first frame 210 in the first direction.

[0249] The second frame 220 contacts the other side (for example, the lower side) of the battery case 110 in the first direction, and can press the battery cells 100 in one direction (for example, upward) to fix them.

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

[0251] Here, the term "applying pressure" may include relative pressure. The same applies below. For example, when the first frame 210 or the like applies pressure to the battery cell 100 in the other direction in the first direction, even if the second frame 220 is fixed, the second frame 220 can relatively apply pressure to the battery cell 100 in one direction in the first direction.

[0252] In this case, the second frame 220 does not contact one end (E3) or the other 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 pressurize or fix one end (E3) or the other end (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.

[0253] For example, the second frame 220 may contact the other side surface in the first direction of the first housing portion 112a of the first case portion 110a of the battery case 110, which constitutes the other side surface in the first direction of the battery case 110, and pressurize and fix the first housing portion 112a and the battery cell 100 in one direction in the first direction. In this case, the second frame 220 does not contact one end (E3) or the other end (E4) in the second direction of the other side surface in the first direction of the first housing portion 112a, and does not need to pressurize and fix the one end (E3) or the other end (E4) in the second direction of the other side surface in the first direction of the first housing portion 112a in one direction in the first direction ( FIGS. 5 and 6 ).

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

[0255] As a result, the first frame 210 and the second frame 220 pressurize the center portion in the second direction between one side end (E1, E3) and the other side end (E2, E4) in the second direction of one side and the other side of the battery case 110 in the first direction, to one side and the other in the first direction, thereby stably fixing the battery cell 100.

[0256] Furthermore, since the first frame 210 and the second frame 220 do not pressurize the one side end (E1, E3) or the other side end (E2, E4) in the second direction of one side and the other side of the battery case 110 in the first direction toward one side and / or the other in the first direction, it is possible to prevent the corner portions of one side or the other in the second direction of the battery case 110 from being deformed into an incorrect shape when pressed by the first frame 210 and the second frame, and from being difficult to restore to their original correct shape after the pressing is stopped.

[0257] This prevents the appearance of the battery case 110 from being deteriorated due to pressure from the battery cell fixing device 200. This reduces the defective rate of the battery cells 100, and reduces the manufacturing costs of the battery cells 100.

[0258] In particular, even when either the first frame 210 or the second frame 220 is fixed and the fixed frame presses the battery cell 100 relatively by applying pressure to the other frame, the fixed first frame 210 or second frame 220 does not pressurize the corner portions on one or the other side of the second direction of the battery case 110, thereby preventing poor appearance of the battery case 110 due to pressure applied by the battery cell fixing device 200.

[0259] Furthermore, the first frame 210 and the second frame 220 do not pressurize one end (E1, E3) or the other end (E2, E4) in the second direction of one side surface in the first direction and the other side surface of the battery case 110 in the other direction in the first direction, so even if the thickness of the battery case 110 increases, it is possible to prevent the appearance of the battery case 110 from being deteriorated by the pressure of the battery cell fixing device 200. This prevents the appearance from being deteriorated and improves the durability of the battery case 110.

[0260] This will be discussed in more detail as follows. As mentioned above, generally, as the thickness of the battery case 110 increases, the degree to which the battery case 110, when deformed by being compressed with the same strength of pressure, can return to its original shape may decrease. However, in the present invention, the first frame 210 and the second frame 220 do not press the one end (E1, E3) or the other end (E2, E4) in the second direction of one side and the other side of the battery case 110 in the first direction toward one side and / or the other in the first direction. Therefore, even if the thickness of the battery case 110 increases, there is no problem in that the corners of the one or other side of the battery case 110 in the second direction are compressed by the first frame 210 and deformed, and then do not return to their original shape.

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

[0262] As a result, the first frame 210 and the second frame 220 may correspond to each other at boundary points where they press one side and the other side in the first direction of the battery case 110 in the one direction and the other side in the first direction, respectively. Therefore, the areas where the battery cell fixing device 200 can press one side and the other side in the first direction of the battery case 110 correspond to each other, so the battery cell fixing device 200 can stably fix the battery cells 100.

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

[0264] For example, the length in the second direction of one side end (E3) or the other side end (E4) in the second direction of the other side surface in the first direction of the first accommodating portion 112a that is not in contact with the second frame 220 may be greater than or equal to 1 / 40 of the length in the second direction of the other side surface in the first direction of the first accommodating portion 112a, and may be less than or equal to 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. The second base portion 222 and the second support portion 224 will be discussed below.

[0266] [Second foundation part] 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 pressure 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 pressure applying surface (S2) may be in contact with the other side surface in the first direction of the battery case 110. For example, the second pressure applying surface (S2) may be in contact with the other side surface in the first direction of the first accommodating portion 112a.

[0269] The second frame 220 can press the battery cell 100 in one direction in the first direction via the second pressure surface (S2) to fix it. For example, the second frame 220 can press the first housing portion 112a of the battery cell 100 in one direction in the first direction via the second pressure surface (S2) to fix it.

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

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

[0272] The second anti-pressure groove (H2) prevents the second frame 220 from contacting one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction, so that the one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction does not need to be pressed toward one side in the first direction to fix the one end (E3) or the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction. For example, the second anti-pressure groove (H2) prevents the second frame 220 from contacting one end (E3) or the other end (E4) in the second direction of the other side surface of the first accommodating portion 112a in the first direction, so that the one end (E3) or the other end (E4) in the second direction of the other side surface of the first accommodating portion 112a in the first direction does not need to be pressed toward one side in the first direction to fix the one end (E3) or the other end (E4) in the second direction of the other side surface of the first accommodating portion 112a in the first direction.

[0273] This allows the second frame 220, which pressurizes the battery case 110 to fix the battery cells 100 but does not pressurize and fix the corner portions on one or the other side of the second direction of the battery case 110, to be easily manufactured with a simple structure and at low cost.

[0274] In addition, the second anti-pressure groove (H2) of the second frame 220 is formed to face a corner portion on one or the other side of the battery case 110 in the second direction, so that even if the corner portion on one or the other side of the battery case 110 in the second direction is not pressed and fixed by the second frame 220, it can be covered by the second frame 220. Therefore, the corner portion on one or the other side of the battery case 110 in the second direction that is not pressed and fixed by the second frame 220 can also be protected from external impact by the second frame 220. Therefore, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be reduced.

[0275] On the other hand, the second frame 220 does not contact one end (E3) and the other 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 pressurize and fix the one end (E3) and the other end (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.

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

[0277] In this case, the second frame 220 is not in contact with one end (E3) and the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction due to a pair of second pressure prevention grooves (H2), and it is not necessary to pressurize and fix the one end (E3) and the other end (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.

[0278] As a result, the second frame 220 does not press the one end (E3) and the other end (E4) in the second direction of the other side surface of the battery case 110 in the first direction in one direction, so that both corners in the second direction of the battery case 110 are pressed by the second frame 220 and deformed into an incorrect shape, but it is difficult for the battery case 110 to return to its original correct shape after the pressure is stopped. Therefore, it is possible to prevent the appearance of the battery case 110 from being deteriorated due to the pressure of the battery cell fixing device 200. As a result, the defective rate of the battery cells 100 can be reduced, and the manufacturing cost of the battery cells 100 can be saved.

[0279] In addition, the second frame 220, which pressurizes the battery case 110 to fix the battery cells 100 but does not pressurize 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.

[0280] In addition, since the pair of second anti-pressure grooves (H2) of the second frame 220 are formed to face both corners in the second direction of the battery case 110, even if both corners in the second direction of the battery case 110 are not pressed and fixed by the second frame 220, they can all be covered by the second frame 220. Therefore, both corners in the second direction of the battery case 110 that are not pressed and fixed by the second frame 220 can also be protected from external impacts by the second frame 220. This can reduce the defective rate of the battery cells 100, thereby reducing the manufacturing costs of the battery cells 100.

[0281] When the other side surface of the battery case 110 in the first direction extends in the third direction, the second pressure application 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, if the other side surface of the first accommodating portion 112a in the first direction extends in the third direction, the second pressure application 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 (Figures 1 to 4).

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

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

[0285] The fourth anti-pressure groove (H4) prevents the second frame 220 from contacting one end or the other end in the third direction of the other side surface of the battery case 110 in the first direction, so that the one end or the other end in the third direction of the other side surface of the battery case 110 in the first direction does not have to be pressed toward one side in the first direction to fix the one end or the other end in the third direction of the other side surface of the battery case 110 in the first direction. For example, the fourth anti-pressure groove (H4) prevents the second frame 220 from contacting 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, so that the 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 does not have to be pressed toward one side in the first direction to fix the one end or the other end in the third direction of the other side surface of the first accommodating portion 112a.

[0286] As a result, the second frame 220 does not pressurize one end or the other end in the third direction of one side of the battery case 110 in the first direction in one direction, so that although the corner portion of one 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, it is difficult for the corner portion to return to its original correct shape after the pressure is stopped, and this deformation can be prevented.

[0287] In addition, corner portions of one or the other side of the battery case 110 in the third direction may be covered by the second frame 220 even if they are not pressed and fixed by the second frame 220. Therefore, the corner portions of one or the other side of the battery case 110 in the third direction that are not pressed and fixed by the second frame 220 can also be protected from external impacts by the second frame 220. Therefore, the defective rate of the battery cells 100 may be reduced, and the manufacturing cost of the battery cells 100 may be reduced.

[0288] [Second support part] The second support part 224 may be arranged on one side in the second direction of the second anti-pressure groove (H2) formed on one side in the second direction of the second pressure surface (S2), or may be arranged on the other side in the second direction of the second anti-pressure 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 in the second direction of the battery cell 100. For example, the second support portion 224 may face or be in contact with one side surface or the other side surface in the second direction of the first accommodating portion 112a.

[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 the first extension portion 114a of the battery cell 100 in one direction in the first direction via the second support portion 224 to fix it.

[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] The second support portion 224 may include two second support portions 224. 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). In this case, 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 one of the pair of second anti-pressure grooves (H2) formed on one side in the second direction of the second pressing surface (S2). The second one-side support portion 224a may be coupled to the second base portion 222 and may face or contact one side surface in the second direction of the battery cell 100 (FIGS. 5 and 6).

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

[0297] Meanwhile, matters relating to the first frame 220, the first base portion 212, and the first support portion 214 can be applied to the second frame 220, the second base portion 222, and the second support portion 224 by analogy.

[0298] It should be understood that the above-described embodiments are illustrative in all respects and are not limiting, and the scope of the present invention is defined by the following claims rather than the above detailed description. All modifications and variations within the meaning and scope of the following claims, as well as equivalent concepts, should be construed as being included within the scope of the present invention.

[0299] Although the present invention has been described above with reference to illustrative drawings, the present invention is not limited to the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described and explained while the embodiments of the present invention are described above, it is natural that the effects that can be predicted by the configuration should also be recognized. [Explanation of symbols]

[0300] 100 battery cells 110 Battery case 110a First case part 110b Second case part 112a First storage section 112b Second storage compartment 114a 1st extension part 114b 2nd extension 120 Electrode assembly 122 terminals 200 Battery cell fixing device 210 1st Frame 220 2nd Frame 212 1st Foundation Section 222 2nd Foundation Section 214 1st support part 224 Second support part S1 First pressure surface S2 Second pressure surface H1 First pressure prevention groove H2 Second pressure prevention groove H3 3rd pressure prevention groove H4 4th pressure prevention groove

Claims

1. 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 and presses and fixes the battery cells in the other direction in the first direction, but does not contact one end or the other end of the one side surface of the battery case in the first direction in a second direction intersecting the first direction, and does not press and fix the one end or the other end of the one side surface of the battery case in the second direction in the other direction in the first direction; the first frame includes a first base portion disposed on one side of the battery cell in a first direction, the first base portion includes a first pressing surface in contact with one side surface of the battery case in a first direction; and a first anti-pressure groove formed on one or the other side of the first pressing surface in a second direction but recessed in one direction in the first direction, and facing one end or the other end of the one side surface of the battery case in the first direction in the second direction, the first frame presses the battery cell in the other direction in the first direction via the first pressing surface to fix the battery cell, but does not contact one end or the other end in the second direction of one side surface of the battery case in the first direction due to the first pressure prevention groove, and does not press the one end or the other end in the second direction of one side surface of the battery case in the first direction to fix the battery cell, Battery cell fixing device.

2. a second frame disposed opposite the first frame with the battery cell interposed therebetween, in contact with the other side surface of the battery case in the first direction that is located on the other side in the first direction of the one side surface of the battery case in the first direction, and presses and fixes the battery cell in one direction in the first direction, but does not contact one end or the other 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 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 in the first direction; The battery cell fixing device according to claim 1 .

3. the other end in the second direction of one side end in the second direction that is not in contact with 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 side end in the second direction that is not in contact with the second frame among the other side surface of the battery case in the first direction intersect with the same imaginary straight line extending in the first direction, or one end in the second direction of the other end portion in the second direction of the one side surface of the battery case in the first direction that is not in contact with the first frame, and one end in the second direction of the other end portion in the second direction of the other side surface of the battery case in the first direction that is not in contact with the second frame, intersect with the same imaginary straight line extending in the first direction; The battery cell fixing device according to claim 2 .

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

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

6. 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 pressure surface and the first pressure prevention groove extend in a third direction along one side surface of the battery case in the first direction; The battery cell fixing device according to claim 1 .

7. the first base portion is formed on one side or the other side of the first pressing surface in a third direction intersecting the first and second directions, and includes a third pressure prevention groove recessed in one side in the first direction and facing one end or the other end in the third direction of one side surface of the battery case in the first direction; the first frame presses the battery cell in the other direction in the first direction via the first pressing surface to fix the battery cell, but does not contact one end or the other end in the third direction of one side surface of the battery case in the first direction due to the third pressure prevention groove, and does not press the one end or the other end in the third direction of one side surface of the battery case in the first direction to fix the battery cell, The battery cell fixing device according to claim 1 .

8. the first frame does not contact one end and the other end in a second direction of one side surface of the battery case in a first direction, and does not press and fix the one end and the other end in the second direction of one side surface of the battery case in the first direction toward the other side in the first direction; the first base portion is formed on one side and the other side of the first pressing surface in the second direction, respectively, and is recessed on one side in the first direction, and includes a pair of first pressure prevention grooves facing one side end and the other side end in the second direction of one side surface in the first direction of the battery case, respectively; the first frame does not contact one end and the other end in the second direction of one side surface of the battery case in the first direction due to the pair of first pressure prevention grooves, and does not press and fix the one end and the other end in the second direction of one side surface of the battery case in the first direction in the other direction in the first direction; The battery cell fixing device according to claim 1 .

9. the first frame includes: a first one-side support part disposed on one side in the second direction of one of the pair of first anti-pressure grooves formed on one side of the first pressure surface in the second direction, the first one-side support part being coupled to the first base part, and facing or contacting one side of the second direction of the battery cell; and a first other-side support part disposed on the other side in the second direction of the one of the pair of first anti-pressure grooves formed on the other side of the first pressure surface in the second direction, the first one-side support part being coupled to the first base part, and facing or contacting the other side of the second direction of the battery cell. The battery cell fixing device according to claim 8 .

10. the first frame includes a first support part disposed on one side in the second direction of the first anti-pressure groove formed on one side in the second direction of the first pressing surface, or disposed on the other side in the second direction of the first anti-pressure groove formed on the other side in the second direction of the first pressing surface, coupled to the first base part, and facing or contacting one side or the other side of the battery cell in the second direction; The battery cell fixing device according to claim 1 .

11. 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 housed between the first case portion and the second case portion, the first case portion includes a first housing portion and a first extending portion, the second case portion includes a second housing portion and a second extending portion, The first and second receiving portions face each other or contact each other to form a receiving space in which the electrode assembly is received, the first extension portion and the second extension portion extend outward from the first accommodating portion and the second accommodating portion, respectively, but also extend from the first accommodating portion and the second accommodating portion in at least one second direction or the other, at least partially surround the first accommodating portion and the second accommodating portion, respectively, and are joinable to each other; the second housing portion protrudes further in one direction than the second extension portion, the first pressure surface contacts one side surface of the second housing portion in a first direction, The first pressure prevention groove faces one end or the other end in the second direction of one side surface in the first direction of the second receiving part, the first frame presses the second housing portion of the battery cell in the other direction in the first direction via the first pressure surface to fix it, but the first pressure prevention groove does not contact one end or the other end in the second direction of one side surface of the second housing portion in the first direction, and the one end or the other end in the second direction of one side surface of the second housing portion in the first direction is not pressed in the other direction in the first direction to fix it, the first support portion faces or contacts one side surface or the other side surface of the second receiving portion in the second direction and contacts one side surface of the second extending portion in the first direction; the first frame presses the second extension portion of the battery cell in the other direction in the first direction via the first support portion to fix the battery cell; The battery cell fixing device according to claim 10.

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 housed between the first case portion and the second case portion, the first case portion and the second case portion include a first receiving portion and a second receiving portion, respectively, that face or contact each other and form a receiving space in which the electrode assembly is received; a width of the accommodating space in the second direction is greater than a width of the electrode assembly in the second direction, such that at least a portion of one end or the other end in the second direction of one side surface of the second accommodating part in the first direction is not supported in the first direction by the electrode assembly; the first frame contacts one side surface of the second housing portion in the first direction and presses the battery cell in the other direction in the first direction to fix the battery cell, but does not contact one end or the other end in the second direction of the one side surface of the second housing portion in the first direction and does not press the one end or the other end in the second direction of the one side surface of the second housing portion in the first direction to fix the battery cell, The battery cell fixing device according to claim 1 .

13. the second case part has one side end or the other side end in the second direction connected to one side end or the other side end in the second direction of the first case part, and other portions excluding the one side end or the other side end in the second direction are separable from the first case part, bent relative to the first case part, and faces the first case part in the first direction to cover the first case part; the second housing portion has a recessed shape for housing at least a portion of the electrode assembly, thereby defining a predetermined space that forms at least a portion of the housing space; When the second case portion is bent relative to the first case portion with the electrode assembly disposed in the first housing portion, the width of the predetermined space in the second direction within the housing space is greater than the width of the electrode assembly in the second direction so that the second housing portion does not interfere with the electrode assembly, and thus at least a portion of one end or the other end in the second direction of one side surface in the first direction of the second housing portion is not supported in the first direction by the electrode assembly. The battery cell fixing device according to claim 12.

14. a length in the second direction of one end or the other end of one side in the first direction of the battery case that is not in contact with the first frame is greater than or equal to 1 / 40 and less than or equal to 1 / 5 of the length in the second direction of the one side in the first direction of the battery case; The battery cell fixing device according to any one of claims 1 to 13.

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