Battery cell fixing device

Abstract

The present invention provides a battery cell fixing apparatus for fixing a battery cell 100, the battery cell comprising a battery case 110 and an electrode assembly 120 housed in the battery case 110, the battery cell fixing apparatus comprising a first frame 210, the first frame 210 is in contact with one side surface of the battery case 110 in the first direction to press and fix the battery cell 100 in the other direction of the first direction, and is not in contact with one side end E1 or the other side end E2 of the one side surface of the battery case in the second direction intersecting the first direction. Therefore, one side end E1 or the other side end E2 in the second direction is not pressed or fixed towards the other direction of the first direction. Accordingly, it is possible to prevent an external defect of the battery case 110 due to the pressure applied by the battery cell fixing device 200.

Description

Technical Field

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

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

[0003] Unlike primary batteries, which cannot be recharged, secondary batteries are batteries that can be charged and discharged. These secondary batteries are used as power sources in small high-tech electronic devices such as mobile phones, PDAs, and notebook computers, as well as energy storage systems (ESS), electric vehicles (EV), or hybrid electric vehicles (HEV).

[0004] Secondary batteries are divided into can type batteries in which an electrode assembly is embedded in a metal can and pouch type batteries in which an electrode assembly is embedded in a pouch (battery case). The pouch type secondary battery includes an electrode assembly and a pouch (battery case) accommodating the electrode assembly.

[0005] Meanwhile, when manufacturing pouch-type batteries (hereinafter referred to as battery cells), battery cell fixing equipment is used to ensure that the battery cells are stably transported to the work area to perform multiple processes, to perform predetermined tasks in multiple processes while the battery cells are fixed, or to ensure that the pouch (battery case) of the battery cell containing the electrode assembly maintains the correct shape.

[0006] The battery cell fixing device may fix the battery cell by applying pressure. Here, the bag (battery case) of the battery cell may be deformed into an incorrect shape due to the pressure applied by the battery cell fixing device, and may not be able to return to its original shape even after the pressure applied by the battery cell fixing device stops. As a result, external defects of the battery cell may occur. Therefore, there is a need for a battery cell fixing device that stably fixes the battery cell and prevents external defects of the battery case of the battery cell.

[0007] A related prior art document is Korean Patent Application Publication No. 10-2017-0122149. Summary of the invention

[0008] [Technical issues]

[0009] In order to solve the above problems, an object of the present invention is to provide a battery cell fixing apparatus which stably fixes a battery cell and prevents external defects of a battery case of the battery cell.

[0010] An object of the present invention is to provide a battery cell fixing apparatus which can prevent external defects of a battery case even when the thickness of the battery case increases.

[0011] An object of the present invention is to provide a battery cell fixing apparatus which can prevent external defects of a battery case even in a case where a width of an electrode assembly accommodating space of the battery case is greater than a width of the electrode assembly.

[0012] An object of the present invention is to provide a battery cell fixing device having a simple structure which can be easily manufactured at low cost.

[0013] An object of the present invention is to provide a battery cell fixing device capable of protecting a battery cell.

[0014] The purpose of the present invention is not limited to the above purpose, and other purposes and advantages of the present invention will be understood through the following description, and other purposes and advantages of the present invention will be more clearly understood through the embodiments of the present invention. It is also easy to understand that the purposes and advantages of the present invention can be realized and obtained by the features described in the attached claims and their combinations.

[0015] [Technical solution]

[0016] In order to solve the above problems, the present invention provides a battery cell fixing device for fixing a battery cell 100, the battery cell 100 including a battery case 110 and an electrode assembly 120 accommodated in the battery case 110, and the battery cell fixing device includes a first frame 210.

[0017] The first frame 210 contacts a side surface of the battery case 110 in the first direction to press and fix the battery cell 100 in the other direction of the first direction, while not contacting a side end E1 or another side end E2 of a side surface of the battery case in the second direction intersecting the first direction, thereby not pressing or fixing a side end E1 or another side end E2 of a side surface of the battery case in the first direction in the second direction.

[0018] In one embodiment, the battery cell fixing apparatus may include a second frame 220 .

[0019] The second frame 220 may be disposed to face the first frame 210 sandwiching the battery cell 100 .

[0020] The second frame 220 can contact the other side surface of the battery case 110 in the first direction which is located on the other side of the one side surface of the battery case 110 in the first direction to pressurize and fix the battery cell 100 in one direction of the first direction, while not contacting the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction, thereby not pressing or fixing the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery case 110 in one direction of the first direction.

[0021] In one embodiment, the other end in the second direction of one side end E1 of the side surface in the first direction of the battery housing 110 that does not contact the first frame 210 and the other end in the second direction of one side end E3 of the other side surface in the first direction of the battery housing 110 that does not contact the second frame 220 may intersect at an imaginary straight line L1 extending in the first direction, or one end in the second direction of the other side end E2 of the side surface in the second direction of the battery housing 110 that does not contact the first frame 210 and one end in the second direction of the other side end E4 of the other side surface in the first direction of the battery housing 110 that does not contact the second frame 220 may intersect at an imaginary straight line L2 extending in the first direction.

[0022] In one embodiment, the first frame 210 may include a first seat 212 disposed at one side in the first direction of the battery cell 100 .

[0023] The first base 212 may include a first pressure surface S1 and a first anti-pressure groove H1.

[0024] The first pressure surface S1 may contact one side surface of the battery case 110 in the first direction.

[0025] The first anti-pressure groove H1 can be arranged on one side or the other side of the first pressure surface S1 in the second direction, recessed in one direction of the first direction, and facing one side end E1 or the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110 in the first direction.

[0026] The first frame 210 can pressurize and fix the battery cell 100 in the other direction of the first direction through the first pressure surface S1, and at the same time, does not contact the side end E1 or the other side end E2 in the second direction of the side surface of the battery case 110 in the first direction through the first anti-pressure groove H1, thereby not pressing or fixing the side end E1 or the other side end E2 in the second direction of the side surface of the battery case 110 in the first direction in the other direction.

[0027] The second frame 220 may include a second base 222 disposed at the other side of the battery cell 100 in the first direction.

[0028] The second base 222 may include a second pressure surface S2 and a second anti-pressure groove H2.

[0029] The second pressure surface S2 may make contact with the other side surface of the battery case 110 in the first direction.

[0030] The second anti-pressure groove H2 can be arranged on one side or the other side in the second direction of the second pressure surface S2, recessed in the other direction of the first direction, and facing 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 housing 110 in the first direction.

[0031] The second frame 220 can pressurize and fix the battery cell 100 in the other direction of the first direction through the second pressure surface S2, and at the same time, does not contact the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction through the second anti-pressure groove H2, and thus does not pressurize or fix the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction in one direction.

[0032] In one embodiment, the first frame 210 may not contact one end side E1 and the other end side E2 in the second direction of a side surface in the first direction of the battery case 110, and thus does not press or fix one side end E1 and the other side end E2 of a side surface in the first direction of the battery case 110 toward the other direction of the first direction.

[0033] The first base 212 may include a pair of first anti-pressure grooves H1.

[0034] A pair of first anti-pressure grooves H1 may be respectively provided on one side and the other side of the first pressure surface S1 in the second direction and be recessed in one direction of the first direction.

[0035] The pair of first anti-pressure grooves H1 may respectively face one side end E1 and another side end E2 in the second direction of one side surface in the first direction of the battery case 110 in the first direction.

[0036] The first frame 210 can avoid contacting the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery case 110 through a pair of first anti-pressure grooves H1, thereby not applying pressure or fixing the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery case 110 toward the other direction of the first direction.

[0037] The second frame 220 may not contact one side end E3 and the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction, and thus does not press or fix one side end E3 and the other side end E4 of the other side surface of the battery case 110 in the first direction toward one direction of the first direction.

[0038] The second base 222 may include a pair of second anti-pressure grooves H2.

[0039] A pair of second anti-pressure grooves H2 may be respectively provided on one side and the other side of the second pressure surface S2 in the second direction and recessed in the other direction of the first direction.

[0040] The pair of second anti-pressure grooves H2 may face one side end E3 and another side end E4 in the second direction of the other side surface in the first direction of the battery case 110 , respectively, in the first direction.

[0041] The second frame 220 can prevent one side end E3 and the other side end E4 on the second direction of the other side surface of the battery case 110 in the first direction from contacting the other side surface E3 and the other side end E4 in the second direction through a pair of second anti-pressure grooves H2, thereby not applying pressure or fixing one side end E3 and the other side end E4 on the second direction of the other side surface of the battery case 110 in the first direction in one direction.

[0042] In one embodiment, the first frame 210 may include a first seat 212 disposed at one side in the first direction of the battery cell 100 .

[0043] The first base 212 may include a first pressure surface S1 and a first anti-pressure groove H1.

[0044] The first pressure surface S1 may contact one side surface of the battery case 110 in the first direction.

[0045] The first anti-pressure groove H1 may be provided on one side or the other side of the first pressure surface S1 in the second direction and be recessed in one direction of the first direction.

[0046] The first anti-pressure groove H1 may face one side end E1 or the other side end E2 in the second direction of one side surface of the battery case 110 in the first direction in the first direction.

[0047] The first frame 210 can pressurize and fix the battery cell 100 in the other direction of the first direction through the first pressure surface S1, and at the same time, does not contact the side end E1 or the other side end E2 in the second direction of the side surface of the battery case 110 in the first direction through the first anti-pressure groove H1, thereby not pressing or fixing the side end E1 or the other side end E2 in the second direction of the side surface of the battery case 110 in the first direction in the other direction.

[0048] In one embodiment, one side surface of the battery case 110 in the first direction may extend in a third direction intersecting the first direction and the second direction.

[0049] The first pressure surface S1 and the first anti-pressure groove H1 may extend in the third direction along one side surface of the battery case 110 in the first direction.

[0050] In one embodiment, the first base 212 may include a third anti-pressure groove H3.

[0051] The third anti-pressure groove H3 may be provided on one side or the other side of the first pressure surface S1 in a third direction intersecting the first direction and the second direction, and be recessed in one direction of the first direction.

[0052] The third anti-pressure groove H3 may face one side end or the other side end in the third direction of one side surface in the first direction of the battery case 110 in the first direction.

[0053] The first frame 210 can pressurize and fix the battery cell 100 in the other direction of the first direction through the first pressure surface S1, and at the same time, does not contact one side end or the other side end in the third direction of the side surface of the battery case 110 in the first direction through the third anti-pressure groove H3, thereby not pressing or fixing one side end or the other side end in the third direction of the side surface of the battery case 110 in the first direction toward the other direction of the first direction.

[0054] In one embodiment, the first frame 210 may not contact one side end E1 and the other side end E2 in the second direction of a side surface in the first direction of the battery case 110, and thus does not press or fix one side end E1 and the other side end E2 of the side surface in the first direction of the battery case 110 toward the other direction of the first direction.

[0055] The first base 212 may include a pair of first anti-pressure grooves H1.

[0056] A pair of first anti-pressure grooves H1 may be respectively provided on one side and the other side of the first pressure surface S1 in the second direction and be recessed in one direction of the first direction.

[0057] The pair of first anti-pressure grooves H1 may respectively face one side end E1 and another side end E2 in the second direction of one side surface in the first direction of the battery case 110 in the first direction.

[0058] The first frame 210 can avoid contacting the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery case 110 through a pair of first anti-pressure grooves H1, thereby not applying pressure or fixing the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery case 110 toward the other direction of the first direction.

[0059] In one embodiment, the first frame 210 may include a first one side supporter 214 a and a first other side supporter 214 b .

[0060] The first one side support 214 a may be disposed on one side in the second direction of the first anti-stress groove H1 located on one side in the second direction of the first pressure surface S1 among the pair of first anti-stress grooves H1 .

[0061] The first side support 214 a may be coupled to the first base 212 .

[0062] The first one side support 214 a may face or contact one side surface of the battery cell in the second direction.

[0063] The first other-side support 214 b may be disposed on the other side in the second direction of the first anti-stress grooves H1 located on the other side in the second direction of the first pressure surface S1 among the pair of first anti-stress grooves H1 .

[0064] The first other-side supporter 214 b may be coupled to the first base 212 .

[0065] The first other side supporter 214 b may face or contact the other side surface of the battery cell 100 in the second direction.

[0066] In one embodiment, the first frame 210 may include a first support member 214 .

[0067] The first support member 214 may be disposed on one side in the second direction of the first anti-stress groove H1 located 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-stress groove H1 located on the other side in the second direction of the first pressure surface S1.

[0068] The first support 214 may be coupled to the first base 212 .

[0069] The first supporter 214 may face or contact one side surface or the other side surface of the battery cell 100 in the second direction.

[0070] In one embodiment, the battery housing 110 may include a first housing member 110 a and a second housing member 110 b .

[0071] The first housing member 110 a may extend in the second direction and a third direction crossing the first direction and the second direction.

[0072] The second housing member 110 b may be disposed on one side of the first housing member 110 in the first direction.

[0073] The second housing member 110 b may cover the first housing member 110 a .

[0074] The electrode assembly 120 may be accommodated between the first case member 110 a and the second case member 110 b .

[0075] The first housing member 110 a may include a first receiving portion 112 a and a first extending portion 114 a .

[0076] The second housing member 110 b may include a second receiving portion 112 b and a second extending portion 114 b .

[0077] The first receiving portion 112 a and the second receiving portion 113 b may face or contact each other to provide an receiving space AS in which the electrode assembly 120 is received.

[0078] The first extension portion 114 a and the second extension portion 114 b may extend outward from the first receiving portion 112 a and the second receiving portion 112 b , respectively, in at least one direction or the other direction of the second direction.

[0079] The first extension portion 114 a and the second extension portion 114 b may at least partially surround the first receiving portion 112 a and the second receiving portion 112 b , respectively.

[0080] The first extension portion 114 a and the second extension portion 114 b may be bonded to each other.

[0081] The second receiving portion 112 b may protrude more than the second extending portion 114 b in one direction of the first direction.

[0082] The first pressure surface S1 may contact one side surface of the second accommodation portion 112 b in the first direction.

[0083] The first anti-pressure groove H1 may face one side end E1 and another side end E2 in the second direction of one side surface of the second accommodation portion 112 b in the first direction in the first direction.

[0084] The first frame 210 can press and fix the second accommodating portion 112b of the battery cell 100 toward the other direction of the first direction through the first pressure surface S1, and at the same time, does not contact the one side end E1 or the other side end E2 in the second direction of the one side surface of the second accommodating portion 112b in the first direction through the first anti-pressure groove H1, thereby not pressing or fixing the one side end E1 or the other side end E2 in the second direction of the one side surface of the second accommodating portion 112b in the first direction toward the other direction of the first direction.

[0085] The first support 214 may face or contact one side surface or the other side surface of the second receiving portion 112 b in the second direction.

[0086] The first support member 214 may be in contact with one side surface of the second extension portion 114 b in the first direction.

[0087] The first frame 210 may press and fix the second extension portion 114 b of the battery cell 100 toward the other direction of the first direction through the first support member 214 .

[0088] In one embodiment, the battery housing 110 may include a first housing member 110 a and a second housing member 110 b .

[0089] The first housing member 110 a may extend in the second direction and a third direction crossing the first direction and the second direction.

[0090] The second case member 110 b may be disposed on one side of the first case member 110 in the first direction and cover the first case member 110 a .

[0091] The electrode assembly 120 may be accommodated between the first case member 110 a and the second case member 110 b .

[0092] The first case member 110 a and the second case member 110 b may include a first receiving portion 112 a and a second receiving portion 112 b , respectively.

[0093] The first receiving portion 112 a and the second receiving portion 112 b may face or contact each other to provide an receiving space AS in which the electrode assembly 120 is received.

[0094] A width W1 of the accommodating space AS in the second direction is greater than a width W2 of the electrode assembly 120 in the second direction.

[0095] Therefore, 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 receiving portion 112 b may not be supported in the first direction.

[0096] The first frame 210 can contact a side surface of the second accommodating portion 112b in the first direction to press and fix the battery cell 100 in the other direction of the first direction, while not contacting a side end E1 or another side end E2 in the second direction of a side surface of the battery case in the first direction, thereby not pressing or fixing one side end E1 or another side end E2 in the second direction in the other direction of the first direction.

[0097] In one embodiment, one end or the other end of the second housing member 110 b in the second direction may be connected to one end or the other end of the first housing member 110 a in the second direction.

[0098] The rest of the second case member 110 b except for one end or the other end of the second case member 110 b may be separated from the first case member 110 a .

[0099] The second case member 110 b may be folded relative to the first case member 110 a to face and cover the first case member 110 a in the first direction.

[0100] The second receiving portion 112 b may have a concave shape to receive at least a portion of the electrode assembly 120 .

[0101] Therefore, a predetermined space PS2 constituting at least a part of the accommodation space AS may be defined.

[0102] The width W1' of the predetermined space PS2 in the accommodating space AS in the second direction may be greater than the width W2 of the electrode assembly 120 in the second direction to prevent interference between the second accommodating portion 112b and the electrode assembly 120 when the second shell part 110b is folded relative to the first shell part 110a when the electrode assembly 120 is disposed in the first accommodating portion 112a.

[0103] Therefore, 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 receiving portion 112 b is not supported by the electrode assembly 120 in the first direction.

[0104] In one embodiment, the length in the second direction of a side end E1 or the other side end E2 of a side surface in the first direction of the battery housing 110 that is not in contact with the first frame 210 is equal to or greater than 1 / 40 of the length in the second direction of a side surface in the first direction of the battery housing 110, and is equal to or less than 1 / 5 of the length in the second direction of a side surface in the first direction of the battery housing 110.

[0105] [Beneficial Effects]

[0106] According to an embodiment of the present invention, a battery cell fixing device for fixing a battery cell 100 including a battery shell 110 and an electrode assembly 120 accommodated in the battery shell 110 may include a first frame 210, which contacts a side surface of the battery shell 110 in a first direction to press and fix the battery cell 100 in another direction toward the first direction, while not contacting a side end E1 or another side end E2 of a side surface of the battery shell in a second direction intersecting the first direction, thereby not pressing or fixing a side end E1 or another side end E2 of a side surface of the battery shell in the first direction in the second direction toward the other direction of the first direction.

[0107] Therefore, since the first frame 210 applies pressure to the central portion in the second direction between the one side end E1 in the second direction and the other side end E2 of the one side surface in the first direction of the battery case 110 toward the other direction of the first direction, the battery cell 100 can be stably fixed. Therefore, i) the battery cell 100 can be stably transported to the working area of ​​one or more processes, ii) with the battery cell 100 stably fixed, certain tasks can be smoothly performed in one or more processes, and iii) the correct shape of the battery case 110 can be stably maintained when the electrode assembly 120 is accommodated inside the battery case 110.

[0108] In addition, since the first frame 210 does not apply pressure to one side end E1 or the other side end E2 in the second direction of the one side surface in the first direction of the battery housing 110 toward the other direction of the first direction, deformation of the edge portion of the one side or the other side in the second direction of the battery housing 110 caused by the pressure applied by the first frame 210 can be prevented, and this deformation may not be restored even after the pressure stops. In particular, when the edge portion of the battery housing 110 is subjected to pressure from the battery cell fixing device 200, due to the design tolerance, assembly tolerance or alignment error of the battery cell 100 or the battery cell fixing device 200, the edge portion of the battery housing 110 may be deformed to the extent that it is difficult for the edge portion of the battery housing 110 to return to its original shape. Therefore, it is preferred that the edge portion of the battery housing 110 is not subjected to the pressure of the battery cell fixing device 200.

[0109] Therefore, it is possible to prevent external defects of the battery case 110 caused by pressure applied by the battery cell fixing apparatus 200. As a result, it is possible to reduce a defect rate of the battery cell 100, thereby reducing the manufacturing cost of the battery cell 100.

[0110] In addition, since the first frame 210 does not pressurize one side end E1 or the other side end E2 in the second direction of one side surface in the first direction of the battery case 110, external defects of the battery case 110 due to pressure applied by the battery cell fixing device 200 can be prevented despite the increase in thickness of the battery case 110. Therefore, external defects can be prevented and the durability of the battery case 110 can be improved.

[0111] According to an embodiment of the present invention, the battery cell fixing device may also include a second frame 220, which is configured to clamp the battery cell 100 facing the first frame 210, and the second frame 220 contacts the other side surface of the battery shell 110 in the first direction on the other side of the first direction of the one side surface of the battery shell 110, so as to press and fix the battery cell 100 in one direction of the first direction, while not contacting the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery shell 110 in the first direction, so as not to press or fix the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery shell 110 in one direction of the first direction.

[0112] Therefore, since the first frame 210 and the second frame 220 press the central portion in the second direction between one side surface in the first direction and the other side surface of the battery case 110 and the other side ends E1 and E3 in the second direction and the other side ends E2 and E4 in the second direction, the battery cell 100 can be stably fixed.

[0113] In addition, since the first frame 210 and the second frame 220 do not apply pressure to one side surface in the first direction and one side end E1 and E3 or the other side end E2 and E4 in the second direction of the other side surface of the battery case 110 toward the other direction and / or one direction of the first direction, deformation of the edge portion of the battery case 110 on one side or the other side in the second direction caused by the pressure applied by the first frame 210 and the second frame 220 can be prevented, and such deformation may not be restored even after the pressure stops.

[0114] Therefore, it is possible to prevent external defects of the battery case 110 caused by pressure applied by the battery cell fixing apparatus 200. As a result, it is possible to reduce a defect rate of the battery cell 100, thereby reducing the manufacturing cost of the battery cell 100.

[0115] In particular, even when one of the first frame 210 and the second frame 220 is fixed and the fixed frame relatively presses the battery cell 100 due to the pressure of the other frame, the fixed first frame 210 or the second frame 220 does not press the edge portion of one side or the other side in the second direction of the battery case 110. Therefore, external defects of the battery case 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented.

[0116] In addition, since the first frame 210 and the second frame 220 do not press one side surface in the first direction and one side end E1 and E3 or the other side end E2 and E4 in the second direction of the other side surface of the battery case 110 toward the other direction and / or one direction of the first direction, external defects of the battery case 110 due to the pressure applied by the battery cell fixing device 200 can be prevented despite the increase in thickness of the battery case 110. Therefore, external defects can be prevented and the durability of the battery case 110 can be improved.

[0117] According to an embodiment of the present invention, the other end in the second direction of one side end E1 on the second direction of the side surface of the battery housing 110 that does not contact the first frame 210 and the other end in the second direction of one side end E3 on the second direction of the other side surface of the battery housing 110 that does not contact the second frame 220 may intersect at an imaginary straight line L1 extending in the first direction, or one end in the second direction of the other side end E2 on the second direction of the side surface of the battery housing 110 that does not contact the first frame 210 and one end in the second direction of the other side end E4 on the second direction of the other side surface of the battery housing 110 that does not contact the second frame 220 may intersect at an imaginary straight line L2 extending in the first direction.

[0118] Therefore, the boundaries where the first frame 210 and the second frame 220 press the one side surface and the other side surface of the battery case 110 in the first direction toward the other direction and one direction, respectively, may correspond to each other. Therefore, since the areas where the battery cell fixing device 200 presses the one side surface and the other side surface of the battery case 110 in the first direction correspond to each other, the battery cell fixing device 200 may stably fix the battery cell 100.

[0119] According to an embodiment of the present invention, the first frame 210 may include a first base 212 disposed on one side of the battery cell 100 in the first direction. The first base 212 may include a first pressure surface S1 and a first anti-pressure groove H1, the first pressure surface S1 contacts one side surface of the battery case 110 in the first direction, the first anti-pressure groove H1 is disposed on one side or the other side of the first pressure surface S1 in the second direction, the first anti-pressure groove H1 is recessed in one direction of the first direction, and faces one side end E1 or the other side end E2 in the second direction of one side surface of the battery case 110 in the first direction in the first direction. The first frame 210 may press and fix the battery cell 100 toward the other direction of the first direction through the first pressure surface S1, while not contacting one side end E1 or the other side end E2 in the second direction of one side surface of the battery case 110 in the first direction through the first anti-pressure groove H1, and thus not press or fix one side end E1 or the other side end E2 in the second direction of one side surface of the battery case 110 in the first direction toward the other direction of the first direction. The second frame 220 may include a second base 222 disposed on the other side of the battery cell 100 in the first direction. The second base 222 may include a second pressure surface S2 and a second anti-pressure groove H2, the second pressure surface S2 contacts the other side surface of the battery case 110 in the first direction, the second anti-pressure groove H2 is disposed on one side or the other side of the second pressure surface S2 in the second direction, the second anti-pressure groove H2 is recessed in the other direction of the first direction, and faces the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction in the first direction. The second frame 220 may press and fix the battery cell 100 toward one direction of the first direction through the second pressure surface S2, while not contacting the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction through the second anti-pressure groove H2, and thus does not press or fix the one side end E3 or the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction toward one direction of the first direction.

[0120] Therefore, the first frame 210 and the second frame 220 that press both sides of the battery case 110 in the first direction without pressing and fixing the edge portion of one or the other side of the battery case 110 in the second direction can be easily manufactured at low cost with a simple structure.

[0121] In addition, by setting the first anti-pressure groove H1 and the second anti-pressure groove H2 of the first frame 210 and the second frame 220 to face the edge portion on one side or the other side in the second direction of the battery case 110, the edge portion on one side or the other side of the battery case 110 can be covered by the first frame 210 and the second frame 220 even when the edge portion is not pressed and fixed by the first frame 210 and the second frame 220. Therefore, the edge portion on one side or the other side in the second direction of the battery case 110 that is not pressed and fixed by the first frame 210 and the second frame 220 can also be protected from external impact by the first frame 210 and the second frame 220, thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0122] According to an embodiment of the present invention, the first frame 210 may not contact one side end E1 or the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110, and thus does not press or fix one side end E1 and the other side end E2 of one side surface in the first direction of the battery housing 110 toward the other direction of the first direction. The first base 212 may include a pair of first anti-pressure grooves H1 respectively disposed on one side and the other side in the second direction of the first pressure surface S1, the pair of first anti-pressure grooves H1 being recessed in one direction of the first direction and facing one side end E1 and the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110, respectively. The first frame 210 may not contact one side end E1 and the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110 through the pair of first anti-pressure grooves H1, and thus does not press or fix one side end E1 and the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110 toward the other direction of the first direction. The second frame 220 may not contact one side end E3 and one side end E4 in the second direction of the other side surface of the battery housing 110 in the first direction, and thus does not press or fix one side end E3 and one side end E4 of the other side surface of the battery housing 110 in the first direction toward one direction of the first direction. The second base 222 may include a pair of first anti-pressure grooves H2 respectively arranged on one side and the other side of the second direction of the second pressure surface S2, the pair of second anti-pressure grooves H2 being recessed in the other direction of the first direction, and facing one side end E3 and one side end E4 of the other side surface of the battery housing 110 in the first direction, respectively. The second frame 210 may not contact one side end E3 and one side end E4 in the second direction of the other side surface of the battery housing 110 in the first direction through the pair of second anti-pressure grooves H2, and thus does not press or fix one side end E3 and one side end E4 of the other side surface of the battery housing 110 in the first direction toward one direction of the first direction.

[0123] Therefore, since the first frame 210 and the second frame 220 do not apply pressure to one side surface in the first direction and one side end E1, E3 or the other side end E2, E4 in the second direction of the other side surface of the battery housing 110 in the other direction and one direction respectively, the deformation of the two edge portions in the second direction of the battery housing 110 caused by the pressure applied by the first frame 210 and the second frame 220 can be prevented, and this deformation may not be restored even after the pressure stops. Therefore, the external defects of the battery housing 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented. As a result, the defect rate of the battery cell 100 can be reduced, thereby reducing the manufacturing cost of the battery cell 100.

[0124] In addition, the first frame 210 and the second frame 220 that fix the battery cell 100 by pressing the battery case 110 while not pressing and fixing both edge portions in the second direction of the battery case 110 can be easily manufactured with a simple structure at low cost.

[0125] In addition, since 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 arranged to face the two edge portions in the second direction of the battery case 110, even when the two edge portions in the second direction of the battery case 110 are not pressed and fixed by the first frame 210 and the second frame 220, the two edge portions in the second direction of the battery case 110 can be covered by the first frame 210 and the second frame 220. Therefore, the two edge portions on one side or the other side in the second direction of the battery case 110 that are not pressed and fixed by the first frame 210 and the second frame 220 can also be protected from external impacts, etc. by the first frame 210 and the second frame 220, thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0126] According to an embodiment of the present invention, the first frame 210 may include a first base 212 disposed on one side in the first direction of the battery cell 100. The first base 212 may include a first pressure surface S1 and a first anti-pressure groove H1, the first pressure surface S1 contacts one side surface of the battery case 110 in the first direction, the first anti-pressure groove H1 is disposed on one side or the other side of the first pressure surface S1 in the second direction, the first anti-pressure groove H1 is recessed in one direction of the first direction, and faces one side end E1 or the other side end E2 in the second direction of one side surface of the battery case 110 in the first direction.

[0127] Therefore, the first frame 210 that fixes the battery cell 100 by pressing the battery case 110 without pressing and fixing the edge portion of one or the other side of the battery case 110 in the second direction can be easily manufactured with a simple structure at low cost.

[0128] In addition, by setting the first anti-pressure groove H1 of the first frame 210 to face the edge portion on one side or the other side of the battery case 110 in the second direction, even when the edge portion on one side or the other side of the battery case 110 is not pressed and fixed by the first frame 210 and the second frame 220, the edge portion can be covered by the first frame 210. Therefore, the edge portion on one side 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 impacts, etc. by the first frame 210, thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0129] 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 anti-pressure groove H1 extend along one side surface of the battery case 110 in the first direction in the third direction.

[0130] Therefore, when the edge portion of one side or the other side of the battery housing 110 in the second direction to which one side end E1 or the other side end E2 of one side surface in the first direction of the battery housing 110 belongs extends in the third direction, the first frame 210 can be prevented from applying pressure to the entire edge portion of one side or the other side in the second direction of the battery housing 110 extending in the third direction. Therefore, irreversible deformation of the entire edge portion of one side or the other side in the second direction of the battery housing 110 can be prevented. Therefore, external defects of the battery housing 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented. As a result, the defect rate of the battery cell 100 can be reduced, thereby reducing the manufacturing cost of the battery cell 100.

[0131] According to an embodiment of the present invention, the first base 212 may include a third anti-pressure groove H3 disposed on one side or the other side of the first pressure surface S1 in a third direction intersecting the first direction and the second direction, the third anti-pressure groove H3 being recessed in one direction of the first direction and facing one side end or the other side end in the third direction of one side surface of the battery housing 110 in the first direction in the first direction. The first frame 210 may press and fix the battery cell 100 toward the other direction of the first direction through the first pressure surface S1, while not contacting one side end or the other side end in the third direction of one side surface of the battery housing 110 in the first direction through the third anti-pressure groove H3, and thus not press or fix one side end or the other side end in the third direction of one side surface of the battery housing 110 in the first direction toward the other direction of the first direction.

[0132] Therefore, since the first frame 210 does not apply pressure to one side end and the other side end in the third direction of the one side surface of the battery case 110 in the first direction in the other direction of the first direction, deformation of the edge portion of the battery case 110 on one side or the other side in the third direction caused by the pressure applied by the first frame 210 can be prevented, and such deformation may not be restored even after the pressure stops.

[0133] In addition, even when the edge portion of one side or the other side of the battery case 110 is not pressed and fixed by the first frame 210 and the second frame 220, the edge portion can be covered by the first frame 210. Therefore, the edge portion of one side or the other side in the second direction of the battery case 110 that is not pressed and fixed by the first frame 210 can also be protected by the first frame 210 from external impact, etc., thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0134] According to an embodiment of the present invention, the first frame 210 may not contact one side end E1 and the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110, and thus may not press or fix one side end E1 and the other side end E2 of one side surface in the first direction of the battery housing 110 toward the other direction of the first direction. The first base 212 may include a pair of first anti-pressure grooves H1 respectively disposed on one side and the other side in the second direction of the first pressure surface S1, the pair of first anti-pressure grooves H1 being recessed in one direction of the first direction and facing one side end E1 and the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110, respectively. The first frame 210 may not contact one side end E1 and the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110 through the pair of first anti-pressure grooves H1, and thus may not press or fix one side end E1 or the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110 toward the other direction of the first direction.

[0135] Therefore, since the first frame 210 does not press the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery housing 110 toward the other direction of the first direction, the deformation of the two edge portions in the second direction of the battery housing 110 caused by the pressure applied by the first frame 210 can be completely prevented, and this deformation may not be restored even after the pressure stops. Therefore, the external defects of the battery housing 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented. As a result, the defect rate of the battery cell 100 can be reduced, thereby reducing the manufacturing cost of the battery cell 100.

[0136] In addition, the first frame 210 that fixes the battery cell 100 by pressing the battery case 110 while not pressing and fixing both edge portions in the second direction of the battery case 110 may be easily manufactured with a simple structure at low cost.

[0137] In addition, since the pair of first anti-pressure grooves H1 of the first frame 210 are arranged to face the two edge portions in the second direction of the battery case 110, even when the two edge portions in the second direction of the battery case 110 are not pressed and fixed by the first frame 210, the two edge portions in the second direction of the battery case 110 can be covered by the first frame 210. Therefore, the two edge portions on one side or the other side in the second direction of the battery case 110 that are not pressed and fixed by the first frame 210 can also be protected by the first frame 210 from external impacts, etc., thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0138] According to an embodiment of the present invention, the first frame 210 may include a first one side support 214a and a first other side support 214b, the first one side support 214a being arranged on one side in the second direction of the first anti-pressure groove H1 located on one side in the second direction of the first pressure surface S1 in a pair of first anti-pressure grooves H1, wherein the first one side support 214a is coupled to the first base 212 and faces or can contact one side surface of the battery cell 100 in the second direction in the second direction; the first other side support 214b is arranged on the other side in the second direction of the first anti-pressure groove H1 located on the other side in the second direction of the first pressure surface S1 in a pair of first anti-pressure grooves H1, wherein the first other side support 214b is coupled to the first base 212 and faces or can contact the other side surface of the battery cell 100 in the second direction in the second direction.

[0139] Therefore, it is possible to prevent the battery cell 100 from moving in one direction and the other direction of the second direction or prevent the battery cell 100 from being separated from the first frame 210 in one direction and the other direction of the second direction.

[0140] In addition, the first frame 210 can be easily manufactured at low cost with a simple structure, which fixes the battery cell 100 by applying pressure to the battery housing 110 while not applying pressure to the two edge portions of the battery housing 110 in the second direction, and prevents the battery cell 100 from moving in one direction and another direction of the second direction or prevents the battery cell 100 from detaching from the first frame 210 in one direction and another direction of the second direction.

[0141] According to an embodiment of the present invention, the first frame 210 may include a first support member 214, which is coupled to the first base 212 and faces or contacts one side surface or the other side surface of the battery cell 100 in the second direction, wherein the first support member 214 is arranged on one side in the second direction of the first anti-pressure groove H1 located on one side in the second direction of the first pressure surface S1, or is arranged on the other side in the second direction of the first anti-pressure groove H1 located on the other side in the second direction of the first pressure surface S1.

[0142] Therefore, it is possible to prevent the battery cell 100 from moving in one direction and the other direction of the second direction or prevent the battery cell 100 from being separated from the first frame 210 in one direction and the other direction of the second direction.

[0143] In addition, the first frame 210 can be easily manufactured at low cost with a simple structure, and the first frame 210 fixes the battery cell 100 by applying pressure to the battery housing 110 while not applying pressure and fixing the edge portion of the battery housing 110 on one side or the other side in the second direction, and prevents the battery cell 100 from moving in one direction or the other direction of the second direction or detaching from the first frame 210 in one direction or the other direction of the second direction.

[0144] According to an embodiment of the present invention, the battery case 110 may include a first case member 110a and a second case member 110b, the first case member 110a extends in a second direction and a third direction intersecting the first direction and the second direction, and the second case member 110b is disposed on one side of the first case member 110a in the first direction and covers the first case member 110a. The electrode assembly 120 is accommodated between the first case member 110a and the second case member 110b. The first case member 110a may include a first accommodation portion 112a and a first extension portion 114a. The second case member 110b may include a second accommodation portion 112b and a second extension portion 114b. The first accommodation portion 112a and the second accommodation portion 112b face or contact each other to provide an accommodation space AS for accommodating the electrode assembly 120. 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 in at least one direction or another direction of the second direction, respectively, and the first extension portion 114a and the second extension portion 114b respectively at least partially surround the first accommodating portion 112a and the second accommodating portion 112b, and are capable of bonding to each other. The second accommodating portion 112b protrudes more than the second extension portion 114b in one direction of the first direction. The first pressure surface S1 may contact a side surface of the second accommodating portion 112b in the first direction. The first anti-pressure groove H1 faces a side end E1 or another side end E2 in the second direction of a side surface of the second accommodating portion 112b in the first direction. The first frame 210 can press and fix the second receiving portion 112b of the battery cell 100 toward the other direction of the first direction through the first pressure surface S1, and at the same time, it does not contact the one side end E1 or the other side end E2 in the second direction of the one side surface of the second receiving portion 112b in the first direction through the first anti-pressure groove H1, so it does not press or fix the one side end E1 or the other side end E2 in the second direction of the one side surface of the second receiving portion 112b in the first direction toward the other direction of the first direction. The first support member 214 faces or can contact the one side surface or the other side surface of the second receiving portion 112b in the second direction, and can contact the one side surface of the second extension portion 114b in the first direction. The first frame 210 can press and fix the second extension portion 114b of the battery cell 100 toward the other direction of the first direction through the first support member 214.

[0145] Therefore, since the first frame 210 presses the second accommodating portion 112b and the second extending portion 114b of the battery cell 100 in the other direction of the first direction, the first frame 210 can stably fix the battery cell 100, and the battery case 110 can maintain a correct shape with the electrode assembly 120 accommodated in the battery case 110.

[0146] In addition, the first frame 210 , which may stably fix the battery cell 100 and allow the battery case 110 to maintain a correct shape with the electrode assembly 120 accommodated inside the battery case 110 , may be easily manufactured with a simple structure at low cost.

[0147] According to an embodiment of the present invention, the battery case 110 may include a first case member 110a and a second case member 110b, the first case member 110a extending in a second direction and a third direction intersecting the first direction and the second direction, and the second case member 110b being disposed on one side of the first case member 110a in the first direction and covering the first case member 110a. The electrode assembly 120 is accommodated between the first case member 110a and the second case member 110b. The first case member 110a and the second case member 110b respectively include a first accommodation portion 112a and a second accommodation portion 112b, which face or contact each other to provide an accommodation space AS for accommodating the electrode assembly 120. The width W1 of the accommodation space AS in the second direction is greater than the width W2 of the electrode assembly 120 in the second direction, so that at least a portion of one side end E1 or the other side end E2 in the second direction of a one side surface of the second accommodation portion 112b in the first direction is not supported by the electrode assembly 120 in the first direction. The first frame 210 can contact a side surface of the second accommodating portion 112b in the first direction to press and fix the battery cell 100 in the other direction of the first direction, while not contacting a side end E1 or another side end E2 in the second direction of a side surface of the battery case in the first direction, thereby not pressing or fixing one side end E1 or another side end E2 in the second direction in the other direction of the first direction.

[0148] Therefore, even when 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 receiving portion 112b is not supported in the first direction, the first frame 210 does not press the edge portion of one side or the other side in the second direction of the second receiving portion 112b toward the other direction of the first direction. Therefore, external defects of the battery case 110 caused by pressure applied by the battery cell fixing device 200 can be prevented.

[0149] According to an embodiment of the present invention, the second housing member 110b may be folded relative to the first housing member 110a to face and cover the first housing member 110a in the first direction, wherein one end or the other end of the second housing member 110b is connected to one end or the other end of the first housing member 110a in the second direction, and the other portion of the second housing member 110b except for one end or the other end of the second housing member 110b may be separated from the first housing member 110a. The second accommodation portion 112b has a concave shape defining a predetermined space PS2, which constitutes at least a portion of the accommodation space AS for accommodating at least a portion of the electrode assembly 120. In order to prevent interference between the second accommodating portion 112b and the electrode assembly 120 when the second shell part 110b is folded relative to the first shell part 110a when the electrode assembly 120 is arranged in the first accommodating portion 112a, the width W1' of the predetermined space PS2 of the accommodating space AS in the second direction is greater than the width W2 of the electrode assembly 120 in the second direction, so that at least a portion of the one side end E1 or the other side end E2 in the second direction of a side surface of the second accommodating portion 112b in the first direction is not supported by the electrode assembly 120 in the first direction.

[0150] Therefore, when the second case member 110b connected to the end of the first case member 110a is folded to cover the first receiving portion 112a with the second receiving portion 112b, in order to prevent interference between the second receiving portion 112b and the electrode assembly 120, the width W1' of the predetermined space PS2 of the second receiving portion 112b in the receiving space AS in the second direction is selected to be greater than the width W2 of the electrode assembly 120 in the second direction. As a result, even when at least a portion of the edge portion on one side or the other side in the second direction of the second receiving portion 112b is not supported by the electrode assembly 120 in the first direction, the first frame 210 does not press the edge portion on one side or the other side in the second direction of the second receiving portion 112b toward the other direction of the first direction, thereby preventing external defects of the battery case 110 due to the pressure applied by the battery cell fixing device 200.

[0151] According to an embodiment of the present invention, the length in the second direction of one side end E1 or the other side end E2 in the second direction of the side surface in the first direction of the battery housing 110 that does not contact the first frame 210 is equal to or greater than 1 / 40 of the length in the second direction of the side surface in the first direction of the battery housing 110 and is equal to or less than 1 / 5 of the length.

[0152] Therefore, since the length in the second direction of one side end E1 or the other side end E2 of the one side surface in the first direction that does not contact the first frame 210 is not less than 1 / 40 of the length in the second direction of the one side surface in the first direction of the battery housing 110, the area of ​​the edge portion of one side or the other side in the second direction of the battery housing 110 that is not pressed by the first frame 210 is sufficiently realized to prevent external defects of the battery housing 110. In addition, since the length in the second direction of one side end E1 or the other side end E2 of the one side surface in the first direction that does not contact the first frame 210 is not greater than 1 / 5 of the length in the second direction of the one side surface in the first direction of the battery housing 110, the area of ​​the battery housing 110 that can be pressed by the first frame 210 is sufficiently realized to stably fix the battery cell 100.

[0153] In addition to the above-described effects, specific effects of the present invention will be described in conjunction with the following specific embodiments for implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0154] Figure 1 and Figure 2 is a perspective view schematically illustrating a battery cell and a battery cell fixing apparatus according to an embodiment of the present invention.

[0155] Figure 3 and Figure 4 yes Figure 1 and Figure 2 Exploded perspective view of.

[0156] Figure 5 yes Figure 1 and Figure 2 A side view of a battery cell and a battery cell fixing device.

[0157] Figure 6 yes Figure 1 and Figure 2 A side cross-sectional view of a battery cell and a battery cell fixing device.

[0158] Figure 7 yes Figures 1 to 6 An exploded perspective view of a battery cell.

[0159] Figure 8 It shows that when the battery case is bent Figure 7 A diagram illustrating an interference state between a battery case of a battery cell and an electrode assembly disposed inside the battery case.

[0160] 100: Battery Cell

[0161] 110: Battery housing

[0162] 110a: first housing member 110b: second housing member

[0163] 112a: first storage portion 112b: second storage portion

[0164] 114a: first extension portion 114b: second extension portion

[0165] 120: Electrode assembly 122: Terminal

[0166] 200: Battery cell fixing equipment

[0167] 210: First frame 220: Second frame

[0168] 212: First base 222: Second base

[0169] 214: first support member 224: second support member

[0170] S1: first pressure surface S2: second pressure surface

[0171] H1: First anti-pressure groove H2: Second anti-pressure groove

[0172] H3: The third anti-pressure groove H4: The fourth anti-pressure groove DETAILED DESCRIPTION

[0173] 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 to which the present invention belongs will be able to easily implement the technical ideas of the present invention. When describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. The preferred embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used to represent the same or similar elements.

[0174] Although "first", "second", etc. may be used to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish one element from another element, and unless otherwise specified, the first element may of course be the second element.

[0175] Throughout the specification, unless otherwise specified, each element may be in the singular or in the plural.

[0176] Hereinafter, the arrangement of any element on the "upper (or lower)" or "upper (or lower)" of an element means that the arbitrary element is placed in contact with the upper (or lower) surface of the element. In addition, it may mean that other elements may be placed between the element and any element disposed on (or below) the element.

[0177] In addition, when an element is described as being “linked,” “coupled” or “connected” to another element, the elements may be directly connected or connected to each other, but other elements may be “interposed” between the elements, or the elements may be “linked,” “coupled” or “connected” through other elements.

[0178] Unless the context clearly dictates otherwise, singular expressions used herein include plural expressions. In the present application, terms such as "consisting of" or "comprising" should not be interpreted as necessarily including all the various elements or steps described in the specification. It should be interpreted that some elements or some steps may not be included, or additional elements or steps may be further included.

[0179] Meanwhile, the predetermined space PS2 described in the claims may be a second predetermined space PS2 described later.

[0180] Figure 1 and Figure 2 is a perspective view schematically illustrating a battery cell and a battery cell fixing apparatus according to an embodiment of the present invention. Figure 3 and Figure 4 yes Figure 1 and Figure 2 Exploded perspective view of. Figure 5 yes Figure 1 and Figure 2 A side view of a battery cell and a battery cell fixing device. Figure 6 yes Figure 1 and Figure 2 A side cross-sectional view of a battery cell and a battery cell fixing device. Figure 7 yes Figures 1 to 6 An exploded perspective view of a battery cell. Figure 8 It shows that when the battery case is bent Figure 7 A diagram illustrating an interference state between a battery case of a battery cell and an electrode assembly disposed inside the battery case.

[0181] [Battery unit]

[0182] Reference Figures 1 to 8 , a battery cell 100 according to one embodiment may include a battery case 110 and an electrode assembly 120 .

[0183] [Battery case]

[0184] The battery case 110 may include a first case member 110a and a second case member 110b. The battery case 110 may be made of a material including aluminum, for example.

[0185] [First housing member]

[0186] The first housing member 110a may extend in a second direction (eg, front-rear direction) and a third direction (eg, left-right direction). Here, the second direction may intersect the first direction (eg, up-down direction), and the third direction may intersect the first and second directions.

[0187] The first housing member 110a may include a first receiving portion 112a. The first housing member 110a may include a first extending portion 114a.

[0188] The first receiving portion 112a may face or contact the second receiving portion 112b of the second case member 110b to provide an accommodation space AS (hereinafter referred to as an accommodation space) for accommodating the electrode assembly 120. Figure 6 ).

[0189] The first receiving portion 112a may have a concave shape to receive at least a portion of the electrode assembly 120. As a result, the first receiving portion 112a may have a concave shape to receive at least a portion of the electrode assembly 120. Therefore, a first predetermined space PS1 (for example, a lower half of the receiving space) constituting at least a portion of the receiving space AS may be defined by the concave first receiving portion 112a. Figures 6 to 8 ).

[0190] However, it is not limited to this structure. For example, the first receiving portion 112a may have a flat plate shape.

[0191] The first extension portion 114a extends outward from the first receiving portion 112a in at least one direction (e.g., the forward direction) or another direction (e.g., the rearward direction) of the second direction. The first extension portion 114a may at least partially surround the first receiving portion 112a. The first extension portion 114a may be bonded to the second extension portion 114b of the second housing member 110b.

[0192] The first receiving portion 112a may protrude more than the first extending portion 114a in the other direction (e.g., downward direction) of the first direction. For example, the first receiving portion 112a may have a concave shape to define the first predetermined space PS1 so that the first receiving portion 112a protrudes more than the first extending portion 114a in the other direction of the first direction.

[0193] [Second housing member]

[0194] The second housing component 110b may be placed on one side (eg, upper side) of the first housing component 110a in the first direction. The second housing component 110b may cover the first housing component 110a ( Figures 3 to 6 and Figure 8 ).

[0195] The second housing member 110b may include a second receiving portion 112b. The second housing member 110b may include a second extending portion 114b.

[0196] The second receiving portion 112b may face or contact the first receiving portion 112a of the first case member 110a to provide an accommodation space AS (hereinafter referred to as an accommodation space) for accommodating the electrode assembly 120. Figure 6 ).

[0197] The width W1 of the accommodation space AS in the second direction may be greater than the width W2 of the electrode assembly 120 in the second direction. Therefore, at least a portion of a surface end E1 on one side (e.g., the front side) or a surface end E2 on the other side (e.g., the rear side) in the second direction of one side surface (e.g., the upper side) of the second accommodation portion 112b in the first direction may not be supported in the first direction ( Figure 6 ).

[0198] For example, since the width W1 of the accommodation space AS in the second direction is greater than the width W2 of the electrode assembly 120 in the second direction, the electrode assembly 120 is spaced apart from one end (e.g., the front end) of the second accommodation portion 112b by a distance D1 in the second direction, and is spaced apart from the other end (e.g., the rear end) of the second accommodation portion 112b by a distance D2 ( Figure 6 Here, the distances D1 and D2 may be greater than the thickness of the second receiving portion 112b. Therefore, a portion corresponding to a section from one end of one side end E1 in the second direction of one side surface of the second receiving portion 112b to the distance D1 and a portion corresponding to a section from the other end of the other side end E2 in the second direction to the distance D2 may not be supported by the electrode assembly 120 in the first direction ( Figure 6 ).

[0199] As described above, since at least a portion of one side end E1 or the other side end E2 in the second direction of a side surface in the first direction of the second accommodating portion 112b is not supported in the first direction, when one end or the other end of the second accommodating portion 112b in the second direction is pressed by the first frame 210 toward the other direction of the first direction (for example, the downward direction), one end or the other end of the second accommodating portion 112b in the second direction may be easily deformed, which will be described later.

[0200] Meanwhile, the above problem may also occur in the first receiving portion 112a. That is, when the width W1 of the receiving space AS in the second direction is greater than the width W2 of the electrode assembly 120 in the second direction, at least a portion of the surface end E3 on one side (e.g., the front side) or the surface end E4 on the other side (e.g., the rear side) in the second direction of the other side surface (e.g., the lower side) in the first direction of the first receiving portion 112a is not supported by the electrode assembly 120. As a result, when the second frame 220 ( Figure 6 ) is pressed in one direction (e.g., upward) toward the first direction, one side end E3 or the other side end E4 may be easily deformed, which will be described later.

[0201] The second receiving portion 112b may have a concave shape to receive at least a portion of the electrode assembly 120. Therefore, a second predetermined space PS2 (eg, an upper half of the receiving space) constituting at least a portion of the receiving space AS may be defined by the second receiving portion 112b. Figures 6 to 8 ). However, it is not limited to this structure.

[0202] The second extension portion 114b extends outward from the second receiving portion 112b in at least one direction (e.g., the forward direction) or another direction (e.g., the rearward direction) of the second direction. The second extension portion 114b may at least partially surround the second receiving portion 112b. The second extension portion 114b may be bonded to the first extension portion 114a of the first housing member 110a.

[0203] The second receiving portion 112b may protrude more than the second extension portion 114b in one direction (e.g., upward direction) of the first direction. For example, the second receiving portion 112b has a concave shape to define a second predetermined space PS2, so that the second receiving portion 112b protrudes more than the second extension portion 114b in one direction of the first direction.

[0204] Meanwhile, one end or the other end of the second housing member 110b in the second direction may be connected to one end or the other end of the first housing member 110a in the second direction ( Figure 7 and Figure 8 ). For example, Figure 8 As shown, the other end of the second housing component 110 b in the second direction may be connected to the other end of the first housing component 110 a in the second direction.

[0205] The second housing member 110b can be separated from the first housing member 110a except for one end or the other end connected to the first housing member 110a in the second direction. Figure 7 and Figure 8 ).

[0206] The second housing component 110b may be folded relative to the first housing component 110a to face and cover the first housing component 110a in the first direction. Figure 8 For example, one end or the other end of the second housing component 110b connected to the first housing component 110a in the second direction is folded so that the second housing component 110b faces and covers the first housing component 110a in the first direction.

[0207] Here, as described above, when the second accommodation portion 112b has a concave shape to accommodate at least a portion of the electrode assembly 120 and thus defines the second predetermined space PS2 constituting at least a portion of the accommodation space AS, if the second case member 110b is folded relative to the first case member 110a with the electrode assembly 120 disposed in the first accommodation portion 112a, there may be interference between the second accommodation portion 112b having a concave shape and the electrode assembly 120. For example, Figure 8 As shown in FIG. 1 , there may be interference between the second accommodation portion 112 b and an interference portion F of the electrode assembly 120 , which is located on one side in the first direction and one side in the second direction of the electrode assembly 120 .

[0208] In order to prevent the interference of the second receiving portion 112b with the electrode assembly 120, the width W1′ ( Figure 6 and Figure 8 ) must be sufficiently larger than the width W2 of the electrode assembly 120 in the second direction. However, when the width W1' of the second predetermined space PS2 of the accommodation space AS in the second direction is larger than the width W2 of the electrode assembly 120 in the second direction, 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 accommodation portion 112b is not supported by the electrode assembly 120 in the first direction ( Figure 6 ).

[0209] That is, since the width W1' of the predetermined space PS2 of the second receiving portion 112b in the receiving space AS in the second direction must be greater than the width W2 of the electrode assembly 120 in the second direction, in order to prevent interference between the second receiving portion 112b and the electrode assembly 120 when the second housing member 110b connected to the end of the first housing member 110a is folded to cover the first receiving portion 112a with the second receiving portion 112b, 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 receiving portion 112b may inevitably not be supported in the first direction. A detailed description will be given later.

[0210] [Electrode assembly]

[0211] The electrode assembly 120 may be accommodated inside the battery case 100. Specifically, the electrode assembly 120 may be accommodated between the first case member 110a and the second case member 110b. For example, the electrode assembly 120 may be accommodated between the first accommodation portion 112a and the second accommodation portion 112b.

[0212] The electrode assembly 120 may include one or more electrodes (not shown) and one or more separators (not shown). The electrodes and the separators may be alternately stacked in a first direction.

[0213] Each electrode and each separator may extend in the second direction and the third direction. Therefore, the electrode assembly 120 may extend in the second direction and the third direction.

[0214] The electrode assembly 120 may include a pair of terminals 122. The pair of terminals 122 may protrude in the third direction.

[0215] [Battery cell fixing equipment]

[0216] Reference Figures 1 to 6 , a battery cell fixing apparatus 200 according to one embodiment may include a first frame 210 and a second frame 220 .

[0217] The battery cell fixing device 200 can fix the battery cell 100. Therefore, the battery cell fixing device 200 can be used to stably transport the battery cell 100 to a work area of ​​one or more processes, or fix the battery cell 100 and perform a predetermined work (e.g., a sealing work) in one or more processes (e.g., a sealing process).

[0218] In addition, the battery cell fixing device 200 may be used to maintain the correct shape of the battery case 110 in which the electrode assembly 120 is accommodated. Figure 7 and Figure 8 As shown, when the battery case 110 is folded to accommodate the electrode assembly 120 therein, the battery cell fixing device 200 may be used to press and fix the battery case 110 so that the battery case 110 is completely folded and maintains a correct shape with the electrode assembly 120 accommodated therein.

[0219] [First Frame]

[0220] The first frame 210 contacts one side surface (eg, upper side surface) of the battery case 110 in a first direction (eg, up and down direction), and presses and fixes the battery cell 100 toward another direction (eg, downward direction) of the first direction.

[0221] Here, the pressure may include relative pressure. The same applies below. For example, when the second frame 220 presses the battery cell 100 in one direction of the first direction, even if the first frame 210 is fixed, the first frame 210 presses the battery cell 100 relatively toward the other direction of the first direction.

[0222] Here, the first frame 210 does not contact one side (e.g., front side) surface end E1 or the other side (e.g., rear side) surface end E2 of a side surface in the first direction of the battery housing 110 in a second direction (e.g., front-to-back direction) intersecting the first direction, so that the first frame 210 can press and fix one side end E1 or the other side end E2 in the second direction of a side surface in the first direction of the battery housing 110 without pressing and fixing the other side end E1 in the other direction of the first direction.

[0223] For example, the first frame 210 may contact a side surface in the first direction of the second receiving portion 112b of the second housing component 110b of the battery housing 110 constituting a side surface in the first direction of the battery housing 110, so that the first frame 210 can press and fix the second receiving portion 112b and the battery cell 100 in the other direction of the first direction. Here, the first frame 210 may not contact a side end E1 or another side end E2 in the second direction of a side surface in the first direction of the second receiving portion 112b, so that the first frame 210 does not press and fix a side end E1 or another side end E2 in the second direction of a side surface in the first direction of the second receiving portion 112b in the other direction of the first direction ( Figure 5 and Figure 6 ).

[0224] Therefore, since the first frame 210 applies pressure to the central portion in the second direction between the one side end E1 in the second direction and the other side end E2 of the one side surface in the first direction of the battery case 110 toward the other direction of the first direction, the battery cell 100 can be stably fixed. Therefore, i) the battery cell 100 can be stably transported to a work area of ​​one or more processes, ii) with the battery cell 100 stably fixed, certain tasks can be smoothly performed in one or more processes, and iii) when the electrode assembly 120 is accommodated inside the battery case 110, the correct shape of the battery case 110 can be stably maintained.

[0225] In addition, since the first frame 210 does not apply pressure to one side end E1 or the other side end E2 in the second direction of the one side surface in the first direction of the battery housing 110 toward the other direction of the first direction, deformation of the edge portion of the one side or the other side in the second direction of the battery housing 110 caused by the pressure applied by the first frame 210 can be prevented, and this deformation may not be restored even after the pressure stops. In particular, when the edge portion of the battery housing 110 is subjected to pressure from the battery cell fixing device 200, due to the design tolerance, assembly tolerance or alignment error of the battery cell 100 or the battery cell fixing device 200, the edge portion of the battery housing 110 may be deformed to the extent that it is difficult for the edge portion of the battery housing 110 to return to its original shape. Therefore, it is preferred that the edge portion of the battery housing 110 is not subjected to pressure from the battery cell fixing device 200.

[0226] For example, when the first frame 210 applies pressure to the central portion in the second direction between one side end E1 and the other side end E2 of one side surface in the first direction of the second receiving portion 112b, although the edge portion on one side or the other side of the second receiving portion 112b to which the one side end E1 or the other side end E2 of the one side surface in the first direction of the second receiving portion 112b belongs is bent and temporarily deformed due to design tolerance, assembly tolerance, or alignment error, the first frame 210 does not apply pressure to the edge portion on one side or the other side of the second receiving portion 112b in the second direction. As a result, when pressure is applied to the central portion in the second direction of one side surface of the second receiving portion 112b in the first direction, the edge portion on one side or the other side of the second receiving portion 112b in the second direction can be restored to its original and correct shape.

[0227] Therefore, it is possible to prevent external defects of the battery case 110 caused by pressure applied by the battery cell fixing apparatus 200. As a result, it is possible to reduce a defect rate of the battery cell 100, thereby reducing the manufacturing cost of the battery cell 100.

[0228] In addition, since the first frame 210 does not pressurize one side end E1 or the other side end E2 in the second direction of one side surface in the first direction of the battery case 110, external defects of the battery case 110 due to the pressure applied by the battery cell fixing device 200 can be prevented despite the increase in thickness of the battery case 110. Therefore, external defects can be prevented and the durability of the battery case 110 can be improved.

[0229] The following is a detailed description. In general, when the amount of pressure applied to the battery housing 110 is the same, the degree to which the deformed battery housing 110 recovers to its original shape decreases as the thickness of the battery housing 110 increases. However, according to the present invention, since the first frame 210 does not apply pressure to one side end E1 or the other side end E2 in the second direction of a side surface in the first direction of the battery housing 110, the problem of the edge portion of one side or the other side of the battery housing 110 in the second direction to which the one side end E1 or the other side end E2 in the second direction of a side surface in the first direction of the battery housing 110 belongs being deformed and not recovered due to the pressure applied by the first frame 210 does not occur.

[0230] Here, as described above, the width W1 of the accommodation space AS in the second direction may be greater than the width W2 of the electrode assembly 120 in the second direction ( Figure 6 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 receiving portion 112 b may not be supported in the first direction.

[0231] Therefore, even when 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 receiving portion 112b is not supported in the first direction, the first frame 210 does not press the edge portion of one side or the other side in the second direction of the second receiving portion 112b toward the other direction of the first direction. Therefore, external defects of the battery case 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented.

[0232] On the other hand, when the first frame 210 applies pressure on at least a portion of an edge portion of 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 of a side surface in the first direction of the second accommodating portion 112b belongs toward the other direction of the first direction, the edge portion may be deformed to an extent that it is difficult for the edge portion to restore its original shape due to lack of support from the electrode assembly 120.

[0233] Here, as described above, the width W1′ of the second predetermined space PS2 in the accommodating space AS in the second direction may be greater than the width W2 of the electrode assembly 120 in the second direction to prevent interference between the second accommodating portion 112 b and the electrode assembly 120 when the second case member 110 b is bent relative to the first case member 110 a when the electrode assembly 120 is disposed in the first accommodating portion 112 a ( Figure 6 and Figure 8 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 receiving portion 112 b is not supported by the electrode assembly 120 in the first direction.

[0234] Therefore, in order to prevent interference between the second receiving portion 112b and the electrode assembly 120 when the second housing member 110b connected to the end of the first housing member 110a is folded to cover the first receiving portion 112a with the second receiving portion 112b, the width W1' of the predetermined space PS2 of the second receiving portion 112b in the receiving space AS in the second direction is selected to be greater than the width W2 of the electrode assembly 120 in the second direction. As a result, even when at least a portion of the edge portion on one side or the other side in the second direction of the second receiving portion 112b is not supported by the electrode assembly 120 in the first direction, the first frame 210 does not press the edge portion on one side or the other side in the second direction of the second receiving portion 112b toward the other direction of the first direction, thereby preventing external defects of the battery housing 110 due to the pressure applied by the battery cell fixing device 200.

[0235] At the same time, the length in the second direction of one side end E1 or the other side end E2 in the second direction of the side surface in the first direction of the battery housing 110 that does not contact the first frame 210 is equal to or greater than 1 / 40 of the length in the second direction of the side surface in the first direction of the battery housing 110 and equal to or less than 1 / 5 of the length.

[0236] For example, the length in the second direction of one side end E1 or the other side end E2 in the second direction of the one side surface in the first direction of the second accommodating portion 112b that does not contact the first frame 210 is equal to or greater than 1 / 40 of the length in the second direction of the one side surface in the first direction of the second accommodating portion 112b and is equal to or less than 1 / 5 of the length.

[0237] Therefore, since the length in the second direction of one side end E1 or the other side end E2 of the one side surface in the first direction that does not contact the first frame 210 is not less than 1 / 40 of the length in the second direction of the one side surface in the first direction of the battery housing 110, the area of ​​the edge portion of one side or the other side in the second direction of the battery housing 110 that is not pressed by the first frame 210 is fully realized to prevent external defects of the battery housing 110. In addition, since the length in the second direction of one side end E1 or the other side end E2 of the one side surface in the first direction that does not contact the first frame 210 is not greater than 1 / 5 of the length in the second direction of the one side surface in the first direction of the battery housing 110, the area of ​​the battery housing 110 that can be pressed by the first frame 210 is fully realized to stably fix the battery cell 100.

[0238] The first frame 210 may include a first base 212. The first frame 210 may include a first support 214. A description of the first base 212 and the first support 214 is as follows.

[0239] [First Pedestal]

[0240] The first base 212 may be disposed on one side of the battery cell 100 in the first direction.

[0241] The first base 212 may include a first pressure surface S1 and a first anti-pressure groove H1. The first base 212 may include a third anti-pressure groove H3 ( Figure 2 and Figure 4 ).

[0242] The first pressure surface S1 may contact one side surface in the first direction of the battery case 110. For example, the first pressure surface S1 may contact one side surface in the first direction of the second accommodation portion 112b.

[0243] The first frame 210 may press and fix the battery cell 100 toward the other direction of the first direction through the first pressure surface S1. For example, the first frame 210 may press and fix the second receiving portion 112b of the battery cell 100 toward the other direction of the first direction through the first pressure surface S1.

[0244] The first anti-pressure groove H1 may be provided on one side or the other side of the first pressure surface S1 in the second direction and be recessed in one direction of the first direction.

[0245] The first anti-pressure groove H1 may face in the first direction one side end E1 or the other side 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 side end E1 or the other side end E2 in the second direction of one side surface in the first direction of the second accommodation portion 112b.

[0246] The first frame 210 may not contact one side end E1 or the other side end E2 in the second direction of one side surface of the battery housing 110 in the first direction through the first anti-pressure groove H1, and thus does not press or fix one side end E1 or the other side end E2 in the second direction of one side surface of the battery housing 110 in the first direction toward the other direction of the first direction. For example, the first frame 210 may not contact one side end E1 or the other side end E2 in the second direction of one side surface of the second accommodating portion 112b in the first direction through the first anti-pressure groove H1, and thus does not press or fix one side end E1 or the other side end E2 in the second direction of one side surface of the second accommodating portion 112b in the first direction toward the other direction of the first direction.

[0247] Therefore, the first frame 210 that fixes the battery cell 100 by pressing the battery case 110 and not pressing and fixing the edge portion of one or the other side of the battery case 110 in the second direction can be easily manufactured with a simple structure at low cost.

[0248] In addition, by setting the first anti-pressure groove H1 of the first frame 210 to face the edge portion on one side or the other side of the battery case 110 in the second direction, even when the edge portion on one side or the other side of the battery case 110 is not pressed and fixed by the first frame 210 and the second frame 220, the edge portion can be covered by the first frame 210. Therefore, the edge portion on one side 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 impacts, etc. by the first frame 210, thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0249] At the same time, the first frame 210 may not contact the side end E1 and the other side end E2 in the second direction of the side surface in the first direction of the battery case 110, and thus does not press or fix the side end E1 and the other side end E2 in the second direction of the side surface in the first direction of the battery case 110 toward the other direction of the first direction.

[0250] Specifically, the first base 212 may include a pair of first anti-pressure grooves H1. The pair of first anti-pressure grooves H1 may be respectively disposed on one side and the other side in the second direction of the first pressure surface S1, and may be recessed in one direction in the first direction. The pair of first anti-pressure grooves H1 may respectively face one side end E1 and the other side end E2 in the second direction of one side surface in the first direction of the battery housing 110 in the first direction.

[0251] Here, the first frame 210 can be prevented from contacting the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery case 110 through a pair of first anti-pressure grooves H1, thereby not applying pressure or fixing the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery case 110 toward the other direction of the first direction.

[0252] Therefore, since the first frame 210 does not press the one side end E1 and the other side end E2 in the second direction of the one side surface in the first direction of the battery housing 110 toward the other direction of the first direction, the deformation of the two edge portions in the second direction of the battery housing 110 caused by the pressure applied by the first frame 210 can be completely prevented, and this deformation may not be restored even after the pressure stops. Therefore, the external defects of the battery housing 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented. As a result, the defect rate of the battery cell 100 can be reduced, thereby reducing the manufacturing cost of the battery cell 100.

[0253] In addition, the first frame 210 that fixes the battery cell 100 by pressing the battery case 110 while not pressing and fixing both edge portions in the second direction of the battery case 110 may be easily manufactured with a simple structure at low cost.

[0254] In addition, since the pair of first anti-pressure grooves H1 of the first frame 210 are arranged to face the two edge portions in the second direction of the battery case 110, even when the two edge portions in the second direction of the battery case 110 are not pressed and fixed by the first frame 210, the two edge portions in the second direction of the battery case 110 can be covered by the first frame 210. Therefore, the two edge portions on one side or the other side in the second direction of the battery case 110 that are not pressed and fixed by the first frame 210 can also be protected by the first frame 210 from external impacts, etc., thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0255] When one side surface of the battery case 110 in the first direction extends in a third direction intersecting the first direction and the second direction, the first pressure surface S1 and the first anti-pressure groove H1 may extend along one side surface of the battery case 110 in the first direction in the third direction ( Figures 1 to 4 ).

[0256] For example, when one side surface of the second accommodation portion 112b in the first direction extends in the third direction, the first pressure surface S1 and the first anti-pressure groove H1 may extend in the third direction along one side surface of the second accommodation portion 112b in the first direction ( Figures 1 to 4 ).

[0257] Therefore, when the edge portion of one side or the other side of the battery housing 110 in the second direction to which one side end E1 or the other side end E2 of one side surface in the first direction of the battery housing 110 belongs extends in the third direction, the first frame 210 can be prevented from applying pressure to the entire edge portion of one side or the other side in the second direction of the battery housing 110 extending in the third direction. Therefore, irreversible deformation of the entire edge portion of one side or the other side in the second direction of the battery housing 110 can be prevented. Therefore, external defects of the battery housing 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented. As a result, the defect rate of the battery cell 100 can be reduced, thereby reducing the manufacturing cost of the battery cell 100.

[0258] The third anti-pressure groove H3 may be provided on one side or the other side of the first pressure surface S1 in the third direction, and be recessed in one direction of the first direction.

[0259] The third anti-pressure groove H3 may face one side end or the other side 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 one side end or the other side end in the third direction of one side surface in the first direction of the second accommodation portion 112b in the first direction.

[0260] The first frame 210 may not contact one side end or the other side end in the third direction of the one side surface of the battery housing 110 in the first direction through the third anti-pressure groove H3, and thus does not press or fix one side end or the other side end in the third direction of the one side surface of the battery housing 110 in the first direction toward the other direction of the first direction. For example, the first frame 210 may not contact one side end or the other side end in the third direction of the one side surface of the second accommodating portion 112b in the first direction through the third anti-pressure groove H3, and thus does not press or fix one side end or the other side end in the third direction of the one side surface of the second accommodating portion 112b in the first direction toward the other direction of the first direction.

[0261] Therefore, since the first frame 210 does not apply pressure to one side end and the other side end in the third direction of the one side surface of the battery case 110 in the first direction toward the other direction of the first direction, deformation of the edge portion of the battery case 110 on one side or the other side in the third direction caused by the pressure applied by the first frame 210 can be prevented, and such deformation may not be restored even after the pressure stops.

[0262] In addition, even when the edge portion of one side or the other side of the battery case 110 is not pressed and fixed by the first frame 210 and the second frame 220, the edge portion can be covered by the first frame 210. Therefore, the edge portion of one side or the other side of the battery case 110 in the third direction that is not pressed and fixed by the first frame 210 can also be protected by the first frame 210 from external impact, etc., thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0263] [First support member]

[0264] The first support member 214 may be disposed on one side in the second direction of the first anti-stress groove H1 located 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-stress groove H1 located on the other side in the second direction of the first pressure surface S1.

[0265] The first support 214 may be coupled to the first base 212 .

[0266] The first support 214 may face or contact one or the other side surface of the battery cell 100 in the second direction. For example, the first support 214 may face or contact one or the other side surface of the second receiving portion 112b in the second direction.

[0267] Therefore, it is possible to prevent the battery cell 100 from moving in one direction and the other direction of the second direction or prevent the battery cell 100 from being separated from the first frame 210 in one direction and the other direction of the second direction.

[0268] In addition, the first frame 210 can be easily manufactured at low cost with a simple structure, and the first frame 210 fixes the battery cell 100 by applying pressure to the battery housing 110 while not applying pressure and fixing the edge portion of the battery housing 110 on one side or the other side in the second direction, and prevents the battery cell 100 from moving in one direction or the other direction of the second direction or detaching from the first frame 210 in one direction or the other direction of the second direction.

[0269] The first support member 214 may be in contact with one side surface of the second extension portion 114 b in the first direction.

[0270] The first frame 210 may press and fix the second extension portion 114b of the battery cell 100 toward the other direction of the first direction through the first support 214. Here, as described above, the first frame 210 may press and fix the second receiving portion 112b of the battery cell 100 toward the other direction of the first direction through the first pressure surface S1 of the first base 212.

[0271] Therefore, since the first frame 210 presses the second accommodating portion 112b and the second extending portion 114b of the battery cell 100 in the other direction of the first direction, the first frame 210 can stably fix the battery cell 100 when the electrode assembly 120 is accommodated in the battery case 110, and the battery case 110 can maintain a correct shape.

[0272] In addition, the first frame 210 , which may stably fix the battery cell 100 and allow the battery case 110 to maintain a correct shape with the electrode assembly 120 accommodated inside the battery case 110 , may be easily manufactured with a simple structure at low cost.

[0273] Two first support members 214 may be provided. The two first support members 214 may include a first one side support member 214a and a first other side support member 214b ( Figure 5 and Figure 6 ). Here, as described above, the first base 212 may include a pair of first anti-pressure grooves H1.

[0274] The first one side support 214a may be disposed on one side in the second direction of the first anti-stress groove H1 located on one side in the second direction of the first pressure surface S1 among the pair of first anti-stress grooves H1. The first one side support 214a may be coupled to the first base 212 and may face or contact one side surface in the second direction of the battery cell 100 ( Figure 5 and Figure 6 ).

[0275] The first other side support 214b may be disposed on the other side in the second direction of the first anti-pressure groove H1 located on the other side in the second direction of the first pressure surface S1 among the pair of first anti-pressure grooves H1. The first other side support 214b may be coupled to the first base 212 and face or contact the other side surface in the second direction of the battery cell 100 ( Figure 5 and Figure 6 ).

[0276] Therefore, it is possible to prevent the battery cell 100 from moving in one direction and the other direction of the second direction or prevent the battery cell 100 from being separated from the first frame 210 in one direction and the other direction of the second direction.

[0277] In addition, the first frame 210 can be easily manufactured with a simple structure at low cost, and the first frame 210 applies pressure to the battery housing 110 while not applying pressure to and fixing the two edge portions of the battery housing 110 in the second direction to fix the battery cell 100, and prevents the battery cell 100 from moving in one direction and another direction of the second direction or prevents the battery cell 100 from detaching from the first frame 210 in one direction and another direction of the second direction.

[0278] [Second Frame]

[0279] The second frame 220 may be disposed to face the first frame 210 sandwiching the battery cell 100. The second frame 220 may be disposed at the other side of the first frame 210 in the first direction.

[0280] The second frame 220 contacts the other side surface (eg, the lower side surface) of the battery case 110 in the first direction to press and fix the battery cell 100 in one direction (eg, the upward direction) of the first direction.

[0281] Here, the other side surface of the battery case 110 in the first direction may be located on the other side in the first direction of the one side surface of the battery case 110 in the first direction. The same applies hereinafter.

[0282] Here, the pressure may include relative pressure. The same applies below. For example, when the first frame 210 presses the battery cell 100 in another direction of the first direction, even if the second frame 220 is fixed, the second frame 220 presses the battery cell 100 relatively toward one direction of the first direction.

[0283] Here, the second frame 220 does not contact 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 housing 110, so that the second frame 220 can not press or fix 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 housing 110 in one direction of the first direction.

[0284] For example, the second frame 220 may contact the other side surface in the first direction of the first receiving portion 112a of the first housing member 110a of the battery housing 110 constituting the other side surface in the first direction of the battery housing 110, so that the second frame 220 may press and fix the first receiving portion 112a and the battery cell 100 in one direction of the first direction. Here, the second frame 220 may not contact 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 receiving portion 112a, so that the second frame 220 does not press or fix 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 receiving portion 112a in one direction of the first direction ( Figure 5 and Figure 6 ).

[0285] Here, as described above, the first frame 210 may contact a side surface of the battery housing 110 in the first direction to press and fix the battery cell 100 in the other direction of the first direction, while not contacting a side end E1 or another side end E2 of a side surface of the battery housing in the first direction in a second direction intersecting the first direction, thereby not pressing or fixing one side end E1 or another side end E2 in the second direction in the other direction of the first direction.

[0286] Therefore, since the first frame 210 and the second frame 220 press the central portion in the second direction between one side surface in the first direction and the other side surface of the battery case 110 and the other side ends E1 and E3 in the second direction and the other side ends E2 and E4 in the second direction, the battery cell 100 can be stably fixed.

[0287] In addition, since the first frame 210 and the second frame 220 do not apply pressure to one side surface in the first direction and one side end E1 and E3 or the other side end E2 and E4 in the second direction of the other side surface of the battery case 110 toward the other direction and / or one direction of the first direction, deformation of the edge portion of the battery case 110 on one side or the other side in the second direction caused by the pressure applied by the first frame 210 and the second frame 220 can be prevented, and such deformation may not be restored even after the pressure stops.

[0288] Therefore, it is possible to prevent external defects of the battery case 110 caused by pressure applied by the battery cell fixing apparatus 200. As a result, it is possible to reduce a defect rate of the battery cell 100, thereby reducing the manufacturing cost of the battery cell 100.

[0289] In particular, even when one of the first frame 210 and the second frame 220 is fixed and the fixed frame relatively presses the battery cell 100 due to the pressure of the other frame, the fixed first frame 210 or the second frame 220 does not press the edge portion of one side or the other side in the second direction of the battery case 110. Therefore, external defects of the battery case 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented.

[0290] In addition, since the first frame 210 and the second frame 220 do not press one side surface in the first direction and one side end E1 and E3 or the other side end E2 and E4 in the second direction of the other side surface of the battery case 110 toward the other direction and / or one direction of the first direction, external defects of the battery case 110 due to the pressure applied by the battery cell fixing device 200 can be prevented despite the increase in thickness of the battery case 110. Therefore, external defects can be prevented and the durability of the battery case 110 can be improved.

[0291] The following is a detailed description. As described above, in general, when the amount of pressure applied to the battery housing 110 is the same, the degree to which the deformed battery housing 110 recovers to its original shape decreases as the thickness of the battery housing 110 increases. However, according to the present invention, since the first frame 210 and the second frame 220 do not apply pressure to one side surface in the first direction of the battery housing 110 and one side end E1 and E3 or the other side end E2 and E4 in the second direction of the other side surface toward another direction and / or one direction of the first direction, the problem of the edge portion of one side or the other side in the second direction of the battery housing 110 not recovering after being deformed due to the pressure applied by the first frame 210 can be avoided.

[0292] Here, the other end in the second direction of one side end E1 of the side surface in the first direction of the battery housing 110 that does not contact the first frame 210 and the other end in the second direction of one side end E3 of the other side surface in the first direction of the battery housing 110 that does not contact the second frame 220 may intersect at an imaginary straight line L1 extending in the first direction, or one end in the second direction of the other side end E2 of the side surface in the second direction of the battery housing 110 that does not contact the first frame 210 and one end in the second direction of the other side end E4 of the other side surface in the first direction of the battery housing 110 that does not contact the second frame 220 may intersect at an imaginary straight line L2 extending in the first direction ( Figure 5 and Figure 6 ).

[0293] Therefore, the boundaries where the first frame 210 and the second frame 220 press the one side surface and the other side surface of the battery case 110 in the first direction toward the other direction and one direction, respectively, may correspond to each other. Therefore, since the areas where the battery cell fixing device 200 presses the one side surface and the other side surface of the battery case 110 in the first direction correspond to each other, the battery cell fixing device 200 may stably fix the battery cell 100.

[0294] At the same time, the length in the second direction of one side end E3 or the other side end E4 of the other side surface in the first direction of the battery housing 110 that does not contact the second frame 220 is equal to or greater than 1 / 40 of the length in the second direction of the other side surface in the first direction of the battery housing 110 and is equal to or less than 1 / 5 of the length.

[0295] For example, the length in the second direction of one side end E3 or the other side end E4 of the other side surface in the first direction of the first accommodating portion 112a that does not contact the second frame 220 is equal to or greater than 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 is equal to or less than 1 / 5 of the length.

[0296] The second frame 220 may include a second base 222. The second frame 220 may include a second support 224. A description of the second base 222 and the second support 224 is as follows.

[0297] [Second base]

[0298] The second base 222 may be disposed on the other side of the battery cell 100 in the first direction.

[0299] The second base 222 may include a second pressure surface S2 and a second anti-pressure groove H2. The second base 222 may include a fourth anti-pressure groove H4 ( Figure 1 and Figure 3 ).

[0300] The second pressure surface S2 may contact the other side surface in the first direction of the battery case 110. For example, the second pressure surface S2 may contact the other side surface in the first direction of the first accommodation portion 112a.

[0301] The second frame 220 may press and fix the battery cell 100 toward one direction of the first direction through the second pressure surface S2. For example, the second frame 220 may press and fix the first receiving portion 112a of the battery cell 100 toward one direction of the first direction through the second pressure surface S2.

[0302] The second anti-pressure groove H2 may be provided on one side or the other side of the second pressure surface S2 in the second direction and be recessed in the other direction of the first direction.

[0303] The second anti-pressure groove H2 may face 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. For example, the second anti-pressure groove H2 may face 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 in the first direction.

[0304] The second frame 220 may not contact one side end E3 or the other side end E4 in the second direction of the other side surface of the battery housing 110 in the first direction through the second anti-pressure groove H2, and thus does not press or fix one side end E3 or the other side end E4 in the second direction of the other side surface of the battery housing 110 in the first direction toward one direction of the first direction. For example, the second frame 220 may not contact one side end E3 or the other side end E4 in the second direction of the other side surface of the first accommodating portion 112a in the first direction through the second anti-pressure groove H2, and thus does not press or fix one side end E3 or the other side end E4 in the second direction of the other side surface of the first accommodating portion 112a in the first direction toward one direction of the first direction.

[0305] Therefore, the second frame 220 that fixes the battery cell 100 by pressing the battery case 110 without pressing and fixing the edge portion of one or the other side of the battery case 110 in the second direction can be easily manufactured with a simple structure at low cost.

[0306] In addition, by setting the second anti-pressure groove H2 of the second frame 220 to face the edge portion on one side or the other side of the battery case 110 in the second direction, even when the edge portion on one side or the other side of the battery case 110 is not pressed and fixed by the second frame 220, the edge portion can be covered by the second frame 220. Therefore, the edge portion on one side 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 impacts, etc. by the second frame 220, thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0307] At the same time, the second frame 220 may not contact one side end E3 and the other side end E4 in the second direction of the other side surface of the battery housing 110 in the first direction, and thus does not press or fix one side end E3 and the other side end E4 of the other side surface of the battery housing 110 in the first direction in one direction.

[0308] Specifically, the second base 222 may include a pair of second anti-pressure grooves H2. The pair of second anti-pressure grooves H2 may be respectively disposed on one side and the other side in the second direction of the second pressure surface S2, and may be recessed in the other direction of the first direction. The pair of second anti-pressure grooves H2 may respectively face one side end E3 and the other side end E4 in the second direction of the other side surface in the first direction of the battery housing 110 in the first direction.

[0309] Here, the second frame 220 can avoid contacting one side end E3 and the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction through a pair of second anti-pressure grooves H2, thereby not pressing or fixing one side end E3 and the other side end E4 in the second direction of the other side surface of the battery case 110 in the first direction toward one direction of the first direction.

[0310] Therefore, since the second frame 220 does not press one side end E3 and the other side end E4 in the second direction of the other side surface in the first direction of the battery housing 110 toward one direction of the first direction, the deformation of the two edge portions in the second direction of the battery housing 110 caused by the pressure applied by the second frame 220 can be fully prevented, and this deformation may not be restored even after the pressure stops. Therefore, the external defects of the battery housing 110 caused by the pressure applied by the battery cell fixing device 200 can be prevented. As a result, the defect rate of the battery cell 100 can be reduced, thereby reducing the manufacturing cost of the battery cell 100.

[0311] In addition, the second frame 220 that fixes the battery cell 100 by pressing the battery case 110 while not pressing and fixing both edge portions in the second direction of the battery case 110 may be easily manufactured with a simple structure at low cost.

[0312] In addition, since the pair of second anti-pressure grooves H2 of the second frame 220 are arranged to face the two edge portions in the second direction of the battery case 110, even when the two edge portions in the second direction of the battery case 110 are not pressed and fixed by the second frame 220, the two edge portions in the second direction of the battery case 110 can be covered by the second frame 220. Therefore, the two edge portions on one side or the other side in the second direction of the battery case 110 that are not pressed and fixed by the second frame 220 can also be protected by the second frame 220 from external impacts, etc., thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0313] When the other side surface of the battery case 110 in the first direction extends in the third direction, the second pressure surface S2 and the second anti-pressure groove H2 may extend in the third direction along the other side surface of the battery case 110 in the first direction ( Figures 1 to 4 ).

[0314] For example, when the other side surface of the first accommodation portion 112a in the first direction extends in the third direction, the second pressure surface S2 and the second anti-pressure groove H2 may extend in the third direction along the other side surface of the first accommodation portion 112a in the first direction ( Figures 1 to 4 ).

[0315] The fourth anti-pressure groove H4 may be provided on one side or the other side of the second pressure surface S2 in the third direction, and be recessed in the other direction of the first direction.

[0316] The fourth anti-pressure groove H4 may be one side end or the other side end in the third direction of the other side surface in the first direction facing the battery case 110. For example, the fourth anti-pressure groove H4 may be one side end or the other side end in the third direction of the other side surface in the first direction facing the first accommodating portion 112a in the first direction.

[0317] The second frame 220 may not contact one side end or the other side end in the third direction of the other side surface of the battery housing 110 in the first direction through the fourth anti-pressure groove H4, and thus does not press or fix one side end or the other side end in the third direction of the other side surface of the battery housing 110 in the first direction toward one direction of the first direction. For example, the second frame 220 may not contact one side end or the other side end in the third direction of the other side surface of the first accommodating portion 112a in the first direction through the fourth anti-pressure groove H4, and thus does not press or fix one side end or the other side end in the third direction of the other side surface of the first accommodating portion 112a in the first direction toward one direction of the first direction.

[0318] Therefore, since the second frame 220 does not apply pressure to one side end and the other side end in the third direction of the other side surface of the battery case 110 in the first direction in one direction, deformation of the edge portion of one side or the other side in the third direction of the battery case 110 caused by the pressure applied by the second frame 220 can be prevented, and such deformation may not be restored even after the pressure stops.

[0319] In addition, even when the edge portion of one side or the other side of the battery case 110 is not pressed and fixed by the second frame 220, the edge portion can be covered by the second frame 220. Therefore, the edge portion of one side or the other side of the battery case 110 in the third direction that is not pressed and fixed by the second frame 220 can also be protected from external impacts, etc. by the second frame 220, thereby reducing the defect rate of the battery cell 100 and reducing the manufacturing cost of the battery cell 100.

[0320] [Second support member]

[0321] The second support member 224 may be disposed on one side in the second direction of the second anti-pressure groove H2 located on one side in the second direction of the second pressure surface S2, or on the other side in the second direction of the second anti-pressure groove H2 located on the other side in the second direction of the second pressure surface S2.

[0322] The second support member 224 may be coupled to the second base 222 .

[0323] The second support 224 may face or contact one or the other side surface of the battery cell 100 in the second direction. For example, the second support 224 may face or contact one or the other side surface of the first receiving portion 112a in the second direction.

[0324] The second support 224 may be in contact with the other side surface of the first extension portion 114 a in the first direction.

[0325] The second frame 220 may press and fix the first extension portion 114 a of the battery cell 100 toward one direction of the first direction through the second support member 224 .

[0326] The second support piece 224 may also be in contact with the first support piece 214 of the first frame 210 in the first direction.

[0327] Two second support members 224 may be provided. The two second support members 224 may include a second one side support member 224a and a second other side support member 224b ( Figure 5 and Figure 6 ). Here, as described above, the second base 222 may include a pair of second anti-pressure grooves H2.

[0328] The second one side support 224a may be disposed on one side in the second direction of the second anti-stress groove H2 located on one side in the second direction of the second pressure surface S2 of the pair of second anti-stress grooves H2. The second one side support 224a may be coupled to the second base 222 and may face or contact one side surface in the second direction of the battery cell 100 ( Figure 5 and Figure 6 ).

[0329] The second other side support 224b may be disposed on the other side in the second direction of the second anti-pressure groove H2 of the pair of second anti-pressure grooves H2 located on the other side in the second direction of the second pressure surface S2. The second other side support 224b may be coupled to the second base 222 and face or contact the other side surface ( Figure 5 and Figure 6 ).

[0330] Meanwhile, matters regarding the first frame 210 , the first base 212 , and the first support 214 may be inferred and applied to the second frame 220 , the second base 222 , and the second support 224 .

[0331] It should be understood that the described embodiments are illustrative and not restrictive in all aspects, and the scope of the present invention will be indicated by the following claims rather than the specific embodiments described. The meaning and scope of the claims described later and all changes and modifications derived from equivalent concepts should be interpreted as being included within the scope of the present invention.

[0332] Although the present invention has been described with reference to the exemplary drawings, it should be understood that the present invention is not limited to the embodiments and drawings disclosed in this specification, and those skilled in the art will understand that various modifications can be made without departing from the scope and concept of the present invention. In addition, although the operational effects of the structure according to the present invention are not explicitly described when describing the embodiments of the present invention, it should be understood that predictable effects can also be recognized by the structure.

Claims

1. A battery cell fixing device for fixing a battery cell (100), the battery cell comprising a battery housing (110) and an electrode assembly (120) accommodated in the battery housing (110), the battery cell fixing device comprising: The first frame (210) contacts a side surface of the battery housing (110) in the first direction to apply pressure and fix the battery unit (100) in the other direction of the first direction, and does not contact a side end (E1) or another side end (E2) of a side surface of the battery housing in the first direction in a second direction intersecting the first direction, thereby not applying pressure or fixing a side end (E1) or another side end (E2) of a side surface of the battery housing in the first direction in the second direction in the other direction of the first direction.

2. The battery cell fixing device according to claim 1, further comprising: The second frame (220) is arranged to sandwich the battery unit (100) and face the first frame (210), and is in contact with the other side surface of the battery housing (110) in the first direction on the other side of the one side surface in the first direction of the battery housing (110) to press and fix the battery unit (100) in one direction of the first direction, while not contacting the one side end (E3) or the other side end (E4) in the second direction of the other side surface of the battery housing (110) in the first direction, so as not to press or fix the one side end (E3) or the other side end (E4) in the second direction of the other side surface of the battery housing (110) in one direction of the first direction.

3. The battery cell fixing device according to claim 2, wherein: The other end in the second direction of one side end (E1) of the first side surface of the battery housing (110) that does not contact the first frame (210) and the other end in the second direction of one side end (E3) of the second side surface of the battery housing (110) that does not contact the second frame (220) intersect with an imaginary straight line (L1) extending in the first direction, or One end in the second direction of the other side end (E2) of the first direction of the battery housing (110) that does not contact the first frame (210) and one end in the second direction of the other side end (E4) of the first direction of the other side surface of the battery housing (110) that does not contact the second frame (220) intersect at an imaginary straight line (L2) extending in the first direction.

4. The battery cell fixing device according to any one of claims 2 and 3, wherein: The first frame (210) includes a first base (212) disposed on one side of the battery unit (100) in a first direction. The first base (212) comprises: a first pressure surface (S1) in contact with a side surface of the battery housing (110) in a first direction; and a first anti-pressure groove (H1) disposed on one side or the other side of the first pressure surface (S1) in the second direction, the first anti-pressure groove (H1) being recessed in one direction of the first direction and facing one end side (E1) or the other end side (E2) in the second direction of a surface of one side in the first direction of the battery housing (110), The first frame (210) applies pressure to and fixes the battery unit (100) in the other direction of the first direction through the first pressure surface (S1), and does not contact the one side end (E1) or the other side end (E2) in the second direction of the one side surface of the battery housing (110) in the first direction through the first pressure resistance groove (H1), so as not to apply pressure to or fix the one side end (E1) or the other side end (E2) in the second direction of the one side surface of the battery housing (110) in the first direction in the other direction, The second frame (220) includes a second base (222) disposed on the other side of the battery unit (100) in the first direction. The second base (222) comprises: a second pressure surface (S2) in contact with the other side surface of the battery housing (110) in the first direction; and A second anti-pressure groove (H2) is provided on one side or the other side of the second pressure surface (S2) in the second direction, the second anti-pressure groove (H2) is recessed in the other direction of the first direction, and faces one side end (E3) or the other side end (E4) in the second direction of the other side surface of the battery housing (110) in the first direction in the first direction, The second frame (220) applies pressure to and fixes the battery unit (100) in one direction of the first direction via the second pressure surface (S2), and at the same time does not contact one side end (E3) or the other side end (E4) in the second direction of the other side surface of the battery housing (110) in the first direction via the second pressure resistance groove (H2), thereby not applying pressure to or fixing one side end (E3) or the other side end (E4) in the second direction of the other side surface of the battery housing (110) in the first direction.

5. The battery cell fixing device according to claim 4, wherein: The first frame (210) does not contact one side end (E1) and another side end (E2) in the second direction of a side surface of the battery housing (110) in the first direction, and thus does not press or fix one side end (E1) and another side end (E2) of the side surface of the battery housing (110) in the first direction toward the other direction of the first direction, The first base (212) includes a pair of first anti-pressure grooves (H1) respectively arranged on one side and the other side of the first pressure surface (S1) in the second direction, the pair of first anti-pressure grooves (H1) are recessed in one direction of the first direction, and respectively face one side end (E1) and the other side end (E2) in the second direction of one side surface of the battery housing (110) in the first direction, The first frame (210) does not contact one side end (E1) and another side end (E2) in the second direction of one side surface of the battery housing (110) in the first direction through a pair of first anti-pressure grooves (H1), and thus does not press or fix one side end (E1) and another side end (E2) in the second direction of one side surface of the battery housing (110) in the first direction toward the other direction of the first direction. The second frame (220) does not contact one side end (E3) and another side end (E4) in the second direction of the other side surface of the battery housing (110) in the first direction, and thus does not press or fix one side end (E3) and another side end (E4) of the other side surface of the battery housing (110) in the first direction in one direction of the first direction, The second base (222) includes a pair of second anti-pressure grooves (H2) respectively arranged on one side and the other side of the second pressure surface (S2) in the second direction, the pair of second anti-pressure grooves (H2) are recessed in the other direction of the first direction, and face the one side end (E3) and the other side end (E4) in the second direction of the other side surface of the battery housing (110) in the first direction respectively, The second frame (220) does not contact 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 housing (110) through a pair of second anti-pressure grooves (H2), and thus does not press or fix one side end (E3) and the other side end (E4) in the second direction of the other side surface in the first direction of the battery housing (110) in one direction of the first direction.

6. The battery cell fixing device according to any one of claims 1 to 3, wherein: The first frame (210) includes a first base (212) disposed on one side of the battery unit (100) in a first direction. The first base (212) comprises: a first pressure surface (S1) in contact with a side surface of the battery housing (110) in a first direction; and a first anti-pressure groove (H1) disposed on one side or the other side of the first pressure surface (S1) in the second direction, the first anti-pressure groove (H1) being recessed in one direction of the first direction and facing one end side (E1) or the other end side (E2) in the second direction of a surface of one side in the first direction of the battery housing (110), The first frame (210) applies pressure to and fixes the battery unit (100) in the other direction of the first direction via the first pressure surface (S1), and at the same time does not contact the side end (E1) or the other side end (E2) in the second direction of the side surface in the first direction of the battery housing (110) via the first pressure resistance groove (H1), thereby not applying pressure to or fixing the side end (E1) or the other side end (E2) in the second direction of the side surface in the first direction of the battery housing (110).

7. The battery cell fixing device according to claim 6, wherein: A side surface of the battery housing (110) in the first direction extends in a third direction intersecting the first direction and the second direction. The first pressure surface (S1) and the first anti-pressure groove (H1) extend in the third direction along a side surface of the battery housing (110) in the first direction.

8. The battery cell fixing device according to any one of claims 6 and 7, wherein: The first base (212) includes a third anti-pressure groove (H3) arranged on one side or the other side of the first pressure surface (S1) in a third direction intersecting the first direction and the second direction, the third anti-pressure groove (H3) is recessed in one direction of the first direction and faces one side end or the other side end in the third direction of a side surface of the battery housing (110) in the first direction in the first direction, The first frame (210) applies pressure to and fixes the battery unit (100) in the other direction of the first direction via the first pressure surface (S1), and at the same time does not contact one side end or the other side end in the third direction of a side surface of the battery housing (110) in the first direction via the third anti-pressure groove (H3), thereby not applying pressure to or fixing one side end or the other side end in the third direction of a side surface of the battery housing (110) in the first direction in the other direction.

9. The battery cell fixing device according to any one of claims 6 to 8, wherein: The first frame (210) does not contact one side end (E1) and another side end (E2) in the second direction of a side surface of the battery housing (110) in the first direction, and thus does not press or fix one side end (E1) and another side end (E2) of the side surface of the battery housing (110) in the first direction toward the other direction of the first direction, The first base (212) includes a pair of first anti-pressure grooves (H1) respectively arranged on one side and the other side of the first pressure surface (S1) in the second direction, the pair of first anti-pressure grooves (H1) are recessed in one direction of the first direction, and respectively face one side end (E1) and the other side end (E2) in the second direction of one side surface of the battery housing (110) in the first direction, The first frame (210) does not contact one side end (E1) and another side end (E2) in the second direction of a side surface in the first direction of the battery housing (110) through a pair of first anti-pressure grooves (H1), and thus does not press or fix one side end (E1) and another side end (E2) in the second direction of a side surface in the first direction of the battery housing (110) toward the other direction of the first direction.

10. The battery cell fixing device according to claim 9, wherein: The first frame (210) comprises: A first one-side support member (214a) is disposed on one side in the second direction of the first anti-pressure groove (H1) located on one side in the second direction of the first pressure surface (S1) among the pair of first anti-pressure grooves (H1), wherein the first one-side support member (214a) is coupled to the first base (212) and faces or contacts one side surface in the second direction of the battery unit (100); A first other side support member (214b) is arranged on the other side in the second direction of the first anti-pressure groove (H1) located on the other side in the second direction of the first pressure surface (S1) in a pair of first anti-pressure grooves (H1), wherein the first other side support member (214b) is coupled to the first base (212) and faces or contacts the other side surface of the battery cell (100) in the second direction.

11. The battery cell fixing device according to any one of claims 6 to 9, wherein: The first frame (210) includes a first support member (214) coupled to the first base (212) and facing or contacting one side surface or the other side surface of the battery cell (100) in the second direction, wherein the first support member (214) is arranged on one side in the second direction of the first anti-pressure groove (H1) located on one side in the second direction of the first pressure surface (S1), or is arranged on the other side in the second direction of the first anti-pressure groove (H1) located on the other side in the second direction of the first pressure surface (S1).

12. The battery cell fixing device according to claim 11, wherein: The battery housing (110) comprises a first housing component (110a) extending in a second direction and a third direction intersecting the first direction and the second direction, and a second housing component (110b) disposed on one side of the first housing component (110a) in the first direction and covering the first housing component (110a). The electrode assembly (120) is accommodated between a first housing component (110a) and a second housing component (110b). The first housing component (110a) includes a first receiving portion (112a) and a first extending portion (114a). The second housing component (110b) includes a second accommodating portion (112b) and a second extending portion (114b). The first receiving portion (112a) and the second receiving portion (112b) face or contact each other to provide an accommodation space (AS) for accommodating the electrode assembly (120). The first extension portion (114a) and the second extension portion (114b) extend outward from the first receiving portion (112a) and the second receiving portion (112b) respectively in at least one direction or the other direction of the second direction, the first extension portion (114a) and the second extension portion (114b) at least partially surround the first receiving portion (112a) and the second receiving portion (112b) respectively and can be bonded to each other, The second receiving portion (112b) protrudes more than the second extending portion (114b) in one direction of the first direction, The first pressure surface (S1) contacts a side surface of the second accommodation portion (112b) in a first direction, The first anti-pressure groove (H1) faces one side end (E1) or the other side end (E2) in the second direction of a surface of one side in the first direction of the second accommodation portion (112b), The first frame (210) applies pressure to and fixes the second receiving portion (112b) of the battery unit (100) in the other direction of the first direction through the first pressure surface (S1), and at the same time, the first anti-pressure groove (H1) does not contact the one side end (E1) or the other side end (E2) in the second direction of the one side surface of the second receiving portion (112b) in the first direction, thereby not applying pressure to or fixing the one side end (E1) or the other side end (E2) in the second direction of the one side surface of the second receiving portion (112b) in the first direction in the other direction, The first support member (214) faces or contacts one side surface or the other side surface of the second accommodation portion (112b) in the second direction, and contacts one side surface of the second extension portion (114b) in the first direction. The first frame (210) presses and fixes the second extension portion (114b) of the battery unit (100) toward another direction of the first direction through the first support member (214).

13. The battery cell fixing device according to any one of claims 1 to 11, in, The battery housing (110) comprises a first housing component (110a) extending in a second direction and a third direction intersecting the first direction and the second direction, and a second housing component (110b) disposed on one side of the first housing component (110a) in the first direction and covering the first housing component (110a). The electrode assembly (120) is accommodated between a first housing component (110a) and a second housing component (110b). The first housing component (110a) and the second housing component (110b) respectively include a first receiving portion (112a) and a second receiving portion (112b), wherein the first receiving portion (112a) and the second receiving portion (112b) face or contact each other to provide a receiving space (AS) for receiving the electrode assembly (120). The width (W1) of the accommodation space (AS) in the second direction is greater than the width (W2) of the electrode assembly (120) in the second direction, so that at least a portion of one side end (E1) or the other side end (E2) in the second direction of a surface of one side of the second accommodation portion (112b) in the first direction is not supported by the electrode assembly (120) in the first direction, The first frame (210) contacts a side surface of the second accommodating portion (112b) in the first direction to apply pressure and fix the battery unit (100) in the other direction of the first direction, while not contacting a side end (E1) or the other side end (E2) in the second direction of a side surface of the battery housing in the first direction, thereby not applying pressure or fixing a side end (E1) or the other side end (E2) in the second direction in the other direction of the first direction.

14. The battery cell fixing device according to any one of claims 1 to 14, wherein: The second housing component (110b) is folded relative to the first housing component (110a) to face and cover the first housing component (110a) in a first direction, wherein one end or the other end of the second housing component (110b) is connected to one end or the other end of the first housing component (110a) in a second direction, and other parts of the second housing component (110b) except one end or the other end of the second housing component (110b) can be separated from the first housing component (110a), The second receiving portion (112b) has a concave shape defining a predetermined space (PS2), the predetermined space (PS2) constituting at least a portion of a receiving space (AS) receiving at least a portion of the electrode assembly (120), In order to prevent interference between the second accommodating portion (112b) and the electrode assembly (120) when the second shell part (110b) is folded relative to the first shell part (110a) when the electrode assembly (120) is arranged in the first accommodating portion (112a), the width (W1') of the predetermined space (PS2) in the accommodating space (AS) in the second direction is greater than the width (W2) of the electrode assembly (120) in the second direction, so that at least a part of one side end (E1) or the other side end (E2) in the second direction of a side surface of the second accommodating portion (112b) in the first direction is not supported by the electrode assembly (120) in the first direction.

15. The battery cell fixing device according to any one of claims 1 to 14, wherein: The length in the second direction of one side end (E1) or the other side end (E2) of the side surface in the first direction of the battery housing (110) that is not in contact with the first frame (210) is equal to or greater than 1 / 40 of the length in the second direction of the side surface in the first direction of the battery housing (110), and is equal to or less than 1 / 5 of the length in the second direction of the side surface in the first direction of the battery housing (110).

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