Battery module and method of manufacturing battery module

Abstract

The present invention provides a battery module comprising: a case (100) having a hollow space (S) therein; a plurality of bus bars (200) attached to one end portion and the other end portion of the hollow space (S) in the first direction; a plurality of battery cells (300) which are arranged in the hollow space (S), are arranged side by side in a second direction intersecting the first direction and the vertical direction, and are in contact with the bus bar (200); and one or more barrier walls (400) extending in a first direction and a vertical direction, mounted between a pair of battery cells (300) arranged adjacent to each other in a second direction to partition a hollow space (S) in the second direction, and extending to one end or the other end of the case (100) in the first direction, the hollow space (S) is spaced apart in the second direction from one end portion or the other end portion in the first direction of the hollow space (S). The bus bars (200) respectively mounted on one side and the other side of the barrier wall (400) in the second direction with the barrier wall (400) interposed therebetween are physically separated in the second direction by the barrier wall (400).

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0072093 filed on June 14, 2022, and all contents disclosed in the document of this patent application are included as part of this specification.

[0002] The present invention relates to a battery module and a method of manufacturing the battery module, and more particularly, to a battery module and a method of manufacturing the battery module that delay or prevent heat transfer between battery cells and reduce manufacturing costs. Background Art

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

[0004] A battery module is a device in which multiple secondary batteries (hereinafter referred to as "battery cells") are connected in series or in parallel. When some of the battery cells in a battery module have problems such as short circuits and the temperature of the battery cells exceeds a critical temperature, thermal runaway may occur.

[0005] The heat and flames generated by the thermal runaway phenomenon of some battery cells in the battery module will increase the temperature of other battery cells, which may cause the thermal runaway phenomenon to spread to other battery cells. When the thermal runaway phenomenon spreads rapidly to other battery cells, the possibility of fire or explosion of the battery module increases. Therefore, it is necessary to delay the heat transfer between battery cells. In this regard, reference will be made to Figure 1 Give a description.

[0006] Figure 1 is a plan view showing a conventional battery module.

[0007] Reference Figure 1 , a conventional battery module 1 may include a case 2, a bus bar 3, and a battery cell 4. A plurality of battery cells 4 may be electrically connected to the bus bar 3.

[0008] For example, when a thermal runaway phenomenon occurs in the battery cell 4 shown at the upper end (one end in the second direction) of the drawing, heat, flame, etc. may be transferred / propagated, thereby propagating the thermal runaway phenomenon to the battery cell 4 adjacent to the battery cell 4 shown at the upper end of the drawing. In addition, for example, heat, flame, etc. may be transferred / propagated through the bus bar 3 or the space in which the bus bar 3 is installed, as shown by the dotted arrow A, so that the thermal runaway phenomenon is propagated even to the battery cell that is not adjacent to the battery cell 4 shown at the upper end of the drawing.

[0009] Here, when Figure 1 When multiple battery cells 4 are connected in series, the thermal runaway phenomenon can spread more quickly to non-adjacent battery cells 300, and the possibility of fire or explosion of the battery module increases. In the case where multiple battery cells 4 are connected in series, a pair of battery cells 4 that are not adjacent to each other have a larger potential difference than a pair of adjacent battery cells 4, so that the possibility of a short circuit problem in the battery cell 4 increases because the thermal runaway phenomenon spreads more quickly to non-adjacent battery cells 300 having a larger potential difference.

[0010] Therefore, in order to reduce the possibility of fire or explosion of the battery module, heat transfer must be delayed not only between adjacent battery cells 4 but also between non-adjacent battery cells 4. The prior art related to delaying heat transfer between battery cells is as follows.

[0011] Korean Patent Application Publication No. 10-2022-0014117 discloses a battery module including a heat-absorbing firewall capable of controlling a heat transfer phenomenon caused by a battery fire, wherein the heat-absorbing firewall is interposed between a plurality of secondary battery cells accommodated in the battery module.

[0012] However, the prior art does not provide a method for delaying heat transfer between non-adjacent battery cells 4 . Summary of the invention

[0013] Technical issues

[0014] In order to solve the above problems, an object of the present invention is to provide a battery module in which heat transfer between battery cells is delayed or prevented.

[0015] An object of the present invention is to provide a battery module capable of reducing the possibility of fire or explosion of the battery module 10 .

[0016] An object of the present invention is to provide a battery module that delays or prevents heat transfer between battery cells while electrically connecting battery cells to one another.

[0017] An object of the present invention is to provide a battery module that is lightweight, reduces manufacturing and maintenance costs, and shortens manufacturing time.

[0018] 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 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 achieved by the methods described in the attached claims and combinations thereof.

[0019] Technical Solution

[0020] In order to solve the above problems, the present invention provides a battery module including a case 100 , a plurality of bus bars 200 , a plurality of battery cells 300 , and one or more barriers 400 .

[0021] The housing 100 may be provided with a hollow space S therein.

[0022] A plurality of bus bars 200 may be installed at one end and the other end of the hollow space S in the first direction.

[0023] A plurality of battery cells 300 are arranged side by side in the hollow space S and in a second direction intersecting the first direction and the up-down direction.

[0024] Each of the plurality of battery cells 300 may include a body 310 and a pair of electrodes 320 and 330 .

[0025] The body 310 may be disposed at a central portion of the hollow space S in the first direction.

[0026] A pair of electrodes 320 and 330 may protrude from one side and the other side of the body 310 toward the first direction.

[0027] A pair of electrodes 320 and 330 may be in contact with the bus bar 200 .

[0028] One or more barriers 400 may extend along the first direction and the up-down direction.

[0029] One or more barriers 400 may be installed between the bodies 310 of a pair of battery cells 300 arranged adjacent to each other in the second direction to partition the central portion of the hollow space S in the first direction in the second direction.

[0030] One or more barriers 400 may extend in the first direction to the one end or the other end of the housing 100 in the first direction to partition the one end or the other end of the hollow space S in the first direction in the second direction.

[0031] A pair of bus bars among the plurality of bus bars 200 installed on one side and the other side of each of the one or more barriers 400 in the second direction may be physically separated by the one or more barriers 400 in the second direction, and each of the one or more barriers 400 may be located between the pair of bus bars.

[0032] In one embodiment, the housing 100 may include a base 110 and a first sidewall 120 or a second sidewall 130 .

[0033] The base 110 may extend in the first direction and the second direction.

[0034] The first side wall 120 may extend in an upward direction from one end portion of the base 110 in the first direction.

[0035] The second side wall 130 may extend in the upward direction from the other end portion of the base 110 in the first direction.

[0036] Each of the one or more barriers 400 may extend to the one side or the other side in the first direction to contact the first side wall 120 or the second side wall 130 and, accordingly, separate the one end or the other end in the first direction of the hollow space S in the second direction.

[0037] In one embodiment, the one or more barriers 400 may include a first barrier 400a or a second barrier 400b.

[0038] The first barrier 400 a may extend to one side in the first direction and contact the first sidewall 120 , thereby partitioning one end portion of the hollow space S in the first direction in the second direction.

[0039] The first barrier 400 a may be at least partially separated from the second sidewall 130 .

[0040] The second barrier 400 b may extend to the other side of the first direction and contact the second sidewall 130 , thereby partitioning the other end of the hollow space S in the first direction in the second direction.

[0041] The second barrier 400 b may be at least partially separated from the first sidewall 120 .

[0042] The plurality of bus bars 200 may include a one-side bus bar 200 a and another-side bus bar 200 b .

[0043] The one-side bus bar 200a and the other-side bus bar 200b may be respectively installed on one side of the first barrier 400a in the first direction, on one side and on the other side adjacent to the first barrier 400a in the second direction, wherein the first barrier 400a is located between the one-side bus bar 200a and the other-side bus bar 200b, and the one-side bus bar 200a and the other-side bus bar 200b are physically separated from each other; or may be respectively installed on one side of the second barrier 400b in the first direction, on one side and on the other side adjacent to the second barrier 400b in the second direction, wherein the second barrier 400b is located between the one-side bus bar 200a and the other-side bus bar 200b, and the one-side bus bar 200a and the other-side bus bar 200b are physically separated from each other.

[0044] The plurality of battery cells 300 may include a one-side battery cell 300 a and another-side battery cell 300 b .

[0045] The one-side battery cells 300a and the other-side battery cells 300b may be respectively arranged on one side and the other side of the first barrier 400a in the second direction adjacent to the first barrier 400a; or respectively arranged on one side and the other side of the second barrier 400b in the second direction adjacent to the second barrier 400b.

[0046] The pair of electrodes 320 and 330 of the one-side battery cell 300a may contact the one-side bus bar 200a; and contact one of the plurality of bus bars 200 installed between the first barrier 400a and the second side wall 130 or between the second barrier 400b and the first side wall 120.

[0047] The pair of electrodes 320 and 330 of the other side battery cell 300b may contact the other side bus bar 200b; and contact one of the plurality of bus bars 200 installed between the first barrier 400a and the second side wall 130 or between the second barrier 400b and the first side wall 120.

[0048] Therefore, the battery cells 300 a on one side and the battery cells 300 b on the other side may be connected in series.

[0049] In one embodiment, a plurality of barriers 400 may be provided.

[0050] The plurality of barriers 400 may include one or more first barriers 400 a and one or more second barriers 400 b .

[0051] The one or more first barriers 400 a may extend to one end portion of the housing 100 in the first direction to partition the one end portion of the hollow space S in the first direction in the second direction.

[0052] The one or more second barriers 400 b may extend to the other end portion of the housing 100 in the first direction to partition the other end portion of the hollow space S in the first direction in the second direction.

[0053] The one or more first barriers 400 a and the one or more second barriers 400 b may be alternately arranged along the second direction.

[0054] The bus bars 200 installed on each of one side in the first direction, one side in the second direction, and the other side of the one or more first barriers 400 a between the bus bars 200 may be physically separated from each other.

[0055] The bus bars 200 installed on each of one side and the other side of the one or more second barriers 400 b in the first direction between the bus bars 200 may be physically separated from each other.

[0056] In one embodiment, a plurality of barriers 400 may be provided.

[0057] The plurality of barriers 400 may include one or more first barriers 400 a and one or more second barriers 400 b .

[0058] The one or more first barriers 400 a may extend to the one end portion of the housing 100 in the first direction to partition the one end portion of the hollow space S in the first direction in the second direction.

[0059] The one or more second barriers 400 b may extend to the other end portion of the housing 100 in the first direction to partition the other end portion of the hollow space S in the first direction in the second direction.

[0060] The one or more first barriers 400 a may not partition the other end portion of the hollow space S in the first direction in the second direction.

[0061] The one or more second barriers 400 b may not partition the one end portion of the hollow space S in the first direction in the second direction.

[0062] One or more first barriers 400 a and one or more second barriers 400 b are alternately arranged along the second direction.

[0063] In one embodiment, at least a portion of the plurality of bus bars 200 may be installed on the other side of the one or more first barriers 400 a in the first direction, or installed on one side of the one or more second barriers 400 b in the first direction.

[0064] In one embodiment, the housing 100 may include a cover 160 covering an upper portion of the hollow space S. As shown in FIG.

[0065] The cover 160 may be provided with one or more exhaust holes 162 .

[0066] The one or more vent holes 162 may penetrate the cover 160 .

[0067] The one or more exhaust holes 162 may exhaust flame, heat, or gas generated from the battery cells 300 installed in the hollow space S to the outside of the case 100 .

[0068] In one embodiment, a plurality of barriers 400 may be provided.

[0069] The plurality of barriers 400 may include one or more first barriers 400 a and one or more second barriers 400 b .

[0070] The one or more first barriers 400 a may extend to the one end portion of the housing 100 in the first direction to partition the one end portion of the hollow space S in the first direction in the second direction.

[0071] The one or more second barriers 400 b may extend to the other end portion of the housing 100 in the first direction to partition the other end portion of the hollow space S in the first direction in the second direction.

[0072] The one or more first barriers 400 a may not partition the other end portion of the hollow space S in the first direction in the second direction.

[0073] The one or more second barriers 400 b may not partition the one end portion of the hollow space S in the first direction in the second direction.

[0074] The one or more first barriers 400 a and the one or more second barriers 400 b are alternately arranged along the second direction.

[0075] The one or more exhaust holes 162 are provided at an upper portion of the other side of the one or more first barriers 400 a in the first direction or an upper portion of one side of the one or more second barriers 400 b in the first direction.

[0076] In addition, in order to solve the above problem, the present invention provides a method for manufacturing a battery module S500, including a shell manufacturing step S510 for manufacturing the shell 100.

[0077] In the case manufacturing step S510 , at least a portion of the case 100 and at least a portion of the one or more barriers 400 may be integrally extruded.

[0078] In one embodiment, the housing 100 may include a base 110 , a third sidewall 140 , and a fourth sidewall 150 .

[0079] The base 110 may extend in a first direction and a second direction.

[0080] The third side wall 140 may extend in an upward direction from one end portion of the base 110 in the second direction.

[0081] The fourth side wall 150 may extend from the other end portion of the base portion 110 in the second direction in the upward direction.

[0082] At least a portion of the one or more barriers 400 may be coupled to at least a portion of an upper surface of the base 110 .

[0083] In the case manufacturing step S510 , at least a portion of the base 110 , at least a portion of the third sidewall 140 , at least a portion of the fourth sidewall 150 , and at least a portion of the one or more barriers 400 may be integrally extruded.

[0084] Beneficial Effects

[0085] According to an embodiment of the present invention, a battery module 10 may include: a shell 100 having a hollow space S therein; a plurality of bus bars 200 installed at one end and the other end in a first direction of the hollow space S; a plurality of battery cells 300 arranged in the hollow space S along a second direction intersecting the first direction and the up-down direction, wherein each of the plurality of battery cells 300 includes: a main body 310 arranged at a central portion in the first direction of the hollow space S; and a pair of electrodes 320 and 330, the pair of electrodes contacting the plurality of bus bars 200 and extending from the main body 310. The housing 100 includes a main body 310 protruding toward one side and the other side in the first direction; and one or more barriers 400 extending in the first direction and the up-down direction, wherein each of the one or more barriers 400 is disposed between the main bodies 310 of a pair of battery cells 300 adjacent to each other in the second direction to partition a central portion of the hollow space S in the first direction in the second direction; and extends to one end or the other end of the housing 100 in the first direction to partition the one end or the other end of the hollow space S in the first direction in the second direction. Therefore, heat transfer between the central portion in the first direction inside the housing 100 and the battery cells 300 at one end or the other end of the housing 100 can be delayed or prevented.

[0086] Therefore, even when a problem such as a short circuit occurs in some battery cells 300 causing a thermal runaway phenomenon, the thermal runaway phenomenon is prevented from rapidly spreading to other battery cells 300 , thereby reducing the possibility of fire or explosion of the battery module 10 .

[0087] In particular, one end or the other end in the first direction inside the case 100 where heat transfer between the battery cells 300 inevitably occurs due to the bus bar 200 connecting the plurality of battery cells 300 is partitioned by the barrier 400. Therefore, heat transfer between the battery cells 300 can be effectively delayed or prevented.

[0088] In addition, since they are separated by the barrier 400, rapid heat transfer between non-adjacent battery cells 300 in the second direction having a large potential difference between them that occurs at one end or the other end in the first direction inside the housing 100 can be prevented. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced.

[0089] According to an embodiment of the present invention, the housing 100 may include: a base 110 extending in a first direction and a second direction; and a first side wall 120 extending in an upward direction from one end in the first direction of the base 110 or a second side wall 130 extending in an upward direction from the other end in the first direction of the base 110. Each of the one or more barriers 400 may extend to one side or the other side in the first direction to contact the first side wall 120 or the second side wall 130, and accordingly partition one end or the other end in the first direction of the hollow space S in the second direction.

[0090] Therefore, the housing 100 and the barrier 400 can be easily constructed with a simple structure and at low cost.

[0091] According to an embodiment of the present invention, the one or more barriers 400 may include: a first barrier 400a extending toward one side in the first direction to contact the first sidewall 120, separating one end of the hollow space S in the first direction in the second direction, and at least partially separating from the second sidewall 130; or a second barrier 400b extending toward the other side in the first direction to contact the second sidewall 130, separating the other end of the hollow space S in the first direction in the second direction, and at least partially separating from the first sidewall 120. The plurality of bus bars 200 may include a one side bus bar 200a and an other side bus bar 200b. The one-side bus bar 200a and the other-side bus bar 200b may be installed on the first side and the second side of the first barrier 400a in the second direction, respectively, wherein the first barrier 400a is located between the one side and the other side, and the one side and the other side are physically separated from each other; or installed on the first side and the second side of the second barrier 400b in the second direction, respectively, wherein the second barrier 400b is located between the one side and the other side, and the one side and the other side are physically separated from each other. The plurality of battery cells 300 may include a one-side battery cell 300a and a other-side battery cell 300b. The one-side battery cell 300a and the other-side battery cell 300b are respectively disposed on the one side and the other side of the first barrier 400a in the second direction, respectively, or disposed on the one side and the other side of the second barrier 400b in the second direction, respectively, adjacent to the first barrier 400; or disposed on the one side and the other side of the second barrier 400b in the second direction, respectively. A pair of electrodes 320 and 330 of the battery cell 300a on one side may contact the bus bar 200a on one side, and contact one of the plurality of bus bars 200 installed between the first barrier 400a and the second side wall 130 or between the second barrier 400b and the first side wall 120. A pair of electrodes 320 and 330 of the battery cell 300b on the other side may contact the bus bar 200b on the other side, and contact one of the plurality of bus bars 200 installed between the first barrier 400a and the second side wall 130 or between the second barrier 400b and the first side wall 120. Therefore, the battery cell 300a on one side and the battery cell 300b on the other side may be connected in series.

[0092] Therefore, since the one side bus bar 200a and the other side bus bar 200b are physically separated from each other in such a manner that the first barrier 400a or the second barrier 400b is located therebetween, one end or the other end in the first direction inside the housing 100 is clearly separated by the first barrier 400a or the second barrier 400b. Therefore, heat transfer between the battery cells 300 can be effectively delayed or prevented.

[0093] In addition, even when the electrodes 330 or 320 on one side in the first direction of the one-side battery cell 300a and the other-side battery cell 300b are not connected to each other due to the physical separation between the one-side bus bar 200a and the other-side bus bar 200b, the electrodes 330 or 320 on the other side in the first direction of the one-side battery cell 300a and the other-side battery cell 300b can be electrically connected to each other (in series). That is, while the one-side battery cell 300a is electrically connected to the other-side battery cell 300b, one end or the other end in the first direction inside the housing 100 is clearly separated by the first barrier 400a or the second barrier 400b.

[0094] According to an embodiment of the present invention, a plurality of barriers 400 may be provided. The plurality of barriers 400 may include: one or more first barriers 400a extending to one end of the housing 100 in the first direction to separate one end of the hollow space S in the first direction in the second direction; and one or more second barriers 400b extending to the other end of the housing 100 in the first direction to separate the other end of the hollow space S in the first direction in the second direction. One or more first barriers 400a and one or more second barriers 400b are alternately arranged along the second direction. The busbars 200 installed on each of one side in the first direction, one side in the second direction, and the other side of one or more first barriers 400a may be physically separated from each other, with one or more first barriers 400a located therebetween. The busbars 200 installed on each of one side in the second direction, one side in the second direction, and the other side of the other side of one or more second barriers 400b in the first direction may be physically separated from each other, with one or more second barriers 400b located therebetween.

[0095] Therefore, since the bus bars 200 are physically separated from each other in such a manner that the first barrier 400a and the second barrier 400b are located therebetween, one end and the other end in the first direction inside the housing 100 are clearly separated by the first barrier 400a and the second barrier 400b. Therefore, heat transfer between the battery cells 300 can be effectively delayed or prevented.

[0096] In addition, even when one electrode at one side in the first direction of the battery cell 300 disposed on one side and the other side in the second direction of the first barrier 400a and the second barrier 400b is not connected to each other due to the physical separation between the bus bar 200 between which the first barrier 400a and the second barrier 400b are located, the electrode located on the other side may be electrically connected to each other (in series) by the bus bar 200c installed on the other side in the first direction of the first barrier 400a or by the bus bar 200c installed on one side in the first direction of the second barrier 400b. That is, while the battery cell 300 is electrically connected, one end and the other end in the first direction inside the housing 100 are clearly separated by the first barrier 400a and the second barrier 400b.

[0097] According to an embodiment of the present invention, a plurality of barriers 400 may be provided. The plurality of barriers 400 may include: one or more first barriers 400a extending to one end of the housing 100 in the first direction to separate one end of the hollow space S in the first direction in the second direction; and one or more second barriers 400b extending to the other end of the housing 100 in the first direction to separate the other end of the hollow space S in the first direction in the second direction. The one or more first barriers 400a may not separate the other end of the hollow space S in the first direction in the second direction. The one or more second barriers 400b do not separate one end of the hollow space S in the first direction in the second direction. The one or more first barriers 400a and the one or more second barriers 400b are alternately arranged along the second direction.

[0098] Therefore, the flame, heat or gas generated from the battery cell 300 can be transferred / propagated / diffused in the second direction through one end or the other end of the housing 100 in the first direction that is not separated by the first barrier 400a and the second barrier 400b. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced.

[0099] Furthermore, since flame, heat, or gas generated from a battery cell 300 can reach another battery cell 300 only by repeatedly moving back and forth in the first direction between both ends of the housing 100, it is possible to delay the transfer of flame, heat, or gas between the battery cells 300. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced.

[0100] Furthermore, since flame or heat generated from the battery cells 300 sequentially propagates in the second direction toward adjacent battery cells 300 having a smaller potential difference, the possibility of fire or explosion of the battery module 10 is reduced, and even if fire or explosion occurs, damage can be reduced.

[0101] Furthermore, since the lengths of the first and second barriers 400 a and 400 b in the first direction are reduced, the battery module 10 may be lightweight.

[0102] In addition, a hollow space can be provided in which the bus bar 200 can be installed on the other side of the first barrier 400a in the first direction and on one side of the first direction of the second barrier 400b. Therefore, in order to perform insertion installation or penetration installation of the bus bar 200 on the other side of the first barrier 400a in the first direction and on one side of the first barrier 400b in the first direction, it is not necessary to process the first barrier 400a and the second barrier 400b. Therefore, the manufacturing cost of the battery module 10 can be reduced, and the manufacturing time can be shortened.

[0103] According to an embodiment of the present invention, at least a portion of the plurality of bus bars 200 may be installed on the other side of the first direction of the first barrier 400 a or on one side of the first direction of the second barrier 400 b .

[0104] Therefore, since the bus bar 200 can be easily installed and replaced, the manufacturing and maintenance costs of the battery module 10 can be reduced.

[0105] According to an embodiment of the present invention, the case 100 may include a cover 160 covering an upper portion of the hollow space S. The cover 160 is provided with one or more exhaust holes 162 penetrating the cover 160 for exhausting flame, heat or gas generated from the battery cell 300 installed in the hollow space S to the outside of the case 100.

[0106] Therefore, heat can be prevented from accumulating or concentrating inside the housing 100, the amount of transferred heat can be reduced, and heat transfer can be delayed. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced.

[0107] According to an embodiment of the present invention, a plurality of barriers 400 may be provided. The plurality of barriers 400 may include: one or more first barriers 400a extending to one end of the housing 100 in the first direction to separate one end of the hollow space S in the first direction in the second direction; and one or more second barriers 400b extending to the other end of the housing 100 in the first direction to separate the other end of the hollow space S in the first direction in the second direction. The one or more first barriers 400a may not separate the other end of the hollow space S in the first direction in the second direction. The one or more second barriers 400b may not separate one end of the hollow space S in the first direction in the second direction. The one or more first barriers 400a and the one or more second barriers 400b may be alternately arranged along the second direction. The one or more exhaust holes 162 are provided at the upper portion of the other side of the first direction of the one or more first barriers 400a or the upper portion of the one side of the first direction of the one or more second barriers 400b.

[0108] Therefore, since the exhaust holes 162 are provided in the region where the transfer (propagation) direction of the flame, heat or gas changes rapidly, even if the number or size of the exhaust holes 162 is small, the accumulation or concentration of the flame, heat or gas is prevented, and the flame, heat or gas can be effectively discharged to the outside of the housing 100. Therefore, the possibility of the battery module 10 catching fire or exploding can be reduced.

[0109] According to an embodiment of the present invention, the method of manufacturing a battery module may include a case manufacturing step S510 of manufacturing the case 100. In the case manufacturing step S510, at least a portion of the case 100 and at least a portion of the one or more barriers 400 may be integrally extruded.

[0110] Therefore, the manufacturing cost of the battery module 10 can be reduced, and the manufacturing time can be shortened.

[0111] According to an embodiment of the present invention, the housing 100 may include: a base 110 extending in the first direction and the second direction; a third side wall 140 extending in an upward direction from one end of the base 110 in the second direction; and a fourth side wall 150 extending in an upward direction from the other end of the base 110. At least a portion of the one or more barriers 400 may be coupled to at least a portion of the upper surface of the base 110. At least a portion of the base 110, at least a portion of the third side wall 140, at least a portion of the fourth side wall 150, and at least a portion of the one or more barriers 400 may be integrally extruded in the housing manufacturing step S510.

[0112] Therefore, the manufacturing cost of the battery module 10 can be reduced, and the manufacturing time can be shortened.

[0113] In addition to the above-mentioned effects, specific effects of the present invention will be described and detailed instructions for implementing the present invention will be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0114] Figure 1 is a plan view showing a conventional battery module.

[0115] Figure 2 is an exploded perspective view schematically showing a battery module according to an embodiment of the present invention.

[0116] Figure 3 The cover is removed Figure 2 A plan view of a battery module.

[0117] Figure 4 It is shown Figure 3 An image of a battery cell removed from the battery pack.

[0118] Figure 5 yes Figure 2 A top view of the battery module.

[0119] Figure 6 yes Figure 2 Side cross-sectional view of portion C.

[0120] Figure 7 is a flowchart of a method of manufacturing a battery module according to an embodiment of the present invention.

[0121] [Explanation of Reference Numerals]

[0122] 10: Battery module

[0123] 100: Shell

[0124] 110: base 120: first side wall

[0125] 130: second side wall 140: third side wall

[0126] 150: fourth side wall 160: cover

[0127] 162: Exhaust hole

[0128] 200: Busbar

[0129] 300: Battery cell 310: Main body

[0130] 320, 330: Electrode

[0131] 400: Barrier DETAILED DESCRIPTION

[0132] The above-mentioned objects, features and advantages will be described in detail 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 concept 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. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used to represent the same or similar components.

[0133] Although "first", "second", etc. may be used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another component, and unless otherwise specified, the first component may of course be the second component.

[0134] Throughout the specification, unless otherwise specified, each component may be in the singular or in the plural.

[0135] Hereinafter, arranging any component on the "upper (or lower)" or "on (or below)" of a component means that the arbitrary component is placed in contact with the upper (or lower) surface of the component. In addition, this may mean that other components may be interposed between the component and any component disposed on (or below) the component.

[0136] In addition, when a component is described as being “linked,” “coupled,” or “connected” to another component, the components may be directly connected or connected to each other, but other components may be “interposed” between each component, or each component may be “linked,” “coupled,” or “connected” through other components.

[0137] Unless the context clearly indicates otherwise, singular expressions used herein may include plural expressions. In the present application, terms such as "consisting of" or "comprising" should not be interpreted as necessarily including all the various components or steps described in the specification. It should be interpreted that some components or some steps may not be included, and additional components or steps may be further included.

[0138] Figure 2 is an exploded perspective view schematically showing a battery module according to an embodiment of the present invention. Figure 3 The cover is removed Figure 2 A plan view of a battery module. Figure 4 It is shown Figure 3 An image of a battery cell removed from the battery pack. Figure 5 yes Figure 2 A top view of the battery module. Figure 6 yes Figure 2 Side cross-sectional view of portion C. Figure 7 is a flowchart of a method of manufacturing a battery module according to an embodiment of the present invention.

[0139] [Battery module]

[0140] Reference Figures 2 to 6 , a battery module 10 according to one embodiment may include a case 100, a plurality of bus bars 200, a plurality of battery cells 300, and one or more barriers 400. Each element will be described below.

[0141] [case]

[0142] The housing 100 may be provided with a hollow space S therein.

[0143] The housing 100 may include a base 110 and a first side wall 120 or a second side wall 130. In addition, the housing 100 may include a third side wall 140 and a fourth side wall 150. Furthermore, the housing 100 may include a cover 160.

[0144] The base 110 may extend in a first direction (eg, left and right directions) and a second direction (eg, front and rear directions). The base 110 may have a plate shape.

[0145] The first side wall 120 may extend in an upward direction from one end portion (left side end portion) in the first direction of the base 110. The first side wall 120 may have a plate shape.

[0146] The second side wall 130 may extend in an upward direction from the other end portion (right side end portion) in the first direction of the base 110. The second side wall 130 may have a plate shape.

[0147] The third sidewall 140 may extend in an upward direction from one end portion in the second direction of the base 110. The third sidewall 140 may have a plate shape.

[0148] The fourth side wall 150 may extend in an upward direction from the other end portion in the second direction of the base 110. The fourth side wall 150 may have a plate shape.

[0149] The cover 160 may cover an upper portion of the hollow space S of the housing 100 .

[0150] One or more exhaust holes 162 may be provided at the cover 160 .

[0151] One or more exhaust holes 162 may penetrate the cover 160. The one or more exhaust holes 162 may exhaust flame, heat, or gas generated from the battery cells 300 installed in the hollow space S to the outside of the case 100.

[0152] Therefore, heat can be prevented from accumulating or concentrating inside the housing 100, the amount of transferred heat can be reduced, and heat transfer can be delayed. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced.

[0153] [Bus Bar]

[0154] A plurality of bus bars 200 may be provided. The plurality of bus bars 200 may be installed at one end and the other end of the hollow space S of the case 100 in the first direction.

[0155] The bus bar may be provided with holes through which the electrodes 320 and 330 of the battery cells 300 pass.

[0156] The plurality of bus bars 200 may include a side bus bar 200a and a side bus bar 200b ( Figure 3 ). A description thereof will be given later.

[0157] [Battery Cell]

[0158] A plurality of battery cells 300 may be provided.

[0159] The battery cell 300 may include a body 310 and a pair of electrodes 320 and 330 .

[0160] The body 310 may be disposed at a central portion in the first direction of the hollow space S. When the battery cell 300 is a pouch-type battery cell, the body 310 may be a portion wrapped with a pouch having a laminate of electrodes and separators stacked therein.

[0161] The pair of electrodes 320 and 330 may protrude from one side and the other side of the body 310 toward the first direction. When the battery cell 300 is a pouch type battery cell, the pair of electrodes 320 and 330 may be electrode tabs or electrode leads protruding outside the pouch.

[0162] A pair of electrodes 320 and 330 may contact the plurality of bus bars 200. For example, the electrodes 320 and 330 may penetrate holes provided in the bus bars 200 and then be bent and melted or welded to the bus bars 200. However, it is not limited to this configuration.

[0163] The plurality of battery cells 300 may be placed in the hollow space S of the case 100. The plurality of battery cells 300 may be arranged side by side in a second direction intersecting the first direction and the up-and-down direction.

[0164] The plurality of battery cells 300 may be connected in series or in parallel.

[0165] For example, as shown in the figure, eight banks of two battery cells 300 connected in parallel may be connected in series. However, it is not limited to this configuration.

[0166] In a battery cell row connected in parallel, the electrodes 320 and 330 of the plurality of battery cells 300 may be installed with the same polarity aligned in the second direction. In a pair of battery cell rows connected in series, the electrodes 320 and 330 of the battery cells 300 may be installed with opposite polarities aligned in the second direction.

[0167] The plurality of battery cells 300 may include a side battery cell 300a and another side battery cell 300b ( Figure 3 ). The one-side battery cell 300a and the other-side battery cell 300b may be battery cells 300 belonging to a pair of battery cell rows adjacent to each other, disposed adjacent to each other, and connected in series. A description thereof will be given later.

[0168] [barrier]

[0169] One or more barriers 400 may be provided. The one or more barriers 400 may extend in the first direction and in the up-down direction.

[0170] The lower end portion of the barrier 400 may be coupled to a portion of the upper surface of the base 110 of the housing 100 ( Figure 2 and Figure 6 ). The barrier 400 may be formed integrally with at least a portion of the housing 100, or may be formed separately. A description thereof will be given later.

[0171] In addition, the barrier 400 may be in contact with the first sidewall 120 , the second sidewall 130 , and the cover 160 of the housing 100 .

[0172] For example, the barrier 400 may be made of a material having excellent heat insulation properties, including aerogel, mica, ultra wool, and fiberglass. However, it is not limited to these materials. As another example, the barrier 400 may be a heat absorbing sheet made of a material that rapidly absorbs heat through a dehydration reaction.

[0173] The barrier 400 is installed between the main bodies 310 of a pair of battery cells 300 arranged adjacent to each other in the second direction to partition a central portion of the hollow space S of the case 100 in the first direction in the second direction.

[0174] In addition, the one or more barriers 400 may extend in the first direction to one end or the other end of the housing 100 in the first direction to partition one end or the other end of the hollow space S in the first direction in the second direction.

[0175] Therefore, heat transfer (propagation) between the central portion in the first direction of the inside of the case 100 and the battery cells 300 at one end or the other end of the case 100 may be delayed or prevented.

[0176] Therefore, even when a problem such as a short circuit occurs in some battery cells 300 causing a thermal runaway phenomenon, the thermal runaway phenomenon is prevented from rapidly spreading to other battery cells 300 , thereby reducing the possibility of fire or explosion of the battery module 10 .

[0177] In particular, one end or the other end in the first direction inside the housing 100 is separated by the barrier 400, and since the bus bar 200 connects a plurality of battery cells 300 in the housing 100, heat transfer between the battery cells 300 is inevitable. Therefore, heat transfer between the battery cells 300 can be effectively delayed or prevented.

[0178] In addition, since one end or the other end in the first direction inside the housing 100 is separated by the barrier 400, rapid heat transfer between non-adjacent battery cells 300 in the second direction having a large potential difference therebetween can be prevented from occurring at the one end or the other end. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced. A detailed description thereof is as follows.

[0179] When the battery cell row is composed of a number n of battery cells 300 (n is a natural number) arranged side by side in the second direction and connected in parallel (two in the figure), and a plurality of battery cell rows (eight in the figure) are connected in series in sequence, a pair of non-adjacent battery cells 300 in the second direction have a potential difference, which increases as the number of battery cells 300 or battery cell rows connected and arranged between a pair of battery cells 300 increases. As the potential difference increases, the possibility of problems such as short circuits in the battery cells 300 increases, so that the thermal runaway phenomenon may quickly spread to the battery cells 300 with a larger potential difference, resulting in a significantly increased probability of fire or explosion of the battery module 10. Therefore, when rapid heat transfer between the battery cells 300 is prevented by separating one end or the other end in the first direction inside the housing 100 with a barrier 400, the possibility of fire and explosion can be reduced.

[0180] For example, one or more barriers 400 may extend to one side or the other side in the first direction, respectively, and may contact the first sidewall 120 or the second sidewall 130 of the housing 100. Therefore, the one or more barriers 400 may separate one end or the other end of the hollow space S of the housing 100 in the first direction in the second direction.

[0181] Therefore, the housing 100 and the barrier 400 can be easily constructed with a simple configuration and at low cost.

[0182] The one or more barriers 400 may include a first barrier 400 a or a second barrier 400 b .

[0183] The first barrier 400a may extend toward one side in the first direction to contact the first sidewall 120. Therefore, the first barrier 400a may partition one end portion of the hollow space S of the housing 100 in the first direction in the second direction.

[0184] The first barrier 400 a may be at least partially spaced apart from the second sidewall 130 .

[0185] The second barrier 400b extends to the other side in the first direction and may contact the second sidewall 130 of the housing 100. Therefore, the second barrier 400b may partition the other end of the hollow space S of the housing 100 in the first direction in the second direction.

[0186] The second barrier 400 b may be at least partially spaced apart from the first sidewall 120 .

[0187] Here, the above-mentioned one-side bus bar 200a and the other-side bus bar 200b can be respectively installed on one side of the first barrier 400a in the first direction, on one side and the other side adjacent to the first barrier 400a in the second direction, wherein the first barrier 400a is located between the one side and the other side, and the one side and the other side are physically separated from each other; or respectively installed on one side of the second barrier 400b in the first direction, on the other side, on one side and the other side adjacent to the second barrier 400b in the second direction, wherein the second barrier 400b is located between the one side and the other side, and the one side and the other side are physically separated from each other.

[0188] In addition, the battery cells 300a on one side and the battery cells 300b on the other side may be respectively arranged on one side and the other side of the first barrier 400a in the second direction thereof, or respectively arranged on one side and the other side of the second barrier 400b in the second direction thereof, adjacent to the second barrier 400b.

[0189] A pair of electrodes 320 and 330 of the battery cell 300a on one side may contact the bus bar 200a on one side; and contact one of the bus bars 200 installed between the first barrier 400a and the second side wall 130 or between the second barrier 400b and the first side wall 120.

[0190] A pair of electrodes 320 and 330 of the other side battery cell 300b may contact the other side bus bar 200b; and contact one of the plurality of bus bars 200 installed between the first barrier 400a and the second side wall 130 or between the second barrier 400b and the first side wall 120.

[0191] Here, the space between the first barrier 400a and the second sidewall 130 may be defined by a space in which the first barrier 400a is at least partially spaced apart from the second sidewall 130. In addition, the space between the second barrier 400b and the first sidewall 120 may be defined by a space in which the second barrier 400b is at least partially spaced apart from the first sidewall 120.

[0192] Therefore, the one-side battery cell 300 a and the other-side battery cell 300 b may be connected to each other in series.

[0193] Therefore, since the one side bus bar 200a and the other side bus bar 200b are physically separated from each other in such a manner that the first barrier 400a or the second barrier 400b is located therebetween, one end or the other end in the first direction inside the housing 100 is clearly separated by the first barrier 400a or the second barrier 400b. Therefore, heat transfer between the battery cells 300 can be effectively delayed or prevented.

[0194] In addition, even when the electrodes 330 or 320 on one side in the first direction of the one-side battery cell 300a and the other-side battery cell 300b are not connected to each other due to the physical separation between the one-side bus bar 200a and the other-side bus bar 200b, the electrodes 330 or 320 on the other side in the first direction of the one-side battery cell 300a and the other-side battery cell 300b can be electrically connected to each other (in series). That is, while the one-side battery cell 300a is electrically connected to the other-side battery cell 300b, one end or the other end in the first direction inside the housing 100 is clearly separated by the first barrier 400a or the second barrier 400b.

[0195] Furthermore, contrary to what is shown in the drawings, the one side bus bar 200a and the other side bus bar 200b may not be physically separated. For example, the one side bus bar 200a and the other side bus bar 200b may be connected to each other while passing through the first barrier 400a or the second barrier 400b.

[0196] A plurality of barriers 400 may be provided.

[0197] The plurality of barriers 400 may include one or more first barriers 400 a and one or more second barriers 400 b .

[0198] The one or more first barriers 400 a may extend to one end portion of the housing 100 in the first direction so as to partition one end portion of the hollow space S of the housing 100 in the first direction in the second direction.

[0199] The one or more second barriers 400 b may extend to the other end of the housing 100 in the first direction so as to partition the other end of the hollow space S of the housing 100 in the first direction in the second direction.

[0200] The first barriers 400 a and the second barriers 400 b may be alternately arranged along the second direction.

[0201] The bus bars 200 respectively installed at one side and the other side in the first direction of one side in the second direction of the first barrier 400a may be physically separated from each other in such a manner that the first barrier 400a is located therebetween. For example, as described above, the one side bus bar 200a and the other side bus bar 200b respectively installed at one side and the other side in the first direction of one side in the second direction of the first barrier 400a adjacent to the first barrier 400a may be physically separated from each other in such a manner that the first barrier 400a is located therebetween.

[0202] The busbars 200 respectively installed on one side and the other side in the first direction of the other side in the second direction of the second barrier 400b may be physically separated from each other in such a manner that the second barrier 400b is located therebetween. For example, as described above, the one side busbar 200a and the other side busbar 200b respectively installed adjacent to the second barrier 400b on one side and the other side in the first direction of the other side of the second barrier 400b may be physically separated from each other in such a manner that the second barrier 400b is located therebetween.

[0203] Therefore, since the bus bars 200 are physically separated from each other in such a manner that the first barrier 400a and the second barrier 400b are located therebetween, one end and the other end in the first direction inside the housing 100 are clearly separated by the first barrier 400a and the second barrier 400b. Therefore, heat transfer between the battery cells 300 can be effectively delayed or prevented.

[0204] In addition, even when one electrode at one side in the first direction of the battery cell 300 disposed on one side and the other side in the second direction of the first barrier 400a and the second barrier 400b is not connected to each other due to the physical separation between the bus bar 200 between which the first barrier 400a and the second barrier 400b are located, the electrode located on the other side may be electrically connected to each other (in series) by the bus bar 200c installed on the other side in the first direction of the first barrier 400a or by the bus bar 200c installed on one side in the first direction of the second barrier 400b. That is, while the battery cell 300 is electrically connected, one end and the other end in the first direction inside the housing 100 are clearly separated by the first barrier 400a and the second barrier 400b.

[0205] Furthermore, contrary to the drawings, the bus bars 200 may not be physically separated from each other in such a manner that the first barrier 400a or the second barrier 400b is located therebetween. For example, the bus bars 200 may be connected to each other while passing through the first barrier 400a or the second barrier 400b.

[0206] One or more first barriers 400a may not partition the other end of the hollow space S of the housing 100 in the first direction in the second direction. In addition, one or more second barriers 400b may not partition one end of the hollow space S of the housing 100 in the first direction in the second direction.

[0207] Therefore, for example, when flame, heat, or gas is generated in the battery cells 300 placed on one side of the second direction, Figure 4 As shown by the dashed arrow A, the flame, heat or gas can reach other battery cells 300 by repeatedly moving back and forth between the two ends of the housing 100 in the first direction.

[0208] Therefore, the flame, heat or gas generated from the battery cell 300 can be transferred / propagated / diffused in the second direction through one end or the other end of the housing 100 in the first direction that is not separated by the first barrier 400a and the second barrier 400b. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced.

[0209] Furthermore, since the flame, heat, or gas generated from the battery cell 300 can reach another battery cell 300 only by repeatedly moving back and forth in the first direction between both ends of the housing 100, the transfer of the flame, heat, or gas between the battery cells 300 can be delayed. Therefore, the possibility of fire or explosion of the battery module 10 can be reduced.

[0210] Furthermore, since flame or heat generated from the battery cells 300 sequentially propagates in the second direction toward adjacent battery cells 300 having a smaller potential difference, the possibility of fire or explosion of the battery module 10 is reduced, and even if fire or explosion occurs, damage can be reduced.

[0211] Furthermore, since the lengths of the first and second barriers 400 a and 400 b in the first direction are reduced, the battery module 10 may be lightweight.

[0212] In addition, a hollow space can be provided in which the bus bar 200 can be installed on the other side of the first barrier 400a in the first direction and on one side of the second barrier 400b in the first direction. Therefore, in order to perform insertion installation or penetration installation of the bus bar 200 on the other side of the first barrier 400a in the first direction and on one side of the first barrier 400b in the first direction, it is not necessary to process the first barrier 400a and the second barrier 400b. Therefore, the manufacturing cost of the battery module 10 can be reduced, and the manufacturing time can be shortened.

[0213] Here, at least a portion of the plurality of bus bars 200 may be installed on the other side of the first barrier 400 a in the first direction or on one side of the second barrier 400 b in the first direction.

[0214] Therefore, since the bus bar 200 can be easily installed and replaced, the manufacturing and maintenance costs of the battery module 10 can be reduced.

[0215] In addition, one or more exhaust holes 162 may be provided at an upper portion of one or more first barriers 400a on the other side in the first direction or at an upper portion of one or more second barriers 400b on one side in the first direction ( Figure 5 ). Here, Figure 4 As shown by the dotted arrow A, the other side of the first direction of the first barrier 400a and the one side of the first direction of the second barrier 400b are places where the transfer (propagation) direction of flame, heat or gas changes rapidly.

[0216] Therefore, since the exhaust holes 162 are provided in the region where the transfer (propagation) direction of the flame, heat or gas changes rapidly, even if the number or size of the exhaust holes 162 is small, the accumulation or concentration of the flame, heat or gas is prevented, and the flame, heat or gas can be effectively discharged to the outside of the housing 100. Therefore, the possibility of the battery module 10 catching fire or exploding can be reduced.

[0217] Furthermore, contrary to the drawing, the first barrier 400a may extend in the first direction to the other end of the housing 100 in the first direction to partition the other end of the hollow space S in the second direction. Here, the bus bar 200 may be installed to penetrate the other side of the first barrier 400a in the first direction.

[0218] In addition, contrary to the drawing, the second barrier 400b may extend in the first direction to one end of the housing 100 in the first direction to partition one end of the hollow space S in the second direction in the first direction. Here, the bus bar 200 may be installed to penetrate one side in the first direction of the first barrier 400a.

[0219] [Battery module manufacturing method]

[0220] Reference Figure 7 , a method S500 of manufacturing a battery module according to one embodiment may include a case manufacturing step S510 and an assembling step S520 .

[0221] In the case manufacturing step S510, the case 100 may be manufactured. The case 100 may be formed by extrusion rather than using a press working method.

[0222] Here, at least a portion of the barrier 400 among the one or more barriers 400 may be integrally pressed with at least a portion of the housing 100 .

[0223] Therefore, the manufacturing cost of the battery module 10 can be reduced, and the manufacturing time can be shortened.

[0224] Specifically, for example, in the housing 100, at least a portion 110a of the base 110, a portion 140a of the third side wall 140 and a portion 150b of the fourth side wall 150, and at least a portion of one or more barriers 400 may be integrally extruded ( Figure 2 Part C and Figure 6 ).

[0225] Therefore, the manufacturing cost of the battery module 10 can be reduced, and the manufacturing time can be shortened.

[0226] After integrally extruding at least a portion of the housing 100 and at least a portion of the one or more barriers 400, both ends may be cut in the first direction so that the plurality of barriers 400 alternately protrude toward both sides of the first direction. Figure 2 Part C shown in .

[0227] However, it is not limited to this configuration. That is, in the housing manufacturing step S510 , the barrier 400 may not be manufactured integrally with at least a portion of the housing 100 .

[0228] In the assembling step S520, the bus bar 200 may be installed inside the case 100, and the battery cell 300 may be placed. The electrodes 320 and 330 of the battery cell 300 and the bus bar 200 may be coupled in advance.

[0229] In addition, when the barrier 400 is not integrally manufactured with at least a portion of the case 100 , the barrier 400 manufactured separately from the case 100 may be attached to the case 100 before the battery cells 300 are placed and the bus bars 200 are mounted in the assembling step S520 .

[0230] It should be understood that the described embodiments are illustrative in all aspects and not restrictive, and the scope of the present invention will be indicated by the appended claims rather than by the described detailed description. And the meaning and scope of the claims to be described later, as well as all changes and modifications derived from equivalent concepts should be interpreted as being included within the scope of the present invention.

[0231] Although the present invention has been described with reference to the example drawings, it is to 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 may be made without departing from the scope and concept of the present invention. In addition, although the operational effects of the configuration according to the present invention are not explicitly described when describing the embodiments of the present invention, it should be understood that the predictable effects are also to be identified by the configuration.

Claims

1. A battery module, comprising: A housing (100) having a hollow space (S) therein; A plurality of bus bars (200) installed at one end and the other end of the hollow space (S) in a first direction; A plurality of battery cells (300) are arranged in the hollow space (S) and along a second direction intersecting the first direction and the up-down direction, wherein each of the plurality of battery cells (300) comprises: a body (310) arranged at a central portion of the hollow space (S) in the first direction; and a pair of electrodes (320, 330) contacting the plurality of bus bars (200) and protruding from the body (310) toward one side and the other side of the first direction; and one or more barriers (400), the one or more barriers extending in the first direction and the up-down direction, wherein each of the one or more barriers (400) is disposed between the main bodies (310) of a pair of battery cells (300) adjacent to each other in the second direction to separate the central portion of the hollow space in the first direction in the second direction; and the one or more barriers extend to the one end or the other end of the housing (100) in the first direction to separate the one end or the other end of the hollow space (S) in the first direction in the second direction, wherein a pair of bus bars among the plurality of bus bars (200) installed on one side and the other side in the second direction of each of the one or more barriers (400) are physically separated in the second direction by the one or more barriers (400), and each of the one or more barriers (400) is located between the pair of bus bars (200).

2. The battery module according to claim 1, wherein: The housing (100) comprises: a base (110) extending in the first direction and the second direction; and a first side wall (120) and a second side wall (130), the first side wall extending in an upward direction from one end of the base (110) in the first direction, and the second side wall extending in the upward direction from the other end of the base (110) in the first direction, and Each of the one or more barriers (400) extends to the one side or the other side in the first direction to contact the first side wall (120) or the second side wall (130) and separates the one end or the other end in the first direction of the hollow space (S) in the second direction.

3. The battery module according to claim 2, wherein: The one or more barriers (400) include: a first barrier (400a), the first barrier extending toward one side of the first direction to contact the first side wall (120), separating one end of the hollow space (S) in the first direction in the second direction, and at least partially separating from the second side wall (130); or a second barrier (400b), the second barrier extending toward the other side of the first direction to contact the second side wall (130), separating the other end of the hollow space (S) in the first direction in the second direction, and at least partially separating from the first side wall (120), The plurality of bus bars (200) include a bus bar (200a) on one side and a bus bar (200b) on the other side, wherein the bus bar (200a) on one side and the bus bar (200b) on the other side are respectively installed on: one side of the first barrier (400a) in the first direction, one side and the other side adjacent to the first barrier (400a) in the second direction, wherein the first barrier (400a) is located between the bus bar (200a) on one side and the bus bar (200b) on the other side, and the bus bar (200a) on the other side is installed on the first side of the first barrier (400a) in the second direction. The side bus bar (200a) and the other side bus bar (200b) are physically separated from each other; or are respectively installed on one side and the other side of the second barrier (400b) in the second direction and the other side of the other side in the first direction, wherein the second barrier (400b) is located between the one side bus bar (200a) and the other side bus bar (200b), and the one side bus bar (200a) and the other side bus bar (200b) are physically separated from each other, The plurality of battery cells (300) include a battery cell on one side (300a) and a battery cell on the other side (300b), wherein the battery cell on one side (300a) and the battery cell on the other side (300b) are respectively arranged on one side and the other side of the first barrier (400a) in the second direction adjacent to the first barrier (400a); or are respectively arranged on one side and the other side of the second barrier (400b) in the second direction adjacent to the second barrier (400b), A pair of electrodes (320, 330) of the battery cell (300a) on one side is in contact with the bus bar (200a) on one side; and is in contact with a bus bar among the plurality of bus bars (200) installed between the first barrier (400a) and the second side wall (130) or installed between the second barrier (400b) and the first side wall (120), A pair of electrodes (320, 330) of the battery cell (300b) on the other side is in contact with the bus bar (200b) on the other side; and is in contact with a bus bar among the plurality of bus bars (200) installed between the first barrier (400a) and the second side wall (130) or installed between the second barrier (400b) and the first side wall (120); and The one-side battery cell (300a) and the other-side battery cell (300b) are connected in series.

4. The battery module according to claim 1, wherein: Setting a plurality of barriers (400), The plurality of barriers (400) include: one or more first barriers (400a), the one or more first barriers extending to one end of the shell (100) in the first direction to separate the one end of the hollow space (S) in the first direction in the second direction; and one or more second barriers (400b), the one or more second barriers extending to the other end of the shell (100) in the first direction to separate the other end of the hollow space (S) in the first direction in the second direction. The one or more first barriers (400a) and the one or more second barriers (400b) are alternately arranged along the second direction, The bus bars (200) installed on each of one side in the first direction, one side in the second direction, and the other side of the one or more first barriers (400a) are physically separated from each other, and the one or more first barriers (400a) are located between the bus bars (200), and The bus bars (200) installed on each of one side and the other side in the second direction on the other side in the first direction of the one or more second barriers (400b) are physically separated from each other, and the one or more second barriers (400b) are located between the bus bars (200).

5. The battery module according to claim 1, wherein: Setting a plurality of barriers (400), The plurality of barriers (400) include: one or more first barriers (400a), the one or more first barriers extending to the one end of the shell (100) in the first direction to separate the one end of the hollow space (S) in the first direction in the second direction; and one or more second barriers (400b), the one or more second barriers extending to the other end of the shell (100) in the first direction to separate the other end of the hollow space (S) in the first direction in the second direction. The one or more first barriers (400a) do not separate the other end of the hollow space (S) in the first direction in the second direction, The one or more second barriers (400b) do not separate the one end of the hollow space (S) in the first direction in the second direction, and The one or more first barriers (400a) and the one or more second barriers (400b) are alternately arranged along the second direction.

6. The battery module according to claim 5, wherein: At least a portion of the plurality of bus bars (200) is installed on the other side of the one or more first barriers (400a) in the first direction, or is installed on one side of the one or more second barriers (400b) in the first direction.

7. The battery module according to claim 1, wherein: The housing (100) includes a cover (160) covering an upper portion of the hollow space (S), wherein the cover (160) is provided with one or more exhaust holes (162) penetrating the cover (160) for exhausting flames, heat or gas generated from the battery cell (300) installed in the hollow space (S) to the outside of the housing (100).

8. The battery module according to claim 7, wherein: Setting a plurality of barriers (400), The plurality of barriers (400) include: one or more first barriers (400a), the one or more first barriers extending to the one end of the shell (100) in the first direction to separate the one end of the hollow space (S) in the first direction in the second direction; and one or more second barriers (400b), the one or more second barriers extending to the other end of the shell (100) in the first direction to separate the other end of the hollow space (S) in the first direction in the second direction. The one or more first barriers (400a) do not separate the other end of the hollow space (S) in the first direction in the second direction, The one or more second barriers (400b) do not separate the one end of the hollow space (S) in the first direction in the second direction, The one or more first barriers (400a) and the one or more second barriers (400b) are alternately arranged along the second direction, and The one or more exhaust holes (162) are provided at an upper portion of the one or more first barriers (400a) on the other side of the first direction or at an upper portion of the one or more second barriers (400b) on one side of the first direction.

9. A method for manufacturing a battery module according to any one of claims 1 to 8, the method comprising the following steps: A shell manufacturing step (S510), wherein the shell manufacturing step manufactures the shell (100), Wherein, in the shell manufacturing step (S510), at least a portion of the shell (100) and at least a portion of the one or more barriers (400) are integrally extruded.

10. The manufacturing method according to claim 9, wherein: The housing (100) comprises: a base (110) extending in a first direction and a second direction; a third side wall (140) extending in an upward direction from one end of the base (110) in the second direction; and a fourth side wall (150) extending in the upward direction from the other end of the base (110). At least a portion of the one or more barriers (400) is coupled to at least a portion of an upper surface of the base (110), and In the shell manufacturing step (S510), at least a portion of the base (110), at least a portion of the third side wall (140), at least a portion of the fourth side wall (150), and at least a portion of the one or more barriers (400) are integrally extruded.

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