Battery pack case and battery pack comprising same

Abstract

A battery pack case is disclosed. The battery pack case of the present invention may comprise: a bottom plate; the side shell is formed by extending upwards from the periphery of the bottom plate and forms an accommodating space together with the bottom plate; the partition plate unit is located on the upper surface of the bottom plate and used for partitioning the containing space, and the partition plate unit can comprise a partition plate supporting module combined to the bottom plate; and a bulkhead heat insulation module coupled to the bulkhead support module, and having a heat insulation space formed therein as a hollow portion.

Description

Technical Field

[0001] The present invention relates to a battery pack casing and a battery pack including the battery pack casing, and in particular to a battery pack casing that utilizes a heat-insulating space to suppress the fire transfer of a battery cell and a battery pack including the battery pack casing. Background Art

[0002] When a secondary battery cell catches fire due to overcurrent or overheating, the flame may spread to other battery cells. In this case, a chain fire may occur in multiple battery cells.

[0003] In particular, in the case of an electric vehicle provided with a battery module composed of a plurality of secondary cells, or an electric vehicle provided with a plurality of secondary cells, if the transfer of fire between cells or between battery modules cannot be effectively suppressed, the safety of the electric vehicle passengers may become a problem. Therefore, the battery pack housing for electric vehicles and the like may require a structure that suppresses the transfer of fire from the cells.

[0004] (Patent Document 1) KR 10-2282482 B1 Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] The present invention aims to solve the above-mentioned and other problems.

[0007] Another object of the present invention is to provide a battery pack case that suppresses fire transfer between a plurality of battery modules and a battery pack including the battery pack case.

[0008] Another object of the present invention is to provide a battery pack case that suppresses fire transfer between divided accommodation spaces and a battery pack including the battery pack case.

[0009] Another object of the present invention is to provide a battery pack case in which a partition unit serving as a cross member is provided with a heat insulating space, and a battery pack including the battery pack case.

[0010] Another object of the present invention is to provide a battery pack case having a side heat insulating space formed in a side case and a battery pack including the battery pack case.

[0011] Another object of the present invention is to provide a battery pack case that sprays a fire extinguishing agent when the pressure of a hollow portion reaches a predetermined pressure or more, and a battery pack including the battery pack case.

[0012] (II) Technical solution

[0013] In order to achieve the above-mentioned purpose or other purposes, according to one aspect of the present invention, a battery pack housing can be provided, which includes: a bottom plate; a side housing, which extends upward from the periphery of the bottom plate and forms a accommodating space together with the bottom plate; and a partition unit, which is located on the upper surface of the bottom plate and is used to separate the accommodating space, and the partition unit includes: a partition support module, which is coupled to the bottom plate; and a partition insulation module, which is coupled to the partition support module, and an insulation space as a hollow portion is formed inside the partition insulation module.

[0014] According to another aspect of the present invention, a battery pack can be provided, which includes: a plurality of battery cell groups, each of the plurality of battery cell groups includes a plurality of battery cells; and a battery pack shell for accommodating the plurality of battery cell groups, the battery pack shell including: a bottom plate; a side shell extending upward from the periphery of the bottom plate and forming a accommodating space together with the bottom plate; and a partition unit located on the upper surface of the bottom plate for separating the accommodating space, the partition unit including: a partition support module coupled to the bottom plate; and a partition insulation module coupled to the partition support module, and an insulation space as a hollow portion is formed inside the partition insulation module.

[0015] (III) Beneficial effects

[0016] The effects of the battery pack case according to the present invention will be described below.

[0017] According to at least one of the embodiments of the present invention, a battery pack case that suppresses fire transfer between a plurality of battery modules and a battery pack including the battery pack case can be provided.

[0018] According to at least one of the embodiments of the present invention, a battery pack case that suppresses fire transfer between divided accommodation spaces and a battery pack including the battery pack case can be provided.

[0019] According to at least one of the embodiments of the present invention, a battery pack case in which a partition unit as a cross member is provided with a heat insulating space and a battery pack including the battery pack case can be provided.

[0020] According to at least one of the embodiments of the present invention, a battery pack case having a side heat insulation space formed in a side case and a battery pack including the battery pack case can be provided.

[0021] According to at least one of the embodiments of the present invention, a battery case that sprays a fire extinguishing agent when the pressure of a hollow portion reaches a predetermined pressure or more, and a battery pack including the battery case can be provided.

[0022] Additional scopes to which the present invention can be applied will become clear from the following detailed description. However, those skilled in the art can clearly understand various changes and modifications within the concept and scope of the present invention, and therefore, it should be understood that the detailed description and specific embodiments such as the preferred embodiments of the present invention are only exemplary. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a diagram showing a battery pack case according to one embodiment of the present invention.

[0024] Figure 2 is a diagram illustrating a battery pack case formed with a second separator unit according to one embodiment of the present invention.

[0025] Figure 3 Yes Figure 1 A cross-sectional view of the battery pack casing cut along line AA.

[0026] Figure 4 It is shown in detail Figure 3 Figure 1. Diagram of the thermal insulation module.

[0027] Figure 5 Yes Figure 1 A cross-sectional view of the partition unit cut along line AA shows a first partition insulation module and a second partition insulation module separated from each other.

[0028] Figure 6 It is shown in detail Figure 5 Figure 2 shows a first partition insulation module and a second partition insulation module.

[0029] Figure 7 Yes Figure 1 The cross-sectional view of the partition unit cut along the AA line shows the state in which the insulation member is arranged between the first partition insulation module and the second partition insulation module.

[0030] Figure 8 Yes Figure 1 The cross-sectional view of the partition unit cut along the AA line shows the state in which the partition insulation module is arranged between the first partition support module and the second partition support module.

[0031] Fig. 9 Yes Figure 1 A cross-sectional view of the battery pack casing cut along line B1-B2.

[0032] Fig.10 It is shown in detail Fig. 9 Diagram of the side insulation module shown.

[0033] Fig.11 Yes Figure 1A cross-sectional view of the partition unit cut along line AA shows a state in which a fire extinguishing component is formed on the partition leg component.

[0034] Fig.12 It is shown in detail Fig.11 Figure 1.2 shows the “C” portion of the diagram.

[0035] Fig.13 It is cutting Figure 1 sectional view of a battery pack housing showing a state in which a portion of the bottom housing is integrally formed with the partition support module.

[0036] Fig.14 is a diagram showing a battery module according to one embodiment of the present invention.

[0037] Fig.15 is a diagram showing a battery cell group according to one embodiment of the present invention.

[0038] Fig.16 is a diagram showing a state in which a battery module is accommodated in a battery pack case.

[0039] Fig.17 It is a diagram showing a state where the battery cell group is accommodated in the battery pack case. DETAILED DESCRIPTION

[0040] Hereinafter, the embodiments disclosed in this specification are described in detail with reference to the accompanying drawings. For the same or similar components, the same figure numbers are assigned, and repeated descriptions are omitted. The suffixes "module" and "unit" of the components used in the following description are only assigned or mixed for the convenience of writing the specification, and they themselves do not have a meaning or function to distinguish each other. In addition, when describing the embodiments disclosed in this specification, if it is judged that the specific description of the relevant known technology will blur the key points of the embodiments disclosed in this specification, its detailed description will be omitted. In addition, the drawings are provided to facilitate the understanding of the embodiments disclosed in this specification. The drawings do not limit the technical ideas disclosed in this specification, and should be understood to include all changes, equivalents and substitutes within the scope of the ideas and technologies of the present invention.

[0041] Terms including ordinal numbers such as "first", "second", etc. may be used to describe various components, but the components are not limited by the terms. The terms are only used to distinguish one component from other components.

[0042] When it is mentioned that a certain component is “connected” to another component or is “connected to” another component, it should be understood that the component can be directly connected to the other component or is connected to the other component, or other components may be present in between. On the other hand, when it is mentioned that a certain component is “directly connected to” another component or is “directly connected to” another component, it should be understood that no other components are present in between.

[0043] Unless the context clearly indicates otherwise, an expression in the singular includes an expression in the plural.

[0044] In the present application, it should be understood that terms such as “including” or “having” are intended to specify the presence of features, numbers, steps, operations, components, parts or a combination thereof recorded in the specification, and do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or a combination thereof.

[0045] In the drawings, the size of the components may be exaggerated or reduced for the convenience of explanation. For example, the size and thickness of each component in the drawings are arbitrarily shown for the convenience of explanation, and therefore the present invention is not necessarily limited to the contents shown.

[0046] In the case where some embodiments can be implemented in different ways, a specific process order can be performed differently from the order described. For example, two processes described in succession can be performed substantially simultaneously, or in the order opposite to the order described.

[0047] In the following embodiments, when referring to the connection of films, regions, components, etc., it includes not only the case where the films, regions, components are directly connected, but also the case where the films, regions, components are indirectly connected with other films, regions, components in between. For example, in this specification, when referring to the electrical connection of films, regions, components, etc., it includes not only the case where the films, regions, components, etc. are directly electrically connected, but also the case where other films, regions, components, etc. are indirectly electrically connected in between.

[0048] Figure 1 is a diagram showing a battery pack case according to one embodiment of the present invention.

[0049] Reference Figure 1 The battery pack housing 10 can accommodate at least one battery module 30 (refer to Fig.14 ). Battery module 30 (refer to Fig.14 ) may include a plurality of cells 36 (refer to Fig.15 ). Battery pack 1 (refer to Fig.16 ) may include a battery pack housing 10 and a battery module 30 (refer to Fig.14 ).

[0050] For example, battery pack 1 (refer to Fig.16 and Fig.17 ) can be installed in an electric vehicle and become the electric power source of the electric vehicle. For example, the battery pack 1 (refer to Fig.16 and Fig.17 ) can be installed on the lower part of an electric vehicle.

[0051] The battery pack housing 10 can accommodate a plurality of battery cells 36 (see Fig.15For example, multiple battery cells 36 (refer to Fig.15 ) can be assembled into a battery module 30 (refer to Fig.14 ) and then housed in the battery pack housing 10.

[0052] As another example, the plurality of battery cells 36 (see Fig.15 ) can be directly accommodated in the battery pack case 10. That is, the battery pack 1 may include a battery pack case 10 and a plurality of battery cells 36 (refer to Fig.15 ).

[0053] When a fire occurs in a battery cell, the fire may be easily transferred to an adjacent battery cell or an adjacent battery module. Therefore, the battery pack housing 10 may need a structure to block the transfer of fire from the battery cell.

[0054] The battery pack housing 10 may include a bottom case 100. The bottom case 100 may be located between at least one battery module 30 (see Fig.14 ) or multiple cells 36 (refer to Fig.15 ). For example, the bottom housing 100 may form the bottom of the battery pack housing 10. For example, the bottom housing 100 may form the lower surface (or bottom surface) of the electric vehicle.

[0055] The bottom case 100 may be formed in a plate shape. The bottom case 100 may be formed in a quadrangular shape as a whole. For example, the upper surface and the lower surface of the bottom case 100 may be in a quadrangular shape.

[0056] The upper and lower surfaces of the bottom case 100 may be in a rectangular shape. For example, the four sides of the bottom case 100 may include two short edges and two long edges.

[0057] For example, the bottom case 100 may be formed in a shape extending from one side to the other side. The one side and the other side of the bottom case 100 may be short edges of the bottom case 100 .

[0058] The two long sides of the bottom case 100 may connect the two short sides of the bottom case 100. The extending direction of the bottom case 100 may be the length direction of the battery pack case 10. The direction connecting the two long sides of the bottom case 100 may be the width direction of the battery pack case 10.

[0059] The battery pack case 10 may include a side case 200. The side case 200 may be formed along edges of the bottom case 100. For example, the side case 200 may be formed extending upward from an edge or an edge portion of the bottom case 100.

[0060] The side case 200 may include a first side case 201. The first side case 201 may be formed along a long side or a long edge portion of the bottom case 100. For example, the first side case 201 may be formed in a shape extending upward from a long side or a long edge portion of the bottom case 100. The first side case 201 may be formed in a shape extending in a length direction of the battery pack case 10.

[0061] The first side housing 201 may be provided in plurality. For example, the first side housing 201 may include a pair of first side housings 201. The pair of first side housings 201 may be formed in a shape extending upward from the two long sides of the bottom housing 100, respectively. The pair of first side housings 201 may be spaced apart from each other and face each other. The direction in which the pair of first side housings 201 face each other may be the width direction of the battery pack housing 10.

[0062] The side case 200 may include a second side case 202. The second side case 202 may be formed along a short side or a short edge portion of the bottom case 100. For example, the second side case 202 may be formed in a shape extending upward from a short side or a short edge portion of the bottom case 100. The second side case 202 may be formed in a shape extending in a width direction of the battery pack case 10.

[0063] The second side housing 202 may be provided in plurality. For example, the second side housing 202 may include a pair of second side housings 202. The pair of second side housings 202 may be formed in a shape extending upward from the two short sides of the bottom housing 100, respectively. The pair of second side housings 202 may be spaced apart from each other and face each other. The direction in which the pair of second side housings 202 face each other may be the length direction or the longitudinal direction of the battery pack housing 10.

[0064] The side case 200 and the bottom case 100 may form a receiving space 15. The upper portion of the receiving space 15 may be open. The receiving space 15 may be a space where a battery module or a battery cell is located. The bottom case 100 and the side case 200 may form a boundary of the receiving space 15.

[0065] The battery pack case 10 may include a partition unit 300. The partition unit 300 may be located on an upper surface of the bottom case 100. The partition unit 300 may be located in the accommodation space 15. The partition unit 300 may be formed in a shape extending upward from an upper surface of the bottom case 100.

[0066] The partition unit 300 may be surrounded by the side case 200. For example, the partition unit 300 may be located between a pair of first side cases 201. For example, the partition unit 300 may be located between a pair of second side cases 202.

[0067] The partition unit 300 may include a first partition unit 301. The first partition unit 301 may be connected or coupled to the first side case 201. The first partition unit 301 may extend from one of the pair of first side cases 201 to the other of the pair of first side cases 201. The first partition unit 301 may be formed in a shape extending in a width direction of the battery pack case 10.

[0068] The partition unit 300 may partition the accommodation space 15 into a plurality of spaces. For example, a plurality of accommodation spaces 15 partitioned by the first partition unit 301 may be disposed along the length direction of the battery pack case 10.

[0069] Figure 2 is a diagram illustrating a battery pack case formed with a second separator unit according to one embodiment of the present invention.

[0070] Reference Figure 2 , the partition unit 300 may include a second partition unit 302. The second partition unit 302 may be connected or coupled to the second side case 202.

[0071] The second separator unit 302 may extend from one of the pair of second side cases 202 to the other of the pair of second side cases 202. The second separator unit 302 may be formed in a shape extending in a length direction of the battery pack case 10.

[0072] The second separator unit 302 may divide the accommodation space 15 into a plurality. For example, the plurality of accommodation spaces 15 divided by the second separator unit 302 may be arranged along the width direction of the battery pack case 10. The second separator unit 302 and the first separator unit 301 may cross each other.

[0073] The first separator unit 301 and the second separator unit 302 may cross each other. As the first separator unit 301 and the second separator unit 302 cross, the battery pack case 10 as a whole may form a lattice shape.

[0074] Figure 3 Yes Figure 1 A cross-sectional view of the battery pack casing cut along line AA.

[0075] Reference Figure 3 , the partition unit 300 may include a partition support module 310. The partition support module 310 may be disposed on the upper surface of the bottom housing 100. The partition support module 310 may be coupled or fixed to the upper surface of the bottom housing 100.

[0076] For example, the partition support module 310 may be welded to the upper surface of the bottom housing 100. For example, the partition support module 310 may be attached to the upper surface of the bottom housing 100 by an adhesive. The partition support module 310 may be a bottom housing 100 and a side housing 200 (see Figure 1 ) provides rigidity.

[0077] The partition unit 300 may include a partition insulation module 320. The partition insulation module 320 may be coupled to the partition support module 310. For example, the partition insulation module 320 may cover the upper surface and the side surface of the partition support module 310. For example, the partition insulation module 320 may face the battery module 30 (refer to Fig.14 ) or battery cell 36 (refer to Fig.15 ).

[0078] The partition insulation module 320 may form a partition insulation space 325. The partition insulation space 325 may be a hollow portion formed in the partition insulation module 320. The pressure of the partition insulation space 325 may be lower than 1 atmosphere. For example, the pressure of the partition insulation space 325 may be close to 0 atmosphere. In this case, the partition insulation module 320 may be referred to as a "vacuum structure".

[0079] The partition insulation space 325 may have relatively excellent insulation performance. When a fire occurs on one side of the partition unit 300 , the partition insulation space 325 may suppress heat generated by the fire from moving to the other side of the partition unit 300 .

[0080] Figure 4 It is shown in detail Figure 3 Figure 1. Diagram of the thermal insulation module.

[0081] Reference Figure 4 The partition insulation module 320 may include a partition leg part 3210 and a partition head part 3220. The partition leg part 3210 may face the partition support module 310 (refer to Figure 3 ) side.

[0082] The partition leg member 3210 may include a first partition leg plate 3211. The first partition leg plate 3211 may face the partition support module 310 (refer to Figure 3 ).

[0083] The separator leg member 3210 may include a second separator leg plate 3212. The second separator leg plate 3212 may be located on an opposite side of the first separator leg plate 3211. The second separator leg plate 3212 may face the battery module 30 (refer to Fig.14) or battery cell 36 (refer to Fig.15 ).

[0084] The partition leg member 3210 may include a third partition leg plate 3213. The third partition leg plate 3213 may connect the first partition leg plate 3211 and the second partition leg plate 3212.

[0085] For example, the third partition leg plate 3213 may connect the lower end of the first partition leg plate 3111 and the lower end of the second partition leg plate 3212. The third partition leg plate 3213 may form the bottom of the partition leg member 3210.

[0086] The third partition leg plate 3213 may face the bottom plate 100 (refer to Figure 1 ). For example, the third partition leg plate 3213 can be fixed, combined or attached to the bottom plate 100 (refer to Figure 1 )superior.

[0087] The partition leg member 3210 may include a plurality of partition leg members 3210. For example, the partition leg member 3210 may include a first partition leg member 3210a and a second partition leg member 3210b. The first partition leg member 3210a and the second partition leg member 3210b may be spaced apart from the partition support module 310 (refer to Figure 3 )set up.

[0088] A hollow portion may be formed inside the partition leg member 3210. For example, the hollow portion formed inside the partition leg member 3210 may form a part of the partition insulation space 325.

[0089] The partition head component 3220 can be disposed on the partition support module 310 (refer to Figure 3 ). The partition head component 3220 may connect the first partition leg component 3210a and the second partition leg component 3210b. A hollow portion may be formed inside the partition head component 3220. For example, the hollow portion formed inside the partition head component 3220 may form another part of the partition insulation space 325.

[0090] The hollow portion formed in the partition head part 3220 may communicate with the hollow portion formed in the partition leg part 3210. The partition insulation space 325 may include the hollow portion formed in the partition leg part 3210 and the hollow portion formed in the partition head part 3220.

[0091] The partition head component 3220 may include a first partition head plate 3221. The first partition head plate 3221 may face the partition support module 310 (refer to Figure 3 ). The first baffle head plate 3221 may be connected to the first baffle leg plate 3211 .

[0092] For example, the first diaphragm header plate 3221 may extend from the upper end of the first diaphragm leg plate 3211 of the first diaphragm leg member 3210a to the upper end of the first diaphragm leg plate 3211 of the second diaphragm leg member 3210b.

[0093] The partition head component 3220 may include a second partition head plate 3222. The second partition head plate 3222 may be spaced apart from the first partition head plate 3221 and located above the first partition head plate 3221. The second partition head plate 3222 may form an upper surface of the partition head component 3220.

[0094] The second bulkhead plate 3222 may be connected to the second bulkhead leg plate 3212. For example, the second bulkhead plate 3222 may extend from the upper end of the second bulkhead leg plate 3212 of the first bulkhead leg member 3210a to the upper end of the second bulkhead leg plate 3212 of the second bulkhead leg member 3210b.

[0095] The partition insulation module 320 may be made of a material including metal. In this case, when the partition unit 300 (refer to Figure 3 ) when a fire occurs on one side, the heat generated by the fire may be conducted along the partition head part 3220 and move to the partition unit 300 (refer to Figure 3 ) on the other side.

[0096] Figure 5 Yes Figure 1 A cross-sectional view of the partition unit cut along line AA shows a first partition insulation module and a second partition insulation module separated from each other. Figure 6 It is shown in detail Figure 5 Figure 2 shows a first partition insulation module and a second partition insulation module.

[0097] Reference Figure 5 and Figure 6 , the partition insulation module 320 may include a first partition insulation module 320a and a second partition insulation module 320b. The first partition insulation module 320a and the second partition insulation module 320b may be separated from each other. The first partition insulation module 320a and the second partition insulation module 320b may face each other. The partition support module 310 may be located between the first partition insulation module 320a and the second partition insulation module 320b.

[0098] The first partition insulation module 320a and the second partition insulation module 320b may each include a partition leg member (3211, 3212, 3213). The partition leg member (3211, 3212, 3213) may include a first partition leg plate 3211, a second partition leg plate 3212 and a third partition leg plate 3213.

[0099] The first baffle insulation module 320a and the second baffle insulation module 320b may each include a baffle head component (3221, 3222, 3223). The baffle head component (3221, 3222, 3223) may include a first baffle head plate 3221, a second baffle head plate 3222 and a third baffle head plate 3223.

[0100] The first partition head plate 3221 may be formed in a shape bent and extended from the upper end of the first partition leg plate 3211. The second partition head plate 3222 may be formed in a shape bent and extended from the upper end of the second partition leg plate 3212. The third partition head plate 3223 may connect an end of the first partition head plate 3221 and an end of the second partition head plate 3222.

[0101] The third partition head plate 3223 of the first partition insulation module 320a may be spaced apart from and face the third partition head plate 3223 of the second partition insulation module 320b. When a fire occurs in a battery cell adjacent to the first partition head plate 3220a, heat conducted along the first partition insulation module 320a is difficult to transfer to the second partition insulation module 320b.

[0102] However, the radiation heat generated by the third baffle head plate 3223 of the first baffle insulation module 320a may be transferred to the third baffle head plate 3223 of the second baffle insulation module 320b. In other words, heat may be transferred from the third baffle head plate 3223 of the first baffle insulation module 320a to the third baffle head plate 3223 of the second baffle insulation module 320b by radiation.

[0103] Figure 7 Yes Figure 1 A cross-sectional view of the partition unit cut along line AA shows a state in which a heat insulating member is arranged between the first partition insulation module and the second partition insulation module.

[0104] Reference Figure 6 and Figure 7 , the partition unit 300 may include a heat insulating member 330. The heat insulating member 330 may be disposed between the first partition heat insulating module 320a and the second partition heat insulating module 320b.

[0105] The heat insulating member 330 may be made of a material including a substance with relatively low thermal conductivity. For example, the heat insulating member 330 may be made of a material including a polymer substance. For example, the heat insulating member 330 may include polypropylene (PP) or / and glass wool.

[0106] The heat insulating member 330 may prevent the radiation heat generated by the third baffle head plate 3223 of the first baffle heat insulating module 320 a from being transferred to the third baffle head plate 3223 of the second baffle heat insulating module 320 b .

[0107] Figure 8 Yes Figure 1 A cross-sectional view of the partition unit cut along line AA shows a state where a partition insulation module is arranged between the first partition support module and the second partition support module.

[0108] Reference Figure 8 , a plurality of partition support modules 310 may be provided. For example, the partition support module 310 may include a first partition support module 310a and a second partition support module 310b.

[0109] The first partition support module 310a and the second partition support module 310b may be arranged in a horizontal direction. The first partition support module 310a and the second partition support module 310b may be spaced apart from each other. The first partition support module 310a and the second partition support module 310b may be coupled or fixed to the upper surface of the bottom housing 100.

[0110] The partition insulation module 320 may be disposed between the first partition support module 310a and the second partition support module 310b. The partition insulation module 320 may be coupled or fixed to the upper surface of the bottom case 100.

[0111] A hollow portion may be formed inside the partition insulation module 320. For example, the partition insulation module 320 may include a partition insulation space 325 formed inside. When a fire occurs in a battery cell adjacent to the first partition support module 310a, the partition insulation space 325 may suppress heat from moving to the second partition support module 310b.

[0112] Fig. 9 Yes Figure 1 A cross-sectional view of the battery pack casing cut along line B1-B2. Fig.10 It is shown in detail Fig. 9 Diagram of the side insulation module shown.

[0113] Reference Fig. 9 and Fig.10, the side housing 200 may include a side support module 210 and a side heat insulation module 220. The side support module 210 may be formed in a shape extending upward from the end of the bottom housing 100. The side support module 210 may form the rigidity of the side housing 200. The side support module 210 may form the outer side surface of the side housing 200.

[0114] The side insulation module 220 may face the side support module 210. The side insulation module 220 may be connected or coupled to the side support module 210. The side insulation module 220 may face the inner side of the side support module 210. The inner side of the side support module 210 may face the accommodation space 15 (refer to Figure 1 ).

[0115] The side insulation module 220 may face the upper surface of the side support module 210. A side insulation space 225 as a hollow portion may be formed inside the side insulation module 220. The side insulation module 220 may face the battery module 30 (see Fig.14 ) or battery cell 36 (refer to Fig.15 ).

[0116] The side insulation module 220 may include a side leg portion 2210. The side leg portion 2210 may include a first side leg portion plate 2211. The first side leg portion plate 2211 may face an inner side surface of the side support module 210.

[0117] The side leg 2210 may include a second side leg plate 2212. The second side leg plate 2212 may be located at an opposite side of the first side leg plate 2211. The first side leg plate 2211 may be located between the second side leg plate 2212 and the side support module 210.

[0118] The side leg 2210 may include a third side leg plate 2213. The third side leg plate 2213 may connect the first side leg 2211 and the second side leg 2212. For example, the third side leg plate 2213 may extend from a lower end portion of the first side leg 2211 and be connected to a lower end portion of the second side leg 2212. The third side leg plate 2213 may face the bottom case 100.

[0119] The side insulation module 220 may include a side head portion 2220. The side head portion 2220 may face the upper surface of the side support module 210. The side head portion 2220 may be formed in a shape bent and extended from the upper end of the side leg portion 2210.

[0120] The side head portion 2220 may include a first side head portion plate 2221. The first side head portion plate 2221 may be formed in a shape bent and extended from an upper end portion of the first side leg portion plate 2211. The first side head portion plate 2221 may face the side support module 210.

[0121] The temporal head portion 2220 may include a second temporal head portion plate 2222. The second temporal head portion plate 2222 may be formed in a shape bent and extended from an upper end portion of the second leg portion plate 2212. The second temporal head portion plate 2222 may form an upper surface of the temporal head portion 2220.

[0122] The temporal head portion 2220 may include a third temporal head portion plate 2223. The third temporal head portion plate 2223 may connect the first temporal head portion plate 2221 and the second temporal head portion plate 2222. For example, the third temporal head portion plate 2223 may extend from an end of the first temporal head portion plate 2221 and be connected to the second temporal head portion plate 2222. The third temporal head portion plate 2223 may form an outer side surface of the temporal head portion 2220.

[0123] For example, when the battery pack housing 10 (refer to Figure 1 ) is installed in the lower part of the vehicle, if the flame spreads to the outside of the side housing 200, there is a risk of the fire spreading to the entire vehicle. Figure 1 ) When a fire occurs in the battery modules or cells housed therein, the side heat insulation module 220 can suppress the transfer of heat to the outside.

[0124] Fig.11 Yes Figure 1 A cross-sectional view of the partition unit cut along line AA shows a state in which a fire extinguishing component is formed on the partition leg component. Fig.12 It is shown in detail Fig.11 Refer to the diagram of the "C" section. Fig.11 and Fig.12 , partition unit 300 (refer to Figure 1 ) may include a fire extinguishing component 3230. For example, the partition insulation module 320 may include a fire extinguishing component 3230.

[0125] For example, the fire extinguishing component 3230 may be coupled to or located on the partition leg component 3210. For example, the fire extinguishing component 3230 may be coupled to or located on the partition head component (3221, 3222).

[0126] As another example, the side insulation module 220 (see Fig.10 ) may include a fire extinguishing component 3230. For example, the fire extinguishing component 3230 may be coupled to the side leg portion 2210, or may be located on the side leg portion 2210. For example, the fire extinguishing component 3230 may be coupled to the side head portion 2220, or may be located on the side head portion 2220.

[0127] The fire extinguishing component 3230 may include a fire extinguishing agent 3231. The fire extinguishing agent 3231 may be used to extinguish a fire when a fire occurs. The fire extinguishing agent 3231 may be in at least one of a liquid state, a solid state, a gas state, or a powder state.

[0128] The fire extinguishing agent 3231 may be located in the partition insulation space 325. For example, the fire extinguishing agent 3231 may be disposed in the insulation space 325 of the partition leg member 3210.

[0129] The fire extinguishing part 3230 may include a spraying part 3232. The spraying part 3232 may connect the inside and the outside of the partition insulation module 320. For example, the spraying part 3232 may be combined or formed at the partition leg part 3210. For example, the spraying part 3232 may be combined or formed at the second partition leg plate 3212.

[0130] The injection portion 3232 may include an injection portion body 32321. The injection portion body 32321 may be coupled to the second separator leg plate 3212. The injection portion body 32321 may be formed in a shape extending from the second separator leg plate 3212.

[0131] The injection portion body 32321 may be formed in a shape protruding from the second partition leg plate 3212 toward the partition insulation space 325. One end of the injection portion body 32321 may be connected or coupled to the second partition leg plate 3212.

[0132] The injection part 3232 may include an injection part valve 32322. The injection part valve 32322 may be formed in a shape extending from the other end of the injection part body 32321. The injection part valve 32322 may have elasticity.

[0133] When the pressure of the partition insulation space 325 is less than the first pressure, the injection part valve 32322 may remain closed. When the pressure of the partition insulation space 325 is greater than or equal to the first pressure, the injection part valve 32322 may remain open. The first pressure may be a pressure greater than 1 atmosphere (atm).

[0134] When the battery module 30 adjacent to the partition insulation module 320 (refer to Fig.14 ) or battery cell 36 (refer to Fig.15 ) When a fire occurs, the partition insulation module 320 can receive heat.

[0135] When the partition insulation module 320 receives heat, the pressure of the partition insulation space 325 of the partition insulation module 320 increases. For example, when the partition insulation module 320 receives heat, at least a portion of the fire extinguishing agent 3231 in the partition insulation space 325 is vaporized, so that the pressure of the insulation space 325 is further increased.

[0136] When the pressure of the partition insulation space 325 is greater than the first pressure, the injection valve 32322 is opened, and the fire extinguishing agent 3231 in the partition insulation space 325 can be discharged to the outside of the partition insulation module 320. The fire extinguishing agent 3231 discharged to the outside of the partition insulation module 320 can act on the battery module 30 (refer to Fig.14 ) or battery cell 36 (refer to Fig.15 ) to extinguish the fire.

[0137] The injection portion 3232 may be formed without an additional structure on the partition leg member 3210. For example, the injection portion 3232 may refer to a portion of the second partition leg plate 3212 with a relatively thin thickness.

[0138] For example, the partition leg part 3210 may be made of metal, and when the partition leg part 3210 is heated, a portion of the partition leg part 3210 may be melted by the heat.

[0139] Since the injection part 3232 is a relatively thin portion of the second partition leg plate 3212, it melts due to heat. When the injection part 3232 melts due to heat, the second partition leg plate 3212 forms an opening, and the fire extinguishing agent 3231 can be sprayed out through the opening.

[0140] Fig.13 It is cutting Figure 1 sectional view of a battery pack housing showing a state in which a portion of the bottom housing is integrally formed with the partition support module.

[0141] Reference Fig.13 , the bottom case 100 may include an upper bottom case 110 and a lower bottom case 120 . The upper bottom case 110 may form an upper surface of the bottom case 100 .

[0142] The upper bottom housing 110 may be integrally formed with the diaphragm support module 310. For example, by performing a press process on the metal plate 20, the diaphragm support module 310 and the upper bottom housing 110 may be integrally formed.

[0143] Partition unit 300 (refer to Figure 2 ) can be formed integrally with the upper bottom shell 110. For example, the first partition unit 301 (refer to Figure 1 ) can be formed integrally with the upper bottom shell 110. For example, the second partition unit 302 (refer to Figure 2 )'s partition support module 310 may be integrally formed with the upper bottom shell 110 .

[0144] Thus, it is possible to improve the coupling force between the partition support module 310 and the bottom case 100. In addition, the process of manufacturing the partition support module 310 and fixing it to the bottom case 100 can also be simplified.

[0145] The partition support module 310 may be formed in a shape protruding upward from the upper bottom case 110. For example, the partition support module 310 may be formed in a shape bent and extended upward from the upper bottom case 110. The partition support module 310 may be formed in a shape recessed toward the lower bottom case 120.

[0146] The lower bottom case 120 may be coupled to a lower surface of the upper bottom case 110. For example, the lower bottom case 120 and the upper bottom case 110 may be coupled or fixed to each other by welding.

[0147] A bottom hollow portion 150 may be formed between the lower bottom case 120 and the diaphragm supporting module 310. The bottom hollow portion 150 may be formed by the diaphragm supporting module 310 and the lower bottom case 120.

[0148] When the battery module 30 on one side of the partition support module 310 (refer to Fig.14 ) or battery cell 36 (refer to Fig.15 ) When a fire occurs, the bottom hollow portion 150 can prevent the heat generated by the fire from moving to the other side of the partition support module 310.

[0149] The diaphragm support module 310 may be integrally formed with at least a portion of the bottom case 100. For example, the bottom case 100 may be divided into an upper layer and a lower layer, and the diaphragm support module 310 may be integrally formed with the upper layer of the bottom case 100.

[0150] For example, the diaphragm support module 310 and the upper layer of the bottom housing 100 may be integrally formed by punching the metal plate 20. In other words, the diaphragm support module 310 and the upper bottom housing 110 may be integrally formed.

[0151] In this case, an empty space may be formed between the lower layer of the bottom case 100 and the diaphragm supporting module 310. In other words, a bottom hollow portion 150 may be formed between the lower bottom case 120 and the diaphragm supporting module 310.

[0152] Fig.14 is a diagram showing a battery module according to one embodiment of the present invention. Fig.15 is a diagram showing a battery cell group according to one embodiment of the present invention.

[0153] Reference Fig.14 and Fig.15, the battery module 30 may include a battery cell group 35. The battery cell group 35 may include a plurality of battery cells 36. The plurality of battery cells 36 may be stacked. The battery cell group 35 may be accommodated in a module housing. The battery module 30 may include a battery cell group 35 and a module housing.

[0154] The battery cell 36 may include a battery cell body 37. The battery cell body 37 may be formed in a shape extending from one end to the other end. The battery cell body 37 may include an electrode assembly. The electrode assembly may include a positive electrode, a negative electrode, and a separator.

[0155] The battery cell 36 may include an electrode lead 38. A plurality of electrode leads 38 may be located at one end and the other end of the battery cell body 37. One end and the other end of the battery cell body 37 may correspond to one end and the other end of the battery cell group 35.

[0156] Fig.16 2 is a diagram showing a state where a battery module is housed in a battery pack case. Fig.16 The battery pack 1 may include a battery pack housing 10 and a battery module 30. The battery pack housing 10 may accommodate at least one battery module 30. Fig.16 Although not shown, a plurality of battery modules 30 may be electrically connected.

[0157] Fig.17 2 is a diagram showing a state where a battery cell group is accommodated in a battery pack case. Fig.17 The battery pack 1 may include a battery pack housing 10 and a battery cell group 35. The battery pack housing 10 may accommodate at least one battery cell group 35. Fig.17 Not shown, but multiple cells 36 (refer to Fig.15 ) can be electrically connected, and multiple battery cell groups 35 can be electrically connected.

[0158] Reference Fig.16 and Fig.17 , the battery module 30 or a plurality of battery cell groups 35 can be accommodated in the battery pack housing 10 to provide power to an electric vehicle or the like. As described above, when a fire occurs in the battery module 30 or the battery cell group 35, the battery pack housing 10 can effectively suppress the spread of the fire. Therefore, the battery pack 1 according to one embodiment of the present invention can operate more stably.

[0159] The above-mentioned one embodiment or another embodiment of the present invention is not mutually exclusive or distinguishable. The structures or functions of the above-mentioned one embodiment or another embodiment of the present invention can be used in parallel or combined.

[0160] It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. The above detailed description should not be regarded as restrictive in all aspects, but should be regarded as exemplary. The scope of the present invention should be determined by the reasonable interpretation of the claims, and all changes within the equivalent scope of the present invention should be included in the scope of the present invention.

Claims

1. A battery pack housing, comprising: Base plate; A side housing extending upward from the periphery of the bottom plate and forming a receiving space together with the bottom plate; as well as a partition unit, located on the upper surface of the bottom plate, for dividing the accommodation space, The partition unit comprises: a bulkhead support module coupled to the base plate; as well as A partition insulation module is coupled to the partition support module, and a heat insulation space as a hollow portion is formed inside the partition insulation module.

2. The battery pack housing according to claim 1, wherein: The partition insulation module includes a partition leg member, and the partition leg member is located in the accommodation space and faces the partition support module.

3. The battery pack housing according to claim 2, wherein: The partition leg member comprises: a first bulkhead leg plate facing the bulkhead support module; and The second partition leg plate is located on an opposite side of the first partition leg plate and is spaced apart from the first partition leg plate.

4. The battery pack housing according to claim 3, wherein: The diaphragm leg member further includes a third diaphragm leg plate extending from a lower end portion of the first diaphragm leg plate to a lower end portion of the second diaphragm leg plate.

5. The battery pack housing according to claim 2, wherein: The partition insulation module further includes a partition head member, which is bent and extended from the partition leg member and is located above the partition support module.

6. The battery pack housing according to claim 2, wherein: The partition leg component includes a first partition leg component and a second partition leg component, and the first partition leg component and the second partition leg component are respectively located on two side surfaces of the partition support module.

7. The battery pack housing according to claim 6, wherein: The partition heat insulation module includes a partition head component, which faces the upper surface of the partition support module and connects the first partition leg component and the second partition leg component.

8. The battery pack housing according to claim 1, wherein: The partition insulation module includes a first partition insulation module and a second partition insulation module, wherein the first partition insulation module and the second partition insulation module are respectively arranged on two sides of the partition support module and are separated from each other. The first baffle insulation module and the second baffle insulation module each include: a partition leg member located in the accommodation space and facing the partition support module; and The partition head part is bent and extended from the partition leg part and faces the upper surface of the partition supporting module.

9. The battery pack casing according to claim 8, wherein: The partition leg member comprises: a first bulkhead leg plate facing the bulkhead support module; and a second bulkhead leg plate located on an opposite side of the first bulkhead leg plate and spaced apart from the first bulkhead leg plate, The partition head component comprises: a first bulkhead plate, bent and extended from the first bulkhead leg plate, and facing an upper surface of the bulkhead support module; a second baffle head plate bent and extended from the second baffle leg plate and forming an upper surface of the baffle head member; and The third baffle header plate extends from an end of the first baffle header plate to an end of the second baffle header plate.

10. The battery pack housing according to claim 9, wherein: The third bulkhead panel of the first bulkhead insulation module is spaced apart from and faces the third bulkhead panel of the second bulkhead insulation module.

11. The battery pack housing according to claim 10, further comprising: The heat insulating member is arranged on the upper surface of the partition support module and is located between the first partition heat insulating module and the second partition heat insulating module.

12. The battery pack housing according to claim 1, wherein: The partition support module includes a first partition support module and a second partition support module, the first partition support module and the second partition support module are arranged in a horizontal direction and are spaced apart from each other. The partition heat insulation module is disposed between the first partition support module and the second partition support module.

13. The battery pack housing according to claim 1, wherein: The side housing comprises: a side support module having a shape extending upward from an edge of the bottom plate; and The side heat insulation module is coupled to the support module, and a side heat insulation space as a hollow portion is formed inside the side heat insulation module.

14. The battery pack housing according to claim 13, wherein: The side heat insulation module includes a side leg part, and the side leg part is located in the accommodation space and faces the side support module.

15. The battery pack housing according to claim 14, wherein: The side heat insulation module further includes a side head part bent and extended from the side leg part and located above the side support module.

16. The battery pack housing according to claim 1, wherein: The partition unit further includes a fire extinguishing component, which is coupled to the partition insulation module and communicates with the insulation space, and sprays a fire extinguishing agent toward the accommodation space when a pressure inside the insulation space is greater than or equal to a predetermined pressure.

17. The battery pack housing according to claim 16, wherein: The fire extinguishing components include: An injection portion, combined or formed on the partition insulation module and communicated with the accommodation space; and The fire extinguishing agent is located in the heat-insulating space, When the pressure inside the heat-insulating space is lower than the predetermined pressure, the injection portion is closed, and when the pressure inside the heat-insulating space is higher than or equal to the predetermined pressure, the injection portion is opened.

18. A battery pack comprising: A plurality of battery cell groups, each of the plurality of battery cell groups comprising a plurality of battery cells; as well as a battery pack housing, accommodating the plurality of battery packs, The battery pack housing comprises: Base plate; a side housing extending upward from the periphery of the bottom plate and forming a receiving space together with the bottom plate; and a partition unit, located on the upper surface of the bottom plate, for dividing the accommodation space, The partition unit comprises: a bulkhead support module coupled to the base plate; and A partition insulation module is coupled to the partition support module, and a heat insulation space as a hollow portion is formed inside the partition insulation module.

19. The battery pack according to claim 18, wherein: The plurality of battery cell groups are respectively accommodated in module housings to form a battery module. The battery module is accommodated in the battery pack case.

20. The battery pack according to claim 18, wherein: The pressure of the thermal insulation space is less than 1 atmosphere.

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