Cell stack assembly and battery pack comprising same

Abstract

The invention relates to a cell stack assembly and a battery pack comprising the same. The cell stack assembly according to the present invention comprises: a cell stack formed from a plurality of stacked battery cells, the plurality of battery cells having electrode leads protruding from one or both sides thereof; and a separation member in contact with one side of at least any one of the battery cells of the cell stack, in which the separation member includes a hollow portion therein and a protrusion on each of both side surfaces thereof.

Description

Technical Field

[0001] The present disclosure relates to a cell stack assembly and a battery pack including the cell stack assembly. The cell stack assembly of the present disclosure includes a separation member, which includes a hollow interior and protrusions on both sides. The battery pack including the cell stack assembly of the present disclosure is also characterized in that the separation member applied to each cell stack assembly hinders the movement of heat in various forms.

[0002] This application claims the priority of Korean Patent Application No. 10-2023-0016354 filed in Korea on February 7, 2023, and all contents disclosed in the Korean patent application document are included as part of this specification. Background Art

[0003] The types of secondary batteries widely used at present include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, etc. The operating voltage of such a unit secondary battery cell (in other words, a unit battery cell) is about 2.5V to 4.5V. Therefore, if a higher output voltage than this is required, a plurality of such battery cells can be connected in series to form a battery pack. In addition, depending on the required charge and discharge capacity of the battery pack, a battery pack can also be constructed by connecting a plurality of battery cells in parallel. Therefore, the number of battery cells included in the battery pack can vary depending on the required output voltage or charge and discharge capacity.

[0004] When constructing a battery pack by connecting a plurality of battery cells in series / parallel, a battery module including at least one battery cell is generally constructed first, and the battery pack is constructed by adding other components using at least one such battery module.

[0005] A conventional battery module generally includes at least one cell stack including battery cells and a casing structure (in other words, a module frame, etc.) in the form of a box made of a metal material for accommodating such at least one cell stack.

[0006] In addition, in order to solve the problem that the energy density of the entire battery pack is reduced due to the weight or volume of the module frame itself, while the weight of the entire battery pack is increased, people have begun to use cell stack assemblies that do not include module frames that wrap around and protect the cell stack as a substitute for traditional battery modules.

[0007] Figure 1 is a perspective view of a conventional battery cell stack assembly 60 that does not include a module frame. Figure 1, a plurality of battery cells 10 are stacked in a row to form a cell stack 20, and coupled to the front and rear surfaces of the cell stack 20 is a busbar frame 30, which includes busbars connected to the electrode leads of each cell. An end plate 40 is also shown in the figure. It is coupled to the busbar frame 30 to protect the electrode leads and the busbars.

[0008] Figure 2 Provides support and protection Figure 1 The support beam 50 of the battery cell stack 20 in the battery cell stack assembly 60. Figure 2 The support beams 50 are configured to support each battery cell stack 20 at both sides of the battery cell stack 20 while protecting it from external impact.

[0009] Figure 3 The battery pack case 70 included in the conventional battery pack is shown, and the battery pack case 70 is accommodated in the battery pack case 70. Figure 2 A battery cell stack assembly 60.

[0010] When the cell stack assembly 60 including the support beam 50 is accommodated in the Figure 3 When the battery pack casing 70 is of the same structure as shown, the support beam 50 can be fully used to separate and protect a pair of adjacent battery cell stacks 20 .

[0011] However, the support beams 50 of each cell stack assembly 60 have good heat transfer with the support beams 50 of other adjacent cell stack assemblies 60 , so that if thermal runaway occurs in one cell stack 20 , it is impossible to prevent high-temperature heat from being transferred to other cell stacks 20 .

[0012] In addition, because each battery cell included in the battery cell stack assembly 60 is stacked in contact with each other under pressure to form a single battery cell stack 20, if any battery cell in the battery cell stack assembly 60 experiences thermal runaway, it is impossible to prevent high-temperature heat from being transferred to other battery cells.

[0013] [Prior art literature]

[0014] Korean Patent Publication No. 10-2022-0014027 Summary of the invention

[0015] Technical issues

[0016] Therefore, an object of the present disclosure is to provide a cell stack assembly having a moving structure capable of suppressing various forms of heat, and a battery pack including the cell stack assembly.

[0017] Further, an object of the present disclosure is to provide a cell stack assembly that achieves weight reduction while applying a separation member that suppresses movement of heat, and a battery pack including the cell stack assembly.

[0018] Other objects and advantages of the present disclosure will be understood from the following description, which will become more apparent from the embodiments of the present disclosure, and it will be easily understood that the objects and advantages of the present disclosure can be achieved by the means disclosed in the claims of the patent and their combinations.

[0019] Technical Solution

[0020] According to the present disclosure, a battery cell stack assembly is provided, which includes: a battery cell stack having a plurality of stacked battery cells, the plurality of battery cells having electrode leads extending from one side or both sides; and a separation member configured to contact one side of at least one battery cell of the battery cell stack, wherein the separation member includes a hollow portion inside and a protruding portion on each of two side surfaces.

[0021] At least one of an outer surface and an inner surface of the separation member may be coated with a metal thin film.

[0022] The protruding portion may include any one of a dot pattern, a stripe pattern, a grid pattern, and a honeycomb pattern.

[0023] The separation member may include first and second supporting portions respectively connecting tops and bottoms of two side surfaces including the protruding portion, wherein thicknesses of the first and second supporting portions may increase toward edges.

[0024] The separation member may include any one of glass and stainless steel.

[0025] The separation members may be attached to both side surfaces of the battery cell stack, respectively.

[0026] According to the present disclosure, a battery pack is provided, which includes: a battery pack shell that accommodates the above-mentioned battery cell stack assembly, wherein the battery pack shell includes: a bottom plate that supports the lower part of the battery cell stack assembly; and a side wall that is connected to the edge of the bottom plate to support the side of the battery cell stack assembly.

[0027] At least one of an outer surface and an inner surface of the separation member may be coated with a metal thin film.

[0028] The protruding portion may include any one of a dot pattern, a stripe pattern, a grid pattern, and a honeycomb pattern.

[0029] The separation member may include first and second supporting portions respectively connecting tops and bottoms of both side surfaces including the protruding portion, wherein thicknesses of the first and second supporting portions may increase toward the edge.

[0030] The separation member may include any one of glass and stainless steel.

[0031] At least one of an outer surface and an inner surface of the separation member may be coated with a metal thin film.

[0032] The separation member may be attached to each of both sides of the battery cell stack.

[0033] The battery pack housing may further include a separation wall coupled to the bottom plate, wherein the separation wall is interposed between the battery cell stack assemblies so that any pair of adjacently arranged battery cell stack assemblies are separated.

[0034] Beneficial Effects

[0035] According to the present disclosure, the thermal safety of the battery cell stack assembly and the battery pack can be improved.

[0036] Furthermore, according to the present disclosure, the cell stack assembly and the battery pack can be lightweight, thereby improving energy density. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A conventional battery cell stack assembly is shown.

[0038] Figure 2 A conventional battery cell stack assembly provided with support beams is shown.

[0039] Figure 3 A conventional battery pack is shown.

[0040] Figure 4 is a perspective view of a battery cell stack assembly according to a first embodiment of the present disclosure.

[0041] Figure 5 Another embodiment of a cell stack assembly is shown that employs a module frame wrapped around the cell stack.

[0042] Figure 6 is a perspective view of a separation member included in a battery cell stack assembly according to a first embodiment of the present disclosure.

[0043] Figure 7 yes Figure 6 Longitudinal perspective view.

[0044] Figure 8 yes Figure 6 Cross-sectional perspective view.

[0045] Fig. 9 They are Figure 7 Magnified view of the top and bottom of the separated components in .

[0046] Fig.10 The transfer of heat through a separation member coated with a metal film on the outer surface is shown.

[0047] Fig.11 The transfer of heat through a separation member having a metal film coated on the inner surface is shown.

[0048] Fig.12 is a perspective view of a battery pack case included in a battery pack in which a cell stack assembly according to a first embodiment of the present disclosure is accommodated.

[0049] Fig.13 is a longitudinal perspective view of a separation member included in a battery cell stack assembly according to a second embodiment of the present disclosure.

[0050] Fig.14 is a cross-sectional perspective view of a separation member included in a battery cell stack assembly according to a second embodiment of the present disclosure.

[0051] Fig.15 They are Fig.13 Magnified view of the top and bottom of the separated components in .

[0052] Fig.16 is a perspective view of a battery cell stack assembly according to a third embodiment of the present disclosure.

[0053] Fig.17 is a perspective view of a battery pack case included in a battery pack in which a cell stack assembly according to a third embodiment of the present disclosure is accommodated.

[0054] Fig.18 is a perspective view of a separation member included in a battery cell stack assembly according to a fourth embodiment of the present disclosure.

[0055] Fig.19 is a perspective view of a separation member included in a battery cell stack assembly according to a fifth embodiment of the present disclosure.

[0056] Fig. 20 is a perspective view of a separation member included in a battery cell stack assembly according to a sixth embodiment of the present disclosure.

[0057] Fig.21 is a perspective view of a separation member included in a battery cell stack assembly according to a seventh embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] The present disclosure will be described in detail below in conjunction with the accompanying drawings, which illustrate preferred embodiments of the present disclosure. It should be understood that the terms and words used in the present specification and claims should not be interpreted according to their conventional or dictionary meanings, but should be interpreted according to the meanings and concepts consistent with the technical ideas of the present disclosure based on the principle that the inventor can define the concepts of terms as he or she deems most suitable to describe the present disclosure.

[0059] However, it should be understood that the present disclosure is not limited to the specific embodiments, but includes all modifications, equivalents or substitutes within the spirit and technical scope of the present disclosure.

[0060] Furthermore, in describing the present disclosure, if it is considered that detailed descriptions of related disclosed configurations or functions may obscure the subject matter of the present disclosure, such descriptions will be omitted.

[0061] The present disclosure is shown in the embodiments in order to explain the present disclosure more comprehensively to those of ordinary skill in the art. Therefore, for the sake of clarity, the shapes and sizes of the components in the drawings may be exaggerated, omitted or schematically shown. Accordingly, the size or ratio of each component does not necessarily represent its actual size or ratio.

[0062] The present disclosure relates to a cell stack assembly 100 and a battery pack including the cell stack assembly. The cell stack assembly 100 of the present disclosure includes a separation member 140, which includes a hollow interior and includes a protrusion 141 on each of two side surfaces. The battery pack including the cell stack assembly 100 of the present disclosure is also characterized in that the movement of various forms of heat H is hindered by the separation member 140 applied to each cell stack assembly 100.

[0063] Figures 4 to 12 The present invention relates to a battery cell stack assembly 100 and a battery pack including the battery cell stack assembly according to a first embodiment of the present invention. Figures 13 to 15 Involving a battery cell stack assembly 100 according to a second embodiment of the present disclosure, Figure 16 to Figure 17 A cell stack assembly 100 and a battery pack including the cell stack assembly according to a third embodiment of the present disclosure are provided. Figures 18 to 21 They respectively relate to the battery cell stack assemblies 100 according to the fourth to seventh embodiments of the present disclosure.

[0064] Hereinafter, a cell stack assembly 100 and a battery pack according to various embodiments of the present disclosure will be described with reference to each of these drawings.

[0065] (First Embodiment)

[0066] Battery cell stack assembly 100

[0067] Figure 4 is a perspective view of a battery cell stack assembly 100 according to a first embodiment of the present disclosure.

[0068] The cell stack assembly 100 includes a cell stack 110 and a separation member 140. More specifically, the cell stack assembly 100 includes: a cell stack 110, wherein the cell stack 110 has a plurality of battery cells 111 stacked in one direction, and the battery cells 111 have electrode leads (not shown in the figure) extending from one side or both sides, such as Figure 4as shown; and a bus bar 121 electrically connected to each electrode lead of the battery cell stack 110; a bus bar frame 120 connected to each front and rear surface of the battery cell stack 110; an end plate 130 connected to the bus bar frame 120 to cover the bus bar 121; and a separation member 140 configured to contact one side of at least one battery cell 111 in the battery cell stack 110.

[0069] The battery cell stack assembly 100 of the present disclosure may be as follows: Figure 4 The illustrated structure is one in which the internal battery cell 111 and the separation member 140 are exposed to the outside, but it may also be a structure in which the battery cell 111 and the separation member 140 are sealed and not exposed to the outside.

[0070] Figure 5 A cell stack assembly 100 according to another embodiment of the present disclosure is shown, which employs a module frame 150 surrounding a cell stack 110 .

[0071] The module frame 150 is wrapped around and covers the circumference of the cell stack 110 , and each of the cell 111 is protected from the outside by being coupled with the module frame 150 or the end plate 130 .

[0072] like Figure 4 As shown, the separation member 140 is interposed between any pair of battery cells 111 among the plurality of battery cells 111 included in the battery cell stack 110 .

[0073] The separation member 140 interposed between the battery cells 111 as described above serves to block the movement of heat H between the battery cells by separating between the battery cells 111. In other words, when one of the battery cells 111 undergoes thermal runaway and releases high-temperature heat H, the separation member 140 serves to prevent the heat H from being transferred to other adjacent battery cells 111.

[0074] Figure 6 is a perspective view of a separation member 140 included in the battery cell stack assembly 100 according to the first embodiment of the present disclosure.

[0075] The separation member 140 may be glass with low thermal conductivity or stainless steel, but any material may be used as long as it is safe for the high temperature heat H.

[0076] The separation member 140 of the present disclosure is characterized in that it effectively blocks the movement of heat H through various means including conduction, convection, and radiation.

[0077] like Figure 6 As shown, the separation member 140 includes protruding portions 141 protruding in a specific pattern at both sides.

[0078] The protruding portion 141 has an effect of reducing the contact area with the battery cell 111 , thereby reducing the path for the heat H to be transferred from the battery cell 111 to the separation member 140 .

[0079] Since the protrusion 141 has a stable pattern form, the separation member 140 also improves structural stability.

[0080] Figure 7 and Figure 8 yes Figure 6 140 is a cross-sectional perspective view of the separation member 140. Specifically, Figure 7 is along Figure 6 The cross-sectional view of AA" Figure 8 is along Figure 6 Cross-sectional view of BB".

[0081] like Figure 7 and Figure 8 As shown, the separation member 140 is a hollow structure. In other words, the separation member 140 includes a hollow portion 142 therein.

[0082] The hollow portion 142 of the separation member 140 maintains a vacuum state.

[0083] Due to the hollow portion 142 and the vacuum structure of the hollow portion 142 , the separation member 140 effectively blocks the movement of the heat H inside the separation member 140 in the form of conduction and convection.

[0084] The separation member 140 includes first and second supporting portions 140a and 140b respectively connecting tops and bottoms of two side surfaces including the protruding portion 141, and third and fourth supporting portions respectively connecting sides of the two side surfaces.

[0085] Fig. 9 The above Figure 7 The top of the separation member 140 ( Fig. 9 (a)) and bottom ( Fig. 9 (b) is an enlarged view of .

[0086] like Fig. 9 As shown, the heat H transferred to one side of the separation member 140 moves to the other side in the form of conduction through the first support portion 140a corresponding to the top of the separation member 140 and the second support portion 140b corresponding to the bottom thereof. Although not shown, the third support portion and the fourth support portion also become the only conduction path for the movement of the heat H, just like the first support portion 140a and the second support portion 140b.

[0087] The outer surface of the separation member 140 may be coated with a metal film capable of reflecting the radiant heat H. In other words, the metal film reflects the heat H moving in the form of radiation so that only a portion of the heat H is transferred to the separation member 140 .

[0088] Fig.10 The transfer of heat (H) through a separation member 140 coated with a metal film on its outer surface is schematically illustrated.

[0089] according to Fig.10 It can be seen that the heat H moving toward the separation member 140 in the form of radiation is partially reflected from the surface of the separation member 140 and partially absorbed by the separation member 140.

[0090] The metal film may be coated not only on the outer surface of the separation member 140 but also on the inner surface where the hollow portion 142 is located.

[0091] Fig.11 The transfer of heat (H) through a separation member (140) having a metal film coated on its inner surface is schematically shown.

[0092] according to Fig.11 , it can be seen that the heat H moving toward the separation member 140 in the form of radiation is absorbed by the surface of the separation member 140, and the heat H radiated through the hollow portion 142 is partially reflected by the metal film coated on the inner surface.

[0093] Battery Pack

[0094] Fig.12 1 is a perspective view of a battery pack case 1000 included in a battery pack in which the battery cell stack assembly 100 according to the first embodiment of the present disclosure is accommodated.

[0095] The battery pack housing 1000 includes a bottom plate 1100 and a side wall 1200. Specifically, Fig.12 As shown, the battery pack housing 1000 includes a bottom plate 1100 supporting the lower portion of the battery cell stack assembly 100 , and a side wall 1200 coupled to an edge of the bottom plate 1100 to support the side portion of the battery cell stack assembly 100 .

[0096] The battery pack case 1000 further includes a plurality of separation walls 1300 coupled to the bottom plate 1100 to provide separation between a pair of adjacent battery cell stack assemblies 100 .

[0097] The purpose of the separation wall 1300 is to provide separation between the individual battery cell stack assemblies 100 and to block the movement of heat.

[0098] Since the battery pack has the separation member 140 applied to each housed cell stack assembly 100 , the battery pack has the effect of delaying the transfer of heat (H) to the entire cell stack assembly 100 in the event that a thermal runaway phenomenon occurs in any one cell stack assembly 100 .

[0099] (Second Embodiment)

[0100] Battery cell stack assembly 100

[0101] Fig.13 and Fig.14 is a cross-sectional perspective view of a separation member 140 included in a battery cell stack assembly 100 according to a second embodiment of the present disclosure.

[0102] In the separation member 140, the thickness of the first support portion 140a, the second support portion 140b, the third support portion and the fourth support portion becomes thicker toward the edge and thinner toward the center; in other words, the thickness of the first support portion to the fourth support portion connecting both sides of the separation member 140 including the protruding portion 141 is thinner than the thickness of the first support portion to the fourth support portion of the separation member 140 of the battery stack assembly 100 according to the first embodiment. Therefore, the movement of the heat H through the first support portion to the fourth support portion can be limited, and in particular, the amount of the heat H moved by conduction can be significantly reduced.

[0103] Fig.15 They are Fig.13 The top of the separation member 140 ( Fig.15 (a)) and bottom ( Fig.15 (b) is an enlarged view of .

[0104] like Fig.15 As shown, the heat H transferred to one side of the separation member 140 moves to the other side in the form of conduction through the first support portion 140a corresponding to the top of the separation member 140 and the second support portion 140b corresponding to the bottom thereof. Although not shown, the third support portion and the fourth support portion also become the only conduction path for the movement of the heat H, just like the first support portion 140a and the second support portion 140b.

[0105] However, if Fig.15 As shown, since the thickness of the first supporting portion 140a and the second supporting portion 140b connecting both sides of the separation member 140 is reduced, the amount of heat H moving is also reduced.

[0106] (Third Embodiment)

[0107] Battery cell stack assembly 100

[0108] Fig.16is a perspective view of a battery cell stack assembly 100 according to a third embodiment of the present disclosure.

[0109] The cell stack assembly 100 includes a cell stack 110 and a separation member 140. More specifically, the cell stack assembly 100 includes: a cell stack 110, wherein the cell stack 110 has a plurality of battery cells 111 stacked in one direction, and the battery cells 111 have electrode leads (not shown in the figure) extending from one side or both sides, such as Fig.16 As shown; a bus bar 121, which is electrically connected to each electrode lead of the cell stack 110; a bus bar frame 120, which is connected to each of the front and rear surfaces of the cell stack 110; an end plate 130, which is connected to the bus bar frame 120 to cover the bus bar 121; and a separation member 140, which is configured to contact the first surface of the outermost cell 111 on each side of the cell stack 110.

[0110] The battery cell stack assembly 100 of the present disclosure may be as follows: Fig.16 The illustrated structure is one in which the internal battery cell 111 and the separation member 140 are exposed to the outside, but it may also be a structure in which the battery cell 111 and the separation member 140 are sealed and not exposed to the outside.

[0111] like Fig.16 As shown, the separation member 140 is configured to contact the outer surfaces of the outermost battery cells 111 at both sides of the battery cell stack 110. At this time, the separation member 140 may be coupled to the bus bar frame 120 and fixed to the bus bar frame 120.

[0112] As described above, the separation member 140 attached to the outermost battery cell 111 of the battery cell stack 110 is used to support both sides of the battery cell stack 110, and is also used to block the heat H inside the battery cell stack 110 from being released to the outside. In other words, when the battery cell stack 110 is overheated and releases high-temperature heat H, the separation member 140 is used to prevent the heat H from being transferred to other adjacent battery cell stacks 110.

[0113] Battery Pack

[0114] Fig.17 2 is a perspective view of a battery pack case 1000 included in a battery pack in which a battery cell stack assembly 100 according to a third embodiment of the present disclosure is accommodated.

[0115] The battery pack housing 1000 includes a bottom plate 1100 and a side wall 1200. Fig.17 As shown, the battery pack case 1000 includes: a bottom plate 1100 that supports the lower portion of the battery cell stack assembly 100 ; and a side wall 1200 that is coupled to an edge of the bottom plate 1100 to support the side of the battery cell stack assembly 100 .

[0116] In the battery pack housing 1000 , each pair of adjacent cell stacks 110 is provided with a separation member 140 on both sides of each cell stack 110 . In other words, there are two separation members 140 between the pair of cell stacks 110 .

[0117] The separation member 140 provides separation at each cell stack 110 and prevents the heat H from being transferred from one cell stack 110 to other adjacent cell stacks 110 .

[0118] Since the battery pack has the separation member 140 applied to each housed cell stack assembly 100 , the battery pack has the effect of delaying the transfer of heat (H) to the entire cell stack assembly 100 in the event that a thermal runaway phenomenon occurs in any one cell stack assembly 100 .

[0119] (Fourth Embodiment)

[0120] Battery cell stack assembly 100

[0121] Fig.18 is a perspective view of a separation member 140 included in a cell stack assembly 100 according to a fourth embodiment of the present disclosure.

[0122] The separation member 140 of the present disclosure may be formed to have a protruding portion 141 having various patterns such as Fig.18 The dot pattern shown.

[0123] (Fifth Embodiment)

[0124] Battery cell stack assembly 100

[0125] Fig.19 is a perspective view of a separation member 140 included in a cell stack assembly 100 according to a fifth embodiment of the present disclosure.

[0126] The separation member 140 of the present disclosure may be formed to have a protruding portion 141 having various patterns such as Fig.19 Grid pattern shown.

[0127] (Sixth Embodiment)

[0128] Battery cell stack assembly 100

[0129] Fig. 20 is a perspective view of a separation member 140 included in a battery cell stack assembly 100 according to a sixth embodiment of the present disclosure.

[0130] The separation member 140 of the present disclosure may be formed to have a protruding portion 141 having various patterns such as Fig. 20In this case, the protrusions 141 are formed to extend in the height direction of the separation member 140 and to be spaced at predetermined intervals in the length direction of the separation member 140 .

[0131] (Seventh Embodiment)

[0132] Battery cell stack assembly 100

[0133] Fig.21 is a perspective view of a separation member 140 included in a cell stack assembly 100 according to a seventh embodiment of the present disclosure.

[0134] The separation member 140 of the present disclosure may be formed to have a protruding portion 141 having various patterns such as Fig.21 In this case, the protrusions 141 are formed to extend in the length direction of the separation member 140 and to be spaced at predetermined intervals in the height direction of the separation member 140 .

[0135] As described above, the present invention is described in more detail through the drawings and embodiments. However, since the configuration described in the drawings or embodiments described herein is only an embodiment of the present invention and does not represent the overall technical concept of the present invention, it should be understood that when this application is submitted, the present invention covers various equivalent solutions, modifications and alternative solutions.

[0136] [Explanation of Reference Numerals]

[0137] 10: (Prior Art) Battery Cell

[0138] 20: (Prior art) battery cell stack

[0139] 30: (Prior Art) Busbar Frame

[0140] 40: (Prior Art) End Plate

[0141] 50: (Prior Art) Support Beam

[0142] 60: (Prior art) battery stack assembly

[0143] 70: (Prior Art) Battery Pack Housing

[0144] 100: Battery cell stack assembly

[0145] 110: Battery cell stack

[0146] 111: Battery Cell

[0147] 120: Busbar frame

[0148] 121: Busbar

[0149] 130: End plate

[0150] 140: Separation of components

[0151] 140a: First supporting portion

[0152] 140b: Second support portion

[0153] 141: Protrusion

[0154] 142: Hollow part

[0155] 150: Module Framework

[0156] 1000: Battery pack housing

[0157] 1100: Base plate

[0158] 1200: Sidewall

[0159] 1300: Separation wall

[0160] H: Heat

Claims

1. A battery cell stack assembly, comprising: A battery cell stack, wherein the battery cell stack has a plurality of stacked battery cells, and the plurality of battery cells have electrode leads extending from one side or both sides; as well as a separation member configured to contact one side of at least one battery cell of the cell stack, The separation member includes a hollow portion inside and a protruding portion on each of two side surfaces.

2. The battery cell stack assembly according to claim 1, wherein: At least one of an outer surface and an inner surface of the separation member is coated with a metal thin film.

3. The battery cell stack assembly according to claim 1, wherein: The protruding portion includes any one of a dot pattern, a stripe pattern, a grid pattern, and a honeycomb pattern.

4. The battery cell stack assembly according to claim 1, wherein: The separation member includes a first supporting portion and a second supporting portion respectively connecting the top and the bottom of two side surfaces including the protruding portion, Wherein, the thickness of the first supporting portion and the second supporting portion increases toward the edge.

5. The battery cell stack assembly according to claim 1, wherein: The separation member includes any one of glass and stainless steel.

6. The battery cell stack assembly according to claim 1, wherein: The separation members are respectively attached to both side surfaces of the battery cell stack.

7. A battery pack, comprising: A battery pack housing for accommodating the battery cell stack assembly according to claim 1, Wherein, the battery pack housing comprises: a bottom plate supporting a lower portion of the battery cell stack assembly; and A side wall is coupled to an edge of the bottom plate to support a side of the battery cell stack assembly.

8. The battery pack according to claim 7, wherein: At least one of an outer surface and an inner surface of the separation member is coated with a metal thin film.

9. The battery pack according to claim 7, wherein: The protruding portion includes any one of a dot pattern, a stripe pattern, a grid pattern, and a honeycomb pattern.

10. The battery pack according to claim 7, wherein: The separation member includes a first supporting portion and a second supporting portion respectively connecting the top and the bottom of two side surfaces including the protruding portion, Wherein, the thickness of the first supporting portion and the second supporting portion increases toward the edge.

11. The battery pack according to claim 7, wherein: The separation member includes any one of glass and stainless steel.

12. The battery pack according to claim 7, wherein: At least one of an outer surface and an inner surface of the separation member is coated with a metal thin film.

13. The battery pack according to claim 7, wherein: The separation member is attached to each of the two sides of the battery cell stack.

14. The battery pack according to claim 7, wherein: The battery pack housing further includes a separation wall connected to the bottom plate, wherein the separation wall is inserted between the battery cell stack assemblies so that any pair of adjacently arranged battery cell stack assemblies are separated.

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