Battery cell assembly and battery pack comprising same

Abstract

The invention relates to a battery cell assembly and a battery pack comprising the same. The battery cell assembly comprises: a battery cell stack in which a plurality of battery cells are stacked and electrode leads are drawn out; and a heat transfer prevention pad which has heat transfer resistance and is provided on either side of the cell stack.

Description

Technical Field

[0001] The present disclosure relates to a battery cell assembly and a battery pack including the battery cell assembly, and in particular to a battery cell assembly with thermal stability and a battery pack including the battery cell assembly.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0120778 filed on September 12, 2023, and Korean Patent Application No. 10-2024-0014106 filed on January 30, 2024, and all contents disclosed in the relevant Korean patent application documents are incorporated as part of this specification. Background Art

[0003] The operating voltage of a single cell in a secondary battery is approximately 2.5V to 4.5V. Therefore, when a higher output voltage is required, multiple cells can be connected in series to form a battery pack. Furthermore, a battery pack can be configured by connecting multiple cells in parallel according to the required charge and discharge capacity. Therefore, the number of cells included in a battery pack can vary depending on the required output voltage or charge and discharge capacity.

[0004] When configuring a battery pack by connecting a plurality of battery cells in series / parallel, a cell assembly including at least two battery cells is generally configured first, and the battery pack is configured by adding such a cell assembly and other components.

[0005] The battery pack is a box-shaped metal housing structure in which multiple cell assemblies are housed in close contact. In other words, each cell assembly is placed in the battery pack in a state of maximum close contact, leaving no wasted space.

[0006] However, this structure has the problem that it is very susceptible to fire in any one of the battery cell assemblies. In other words, when a battery cell assembly experiences thermal runaway and generates high-temperature heat, the high-temperature heat may be immediately transferred to other adjacent battery cell assemblies, and as a result, a dangerous situation may occur in which all the battery cell assemblies housed inside the battery pack explode.

[0007] When battery packs are used in electric vehicles, etc., it is necessary to delay the transfer of heat from the initial point of the abnormal phenomenon to the point of explosion as much as possible to ensure time for driver evacuation.

[0008] Therefore, conventionally, research has been conducted on methods for maximizing the time it takes to transfer heat from any one battery cell component experiencing thermal runaway to other battery cell components.

[0009] Prior art literature

[0010] Korean Patent Gazette No. 10-2021-0041950 Summary of the Invention

[0011] Technical issues

[0012] Therefore, the present disclosure is designed to solve the above problems, and an object of the present disclosure is to provide a battery cell assembly having a structure capable of maximally suppressing heat transfer when high-temperature heat is generated due to abnormal phenomena in a plurality of stacked battery cells.

[0013] Another object of the present disclosure is to provide a battery pack having a structure capable of delaying heat propagation between a plurality of housed battery cell assemblies.

[0014] Other purposes and advantages of the present disclosure can be understood through the following description and will become more apparent from the embodiments of the present disclosure. In addition, it is obvious that the purposes and advantages of the present disclosure can be achieved by the means of the present disclosure disclosed in the claims of the patent and their combinations.

[0015] Technical Solution

[0016] The present disclosure provides a battery cell assembly, which includes: a battery cell stack, the battery cell stack including a plurality of stacked battery cells, the battery cells having electrode leads protruding from the battery cells; a bus bar frame, the bus bar frame including a bus bar electrically connected to the electrode lead of each battery cell, the bus bar being connected to at least one of the front and the rear of the battery cell stack; and an anti-heat transfer pad having anti-heat transfer properties and being arranged on both sides of the battery cell stack.

[0017] The heat transfer prevention pad may include: a heat absorption pad including a phase change material and absorbing external heat; and a heat insulation pad having high thermal resistance.

[0018] The battery cell assembly, wherein the heat transfer prevention pad is configured to attach any one of the heat absorption pad and the heat insulation pad to one side of the battery cell stacked at the outermost position of the battery cell stack.

[0019] A pair of support members is provided on both sides of the battery cell stack and coupled to sides of the busbar frame to support the plurality of battery cells, wherein the heat transfer prevention pad may be interposed between the battery cell stack and the support members.

[0020] The battery cell stack may further include a compression pad interposed between any pair of battery cells among the plurality of battery cells.

[0021] In addition, the present disclosure provides a battery pack, which includes: the battery cell assembly of the present disclosure; and a battery pack housing including an accommodation space, in which the battery cell assembly is accommodated, wherein the battery pack housing includes: a bottom plate, which supports the lower part of the battery cell assembly; and a side beam, which is connected to the edge portion of the bottom plate to support the side of the battery cell assembly.

[0022] A plurality of battery cell assemblies are placed in the placement space, and the battery pack housing may further include a crossbeam disposed between any pair of adjacent battery cell assemblies.

[0023] The cross beam may be adhered to and coupled to the side of the battery cell assembly such that there is no gap between the cross beam and the battery cell assembly.

[0024] The side surface of the beam may be in close contact with the heat absorbing pad of the battery cell assembly it faces.

[0025] The cross beam may be coupled to each of the adjacently disposed battery cell assemblies, and the cross beam may be coupled to the bottom plate to fix the battery cell assemblies to the battery pack case.

[0026] The heat transfer prevention pad may include: a heat absorption pad including a phase change material and absorbing external heat; and a heat insulation pad having high thermal resistance.

[0027] The battery cell assembly may further include a pair of supporting members, which are arranged on both sides of the battery cell stack and connected to the side of the busbar frame to support the multiple battery cells, and any pair of adjacently arranged battery cell assemblies can be fixed to each other by connecting corresponding supporting members positioned facing each other.

[0028] The heat transfer prevention pad may be interposed between the battery cell stack and the support member.

[0029] The support member may be adhered to and coupled to the anti-heat transfer pad such that there is no gap between the support member and the anti-heat transfer pad.

[0030] Beneficial effects

[0031] The battery cell assembly disclosed herein and the battery pack including the battery cell assembly disclosed herein have an effect of improving thermal stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an exploded perspective view of a battery cell assembly according to a first embodiment of the present disclosure.

[0033] Figure 2 It shows Figure 1 A three-dimensional diagram of the connection state of the end plates in the battery cell assembly.

[0034] Figure 3 It is cut along the width of the battery cell component Figure 1 Cross-sectional view of a battery cell assembly.

[0035] Figure 4 is a perspective view of a battery cell assembly according to a second embodiment of the present disclosure.

[0036] Figure 5 is an exploded perspective view showing a plurality of battery cell assemblies in an aligned state according to the first embodiment.

[0037] Figure 6 is a perspective view showing an important portion of a battery pack case in which a plurality of aligned battery cell assemblies are mounted.

[0038] Figure 7 It is located in Figure 6 A cross-sectional view of a pair of battery cell assemblies between any one of the crossbars in a battery pack.

[0039] Figure 8 is a perspective view showing a battery pack case in which a plurality of battery cell assemblies are mounted according to a second embodiment.

[0040] Figure 9 yes Figure 8 A cross-sectional view of a pair of battery cell assemblies in close contact in a battery pack. DETAILED DESCRIPTION

[0041] The present invention will be described in detail below with reference to the accompanying drawings. Prior to this, the terms and words used in this specification and claims should not be construed as limited to general or dictionary terms, but should be interpreted based on the concepts that the inventors have appropriately defined the terms to best explain the principles of the present invention, using the meanings and concepts of the technical concepts of the present disclosure.

[0042] Therefore, it should be understood that the embodiments described herein and the configurations shown in the drawings are merely the most preferred embodiments of the present disclosure and are not intended to represent all technical ideas of the present disclosure, but that various equivalents and modifications may exist that may replace them upon submission.

[0043] Furthermore, in describing the present disclosure, if it is considered that a detailed description of the configuration or function of the relevant disclosure would obscure the subject matter of the present disclosure, the detailed description of the configuration or function of the relevant disclosure will be omitted.

[0044] The present disclosure is shown in the embodiments to more fully explain the present disclosure to those skilled 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. Therefore, the size or ratio of each component does not necessarily indicate its actual size or ratio.

[0045] The present disclosure relates to a battery cell assembly and a battery pack including the same, wherein the battery pack of the present disclosure has improved thermal stability by suppressing heat transfer between each housed battery cell assembly to the greatest extent.

[0046] Figures 1 to 3 Relating to a battery cell assembly according to a first embodiment of the present disclosure, Figure 4 Relating to a battery cell assembly according to a second embodiment of the present disclosure, Figures 5 to 7 A battery pack including the battery cell assembly according to the first embodiment of the present disclosure is provided, and Figure 8 and Figure 9 A battery pack including a battery cell assembly according to a second embodiment of the present disclosure is provided.

[0047] Hereinafter, specific embodiments of the cell assembly and battery pack according to the present disclosure will be described in detail with reference to the accompanying drawings. For reference, unless otherwise specified, the directions of front, rear, up, down, left, and right used to designate relative positions in the following description are for the purpose of understanding the present disclosure and refer to the directions shown in the accompanying drawings.

[0048] Here, the width direction of the cell assembly is defined as the direction in which the cells are stacked, and the longitudinal direction of the cell assembly is defined as the direction orthogonal to the width direction of the cell assembly, in other words, the direction connecting the two sides of the busbar frame or the coupled end plates.

[0049] In addition, the width direction of the battery pack refers to the longitudinal direction of the battery cell assembly accommodated in the battery pack, and the longitudinal direction of the battery pack refers to the width direction of the battery cell assembly accommodated in the battery pack.

[0050] Battery cell assembly 100

[0051] The battery cell assembly 100 of the present disclosure includes a battery cell stack 110 , and the battery cell stack 110 includes a plurality of battery cells 111 .

[0052] The battery cell 111 includes an electrode assembly in which electrodes including negative and positive electrodes and separators are alternately stacked; electrode leads electrically connected to the electrodes; and a battery case surrounding the electrode assembly and sealing the electrode assembly so that the electrode leads protrude to the outside.

[0053] The battery cells 111 may be divided into prismatic battery cells 111 and pouch-type battery cells 111 according to the shapes of the electrode assembly and the battery case.

[0054] The prismatic battery cell 111 may take a stacked form in which electrodes and separators are stacked into an electrode assembly by alternately stacking them, and may be a stacked folded form in which electrodes and the like are provided on a sheet-like separator folded at intervals.

[0055] The prismatic battery cells 111 are inserted into a battery case, wherein the electrode assembly is in the form of a square box.

[0056] The pouch-type battery cell 111 may be in a stacked form in which electrode assemblies are in a stacked form, or may be in a stacked and folded form.

[0057] The pouch-type battery cell 111 is an electrode assembly inserted into a pouch-type battery cell case. Therefore, the battery cell assembly 100 may include any one of a cylindrical battery cell 111 , a prismatic battery cell 111 , and a pouch-type battery cell 111 .

[0058] The battery cell assembly 100 includes a bus bar frame 120 including a plurality of battery cells 111 and a bus bar 121 electrically connected to an electrode lead included in each battery cell 111 .

[0059] The battery cell assembly 100 may further include a module frame that surrounds the periphery of the battery cell stack 110 to protect each battery cell 111 from external impact. In this case, the module frame may be provided to support or protect only a portion of the battery cell stack 110, or the module frame may be provided on all exposed portions of the battery cell stack 110 to completely isolate the battery cell stack 110 from the outside.

[0060] However, for ease of understanding of the internal structure, the embodiments of the present disclosure will focus on the battery cell assembly 100 to which the module frame configuration is not applied.

[0061] (First embodiment)

[0062] Figure 1 is an exploded perspective view of a battery cell assembly 100 according to a first embodiment of the present disclosure.

[0063] like Figure 1 As shown, the battery cell assembly 100 of the present disclosure includes a battery cell stack 110 and a busbar frame 120 .

[0064] The battery cell stack 110 takes the form of a plurality of battery cells 111 stacked in one direction.

[0065] Each battery cell 111 includes an electrode assembly in which electrodes and separators are alternately stacked, electrode leads connected to the electrodes, a case surrounding the electrode assembly so that the electrode leads protrude to the outside, and an electrolyte filled in the case together with the electrode assembly.

[0066] The electrode may be a positive electrode having a coating of a slurry of a positive electrode active material, a binder resin, a conductor, and other additives on at least one side of a current collector, or a negative electrode having a coating of a slurry of a negative electrode active material, a binder resin, a conductor, and other additives on at least one side of a current collector. Therefore, the electrode assembly includes alternating stacks of positive electrodes, separators, and negative electrodes.

[0067] The positive electrode active material may include a lithium-containing transition metal oxide, and the negative electrode active material may include lithium metal, a carbon material, and a metal compound or a mixture thereof that can absorb and release lithium ions.

[0068] The separator may be a conventional porous polymer film used in lithium secondary batteries.

[0069] The housing is formed by processing a sheet into a predetermined shape. In this case, the sheet includes a multilayer structure in which an outermost resin layer made of an insulating material such as polyethylene terephthalate (PET) or nylon, a metal layer made of an aluminum material to maintain mechanical strength and prevent moisture and oxygen penetration, and an inner resin layer made of a polyolefin-based material having thermal adhesiveness and serving as a sealing material are stacked.

[0070] As needed, the sheet material forming the housing may have a predetermined adhesive resin layer interposed between the inner resin layer and the metal layer, and between the outer resin layer and the metal layer. The adhesive resin layer is used to smoothly attach different types of materials and is formed into a single layer or multiple layers. The material may generally be a polyolefin resin or a polyurethane resin for smooth processing, and a mixture thereof may also be used.

[0071] Depending on the shape of the electrode assembly and the case, the battery cell 111 can be classified into a prismatic, pouch-type, and cylindrical shape. However, in the detailed description and drawings of the present disclosure, for ease of understanding, the pouch-type battery cell 111 will be described as an example.

[0072] Bus Bar Frame 120 The frame includes a bus bar frame 120 , which is electrically connected to the electrode leads of the cell stack 110 and is coupled to at least one of the front and rear surfaces of the cell stack 110 .

[0073] The busbar frame 120 is used to apply pressure to each of the battery cells 111 included in the battery cell stack 110 and align them, and to collect the electrode leads protruding from each of the battery cells 111. Specifically, the conductive busbar frame 120 is fixed and disposed on the busbar frame 120, and a plurality of electrode leads led out of the battery cell stack 110 are coupled to the busbar frame 120. The coupling of the electrode leads and the busbar frame 120 is generally performed by welding, but any other coupling method capable of electrically connecting the electrode leads and the busbar frame 120 may be utilized.

[0074] The battery cell assembly 100 may further include an end plate 130 covering the bus bar frame 120 .

[0075] Figure 2 It shows Figure 1 A three-dimensional view of the connection state of the end plate 130 in the battery cell assembly 100.

[0076] The battery cell assembly 100 may further include an end plate 130 configured to cover the bus bar frame 120 to protect the bus bar frame 120 from external impact, such as Figure 1 and Figure 2 shown.

[0077] The battery cell assembly 100 of the present disclosure may further include anti-heat transfer pads 140 having heat transfer resistance on both sides of the battery cell stack 110 .

[0078] Figure 3 yes Figure 1 1 is a cross-sectional view of the battery cell assembly 100 taken along the width direction of the battery cell assembly 100 .

[0079] Reference Figure 3 A pair of anti-heat transfer pads 140 are respectively disposed on both sides of the battery cell stack 110 .

[0080] The heat transfer prevention pad 140 includes a heat absorbing pad 141 and a heat insulating pad 142. In other words, the heat transfer prevention pad 140 includes the heat absorbing pad 141 and the heat insulating pad 142 laminated to each other.

[0081] Specifically, the heat absorbing pad 141 includes a phase change material and serves to absorb heat from a material in contact therewith.

[0082] The heat absorbing pad 141 includes a heat absorbing material having either a solid state or a liquid state, and the heat absorbing material undergoes a phase change by absorbing heat of a material in contact with the heat absorbing pad 141. Therefore, the heat absorbing pad 141 can absorb a certain amount of heat of the contacting material.

[0083] The thermal insulation pad 142 is characterized by high thermal resistance.

[0084] Specifically, the thermal insulation pad 142 includes a thermal insulation material having low thermal conductivity, and the thermal insulation material prevents heat from moving through the thermal insulation pad 142 .

[0085] In some embodiments, as Figure 3 As shown, the heat absorption pad 141 is disposed facing one side of the battery cells 111 stacked at the outermost position of the battery cell stack 110 , and the heat insulation pad 142 is interposed between the heat absorption pad 141 and the battery cell stack 110 .

[0086] In another embodiment not shown, the thermal insulation pad 142 is disposed facing one side of the battery cells 111 stacked at the outermost position of the battery cell stack 110 , and the heat absorption pad 141 is interposed between the thermal insulation pad 142 and the battery cell stack 110 .

[0087] In other words, the heat transfer prevention pad 140 is configured such that any one of the heat insulating pad 142 and the heat absorbing pad 141 is attached to one side of the cell stack 110 .

[0088] When high temperature heat is generated in the adjacent cell stack 110, the heat absorption pad 141 mainly prevents the heat from moving through the heat insulation pad 142 in contact with the cell stack 110. In addition, some heat conducted through the heat insulation pad 142 is secondarily absorbed by the heat absorption pad 141.

[0089] The heat absorbing pad 141 is characterized by absorbing external heat.

[0090] The heat transfer prevention pad 140 of the present disclosure, including the heat absorption pad 141 and the heat insulation pad 142 , absorbs heat and simultaneously suppresses heat from passing through to the greatest extent when a contacting material emits heat.

[0091] In some embodiments, the battery cell stack 110 may further include a compression pad 160 interposed between any pair of battery cells 111 among the plurality of battery cells 111 .

[0092] The cell stack 110 may include a plurality of compression pads 160 interposed between the cells 111, and in this case, the intervals of the compression pads 160 may be as follows: Figure 3 The arrangement shown is regular, or may be irregular. For example, one battery cell 111 may be located between a pair of compression pads 160 , or a plurality of battery cells 111 may be located between a pair of compression pads 160 .

[0093] The compression pad 160 may at least partially absorb impact and pressure that may occur between the stacked battery cells 111 .

[0094] Compression pads 160 may be inserted into the battery cell stack 110 at predetermined intervals to physically separate the battery cells 111 .

[0095] (Second embodiment)

[0096] Figure 4 is a perspective view of a battery cell assembly 100 according to a second embodiment of the present disclosure.

[0097] refer to Figure 4 The battery cell assembly 100 may further include a support member 150 for protecting both sides of the exposed battery cell stack 110 .

[0098] In other words, the battery cell assembly 100 of the present disclosure may further include a pair of support members 150, each support member being disposed on both sides of the battery cell stack 110 to support the plurality of battery cells 111, such as Figure 4 shown.

[0099] The support member 150 serves to protect the battery cell stack 110 and the heat transfer prevention pads 140 provided on both sides of the battery cell stack 110 from external impact.

[0100] In addition, the support member 150 serves to provide a position where coupling members such as bolts, screws, etc. are directly coupled to fix the cell stack 110 to a battery pack when the cell assembly 100 is mounted to a battery pack or the like.

[0101] The support member 150 may also serve to prevent heat from moving between the battery cell assembly 100 including the support member 150 and other battery cell assemblies adjacent thereto.

[0102] In some embodiments, the support member 150 may be coupled to a side of a frame of the bus bar frame 120 disposed adjacent to the cell stack 110 .

[0103] In some embodiments, the support member 150 may be coupled to a side of the end plate 130 provided on the busbar frame 120 .

[0104] battery pack

[0105] The battery pack of the present disclosure includes a cell assembly 100 and a pack case 200 in which the cell assembly 100 is housed. In other words, a plurality of cell assemblies 100 according to the first or second embodiment may be assembled and mounted in one pack case 200 to form a battery pack.

[0106] Figure 5 is an exploded perspective view showing a plurality of battery cell assemblies 100 in an aligned state according to the first embodiment, and Figure 6 is a perspective view showing an important portion of a battery pack case 200 in which a plurality of aligned battery cell assemblies 100 are mounted.

[0107] refer to Figure 5 and Figure 6 The battery pack of the present disclosure includes a battery cell assembly 100 and a battery pack housing 200 . The battery pack housing includes an installation space A in which the battery cell assembly 100 is installed.

[0108] In some embodiments, the battery pack housing 200 includes a bottom plate 210 configured to surround and support lower portions of the plurality of battery cell assemblies 100 and a side beam 220 configured to surround and support the side portions.

[0109] In some embodiments, the battery pack housing 200 may further include a crossbeam 240 separating the battery cell assemblies 100 .

[0110] The plurality of battery cell assemblies 100 may be Figure 5As shown, the crossbars 240 may be disposed between a pair of adjacent battery cell assemblies 100 in the width direction to physically separate the battery cell assemblies 100 from each other while supporting the sides of the battery cell assemblies 100 .

[0111] The seating space A is a space formed by the upper surface of the bottom plate 210 and the inner surface of the side member 220 , and a plurality of battery cell assemblies 100 are seated in the seating space A. As shown in FIG.

[0112] like Figure 6 As shown, the battery pack housing 200 may further include a central beam 230 that crosses the central portion and is coupled to the bottom plate 210 to divide the housing space A. The central beam 230 divides the housing space A of the battery pack housing 200 into two compartments and ensures physical isolation between the battery cell assemblies 100 housed in each compartment.

[0113] In some embodiments, as Figure 5 and Figure 6 As shown, the crossbeam 240 can be assembled with the cell assembly 100 in the battery pack case 200. In other words, the crossbeam 240 can be primarily coupled to each adjacently disposed cell assembly 100 and can be coupled to the bottom plate 210 to secure the cell assembly 100 to the battery pack case 200.

[0114] In some embodiments, the cross beam 240 may be coupled to the center beam 230 and the side beams 220 separately from the battery cell assemblies 100. In other words, the cross beam 240 interposed between the battery cell assemblies 100 may be coupled to the bottom plate 210 and may also be coupled to the center beam 230 and the side beams 220. Specifically, both ends of the cross beam 240 may be coupled to the side of the center beam 230 and the inner surface of the side beams 220, respectively.

[0115] Therefore, the plurality of battery cell assemblies 100 may be individually positioned in the spaces formed by the side beams 220 , the center beam 230 , and the cross beam 240 .

[0116] In some embodiments, the crossbeam 240 can prevent each cell assembly 100 from being shaken or damaged by external impact. Therefore, the crossbeam 240 can be attached to the side of the cell stack 110 and coupled to the side of the cell stack 110 so that there is no gap between the crossbeam 240 and the cell assembly 100. Figure 6 shown.

[0117] Figure 7 It is located in Figure 6 A cross-sectional view of a pair of battery cell assemblies 100 between any one of the cross beams 240 in the battery pack. More specifically, Figure 71 is a cross-sectional view of a pair of battery cell assemblies 100 taken along the width direction of the battery cell assembly 100 , and is an embodiment in which the heat insulating pad 142 is interposed between the heat absorbing pad 141 and the battery cell stack 110 .

[0118] refer to Figure 7 , crossbeams 240 are in contact with the heat absorbing pads 141 of the battery cell assemblies 100 facing them. In other words, high-temperature heat transferred from any battery cell assembly 100 can pass through crossbeams 240 and first be transferred to the heat absorbing pad 141 included in another battery cell assembly 100. The heat absorbing pad 141 primarily absorbs the heat conducted from crossbeams 240, and the thermal insulation pad 142 adjacent to the heat absorbing pad 141 minimizes the transfer of any additional heat not absorbed by the heat absorbing pad 141.

[0119] Although not shown, in the embodiment where the thermal insulation pad 142 is interposed between the heat absorption pad 141 and the battery cell stack 110, the thermal insulation pad 142 mainly blocks the heat conducted from the crossbeam 240. Then, the heat absorption pad 141 adjacent to the thermal insulation pad 142 absorbs the additional heat transmitted through the thermal insulation pad 142.

[0120] The anti-heat transfer pad 140 disclosed in the present invention can reduce the heat transferred by the above two methods.

[0121] In conventional battery packs, a pair of battery cell assemblies 100 are arranged at a very close distance with a crossbar 240 therebetween, so that if either battery cell assembly 100 experiences thermal runaway, the high-temperature heat generated by the thermally runaway battery cell assembly 100 can be transferred to the other battery cell assembly 100 through the contacting crossbar 240. In contrast, in the case of the battery pack of the present disclosure, the anti-heat transfer pad 140 provided on each battery cell assembly 100 can suppress such heat transfer to a certain extent.

[0122] Figure 8 is a perspective view showing a battery pack case 200 in which a plurality of battery cell assemblies 100 are mounted according to a second embodiment, and Figure 9 yes Figure 8 sectional view of a pair of battery cell assemblies 100 in close contact in a battery pack.

[0123] Figure 8 The battery pack housing 200 includes a Figure 4 A battery cell assembly 100 of the second embodiment is shown.

[0124] The battery cell assembly 100 further includes a pair of support members 150 disposed on both sides of the battery cell stack 110 and coupled to sides of the busbar frame 120 to support the plurality of battery cells 111 .

[0125] Therefore, any pair of adjacently disposed cell assemblies 100 may be fixed by coupling their respective support members 150 positioned facing each other. In this case, the two adjacent support members 150 may be screwed and fixed to each other by a coupling member such as a bolt.

[0126] Figure 8 The battery pack including the cell assembly 100 and the battery pack case 200 includes support members 150 located on both sides of each cell assembly 100. Figure 5 and Figure 6 Unlike the illustrated battery pack, two support members 150 are interposed between a pair of adjacently disposed battery cell stacks 110 .

[0127] In some embodiments, the support member 150 not only enhances the support force of the battery cell stack 110 , but also serves to prevent heat from moving between the battery cell assemblies 100 .

[0128] refer to Figure 9 , two support members 150 are interposed between a pair of battery cell stacks 110. In this case, when any one of the battery cell stacks 110 thermally runs away, the high-temperature heat generated by the thermally runaway battery cell stack 110 can be absorbed or blocked as it sequentially passes through the thermal insulation pad 142, the heat absorption pad 141, and the support member 150 and then continuously moves through the support member 150, the heat absorption pad 141, and the thermal insulation pad 142 of the other battery cell assembly 100.

[0129] Although not shown, the battery pack of the present disclosure further includes an upper case coupled to the pack case 200 to cover an upper portion of the battery cell assembly 100 positioned in the pack case 200 .

[0130] The upper case is specifically coupled with the side beam 220 of the battery pack case 200 so that each battery cell assembly 100 located in the internal space can be isolated from the outside.

[0131] As described above, the present disclosure has been described in more detail through the drawings and embodiments. However, since the configuration described in the drawings or embodiments described herein is only one embodiment of the present disclosure and does not represent the overall technical spirit of the present disclosure, it should be understood that the present disclosure covers various equivalents, modifications and replacements at the time of filing this application.

[0132] [Explanation of Reference Numerals]

[0133] 100: Battery cell components

[0134] 110: Battery cell stack

[0135] 111: Battery Cell

[0136] 120: Busbar frame

[0137] 121: Busbar

[0138] 130: End plate

[0139] 140: Anti-heat transfer pad

[0140] 141: Heat absorbing pad

[0141] 142: Insulation pad

[0142] 150: Supporting member

[0143] 160: Compression pad

[0144] 200: Battery pack housing

[0145] 210: Base plate

[0146] 220: Side beam

[0147] 230: Center beam

[0148] 240: beam

[0149] A: Placement space

Claims

1. A battery cell assembly, comprising: a battery cell stack comprising a plurality of stacked battery cells, the battery cells having electrode leads protruding from the battery cells; as well as The anti-heat transfer pads have heat transfer resistance and are arranged on both sides of the battery core stack.

2. The battery cell assembly according to claim 1, wherein: The anti-heat transfer pad comprises: a heat absorbing pad containing a phase change material and absorbing external heat; and Thermal insulation pad with high thermal resistance.

3. The battery cell assembly according to claim 2, wherein: The heat transfer prevention pad is configured to attach any one of the heat absorption pad and the heat insulation pad to one side of the battery cell stacked at the outermost position of the battery cell stack.

4. The battery cell assembly according to claim 1 , further comprising a pair of support members, the pair of support members being disposed on both sides of the battery cell stack to support the plurality of battery cells. in, The anti-heat transfer pad is inserted between the battery cell stack and the supporting member.

5. The battery cell assembly according to claim 1, wherein: The battery cell stack further includes a compression pad interposed between any pair of battery cells among the plurality of battery cells.

6. A battery pack, comprising: The battery cell assembly according to claim 1; as well as A battery pack housing comprising a placement space, wherein the battery cell assembly is placed in the placement space, Wherein, the battery pack housing includes: a bottom plate supporting a lower portion of the battery cell assembly; and A side beam is coupled to an edge portion of the bottom plate to support a side of the battery cell assembly.

7. The battery pack according to claim 6, wherein: A plurality of the battery cell assemblies are placed in the placement space, and Wherein, the battery pack housing further includes a crossbeam arranged between any pair of adjacent battery cell assemblies.

8. The battery pack according to claim 7, wherein: The cross beams conform to and are coupled to the sides of the cell assemblies so that there is no gap between the cross beams and the cell assemblies.

9. The battery pack according to claim 7, wherein: The side surface of the beam is in close contact with the heat absorbing pad of the battery cell assembly facing the beam.

10. The battery pack according to claim 7, wherein: The cross beam is coupled to each of the adjacently disposed battery cell assemblies, and the cross beam is coupled to the bottom plate to fix the battery cell assemblies to the battery pack case.

11. The battery pack according to claim 6, wherein: The anti-heat transfer pad comprises: a heat absorbing pad containing a phase change material and absorbing external heat; and Thermal insulation pad with high thermal resistance.

12. The battery pack according to claim 6, wherein: The battery cell assembly further includes a pair of supporting members disposed on both sides of the battery cell stack to support the plurality of battery cells, and any pair of adjacently disposed battery cell assemblies are fixed to each other by coupling the supporting members disposed facing each other.

13. The battery pack according to claim 12, wherein: The anti-heat transfer pad is interposed between the battery cell stack and the supporting member.

14. The battery pack according to claim 12, wherein: The support member is adhered to and coupled to the anti-heat transfer pad such that there is no gap between the support member and the anti-heat transfer pad.

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