Battery arrangement

Abstract

A battery assembly (200, 300) comprising: a plurality of battery cells (110) stacked and arranged in a predetermined stacking direction; a receiving housing (210, 310) that receives the plurality of battery cells (110); an insertion space (288, 388) formed between the plurality of battery cells (110) and the receiving case (210, 310) in the stacking direction; and an insertion member (270) located in the insertion space (288, 388), extending in a height direction of the receiving housing (210, 310) and enclosing a buffer space (273) therein.

Description

BACKGROUND1. Field of InterestThe present disclosure relates to a battery assembly, and more particularly to a battery assembly for retarding heat spread (TP) during thermal cycling of a battery cell.2. Description of the Prior ArtDue to fires and explosions that occur when using lithium secondary batteries, there has been an increasing social concern over the safety of battery usage. One of the most important tasks in the development of lithium secondary batteries is therefore to avoid instabilities such as fires and explosions caused by thermal runaway of the battery cells.In particular, a battery module / pack includes an empty space besides the battery cells constituting the power source. If a fire occurs due to an external influence or a problem with a battery cell, the flame may spread to adjacent cells through the empty space, thus enlarging the damage caused by the fire. Since this risk of fire could be the greatest obstacle to the market of electric vehicles, there is currently a search for possibilities for reducing the spread of fire.SUMMARYFirst, according to an aspect of the present disclosure, an object is to prevent or retard high temperature gas generated in a battery cell in which thermal runaway has occurred between one or more battery cells within the battery assembly from escaping in the direction of withdrawal of the battery cell.Second, according to another aspect of the present disclosure, it is an object to discharge high temperature gas generated in a battery cell that is thermally burned along an intended path.Third, according to yet another aspect of the present disclosure, it is an object to increase the stability and life of a battery pack by increasing the heat or fire resistance.Fourth, according to still another aspect of the present disclosure, it is an object to add a process of inserting an insertion member (or an insertion member, a filling part) into an empty space formed between the bus bar assembly and the cell tab of the battery to the assembling process of the existing battery assembly.Fifth, according to another aspect of the present disclosure, it is an object to provide an assembling process that facilitates the arrangement of an insert member in assembling a battery assembly.A battery assembly according to the present disclosure may be widely used in the field of environmental friendly technology, for example, electric vehicles, battery charging stations, energy storage systems (ESS), and other battery-based photovoltaic and wind turbines. Moreover, the battery assembly according to the present disclosure may be used for environmentally friendly mobility including electric and hybrid vehicles to prevent climate conversion through suppression of air pollution and greenhouse gas emissions.In order to achieve the above-described objects, a battery assembly according to the present disclosure may include a plurality of battery cells stacked and arranged in a predetermined stacking direction, a housing housing housing the plurality of battery cells, an insertion space formed between the plurality of battery cells and the housing housing in the stacking direction, and an insertion member arranged in the insertion space, wherein the insertion member may include a support body forming the buffer space and a rib portion dividing the buffer space into a plurality of divided spaces.According to an embodiment, each of the plurality of battery cells may include a main body including an electrode assembly that generates or stores electric energy, and a tab portion that is connected to the electrode assembly and protrudes outward from the main body, and the insertion space may be formed between tab portions of the plurality of battery cells.Moreover, the battery assembly according to the present disclosure may further include a bus bar electrically connected to the plurality of battery cells, wherein the insertion space may be formed by the main body of each of the plurality of battery cells, the tab portion of each of the plurality of battery cells, and the bus bar.According to an embodiment, the support body may include a body inner surface forming an inner surface of the buffer space, and wherein the rib portion may include a first rib protruding from a portion of the body inner surface, extending over the buffer space, and connected to another side of the body inner surface.According to an embodiment, the rib portion may further include a second rib extending in a direction inclined or perpendicular to the first rib and connected to the first rib or the body inner surface.According to an embodiment, the first rib and the second rib may include a plurality of first ribs and a plurality of second ribs, respectively, and the plurality of second ribs may connect between the plurality of first ribs or between the plurality of first ribs and the body inner surface.In an embodiment, each of the two ends of the first rib may be branched and connected to the inner surface of the body.According to an embodiment, the rib portion may include a first intersecting rib and a second intersecting rib intersecting each other and connected to the first rib or the body inner surface.According to an embodiment, the first rib, the first intersecting rib, and the second intersecting rib may include a plurality of first ribs, a plurality of first intersecting ribs, and a plurality of second intersecting ribs, respectively, and wherein the plurality of first intersecting ribs and the plurality of second intersecting ribs may be disposed between the plurality of first ribs or between the plurality of first ribs and the body inner surface.According to an embodiment, an intersection of the first intersecting rib and the second intersecting rib may be located between the plurality of first ribs or between the plurality of first ribs and the body inner surface.According to an embodiment, the first rib may be arranged in the stacking direction.According to an embodiment, the insert element may include a refractory material.According to an embodiment, the support body may have a tubular shape in which both ends in the height direction of the accommodating case are open.According to an embodiment, the virtual cross section of the support body at a certain height of the receiving housing may have a rectangular shape.According to an embodiment, the rib portion may extend lower than a lower end of the support body in the height direction of the housing.According to an embodiment, the support body and the rib portion may be formed integrally.According to an embodiment, the support body may include a first body layer forming an inner surface of the buffer space and connected to at least a part of the rib portion, and a second body layer surrounding the first body layer and forming an outer surface of the support body.According to an embodiment, the first body layer and the second body layer may be made of different materials.According to an embodiment, the virtual cross section of the spaces divided by the rib portion may have a hexagonal shape at a predetermined height of the accommodating case.An assembly process of a battery assembly according to the present disclosure may include stacking the plurality of battery cells, connecting the plurality of stacked battery cells to the receptacle cover, inserting an insertion member including a buffer space into an insertion space formed between the tab portions of the plurality of battery cells, and connecting the receptacle body to the receptacle cover.First, according to an embodiment of the present disclosure, a high temperature gas generated in a battery cell in which thermal runaway occurs between one or more battery cells in the battery assembly can be prevented or delayed from escaping in a discharge direction of the battery cell.Second, according to another embodiment of the present disclosure, the high temperature gas generated in the battery cell in which thermal runaway has occurred may be discharged in the intended path.Third, according to another aspect of the present disclosure, a process of inserting an insertion member (or an insertion aid material, a filling part) into a blank space formed between the bus bar assembly and the cell strip of the battery may be added to the existing assembly process of the battery assembly.Fourth, according to another aspect of the present disclosure, the arrangement of the insert member can be facilitated in assembling the battery assembly.Fifthly, according to another aspect of the present disclosure, the stability of the battery assembly can be improved by increasing the heat or fire resistance of the battery assembly.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is an example of a battery assembly according to the present disclosure. FIG. 2 shows an example of disassembling a battery assembly according to the present disclosure. FIG. 3 shows a battery arrangement according to the present disclosure in plan view. FIG. 4 is an example of an insert element accommodated in an insertion space according to the present disclosure, as viewed from above. FIGS. 5A and 5B each show an example of an insert element according to the present disclosure. FIGS. 6A and 6B each show another example of an insert element according to the present disclosure. FIGS. 7A and 7B each show another example of an insert element according to the present disclosure. FIG. 8 is a comparison of an example of the shape of the insert member before and after swelling of a battery cell. FIG. 9 is a comparison of another example of the shape of the insert member before and after the swelling of the battery cell. FIG. 10 is a flowchart showing an example of an assembling process of a battery assembly according to the present disclosure. FIG. 11 is another example of a battery assembly according to the present disclosure.DETAILED DESCRIPTIONHereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The configuration of an apparatus or a control method described below is for illustrating embodiments of the present disclosure and is not intended to limit the scope of the present disclosure, and reference numerals identically used throughout the specification denote identical components.Moreover, the battery assemblies 200 and 300 according to the present disclosure collectively refer to a battery module, a battery pack, or an energy storage system. Moreover, the battery arrays 200 and 300 according to the present disclosure may refer not only to battery modules but also to battery packs that accommodate battery cells without battery modules, such as cell-to-pack (CTP).FIG. 1 is an example of a battery assembly 200 according to the present disclosure.As shown in FIG. 1, the battery assembly 200 includes a plurality of battery cells 110 and a housing case 210 that houses the plurality of battery cells 110.Each of the plurality of battery cells 110 may include a main body 115 that generates or stores electric power, and tab portions 111 and 112 that protrude from the main body 115 to the outside of the main body 115. The main body 115 may include an electrode assembly (not shown) having an anode and a cathode for generating and storing electrical energy.Moreover, the main body 115 contains an electrolyte (not shown) that is in contact with the electrode assembly. The electrolyte may be liquid or solid. When the electrolyte is a liquid, the electrode assembly may further include a separation membrane for separating the positive electrode and the negative electrode. As shown in FIG. 1, the main body 115 may be in the form of a bag sealed with a sheet-shaped exterior material.FIG. 1 shows an example of a battery cell 110 in the form of a pouch, but the present disclosure is not limited thereto. Therefore, the embodiments may also be applicable to rectangular and cylindrical battery cells.The lead strip portions 111 and 112 may include a first lead strip portion 111 and a second lead strip portion 112 protruding from both sides of the main body 115 in a direction away from the main body 115. The configuration of the wiring strip portions 111 and 112 is not limited thereto, and the wiring strip portions 111 and 112 may be provided with both strips on one side.The accommodation case 210 may protect the plurality of battery cells 110 from external influences such as vibration. The accommodating case 210 may include an accommodating body 219 that forms a part of an accommodating space 280 that accommodates the plurality of battery cells 110 described later.Moreover, the battery assembly 200 may also include a bus bar assembly 150 that electrically connects the plurality of battery cells 110 to the outside world. The bus bar assembly 150 may include a bus bar 170 (see FIG. 2 ) that electrically connects the plurality of battery cells 110 to output a predetermined voltage. A form in which the bus bar assembly 150 or the bus bar 170 to be described later is assembled with the plurality of battery cells 110 may be referred to as a cell stack assembly 100.FIG. 2 is an example of disassembling a battery assembly according to the present disclosure. Referring to FIG. 2, the accommodating case 210 may include an accommodating body 219 that forms the part of the accommodating space 280 that accommodates the plurality of battery cells 110, and an accommodating cover 215 connected to the accommodating body 219 to form the accommodating space 280 together.The plurality of battery cells 110 may be arranged to overlap in a predetermined stacking direction (e.g., in the X direction) in the accommodating body 219.The accommodating case 210 may include an open top 2195, the accommodating body 219 that accommodates the plurality of battery cells 110 through the open top 2195, and also an accommodating cover 215 that is connected to the accommodating body 219 and covers the open top 2195.Accordingly, the receiving cover 215 may be connected to the receiving body 219 to form an upper surface of the receiving space 280 or an upper surface of the receiving housing 210. That is, the accommodating cover 211 may be connected to the accommodating body 219 to cover the open top 2195, and may form the accommodating space 280 together with the accommodating body 299.The receiving space 280 may be formed in the receiving body 219 and may have a space for receiving the cell stack assembly 100. Moreover, the accommodating space 280 may include an insertion space 288 described later.The receiving body 219 can be channel-shaped or U-shaped, with an upper part being open. Referring to FIG. 2, of the side surfaces of the accommodating body 219, both side surfaces 2197 and 2198 of the accommodating body 219 that are opposite to each other in the X direction may also be opened.That is, the accommodating body 219 may include a body bottom surface 2194 forming a bottom surface of the accommodating space 280, and body side surfaces 2191 and 2192 extending toward the accommodating cover 211 from an edge (not illustrated) provided parallel to the stacking direction among the edges of the body bottom surface 2194. A free end of the body side surfaces 2191 and 2192 may be bent to form a flange (not shown) for easier connection to the receiving cover 211.Referring to FIGS. 1 and 2, the height of the receiving body 219 may be less than the height of the plurality of battery cells 110. However, this is only an example, and the height of the accommodating body 219 may be greater than or equal to the height of the plurality of battery cells 110.The cell stack assembly 100 may also include a buffer member 117 or a thermal insulation member 119 (see FIG. 3 ) located between the plurality of battery cells 110. The buffer member 117 may be located between the battery cells 110 or between battery groups BG (see FIG. 4 ) in which the plurality of battery cells 110 are grouped. The same applies to the heat insulating member 119.The thermal barrier 119 may serve as a thermal barrier to prevent flames or heat from propagating to other adjacent battery cells 110 when a battery cell 110 is thermally burned through.The cell stack assembly 100 may include at least one buffer member 117. Similarly, the cell stack assembly 100 may include at least one or more thermal insulation elements 119. Alternatively, the buffer member 117 and the heat insulating member 119 may be formed as a single member to simultaneously perform a heat blocking function and a shock absorbing function.The heat insulating member 119 may have a multilayer structure in a stacking direction of the plurality of battery cells 110. In other words, a layer of the multilayer structure may contain a flame retardant material (or a refractory material). Moreover, another layer of the multilayer structure may reduce the pressure applied to other battery cells 110 when the battery cells 110 are swollen.The plurality of battery cells 110 and the plurality of buffer members 117 may be disposed and stacked at a predetermined location. For example, FIG. 2 illustrates an example in which the long edges of the plurality of battery cells 110 are arranged parallel to the Y direction. Therefore, the plurality of battery cells 110 and the plurality of buffer members 117 may be arranged to overlap each other in the X direction. The same applies to the heat insulating member 119.The thermal insulation element 119 may include a refractory (heat-resistant or flammable) material. The thermal insulation member 119 may include, for example, a material such as a refractory polymer, aerogel, or mica.Referring to FIG. 2, the battery assembly 200 may further include end plates 212 and 213 at both ends of the cell stack assembly 100 in the stacking direction. The end plates 212 and 213 may be provided at both ends of the cell stack assembly 100 or may be connected to both side surfaces 2197 and 2198 of the accommodating body 219.The end plates 212 and 213 may prevent the two ends of the cell stack assembly 100 from being visible to the outside.The battery assembly 200 may include the bus bar 170 electrically connected to the plurality of battery cells 110. Moreover, the battery assembly 200 may also include bus bar frames 151, 152, and 155 that support the bus bar 170 and the plurality of battery cells 110. The bus bar 170 and the bus bar frames 151, 152, and 155 may collectively be referred to as a bus bar assembly 150. That is, the bus bar assembly 150 may include the bus bar 170 electrically connected to the plurality of battery cells 110.The bus bar frames 151, 152, and 155 may be electrically connected to the outside to store (or charge) electric energy in the plurality of battery cells 110 or to conduct (or discharge) electric energy stored in the plurality of battery cells 110 to the outside.The bus bar assembly 150 may include a first bus bar frame 151 and a second bus bar frame 152 extending in the stacking direction of the plurality of battery cells 110 with the plurality of battery cells 110 interposed therebetween.Moreover, the bus bar assembly 150 may include a support frame 155 located on one side of the bus bar assembly 150 and connecting the first bus bar frame 151 and the second bus bar frame 152 to each other.The bus bar assembly 150 will be described with reference to a case where the lead strip portions 111 and 112 are respectively arranged in opposite directions of the main body 115. In contrast to the illustrated cases where the tab portions 111 and 112 are disposed on one side of the main body 115 and in the same direction, the bus bar frames 151 and 152 may be disposed on one side, e.g., on an upper part of the main body 115, and electrically connected to the tab portions 111 and 112.The support frame 155 may prevent modification of the first bus bar frame 151 and the second bus bar frame 152 and support the first bus bar frame 151 and the second bus bar frame 152. In addition, a portion of an electrical device for detecting and controlling the plurality of battery cells 110 may be disposed over the support frame 155.As illustrated in FIG. 2, the bus bar assembly 150 may have a tunnel shape. The length of the first bus bar frame 151 and the length of the second bus bar frame 152 in the stacking direction may be greater than the length of the support frame 155.That is, the support frame 155 may be connected to the first bus bar frame 151 and the second bus bar frame 152 to cover the upper portions of the plurality of battery cells 110. That is, the support frame 155 may cover not only some of the upper portions of the plurality of battery cells 110, but also all of them.As illustrated in FIG. 2, the bus bar 170 may include a first bus bar 171 supported by the first bus bar frame 151 and electrically connected to the first lead strip portion 111, and a second bus bar 172 supported by the second bus bar frame 152 and electrically connected to the second lead strip portion 112.The first bus bar 171 and the second bus bar 172 may be further from the plurality of battery cells 110 than the first bus bar frame 151 and the second bus bar frame 152, respectively. That is, the first bus bar 171 and the second bus bar 172 may be disposed closer to the body side surfaces 2191 and 2192 than the first bus bar frame 151 and the second bus bar frame 152. Therefore, the first lead strip portion 111 and the second lead strip portion 112 may be inserted into slot holes (not shown) formed in the first bus bar frame 151 and the second bus bar frame 152, respectively, to be electrically connected to the first bus bar 171 and the second bus bar 172. However, this is only an example, and the first lead strip portion 111 and the second lead strip portion 112 may be electrically connected to the first bus bar 171 and the second bus bar 172, respectively, in another manner.The battery assembly 200 may also include a heat sink 295 located between the bottom surface 2194 of the housing and the plurality of battery cells 110 to dissipate the heat generated in the plurality of battery cells 110 to the exterior of the battery assembly 200. The heat sink 295 may include a thermal conductive adhesive material, e.g., a heat-dissipating adhesive. Therefore, the plurality of battery cells 110 may be connected to the bottom surface 2194 of the case through the heat sink 295. To this end, the heat sink 295 may be formed on the bottom surface 2194 of the housing.FIG. 3 shows the battery assembly 200 according to the present disclosure in plan view.The bus bar assembly 150 may include the first bus bar 171 electrically connected to the first lead strip portion 111, and the first bus bar frame 151 supporting the first bus bar 171. The first bus bar 171 and the first bus bar frame 151 may collectively be referred to as a first bus bar assembly 1501. That is, the first bus bar assembly 1501 is electrically connected to the first lead strip portion 111 and may support the cell stack assembly 100.The bus bar assembly 1502 may also include the second bus bar 172 electrically connected to the second lead strip portion 112 and the second bus bar frame 152 supporting the second bus bar 172. The second bus bar 172 and the second bus bar frame 152 may collectively be referred to as a second bus bar assembly 1502. That is, the second bus bar assembly 1502 is electrically connected to the second lead strip portion 112 and may support the cell stack assembly 100 together with the first bus bar assembly 1501.Referring to FIG. 3, a void (hereinafter referred to as an insertion space 288) may be formed between the plurality of battery cells 110 and the bus bar assembly 150 due to the electrical connection between the tab portions 111 and 112 and the bus bar assembly 150.In other words, the part of the accommodation space 280 formed in the accommodation case 210 may be a space for accommodating the plurality of battery cells 110, and the other side of the accommodation space 280 may be a space for the insertion space 288.More specifically, the insertion space 288 is a space formed by each of the main bodies 115, the lead strip portions 111 and 112, and the bus bar 170. In the normal case, when thermal runaway occurs in one of the plurality of battery cells 110, the high-temperature heat may be propagated through the insertion space 288 to other adjacent battery cells when exhaust gas occurs. The insertion space 288 may be filled to prevent such heat propagation.To this end, the battery assembly 200 according to the present disclosure may include an insert element 270 (see FIG. 5A ) inserted into the insertion space 288.That is, the battery assembly 200 according to the present disclosure may include the plurality of battery cells 110 stacked and arranged in the predetermined stacking direction, the accommodation case 210 accommodating the plurality of battery cells 110, the insertion space 288 formed between the plurality of battery cells 110 and the accommodation case 210 in the stacking direction, and the insertion member 270 arranged in the insertion space 288.As illustrated in FIG. 3, the buffer member 117 may be disposed between the plurality of battery cells 110. The buffer member 117 may be provided between each of the plurality of battery cells 110. Alternatively, the buffer member 117 may be disposed between the battery groups BG (see FIG. 4 ) in which adjacent battery cells 110 are grouped in a predetermined number of groups.In FIG. 3, the length of the buffer member 117 in a direction from the first bus bar frame 151 to the second bus bar frame 152 is illustrated to be equal to or less than the length of the main body 115 (see FIG. 1 ), but is not limited thereto.As illustrated in FIG. 3, the thermal insulator 119 may be disposed between the plurality of battery cells 110. The thermal insulator 119 may be disposed between each of the plurality of battery cells 110. Alternatively, the heat insulating member 119 may be disposed between the battery groups BG in which the adjacent battery cells 110 are grouped in the predetermined number of groups.The battery group BG refers to a set of battery cells in which the adjacent battery cells 110 of the plurality of battery cells 110 are grouped into the predetermined number of groups. The plurality of battery cells 110 may be grouped into the predetermined number of groups for a predetermined target voltage or current, and then the battery groups BG may be connected in series or in parallel using the bus bar 170.The length of the buffer member 117 toward the first bus bar frame 151 and the second bus bar frame 152 is less than or equal to the length of the main body 115 in FIG. 3 (see FIG. 1 ), but is not limited thereto.On the other hand, in FIG. 3, the heat insulating member 119 and the buffer member 117 are illustrated as being separated. However, as described above, the heat insulating member 119 and the buffer member 117 may be formed as one member and may be referred to as an insert member (not illustrated).That is, the insert member may be located between the plurality of battery cells 110 to buffer the surface pressure of the battery cell during thermal runaway and inflation.The length of the heat insulating member 119 in the direction from the first bus bar frame 151 to the second bus bar frame 152 may be greater than the length of the main body 115. More specifically, the thermal insulation member 119 may be in contact with the first bus bar assembly 1501 and the second bus bar assembly 1502. The thermal insulation element 119 may block or retard the propagation of heat or flames to other locations when a battery cell 110 thermally passes through.FIG. 4 is an example of the insert element 270 accommodated in the insertion space 288 according to the present disclosure, as viewed from above.Referring to FIG. 4, the battery assembly 200 according to the present disclosure includes the plurality of battery cells 110 stacked and arranged in the predetermined stacking direction, the accommodation case 210 accommodating the plurality of battery cells 110, the insertion space 288 formed between the plurality of battery cells 110 and the accommodation case 210 in the stacking direction, and the insertion member 270 arranged in the insertion space 288.As described above, the insertion space 288 may be formed between the plurality of battery cells 110 and the bus bar assembly 150 (or the bus bar 170). The insertion space 288 may be formed by connecting each of the lead strip portions 111 and 112 to the bus bar assembly 150 (or the bus bar 170).The insertion space 288 may include a plurality of separation spaces 2889 separated by the line strip portions 111 and 112. Each of the lead strip portions 111 and 112 does not separate the plurality of separation spaces 2889 so as to be insulated. That is, since the length of each of the lead strip portions 111 and 112 is smaller than the height of the accommodation space 280 in the height direction of the accommodation case 210, only at least a part of the plurality of separation spaces 2889 is separated in the height of the accommodation space 280.That is, since the length of each of the wiring strip portions 111 and 112 in the height direction of the accommodation case 210 is smaller than the length of each main body 115, the plurality of insertion spaces 288 may be separated by each of the wiring strip portions 111 and 112 or may be communicated with each other.More specifically, the plurality of first insertion spaces 2881 may be formed by the first wiring strip portion 111, and the plurality of first insertion spaces 2881 may communicate with each other. Similarly, the plurality of second insertion spaces 2882 may be formed by the second wiring strip portion 112, and the plurality of second insertion spaces 2882 may communicate with each other.Therefore, as described above, the plurality of separation spaces 2889 can communicate with each other. In addition, a plurality of insertion elements 270 may be provided, each of which is inserted into the plurality of separation spaces 2889.Meanwhile, as illustrated in FIG. 4, the battery assembly 200 may further include the thermal insulator 119 disposed between the plurality of battery cells 110. Alternatively, the battery assembly 200 may further include a heat insulator 119 disposed between the battery groups BG in which the plurality of battery cells 110 are grouped.As illustrated in FIG. 4, the thermal insulation member 119 may be provided side by side with the plurality of battery cells 110 to extend up to the bus bar assembly 150. More specifically, the heat insulating member 119 may extend to and be inserted into the bus bar frames 151, 152. The insert member 270 cannot be inserted into the space into which the heat insulating member 119 is inserted to prevent interference between the insert member 270 and the heat insulating member 119.The first insertion space 2881 may be separated by the first wiring strip portion 111. Moreover, the second insertion space 2882 may be separated by the second wiring strip portion 112. However, when the cell stack assembly 100 is accommodated in the accommodation body 219, the first insertion space 2881 and the second insertion space 2882 may communicate with each other because the lengths of the first tab portion 111 and the second tab portion 112 in the height direction of the accommodation case 210 or the accommodation body 219 are smaller than the height of the battery cell 110.Moreover, the first insertion space 2881 and the second insertion space 2882 may communicate with each other through a space between the plurality of battery cells 110 and the accommodation cover 215. Therefore, the first insertion space 2881 and the second insertion space 2882 can communicate with each other and are not separated and isolated from each other.The insert element 270 may be located in at least one of the two insert spaces 2881 and 2882.The insertion member 270 includes a support body 271 that forms therein a buffer space 273 and extends in the height direction of the accommodating case 210 (see FIG. 5A ), and a rib portion 275 that extends in the height direction of the accommodating case 210 and divides the buffer space 273 into a plurality of divided spaces 273 aand 273 b(see FIGS. 5A to 7 ).In FIG. 4, the rib portion 275 shows a part of the buffer space 273 in a hexagonal shape (e.g., a honeycomb structure). More specifically, a virtual cross section of the divided spaces 273 aand 273 bdivided by the rib portion 275 at a predetermined height of the accommodating case 210 may have a hexagonal shape. This is only an example and may be changed in various ways.The interposer 270 may be located in the insertion space 288 to delay propagation of flames or heat to other adjacent battery cells 110 through the insertion space 228 during thermal cycling of one of the battery cells 110. When the insertion space 288 is a void, the insertion space 288 may be a passage for the propagation of flames or high temperature gases. Therefore, the insert member 270 may be inserted into the insertion space 288 to effectively minimize or prevent the propagation of flames or high temperature gas.Moreover, the insert member 270 may include a refractory material to minimize flame or high temperature gas propagation.Therefore, the melting point of the interposer 270 may be higher than the ignition points of the plurality of battery cells 110. The ignition points of the plurality of battery cells 110 may be a temperature at which venting occurs in the battery cell 110. Alternatively, the ignition points may be a temperature of the electrolyte housed in the battery cell 110, i.e., inside the main body 115, when the exterior material (or the housing case) of the battery cell 110 is torn or opened in a thermal runaway situation.When one of the battery cells 110 thermally passes through, the exterior material may be ruptured or opened to release high temperature gas or flames from the interior of the battery cell 110. Nevertheless, the insert member 270 may maintain its original shape to prevent the insert member 270 from burning or melting. Moreover, the shape of the insertion space 288 may be changed due to the expansion (or swelling) of one of the battery cells 110. According to the change in the shape of the insert space 288, the shape of the insert element 270 may also be changed to maintain the effect of filling the insert space 288. For this purpose, the insert element 270 may include a flexible material.As described above, even if the battery cell 110 in the insertion member 270 thermally passes through, the insertion member 270 cannot burn or melt, and the outer shape of the insertion member 270 can be maintained without substantial change.The insert member 270 may include a porous material. The porous material may contain pores in the interior. The shape of the pores may be irregular and unstructured. Preferably, the porosity of the insert member 270 may be 20% or more and 30% or less.The refractory material can also be an inorganic compound. That is, the insert member 270 may include a refractory material formed of an inorganic compound. The inorganic compound may be any compound selected from the group consisting of alum (K 2 SO 4 ·Al 2( SO 4)3 ·24H 2 O), borax (Na 2 B 4 O 7 ·10H 2 O), lime water (aqueous solution of Ca(OH) 2), burnt lime (CaO), white emulsion prepared by mixing lime milk Ca(OH)2with water, hydrated lime (Ca(OH)2), Washing soil (Na 2 CO 3 ·10H 2 O), apatite (Ca 3( PO 4)3 OH), baking powder (a salt mixture of NaHCO 3 and tartaric acid), soda (NaHCO 3), sodium thiosulfate pentahydrate (Na 2 S 2 O 3 ·5H2O), silica (or SiO2), alumina (or Al2O3), calcium oxide (CaO), Calcium sulfate (CaSO 4), calcium chloride (CaCl 2), sodium carbonate (Na 2 CO 3), potassium chloride (KCl), magnesium oxide (MgO), ZrO 2, chromium oxide (Cr 2 O 3), aluminum hydroxide (Al(OH) 3), antimony trioxide (Sb 2 O 3), antimonyl oxide (Sb2O3), oxide, magnesium hydroxide (Mg(OH)2), and a zinc borate compound, a phosphorus-based compound, a nitrogen-based guanidine compound or a molybdenum compound or a mixture thereof.In an embodiment, the insert member 270 may include silicon dioxide (silica). Given the melting point of silicon dioxide (1713° C.), the interposer 270 may minimize the spread of heat or exhaust gases generated during thermal runaway to other locations. Moreover, the shape of the insert member 270 may remain unchanged during the thermal runaway of the battery cell 100.In another embodiment, the interposer 270 may include silica gel. The silica gel may contain a porous material in powder form prepared by treating an aqueous solution of sodium silicate (Na 2 SiO 3) with an acid. More specifically, the silica gel can be obtained by mixing sodium silicate and an aqueous solution of an inorganic acid (e.g., sulfuric acid) to form a silica hydrosol and curing the hydrosol with a hydrogel. In view of the conventional method of silica gel described above, the main component (component which is 50% or more) of the silica gel is silica, and other components may further comprise alumina, iron(III) oxide(Fe 2 O 3, iron(III) oxide or ferric oxide), or sodium. Therefore, the melting point of the silica gel may be about 1600° C. or more.Preferably, the silica gel may contain 90% or more of silica. In addition, since the silica gel contains a porous material, the porosity of the insert member 270 may be 20% or more and 30% or less.Moreover, the insert member 270 may include an aerogel because aerogels not only have low thermal conductivity but also have a property of storing moisture and expanding in a high humidity environment.In view of the fact that the insert member 270 contains a refractory material such as silica gel, alumina gel, or aerogel, the insert member 270 may also contain silica (SiO 2).In addition to silica gel, the insert member 270 may also contain any other material as long as it is porous and flame retardant (heat resistant or fire resistant). Moreover, the insert member 270 may include not only a single material but also various refractory materials.In another embodiment, the interposer 270 may refer to a polymeric material evaluated as V-0 in the 94V (Vertical Burning) test of the UL (Underwriter's Laboratory), a flame retardant standard for polymeric materials.In particular, the insert member 270 may include a flame retardant polymer. The above flame retardant materials include phosphorus-based, halogen-based, and inorganic flame retardants, and in the case of phosphorus-based flame retardants, a phosphate compound, a phosphonate compound, a phosphinot compound, a phosphine oxide compound, and a phosphazene compound may preferably be contained, as well as metal salts thereof. They may be used singly or in combination of two or more kinds.In another specific embodiment, the phosphorus-based flame retardant may be, without limitation, diphenyl phosphate, diaryl phosphate, triphenyl phosphate, tricresyl phosphate, trixyrenyl phosphate, tri-(2,6-dimethylphenyl) phosphate, tri-(2,4,6-trimethylphenyl) phosphate, tri-(2,4-di-tert-butylphenyl) phosphate, tri-(2,6-dimethylphenyl) phosphate, bisphenol A bis (diphenyl phosphate), resorcinol bis (diphenyl phosphate), resorcinol bis [bis (2,6-dimethylphenyl) phosphate], resorcinol bis [bith (2,4-di-tert-butylphenyl) phosphate], hydroquinone bis [bith (2,6-dimethylphenyl) phosphate]. They may be used alone or in the form of a mixture of two or more.FIGS. 5A and 5B each show an example of the insert element 270.As described above, the insertion space 288 may be formed between the lead strip portions of the plurality of battery cells 110. In other words, the insertion space 288 may be located between the plurality of battery cells 110 and the bus bar 170. The insert element 270 may be disposed in the insert space 288.Referring to FIG. 5A, the insertion member 270 includes the support body 271 that forms the buffer space 273 therein and extends in the height direction of the accommodating case 210, and the rib portion 275 that extends in the height direction of the accommodating case 210 and divides the buffer space 273 into the plurality of divided spaces 273 aand 273 b.Moreover, the support body 271 may include a body inner surface 2719 forming an inner surface of the buffer space 273, and the rib portion 275 may include a first rib 2751 protruding from a part of the body inner surface 2719 and crossing the buffer space 273 to be connected to another side of the body inner surface 2719.That is, the support body 271 may have the shape of a tube. Therefore, the inside of the support body 271 may be a cavity, and the cavity may be referred to as a buffer space 273. When the battery cell 110 is changed, the support body 271 may also be changed. The cavity can prevent the destruction of the support body 271 and perform a buffer function.The cross section of the tubular shape may be rectangular or round. Various types of tubes can be accepted, and the insertion space 288 can be filled better.In FIG. 5B, an example of a virtual cross section of the support body 271 having a rectangular shape in a direction perpendicular to the height direction of the housing 210 is illustrated. The support body 271 may include a first surface 2711, a second surface 2712, a third surface 2713, and a fourth surface 2714 that form side surfaces of the buffer space 273 in the height direction of the accommodation case 210.Meanwhile, the opposite ends of the support body 271 may be opened in the height direction of the accommodating case 210. Moreover, the rib portion 275 may extend lower than the lower end 2759 of the support body 271, so that the support body 271 may be more stably supported on the body bottom surface 2194, when all lower edges of the support body 272 contact the body bottom surface 2194.The body inner side surface 2719 may refer to an inner side surface of the support body 271 that forms an outer shape and faces the buffer space 273.The rib portion 275 may protrude from one side of the body inner surface 2719 and may be connected to the other side of the body inner surface 2719. Referring to FIG. 5B, the rib portion 275 may divide the buffer space 273 into a plurality of divided spaces 273 aand 273 bcrossing the buffer space 273.More specifically, the rib portion 275 may connect the second surface 2712 and the first surface 2711 opposing the second surface 2713 to divide the buffer space 273 into a plurality of divided spaces 273 aand 273 b. However, this is only an example, and when the rib portion 275 partitions the buffer space 273, the other surface may be connected to another surface.Referring to FIG. 5B, the fin portion 275 may include the first fin 2751 extending parallel to the line strip portions 111 and 112. Alternatively, the first rib 2751 may be arranged in a direction perpendicular to the tab portions 111 and 112, or the first rib 2751 may be arranged in the stacking direction of the plurality of battery cells 110. When the battery cell 110 is modified, the insertion member 270 is not moved to another position or destroyed, and the insertion space 288 may be filled, the rib portion 275 may be disposed in any direction.The support body 271 and the rib portion 275 may be formed integrally. However, the support body 271 and the rib portion 275 may include different materials.Referring to FIG. 5B, the support body 271 may include a first body layer 271 bthat forms an inner surface of the buffer space 273 and is connected to at least a part of the rib portion 275, and a second body layer 271 athat surrounds the first body layer 271 band forms an outer surface of the support body 272. The first body layer 271 band the second body layer 271 amay include different materials such that the interposer 270 may delay the propagation of high temperature gas or flame through the interposer space 288.For example, the second body layer 271 amay include polyurethane foam and the first body layer 271 bmay include aerogel. Other examples of the inserting member 270 are not separately shown for the explanation, and unlike the inserting member 270 shown in Figs. 6 to 9, the supporting body 271 may be formed of a plurality of layers.FIGS. 6A and 6B show another example of the insert element 270.Referring to FIG. 6A, the rib portion 275 may include the first rib 2751 protruding from one side of the body inner surface 2719, crossing the buffer space 273, and being connected to the other side of the body outer surface 2719, and the second rib 2752 extending in a direction inclined or perpendicular to the first rib 2752 and being connected to the first rib 2751 or the body inner surface 2719.The cross section of the tubular shape may be rectangular or circular. Different tube types can be accepted, with the insertion space 288 being filled better.In FIG. 6B, an example of a virtual cross section of the support body 271 having a rectangular shape in the direction perpendicular to the height direction of the housing case 210 is illustrated.Opposite ends of the support body 271 may be opened in the height direction of the accommodation case 210. Moreover, the rib portion 275 may extend deeper than the lower end 2759 of the support body 271, so that the support body 271 rests more stably on the body bottom surface 2194 when all lower edges of the support body 272 contact the body bottom surface 2104.The rib portion 275 may protrude from one side of the body inner surface 2719 and may be connected to the other side of the body inner surface 2719. Referring to FIG. 6B, the rib portion 275 may divide the buffer space 273 into a plurality of divided spaces 273 aand 273 bcrossing the buffer space 273.That is, the rib portion 275 may include the first rib 2751 disposed parallel to the wiring strip portions 111 and 112 and the second rib 2752 vertically or obliquely connected to the first rib 2752 or the body inner surface 2719, thereby dividing the buffer space 273 into divided spaces 273 aand 273 bwith different sizes.To this end, the first rib 2751 and the second rib 2752 may include a plurality of first ribs 2751 and a plurality of second ribs 2752, respectively, and the plurality of second ribs 2752 may connect between the plurality of first ribs 2151 or between the plurality of first ribs 2151 and the body inner surface 2719.FIGS. 7A and 7B each show another example of the insert element 270.Referring to FIG. 7A, the rib portion 275 may include the first rib 2751 protruding from one side of the body inner surface 2719 and crossing the buffer space 273 to be connected to the other side of the body inner surface 2719, and the second rib 2752 connected to the first rib 2752 or the body inner surface 2719. Specifically, the second rib 2752 may include the first intersecting rib 2752 aand the second intersecting rib 2752 bwhich cross and are connected to each other.The cross section of the tubular shape may be rectangular or circular. Different tube types can be accepted, with the insertion space 288 being filled better.FIG. 7B illustrates an example in which a virtual cross section of the support body 271 in the direction perpendicular to the height direction of the accommodating case 210 has a rectangular shape.The rib portion 275 may protrude from one side of the body inner surface 2719 and may be connected to the other side of the body inner surface 2719. Referring to FIG. 7B, the rib portion 275 may divide the buffer space 273 into a plurality of divided spaces 273 aand 273 bcrossing the buffer space 273.That is, the rib portion 275 may include the first rib 2751 disposed parallel to the wiring strip portions 111 and 112 and the first intersecting rib 2752 aand the second intersecting rib 2752 bconnected vertically or obliquely to the first rib 2752 or the body inner surface 2719 and intersecting each other, thereby dividing the buffer space 273 into divided spaces 273 aand 273 bwith different sizes.To this end, the first rib 2751, the first intersecting rib 2752a, and the second intersecting rib 2752b may include a plurality of first ribs 2751, a plurality of first intersecting ribs 2752a, and a plurality of second intersecting ribs 2752b, respectively. The first intersecting rib 2752 aand the second intersecting rib 2752 bmay connect between the plurality of first ribs 2751 or between the plurality of first ribs 2751 and the body inner surface 2719.In addition, the intersection of the first intersecting rib 2752 aand the second intersecting rib 2752 bmay be located between the plurality of first ribs 2751 or between the plurality of first ribs 2751 and the body inner surface 2719 to effectively resist modification of the insert member 270 between the plurality of first ribs 2751 and between the plurality of first ribs 2751 and the body inner surface 2719 by the first intersecting ribs 2752 aand the second intersecting rib 2752 b.FIG. 8 is a comparison of an example of the shape of the insert member 270 before and after the swelling of the battery cell 110.In a situation where the plurality of battery cells 110 are normally operating, the insertion member 270 may be disposed in the insertion space 288 while maintaining a rectangular shape in plan view. In contrast, the battery cell 110 in which the thermal runaway has occurred may expand (or swell) when thermal runaway occurs in at least one battery cell 110 of the plurality of battery cells 110. Therefore, when the battery cell 110 expands, the shape of the insert member 270 may also change. FIG. 8 shows a state in which the areas of the lead strip portions 111 and 112 in the battery cell 110 in which thermal runaway occurs are widened.High temperature gas or flame may be released into the insertion space 288, or the shape of the insertion space 228 may change due to swelling of the battery cell 110. Therefore, the shape of the insert element 270 inserted into the insertion space 288 can also be changed. For this purpose, the insert element 270 may include a flexible material. In order to suppress the change of the battery cell 110, the rib portion 275 itself may be bent, so that the insert member 270 may be changed while supporting the insert member 270.In contrast to the examples shown in FIGS. 5 to 7, FIG. 8 shows an example in which the first ribs 2751 are arranged in the stacking direction. As a result, the first fin 2751 and the second fin 2752 are also modified according to the modification of the battery cell 110 in which the thermal runaway occurs in the directions of the lead strip portions 111 and 112. Accordingly, the first rib 2751 and the second rib 2752 can resist the external force caused by the modification of the battery cell 110. Therefore, the insert member 270 can be fitted into the insertion space 288 in a manner similar to a press-fit method. That is, the insertion member 270 may remain in the original insertion position while only the shape is changed.Referring to FIG. 8, the first rib 2751 may include a plurality of first ribs 2751. The plurality of first ribs 2751 may include a proximal first rib 2751 athat is closer to the main body 115 than the bus bar 170 and a distal first rib 2752 dthat is closer to the bus bar 170 than the main body 115. In FIG. 8, a total of four of the first ribs 2751 a, 2751 b, 2751 c, and 2751 dare illustrated, but the present disclosure is not limited thereto.Referring to FIG. 8, of the body inner surfaces 2719, the body inner surface adjacent to the proximal first rib 2751 amay contact the proximal first rib 2751 aand be formed into the same shape, but the body inner surface adjacent to the distal first rib 2752 dand the body inner side surface 2719 may hardly be changed.That is, when the battery cell 110 is changed, the proximal first rib 2751 amay be changed more than the distal first rib 2752 d. The shape change characteristics may be transferred to the second rib 2752.FIG. 9 is a comparison of another example of the shape of the insert member 270 before and after the swelling of the battery cell 110.As shown in FIG. 8, high temperature gas or flame may be released into the insertion space 288, or the shape of the insertion space 228 may be changed due to swelling of the battery cell 110. Therefore, the shape of the insert element 270 inserted into the insertion space 288 can also be changed. For this purpose, the insert element 270 may include a flexible material. In order to suppress the change of the battery cell 110, the rib portion 275 itself may be bent, so that the insert member 270 may be changed while supporting the insert member 270.FIG. 9 shows an example in which the first ribs 2751 are arranged in the stacking direction. As a result, the first rib 2751, the first intersecting rib 2752a, and the second intersecting rib 2752b are also modified according to the modification of the battery cell 110 in which the thermal runaway occurs in the directions of the tab portions 111 and 112, and the first rib 2751, the first intersecting rib 2752a, and the second intersecting rib 2752b can resist the external force caused by the modification of the above battery cell 110. Therefore, the insert member 270 can be fitted into the insertion space 288 in a manner similar to a tight fit method. That is, the insertion element 270 may be placed at the original insertion position while only the shape is changed.Referring to FIG. 9, the first rib 2751 may include a plurality of first ribs 2751. The plurality of first ribs 2751 may include the proximal first rib 2751 aarranged closer to the main body 115 than the bus bar 170 and the distal first rib 2752 darranged closer to the bus bar 170 than the main body 115. In FIG. 9, a total of four of the first ribs 2751 a, 2751 b, 2751 c, and 2751 dare illustrated, but the present disclosure is not limited thereto.Referring to FIG. 9, of the body inner surfaces 2719, the body inner surface adjacent to the proximal first rib 2751 amay contact the proximal first rib 2751 aand be formed into the same shape, but the body inner surface adjacent to the distal first rib 2752 dand the body inner side surface 2719 may hardly be changed.That is, when the battery cell 110 is changed, the proximal first rib 2751 amay be changed more than the distal first rib 2752 d. The shape changing features may also be applied to the first intersecting rib 2752 aand the second rib 2752.FIG. 10 is a flowchart showing an example of an assembling process of the battery assembly 200 according to the present disclosure.Referring to FIG. 10, an assembly process of the battery assembly 200 according to the present disclosure may include a step S 110 of stacking the plurality of battery cells 110, a step S 200 of connecting the plurality of stacked battery cells 110 to a storage cover 215, a step S 400 of inserting the insertion member 270 including the rib portion 275 defining the buffer space 273 therein and dividing the buffer space 273 into the plurality of divided spaces 273 aand 273 b, into a portion of the insertion space 288 formed between the tab portions 111 and 112 of the plurality of battery cells 110, and a step S 500 of coupling the storage body 219 to the storage cover 215.The assembly process of the battery assembly 200 according to the present disclosure may include, after the step S 110 of stacking the plurality of battery cells 110, the step S 150 of assembling the bus bar assembly 150 electrically connected to the plurality of battery cells 110.The step S 110 of stacking the plurality of battery cells 110 and the step S 150 of assembling the bus bar assembly 150 may be collectively referred to as a step S 100 of assembling the cell stack assembly 100.Specifically, the step S 100 of assembling the cell stack assembly 100 may further include a stacking step (not illustrated) of stacking the plurality of battery cells 110 and the buffer member 117 and / or the heat insulating member 119 located between the plurality of battery cells 110 after the step S 110 of stacking the battery cells 110.Moreover, the step S 100 of assembling the cell stack assembly 100 may also include a step (not illustrated) of stacking the end plates 212 and 213 located at both ends of the plurality of battery cells 110 in the stacking direction in which the plurality of battery cells 110 are stacked.After the step S 100 of assembling the cell stack assembly 100, the assembling process of the battery assembly 200 according to the present disclosure may perform a step S 200 of connecting the accommodation cover 215 to the plurality of stacked battery cells 110 or the cell stack assembly 100. The receiving cover 215 may be mounted before mounting the receiving body 219 to protect the plurality of battery cells 110 since at least a portion of the bus bar assembly 150 is located above.The assembling process of the battery assembly 200 according to the present disclosure may include step S 200 of connecting the accommodation cover 215 to the cell stack assembly 100. The receiving cover 215 may be mounted prior to the mounting of the receiving body 219 to protect the bus bar assembly 150 facing the receiving cover 215 during the assembly process.The assembly process of the battery assembly 200 according to the present disclosure may perform a first inverting step S 300 in which the accommodation cover 215 and the plurality of battery cells 110 connected to the accommodation cover 225 are inverted. The receiving cover 215 may be located below the plurality of inductive battery cells 110 through the first inverting step S 300.The battery assembly 200 may be inverted to position the insertion member 270 in the insertion space 288. The assembled battery assembly 200 may be inverted to insert the insertion member 270 into the insertion space 288 because the insertion member 270 is difficult to insert from above due to the already connected receiving cover 215.In the assembly process of the battery assembly 200 according to the present disclosure, the step S 400 of inserting the insertion member 270 into the insertion space 288 may be performed after the first reversing step S 300.Thereafter, the assembling process of the battery assembly 200 according to the present disclosure may further include a step S 500 of connecting the accommodating body 219 to the accommodating cover 215.Specifically, the step S 500 of connecting the accommodating body 219 to the accommodating cover 215 may include a step S 510 of forming the heat sink 295 on the body bottom side 2194, and a step S 550 of connecting the accommodating body 219 to the inverted accommodating cover 215 and the cell stack assembly 100.The heat sink 295 may be in contact with the cell stack assembly 100 when the cell stack assembly 100 is connected to the receptacle 219.After the accommodating body 219 and the accommodating cover 215 are joined, the assembling process of the battery assembly 200 according to the present disclosure may perform a second inverting step S 600 in which the accommodating cover 219 and the accommodating cover 215 are inverted.That is, in the battery assembly 200 inverted in the first inverting step S 300, the receiving cover 215 may be disposed above the receiving body 219 by the second inverting step S 600.Thereafter, the assembling process of the battery assembly 200 according to the present disclosure may perform a checking step S 700 of the battery assembly 200.FIG. 11 shows another example of a battery assembly 300 according to the present disclosure.Although the battery arrangement 200 described above is based on a battery arrangement, FIG. 11 shows a further example of a battery arrangement 300 in the form of a battery pack. That is, the battery array 200 may take the form of a CTP (Cell-to-Pack) structure in which the plurality of battery cells 110 are accommodated in a pack without a module and the battery array is omitted.The battery array 300 may include the plurality of battery cells 110 stacked and arranged in the predetermined stacking direction, a housing case 310 that houses the plurality of battery cells, an insertion space 388 formed between the plurality of battery cells 110 and the housing case in the stacking direction, and the insertion member (not illustrated) located in the insertion space 388.The insertion member 270 (see FIGS. 5 to 7 ) may include the support body 271 that forms the buffer space 273 therein and extends in the height direction of the accommodating case 310, and the rib portion 275 that extends in the height direction of the accommodating case 310 and divides the buffer space 273 into a plurality of divided spaces.The accommodating case 310 may include an accommodating body 311 for accommodating the plurality of battery cells 110 and an accommodating cover (not illustrated) connected to the accommodating body 311. Moreover, the accommodating case 310 may include a partition wall 330 partitioning the insertion space 388.The partition wall 330 may further include a first frame 333 and a second frame 335 that horizontally and vertically partition the plurality of battery cells 110. The first frame 333 and the second frame 335 may prevent a change of the accommodating body 311, but may also support and separate the plurality of battery cells 110.Since the present disclosure may be implemented in various forms, the scope of the rights is not limited to the embodiments described above. Therefore, when the modified embodiment includes the features of the claims of the present disclosure, it should be considered to fall within the scope of the present disclosure.Some of the aspects of the present disclosure are as follows:Aspect 1: A battery assembly (200, 300) comprising:a plurality of battery cells (110) stacked and arranged in a predetermined stacking direction;a receiving housing (210, 310) receiving the plurality of battery cells (110);an insertion space (288, 388) formed between the plurality of battery cells (110) and the accommodation case (210, 310) in the stacking direction; andan insertion member (270) located in the insertion space (288, 388) extends in a height direction of the accommodating case (210, 310) and includes a buffer space (273) therein.Aspect 2: The battery assembly (200, 300) of Aspect 1, wherein each of the plurality of battery cells (110) comprises:a main body (115) including an electrode assembly that generates or stores electrical energy; anda lead strip portion (111, 112) connected to the electrode assembly and protruding outward from the main body (115); andwherein the insertion space (288, 388) is formed between lead strip portions (111, 112) of the plurality of battery cells (110).Aspect 3: The battery assembly (200, 300) of Aspect 2, further comprising:a bus bar (170) electrically connected to the plurality of battery cells (110),wherein the insertion space (288, 388) is formed by the main body (115) of each of the plurality of battery cells (110), the lead strip portion (111, 112) of each of the plurality of battery cells (110), and the bus bar (170).Aspect 4: The battery assembly (200, 300) according to any one of aspects 1 to 3, wherein the insertion member (270) comprises:a support body (271) forming the buffer space (273); anda rib portion (275) that divides the buffer space (273) into a plurality of divided spaces.Aspect 5: The battery assembly (200, 300) according to Aspect 4, wherein the support body (271) includes a body inner surface (2719) that forms an inner surface of the buffer space (273), and wherein the rib portion (275) includes a first rib (2751) that protrudes from a portion of the body inner surface (2719), extends over the buffer space (273), and is connected to another side of the body inner surface (2719).Aspect 6: The battery assembly (200, 300) according to Aspect 5, wherein the rib portion (275) further includes a second rib (2752) extending in a direction oblique or perpendicular to the first rib (2751) and connected to the first rib (2751) or the body inner surface (2719).Aspect 7: The battery assembly (200, 300) according to Aspect 6, wherein the first rib (2751) and the second rib (2752) include a plurality of first ribs (2751) and a plurality of second ribs (2752), respectively, and wherein the plurality of second ribs (2752) connect between the plurality of first ribs (2751) or between the plurality of first ribs (2751) and the body inner surface (2719).Aspect 8: The battery assembly (200, 300) according to any one of Aspects 5 to 7, wherein each of both ends of the first rib (2751) is branched and connected to the body inner surface (2719).Aspect 9: The battery assembly (200, 300) according to Aspect 8, wherein the rib portion (275) includes a first intersecting rib (2752a) and a second intersecting rib (2752b) intersecting each other and connected to the first rib (2751) or the body inner surface (2719).Aspect 10: The battery assembly (200, 300) according to Aspect 9, wherein the first rib (2751), the first intersecting rib (2752a), and the second intersecting rib (2752b) include a plurality of first ribs (2751), a plurality of first intersecting ribs (2752a), and a plurality of second intersecting ribs (2752b), respectively, and wherein the plurality of first intersecting ribs (2752a) and the plurality of second intersecting ribs (2752b) are disposed between the plurality of first ribs (2751) or between the plurality of first ribs (2751) and the body inner surface (2719).Aspect 11: The battery assembly (200, 300) according to Aspect 10, wherein an intersection of the first intersecting rib (2752a) and the second intersecting rib (2752b) is disposed between the plurality of first ribs (2751) or between the plurality of first ribs (2751) and the body inner surface (2719).Aspect 12: The battery assembly (200, 300) according to any one of Aspects 5 to 11, wherein the first rib (2751) is arranged in the stacking direction.Aspect 13: The battery assembly (200, 300) according to any one of Aspects 4 to 11, wherein the support body (271) has a tubular shape in which both ends in the height direction of the accommodation case (210, 310) are open.Aspect 14: The battery assembly (200, 300) according to Aspect 13, wherein the rib portion (275) extends in the height direction of the accommodation case (210, 310) such that the rib portion (275) is located below a lower end of the support body (271).Aspect 15: The battery assembly (200, 300) according to any one of Aspects 4 to 11, wherein the support body (271) comprises:a first body layer (271b) forming an inner surface of the buffer space (273) and connected to at least a part of the rib portion (275); anda second body layer ( 271 a) surrounding the first body layer ( 271 b) and forming an outer side surface of the support body ( 271).Aspect 16: The battery assembly (200, 300) according to Aspect 15, wherein the first body layer (271b) and the second body layer (271a) include materials different from each other.Aspect 17: The battery assembly (200, 300) of any of aspects 1 to 16, wherein the insert member (270) includes a refractory material.The present disclosure may be embodied in various forms and is not limited to the above-described embodiments. Thus, when a modified embodiment includes a part of the claims of the present disclosure, it should be considered to fall within the scope of the present disclosure.

Claims

A battery assembly (200, 300) comprising: a plurality of battery cells (110) stacked and arranged in a predetermined stacking direction; a storage case (210, 310) storing the plurality of battery cells (110); an insertion space (288, 388) formed between the plurality of battery cells (110) and the storage case (210, 310) in the stacking direction; and an insertion member (270) located in the insertion space (288, 388) extends in a height direction of the storage case (210, 310) and includes a buffer space (273) therein.The battery assembly (200, 300) according to claim 1, wherein each of the plurality of battery cells (110) comprises: a main body (115) including an electrode assembly that generates or stores electric energy; and a lead strip portion (111, 112) connected to the electrode assembly and protruding outward from the main body (115), and wherein the insertion space (288, 388) is formed between lead strip portions (111, 112) of the plurality of battery cells (110).The battery assembly (200, 300) of claim 2, further comprising: a bus bar (170) electrically connected to the plurality of battery cells (110), wherein the insertion space (288, 388) is formed by the main body (115) of each of the plurality of battery cells (110), the lead tab portion (111, 112) of each of the plurality of battery cells (110), and the bus bar (170).The battery assembly (200, 300) according to any one of claims 1 to 3, wherein the insertion member (270) comprises: a support body (271) forming the buffer space (273); and a rib portion (275) dividing the buffer space (273) into a plurality of divided spaces.The battery assembly (200, 300) of claim 4, wherein the support body (271) includes a body inner surface (2719) that forms an inner surface of the buffer space (273), and wherein the rib portion (275) includes a first rib (2751) that protrudes from a portion of the body inner surface (2719), extends over the buffer space (273), and is connected to another side of the body inner surface (2719).The battery assembly (200, 300) of claim 5, wherein the rib portion (275) further includes a second rib (2752) extending in a direction inclined or perpendicular to the first rib (2751) and connected to the first rib (2751) or the body inner surface (2719).The battery assembly (200, 300) of claim 6, wherein the first rib (2751) and the second rib (2752) comprise a plurality of first ribs (2751) and a plurality of second ribs (2752), respectively, and wherein the plurality of second ribs (2752) connect between the plurality of first ribs (2751) or between the plurality of first ribs (2751) and the body interior surface (2719).The battery assembly (200, 300) according to any one of claims 5 to 7, wherein each of both ends of the first rib (2751) is branched and connected to the body inner surface (2719).The battery assembly (200, 300) according to claim 8, wherein the rib portion (275) includes a first intersecting rib (2752a) and a second intersecting rib (2752b) intersecting each other and connected to the first rib (2751) or the body inner surface (2719).The battery assembly (200, 300) of claim 9, wherein the first rib (2751), the first intersecting rib (2752a), and the second intersecting rib (2752b) each include a plurality of first ribs (2751), a plurality of first intersecting ribs (2752a), and a plurality of second intersecting ribs (2752b), respectively, and wherein the plurality of first intersecting ribs (2752a) and the plurality of second intersecting ribs (2752b) are disposed between the plurality of first ribs (2751) or between the plurality of first ribs (2751) and the body inner surface (2719).The battery assembly (200, 300) of claim 10, wherein an intersection of the first intersecting rib (2752a) and the second intersecting rib (2752b) is disposed between the plurality of first ribs (2751) or between the plurality of first ribs (2751) and the body inner surface (2719).The battery assembly (200, 300) according to any one of claims 5 to 11, wherein the first rib (2751) is disposed in the stacking direction.The battery assembly (200, 300) according to any one of claims 4 to 11, wherein the support body (271) has a tubular shape in which both ends in the height direction of the accommodation case (210, 310) are open.The battery assembly (200, 300) according to claim 13, wherein the rib portion (275) extends in the height direction of the accommodation case (210, 310) such that the rib portion (275) is located below a lower end of the support body (271).The battery assembly (200, 300) according to any one of claims 4 to 11, wherein the support body (271) comprises: a first body layer (271b) that forms an inner surface of the buffer space (273) and is connected to at least a part of the rib portion (275); and a second body layer (271a) that surrounds the first body layer (271b) and forms an outer side surface of the support body (271).The battery assembly (200, 300) of claim 15, wherein the first body layer (271b) and the second body layer (271a) include materials different from each other.The battery assembly (200, 300) of any of claims 1 to 16, wherein the insert member (270) includes a refractory material.

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