Battery module and battery pack including same

Abstract

A battery module according to the present invention comprises: a battery cell stack in which a plurality of battery cells are stacked; a module case for accommodating the battery cell stack; a bus bar frame disposed on one side of the battery cell stack; and a plurality of heat blocking blocks disposed on one surface of the bus bar frame that faces the battery cells. The battery module and the pack, according to the present invention, have the effects of blocking or delaying the transfer of heat and particles to the bus bar during thermal runaway and preventing a short circuit of the bus bar.

Description

Battery module and battery pack including the same

[0001] The present invention relates to a battery module and a battery pack including the same, and more specifically, to a battery module that delays thermal transfer during thermal runaway and a battery pack including the same.

[0002] Unlike primary batteries, which cannot be recharged, secondary batteries refer to batteries capable of charging and discharging, and are applied not only to portable devices but also to electric vehicles (EVs) and hybrid electric vehicles (HEVs) driven by electric power sources.

[0003] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, or unit battery cells, is approximately 2.5V to 4.6V. Therefore, if a higher output voltage is required, a battery pack is formed by connecting multiple battery cells in series. Additionally, a battery pack is formed by connecting multiple battery cells in parallel depending on the charge / discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack can be varied depending on the required output voltage or charge / discharge capacity.

[0004] When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to first configure a battery module consisting of at least one battery cell, preferably multiple battery cells, and then use at least one such battery module to configure the battery pack by adding other components. Here, a battery module refers to a component in which multiple battery cells are connected in series or parallel, and a battery pack refers to a component in which multiple battery modules are connected in series or parallel to increase capacity and output.

[0005] In the event of thermal runaway in a battery module, heat transfer from one cell to an adjacent cell may occur, and heat and particles may be transferred from the cell to the busbar frame to which the electrode leads are connected. This can cause the busbar frame to melt and lead to a short circuit in the busbar.

[0006] The present invention aims to solve the problems described above by providing a battery module capable of blocking or delaying the transfer of heat and particles to the busbar during thermal runaway and preventing a short circuit of the busbar, and a battery pack including the same.

[0007] A battery module according to the present invention is characterized by comprising: a battery cell stack in which a plurality of battery cells are stacked; a module case for accommodating the battery cell stack; a busbar frame disposed on one side of the battery cell stack; and a plurality of heat-blocking blocks disposed on one surface of the busbar frame facing the battery cells.

[0008] In addition, the heat-blocking block is attached to the inner side of the busbar frame.

[0009] In addition, the above-mentioned heat-insulating block is made of a foam block.

[0010] In addition, the above-mentioned heat-blocking block is made of silicone.

[0011] In addition, a plurality of the above-mentioned heat-blocking blocks are spaced apart along the width direction of the battery module.

[0012] In addition, the heat-blocking block is placed between the electrode leads of two adjacent battery cells.

[0013] In addition, the end of the heat-blocking block is positioned between the cell terraces of two adjacent battery cells.

[0014] In addition, the heat-blocking block extends vertically from the inner side of the busbar frame.

[0015] In addition, the busbar frame is positioned on both sides of the battery cell stack, and a plurality of the heat-blocking blocks are each positioned on the busbar frame positioned on both sides of the battery cell stack.

[0016] In addition, the battery module of the present embodiment further includes a plurality of busbars disposed on the busbar frame.

[0017] In addition, the battery module of the present embodiment further includes one or more heat-insulating pads disposed between two adjacent battery cells.

[0018] The battery module and pack according to the present invention have the effect of blocking or delaying the transfer of heat and particles to the busbar during thermal runaway and preventing short circuits in the busbar.

[0019] FIG. 1 is a perspective view of a battery module according to an embodiment of the present invention, and

[0020] FIG. 2 is an exploded perspective view of a battery module according to an embodiment of the present invention, and

[0021] FIG. 3 is a perspective view of a battery cell in one embodiment of the present invention, and

[0022] FIG. 4 is a perspective view of a terminal busbar in one embodiment of the present invention, and

[0023] FIG. 5 is a perspective view of an insulating cover and an end plate in one embodiment of the present invention, and

[0024] FIG. 6 is a perspective view of a busbar frame, and

[0025] FIG. 7 is a drawing showing busbar frames coupled to both sides of a battery cell stack in one embodiment of the present invention, and

[0026] FIG. 8 is a bottom view of FIG. 7, and

[0027] FIG. 9 is a partial detailed view of FIG. 8, and

[0028] FIG. 10 is a plan view of a busbar frame in one embodiment of the present invention, and

[0029] FIG. 11 is a drawing illustrating a battery pack in an embodiment of the present invention, and

[0030] FIG. 12 is a drawing illustrating a vehicle equipped with a battery pack in one embodiment of the present invention.

[0031] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components.

[0032] In drawings, thicknesses may be enlarged to clearly represent multiple layers and regions. Throughout the specification, the same reference numerals are used for similar parts. When a part such as a layer, film, region, or plate is described as being "above" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately above" another part, it means that there is no other part in between. Furthermore, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately below" another part, it means that there is no other part in between.

[0033] A battery module (1000) according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0034] FIG. 1 is a perspective view of a battery module according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a battery module according to an embodiment of the present invention, FIG. 3 is a perspective view of a battery cell according to an embodiment of the present invention, FIG. 4 is a perspective view of a terminal busbar according to an embodiment of the present invention, FIG. 5 is a perspective view of an insulating cover and an end plate according to an embodiment of the present invention, FIG. 6 is a perspective view of a busbar frame, FIG. 7 is a drawing showing busbar frames coupled to both sides of a battery cell stack according to an embodiment of the present invention, FIG. 8 is a bottom view of FIG. 7, FIG. 9 is a partial detail view of FIG. 8, FIG. 10 is a top view of a busbar frame according to an embodiment of the present invention, FIG. 11 is a drawing showing a battery pack according to an embodiment of the present invention, and FIG. 12 is a drawing showing a vehicle equipped with a battery pack according to an embodiment of the present invention.

[0035] A battery module (1000) according to one embodiment of the present invention may include a battery cell stack (100) in which a plurality of battery cells (110) are stacked, a module case (200) that accommodates the battery cell stack (100), a busbar frame (300) located on one side and / or the other side of the battery cell stack (100), an insulating cover (500) disposed on the outside of the busbar frame (300), and an end plate (400) disposed on the outside of the insulating cover (500).

[0036] The above battery cell stack (100) may be formed by stacking a plurality of battery cells (110) along one direction, and the plurality of battery cells (110) may be electrically connected. The direction in which the plurality of battery cells (110) are stacked may be the X-axis direction (or -X-axis direction) in FIG. 2.

[0037] The direction from the front to the rear of the battery cell stack (100), or the opposite direction, can be defined as the length direction of the battery cell stack (100) and may be the Y-axis direction in the drawing. Additionally, the direction from the top surface to the bottom surface of the battery cell stack (100), or the opposite direction, can be defined as the width direction of the battery cell stack (100) and may be the Z-axis direction in the drawing.

[0038] The longitudinal direction of the battery cell stack (100) may be substantially the same as the longitudinal direction of the battery cell (110). The electrode leads (111, 112) of the battery cell (110) may be located on the front and rear of the battery cell stack (100), and the busbars (310, 320) of the battery module (1000) may be positioned close to the front and rear of the battery cell stack (100) to facilitate electrical connection with the electrode leads (111, 112).

[0039] The battery cell (110) may be provided as a pouch-type battery cell, and the number of stacked pouch-type battery cells per unit area may be maximized. However, the battery cell (110) is not necessarily provided as a pouch type and may be provided as a prismatic, cylindrical, or various other shapes.

[0040] A battery cell (110) provided in a pouch form may include an electrode assembly and a cell case (115) that accommodates the electrode assembly (see FIG. 3).

[0041] The cell case (115) of the battery cell (110) is intended to accommodate an electrode assembly and may be a pouch-type cell case (115). The cell case (115) includes a lower case and an upper case covering the lower case, and the upper and lower cases may be formed as a single unit. Additionally, as shown in FIG. 3, the connecting portion of the upper and lower cases may be formed in a structure that is bent and folded. Also, as shown, the upper case may completely cover the lower case and a sealing portion (114) may be formed in the periphery.

[0042] Both the upper and lower cases may be formed as a laminate structure including an inner coating layer, a metal layer, and an outer coating layer. The inner coating layer is located on the inside of the cell case (115) relative to the metal layer and must have insulation and electrolytic resistance as it comes into direct contact with the electrode assembly. Additionally, for sealing from the outside, it is required to have excellent sealing strength, that is, the sealing portion where the inner layers are heat-bonded together must have excellent heat-bonding strength. The metal layer is located between the inner coating layer and the outer coating layer and serves as a barrier layer to prevent moisture or various gases from penetrating into the battery from the outside. A lightweight aluminum (Al) thin film with excellent formability can be used as a preferred material for the metal layer in contact with the inner coating layer. The outer coating layer is located on the outside of the cell case (115) relative to the metal layer. This outer coating layer may use a heat-resistant polymer with excellent tensile strength, moisture resistance, and air permeability resistance to protect the electrode assembly while ensuring heat resistance and chemical resistance; for example, nylon or polyethylene terephthalate may be used.

[0043] A receiving groove (116) may be formed in each of the upper and lower cases, and an electrode assembly may be housed in the receiving groove (116) of the upper and lower cases.

[0044] The electrode assembly housed in the cell case (115) may be one of the following: a jelly-roll type electrode assembly having a structure in which a separator is interposed between long sheet-type positive and negative electrodes and then wound; a stack type electrode assembly having a structure in which rectangular positive and negative electrodes are stacked with a separator interposed between them; a stack-folding type electrode assembly in which unit cells are wound by a long separator film; and a lamination-stack type electrode assembly in which unit cells are stacked with a separator interposed between them and attached to each other.

[0045] Additionally, the electrode assembly may include two electrode tabs and two electrode leads (111, 112) each connected to the electrode tabs by a weld.

[0046] One of the two electrode leads (111, 112) may be a positive lead connected to a positive tab, and the other electrode lead (111, 112) may be a negative lead connected to a negative tab.

[0047] A lead film (113) may be attached to each electrode lead (111, 112). The lead film (113) attached to the electrode leads (111, 112) is positioned between the electrode leads (111, 112) and the cell case (115) to prevent a short circuit from occurring between the electrode leads (111, 112) and the cell case (115) and to improve sealing power, thereby preventing leakage of the electrolyte.

[0048] Although the two electrode leads (111, 112) are shown as being placed on each side of the electrode assembly, they may be placed on only one side of the electrode assembly depending on the arrangement of the electrode tabs.

[0049] The above module case (200) may be for protecting the battery cell stack (100) and the electrical components connected thereto from external physical impact, and the module case (200) may accommodate the battery cell stack (100) and the electrical components connected thereto in the internal space of the module case (200).

[0050] The structure of the module case (200) can be varied, and for example, the structure of the module case (200) may be a monoframe structure. Here, the monoframe may be in the form of a metal plate with an integrated top surface, a bottom surface, and both sides. The monoframe may be manufactured by extrusion molding. As another example, the structure of the module case (200) may be a structure in which a U-shaped frame and an upper plate (top surface (201)) are combined. In the case of a structure in which a U-shaped frame and an upper plate are combined, the structure of the module case (200) may be formed by combining an upper plate to the upper side of a U-shaped frame, which is a metal plate with an integrated bottom surface and both sides, and each frame or plate may be manufactured by press molding. Additionally, the structure of the module case (200) may be provided as an L-shaped frame structure in addition to a monoframe or U-shaped frame, and may be provided as various structures not described in the above examples.

[0051] The structure of the module case (200) may be provided in an open form along the longitudinal direction of the battery cell stack (100). The front and rear of the battery cell stack (100) may not be covered by the module case (200). The electrode leads (111, 112) of the battery cell (110) may not be covered by the module case (200). The front and rear of the battery cell stack (100) may be covered by a busbar frame (300), end plate (400), or busbar (310, 320), etc., which will be described later, thereby protecting the front and rear of the battery cell stack (100) from external physical impacts.

[0052] A compression pad (150) may be located between one side of the inner surface of the battery cell stack (100) and the module case (200).

[0053] A compression pad (150) can be positioned in the battery cell stack (100) such that it faces the outermost battery cell (110) in the X-axis direction in the drawing.

[0054] Additionally, although not shown, a thermally conductive resin may be injected between the inner surface of the battery cell stack (100) and the module case (200), and a thermally conductive resin layer (not shown) may be formed between one of the inner surfaces of the battery cell stack (100) and the module case (200) by the injected thermally conductive resin. At this time, the thermally conductive resin layer may be located on the Z-axis of the battery cell stack (100), and the thermally conductive resin layer may be formed between the bottom surface located on the -Z-axis of the battery cell stack (100) and the module case (200).

[0055] The above busbar frame (300) is positioned on one side of the battery cell stack (100) to cover one side of the battery cell stack (100) and simultaneously guide the connection between the battery cell stack (100) and an external device. Specifically, the busbar frame (300) may be positioned on the front or rear side of the battery cell stack (100) as illustrated, or on the top, bottom, or side. At least one of a busbar (310, 320) and a module connector may be mounted on the busbar frame (300). As illustrated in FIG. 2, one side of the busbar frame (300) is connected to one side or the other side of the battery cell stack (100), and the other side of the busbar frame (300) may be connected to the busbar (310, 320).

[0056] The busbar frame (300) may include one or more busbar mounting brackets to which the busbars (310, 320) are coupled and mounted. The busbars (310, 320) may be mounted on the front surface of the busbar mounting bracket of the busbar frame (300), and a plurality of busbar mounting brackets may be spaced apart in the width direction of the battery module (1000).

[0057] The busbar frame (300) may include an electrically insulating material. The busbar frame (300) may restrict the busbar (310, 320) from contacting other parts of the battery cells (110) other than the part joined to the electrode leads (111, 112), and may prevent an electrical short circuit from occurring.

[0058] The busbar frame (300) may be located on one side and the other side of the battery cell stack (100), respectively.

[0059] The busbar (310, 320) is mounted on a busbar mounting bracket (340) on one side of the busbar frame (300) and may be for electrically connecting the battery cell stack (100) or battery cells (110) and an external device circuit. Multiple busbars (310, 320) may be arranged and positioned between the battery cell stack (100) or the busbar frame (300) and the end plate (400) to be protected from external impacts, etc., and the reduction in durability due to external moisture, etc., may be minimized.

[0060] The busbar (310, 320) can be electrically connected to the battery cell stack (100) through the electrode leads (111, 112) of the battery cell (110).

[0061] Specifically, the electrode leads (111, 112) of the battery cell (110) can be bent and connected to the bus bar (310, 320) after passing through a lead slit formed in the bus bar frame (300). The electrode leads (111, 112) of the battery cell (110) can be connected to both sides of the bus bar (310, 320), and the electrode lead (111) connected to one side of the bus bar (310, 320) can be a positive lead, and the electrode lead (112) connected to the other side of the bus bar (310, 320) can be a negative lead.

[0062] The battery cells (110) constituting the battery cell stack (100) can be connected in series or in parallel by the busbars (310, 320).

[0063] The busbar (310, 320) may include a terminal busbar (320) for electrically connecting one battery module (100) to another battery module (100). In order to be connected to another battery module (100), at least a portion of the terminal busbar (320) may be exposed to the outside of the end plate (400), and the end plate (400) may be provided with a terminal opening (410) for this purpose.

[0064] The terminal busbar (320) can have one end (second part (322)) exposed through the opening (510) of the insulating cover (500) and the terminal opening (410) of the end plate (400).

[0065] As illustrated in FIG. 4, the terminal busbar (320) may include a first portion (321) connected to the electrode leads (111, 112) of the battery cell (110) and a second portion (322) exposed to the outside through the terminal opening (410). Additionally, the terminal busbar (320) may further include a bending portion (323) formed between the first portion (321) and the second portion (322).

[0066] In the terminal busbar (320), the first part (321) can be connected to the second part (322) through the bending part (323), and one side of the first part (321) and one side of the second part (322) can be perpendicular to each other. That is, by forming a bent bending part (323) on the terminal busbar (320), the second part (322) can protrude and be seated on the seating part (530) of the insulating cover (500), and the second part (322) can be electrically connected to an inter busbar (not shown). A coupling hole (322a) is formed in the second part (322) constituting one end of the terminal busbar (320), and the second part (322) of the terminal busbar (320) can be fixed by a fixing pin (not shown) inserted into the coupling hole (322a).

[0067] The end plate (400) may be intended to protect the battery cell stack (100) and the electrical components connected thereto from external physical impact by covering the open side of the module case (200). To this end, the end plate (400) may be manufactured from a material having a certain strength, and for example, the end plate (400) may include a metal or plastic material such as aluminum.

[0068] A terminal opening (410) may be formed in the end plate (400). The terminal opening (410) may be positioned on each side of the end plate (400), and a portion of the insulating cover (500) and one end (second portion (322)) of the terminal busbar (320) may be exposed through the terminal opening (410).

[0069] And, a connector opening may be located between the terminal openings (410) located on both sides of the end plate (400), and a module connector may be exposed to the outside through the connector opening.

[0070] The end plate (400) can be combined with the module case (200) while covering the busbar frame (300) or busbar (310, 320) located on one side of the battery cell stack (100). Each corner of the end plate (400) can be combined with the corresponding corner of the module case (200) by means such as welding, bolt fastening, or hook fastening.

[0071] The end plate (400) can be positioned on one side and the other side of the module case (200) respectively to cover both sides of the battery cell stack (100). In this embodiment, an example is illustrated in which the end plate (400) is positioned on the front and back sides of the module case (200).

[0072] Additionally, an insulating cover (500) for electrical insulation may be positioned between the end plate (400) and the busbar frame (300). That is, the busbar frame (300), the insulating cover (500), and the end plate (400) may be positioned sequentially outward from the battery cell stack (100). Similar to the end plate (400), the busbar frame (300) and the insulating cover (500) may each be composed of multiple units.

[0073] The insulating cover (500) may include an electrical insulating material and may block the bus bar (310, 320) from contacting the end plate (400).

[0074] The insulating cover (500) may include an opening (510) and a seating portion (530). The opening (510) may be positioned on each of the upper sides of the insulating cover (500), and one end (second portion (322)) of the terminal busbar (320) may be exposed through the opening (510).

[0075] And, a connector opening may be located between the openings (510) located on both sides of the insulating cover (500), and a module connector may be exposed to the outside through the connector opening.

[0076] The insulating cover (500) may be located on the inner surface of the end plate (400) and may be in close contact with the inner surface of the end plate (400), but is not necessarily so.

[0077] As described above, one end (second part (322)) of the terminal busbar (320) can be exposed through the opening (510), and the exposed one end (second part (322)) of the terminal busbar (320) can be seated on the seating portion (530). Accordingly, the seating portion (530) can be positioned adjacent to the opening (510) and can be positioned on the upper outer surface.

[0078] A second part (322) of a terminal bus bar (320) can be seated on the upper surface of the seating portion (530), and thus the upper surface of the seating portion (530) can form a seating surface. Additionally, as shown in FIG. 5, the seating portion (530) may include a fixing member (531) for fixing the terminal bus bar (320).

[0079] The fixing member (531) can fix the second part (322) of the terminal bus bar (320) and may include a fixing hole (531a).

[0080] A fixing pin (not shown) may be inserted into the above fixing hole (531a). The fixing pin (not shown), which is inserted into the coupling hole (322a) formed in the second part (322) of the terminal busbar (320), is coupled to the fixing hole (531a) and fixed, thereby allowing the second part (322) of the terminal busbar (320) to be fixed to the insulating cover (500).

[0081] Accordingly, the second part (322) of the terminal busbar (320) is seated on the seating portion (530) of the insulating cover (500), and the second part (322) is seated on and comes into contact with a fixing member ((531) placed on the seating portion (530).

[0082] And, a terminal cover portion (not shown) covering one end (second portion (322)) of the exposed terminal busbar (320) can be placed on the insulating cover (500).

[0083] Meanwhile, as illustrated in FIGS. 6 to 10, the busbar frame (300) may include a heat-blocking block (330).

[0084] A heat-blocking block (330) may be placed on the inner surface facing the battery cell (110) or battery cell stack (100) from the busbar frame (300). A plurality of heat-blocking blocks (330) may be spaced apart along the width direction (X-axis direction) of the busbar frame (300) or battery module (1000). The heat-blocking block (330) may be attached to the inner surface facing the battery cell (110) from the busbar frame (300) and may be attached by a tape. The tape may be, for example, a silicon (Si) tape.

[0085] Each heat-blocking block (330) attached to the inner surface of the busbar frame (330) can be placed between battery cells. Specifically, each heat-blocking block (330) can be placed between the electrode leads (111, 112) of two adjacent battery cells (110) (see FIG. 9).

[0086] In FIG. 3, the cell case (115) of the pouch-type battery cell (110) may have a pair of long sides and a pair of short sides at the edge, and the pair of opposing short sides where the electrode leads (121, 122) are placed may be called cell terraces (115a).

[0087] The end of the heat block (330) in the busbar frame (300) can be extended to the cell terrace (115a), and thus, the end of the heat block (330) can be placed between the cell terraces (115a) of two adjacent battery cells (110) as shown in FIG. 9.

[0088] Each heat-blocking block (330) may be extended in the vertical direction, and the vertical length (Z-axis direction) of the heat-blocking block (330) may be similar to the vertical length of the battery cell (110) and may be greater than the vertical length of the battery cell (110). The length (Y-axis direction) of each heat-blocking block (330) protruding from the busbar frame (300) may be approximately 10 to 20 mm.

[0089] The heat block (330) is shown with a rectangular cross-section in a planar view, but is not limited to this and may have a cross-section of a different shape. The heat block (330) may be extended from the busbar frame (300) parallel to the longitudinal direction (Y-axis direction) of the battery module (1000) (longitudinal direction of the battery cell (110)) and may be extended obliquely at a certain angle, such as the left and right heat block (330).

[0090] In FIG. 8, the left and right heat block (330) is extended obliquely at a certain angle, thereby avoiding interference with the electrode leads (111, 112) that are extended obliquely from the left and right battery cells (110), and also avoiding interference with the cell terrace (115a) that is extended obliquely from the battery cells (110).

[0091] The heat block (330) may be made of a heat-resistant material or a fire-resistant material, and may be made of a material with low thermal conductivity.

[0092] The heat-blocking block (330) may be made of a foam block, a synthetic resin foam, or a silicone foam. The heat-blocking block (330) may, for example, contain silicone or be made of silicone. Additionally, the heat-blocking block (330) may be made of urethane foam, etc.

[0093] The heat block (330) can be placed on each of the busbar frames (300) positioned on both sides of the battery cell stack (100) as shown in FIGS. 7 and 8.

[0094] The number of heat-blocking blocks (330) of the busbar frame (300) arranged on both sides of the battery cell stack (100) may be the same or different.

[0095] In this way, by arranging the thermal block (330) of the foam block in the busbar frame (300), heat can be prevented from being transferred to the busbar frame (300) during thermal runaway, and accordingly, short circuits of the busbars (310, 320) can be prevented. In addition, by arranging the thermal block (330) of the foam block in the busbar frame (300), the gas during thermal runaway can be guided to proceed toward the tower direction rather than moving toward the busbar frame (300), and the fire resistance and insulation of the busbar frame (300) can be strengthened.

[0096] Meanwhile, in an embodiment of the present invention, a heat-blocking pad (190) may be placed between two adjacent battery cells as shown in FIG. 8.

[0097] Two or more heat-blocking pads (190) may be spaced apart along the width direction (X-axis direction) of the battery module (1000). The heat-blocking pads (190) may be extended along the length direction (Y-axis direction) of the battery module (1000), and their length may be greater than the length of the battery cell (110).

[0098] The heat-blocking pad (190) can be formed to cover a wide surface of the battery cell (110) shown in FIG. 3.

[0099] The heat-blocking pad (190) may be made of a heat-resistant or fire-resistant material, or may be made of a material with low thermal conductivity. The heat-blocking pad (190) may be, for example, a silicone pad.

[0100] The heat-blocking pad (190) can be placed between every two battery cells (110) and can also be placed between some battery cells (110).

[0101] In this way, by placing a heat-blocking pad (190) between two battery cells (110), heat transfer between adjacent battery cells can be delayed or prevented during thermal runaway.

[0102] One or more battery modules (1000) according to the present invention as described above can form a battery pack (2000). As shown in FIG. 11, a battery pack (2000) according to one embodiment of the present invention can accommodate at least one battery module (1000) inside a pack case (2100) and may include various control and protection systems such as a Battery Management System (BMS) and a cooling system.

[0103] The pack case (2100) may include a lower housing (2110) and an upper housing (not shown) coupled to the upper side of the lower housing (2110), and a plurality of battery modules (1000) may be stored in the internal space of the lower housing (2110) and the upper housing.

[0104] Meanwhile, in an embodiment of the present invention, an example is shown in which a plurality of battery modules (1000) are accommodated inside a battery pack (2000), but a plurality of battery cells (110) may also be directly disposed inside the battery pack (2000).

[0105] The battery module (1000) and battery pack (2000) according to the present invention configured in this manner can be applied to various devices. Specifically, they can be applied to means of transportation such as electric bicycles, electric vehicles (V), and hybrid vehicles, or to Energy Storage Systems (ESS), but are not limited thereto and can be applied to various devices capable of using secondary batteries.

[0106] FIG. 12 is a drawing illustrating an electric vehicle (V) equipped with a battery pack (2000). In the electric vehicle (V), the wheels are driven by a motor that receives power from the battery pack (2000), allowing the electric vehicle to operate.

[0107] Although the present invention has been described with reference to preferred embodiments as described above, it is not limited to the aforementioned embodiments, and various changes and modifications may be made by those skilled in the art within the scope of the invention without departing from the spirit of the invention.

[0108] The present invention can provide a battery module and a pack capable of blocking or delaying the transfer of heat and particles to the busbar during thermal runaway and preventing a short circuit of the busbar.

Claims

1. A battery cell stack in which multiple battery cells are stacked; A module case for accommodating the above battery cell stack; A busbar frame disposed on one side of the above-mentioned battery cell stack; and A plurality of heat-blocking blocks disposed on one side facing the battery cell in the above busbar frame; A battery module characterized by including 2. In Paragraph 1, The above heat-blocking block is a battery module attached to the inner side of the busbar frame.

3. In Paragraph 1, The above thermal insulation block is a battery module made of a foam block.

4. In Paragraph 1, The above-mentioned heat-blocking block is a battery module made of silicon.

5. In Paragraph 1, A plurality of the above-mentioned heat-blocking blocks are spaced apart along the width direction of the battery module.

6. In Paragraph 1, The above thermal block is a battery module placed between the electrode leads of two adjacent battery cells.

7. In Paragraph 6, The end of the above-mentioned heat-blocking block is a battery module positioned between the cell terraces of two adjacent battery cells.

8. In Paragraph 1, The above heat-blocking block is a battery module extending vertically from the inside of the busbar frame.

9. In Paragraph 1, The above busbar frame is positioned on both sides of the battery cell stack, and A plurality of the above-mentioned heat-blocking blocks are battery modules each disposed on the busbar frames disposed on both sides of the battery cell stack.

10. In Paragraph 1, A battery module further comprising a plurality of busbars disposed on the above-mentioned busbar frame.

11. In Paragraph 1, A battery module comprising one or more heat-insulating pads placed between two adjacent battery cells.

12. A battery pack comprising a plurality of battery modules according to paragraph 1.

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