Battery module and battery pack comprising same

Abstract

A battery module according to an embodiment of the present invention includes: 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 two insulation covers disposed on both sides of the battery cell stack, wherein one of the two insulation covers comprises a pressing pad, the other insulation cover is disposed on the outer side of the bus bar frame, and the pressing pad of the one insulation cover presses on the battery cell stack in the direction of the other insulation cover disposed on the outer side of the bus bar frame.

Description

Battery module and battery pack including same

[0001] The present invention relates to a battery module and a battery pack including the same, and more particularly, to a battery module in which the hole position of a terminal bus bar in the battery module is improved, and a battery pack including the same.

[0002] Secondary batteries, unlike primary batteries that cannot be recharged, are batteries that can be charged and discharged. They are used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) that are driven by electrical power sources.

[0003] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, i.e., unit battery cells, is approximately 2.5 V to 4.6 V. Therefore, when a higher output voltage is required, multiple battery cells are connected in series to form a battery pack. Furthermore, depending on the charge / discharge capacity required for the battery pack, multiple battery cells are connected in parallel to form a battery pack. Therefore, the number of battery cells included in the battery pack can be set in various ways 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 to first configure a battery module comprising at least one battery cell, preferably multiple battery cells, and then use at least one such battery module and add other components to configure the battery pack. 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, etc.

[0005] In a battery module, there is a possibility that a cell block composed of a number of battery cells may move within a gap with the module frame.

[0006] The present invention is intended to solve the problems described above, and provides a battery module capable of restricting the position of a cell block and improving the position of a terminal hole, and a battery pack including the same.

[0007] A battery module according to one embodiment of the present invention includes 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 two insulating covers disposed on both sides of the battery cell stack, wherein one of the two insulating covers includes a pressure pad, the other insulating cover is disposed on the outside of the bus bar frame, and the pressure pad of the one insulating cover presses the battery cell stack in the direction of the other insulating cover disposed on the outside of the bus bar frame.

[0008] Additionally, the pressure pad is disposed on the inner surface of the one insulating cover facing the battery cell stack.

[0009] Additionally, the pressurized pad can be compressed.

[0010] Additionally, the pressure pad is made of a foam pad.

[0011] Additionally, a plurality of the above pressure pads are arranged on the inside of the one insulating cover.

[0012] Additionally, the busbar frame includes a protrusion, and the protrusion can contact the remaining one insulating cover.

[0013] In addition, the busbar frame is arranged on both sides of the battery cell stack, and the two insulating covers are arranged on the outer side of the busbar frame on both sides of the battery cell stack, respectively.

[0014] Additionally, it further includes a plurality of bus bars arranged on the bus bar frame.

[0015] Additionally, the ends of the pressure pads are placed between the bus bars.

[0016] Additionally, the busbar frame further includes ribs arranged between the busbars.

[0017] Additionally, the pressure pad presses the rib.

[0018] Additionally, the pressure pad extends vertically from the inside of the one insulating cover.

[0019] In addition, a battery module according to one embodiment of the present invention further includes a terminal bus bar arranged on the bus bar frame; and a fixing member having a fixing hole for fixing one end of the terminal bus bar and arranged on the lower side of one end of the terminal bus bar in the remaining insulating cover.

[0020] In addition, a battery module according to one embodiment of the present invention further includes an end plate disposed on the outside of the remaining one insulating cover and having a terminal opening through which one end of the terminal bus bar is exposed.

[0021] Additionally, the terminal bus bar includes a coupling hole arranged at one end thereof.

[0022] Additionally, it further includes two end plates each disposed on the outer side of the two insulating covers.

[0023] A battery module according to one embodiment of the present invention includes 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 arranged on one side of the battery cell stack; an insulating cover arranged on the outside of the bus bar frame; and the bus bar frame includes a protrusion that contacts the insulating cover.

[0024] A battery module and pack according to one embodiment of the present invention have the effect of restricting the position of a cell block and improving the hole position of a terminal bus bar.

[0025] FIG. 1 is a perspective view of a battery module according to one embodiment of the present invention.

[0026] Figure 2 is an exploded perspective view of a battery module according to one embodiment of the present invention.

[0027] Figure 3 is a perspective view of a battery cell in one embodiment of the present invention.

[0028] Figure 4 is a perspective view of a terminal bus bar in one embodiment of the present invention.

[0029] FIG. 5 is a perspective view of an insulating cover and an end plate in one embodiment of the present invention.

[0030] Figure 6 is a perspective view of an insulating cover in one embodiment of the present invention.

[0031] FIG. 7 is a drawing showing an insulating cover and an end plate being combined on both sides of a battery cell stack in one embodiment of the present invention.

[0032] FIG. 8 is a drawing showing a state in which an insulating cover is coupled to a busbar frame in one embodiment of the present invention.

[0033] Figure 9 is a partial plan view of a busbar frame and an insulating cover in one embodiment of the present invention.

[0034] Fig. 10 is a perspective view of a portion of a busbar frame and an insulating cover in one embodiment of the present invention.

[0035] Figure 11 is a drawing showing a state in which a hole of a terminal bus bar is accurately positioned in one embodiment of the present invention.

[0036] FIG. 12 is a drawing illustrating a battery pack according to one embodiment of the present invention.

[0037] FIG. 13 is a perspective view of a vehicle equipped with a battery pack according to one embodiment of the present invention.

[0038] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below 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 only 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 ambiguity in the interpretation of the present invention. Like reference numerals refer to like elements throughout the specification.

[0039] In order to clearly represent multiple layers and regions in the drawings, the thickness may be enlarged. Similar parts are designated by the same drawing reference numerals throughout the specification. When an element such as a layer, film, region, or plate is said to be "over" another element, this includes not only the case where it is "directly over" that element but also the case where there are other elements in between. Conversely, when an element is said to be "directly over" another element, this means that there are no other elements in between. Furthermore, when an element such as a layer, film, region, or plate is said to be "under" another element, this includes not only the case where it is "directly under" that element but also the case where there are other elements in between. Conversely, when an element is said to be "directly under" another element, this means that there are no other elements in between.

[0040] A battery module (1000) according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0041] FIG. 1 is a perspective view of a battery module according to the present invention, FIG. 2 is an exploded perspective view of a battery module according to the present invention, FIG. 3 is a perspective view of a battery cell in the present invention, FIG. 4 is a perspective view of a terminal bus bar in the present invention, FIG. 5 is a perspective view of an insulating cover and an end plate in the present invention, FIG. 6 is a perspective view of an insulating cover in the present invention, FIG. 7 is a drawing showing an insulating cover and an end plate being coupled to both sides of a battery cell stack in the present invention, FIG. 8 is a drawing showing a state in which an insulating cover is coupled to a bus bar frame in the present invention, FIG. 9 is a partial plan view of a bus bar frame and an insulating cover in one embodiment of the present invention, FIG. 10 is a partial perspective view of a bus bar frame and an insulating cover in one embodiment of the present invention, and FIG. 11 is a drawing showing a state in which a hole of a terminal bus bar is accurately positioned in one embodiment of the present invention.

[0042] 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 bus bar frame (300, 301) positioned on one side and / or the other side of the battery cell stack (100), an insulating cover (500, 501) positioned on the outside of the bus bar frame (300, 301), and an end plate (400, 401) positioned on the outside of the insulating cover (500, 501).

[0043] 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.

[0044] The direction from the front to the rear of the battery cell stack (100), or the opposite direction, may be defined as the longitudinal direction of the battery cell stack (100), and may be the Y-axis direction in the drawing. In addition, the direction from the upper surface to the lower surface of the battery cell stack (100), or the opposite direction, may be defined as the width direction of the battery cell stack (100), and may be the Z-axis direction in the drawing.

[0045] 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 positioned on the front and rear sides of the battery cell stack (100), and the bus bars (310, 320) of the battery module (1000) may be positioned close to the front and rear sides of the battery cell stack (100) to easily form an electrical connection with the electrode leads (111, 112).

[0046] The battery cell (110) may be provided as a pouch-shaped battery cell, and the number of pouch-shaped battery cells stacked per unit area may be maximized. However, the battery cell (110) does not necessarily have to be provided as a pouch-shaped battery cell, and may be provided in a square, cylindrical, or other various shapes.

[0047] 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).

[0048] The cell case (115) of the battery cell (110) may be a pouch-type cell case (115) for accommodating the electrode assembly. 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 integrally. In addition, as illustrated in FIG. 3, the connecting portions of the upper and lower cases may be formed in a structure in which they are bent and folded. In addition, as illustrated, the upper case may completely cover the lower case, and a sealing portion (114) may be formed at the periphery.

[0049] Both the upper and lower cases can be formed of a laminate structure including an inner covering layer, a metal layer, and an outer covering layer. The inner covering layer is located on the inside of the cell case (115) based on the metal layer and is in direct contact with the electrode assembly, so it must have insulation and electrolytic resistance. In addition, in order to seal it from the outside, the sealing portion where the inner layers are thermally bonded must have excellent thermal bonding strength. The metal layer is located between the inner covering layer and the outer covering layer and serves as a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside. A preferable material for the metal layer in contact with the inner covering layer is an aluminum (Al) thin film that is lightweight and has excellent formability. The outer covering layer is located on the outside of the cell case (115) based on the metal layer, and this outer covering layer can use a heat-resistant polymer with excellent tensile strength, moisture permeability, and air permeability to protect the electrode assembly while ensuring heat resistance and chemical resistance. For example, nylon or polyethylene terephthalate can be used.

[0050] A receiving groove (116) can be formed in each of the upper and lower cases, and an electrode assembly can be accommodated in the receiving groove (116) of the upper and lower cases.

[0051] The electrode assembly housed in the cell case (115) may be one of a group consisting of a jelly-roll type electrode assembly having a structure in which a separator is interposed between long sheet-shaped positive and negative electrodes and then rolled up, a stack type electrode assembly having unit cells 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 the unit cells are rolled up by a long separator film, and a lamination-stack type electrode assembly in which the unit cells are stacked with a separator interposed between them and attached to each other.

[0052] Additionally, the electrode assembly may include two electrode tabs and two electrode leads (111, 112) each connected to the electrode tabs by a weld.

[0053] One of the two electrode leads (111, 112) may be a positive lead connected to the positive tab, and the other electrode lead (111, 112) may be a negative lead connected to the negative tab.

[0054] A lead film (113) may be attached to each of the electrode leads (111, 112). The lead film (113) coupled to the electrode leads (111, 112) is positioned between the electrode leads (111, 112) and the cell case (115), thereby preventing a short circuit from occurring between the electrode leads (111, 112) and the cell case (115) and improving the sealing force, thereby preventing leakage of the electrolyte, etc.

[0055] The two electrode leads (111, 112) are shown as being arranged on each side of the electrode assembly, but may be arranged on only one side of the electrode assembly depending on the arrangement of the electrode tabs.

[0056] The above module case (200) may be for protecting the battery cell stack (100) and electrical components connected thereto from external physical impact, and the module case (200) may accommodate the battery cell stack (100) and electrical components connected thereto in the internal space of the module case (200).

[0057] The structure of the module case (200) may vary, and for example, the structure of the module case (200) may be a mono-frame structure. Here, the mono-frame may be in the form of a metal plate having an upper surface, a lower surface, and both side surfaces that are integrated. The mono-frame 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 (upper 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 on the upper side of a U-shaped frame, which is a metal plate having a lower surface and both side surfaces that are combined or integrated, and each frame or plate may be manufactured by press molding. In addition, the structure of the module case (200) may be provided as an L-shaped frame structure in addition to a mono-frame or a U-shaped frame, and may be provided as various structures not described in the above-described examples.

[0058] 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 sides of the battery cell stack (100) may not be covered by the module case (200). The electrode leads (111, 112) of the battery cells (110) may not be covered by the module case (200). The front and rear sides of the battery cell stack (100) may be covered by a bus bar frame (300, 301), an end plate (400), or a bus bar (310, 320) to be described later, and through this, the front and rear sides of the battery cell stack (100) may be protected from external physical impacts, etc.

[0059] A compression pad (150) may be positioned between one side of the inner surface of the battery cell stack (100) and the module case (200).

[0060] The compression pad (150) can be arranged to face the battery cell (110) at the outermost end of the battery cell stack (100) in the X-axis direction in the drawing.

[0061] Also, 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 positioned on the Z-axis of the battery cell stack (100), and the thermally conductive resin layer may be formed between the battery cell stack (100) and the bottom surface positioned on the -Z-axis of the module case (200).

[0062] The above busbar frame (300, 301) is positioned on one side of the battery cell stack (100), and can 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, 301) can be positioned on the front or rear side of the battery cell stack (100) as illustrated, and can also be positioned on the upper side, lower side, or side. At least one of a busbar (310, 320) and a module connector can be mounted on the busbar frame (300, 301). As illustrated in FIG. 2, one side of the busbar frame (300, 301) can be connected to one side or the other side of the battery cell stack (100), and the other side of the busbar frame (300, 301) can be connected to the busbar (310, 320).

[0063] The busbar frame (300, 301) may include one or more busbar mounting brackets (340) and one or more ribs (ribs, 330) on which busbars (310, 320) are coupled and mounted (see FIG. 8).

[0064] A busbar (310, 320) can be mounted on the front of a busbar mounting bracket (340) in a busbar frame (300, 301), and a plurality of busbar mounting brackets (340) can be arranged spaced apart in the width direction of the battery module (1000).

[0065] The rib (330) can be configured to connect two busbar mounting brackets (340) between adjacent busbar mounting brackets (340). The rib (340) can be arranged between two adjacent busbar mounting brackets (340) to improve the rigidity of the busbar frame (300, 301).

[0066] The busbar frame (300, 301) may be made of an electrically insulating material or may include an insulating material. The busbar frame (300, 301) may limit the contact of the busbar (310, 320) with other parts of the battery cells (110) other than the part where the busbar is connected to the electrode leads (111, 112), and may prevent electrical short circuits from occurring.

[0067] The busbar frame (300, 301) may be positioned on one side and the other side of the battery cell stack (100), respectively.

[0068] The busbar (310, 320) is mounted on a busbar mounting plate (340) on one side of the busbar frame (300, 301) and may be used to electrically connect the battery cell stack (100) or battery cells (110) and an external device circuit. A plurality of busbars (310, 320) may be arranged, and are positioned between the battery cell stack (100) or the busbar frame (300, 301) and the end plate (400), thereby protecting the battery from external impacts, etc., and minimizing the deterioration of durability due to external moisture, etc.

[0069] 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).

[0070] Specifically, the electrode leads (111, 112) of the battery cell (110) can be bent and connected to the bus bars (310, 320) after passing through the lead slits formed in the bus bar frames (300, 301). As illustrated in FIG. 8, the electrode leads (111, 112) of the battery cell (110) can be connected to both sides of the bus bars (310, 320), and the electrode lead (111) connected to one side of the bus bars (310, 320) can be a positive lead, and the electrode lead (112) connected to the other side of the bus bars (310, 320) can be a negative lead.

[0071] Battery cells (110) constituting the battery cell stack (100) can be connected in series or parallel by bus bars (310, 320).

[0072] The busbars (310, 320) may include terminal busbars (320) for electrically connecting one battery module (100) to another battery module (100). At least a portion of the terminal busbars (320) may be exposed to the outside of the end plate (400) to be connected to another battery module (100), and the end plate (400) may include terminal openings (410) for this purpose.

[0073] The terminal bus bar (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).

[0074] As illustrated in FIG. 4, the terminal bus bar (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 a terminal opening (410). In addition, the terminal bus bar (320) may further include a bending portion (323) formed between the first portion (321) and the second portion (322).

[0075] In the terminal bus bar (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) in the terminal bus bar (320), the second part (322) can protrude and be seated in the seating part (530) of the insulating cover (500), and the second part (322) can be electrically connected to the inter bus bar (not shown). A joining hole (322a) is formed in the second part (322) constituting one end of the terminal bus bar (320), and the second part (322) of the terminal bus bar (320) can be fixed by a fixing pin (not shown) inserted into the joining hole (322a).

[0076] In addition, the busbar frame (300, 301) may include a protrusion (350). As illustrated in FIGS. 9 and 10, in the present embodiment, a protrusion (350) may be disposed on the busbar frame (300) where the terminal busbar (320) is disposed. The protrusion (350) protrudes from the busbar frame (300) toward the insulating cover (500), and an end of the protrusion (350) may contact the inner surface of the insulating cover (500). The protrusion (350) may extend outward from the busbar mounting plate (340) or the rib (330), and may extend vertically along the longitudinal direction of the busbar (310, 320) in the busbar frame (300).

[0077] The end plates (400, 401) may be arranged on the outer side of two insulating covers (500, 501) arranged on both sides of the battery cell stack (100). The end plates (400, 401) may be used to seal the open surface of the module case (200) to protect the battery cell stack (100) and electrical components connected thereto from external physical impact. To this end, the end plates (400, 401) may be manufactured from a material having a predetermined strength, and for example, the end plates (400, 401) may include a metal such as aluminum or a plastic material.

[0078] The end plate (400, 401) may include a terminal opening (410). In the present embodiment, the terminal opening (410) may be arranged in the end plate (400) which is arranged on the outside of the insulating cover (500) on which one end of the terminal bus bar (320) is mounted. The terminal opening (410) may be arranged on each of both sides of the end plate (400), and a part of the insulating cover (500) and one end (second portion (322)) of the terminal bus bar (320) may be exposed through the terminal opening (410).

[0079] In addition, a connector opening may be located between 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.

[0080] The end plate (400, 401) can be combined with the module case (200) while covering the busbar frame (300, 301) 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 a corresponding corner of the module case (200) by welding, bolting, hooking, or the like.

[0081] The end plates (400, 401) can be positioned on one side and the other side of the module case (200) to cover both sides of the battery cell stack (100). In this embodiment, an example in which the end plates (400, 401) are positioned on the front and rear sides of the module case (200) is shown.

[0082] In addition, an insulating cover (500, 501) for electrical insulation may be placed between the end plate (400, 401) and the busbar frame (300, 301). In the present embodiment, the insulating covers (500, 501) may be placed on each side of the battery cell stack (100), one insulating cover (301) may be placed between the end plate (401) and the busbar frame (301), and the remaining insulating cover (300) may be placed between the end plate (400) and the busbar frame (300).

[0083] That is, a busbar frame (300, 301), an insulating cover (500, 501), and an end plate (400, 401) can be sequentially positioned from the battery cell stack (100) outward. Like the end plates (400, 401), the busbar frame (300, 301) and the insulating cover (500, 501) can each be configured in multiples.

[0084] The insulating cover (500, 501) may be made of or include an electrically insulating material and may block the busbar (310, 320) from contacting the end plate (400, 401).

[0085] An insulating cover (500) disposed on the outside of a busbar frame (300) on which a terminal busbar (320) is disposed may include an opening (510) and a mounting portion (530). The openings (510) may be disposed 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 openings (510).

[0086] In addition, a connector opening may be located between the openings (510) located on both sides of the insulating cover (500), and the module connector may be exposed to the outside through the connector opening.

[0087] The insulating cover (500, 501) may be positioned on the inner surface of the end plate (400, 401) and may be in close contact with the inner surface of the end plate (400, 401), but this is not necessarily the case.

[0088] As described above, one end (the second part (322)) of the terminal bus bar (320) can be exposed through the opening (510), and the exposed one end (the second part (322)) of the terminal bus bar (320) can be seated on the mounting portion (530). Accordingly, the mounting portion (530) can be positioned adjacent to the opening (510) and can be positioned on the upper outer surface.

[0089] The mounting portion (530) may have a second portion (322) of the terminal bus bar (320) mounted on its upper surface, and thus the upper surface of the mounting portion (530) may form a mounting surface. In addition, as illustrated in FIG. 5, the mounting portion (530) may include a fixing member (531) for fixing the terminal bus bar (320).

[0090] The fixing member (531) can fix the second part (322) of the terminal bus bar (320) and may include a fixing hole (531a).

[0091] A fixing pin (not shown) can be inserted into the fixing hole (531a) above. A fixing pin (not shown) inserted into a joining hole (322a) formed in a second part (322) of the terminal bus bar (320) is fixed by being coupled to the fixing hole (531a), thereby fixing the second part (322) of the terminal bus bar (320) to the insulating cover (500).

[0092] Accordingly, the second part (322) of the terminal bus bar (320) is seated on the mounting portion (530) of the insulating cover (500), and the second part (322) is seated on the fixing member (531) arranged on the mounting portion (530) and comes into contact with it.

[0093] In addition, a terminal cover portion (not shown) covering one end (second portion (322)) of the exposed terminal bus bar (320) can be placed on the insulating cover (500).

[0094] Meanwhile, as shown in FIGS. 6 to 8, the opposite insulating cover (501) of the insulating cover (500) on which one end of the terminal bus bar (320) is mounted may include a pressure pad (540).

[0095] The pressure pad (540) can be placed on the inner surface of the insulating cover (501) facing the busbar frame (301) and can press the busbar frame (301) toward the battery cell stack (100). In addition, the pressure pad (540) can press the battery cell stack (100) toward the opposite insulating cover (500) through the busbar frame (301). In addition, the pressure pad (540) can be compressed while pressing the busbar frame (301).

[0096] A plurality of pressure pads (540) can be arranged spaced apart from each other, and a plurality of pressure pads (540) can be arranged spaced apart from each other in the width direction (X-axis direction) of the insulating cover (501) or the battery module (1000).

[0097] Each pressure pad (540) may extend vertically, and the vertical length of the pressure pad (540) may be shorter than that of the insulating cover (501). The pressure pad (540) is illustrated as having a rectangular cross-section in a plan view, but is not limited thereto and may have a cross-section of a different shape.

[0098] This pressure pad (540) can pressurize the busbar frame (301) between the busbars (310, 320) arranged in the busbar frame (301), and specifically, the front end of the pressure pad (540) can contact the rib (330) positioned between the busbars (310, 320) in the busbar frame (301) to pressurize the rib (330).

[0099] In the busbar frame (300, 301), the rib (330) can be positioned between the busbars (310, 320) and can be formed in a concave shape toward the battery cell stack (100). The front end of the pressure pad (540) can be positioned between two busbars (310, 320), and the pressure pad (540) can contact the rib (330) between the busbars (310, 320) to press the rib (330) toward the battery cell stack (100).

[0100] The pressure pad (540) may be made of a foam pad and may be made of a synthetic resin foam, for example, may be made of urethane foam.

[0101] In Fig. 7, an example is shown in which three pressure pads (540) are placed on an insulating cover (501), but the number of pressure pads may be changed.

[0102] In this way, the pressure pad (540) presses the battery cell stack (100) through the busbar frame (301) toward the opposite insulating cover (500), and the protrusion (350) of the opposite busbar frame (300) comes into contact with the inner surface of the insulating cover (500). As a result, the position of the hole (joining hole (322a)) of the terminal busbar (320) is improved.

[0103] As described above, the terminal bus bar (320) can be fixed to the insulating cover (500) by the fixing pin (not shown) inserted into the joining hole (322a) of the terminal bus bar (320) being joined and fixed to the fixing hole (531a) of the insulating cover (500). However, if the joining hole (322a) of the terminal bus bar (320) and the fixing hole (531a) of the insulating cover (500) are not aligned and the joining hole (322a) of the terminal bus bar (320) is misaligned from the fixing hole (531a) of the insulating cover (500), it becomes difficult to fix the terminal bus bar (320) to the insulating cover (500) with the fixing pin.

[0104] Therefore, the position of the hole of the terminal bus bar (320) is also important. In the present invention, when the pressure pad (540) presses the battery cell stack (100) toward the opposite insulating cover (500), and the protrusion (350) of the opposite bus bar frame (300) touches the inner surface of the insulating cover (500), the joining hole (322a) of the terminal bus bar (320) can be positioned at the correct position. Therefore, as illustrated in FIG. 11, the joining hole (322a) of the terminal bus bar (320) can be arranged to match the fixing hole (531a) of the insulating cover (500), thereby improving the assembling and workability of the battery module (1000).

[0105] Meanwhile, electrical connection between battery modules (1000) can be made through an inter-bus bar (not shown). The inter-bus bar is a member for connecting one battery module (1000) to another adjacent battery module (1000) or a BDU (Battery Disconnection Unit), and can be connected to an exposed end (second part (322)) of a terminal bus bar (320). For example, the inter-bus bar can be connected to overlap the upper end (second part (322)) of one end of the terminal bus bar (320).

[0106] After one end of the inter-bus bar is placed overlappingly on the second part (322) of the terminal bus bar (320), a fixing pin is sequentially inserted into the joining hole of the inter-bus bar and the joining hole (322a) of the second part (322) of the terminal bus bar (320), and then the fixing pin is fixed to the fixing groove (531a) of the mounting portion (530), so that the inter-bus bar can be connected to the terminal bus bar (320).

[0107] And, the second part (322) of the terminal bus bar (320) together with the inter bus bar can be fixed to the insulating cover (500) by a fixed pin.

[0108] As described above, one or more battery modules (1000) according to the present invention can form a battery pack (2000). As illustrated in FIG. 12, a battery pack (2000) according to an embodiment of the present invention can accommodate at least one battery module (1000) inside a pack case (2100), and can include various control and protection systems such as a BMS (Battery Management System) and a cooling system.

[0109] 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.

[0110] Meanwhile, in the 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 be directly arranged inside the battery pack (2000).

[0111] The battery module (1000) and battery pack (2000) according to the present invention, configured as described above, can be applied to various devices. Specifically, they can be applied to means of transportation such as electric bicycles, electric vehicles (V), hybrid vehicles, and ESS (Energy Storage Systems), but are not limited thereto and can be applied to various devices capable of using secondary batteries.

[0112] Fig. 13 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) so that the electric vehicle can be driven.

[0113] Although the present invention has been described with reference to preferred embodiments as described above, it is not limited to the above embodiments, and various changes and modifications may be made by a person having ordinary skill in the art to which the invention pertains within a scope that does not depart from the spirit of the present invention.

[0114] The present invention can provide a battery module and pack that restricts the position of a cell block and improves the hole position of a terminal bus bar.

Claims

1. A battery cell stack in which multiple battery cells are stacked; A module case for accommodating the above battery cell stack; A bus bar frame arranged on one side of the above battery cell stack; and Two insulating covers arranged on both sides of the above battery cell stack; Including, One of the two insulating covers above includes a pressure pad, The remaining one insulating cover is placed on the outside of the busbar frame, A battery module in which the pressurizing pad of the one insulating cover presses the battery cell stack toward the other insulating cover disposed on the outside of the busbar frame.

2. In paragraph 1, A battery module wherein the above-mentioned pressure pad is arranged on the inner surface facing the battery cell stack in the above-mentioned one insulating cover.

3. In paragraph 1, The above pressurized pad is a compressible battery module.

4. In paragraph 1, The above pressure pad is a battery module made of a foam pad.

5. In paragraph 1, A battery module in which a plurality of the above pressurized pads are arranged on the inner side of the one insulating cover.

6. In paragraph 1, The above busbar frame includes a protrusion, The above protrusion is a battery module that touches the remaining one insulating cover.

7. In paragraph 1, The above busbar frame is arranged on both sides of the battery cell stack, A battery module in which the two insulating covers are respectively placed on the outer side of the bus bar frame on both sides of the battery cell laminate.

8. In paragraph 7, A battery module further comprising a plurality of busbars arranged on the busbar frame.

9. In paragraph 8, A battery module in which the ends of the above pressurized pads are placed between the above bus bars.

10. In paragraph 8, A battery module wherein the busbar frame further includes ribs arranged between the busbars.

11. In paragraph 10, The above pressurizing pad is a battery module that pressurizes the rib.

12. In paragraph 1, The above pressure pad is a battery module extending vertically from the inside of the one insulating cover.

13. In paragraph 1, a terminal busbar arranged on the above busbar frame; and A battery module further comprising a fixing member having a fixing hole for fixing one end of the terminal bus bar and arranged on the lower side of one end of the terminal bus bar in the remaining one insulating cover.

14. In paragraph 13, A battery module further comprising an end plate disposed on the outside of the remaining one insulating cover and having a terminal opening through which one end of the terminal bus bar is exposed.

15. In paragraph 13, A battery module including a bonding hole arranged at one end of the terminal bus bar.

16. In paragraph 1, A battery module further comprising two end plates each positioned on the outer side of the two insulating covers.

17. A battery cell stack in which a plurality of battery cells are stacked; A module case for accommodating the above battery cell stack; A busbar frame arranged on one side of the above battery cell stack; An insulating cover placed on the outside of the above bus bar frame; and The above busbar frame is a battery module including a protrusion that contacts the insulating cover.

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