Battery module and method for manufacturing battery module

Abstract

The invention relates to a battery module and a method for manufacturing the battery module. The battery module comprises a plurality of battery cells arranged in the horizontal direction. Each of the plurality of battery cells includes a cell exhaust portion, a positive electrode terminal, and a negative electrode terminal. And the battery module also comprises a heat-resistant part poured on the plurality of battery monomers. The heat-resistant portion includes a heat-resistant exhaust portion provided in a region corresponding to the cell exhaust portion, and a heat-resistant support portion provided outside the heat-resistant exhaust portion. The battery module also includes a bus bar bracket on the heat resistant portion. The bus bar bracket includes a bracket vent hole in a region corresponding to the heat resistant vent portion and a bus bar hole in a region corresponding to the positive electrode terminal and the negative electrode terminal. The battery module further includes a bus bar on the heat resistant portion and connected to the positive electrode terminals and the negative electrode terminals of the plurality of battery cells.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2023 - 0170556, filed on November 30, 2023, with the Korean Intellectual Property Office, the entire content of which is incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a battery module and a method for manufacturing a battery module. Background Art

[0004] Unlike primary batteries that are not designed to be (re)charged, secondary (or rechargeable) batteries are designed to discharge and recharge. Low - capacity secondary batteries are used in portable small electronic devices (such as smart phones, feature phones, laptop computers, digital cameras, and camcorders), while high - capacity secondary batteries are widely used as power sources for driving motors in hybrid and electric vehicles and for storing electricity (e.g., home and / or utility - scale electricity storage). A secondary battery generally includes an electrode assembly composed of a positive electrode and a negative electrode, a case that houses the electrode assembly, and electrode terminals connected to the electrode assembly.

[0005] The above information disclosed in this background art section is for enhancing the understanding of the background of the present disclosure, and thus may include information that does not constitute relevant (or prior) art. Summary of the Invention

[0006] The present disclosure provides a battery module capable of preventing heat propagation and thermal runaway.

[0007] These and other aspects and features of the present disclosure will be described in the following description of embodiments of the present disclosure, or will be apparent from the following description of embodiments of the present disclosure.

[0008] A battery module for solving the technical problem according to an embodiment of the present disclosure may include: a plurality of battery cells arranged in a horizontal direction, each of the plurality of battery cells including a cell exhaust portion, a positive electrode terminal, and a negative electrode terminal; a heat - resistant portion poured on the plurality of battery cells, the heat - resistant portion including a heat - resistant exhaust portion provided in a region corresponding to the cell exhaust portion and a heat - resistant support portion provided outside the heat - resistant exhaust portion; a bus bar bracket provided on the heat - resistant portion, the bus bar bracket including a bracket exhaust hole provided in a region corresponding to the heat - resistant exhaust portion and a bus bar hole provided in regions corresponding to the positive electrode terminal and the negative electrode terminal; and a plurality of bus bars provided on the heat - resistant portion and connected to the positive electrode terminals and the negative electrode terminals of the plurality of battery cells.

[0009] In some embodiments, the heat - resistant exhaust portion may include a notch.

[0010] In some embodiments, the depth of the notch can be about 1 / 3 to about 2 / 3 of the thickness of the heat-resistant exhaust portion.

[0011] In some embodiments, the planar shape of the notch can include a cross shape.

[0012] In some embodiments, the heat-resistant exhaust portion can contact the monomer exhaust portion.

[0013] In some embodiments, the thickness of the heat-resistant exhaust portion can be greater than the thickness of the heat-resistant support portion.

[0014] In some embodiments, the heat-resistant exhaust portion can protrude downward from the heat-resistant support portion.

[0015] In some embodiments, the monomer exhaust portion can be connected to the lower part of the monomer exhaust hole of the battery cell, and the heat-resistant exhaust portion can be connected to the monomer exhaust hole.

[0016] In some embodiments, the heat-resistant portion can include an epoxy material or a silicone material.

[0017] In some embodiments, the upper surface of the heat-resistant exhaust portion and the upper surface of the heat-resistant support portion can be coplanar.

[0018] In some embodiments, the heat-resistant exhaust portion can protrude upward from the heat-resistant support portion.

[0019] In some embodiments, the heat-resistant exhaust portion can be connected to the bracket exhaust hole.

[0020] In some embodiments, the upper surface of the heat-resistant exhaust portion can be coplanar with the upper surface of the bus bar bracket.

[0021] A method for manufacturing a battery module according to an embodiment of the present disclosure for solving this technical problem can include: providing a plurality of battery cells arranged in a horizontal direction, each of the plurality of battery cells including a monomer exhaust portion, a positive electrode terminal, and a negative electrode terminal; pouring a heat-resistant portion on the plurality of battery cells, the heat-resistant portion including a heat-resistant exhaust portion provided in a region corresponding to the monomer exhaust portion and a heat-resistant support portion provided outside the heat-resistant exhaust portion; providing a bus bar bracket disposed on the heat-resistant portion, the bus bar bracket including a bracket exhaust hole provided in a region corresponding to the heat-resistant exhaust portion and a bus bar hole provided in regions corresponding to the positive electrode terminal and the negative electrode terminal; and providing a plurality of bus bars disposed on the heat-resistant portion and connecting the positive electrode terminals and the negative electrode terminals of the plurality of battery cells.

[0022] A method for manufacturing a battery module for solving the technical problem according to an embodiment of the present disclosure may include: providing a plurality of battery cells arranged in a horizontal direction, each of the plurality of battery cells including a cell exhaust portion, a positive electrode terminal, and a negative electrode terminal; providing a bus bar bracket disposed on the plurality of battery cells, the bus bar bracket including a bracket exhaust hole provided in a region corresponding to the cell exhaust portion and a bus bar hole provided in a region corresponding to the positive electrode terminal and the negative electrode terminal; pouring a heat-resistant portion between the plurality of battery cells and the bus bar bracket, the heat-resistant portion including a heat-resistant exhaust portion provided in a region corresponding to the cell exhaust portion and a heat-resistant support portion provided outside the heat-resistant exhaust portion; and providing a plurality of bus bars disposed on the heat-resistant portion and connecting the positive electrode terminals and the negative electrode terminals of the plurality of battery cells.

[0023] As described above, according to the present invention, a battery module capable of preventing heat propagation and thermal runaway is provided.

[0024] However, aspects and features of the present disclosure are not limited to those described above, and those skilled in the art will clearly understand other aspects and features not explicitly described herein from the description of the exemplary embodiments of the present disclosure below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A is a perspective view of a prismatic battery according to an embodiment of the present disclosure.

[0026] Figure 1B is along Figure 1A in the line 1b-1b of the cross-sectional view taken.

[0027] Figure 2 is a perspective view of a battery module according to an embodiment of the present disclosure.

[0028] Figure 3A and Figure 3B is a perspective view of a battery pack according to an embodiment of the present disclosure.

[0029] Figure 4A and Figure 4B show examples of a vehicle body and a vehicle to which one or more embodiments of the present disclosure can be applied.

[0030] Figures 5A to 5D Illustrate a method for charging a secondary battery according to an embodiment of the present disclosure.

[0031] Figure 6 is a perspective view showing an exemplary battery module according to the present disclosure.

[0032] Figure 7 is Figure 6 an enlarged view of a partial region of.

[0033] Figure 8 is a magnified cross-sectional perspective view taken by cutting a part of Figure 6 .

[0034] Figure 9 is a magnified cross-sectional view taken by cutting a part of Figure 6 .

[0035] Figure 10 is a flowchart showing a method for manufacturing an exemplary battery module according to the present disclosure.

[0036] Figure 11 is a flowchart showing a method for manufacturing an exemplary battery module according to the present disclosure. DETAILED DESCRIPTION

[0037] Herein, embodiments of the present disclosure will be described with reference to the accompanying drawings. The terms or words used in this specification and claims should not be construed as limited to the ordinary meaning or dictionary meaning, and should be interpreted in the best way based on the concept that the inventor can be his / her own lexicographer to appropriately define the terms, and should be interpreted as meanings and concepts consistent with the technical idea of the present disclosure.

[0038] The embodiments described in this specification and the configurations shown in the drawings are only some of the embodiments of the present disclosure, and do not represent all the technical ideas, aspects, and features of the present disclosure. Accordingly, it should be understood that various equivalents and modifications capable of replacing or modifying the embodiments described herein may exist at the time of filing this application.

[0039] It will be understood that when an element or layer is referred to as being "on", "connected to", or "coupled to" another element or layer, it can be directly on, directly connected to, or directly coupled to the other element or layer, or there may also be one or more intervening elements or layers. When an element or layer is referred to as being "directly on", "directly connected to", or "directly coupled to" another element or layer, there are no intervening elements or layers. For example, when a first element is described as being "coupled" or "connected" to a second element, the first element can be directly coupled or connected to the second element, or the first element can be indirectly coupled or connected to the second element via one or more intervening elements.

[0040] In the figures, for clarity of illustration, the dimensions of various elements, layers, etc. may be exaggerated. The same reference numerals refer to the same elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Additionally, the use of "may" in describing embodiments of the present disclosure refers to "one or more embodiments of the present disclosure". Expressions such as "at least one of..." and "any of..." when following a list of elements modify the entire list of elements, not individual elements in the list. When phrases such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one selected from the group consisting of A, B, and C", or "at least one selected from among A, B, and C" are used to indicate a list of elements A, B, and C, the phrase can refer to any one of A, B, and C and all suitable combinations or subsets, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term "use" may be considered synonymous with the term "utilize". As used herein, the terms "substantially", "about", and similar terms are used as approximate terms and not as terms of degree, and are intended to account for the inherent variability of measured or calculated values that would be recognized by a person of ordinary skill in the art.

[0041] It will be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section.

[0042] For ease of description, spatial relative terms (such as "beneath", "below", "under", "above", "on", etc.) may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "on" the other element or feature. Thus, the term "below" can encompass both an upper and a lower orientation. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0043] The terms used in this disclosure are for the purpose of describing embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, the singular form "a" is intended to also include the plural form unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0044] In addition, any numerical range disclosed and / or recited herein is intended to include all sub-ranges of the same numerical precision subsumed within the recited range. For example, a range of "1.0 to 10.0" is intended to include all sub-ranges between (and including) the recited minimum value of 1.0 and the recited maximum value of 10.0, that is, all sub-ranges having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0 (e.g., such as 2.4 to 7.6). Any maximum numerical limitation recited herein is intended to include all lower numerical limitations subsumed therein, and any minimum numerical limitation recited in this specification is intended to include all higher numerical limitations subsumed therein. Accordingly, the applicant reserves the right to amend this specification, including the claims, to expressly recite any sub-ranges subsumed within the ranges expressly recited herein.

[0045] Two compared elements, features, etc. being referred to as "the same" may mean that they are "substantially the same." Thus, the phrase "substantially the same" may include cases having a deviation considered to be low in the art (e.g., a deviation of 5% or less). Additionally, when a certain parameter is said to be uniform in a given region, it may mean that it is uniform in terms of the average value.

[0046] Throughout the specification, unless otherwise stated, each element may be singular or plural.

[0047] When any element is referred to as being disposed (or located or positioned) "above (or below)" or "on (or under)" a component, it may mean that the any element is placed in contact with the upper surface (or lower surface) of the component, or it may mean that another component may be interposed between the component and any element disposed (or located or positioned) on (or under) the component.

[0048] In addition, it will be understood that when an element is referred to as being "coupled", "linked" or "connected" to another element, these elements can be directly "coupled", "linked" or "connected" to each other, or there can be an intervening element therebetween through which the element can be "coupled", "linked" or "connected" to the other element. In addition, when a component is referred to as being "electrically coupled" to another component, the component can be directly connected to the other component, or there can be an intervening component therebetween such that the component and the other component are indirectly connected to each other.

[0049] Throughout the specification, unless otherwise stated, when stating "A and / or B", it means A, B, or A and B. That is, "and / or" includes any one or all combinations of the listed multiple items. Unless otherwise specified, when stating "C to D", it means equal to or greater than C and less than or equal to D.

[0050] A battery pack according to one or more embodiments includes at least one battery module and a pack housing having an accommodation space in which at least one battery module is accommodated.

[0051] The battery module may include a plurality of battery cells and a module housing. The battery cells may be accommodated inside the module housing in a stacked form (or stacked arrangement or configuration). Each battery cell may have a positive electrode terminal and a negative electrode terminal, and may be cylindrical, prismatic, or pouch-shaped according to the shape of the battery. In this specification, a battery cell may also be referred to as a secondary battery, a battery, or a cell.

[0052] In the battery pack, one cell stack may constitute one module in place of a battery module stack. The cell stack may be accommodated in the accommodation space of the pack housing, or may be accommodated in an accommodation space separated by a frame, a partition wall, etc.

[0053] A large amount of heat may be generated during charging / discharging of the battery cells. The generated heat may accumulate in the battery cells, thereby accelerating the deterioration of the battery cells. Accordingly, the battery pack may further include a cooling member to remove the generated heat, thereby suppressing the deterioration of the battery cells. The cooling member may be provided at the bottom of the accommodation space in which the battery cells are provided, but is not limited thereto, and may be provided at the top or side depending on the battery pack.

[0054] The battery cells may be configured such that exhaust gas generated inside the battery cells under abnormal operating conditions (also referred to as thermal runaway or thermal event) is discharged to the outside of the battery cells. The battery pack or the battery module may include an exhaust port for discharging the exhaust gas to prevent or reduce damage to the battery pack or the battery module caused by the exhaust gas.

[0055] The battery pack may include batteries and a battery management system (BMS) for managing the batteries. The battery management system may include a detection device, a balancing device, and a control device. The battery module may include a plurality of cells connected in series and / or in parallel with each other. The battery modules may be connected in series and / or in parallel with each other.

[0056] The detection device may detect the state of the battery (e.g., voltage, current, temperature, etc.) to output state information indicating the state of the battery. The detection device may detect the voltage of each cell or each battery module constituting the battery. The detection device may detect the current flowing through each battery module constituting the battery module or the battery pack. The detection device may also detect the temperature of the cells and / or modules and / or the ambient temperature at at least one point of the battery.

[0057] The balancing device may perform a balancing operation on the battery modules and / or the cells constituting the battery modules. The control device may receive the state information (e.g., voltage, current, temperature, etc.) of the battery module from the detection device. The control device may monitor and calculate the state of the battery module (e.g., voltage, current, temperature, state of charge (SOC), life (state of health (SOH), etc.) based on the state information received from the detection device. Additionally, based on the monitored state information, the control device may perform control functions (e.g., temperature control, balancing control, charge / discharge control, etc.) and protection functions (e.g., over-discharge, over-charge, over-current protection, short circuit, fire extinguishing function, etc.). Additionally, the control device may perform wired or wireless communication functions with external devices of the battery pack (e.g., a higher-level controller or a vehicle, a charger, a power conversion system, etc.).

[0058] The control device may control the charge / discharge operation and protection operation of the battery. To this end, the control device may include a charge / discharge control unit, a balancing control unit, and / or a protection unit.

[0059] The battery management system is a system that monitors the state of the battery and performs diagnostic, control, communication, and protection functions, and may calculate the charge / discharge state, calculate the battery life or state of health (SOH), cut off the battery power supply (e.g., relay control) when necessary, control thermal management (e.g., cooling, heating, etc.), perform a high-voltage interlock function, and / or may detect and / or calculate insulation and short-circuit conditions.

[0060] The relay may be a mechanical contactor that is turned on and off by the magnetic force of a coil, or a semiconductor switch (such as a metal-oxide-semiconductor field-effect transistor (MOSFET)).

[0061] The relay control has the function of cutting off the power supply of the battery if there is a problem in the vehicle and the battery system (or when there is a problem in the vehicle and the battery system), and may include one or more relays and a pre-charge relay at the positive electrode terminal and the negative electrode terminal, respectively.

[0062] In pre-charge control, when connecting a battery load, there is a risk of surge current occurring in the high-voltage capacitor at the input side of the inverter. Therefore, in order to prevent surge current when starting the vehicle, the pre-charge relay can be operated before connecting the main relay, and a pre-charge resistor can be connected.

[0063] High-voltage interlock is a circuit that uses a small signal to detect whether all high-voltage components of the entire vehicle system are connected, and may have the function of forcibly disconnecting the relay if an open circuit occurs at even one position in the entire loop (or when an open circuit occurs at even one position in the entire loop).

[0064] Figure 1A is a perspective view of a secondary battery illustrating one or more embodiments according to the present disclosure, and Figure 1B is along Figure 1A a cross-sectional view taken along line 1b-1b in

[0065] Referring to Figure 1A and Figure 1B a secondary battery 100 according to one or more embodiments of the present disclosure may include at least one electrode assembly 110 in which a separator 113 as an insulator is wound between a positive electrode 111 and a negative electrode 112, a case 120 that receives (or houses) the electrode assembly 110, and a cover assembly 130 coupled to an opening of the case 120.

[0066] According to Figure 1A and Figure 1B the secondary battery 100 illustrated in one or more embodiments in

[0067] Each of the positive electrode 111 and the negative electrode 112 may include a current collector made of a thin metal foil, a coated portion coated with an active material, and uncoated portions 111a, 112a that are not coated with the active material, respectively.

[0068] The positive electrode 111 and the negative electrode 112 can be wound after positioning the separator 113, which is an insulator, therebetween. However, the present disclosure is not limited thereto, and the electrode assembly 110 can have a structure in which the positive electrode 111 and the negative electrode 112, both made of a plurality of sheets, are alternately stacked with the separator therebetween.

[0069] The case 120 can form the overall appearance of the secondary battery 100 and can be made of a conductive metal such as aluminum, an aluminum alloy, or nickel-plated steel. In addition, the case 120 can provide an internal space in which the electrode assembly 110 is accommodated.

[0070] The cover assembly 130 can include a cover plate 131 that covers the opening in the case 120, and the case 120 and the cover plate 131 can be made of a conductive material. The positive electrode terminal 121 and the negative electrode terminal 122, which are electrically connected to the positive electrode 111 and the negative electrode 112, respectively, can penetrate (or extend through) the cover plate 131 and protrude outwardly through it.

[0071] In addition, the outer circumferential surface (e.g., the circumferential surface) of the upper posts of the positive electrode terminal 121 and the negative electrode terminal 122 that protrude outwardly from the cover plate 131 can be threaded and can be fixed to the cover plate 131 using nuts.

[0072] However, the present disclosure is not limited thereto, and the positive electrode terminal 121 and the negative electrode terminal 122 can have a rivet structure and can be riveted or welded to the cover plate 131.

[0073] In addition, the cover plate 131 can be made of a thin plate and can be coupled to the opening in the case 120, and an electrolyte injection port 132 in which a sealing plug 133 can be installed can be located (e.g., formed) in the cover plate 131, and a monomer exhaust portion 134 having a notch 134a can be provided in the cover plate 131.

[0074] The positive electrode terminal 121 and the negative electrode terminal 122 can be electrically connected to the uncoated portion 111a of the positive electrode and the uncoated portion 112a of the negative electrode by being respectively bonded or coupled (e.g., by welding) to a current collector including a first current collector 140 and a second current collector 150 (hereinafter referred to as the positive electrode current collector and the negative electrode current collector, respectively).

[0075] In one or more embodiments, the positive electrode terminal 121 and the negative electrode terminal 122 can be respectively coupled to the positive electrode current collector 140 and the negative electrode current collector 150 by welding. However, the present disclosure is not limited thereto, and the positive electrode terminal 121 and the negative electrode terminal 122 and the positive electrode current collector 140 and the negative electrode current collector 150 can be integrally formed in one or more embodiments, or can be coupled in any other suitable manner.

[0076] In addition, the insulating member may be between the electrode assembly 110 and the cover plate 131. The insulating member may include a first lower insulating member 160 and a second lower insulating member 170, and each of the first lower insulating member 160 and the second lower insulating member 170 may also have a portion located between the electrode assembly 110 and the housing 120.

[0077] In addition, according to one or more embodiments of the present disclosure, one end of the separating member 180 or 190 may face one side of the electrode assembly 110, and may be between one of the insulating members 160 and 170 and the corresponding one of the positive electrode terminal 121 and the negative electrode terminal 122.

[0078] In one or more embodiments, the separating member may include a first separating member 180 and a second separating member 190.

[0079] In one or more embodiments, the first ends of the first separating member 180 and the second separating member 190 on the side facing the electrode assembly 110 may be mounted between one of the first lower insulating member 160 and the second lower insulating member 170 and the corresponding one of the positive electrode terminal 121 and the negative electrode terminal 122.

[0080] Accordingly, the positive electrode terminal 121 and the negative electrode terminal 122 that can be respectively connected to the positive electrode current collector 140 and the negative electrode current collector 150 by welding may be respectively connected to the first lower insulating member 160 and the second lower insulating member 170 and respectively connected to the first ends of the first separating member 180 and the second separating member 190.

[0081] Figure 2 Illustrate a perspective view of a battery module according to one or more embodiments of the present disclosure.

[0082] Reference Figure 2 , according to one or more embodiments of the present disclosure, the battery module 200 includes electrode terminals 121 and 122, a plurality of battery cells 100 (including battery cells 100a, 100b, etc.) arranged in one direction, a plurality of connection tabs 220 each connecting the battery cell 100a to an adjacent battery cell 100b, and a protection circuit module 230 connected to the connection tabs 220. The protection circuit module 230 may include a battery management system (BMS). In one or more embodiments, each connection tab 220 may include a main body portion in contact with the electrode terminals 121 and 122 of the adjacent battery cells 100a and 100b and an extension portion extending from the main body portion and connected to the protection circuit module 230. The connection tab 220 may be, for example, a bus bar.

[0083] Each battery cell 100 may include a battery case, an electrode assembly received (or accommodated) in the battery case, and an electrolytic solution. The electrode assembly and the electrolytic solution undergo an electrochemical reaction to store and release (e.g., generate) energy. An electrode terminal 121 and 122 electrically connected to the connection tab 220 and a cell exhaust portion 134 configured to form a discharge passage for gas generated inside the battery case may be provided on one side (e.g., the upper side) of the battery cell 100. The electrode terminals 121 and 122 of the battery cell 100 may be a positive electrode terminal 121 and a negative electrode terminal 122 having different polarities from each other, and the electrode terminals 121 and 122 of adjacent battery cells 100a and 100b may be electrically connected in series or in parallel to each other through the connection tab 220, which will be described in more detail below. Although the series connection has been described as an example, the connection structure is not limited thereto, and various connection structures may be adopted in other embodiments. In addition, the number and arrangement of the battery cells are not limited to Figure 2 the structure shown in, and may be changed according to desires or needs.

[0084] A plurality of battery cells 100 may be arranged in one direction (e.g., may be stacked in one direction) such that the wide surfaces of the battery cells 100 face each other, and the plurality of battery cells 100 may be fixed by the outer cases 261, 262, 263, and 264. The outer cases 261, 262, 263, and 264 may include a pair of end plates 261 and 262 facing the wide surfaces of the battery cells 100, a pair of side plates 263 facing the narrow surfaces of the battery cells 100, and a bottom plate 264 connecting the pair of end plates 261 and 262 to each other. The side plates 263 may support the side surfaces (i.e., the narrow surfaces) of the battery cells 100, and the bottom plate 264 may support the bottom surfaces of the battery cells 100. In addition, the pair of end plates 261 and 262, the side plates 263, and the bottom plate 264 may be connected by bolts 265 and / or any other suitable fastening members and / or methods known to those of ordinary skill in the art.

[0085] The protection circuit module 230 may have electronic components and a protection circuit mounted thereon and may be electrically connected to the connection tab 220, which will be described in more detail later. The protection circuit module 230 includes a first protection circuit module 230a and a second protection circuit module 230b that extend in a direction along which a plurality of battery cells 100 are arranged at different positions (e.g., extend along the Y direction). The first protection circuit module 230a and the second protection circuit module 230b may be spaced apart from each other at a suitable interval (e.g., a predetermined interval) (e.g., in the X direction) and arranged parallel (or substantially parallel) to each other to be electrically connected to different sets of connection tabs 220. In one or more embodiments, the first protection circuit module 230a extends in a direction along which the plurality of battery cells 100 are arranged (e.g., the Y direction) on one side of the upper portion of the plurality of battery cells 100, and the second protection circuit module 230b extends in a direction along which the plurality of battery cells 100 are arranged on the other side of the upper portion of the plurality of battery cells 100. The second protection circuit module 230b may be spaced apart from the first protection circuit module 230a at a suitable interval (e.g., a predetermined interval) when the cell exhaust portion 134 is between the first protection circuit module 230a and the second protection circuit module 230b. The cell exhaust portion 134 may be parallel to the first protection circuit module 230a and the second protection circuit module 230b. Accordingly, the two protection circuit modules 230a, 230b are spaced apart from each other side by side in a direction (e.g., the X direction) intersecting the direction along which the plurality of battery cells 100 are arranged (e.g., the Y direction), thereby reducing or minimizing the area of the printed circuit board (PCB) constituting the protection circuit module. By separately configuring the protection circuit module into two protection circuit modules 230a, 230b, it is possible to reduce or minimize the unnecessary PCB area. In addition, the first protection circuit module 230a and the second protection circuit module 230b may be connected to each other through a conductive connection member 250. One side of the conductive connection member 250 is connected to the first protection circuit module 230a, and the other side of the conductive connection member 250 is connected to the second protection circuit module 230b, such that the two protection circuit modules 230a and 230b can be electrically connected to each other.

[0086] The connection may be performed by soldering, resistance welding, laser welding, projection welding, and / or any other suitable connection method known to those of ordinary skill in the art.

[0087] In one or more embodiments, the connection member 250 may be, for example, an electric wire. Additionally, the connection member 250 may be made of an elastic or flexible material. The connection member 250 is capable of checking and / or managing whether the voltages, temperatures, and / or currents of the plurality of battery cells 100 are normal. In one or more embodiments, the information (such as voltage, current, and / or temperature) received by the first protection circuit module 230a from the connection tab 220 adjacent to the first protection circuit module 230a and the information (such as voltage, current, and / or temperature) received by the second protection circuit module 230b from the connection tab 220 adjacent to the second protection circuit module 230b may be integrated and managed by the protection circuit module 230 via the connection member 250.

[0088] Additionally, when the battery cell 100 expands, due to the elasticity or flexibility of the connection member 250, the impact can be absorbed, thereby preventing damage to the first protection circuit module 230a and the second protection circuit module 230b.

[0089] Additionally, the shape and structure of the connection member 250 are not limited to Figure 2 the shape and structure shown in

[0090] As described above, since the protection circuit module 230 is provided as the first protection circuit module 230a and the second protection circuit module 230b, the area of the PCB of the protection circuit module 230 can be reduced or minimized, and the space inside the battery module 200 can be accessed, which improves work efficiency by facilitating the connection between the connection tab 220 and the protection circuit module 230 and facilitating the performance of repair work when an abnormality is detected in the battery module 200.

[0091] Figure 3A and Figure 3B shows a battery pack according to one or more embodiments of the present disclosure.

[0092] The battery pack 300 may include a plurality of battery modules 200 and a housing 310 for accommodating the plurality of battery modules 200. In one or more embodiments, the housing 310 may include a first housing 311 and a second housing 312 coupled in opposite directions (e.g., upward and downward directions) around the plurality of battery modules 200. The plurality of battery modules 200 may be electrically connected to each other by using a bus bar 251 ( Figure 3B shown in

[0093] Figure 4A and Figure 4B shows a vehicle body and a vehicle having a battery pack according to one or more embodiments of the present disclosure.

[0094] In Figure 4A it, the battery pack 300 may include a battery pack cover 311' that is part of the vehicle bottom 410 and a group frame 312' below the vehicle bottom 410. The group frame 312' and the battery pack cover 311' may be integrated with the vehicle floor panel 420 of the vehicle.

[0095] The vehicle bottom 410 separates the interior and exterior of the vehicle, and the group frame 312' may be outside the vehicle.

[0096] Figure 4B is a schematic side view of a vehicle according to one or more embodiments of the present disclosure.

[0097] The vehicle 500 may be formed by combining additional parts (such as a hood 510 in front of the vehicle and bumpers 520 located in front of and behind the vehicle, respectively) to the vehicle body 400.

[0098] The vehicle 500 may further include a vehicle floor panel 420 as one of the vehicle body parts including the battery pack 300, and the battery pack 300 includes a group frame 312' and a battery pack cover 311'.

[0099] Figures 5A to 5D Illustrate a method for charging a secondary battery according to an embodiment of the present disclosure. The secondary battery may be charged and discharged, for example, by:

[0100] <<CCCV (constant current constant voltage) charging>>

[0101] CCCV charging is a charging method that performs constant current (CC) charging until the voltage reaches a suitable voltage or reference voltage (e.g., a predetermined voltage) and then performs constant voltage (CV) charging until the flowing current amount decreases until a final current value is achieved.

[0102] During CC charging, as Figure 5A shown, the switch of the constant current power supply is turned on and the switch of the constant voltage power supply is turned off, so that a constant (or substantially constant) current I flows through the secondary battery. During CC charging, since the current I is constant, according to Ohm's law (V R = R×I), the voltage VR applied to the internal resistor R is also constant. In addition, the voltage V C applied to the secondary battery capacitor C increases with time. Therefore, the secondary battery voltage V B can increase with time.

[0103] When the secondary battery voltage V B reaches a suitable voltage or reference voltage (e.g., a predetermined voltage) (e.g., approximately (substantially) 4.3V) (or if the secondary battery voltage VB When the appropriate voltage or reference voltage (e.g., a predetermined voltage) (e.g., approximately (substantially) 4.3 V) is reached, the CC charging switches to CV charging. During CV charging, as Figure 5B shown, the switch of the constant voltage power supply is turned on and the switch of the constant current power supply is turned off, so that the secondary battery voltage V B is constant (or substantially constant). The voltage V C applied to the secondary battery capacitor C increases with time. Since V B = V R + V C , the voltage V R applied to the internal resistor R decreases with time. As the voltage VR applied to the internal resistor R decreases, according to Ohm's law (V R = R×I), the current I flowing through the secondary battery can also decrease.

[0104] When the current I flowing through the secondary battery reaches the appropriate current or reference current (e.g., a predetermined current) (e.g., approximately (substantially) 0.01 C) (or if the current I flowing through the secondary battery reaches the appropriate current or reference current (e.g., a predetermined current) (e.g., approximately (substantially) 0.01 C)), the charging terminates. When the CCCV charging is completed (or if the CCCV charging is completed), all switches are turned off and the current I becomes 0, as Figure 5C shown. Therefore, the voltage VR applied to the internal resistor R becomes 0 V (or substantially 0 V). Accordingly, even when preventing the voltage drop across the internal resistor R, the secondary battery voltage V B basically does not decrease (e.g., the secondary battery voltage V B is substantially constant).

[0105] Figure 5D Shows the graph of the secondary battery voltage V B and the charging current during and after the CCCV charging termination. As Figure 5D shown, after the CCCV charging termination, the secondary battery voltage V B basically does not decrease (e.g., after the CCCV charging termination, the secondary battery voltage V B is substantially constant).

[0106] Figure 6 is a perspective view showing the battery module 200A according to an embodiment of the present disclosure, Figure 7 is Figure 6 an enlarged view of a partial area of Figure 8 is from Figure 6 a part of Figure 9 is cut and enlarged perspective sectional view, and Figure 7 is an enlarged sectional view cut from a part of

[0107] As Figures 6 to 9 shown, the battery module 200A according to an embodiment of the present disclosure may include a plurality of battery cells 100, a heat-resistant portion 270, a bus bar bracket 280, and a bus bar 220.

[0108] The plurality of battery cells 100 may be arranged in a horizontal direction (e.g., along the Y-axis direction).

[0109] As described above, the plurality of battery cells 100 may be on the cooling member 273. Additionally, as described above, the plurality of battery cells 100 may be fixed by the outer casings 261, 262, and 263 (see Figure 2 ). In one or more embodiments, the side casing 263 may include an opening, so that some side portions of the battery cells 100 may be exposed to the outside through the opening.

[0110] As described above, each of the plurality of battery cells 100 may include a cell exhaust portion 134 (or an exhaust portion), a positive electrode terminal 121, and a negative electrode terminal 122 (see Figure 1A , Figure 1B and Figure 2 ). In one or more embodiments, for each battery cell 100, the positive electrode terminal 121 and the negative electrode terminal 122 may be on opposite sides of the cell exhaust portion 134.

[0111] The heat-resistant portion 270 may be poured on the plurality of battery cells 100. The heat-resistant portion 270 may include a plurality of heat-resistant exhaust portions 271 and heat-resistant support portions 272 (see Figure 9 ). The heat-resistant exhaust portions 271 may be provided in one or more regions corresponding to the cell exhaust portions 134 of the battery cells 100 (e.g., the heat-resistant exhaust portions 271 may be aligned or substantially aligned with the cell exhaust portions 134). Each heat-resistant exhaust portion 271 may include a substantially flat upper surface 2711 and a substantially flat lower surface 2712 opposite to the upper surface 2711. The heat-resistant support portions 272 may be outside the heat-resistant exhaust portions 271. The heat-resistant support portions 272 may include a substantially flat upper surface 2721 and a substantially flat lower surface 2722 opposite to the upper surface 2721. In one or more embodiments, the heat-resistant support portions 272 may be between the plurality of battery cells 100 and the bus bar bracket 280. In one or more embodiments, the heat-resistant support portions 272 may be on (e.g., directly on) the cover plate 131 of the battery cells 100.

[0112] Each heat-resistant exhaust portion 271 may include a notch 2713 having a depth. In one or more embodiments, the notch 2713 may extend downward from the upper surface 2711 of the heat-resistant exhaust portion 271 toward the lower surface 2712. In one or more embodiments, the notch 2713 may gradually decrease in width from the upper surface 2711 of the heat-resistant exhaust portion 271 toward the lower surface 2712 of the heat-resistant exhaust portion 271.

[0113] In one or more embodiments, the depth of the notch 2713 may be approximately 1 / 3 to approximately 2 / 3 of the total thickness of the heat-resistant exhaust portion 271. If the depth of the notch 2713 is less than approximately 1 / 3 of the total thickness of the heat-resistant exhaust portion 271, when an event (e.g., flame emission) occurs in any one of the battery cells 100, the heat-resistant exhaust portion 271 may not rupture, and thus the internal flame of the battery cell 100 may not be discharged to the outside. If the depth of the notch 2713 is greater than approximately 2 / 3 of the total thickness of the heat-resistant exhaust portion 271 (deeper than that), the heat-resistant exhaust portion 271 may be too easily ruptured when a relatively small external impact is applied to the battery module 200A or the battery cell 100.

[0114] In one or more embodiments, the planar shape of the notch 2713 may include a single straight line, multiple parallel straight lines, or a cross shape. Due to the shape of the notch 2713, when an event occurs in the battery cell 100, the heat-resistant exhaust portion 271 can be easily ruptured, and the internal flame of the battery cell 100 can be discharged to the outside.

[0115] In one or more embodiments, each heat-resistant exhaust portion 271 may be adjacent to (e.g., in direct contact with) and / or adhered to one of the cell exhaust portions 134 of the battery cell 100. Thus, when the cell exhaust portion 134 of the battery cell 100 ruptures, the corresponding heat-resistant exhaust portion 271 can also be easily ruptured.

[0116] In one or more embodiments, the thickness of the heat-resistant exhaust portion 271 (or at least the thickness of the heat-resistant exhaust portion 271 at the notch 2713) may be less than the thickness of the heat-resistant support portion 272. In one or more embodiments, the upper surface 2711 of the heat-resistant exhaust portion 271 may be higher than the upper surface 2721 of the heat-resistant support portion 272. In one or more embodiments, the heat-resistant exhaust portion 271 may protrude upward from the heat-resistant support portion 272. In one or more embodiments, the upper surface 2711 of the heat-resistant exhaust portion 271 may be coplanar (or substantially coplanar) with the upper surface 2721 of the heat-resistant support portion 272. In one or more embodiments, the lower surface 2712 of the heat-resistant exhaust portion 271 may be lower than the lower surface 2722 of the heat-resistant support portion 272. In one or more embodiments, the heat-resistant exhaust portion 271 may protrude downward from the heat-resistant support portion 272.

[0117] In one or more embodiments, the single-cell exhaust portion 134 may be coupled to the single-cell exhaust hole 1311 of the battery cell 100, and the corresponding heat-resistant exhaust portion 271 may be coupled to or inserted into the single-cell exhaust hole 1311. In one or more embodiments, the single-cell exhaust portion 134 may be coupled to a substantially central region of the single-cell exhaust hole 1311 in the height direction (e.g., the Z-axis direction), and the heat-resistant exhaust portion 271 coupled to the single-cell exhaust hole 1311 may extend to the substantially central region. In one or more embodiments, the single-cell exhaust portion 134 may be coupled to a substantially lower region (e.g., the lower part) of the single-cell exhaust hole 1311 in the height direction (e.g., the Z-axis direction), and the heat-resistant exhaust portion 271 may extend to the substantially lower region of the single-cell exhaust hole 1311.

[0118] In one or more embodiments, the heat-resistant portion 270 may include an epoxy material or a silicone material. In one or more embodiments, the epoxy material may include an epoxy resin, a curing agent, and an inorganic filler. In one or more embodiments, the silicone material may include a silicone resin, a curing agent, and an inorganic filler. The weight ratio of the inorganic filler with respect to the heat-resistant portion 270 may be from approximately 5 wt% to approximately 95 wt%. If the weight ratio of the inorganic filler is less than approximately 5 wt%, processability is excellent due to low viscosity, but heat resistance may decrease. If the weight ratio of the inorganic filler is greater than approximately 95 wt%, heat resistance is excellent, but processability may decrease due to high viscosity. The inorganic filler may include nano- or micro-scale silica, alumina, glass fiber, magnesia, etc.

[0119] The bus bar support 280 may be on (e.g., directly on) the heat-resistant part 270. The bus bar support 280 may include a substantially flat upper surface 2801 and a substantially flat lower surface 2802 opposite to the upper surface 2801. In one or more embodiments, the lower surface 2802 of the bus bar support 280 may be in close contact with (e.g., contact or directly contact) the upper surface 2721 of the heat-resistant support part 272. In one or more embodiments, the upper surface 2801 of the bus bar support 280 may be exposed to the outside. In one or more embodiments, the bus bar support 280 may include support exhaust holes 281 in an area corresponding to the position of the heat-resistant exhaust part 271 and bus bar holes 282 in areas corresponding to the positions of the positive electrode terminal 121 and the negative electrode terminal 122 of each battery cell 100. The bus bar support 280 may be or include an insulating member or an insulating plate. The bus bar support 280 may include polyethylene terephthalate (PET), high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), or polyvinyl chloride (PVC). The bus bar support 280 supports a plurality of bus bars 220 to be described later and prevents the battery cells 100 from directly electrically contacting or mechanically contacting various electrical components located outside the battery module 200A.

[0120] In one or more embodiments, each heat-resistant exhaust part 271 may protrude upward from the heat-resistant support part 272. In one or more embodiments, the heat-resistant exhaust part 271 may be coupled to or inserted into the support exhaust holes 281 of the bus bar support 280. In one or more embodiments, the lower surface 2712 of the heat-resistant exhaust part 271 may be lower than the lower surface 2722 of the heat-resistant support part 272. In one or more embodiments, the heat-resistant exhaust part 271 may protrude downward from the heat-resistant support part 272.

[0121] In one or more embodiments, the upper surface 2711 of each heat-resistant exhaust part 271 may be higher than the upper surface 2801 of the bus bar support 280. In one or more embodiments, the upper surface 2711 of the heat-resistant exhaust part 271 may be coplanar (or substantially coplanar) with the upper surface 2801 of the bus bar support 280. In one or more embodiments, the upper surface 2711 of each heat-resistant exhaust part 271 and the upper surface 2721 of the heat-resistant support part 272 may be coplanar (or substantially coplanar) with each other. In one or more embodiments, the upper surface 2711 of each heat-resistant exhaust part 271 may be coplanar (or substantially coplanar) with the lower surface 2802 of the bus bar support 280. In one or more embodiments, the upper surface 2711 of each heat-resistant exhaust part 271 may be located below the support exhaust holes 281.

[0122] A plurality of busbars 220 may be on the heat-resistant portion 270 and electrically connected to the positive electrode terminals 121 and negative electrode terminals 122 of the plurality of battery cells 100. In one or more embodiments, one busbar 220 may be electrically connected to the positive electrode terminal 121 of the battery cell 100a on one side (see Figure 2 ) and the negative electrode terminal 122 of the battery cell 100b on the other side (see Figure 2 ) such that the battery cells 100 are connected in series. In one or more embodiments, one busbar 220 may be electrically connected to the positive electrode terminal 121 (or negative electrode terminal 122) of the battery cell 100a on one side and the positive electrode terminal 121 (or negative electrode terminal 122) of the battery cell 100b on the other side such that the battery cells 100 are connected in parallel. In one or more embodiments, each busbar 220 may be located in one of the busbar holes 282 of the busbar bracket 280.

[0123] Figure 10 is a flowchart showing a method for manufacturing a battery module 200A according to an embodiment of the present disclosure. Referring to Figures 6 to 10 , a method for manufacturing an exemplary battery module 200A according to an embodiment of the present disclosure may include the following steps: (S11) providing a plurality of battery cells 100; (S12) pouring the heat-resistant portion 270; (S13) providing a busbar bracket 280; and (S14) providing a plurality of busbars 220.

[0124] In the step (S11) of providing a plurality of battery cells 100, a plurality of battery cells 100 arranged in the horizontal direction (e.g., the Y-axis direction) may be provided. In one or more embodiments, each of the plurality of battery cells 100 may include a cell exhaust portion 134, a positive electrode terminal 121, and a negative electrode terminal 122.

[0125] In the step (S12) of pouring the heat-resistant portion 270, the heat-resistant portion 270 can be poured onto a plurality of battery cells 100. In one or more embodiments, a liquid heat-resistant epoxy material or silicone material can be poured through a dispenser and then cured. In one or more embodiments, the heat-resistant material can be naturally cured for approximately 5 minutes to approximately 20 minutes. In one or more embodiments, heat and / or light can be additionally provided to rapidly cure the heat-resistant material. After the curing process, the heat-resistant portion 270 is substantially flat on the plurality of battery cells 100. The heat-resistant portion 270 can include a heat-resistant exhaust portion 271 provided in a region corresponding to the position of the cell exhaust portion 134 of the battery cell 100 and a heat-resistant support portion 272 provided on the cover plate 131 of the battery cell 100 outside the heat-resistant exhaust portion 271. In one or more embodiments, before the heat-resistant portion 270 is cured, a straight or cross-shaped notch 2713 can be formed on or in the heat-resistant exhaust portion 271. In one or more embodiments, before the heat-resistant portion 270 is cured, a grooving tool can be pressed onto the heat-resistant exhaust portion 271 to provide a notch 2713 with a depth in each heat-resistant exhaust portion 271. In one or more embodiments, the heat-resistant portion 270 may not be provided in regions corresponding to the positive electrode terminal 121 and the negative electrode terminal 122 of each battery cell 100. In one or more embodiments, the heat-resistant portion 270 can be poured and cured around the positive electrode terminal 121 and the negative electrode terminal 122 of each battery cell 100, so that the heat-resistant portion 270 can be exposed to the outside. In one or more embodiments, when pouring the heat-resistant material, a fence or boundary member can be installed around the upper surface of the battery cell 100 to prevent the heat-resistant material from flowing into unwanted areas.

[0126] In the step (S13) of providing the bus bar support 280, the bus bar support 280 can be provided on the heat-resistant portion 270. In one or more embodiments, the bus bar support 280 can be provided before the heat-resistant portion 270 is cured. In one or more embodiments, the bus bar support 280 can be provided after the heat-resistant portion 270 is cured. In one or more embodiments, the bus bar support 280 can include a support exhaust hole 281 in a region corresponding to the heat-resistant exhaust portion 271 and bus bar holes 282 in regions corresponding to the positive electrode terminal 121 and the negative electrode terminal 122 of each battery cell 100.

[0127] In the step (S14) of providing the bus bar 220, the positive electrode terminal 121 and the negative electrode terminal 122 of each of the plurality of battery cells 100 can be connected to the bus bar 220 on the heat-resistant portion 270. In one or more embodiments, the positive electrode terminal 121 of the battery cell 100a on one side (see Figure 2 ) and the battery cell 100b on the other side (see Figure 2) The negative electrode terminal 122 can be connected to the bus bar 220 so that the battery cells 100 are connected in series. In one or more embodiments, the positive electrode terminals 121 of the battery cells 100a on one side and the positive electrode terminals 121 of the battery cells 100b on the other side can be connected to the bus bar 220 so that the battery cells 100 are connected in parallel.

[0128] Figure 11 is a flowchart showing a method for manufacturing a battery module 200A according to an embodiment of the present disclosure. Refer to Figures 6 to 9 and Figure 11 , a method for manufacturing a battery module 200A according to an embodiment of the present disclosure may include the following steps: (S21) providing a plurality of battery cells 100; (S22) providing a bus bar bracket 280; (S23) pouring a heat-resistant portion 270; and (S24) providing a plurality of bus bars 220. Except for the order change of the steps of providing the bus bar bracket 280 and pouring the heat-resistant portion 270, Figure 11 the manufacturing method shown in Figure 10 is the same as or similar to the manufacturing method shown in

[0129] In the step (S22) of providing the bus bar bracket 280, the bus bar bracket 280 can be provided on the plurality of battery cells 100. In one or more embodiments, the bus bar bracket 280 may include a plurality of bracket exhaust holes 281 provided in a region corresponding to the cell exhaust portion 134 of the battery cell 100 and a plurality of bus bar holes 282 provided in a region corresponding to the positive electrode terminal 121 and the negative electrode terminal 122 of the battery cell 100.

[0130] In the step of pouring the heat-resistant portion 270 (S23), the heat-resistant portion 270 can be poured into the space between the plurality of battery cells 100 and the bus bar bracket 280. In one or more embodiments, a liquid heat-resistant epoxy material or silicone material can be poured into the space between the plurality of battery cells 100 and the bus bar bracket 280 through a dispenser and then cured. After the curing process, the heat-resistant portion 270 can be substantially flat and can be provided between the plurality of battery cells 100 and the bus bar bracket 280. The heat-resistant portion 270 can include a plurality of heat-resistant exhaust portions 271, and each heat-resistant exhaust portion 271 can be provided in a region corresponding to one of the cell exhaust portions 134 in one of the battery cells 100 and the corresponding bracket exhaust hole 281 of the bus bar bracket 280. The heat-resistant portion 270 can also include a heat-resistant support portion 272 provided between one of the battery cells 100 and the bus bar bracket 280 outside the corresponding heat-resistant exhaust portion 271. In one or more embodiments, a straight or cross-shaped notch 2713 can be provided on the heat-resistant exhaust portion 271 before curing the heat-resistant portion 270. In one or more embodiments, a grooving tool can be pressed onto the heat-resistant exhaust portion 271 before curing the heat-resistant portion 270 to provide a notch 2713 having a depth. In one or more embodiments, when pouring the heat-resistant material, a fence or boundary member can be installed around the battery cells 100 and the bus bar bracket 280 to prevent the heat-resistant material from flowing into unwanted areas.

[0131] Although the present disclosure has been described through limited embodiments and drawings, the present disclosure is not limited thereto. However, those skilled in the art to which the present disclosure pertains can make various modifications and variations within the scope of equivalents of the technical idea of the present disclosure and within the scope of the present invention as set forth in the claims.

Claims

1. A battery module, comprising: A plurality of battery cells arranged in a horizontal direction, each of the plurality of battery cells comprising a cell vent, a positive electrode terminal, and a negative electrode terminal; a heat-resistant portion poured on the plurality of battery cells, the heat-resistant portion including a heat-resistant vent portion in a region corresponding to the cell vent portion of each of the plurality of battery cells and a heat-resistant support portion outside the heat-resistant vent portion; a bus bar holder on the heat-resistant portion, the bus bar holder including a holder vent hole in a region corresponding to the heat-resistant vent portion and a bus bar hole in a region corresponding to the positive electrode terminal and the negative electrode terminal of each of the plurality of battery cells; as well as A plurality of bus bars are on the heat-resistant portion and connected to the positive electrode terminals and the negative electrode terminals of the plurality of battery cells. 2 . The battery module according to claim 1 , wherein the heat-resistant vent comprises a notch. 3 . The battery module according to claim 2 , wherein a depth of the notch is 1 / 3 to 2 / 3 of a thickness of the heat-resistant vent portion. The battery module according to claim 2 , wherein a planar shape of the recess comprises a cross shape. 5 . The battery module according to claim 1 , wherein the heat-resistant vent portion contacts the cell vent portion. 6 . The battery module according to claim 1 , wherein a thickness of the heat-resistant vent portion is greater than a thickness of the heat-resistant support portion. 7 . The battery module according to claim 1 , wherein the heat-resistant vent portion protrudes downward from the heat-resistant supporting portion. 8 . The battery module according to claim 1 , wherein the cell vent is coupled to a lower portion of a cell vent hole of each of the plurality of battery cells, and wherein the heat-resistant vent is coupled to the cell vent hole. 9 . The battery module according to claim 1 , wherein the heat-resistant portion comprises an epoxy material or a silicone material. 10 . The battery module according to claim 1 , wherein an upper surface of the heat-resistant vent portion and an upper surface of the heat-resistant support portion are coplanar. 11 . The battery module according to claim 1 , wherein the heat-resistant vent portion protrudes upward from the heat-resistant supporting portion. 12 . The battery module according to claim 1 , wherein the heat-resistant vent portion is coupled to the bracket vent hole. 13 . The battery module according to claim 1 , wherein an upper surface of the heat-resistant vent portion is coplanar with an upper surface of the bus bar support.

14. A method for manufacturing a battery module, the method comprising: providing a plurality of battery cells arranged in a horizontal direction, each of the plurality of battery cells including a cell vent, a positive electrode terminal, and a negative electrode terminal; pouring heat-resistant portions on the plurality of battery cells, the heat-resistant portions including heat-resistant vent portions in regions corresponding to the cell vent portions and heat-resistant support portions outside the heat-resistant vent portions; providing a bus bar holder on the heat-resistant portion, the bus bar holder including a holder vent hole in a region corresponding to the heat-resistant vent portion and a bus bar hole in a region corresponding to the positive electrode terminal and the negative electrode terminal; as well as A plurality of bus bars are provided on the heat-resistant portion and connect the positive electrode terminal and the negative electrode terminal of each of the plurality of battery cells.

15. A method for manufacturing a battery module, the method comprising: providing a plurality of battery cells arranged in a horizontal direction, each of the plurality of battery cells including a cell vent, a positive electrode terminal, and a negative electrode terminal; providing a bus bar holder on the plurality of battery cells, the bus bar holder including a holder vent hole in a region corresponding to the cell vent and a bus bar hole in a region corresponding to the positive electrode terminal and the negative electrode terminal of each of the plurality of battery cells; pouring a heat-resistant portion between the plurality of battery cells and the bus bar support, the heat-resistant portion including a heat-resistant vent portion in an area corresponding to the cell vent portion and a heat-resistant support portion outside the heat-resistant vent portion; as well as A plurality of bus bars are provided on the heat-resistant portion and connect the positive electrode terminal and the negative electrode terminal of each of the plurality of battery cells.

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