Title of Invention: Battery module and battery pack including same
technical field
[One]
Cross-Citation with Related Application(s)
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2020-0039761 dated April 01, 2020, and all contents disclosed in the literature of the Korean patent application are incorporated as a part of this specification.
[3]
The present invention relates to a battery module and a battery pack including the same, and more particularly, to a battery module with enhanced stability and a battery pack including the same.
background
[4]
Secondary batteries are receiving a lot of attention as an energy source in various product groups such as mobile devices and electric vehicles. Such a secondary battery is a powerful energy resource that can replace the use of conventional products using fossil fuels, and is in the spotlight as an eco-friendly energy source because no by-products are generated due to energy use.
[5]
Recently, as the need for a large-capacity secondary battery structure, including the use of secondary batteries as an energy storage source, increases, the demand for a battery pack having a medium-to-large module structure in which a plurality of secondary batteries are assembled in series/parallel connected battery pack is increasing. .
[6]
On the other hand, when configuring a battery pack by connecting a plurality of battery cells in series/parallel, a battery module composed of at least one battery cell is configured, and other components are added using at least one battery module to form a battery pack. The way it is configured is common. Since the battery cells constituting the medium and large-sized battery module are composed of rechargeable batteries capable of charging and discharging, such high-output, large-capacity secondary batteries generate a large amount of heat during the charging and discharging process.
[7]
The battery module includes a battery cell stack in which a plurality of battery cells are stacked, a frame accommodating the battery cell stack, and an end plate covering front and rear surfaces of the battery cell stack.
[8]
1 is a view showing a state of ignition of a battery module mounted on a conventional battery pack. FIG. 2 is a view taken along line AA of FIG. 1 , showing a flame affecting an adjacent battery module when a battery module mounted on a conventional battery pack ignites.
[9]
1 and 2 , a conventional battery module includes a battery cell stack in which a plurality of battery cells 10 are stacked, a frame 20 for accommodating the battery cell stack, and front and rear surfaces of the battery cell stack. It includes an end plate 30 , a terminal bus bar 40 formed to protrude out of the end plate, and the like.
[10]
The frame 20 and the end plate 30 may be coupled to be sealed through welding. As described above, when the frame 20 accommodating the battery cell stack and the end plate 30 are combined, the internal pressure of the battery cell 10 increases when the battery module is overcharged, exceeding the fusion strength limit of the battery cell 10 . In this case, high-temperature heat, gas, and flame generated in the battery cell 10 may be discharged to the outside of the battery cell 10 .
[11]
At this time, high-temperature heat, gas, and flame may be discharged through openings formed in the end plate 30 . In the battery pack structure in which a plurality of battery modules are disposed so that the end plates 30 face each other, high-temperature heat, gas And it may affect the battery module adjacent to the battery module ejecting the flame. Through this, the terminal bus bar 40 formed on the end plate 30 of the neighboring battery module may be damaged, and high-temperature heat, gas, and flame may penetrate the battery through the opening formed in the end plate 30 of the neighboring battery module. It may enter the inside of the module and damage the plurality of battery cells 10 .
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[12]
SUMMARY OF THE INVENTION An object of the present invention is to provide a battery module capable of dispersing high-temperature heat and flames emitted when an ignition occurs in the battery module, and a battery pack including the same.
[13]
The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.
means of solving the problem
[14]
A battery module according to an embodiment of the present invention for realizing the above object includes: a battery cell stack in which a plurality of battery cells are stacked; a module frame for accommodating the battery cell stack; and an end plate that covers the front and rear surfaces of the battery cell stack and is coupled to the module frame, a venting part is formed on the upper surface of the module frame, and the battery cell includes: a cell body; electrode leads protruding from both ends of the cell body; and a terrace portion extending from the cell body in a direction in which the electrode lead protrudes, wherein the vent portion is formed adjacent to a portion where the terrace portion is located rather than the cell body.
[15]
In addition, the battery pack according to an embodiment of the present invention for realizing the above object, a first module frame for accommodating a first battery cell stack, covers the front and rear surfaces of the first battery cell stack, and the first module A first end plate coupled to a frame, a first terrace unit assembly extending from a plurality of battery cells of the first battery cell stack, and a first terminal bus bar and a first connector positioned on the first end plate a first battery module; and a second battery module adjacent to the first battery module, wherein a first venting part is formed on an upper surface of the first module frame, and the part where the first venting part is formed includes a part where the first terrace part assembly is located; A second end plate formed at a corresponding position and included in the second battery module includes a second terminal bus bar and a second connector, and the first battery module and the second battery module are connected to the first terminal bus bar and The second terminal bus bar is disposed to face each other, and the first connector and the second connector are disposed to face each other.
[16]
The venting part may be formed at a position corresponding to the part where the terrace part is located.
[17]
The end plate is formed of two end plates each covering the front and rear surfaces of the battery cell stack, and the venting part is formed to be vented in a direction opposite to that of the end plate located closer among the two end plates. can
[18]
The venting unit may include: an inlet formed on the upper surface of the module frame and facing the battery cell stack; and an outlet for discharging the gas introduced through the inlet, wherein the outlet may be formed in a direction perpendicular to the inlet.
[19]
The venting part may include a connecting part formed between the inlet and the outlet to guide the gas introduced into the inlet in a direction in which the outlet is located, and an upper surface of the connecting part may be formed to be inclined.
[20]
The venting part may be formed to be vented in an upward direction based on the battery cell stack.
[21]
The venting unit may include: an inlet connected to the battery cell stack and formed upwardly on the upper surface of the module frame; an outlet formed in an upward direction for discharging the gas introduced through the inlet; and a connecting portion connecting the inlet and the outlet, wherein the connecting portion may be formed in a direction perpendicular to the inlet and outlet directions of the inlet and the outlet.
[22]
The connection part may be formed with a foreign substance blocking part for blocking foreign substances entering through the outlet.
[23]
A plurality of the venting units may be formed at positions corresponding to the portions where the terrace units are located.
[24]
The venting unit may be formed such that a plurality of venting spaces having a rectangular shape are disposed on the upper surface of the module frame.
[25]
The venting part may be formed in the middle and both sides of the upper surface of the module frame, respectively.
[26]
The venting part may be formed in a hole structure obliquely penetrated through the upper surface of the module frame.
[27]
The venting part may be formed through the venting part at an angle to discharge gas in the direction of the end plate located farther from the vent part among the two end plates formed on the front and rear surfaces of the battery cell stack.
[28]
The first terminal bus bar and the second terminal bus bar may each have an opening formed at one side facing each other, and the first connector and the second connector may have an opening formed at one side facing each other.
[29]
The first venting part may be formed to discharge gas in a direction opposite to a direction in which the second battery module is located.
Effects of the Invention
[30]
A battery module and a battery pack including the same according to an embodiment of the present invention face the battery module by dispersing high-temperature heat, gas, and flame generated when the battery module is ignited through a vent formed on the upper surface of the module frame. It is possible to minimize damage to the terminal bus bar of the battery module and the plurality of battery cells.
[31]
Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.
Brief description of the drawing
[32]
1 is a view showing a state of ignition of a battery module mounted on a conventional battery pack.
[33]
FIG. 2 is a portion cut along line AA of FIG. 1, and is a view showing a flame affecting an adjacent battery module when a battery module mounted in a conventional battery pack ignites.
[34]
3 is an exploded perspective view illustrating a battery module according to an embodiment of the present invention.
[35]
4 is a perspective view illustrating a state in which the battery module of FIG. 3 is coupled and a venting part is formed in the battery module.
[36]
5 is a view showing a state in which battery modules are arranged in a battery pack according to an embodiment of the present invention and a state in which high-temperature heat, gas and flame are discharged from a venting part of the battery module.
[37]
FIG. 6 is a cross-sectional view taken along line BB of FIG. 5 and showing a state in which high-temperature heat, gas and flame are discharged from the venting part of the battery module in the battery pack according to an embodiment of the present invention.
[38]
7 is a view showing a state of a venting unit in the battery module according to another embodiment of the present invention.
[39]
8 is a cross-sectional view illustrating a state in which high-temperature heat, gas, and flame are discharged from a venting part of the battery module in the battery pack including the battery module of FIG. 7 .
[40]
9 is a view showing a venting part of a battery module according to another embodiment of the present invention.
[41]
10 is a view showing a venting part of the battery module according to another embodiment of the present invention.
[42]
11 is a view showing a venting part of a battery module according to another embodiment of the present invention.
Modes for carrying out the invention
[43]
It should be understood that the embodiments described below are illustratively shown to help understanding of the invention, and that the present invention may be implemented with various modifications different from the embodiments described herein. However, in the description of the present invention, if it is determined that a detailed description of a related known function or component may unnecessarily obscure the gist of the present invention, the detailed description and specific illustration thereof will be omitted. In addition, the accompanying drawings are not drawn to scale in order to help understanding of the invention, but dimensions of some components may be exaggerated.
[44]
The first and second terms used in the present application may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
[45]
In addition, the terms used in the present application are only used to describe specific embodiments, and are not intended to limit the scope of rights. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprises", "consists of" or "consisting It should be understood that it does not preclude the possibility of addition or existence of further other features or numbers, steps, operations, components, parts, or combinations thereof.
[46]
Hereinafter, a battery module in which the venting part 400 is formed according to an embodiment of the present invention will be described with reference to FIGS. 3 to 6 .
[47]
3 is an exploded perspective view illustrating a battery module according to an embodiment of the present invention. 4 is a perspective view illustrating a state in which the battery module of FIG. 3 is coupled and a venting part is formed in the battery module. 5 is a view showing a state in which battery modules are arranged in a battery pack according to an embodiment of the present invention and a state in which high-temperature heat, gas, and flame are discharged from a venting part of the battery module. FIG. 6 is a cross-sectional view taken along line BB of FIG. 5 and showing a state in which high-temperature heat, gas, and flame are discharged from the battery module and the vent formed therein according to an embodiment of the present invention.
[48]
3 to 6 , the battery module according to an embodiment of the present invention is formed of a battery cell stack 120 in which a plurality of battery cells 110 are stacked, top, bottom, left, and right surfaces, and thus a battery cell stack. The module frame 200 for accommodating 120 and the first and second end plates 300 each covering the front and rear surfaces of the battery cell stack 120 and including the module mounting part 310 are included, and the module frame A venting part 400 for discharging gas generated from the plurality of battery cells 110 to the outside is formed on the upper surface of 200 .
[49]
The battery cell 110 includes a cell body 111 , an electrode lead 112 protruding from both ends of the cell body 111 , and a terrace portion extending from the cell body 111 in a direction in which the electrode lead 112 protrudes. 113). The venting part 400 according to this embodiment is formed closer to the portion where the terrace part 113 is located than the cell body 111, so that high-temperature heat, gas, and flame are immediately discharged to the outside of the battery module 100. can For example, the venting part 400 may be formed at a position corresponding to the terrace part 113 .
[50]
The venting part 400 may be formed such that gas is discharged in a direction opposite to that of the closer end plate among the first and second end plates 300 .
[51]
The battery cell 110 is a secondary battery and may be configured as a pouch-type secondary battery. The battery cells 110 may be configured in plurality, and the plurality of battery cells 110 may be stacked to each other so as to be electrically connected to each other to form the battery cell stack 120 . Each of the plurality of battery cells 110 includes an electrode assembly, a cell body 111 accommodating the electrode assembly, and electrode leads 112 protruding from both ends of the electrode assembly.
[52]
The electrode assembly may include a positive electrode plate, a negative electrode plate, and a separator. The cell body 111 is for packaging the electrode assembly, and may be formed of a laminate sheet including a resin layer and a metal layer.
[53]
A terrace portion 113 formed to extend from the cell body 111 in a direction in which the electrode lead 112 protrudes is included between the electrode lead 112 and the cell body 111 . Specifically, the terrace portion 113 extending from the cell case covering the cell body 111 may be formed by sealing the end. The terrace portion 113 may be formed to surround the electrode lead 112 extending from the cell body 111 . The upper plate 130 may be located on the upper side of the battery cell stack 120 and connect the bus bar frames formed on the front and rear surfaces of the battery cell stack.
[54]
The module frame 200 may be formed to accommodate the battery cell stack 120 and the bus bar frame coupled thereto on upper, lower, left, and right surfaces of the battery cell stack 120 . A thermal conductive resin may be injected between the lower end of the battery cell stack 120 and the lower surface of the module frame 200, and the lower surface of the battery cell stack 120 and the module frame 200 through the injected thermal conductive resin. A thermally conductive resin layer may be formed between the lower surfaces of the Through the module frame 200 , the battery cell stack 120 accommodated in the module frame 200 and the electrical components connected thereto can be protected from external physical impact.
[55]
The end plate 300 is formed to cover the front and rear surfaces of the battery cell stack 120 . The end plate 300 protects the bus bar frame and various electrical components connected thereto from external impact, and includes a module mounting unit 310 capable of mounting the battery module to the battery pack. Terminal bus bar openings and connector openings for connecting terminal bus bars and connectors formed on the bus bar frame to the outside are formed in the end plate 300 , and gas generated from the battery cells may be discharged to the outside through the openings. The end plate 300 and the module frame 200 are coupled by welding, and the module frame 200 and the plurality of battery cells 110 located inside the end plate 300 are sealed through the end plate 300 by welding. With the module frame 200 coupled structure, except for the above-described openings, the connection to the outside may be blocked.
[56]
According to an embodiment of the present invention, the venting part 400 may be formed on the upper surface of the module frame 200 . The venting part 400 is formed at a position corresponding to the part where the terrace part 113 is located, and the sealed terrace part 113 part is released from sealing due to a change in internal pressure of the battery module, and high temperature heat, gas, and flame are released. When discharged, the high-temperature heat, gas, and flame may be immediately discharged to the outside through the venting unit 400 formed at a position corresponding to the portion where the terrace unit 113 is located.
[57]
In addition, conventionally, discharge is possible only through the openings formed in the end plate 300, so the discharge path inside the battery module is diversified to prevent the concentration of exhaust to only a part of the battery module when ignited, and high-temperature heat, Emissions of gases and flames can be dispersed.
[58]
In addition, the venting unit 400 is formed to be vented in a direction opposite to that of an end plate positioned closer among the first and second end plates 300 formed on each of the front and rear surfaces of the battery cell stack 120 . That is, the end plate formed in the portion adjacent to the electrode lead 112 connected to the terrace portion 113 formed at the position corresponding to the position of the venting portion 400 is more than the end plate located in the opposite side to the reference of the battery cell stack. Since it is close, if it is vented in the direction of an end plate located nearby, high-temperature heat, gas, and flame may be emitted to the end plate located nearby and other battery modules adjacent to it, which may damage other battery modules. Therefore, the venting direction of the venting part is formed to be vented in the direction in which the end plate located at a relatively distant part is located, so that damage to other adjacent battery modules can be minimized.
[59]
The venting part 400 according to an embodiment of the present invention is formed on the upper surface of the module frame 200 and is connected to the battery cell stack 120 , the inlet 410 , and the gas introduced through the inlet 410 . It includes an outlet 420 for discharging, and the outlet 420 may be formed in a direction perpendicular to the inlet 410 . In addition, the venting part 400 includes a connection part 430 formed between the inlet 410 and the outlet 420 to guide the gas introduced into the inlet 410 in the direction in which the outlet 420 is located, and the connecting part ( The upper surface of 430 may be inclined.
[60]
The outlet 420 is formed in a direction perpendicular to the inlet 410 and the upper surface of the module frame 200 to prevent foreign substances floating in the air from entering the outlet 420 by gravity. In addition, the upper surface of the connection part 430 is formed to be inclined toward the outlet, so that the high-temperature heat, gas and flame introduced into the inlet 410 is switched through the connection part 430 and naturally discharged through the outlet 420. have.
[61]
The battery module described above may be included in the battery pack. The battery pack according to an embodiment of the present invention covers the front and rear surfaces of the first module frame 200 accommodating the first battery cell stack 120 , and the first battery cell stack 120 , and includes the first module On the first end plate 300 coupled to the frame 200 , the first terrace unit assembly 113 and the first end plate 300 extending from the plurality of battery cells of the first battery cell stack 120 . A first battery module M1 including a first terminal bus bar 320 and a first connector 330 positioned therein and a second battery module M2 adjacent to the first battery module M1 are included. In this case, in the first terrace unit assembly 113 , terrace units extending from a plurality of stacked battery cells 110 may be gathered to form an assembly.
[62]
According to an embodiment of the present invention, the first venting part 400 is formed on the upper surface of the first module frame 200 , and the first terrace part assembly 113 is formed in the portion where the first venting part 400 is formed. The second end plate 300 ′ formed at a position corresponding to the positioned portion and included in the second battery module M2 includes a second terminal bus bar 320 ′ and a second connector 330 ′. The first venting part 400 may be formed to discharge gas in a direction opposite to the direction in which the second battery module M2 is located.
[63]
The first battery module M1 and the second battery module M2 have a first terminal bus bar 320 and a second terminal bus bar 320 ′ facing each other, and a first connector 330 and a second connector ( 330') are arranged to face each other. In this case, the first terminal bus bar 320 and the second terminal bus bar 320 ′ each have openings formed on one side facing each other, and the first connector 330 and the second connector 330 ′ each face each other. An opening may be formed at one side.
[64]
The second battery module (M2) disposed to face the high temperature heat, gas, and flame formed in the first battery module (M1) through the first terminal bus bar 320 and the first connector 330 having an opening formed therein The two-terminal bus bar 320 ′ and the second connector 330 ′ can be discharged to the second terminal bus bar 320 ′ and the second connector 330 ′ formed in the second battery module M2 at a high temperature. damage from heat, gas and flames may occur.
[65]
In addition, high-temperature heat, gas, and flame pass through the openings formed in the second terminal bus bar 320 ′ and the second connector 330 ′ to the battery cell stack 110 ′ inside the second battery module M2. may cause damage. According to an embodiment of the present invention, through the first venting portion 400 formed in the first battery module M1 , the first terminal bus bar 320 and the opening formed in the first connector 330 together with the first Since the high-temperature heat, gas, and flame generated from the terrace unit assembly 113 can be dispersed and discharged, the first terminal bus bar 320 and the second terminal bus bar disposed to face the first connector 330 ( 320') and the damage transmitted to the second connector 330' can be minimized.
[66]
The second battery module M2 includes a second module frame 200 ′ into which the second battery cell stack is inserted, and a second end plate that covers the front and rear surfaces of the second battery cell stack and is coupled to the second module frame ( 300'), and a second venting part may be formed on the upper surface of the second module frame 200'. In this case, the outlet of the second venting part may face a different direction from the outlet of the first venting part 400 .
[67]
In addition, the second battery module M2 further includes a second terrace unit assembly 113 ′ extending from the plurality of battery cells of the second battery cell stack, and the portion where the second venting unit is formed is the second terrace unit. It may be formed at a position corresponding to the position where the assembly 113 ′ is formed.
[68]
Hereinafter, a battery module in which the venting part 500 is formed according to another embodiment of the present invention will be described with reference to FIGS. 7 and 8 .
[69]
7 is a view showing a state of a venting unit in the battery module according to another embodiment of the present invention. 8 is a cross-sectional view illustrating a venting portion of the battery module in the battery pack including the battery module of FIG. 7 .
[70]
7 and 8 , the venting part 500 according to the present embodiment may be formed to be vented upward relative to the battery cell stack 120 . The venting unit 500 is connected to the battery cell stack 120 and has an inlet 510 formed in an upward direction on the upper surface of the module frame 200 and an outlet formed in an upward direction to discharge gas introduced through the inlet. 520 and a connecting portion 530 connecting the inlet 510 and the outlet 520, the connecting portion 530 being formed in a direction perpendicular to the inlet and outlet directions of the inlet 510 and the outlet 520. can
[71]
The venting unit 500 discharges high-temperature heat, gas, and flame inside the battery module toward the upper direction of the battery module, thereby minimizing damage to other battery modules disposed facing the end plate. However, the outlet 520 is formed toward the upper direction so that foreign substances in the air can enter the outlet 520 by gravity, the connection part 530 is formed in a direction perpendicular to the outlet 520 to the outlet 520 . A phenomenon in which foreign substances introduced into the battery module are introduced into the battery module through the inlet 510 may be minimized.
[72]
In addition, a foreign material blocking part 540 is formed on the connection part 530 to block foreign substances coming in through the outlet 520 to prevent foreign substances from entering the inlet 510 part through the connection part 530 from the outlet 520 part. can
[73]
The battery module described above may be included in the battery pack. The battery pack according to an embodiment of the present invention covers the front and rear surfaces of the first module frame 200 accommodating the first battery cell stack 120 , and the first battery cell stack 120 , and includes the first module On the first end plate 300 coupled to the frame 200 , the first terrace unit assembly 113 and the first end plate 300 extending from the plurality of battery cells of the first battery cell stack 120 . A first battery module M1 including a first terminal bus bar 320 and a first connector 330 positioned therein and a second battery module M2 adjacent to the first battery module M1 are included. In this case, in the first terrace unit assembly 113 , terrace units extending from a plurality of stacked battery cells 110 may be gathered to form an assembly.
[74]
According to an embodiment of the present invention, the first venting part 500 is formed on the upper surface of the first module frame 200 , and the first terrace part assembly 113 is formed in the portion where the first venting part 500 is formed. The second end plate 300 ′ formed at a position corresponding to the positioned portion and included in the second battery module M2 includes a second terminal bus bar 320 ′ and a second connector 330 ′. In this case, in the first battery module M1 and the second battery module M2 , the first terminal bus bar 320 and the second terminal bus bar 320 ′ face each other, and the first connector 330 and the second connector 330' are arranged to face each other.
[75]
Contents other than the above description with respect to the battery pack are the same as those described with respect to the battery pack in which the first venting part 400 is formed according to an embodiment of the present invention.
[76]
Hereinafter, a battery module in which the venting part 600 is formed according to another embodiment of the present invention will be described with reference to FIG. 9 .
[77]
9 is a view showing a venting part of a battery module according to another embodiment of the present invention.
[78]
As shown in FIG. 9 , in the venting unit 600 according to the present embodiment, a plurality of venting units 600 may be formed at positions corresponding to the portion where the terrace unit is located. Each of the venting units 600 may be formed at both ends and at the center of the upper surface of the module frame 200 , respectively. For example, since high-temperature heat, gas, and flame may be locally generated from a specific battery cell in a plurality of battery cells, such as high-temperature heat, gas, and flame generated in the outermost battery cell of the battery cell stack, FIG. And as shown in FIG. 6 , by disposing a plurality of venting units 600 along the portion where the terrace portion is formed, high-temperature heat, gas, and flame generated from the battery cell located in a specific portion is removed from the venting unit located closest to the battery cell. It can be quickly discharged to the outside through (600). According to this embodiment, the venting part 600 is formed in the middle and on both sides of the upper surface of the module frame 200, respectively, and high-temperature heat, gas, and flame generated in the battery cell adjacent to each venting part 600 . can be discharged outside.
[79]
The venting part 600 according to this embodiment is formed on the upper surface of the module frame 200 and is connected to the battery cell stacked body inlet 610, the outlet 620 for discharging the gas introduced through the inlet 610. ), and the outlet 620 may be formed in a direction perpendicular to the inlet 610 . In addition, the venting part 600 includes a connection part 630 formed between the inlet 610 and the outlet 620 and guiding the gas introduced into the inlet 610 in the direction in which the outlet 620 is located, and the connection part ( 630) may be formed to be inclined.
[80]
The outlet 620 is formed in a direction perpendicular to the inlet 610 and the upper surface of the module frame 200, thereby preventing foreign substances floating in the air from entering the outlet 620 due to gravity. In addition, the upper surface of the connection part 630 is formed to be inclined toward the outlet, so that the high-temperature heat, gas, and flame introduced into the inlet 610 are switched through the connection part 630 and naturally discharged through the outlet 620. have.
[81]
Hereinafter, a battery module in which the venting part 700 is formed according to another embodiment of the present invention will be described with reference to FIG. 10 .
[82]
10 is a view showing a venting part of the battery module according to another embodiment of the present invention.
[83]
Referring to FIG. 10 , the venting unit 700 according to the present embodiment may be formed such that a plurality of venting spaces having a rectangular shape are disposed on the upper surface of the module frame 200 . Simultaneous ignition phenomenon may occur from a plurality of battery cells, so that a plurality of rectangular venting spaces are disposed on the upper surface of the module frame 200 like the venting unit 700 according to another embodiment of the present invention. formed so that a significant amount of gas, heat and flame can be rapidly discharged to the outside.
[84]
Hereinafter, a battery module in which the venting part 800 is formed according to another embodiment of the present invention will be described with reference to FIGS. 3 and 11 .
[85]
11 is a view showing a venting part of a battery module according to another embodiment of the present invention.
[86]
3 and 11 , the venting part 800 formed in the battery module according to the present embodiment pumps gas in the direction of the end plate located farther from the venting part 800 among the two end plates formed at both ends of the battery module. It may be formed to discharge. In this case, the venting part 800 may have a hole structure formed on the upper surface of the module frame 200 , and further may have a hole structure that is obliquely penetrated to have an inclination.
[87]
The venting part 800 may be formed obliquely in the direction of the end plate positioned further from the venting part 800 among the two end plates 301 and 302 formed on the front and rear surfaces of the battery cell stack 120 . Specifically, the inner inlet of the obliquely penetrating venting portion 800 is formed closer to the 1-1 end plate 301 than the outer outlet, and the outer outlet is closer to the 1-2 end plate 302 than the inner inlet. can be formed.
[88]
Through the above structure, it is possible to naturally impart direction to the heat or gas discharged through the venting unit 800 . That is, the gas may be induced to be discharged in the direction of the first-second end plate 302 located further away, thereby preventing damage to other battery modules adjacent to the first-first end plate 301 .
[89]
In addition, the venting unit 800 according to the present embodiment does not require a separate additional space as a perforated hole structure, and has the advantage of providing the directionality of the discharged gas simply by passing through the module frame 200 . have.
[90]
The battery pack described above may have a structure in which one or more battery modules according to the present embodiment are collected and a battery management system (BMS) that manages the temperature or voltage of the battery and a cooling device are added and packed.
[91]
The battery pack may be applied to various devices. Such a device may be applied to transportation means such as an electric bicycle, an electric vehicle, and a hybrid vehicle, but the present invention is not limited thereto and can be applied to various devices that can use a battery module, which also falls within the scope of the present invention .
[92]
In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.
[93]
Explanation of symbols
[94]
110: battery cell
[95]
111: cell body
[96]
112: electrode lead
[97]
113: terrace unit (first terrace unit assembly)
[98]
113': Terrace part (second terrace part aggregate)
[99]
120: battery cell stack
[100]
130: upper plate
[101]
200: first module frame (module frame)
[102]
200': second module frame
[103]
300: first end plate (end plate)
[104]
301: 1-1 end plate
[105]
302: 1-2 end plate
[106]
300': second end plate
[107]
310: module mounting unit
[108]
320: first terminal bus bar
[109]
320': second terminal bus bar
[110]
330: first connector
[111]
330': second connector
[112]
400, 500, 600, 700, 800: venting part (first venting part)
[113]
410, 510, 610: inlet
[114]
420, 520, 620: outlet
[115]
430, 530, 630: connection part
[116]
540: foreign matter blocking unit
Claims
[Claim 1]
a battery cell stack in which a plurality of battery cells are stacked; a module frame for accommodating the battery cell stack; and an end plate that covers the front and rear surfaces of the battery cell stack and is coupled to the module frame, a venting part is formed on the upper surface of the module frame, and the battery cell includes: a cell body; electrode leads protruding from both ends of the cell body; and a terrace portion extending from the cell body in a direction in which the electrode lead protrudes, wherein the vent portion is formed adjacent to a portion where the terrace portion is located rather than the cell body.
[Claim 2]
The battery module of claim 1 , wherein the venting part is formed at a position corresponding to a part where the terrace part is located.
[Claim 3]
The method of claim 1, wherein the end plate is formed of two end plates each covering the front and rear surfaces of the battery cell stack, and the venting part is in a direction opposite to an end plate located closer among the two end plates. A battery module that is formed to be vented.
[Claim 4]
The method of claim 1, wherein the venting unit comprises: an inlet formed on the upper surface of the module frame and facing the battery cell stack; and an outlet for discharging the gas introduced through the inlet, wherein the outlet is formed in a direction perpendicular to the inlet.
[Claim 5]
The battery module of claim 4 , wherein the venting part includes a connection part formed between the inlet and the outlet to guide the gas introduced into the inlet in a direction in which the outlet is located, and an upper surface of the connecting part is formed to be inclined.
[Claim 6]
The battery module of claim 1 , wherein the venting part is vented in an upward direction based on the battery cell stack.
[Claim 7]
The method of claim 6, wherein the venting unit comprises: an inlet connected to the battery cell stack and formed in an upward direction on the upper surface of the module frame; an outlet formed in an upward direction for discharging the gas introduced through the inlet; and a connecting portion connecting the inlet and the outlet, wherein the connecting portion is formed in a direction perpendicular to the inlet and outlet directions of the inlet and the outlet.
[Claim 8]
[8] The battery module of claim 7, wherein a foreign material blocking portion for blocking foreign matter entering through the outlet is formed in the connection portion.
[Claim 9]
The battery module of claim 1, wherein a plurality of the venting portions are formed at positions corresponding to the portion where the terrace portion is located.
[Claim 10]
The battery module of claim 9 , wherein the venting portions are formed in the middle and on both sides of the upper surface of the module frame, respectively.
[Claim 11]
The battery module of claim 1 , wherein the venting part is formed such that a plurality of venting spaces having a rectangular shape are disposed on an upper surface of the module frame.
[Claim 12]
The battery module of claim 1 , wherein the venting part is formed in a hole structure obliquely penetrating through the upper surface of the module frame.
[Claim 13]
The battery module of claim 12 , wherein the venting portion is formed obliquely in the direction of the end plate positioned further from the venting portion among the two end plates formed on the front and rear surfaces of the battery cell stack.
[Claim 14]
A first module frame accommodating the first battery cell stack, a first end plate that covers the front and rear surfaces of the first battery cell stack and is coupled to the first module frame, a plurality of the first battery cell stack a first battery module including a first terrace unit assembly extending from the battery cell, and a first terminal bus bar and a first connector positioned on the first end plate; and a second battery module adjacent to the first battery module, wherein a first venting part is formed on an upper surface of the first module frame, and the part where the first venting part is formed includes a part where the first terrace part assembly is located; A second end plate formed at a corresponding position and included in the second battery module includes a second terminal bus bar and a second connector, and the first battery module and the second battery module are connected to the first terminal bus bar and The battery pack is disposed such that the second terminal bus bar faces each other, and the first connector and the second connector face each other.
[Claim 15]
15. The battery of claim 14, wherein the first terminal bus bar and the second terminal bus bar have openings formed on one side facing each other, and the first connector and the second connector have openings formed on one side facing each other, respectively. pack.
[Claim 16]
The battery pack of claim 14 , wherein the first venting part is formed to discharge gas in a direction opposite to a direction in which the second battery module is located.