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. 10-2020-0039762 dated April 1, 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 according to energy use.
[5]
Recently, as the need for a high-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 or parallel connected battery packs is increasing. .
[6]
On the other hand, when configuring a battery pack by connecting a plurality of battery cells in series or in parallel, a method of configuring a battery module including a plurality of battery cells and adding other components to at least one battery module to configure the battery pack This is common. Since the battery cells constituting the mid-to-large-sized battery module are composed of rechargeable batteries capable of charging and discharging, such a high-output, large-capacity secondary battery generates a large amount of heat during the charging and discharging process.
[7]
The battery module may include 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 cross-sectional view taken along line AA of FIG. 1 , and is a cross-sectional view showing a flame affecting an adjacent battery module when a battery module mounted in a conventional battery pack is ignited.
[9]
1 and 2, the conventional battery module is a battery cell stack in which a plurality of battery cells 10 are stacked, a frame 20 for accommodating the battery cell stack, and formed on the 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 30 , and the like.
[10]
The frame 20 and the end plate 30 may be coupled to be sealed through welding. When the internal pressure of the battery cell 10 increases during overcharging of the battery module and exceeds the fusion strength limit value of the battery cell 10 , the high-temperature heat, gas, and flame generated in the battery cell 10 is released from the battery cell 10 . can be discharged outside.
[11]
At this time, high-temperature heat, gas, and flame may be discharged through the 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, the High-temperature heat, gas, and flame may affect neighboring battery modules. 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 are exposed to 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 phenomenon 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 includes a battery cell stack in which a plurality of battery cells are stacked; and a module frame for accommodating the battery cell stack, a venting part is formed on a lower 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 case 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]
The venting part may be formed at a position corresponding to the part where the terrace part is located.
[16]
It may further include a first end plate and a second end plate respectively positioned on the front and rear surfaces of the battery cell stack.
[17]
The venting part may have a hole structure formed on a lower surface of the module frame.
[18]
The hole structure may obliquely penetrate the lower surface of the module frame.
[19]
The hole structure may have an inclination direction closer to an end plate positioned farther from the venting portion among the first end plate and the second end plate.
[20]
The venting part may include an inlet formed on a lower surface of the module frame facing the battery cell stack, an outlet for discharging gas introduced through the inlet, and a connection part connecting the inlet and the outlet.
[21]
The outlet may be formed in a direction perpendicular to the inlet.
[22]
The connection part may have a shape protruding from a lower surface of the module frame.
[23]
The venting part may be formed to discharge gas in a direction of an end plate located farther from the first end plate and the second end plate.
[24]
The first end plate and the second end plate include a module mounting part for fixing the battery module, a support member is inserted into the module mounting part, and the module from the bottom of the pack frame by the support member The lower surface of the frame may be spaced apart.
[25]
A supporting member protruding downward to the lower surface of the module frame may be formed.
[26]
The battery pack according to an embodiment of the present invention may include two or more battery modules, and openings may be formed on surfaces facing each other in the first battery module and the second battery module among the battery modules.
[27]
The venting part of the first battery module may be formed to discharge gas in a direction opposite to a direction in which the second battery module is located.
[28]
Further comprising a pack frame accommodating the battery modules, the battery modules may be spaced apart from the bottom of the pack frame.
Effects of the Invention
[29]
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 lower surface of the module frame. It is possible to minimize the damage applied to the terminal terminal and the plurality of battery cell parts of the battery module.
[30]
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
[31]
1 is a view showing a state of ignition of a battery module mounted on a conventional battery pack.
[32]
FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 , and is a cross-sectional view showing a flame affecting an adjacent battery module when a battery module mounted in a conventional battery pack is ignited.
[33]
3 is an exploded perspective view of a battery module according to an embodiment of the present invention.
[34]
4 is a perspective view of a battery cell included in the battery module of FIG. 3 .
[35]
5 is a perspective view illustrating a state in which the battery module of FIG. 3 is combined.
[36]
6 is a plan view illustrating a lower surface of the battery module of FIG. 5 .
[37]
7 is a cross-sectional view taken along the cutting line “B” of FIG. 5 .
[38]
8 and 9 are cross-sectional views of battery modules according to modified embodiments of the present invention, respectively.
[39]
10 is a perspective view illustrating a state in which a battery module according to an embodiment of the present invention is mounted on a pack frame.
[40]
11A and 11B are cross-sectional views of a battery module in which a supporting member is formed, respectively.
[41]
12 is a top plan view of a battery pack according to an embodiment of the present invention.
Modes for carrying out the invention
[42]
Hereinafter, with reference to the accompanying drawings, various embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.
[43]
In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification.
[44]
In addition, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar. In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. And in the drawings, for convenience of explanation, the thickness of some layers and regions is exaggerated.
[45]
Also, when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, it includes not only cases where it is “directly on” another part, but also cases where there is another part in between. . Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. In addition, to be "on" or "on" the reference part means to be located above or below the reference part, and it means to be located "on" or "on" the direction opposite to gravity. not.
[46]
In addition, throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.
[47]
In addition, throughout the specification, when "on a plane", it means when the target part is viewed from above, and when "in cross-section", it means when viewed from the side of a cross-section obtained by cutting the target part vertically.
[48]
Hereinafter, a battery module according to an embodiment of the present invention will be described with reference to FIGS. 3 to 7 .
[49]
3 is an exploded perspective view of a battery module according to an embodiment of the present invention. 4 is a perspective view of a battery cell included in the battery module of FIG. 3 . 5 is a perspective view illustrating a state in which the battery module of FIG. 3 is combined. 6 is a plan view illustrating a lower surface of the battery module of FIG. 5 . 7 is a cross-sectional view taken along the cutting line “B” of FIG. 5 .
[50]
3 to 7 , the battery module 100 according to an embodiment of the present invention includes a battery cell stack 120 and a battery cell stack 120 in which a plurality of battery cells 110 are stacked. It includes a module frame 200 for accommodating it, and a venting part 400 is formed on a lower surface of the module frame 200 . As used herein, the venting part means a part for discharging heat or gas inside the battery module 100 .
[51]
Referring to FIG. 4 , the battery cell 110 is preferably a pouch-type battery cell. For example, in the battery cell 110 according to the present embodiment, the two electrode leads 111 and 112 are opposite to each other and protrude from one end 114a and the other end 114b of the cell body 113, respectively. has a structure in In more detail, the electrode leads 111 and 112 are connected to the electrode assembly (not shown), and protrude from the electrode assembly (not shown) to the outside of the battery cell 110 .
[52]
Meanwhile, in the battery cell 110 , both ends 114a and 114b of the cell case 114 and one side 114c connecting them are adhered in a state where an electrode assembly (not shown) is accommodated in the cell case 114 . It can be manufactured by In other words, the battery cell 110 according to the present embodiment has a total of three sealing portions 114sa, 114sb, 114sc, and the sealing portions 114sa, 114sb, 114sc are sealed by a method such as thermal fusion. , the other one side may be formed of a connection part 115 . The cell case 114 may be formed of a laminate sheet including a resin layer and a metal layer.
[53]
In addition, the connection part 115 may extend along one edge of the battery cell 110 , and a protrusion 110p of the battery cell 110 called a bat-ear is formed at an end of the connection part 115 . can be In addition, while the cell case 114 is sealed with the protruding electrode leads 111 and 112 interposed therebetween, a terrace portion 116 may be formed between the electrode leads 111 and 112 and the cell body 113 . That is, the battery cell 110 includes a terrace portion 116 formed to extend from the cell case 114 in a direction in which the electrode leads 111 and 112 protrude.
[54]
The battery cells 110 may be configured in plurality, and the plurality of battery cells 110 may be stacked to be electrically connected to each other to form the battery cell stack 120 . The upper plate 130 may be positioned on the upper side of the battery cell stack 120 , and a bus bar frame ( 140) may be located. The battery cell stack 120 , the upper plate 130 , and the bus bar frame 140 may be accommodated together in the module frame 200 .
[55]
A thermal conductive resin may be injected between the lower surface of the battery cell stack 120 and the module frame 200 , and between 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 (not shown) may be formed. 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.
[56]
The bus bar frame 140 is positioned on the front and rear surfaces of the battery cell stack 120 , respectively, to cover the battery cell stack 120 and at the same time guide the connection between the battery cell stack 120 and external devices. can do. Specifically, the bus bar 141 and the terminal bus bar 142 may be mounted on the bus bar frame 140 . The electrode leads 111 and 112 of the battery cell 110 may be bent after passing through the slit formed in the bus bar frame 140 to be bonded to the bus bar 141 or the terminal bus bar 142 . The battery cells 110 constituting the battery cell stack 120 through the bus bar 141 may be connected in series or in parallel, and an external device through the terminal bus bar 142 exposed to the outside of the battery module 100 . The circuit and the battery cells 110 may be electrically connected. In addition, a connector (not shown) may be mounted on the bus bar frame 140 , and temperature or voltage data of the battery cell 110 measured through a sensing assembly (not shown) is transmitted to an external BMS through a connector (not shown). (Battery Management System), etc.
[57]
The end plates 301 and 302 are formed to cover the front and rear surfaces of the battery cell stack 120 . Specifically, the first end plate 301 and the second end plate 302 may be positioned on the front and rear surfaces of the battery cell stack 120 , respectively. The end plates 301 and 302 can protect the bus bar frame 140 and various electrical components connected thereto from external impact, and for this, they must have a predetermined strength and may include a metal such as aluminum.
[58]
Terminal busbar openings 320 and connector openings 330 are formed in the end plates 301 and 302 for connecting the terminal busbars 142 and connectors (not shown) mounted on the busbar frame 140 to the outside. and gas or heat generated from the battery cell 110 through the openings 320 and 330 may be discharged to the outside of the battery module 100 . The end plates 301 and 302 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) and the module frame 200 coupled structure, except for the above-described openings 320 and 330, connection with the outside may be blocked.
[59]
In the conventional battery module, as described above, high-temperature heat, gas, or flame generated in the battery cell may be discharged through the openings. However, in a battery pack structure in which a plurality of battery modules are disposed so that the end plates face each other, high-temperature heat, gas, flame, etc. ejected from the battery module may damage neighboring battery modules.
[60]
Accordingly, the venting part 400 is formed on the lower surface of the module frame 200 according to the present embodiment, so that heat, gas, flame, etc. discharged through the openings 320 and 330 can be dispersed. The venting part 400 may have a hole structure formed on the lower surface of the module frame 200 . By diversifying the exhaust path inside the battery module 100 through the venting part 400, it prevents the concentration of the exhaust to only a part of the battery module 100 when ignited, and prevents the discharge of high-temperature heat, gas and flame. can be dispersed.
[61]
In addition, the venting part 400 is formed adjacent to the portion where the terrace part 116 is located rather than the cell body 113 . A lot of heat is generated in the electrode leads 111 and 112 of the battery cell 110 and the terrace portion 116 adjacent thereto, and the sealing of the terrace portion 116 is released due to a change in pressure inside the battery module 100 . high temperature heat, gas and flame may be emitted. At this time, since the venting part 400 according to the present embodiment is formed adjacent to the portion where the terrace part 116 is located rather than the cell body 113 , the high temperature heat, gas and flame are immediately removed from the battery module 100 . can be discharged with For example, the venting part 400 may be formed at a position corresponding to the terrace part 116 .
[62]
On the other hand, since the venting unit 400 according to the embodiment of the present invention is formed on the lower surface of the module frame 200 , foreign substances floating in the air are prevented from entering the battery module 100 through the venting unit 400 . can do.
[63]
Hereinafter, together with FIGS. 8 and 9 , the venting units 500 and 600 according to modified embodiments of the present invention will be described.
[64]
8 and 9 are cross-sectional views of battery modules according to modified embodiments of the present invention, respectively.
[65]
Referring to FIGS. 8 and 9 together with FIG. 3 , the venting parts 500 and 600 according to the present embodiments are directed in the direction of the farther end plate among the first end plate 301 and the second end plate 302 . It may be configured to exhaust gas. As shown in FIGS. 8 and 9 , the venting parts 500 and 600 located close to the first end plate 301 may be formed to discharge gas in the direction of the second end plate 302 located further away.
[66]
Venting portions 500 and 600 are formed at positions corresponding to the portion where the terrace portion 116 is located, and the first end plate 301 is positioned opposite to the reference portion of the battery cell stack 120 . Since it is closer than 302, when the gas is discharged in the direction of the first end plate 301, high-temperature heat, gas and flame are emitted to other battery modules adjacent to the first end plate 301, which may cause damage. . In order to prevent this, it is preferable that the venting parts 500 and 600 are formed to discharge the gas in the direction of the second end plate 302 . This will be described again with reference to FIG. 12 below.
[67]
Referring to FIG. 8 , the venting part 500 may have a hole structure formed on the lower surface of the module frame 200 , and further may have a hole structure that obliquely penetrates the lower surface of the module frame 200 .
[68]
Specifically, the inner inlet of the obliquely penetrating venting part 500 may be formed closer to the first end plate 301 than the outer outlet, and the outer outlet may be formed closer to the second end plate 302 than the inner inlet. . In other words, the venting part 500 may have an inclination direction closer to an end plate positioned further from the venting part 500 among the first end plate 301 and the second end plate 302 .
[69]
By providing the structure as described above, it is possible to naturally impart directivity to heat or gas discharged through the venting unit 500 . That is, it is possible to induce the gas to be discharged in the direction of the second end plate 302 located further away, thereby preventing damage to other battery modules adjacent to the first end plate 301 .
[70]
In addition, the venting unit 500 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.
[71]
Next, referring to FIG. 9 , the venting unit 600 is formed on the lower surface of the module frame 200 to form an inlet 610 and an inlet 610 facing one side of the battery cell according to the stacking direction of the battery cell stack. It may include an outlet 620 for discharging the gas introduced through, and a connector 630 connecting the inlet 610 and the outlet 620 .
[72]
The outlet 620 may be formed in a direction perpendicular to the inlet 610 . In addition, the connection part 630 may be formed to protrude from the lower surface of the module frame 200, and may be formed to be inclined. Accordingly, the outlet 620 may also be formed on the outside of the lower surface of the module frame 200 .
[73]
According to the structure as described above, the venting unit 600 according to the present embodiment may more reliably guide heat or gas inside the battery module toward the second end plate 302 . That is, it has an advantage that the directionality of heat or gas can be more reliably provided. In addition, the connection part 630 may serve as a kind of cover to prevent foreign substances from entering the battery module.
[74]
10 is a perspective view illustrating a state in which the battery module according to an embodiment of the present invention is mounted on the pack frame 1100 .
[75]
Referring to FIG. 10 together with FIG. 5 , the module mounting part 310 may be formed on the end plates 301 and 302 so that the battery module 100 can be mounted and fixed to the pack frame 1100 of the battery pack. . There is no limit to the number of module mounting parts 310, but two on both sides of the first end plate 301 and two on both sides of the second end plate 302 for stable mounting of the battery module 100; It is preferable that a total of four are formed.
[76]
The support member 340 may be inserted into the module mounting part 310 . Specifically, a mounting hole 311 may be formed in the module mounting part 310 , and the support member 340 may be inserted into the mounting hole 311 . A through hole may be formed in the bottom 1110 of the pack frame 1100 , and one end of the support member 340 passing through the mounting hole 311 may be coupled to the through hole of the bottom 1110 . For example, one end of the support member 340 may be provided in a bolt shape and coupled with a nut-shaped through hole of the bottom portion 1110 . However, the coupling is not limited to the bolt and nut coupling, and may be implemented through various embodiments.
[77]
Meanwhile, the support member 340 may have a cylindrical rod shape so as to be inserted into the mounting hole 311 of the module mounting part 310 . In addition, a head portion 341 may be formed at the other end opposite to the one end of the support member 340 . The head part 341 may be formed to have a wider radius than the mounting hole 311 , and the end plates 301 and 302 may be closely adhered to and fixed to the bottom part 1110 without being inserted into the mounting hole 311 . Through this, the battery module 100 may be mounted and fixed to the pack frame 1100 .
[78]
At this time, it is preferable to set the height of the support member 340 to be somewhat longer so that the lower surface of the module frame 200 is spaced apart from the bottom 1110 of the pack frame 1100 by a predetermined distance d1. In addition, as an example, although not specifically shown, a fixing member such as a nut surrounding the support member 340 is provided at the lower end of the mounting part 310 , and the battery module 100 including the end plates 301 and 302 is located below. can be prevented from moving to That is, the fixing member that maintains the separation distance by a predetermined interval d1 may be provided.
[79]
In the present invention, since the venting parts 400 , 500 , 600 are formed on the lower surface of the module frame 200 and heat or gas is discharged through the lower surface, the lower surface is the bottom 1110 of the pack frame 1100 ) It is preferable to provide a space in which heat or gas is discharged by separating it from the .
[80]
In particular, since the venting parts 500 and 600 of FIGS. 8 and 9 induce the discharge in the direction from the first end plate 301 to the second end plate 302 , the lower surface of the module frame 200 is spaced apart as described above. It is preferable to be In addition, since the venting part 600 of FIG. 9 forms a structure in which the connection part 630 and the outlet 620 protrude, it may be more preferable that the lower surface of the module frame 200 be spaced apart.
[81]
11A and 11B are cross-sectional views of a battery module in which a supporting member 210 is formed, respectively, as a modified embodiment of the present invention.
[82]
Referring to FIGS. 11A and 11B , a supporting member 210 protruding downwardly on the lower surface of the module frame 200 may be formed.
[83]
When the battery module is mounted on the pack frame through the support member 210 , the lower surface of the module frame 200 may be spaced apart from the bottom of the pack frame. Accordingly, a space for discharging heat or gas may be provided, and the discharged heat or gas may easily move from the first end plate 301 to the second end plate 302 .
[84]
There is no particular limitation on the number of support members 210 , but a plurality is preferable to stably support the battery module, and it is more preferable to be evenly disposed on all areas of the lower surface of the module frame 200 .
[85]
For convenience of explanation, in FIGS. 11A and 11B , the venting parts 500 and 600 and the support member 210 are shown together, but in consideration of the path of heat or gas, the support member 210 is a venting part 500, 600) and is preferably formed out of alignment. Specifically, the position of the venting parts 500 and 600 and the position of the support member 210 in a direction parallel to the surface of the cell body 113 (a direction parallel to the x-axis in FIG. 5 ) do not coincide with each other. desirable. This is to prevent the support member 210 from blocking the heat or gas discharged from the venting units 500 and 600 .
[86]
There is no particular limitation on the material or forming method of the support member 210 , and it is preferable to have a predetermined strength to support the battery module. The support member 210 may have a configuration integrated with the module frame 200 , or alternatively, may have a configuration formed by bonding a member such as a metal to the lower surface of the module frame 200 .
[87]
On the other hand, there is no particular limitation on the number of the venting units 400 , 500 , and 600 according to the embodiment of the present invention described above, and may be one or may be configured in plurality. However, when the venting parts 400 , 500 , and 600 are formed in plurality, the battery cell 110 may correspond to the position of the terrace part 116 of the battery cell 110 constituting the battery cell stack 120 . They are preferably arranged along a direction parallel to the stacking direction. Here, the direction in which the battery cells 110 are stacked means a direction perpendicular to the surface of the cell body 113 , that is, a direction parallel to the y-axis in FIG. 5 .
[88]
Referring back to FIG. 3 , the module frame 200 according to the present invention may have a mono frame structure or a structure in which an upper cover is coupled to a U-shaped frame.
[89]
First, the mono frame may be in the form of a metal plate in which the upper surface, the lower surface and both sides are integrated, and may be manufactured by extrusion molding.
[90]
Next, in the case of the structure in which the upper cover is coupled to the U-shaped frame, the lower surface and both sides may be formed by coupling the upper cover to the upper side of the U-shaped frame, which is an integrated metal plate, and may be manufactured by press molding.
[91]
7 or 8, the venting parts 400 and 500 of the hole structure may be applied to both a mono frame manufactured by extrusion molding or a U-shaped frame manufactured by press molding.
[92]
On the other hand, as shown in FIG. 9 , the venting part 600 having a protruding structure is easier to implement in a U-shaped frame manufactured by press molding rather than a mono frame manufactured by extrusion molding. However, in forming the venting part 600 of the protruding structure, a through hole may be formed in the lower surface of the module frame 200 and the connection part 630 and the outlet 620 may be joined to the lower surface. In this case, the venting unit 600 is also applicable to a mono frame manufactured by extrusion molding.
[93]
12 is a top plan view of the battery pack 1000 according to an embodiment of the present invention.
[94]
Referring to FIG. 12 , the battery pack 1000 according to an embodiment of the present invention may include two or more of the battery modules 100a and 100b described above.
[95]
The battery modules 100a and 100b may be accommodated in the pack frame 1100, and may be mounted together with various control and protection systems such as a battery management system (BMS) and a cooling system.
[96]
The first battery module 100a and the second battery module 100b may have openings 320a, 330a, 320b, and 330b formed on surfaces facing each other.
[97]
Specifically, the first end plate 301a of the first battery module 100a and the first end plate 301b of the second battery module 100b may face each other. In this case, the terminal bus bar opening 320a and the connector opening 330a may be formed in the first end plate 301a of the first battery module 100a. Also, a terminal bus bar opening 320b and a connector opening 330b may be formed in the first end plate 301b of the second battery module 100b.
[98]
The battery modules 100a and 100b according to the present embodiment may reduce heat, gas, flame, etc. discharged through the openings 320a, 330a, 320b, and 330b by providing the aforementioned venting portion on the lower surface thereof.
[99]
In addition, the venting parts 500 and 600 shown in FIG. 8 or FIG. 9 may be provided in the battery modules 100a and 100b. Accordingly, the first battery module 100a may induce heat, gas, flame, etc. to be discharged in a direction opposite to the direction in which the second battery module 100b is located, and the second battery module 100b is the first battery Heat, gas, flame, etc. may be induced to be discharged in a direction opposite to the direction in which the module 100a is located. That is, damage that may be applied between the facing battery modules 100a and 100b can be minimized.
[100]
Also, the battery modules 100a and 100b according to the present embodiment may be spaced apart from the bottom 1110 of the pack frame 1100 . Specifically, the battery modules 100a and 100b may include the module mounting part 310 and the support member 340 shown in FIG. 10 or the support member 210 shown in FIGS. 11A and 11B . Accordingly, a space for discharging heat, gas, flame, etc. may be provided inside the battery pack 1000 .
[101]
In this embodiment, terms indicating directions such as front, back, left, right, up, and down are used, but these terms are only for convenience of explanation, and may vary depending on the location of the object or the position of the observer. .
[102]
The battery module or battery pack according to the present embodiment described above may be applied to various devices. Specifically, it may be applied to transportation means such as electric bicycles, electric vehicles, hybrids, etc., but is not limited thereto and may be applied to various devices that can use secondary batteries.
[103]
Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the
[104]
Explanation of symbols
[105]
100, 100a, 100b: battery module
[106]
110: battery cell
[107]
111, 112: electrode leads
[108]
113: cell body
[109]
116: terrace part
[110]
120: battery cell stack
[111]
200: module frame
[112]
301: first end plate
[113]
302: second end plate
[114]
310: module mounting unit
[115]
400, 500, 600: venting part
[116]
1000: battery pack
[117]
1100: Pack Frame
[118]
Claims
[Claim 1]
a battery cell stack in which a plurality of battery cells are stacked; and a module frame for accommodating the battery cell stack, a venting part is formed on a lower 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 case 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 vent part is formed at a position corresponding to the part where the terrace part is located.
[Claim 3]
The battery module of claim 1, further comprising a first end plate and a second end plate positioned on the front and rear surfaces of the battery cell stack, respectively.
[Claim 4]
The battery module of claim 3 , wherein the venting part has a hole structure formed on a lower surface of the module frame.
[Claim 5]
The battery module of claim 4, wherein the hole structure obliquely penetrates the lower surface of the module frame.
[Claim 6]
The battery module of claim 5 , wherein the hole structure has an inclined direction closer to an end plate positioned farther from the venting part among the first end plate and the second end plate.
[Claim 7]
The method of claim 3, wherein the venting part is formed on the lower surface of the module frame and includes an inlet facing the battery cell stack, an outlet for discharging gas introduced through the inlet, and a connection part connecting the inlet and the outlet. battery module.
[Claim 8]
The battery module of claim 7 , wherein the outlet is formed in a direction perpendicular to the inlet.
[Claim 9]
The battery module of claim 7 , wherein the connection part protrudes from a lower surface of the module frame.
[Claim 10]
The battery module of claim 3 , wherein the venting part is formed to discharge gas in a direction of an end plate located further from the first end plate and the second end plate.
[Claim 11]
The method of claim 3, wherein the first end plate and the second end plate, including a module mounting portion for fixing the battery module, the support member is inserted into the module mounting portion, the pack frame by the support member A battery module in which the lower surface of the module frame is spaced apart from the bottom.
[Claim 12]
The battery module of claim 1, wherein a supporting member protruding downward to a lower surface of the module frame is formed.
[Claim 13]
A battery pack comprising two or more battery modules according to claim 1, wherein a first battery module and a second battery module among the battery modules have openings formed on surfaces facing each other.
[Claim 14]
The battery pack of claim 13 , wherein the venting part of the first battery module discharges gas in a direction opposite to a direction in which the second battery module is located.
[Claim 15]
The battery pack of claim 13 , further comprising a pack frame accommodating the battery modules, wherein the battery modules are spaced apart from the bottom of the pack frame.