WO2022114769A1 - 전지 모듈 및 이를 포함하는 전지 팩 - Google Patents
전지 모듈 및 이를 포함하는 전지 팩 Download PDFInfo
- Publication number
- WO2022114769A1 WO2022114769A1 PCT/KR2021/017379 KR2021017379W WO2022114769A1 WO 2022114769 A1 WO2022114769 A1 WO 2022114769A1 KR 2021017379 W KR2021017379 W KR 2021017379W WO 2022114769 A1 WO2022114769 A1 WO 2022114769A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bus bar
- module
- battery
- frame
- cell stack
- Prior art date
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- 238000013022 venting Methods 0.000 claims abstract description 56
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007599 discharging Methods 0.000 claims description 9
- 210000004027 cell Anatomy 0.000 description 78
- 239000007789 gas Substances 0.000 description 24
- 239000000126 substance Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 2
- 239000012777 electrically insulating material Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010071232 Protuberant ear Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- 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.
- Secondary batteries are attracting a lot of attention as an energy source for power devices such as electric bicycles, electric vehicles, and hybrid electric vehicles, as well as mobile devices such as cell phones, digital cameras, and notebook computers.
- 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 mid-to-large-sized battery module are composed of rechargeable batteries capable of charging and discharging, such a high-output, high-capacity secondary battery generates a large amount of heat during charging and discharging.
- 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.
- FIG. 1 is a view showing a state of ignition of a battery module mounted on a conventional battery pack.
- FIG. 2 is a view showing a flame affecting an adjacent battery module when a battery module mounted on a conventional battery pack is ignited along a portion A-A of FIG. 1 .
- 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, and the like.
- the frame 20 and the end plate 30 may be coupled to be sealed through welding.
- the internal pressure of the battery cell 10 increases when the battery module is overcharged to exceed the fusion strength limit of the battery cell 10 .
- high-temperature heat, gas, and flame generated in the battery cell 10 may be discharged to the outside of the battery cell 10 .
- high-temperature heat, gas, and flame may be discharged through openings formed in the end plate 30 .
- high-temperature heat, gas, and flame may affect the battery module adjacent to the battery module ejecting the flame.
- 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 .
- 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.
- a battery module is a battery cell stack in which a plurality of battery cells are stacked, a module frame accommodating the battery cell stack, is accommodated in the module frame, and covers the front surface of the battery cell stack. a first bus bar frame, and a second bus bar frame accommodated in the module frame and covering a rear surface of the battery cell stack, wherein a terminal bus bar is mounted on the first bus bar frame, and the second A module connector is mounted on the bus bar frame, and a venting part penetrating an upper plate is formed on the module frame, and the venting part is located closer to the module connector than the terminal bus bar.
- the venting part has a hole structure formed in the upper plate, and the hole structure may pass through the upper plate obliquely in a direction close to the second bus bar frame.
- the terminal bus bar may be connected to an external bus bar providing a connection with another battery module adjacent to the battery module including the terminal bus bar.
- the venting part may be formed to vent the gas in a direction in which the second bus bar frame is located.
- the venting part is formed on the upper surface of the module frame and includes an inlet facing the battery cell stack, and an outlet for discharging gas introduced through the inlet, wherein the outlet is formed in a direction perpendicular to the inlet.
- 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 inclined.
- the venting part may be formed to be vented in an upward direction based on the battery cell stack.
- the venting part is connected to the battery cell stack, an inlet 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 the inlet and the outlet are connected and a connecting portion, wherein the connecting portion may be formed in a direction perpendicular to the inlet and outlet directions of the inlet and the outlet.
- a discharge passage may be formed between the upper portion of the module frame and the battery cell stack.
- a battery pack according to another embodiment of the present invention includes the battery module described above.
- the battery in order to control high-temperature heat, gas, and flame when a thermal runaway phenomenon occurs in the battery module, the battery is adjacent to the module connector disposed on the other side of the battery module than the terminal bus bar disposed on one side of the battery module By forming the venting portion at the upper end of the module, it is possible to delay the propagation of the flame to the adjacent battery module.
- FIG. 1 is a view showing a state of ignition of a battery module mounted on a conventional battery pack.
- FIG. 2 is a portion taken along line A-A of FIG. 1 , and is a view showing a flame affecting an adjacent battery module when a battery module mounted on a conventional battery pack ignites.
- FIG. 3 is a perspective view illustrating a battery module according to an embodiment of the present invention.
- FIG. 4 is an exploded perspective view of the battery module of FIG. 3 .
- FIG. 5 is a perspective view of a battery cell included in the battery module of FIG. 4 .
- FIG. 6 is a perspective view showing the second end plate of the battery module of FIG. 3 at different angles to be seen from the front.
- FIG. 7 is a cross-sectional view taken along the cutting line B-B of FIG. 3 .
- FIG. 8 is a perspective view illustrating a battery module according to another embodiment of the present invention.
- FIG. 9 is a perspective view showing a battery module according to another embodiment of the present invention.
- a part of a layer, film, region, plate, etc. 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 another part is 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.
- the reference part means to be located above or below the reference part, and to necessarily mean to be located “on” or “on” in the direction opposite to the gravity not.
- planar it means when the target part is viewed from above, and "cross-sectional” means when viewed from the side when a cross-section of the target part is vertically cut.
- FIG. 3 is a perspective view illustrating a battery module according to an embodiment of the present invention.
- 4 is an exploded perspective view of the battery module of FIG. 3 .
- 5 is a perspective view of a battery cell included in the battery module of FIG. 4 .
- a plurality of battery cells 110 including electrode leads 111 and 112 protruding in opposite directions are stacked.
- One surface of the battery cell stack 120 in one direction (x-axis direction) from which the battery cell stack 120 , the module frame 200 accommodating the battery cell stack 120 , and the electrode lead 111 protrude A second bus bar frame 320 disposed on the other surface of the battery cell stack 120 in a different direction (-x-axis direction) from which the first bus bar frame 310 and the electrode lead 112 protrude from the include
- the battery cell 110 is preferably a pouch-type battery cell.
- 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 .
- both ends 114a and 114b of the cell case 114 and one side 114c connecting them are adhered in a state in which an electrode assembly (not shown) is accommodated in the cell case 114 .
- 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.
- connection part 115 may extend long 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 .
- a terrace portion 116 is formed between the electrode leads 111 and 112 and the cell body 113 .
- 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.
- 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 battery cells 110 may be stacked along the y-axis direction to form the battery cell stack 120 .
- a first bus bar frame 310 may be positioned on one surface of the battery cell stack 120 in the direction in which the electrode leads 111 protrude (the x-axis direction).
- a second bus bar frame 320 may be positioned on the other surface of the battery cell stack 120 in the direction in which the electrode leads 112 protrude (the -x-axis direction).
- the battery cell stack 120 , the first bus bar frame 310 , or the second bus bar frame 320 may be accommodated in the module frame 200 .
- the module frame 200 may protect the battery cell stack 120 accommodated in the module frame 200 and the electrical equipment connected thereto from external physical impact.
- the module frame 200 may have a mono frame structure.
- 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.
- the structure of the module frame 200 is not limited thereto, and may be a structure in which a U-shaped frame and an upper plate are combined.
- the lower surface and both sides may be formed by combining the upper plate on the upper side of the U-shaped frame, which is a combined or integrated metal plate, and may be manufactured by press molding.
- 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.
- the module frame 200 may be opened, and first, respectively, on both open sides of the module frame 200 .
- An end plate 410 and a second end plate 420 may be positioned.
- the first end plate 410 may be joined to the module frame 200 while covering the first bus bar frame 310
- the second end plate 420 may cover the second bus bar frame 320 while covering the module. It may be bonded to the frame 200 . That is, the first bus bar frame 310 may be positioned between the first end plate 410 and the battery cell stack 120 , and between the second end plate 420 and the battery cell stack 120 .
- a second bus bar frame 320 may be positioned.
- an insulating cover 800 (refer to FIG. 3 ) for electrical insulation may be positioned between the first end plate 410 and the first bus bar frame 310 .
- the first end plate 410 and the second end plate 420 are positioned to cover the one surface and the other surface of the battery cell stack 120 , respectively.
- the first end plate 410 and the second end plate 420 can protect the first bus bar frame 310, the second bus bar frame 320, and various electrical components connected thereto from external impact. It must have a certain strength and may include a metal such as aluminum.
- the first end plate 410 and the second end plate 420 may be joined to a corresponding edge of the module frame 200 by welding or the like, respectively.
- the first bus bar frame 310 is positioned on one surface of the battery cell stack 120 to cover the battery cell stack 120 and guide the connection between the battery cell stack 120 and external devices at the same time.
- at least one of a bus bar, a terminal bus bar, and a module connector may be mounted on the first bus bar frame 310 .
- at least one of a bus bar, a terminal bus bar, and a module connector may be mounted on a surface opposite to the surface of the first bus bar frame 310 facing the battery cell stack 120 .
- FIG. 4 shows a state in which the bus bar 510 and the terminal bus bar 520 are mounted on the first bus bar frame 310 .
- the battery cells 110 constituting the battery cell stack 120 may be connected in series or parallel by the bus bar 510 or the terminal bus bar 520, and the terminal bus bar exposed to the outside of the battery module 100a.
- the battery cells 110 may be electrically connected to an external device or circuit through 520 .
- the terminal bus bar 520 may be connected to an external bus bar providing a connection with another battery module adjacent to a battery module including the terminal bus bar 520 .
- the first bus bar frame 310 may include an electrically insulating material.
- the bus bar 510 or the terminal bus bar 520 is a battery. By limiting contact with the cells 110, it is possible to prevent a short circuit.
- the second bus bar frame 320 may be positioned on the other surface of the battery cell stack 120 .
- a bus bar and a module connector may be mounted on the second bus bar frame 320 .
- the electrode lead 112 may be bonded to the bus bar mounted on the second bus bar frame 320 .
- the second bus bar frame 320 may include an electrically insulating material to prevent a short circuit.
- An opening through which the terminal bus bar 520 is exposed may be formed in the first end plate 410 according to the present embodiment.
- the opening may be a terminal bus bar opening.
- a terminal bus bar opening 410H through which the terminal bus bar 520 is exposed may be formed in the first end plate 410 .
- the terminal bus bar 520 further includes an upwardly protruding portion, the upwardly protruding portion being exposed to the outside of the battery module 100a through the terminal busbar opening 410H.
- the terminal bus bar 520 exposed through the terminal bus bar opening 410H may be connected to another battery module or a battery disconnect unit (BDU) to form a high voltage (HV) connection.
- BDU battery disconnect unit
- FIG. 6 is a perspective view showing the second end plate of the battery module of FIG. 3 at different angles to be seen from the front.
- 7 is a cross-sectional view taken along the cutting line B-B of FIG. 3 .
- an opening through which at least one of the module connectors is exposed may be formed in the second end plate 420 according to the present embodiment.
- the opening may be a module connector opening.
- a module connector opening 420H through which the module connector 600 is exposed may be formed in the second end plate 420 . This means that the module connector 600 is mounted on the aforementioned second bus bar frame 320 .
- the module connector 600 may be connected to a temperature sensor or a voltage measuring member provided inside the battery module 100a.
- This module connector 600 is connected to an external BMS (Battery Management System) to form an LV (Low voltage) connection. responsible for the function
- the venting part 900 is formed on the upper plate of the module frame 200 , and the venting part 900 is closer to the module connector 600 than to the terminal bus bar 520 .
- the venting part 900 is a hole structure formed in the upper plate of the module frame 200 , and the hole structure passes through the upper plate of the module frame 200 obliquely in a direction close to the second bus bar frame 320 .
- the venting part 900 may be formed to vent gas in a direction in which the second bus bar frame 320 or the second end plate 420 is positioned.
- a member hereinafter referred to as an HV member
- a discharge passage 450 may be formed between the upper portion of the module frame 200 and the battery cell stack 120 .
- Gas or heat generated between the first end plate 410 and the battery cell stack 120 is disposed on the second bus bar frame 320 opposite to the first end plate 410 through the discharge passage 450 or It may move toward the second end plate 420 .
- Gas or heat moved toward the second bus bar frame 320 or the second end plate 420 may be discharged from the battery module 100a through the venting part 900 .
- the HV member is more prone to overheating than the LV member and is susceptible to self-ignition or internal ignition, the gas or heat generated around the first end plate 410 through the discharge passage 450 is transferred to the second end plate ( 420), the internal heat propagation phenomenon may be alleviated.
- high-temperature heat, gas, flame, etc. ejected through an opening of the battery module may affect neighboring battery modules.
- adjacent battery modules facing each other for HV connection may cause damage to other electrical components including the terminal bus bar 40 or the battery cell 10 .
- the venting part 900 is formed on the upper plate of the module frame 200 , and the venting part 900 is the module connector 600 rather than the terminal bus bar 520 . ) by being formed adjacent to, limiting the high temperature heat, gas, flame, etc. resulting from the battery cell 110 from being discharged through the opening of the first end plate 410, for example, the terminal bus bar opening 410H. can do.
- the flame is transferred to the terminal bus bar 520
- the external bus bars connecting the neighboring battery modules may be melted and further ignited due to an internal short circuit, which is highly likely to be transferred to the neighboring battery modules.
- damage to neighboring battery modules and HV connection structures can be greatly reduced.
- FIG. 8 is a perspective view illustrating a battery module according to another embodiment of the present invention.
- the venting part 910 may be formed to be vented upward relative to the battery cell stack 120 .
- the venting unit 910 is connected to the battery cell stack 120 , is formed in an inlet 911 formed in an upward direction on the upper surface of the module frame 200 , and is formed in an upward direction to discharge gas introduced through the inlet 911 . It includes an outlet 912 for discharging and a connector 913 connecting the inlet 911 and the outlet 912, and the connector 913 is a direction perpendicular to the inlet and outlet directions of the inlet 911 and the outlet 912. can be formed with
- the venting unit 910 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.
- the outlet 912 is formed toward the upper direction, foreign substances in the air can enter the outlet 912 by gravity. A phenomenon in which foreign substances introduced into the battery module are introduced into the battery module through the inlet 911 can be minimized.
- a foreign material blocking part (not shown) is formed on the connection part 913 to block foreign substances entering through the outlet 912, so that foreign substances do not enter the inlet 911 part from the outlet 912 part through the connection part 913. can be prevented
- FIG. 9 is a perspective view showing a battery module according to another embodiment of the present invention.
- the venting part 920 is formed on the upper surface of the module frame 200 and is connected to the battery cell stack, and the gas introduced through the inlet 921 and the inlet 921 . It includes an outlet 922 for discharging, and the outlet 922 may be formed in a direction perpendicular to the inlet 921 .
- the venting part 920 includes a connection part 923 formed between the inlet 921 and the outlet 922 and guiding the gas introduced into the inlet 921 in the direction in which the outlet 922 is located, and the connection part ( 923) may be formed to be inclined.
- the outlet 922 is formed in a direction perpendicular to the inlet 921 and the upper surface of the module frame 200 to prevent foreign substances floating in the air from entering the outlet 922 by gravity.
- the upper surface of the connection part 923 is formed to be inclined toward the outlet 922, so that the high-temperature heat, gas, and flame introduced into the inlet 921 are redirected through the connection part 923 and naturally through the outlet 922. can be emitted.
- Table 1 compares the time required for voltage drop according to the presence and location of the venting unit 900 when the battery module internally ignites.
- CASE 1 is a case in which the venting part 900 is formed adjacent to the LV member as in the embodiment of the present invention
- CASE 2 is a case in which the venting part 900 is formed entirely on the upper plate of the module frame 200 .
- the initial venting and flame generation time was 156 sec, and venting and flame were found somewhat later than CASE 1 and CASE 2 .
- the voltage drop proceeded at a fast rate, and the total voltage drop required time was 119 sec. This may be because the reference battery module has a closed structure in which the venting part 900 is not formed, and thus, oxygen supply is blocked during internal ignition, thereby delaying initial venting and flame generation times.
- the voltage drop may be rapid.
- venting part 900 of CASE 2 is located adjacent to the LV member and induces a flow of gas or the like in the direction in which the LV member is located, thereby relieving the temperature around the HV member, which may be in a relatively high temperature state.
- a battery pack according to another embodiment of the present invention may include the aforementioned battery module, an adjacent battery module adjacent to the battery module, and a pack case accommodating the battery module and the adjacent battery module.
- the first terminal bus bar and the second terminal bus bar included in each of the battery module and the adjacent battery module may be disposed in a direction facing each other.
- the first venting part formed in the battery module and the second venting part formed in the adjacent battery module may each have a hole structure in which they are vented away from each other.
- 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 an electric bicycle, an electric vehicle, a hybrid, etc., but is not limited thereto, and may be applied to various devices that can use a secondary battery.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
Category | REFERENCE | CASE 1 | CASE 2 | |||
Type | 밀폐 구조 (No venting part) |
LV 부재 주변 집중 벤팅 구조 |
전체 벤팅 구조 | |||
Top-plate hole | - | 6ea | 10ea | |||
First Venting & Flame | 156 sec | 88 sec | 74 sec | |||
dT/dt ≥ 1℃ / sec | n/a | 86 sec | 82 sec | |||
Measure temp. > 60℃ | n/a | 95 sec | 83 sec | |||
Voltage drop start | 186 sec | +0 | 125 sec | +37 | 102 sec | +7 |
Bank02 Voltage drop start | 186 sec | +13 | 162 sec | +38 | 109 sec | +1 |
Bank03 Voltage drop start | 199 sec | +19 | 200 sec | +21 | 110 sec | +2 |
Bank04 Voltage drop start | 218 sec | +41 | 221 sec | +49 | 112 sec | +11 |
Bank05 Voltage drop start | 259 sec | +24 | 270 sec | +55 | 123 sec | +45 |
Bank06 Voltage drop start | 283 sec | +22 | 325 sec | +35 | 168 sec | +45 |
0 Voltage | 305 sec | 360 sec | 213 sec | |||
Voltage drop time from start to 0 Voltage | 119 sec | 235 sec | 111 sec |
Claims (10)
- 복수의 전지셀이 적층된 전지셀 적층체,상기 전지셀 적층체를 수용하는 모듈 프레임,상기 모듈 프레임에 수용되고, 상기 전지셀 적층체의 전면을 커버하는 제1 버스바 프레임, 및상기 모듈 프레임에 수용되고, 상기 전지셀 적층체의 후면을 커버하는 제2 버스바 프레임을 포함하고,상기 제1 버스바 프레임에는 터미널 버스바가 장착되고, 상기 제2 버스바 프레임에는 모듈 커넥터가 장착되며,상기 모듈 프레임에는 상부 플레이트를 관통하는 벤팅부가 형성되고, 상기 벤팅부는 상기 터미널 버스바 보다 상기 모듈 커넥터와 더 가까이 위치하는 전지 모듈.
- 제1항에서,상기 벤팅부는 상기 상부 플레이트에 형성되는 홀 구조이며, 상기 홀 구조는 상기 제2 버스바 프레임에 가까운 방향으로 비스듬하게 상기 상부 플레이트를 관통하는 전지 모듈.
- 제1항에서,상기 터미널 버스바는, 상기 터미널 버스바가 포함된 전지 모듈에 이웃하는 다른 전지 모듈과의 연결을 제공하는 외부 버스바와 연결되는 전지 모듈.
- 제1항에서,상기 벤팅부는, 상기 제2 버스바 프레임이 위치한 방향으로 가스를 벤팅하도록 형성되는 전지 모듈.
- 제1항에서,상기 벤팅부는,상기 모듈 프레임의 상면 상에 형성되어 상기 전지셀 적층체와 마주보는 유입구,상기 유입구를 통해 유입된 가스를 배출하는 배출구를 포함하고,상기 배출구는 상기 유입구와 수직인 방향으로 형성되는 전지 모듈.
- 제5항에서,상기 벤팅부는,상기 유입구와 상기 배출구 사이에 형성되어 상기 유입구로 유입된 가스를 상기 배출구가 위치한 방향으로 안내하는 연결부를 포함하고,상기 연결부의 상면은 경사지게 형성된 전지 모듈.
- 제1항에서,상기 벤팅부는, 상기 전지셀 적층체 기준 상측 방향으로 벤팅되도록 형성되는 전지 모듈.
- 제7항에서,상기 벤팅부는,상기 전지셀 적층체와 연결되고, 상기 모듈 프레임의 상면 상에서 상측 방향으로 형성된 유입구,상측 방향으로 형성되어 상기 유입구를 통해 유입된 가스를 배출하는 배출구, 및상기 유입구와 상기 배출구를 연결하는 연결부를 포함하고,상기 연결부는 상기 유입구 및 상기 배출구의 유입 및 배출 방향과 수직인 방향으로 형성되는 전지 모듈.
- 제1항에서,상기 모듈 프레임의 상부와 상기 전지셀 적층체 사이에 배출 통로가 형성되는 전지 모듈.
- 제1항에 따른 전지 모듈을 포함하는 전지팩.
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US17/910,143 US20230097757A1 (en) | 2020-11-26 | 2021-11-24 | Battery module and battery pack including the same |
EP21898595.0A EP4102634A4 (en) | 2020-11-26 | 2021-11-24 | BATTERY MODULE AND BATTERY PACK INCLUDING SAME |
JP2022548488A JP7502454B2 (ja) | 2020-11-26 | 2021-11-24 | 電池モジュールおよびこれを含む電池パック |
CN202180018561.2A CN115210948A (zh) | 2020-11-26 | 2021-11-24 | 电池模块和包括该电池模块的电池组 |
JP2024091341A JP2024118478A (ja) | 2020-11-26 | 2024-06-05 | 電池モジュールおよびこれを含む電池パック |
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KR1020210161637A KR20220073664A (ko) | 2020-11-26 | 2021-11-22 | 전지 모듈 및 이를 포함하는 전지 팩 |
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CN115210948A (zh) | 2022-10-18 |
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