WO2023003260A1 - 배터리팩 - Google Patents
배터리팩 Download PDFInfo
- Publication number
- WO2023003260A1 WO2023003260A1 PCT/KR2022/010192 KR2022010192W WO2023003260A1 WO 2023003260 A1 WO2023003260 A1 WO 2023003260A1 KR 2022010192 W KR2022010192 W KR 2022010192W WO 2023003260 A1 WO2023003260 A1 WO 2023003260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- disposed
- groove
- battery cell
- battery cells
- Prior art date
Links
- 238000005192 partition Methods 0.000 claims abstract description 35
- 230000004888 barrier function Effects 0.000 claims description 32
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000000644 propagated effect Effects 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000652 nickel hydride Inorganic materials 0.000 description 2
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000009993 protective function Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001803 electron scattering Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Images
Classifications
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- 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
- H01M50/383—Flame arresting or ignition-preventing means
-
- 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
-
- 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
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
-
- 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
- H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
-
- 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
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
-
- 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 pack, and more particularly, even if a spark or flame is generated in a specific battery cell, it effectively blocks the propagation of the spark or flame to other battery cells, thereby preventing the risk of burnout of the entire battery pack. It is about a battery pack with improved product stability.
- Secondary batteries which are easy to apply according to product groups and have electrical characteristics such as high energy density, are used not only in portable devices but also in electric vehicles (EVs) or hybrid electric vehicles (HEVs) driven by an electrical driving source. It is universally applied.
- EVs electric vehicles
- HEVs hybrid electric vehicles
- Types of secondary batteries that are currently widely used include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydride batteries, and nickel zinc batteries.
- a battery pack may be configured by connecting a plurality of battery cells in series.
- a battery pack may be configured by connecting a plurality of battery cells in parallel according to a charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack may be variously set according to a required output voltage or charge/discharge capacity.
- Fires such as electric vehicles and ESSs may occur when battery cells are overcharged due to problems in software settings, or due to problems in the battery cells themselves.
- a plurality of battery cells are installed in a battery module constituting a battery pack.
- sparks or flames are generated due to a problem in one battery cell, such sparks or flames are instantly propagated to other battery cells and spread throughout the battery pack. is burned away As a result, the entire operation equipment equipped with the battery pack is burned down, resulting in huge cost loss and possibly causing a human accident.
- 1 discloses a partial cross-sectional structure of a conventional battery module equipped with a plurality of battery cells.
- one form of a conventional cylindrical battery cell 40 includes a current blocking device 41, a gasket 42, a heat resistant member 43, a shield 44, an upper cap 45, and a vent plate 46. ).
- the current interruption device 41 may be a CID (Current Interrupt Device), which may be a device that automatically disconnects a contact when an overcurrent flows.
- the gasket 42 may be disposed along the circumference of the current cut-off element 41, and leakage of the internal material of the battery cell may be prevented.
- the heat-resistant member 43 may perform a function of protecting the battery cell 40 from external heat, and the shield 44 forms the exterior of the battery cell 40 and protects the battery cell 40 from external shock. It can perform a protective function.
- the upper cap 45 may be disposed on top of the battery cell 40 to form an anode, and may also serve to protect materials inside the battery cell 40 .
- a vent plate 46 may be disposed between the upper cap 45 and the current blocking element 41 .
- a plurality of these battery cells 40 may be disposed inside the battery module, and the upper portion is covered by the module cover 20 .
- each battery cell 40 is inserted and arranged by the cell holder 30 .
- the present invention has been made to solve the problems of the related art as described above, and an object of the present invention is to effectively block the propagation of such sparks or flames to other battery cells even when sparks or flames are generated in a specific battery cell. By doing so, it is to provide a battery pack with increased product stability by preventing the risk of burnout of the entire battery pack.
- the present invention for achieving the above objects relates to a battery pack, comprising: a plurality of battery cells; a module frame accommodating the plurality of battery cells; and a barrier rib disposed on at least a portion of an upper portion or a lower portion of the module frame and shielding at least a portion of the battery cells, wherein the barrier rib is formed in another battery even if a flame occurs in some of the plurality of battery cells. Diffusion into cells can be prevented.
- the plurality of battery cells are arranged in a plurality of columns inside the module frame, and the barrier rib is in each column formed by the plurality of battery cells in at least a part of the upper part or the lower part of the module frame. It may be arranged in a plurality of columns at corresponding positions.
- the barrier rib may include a center wall disposed between adjacent battery cells among the plurality of battery cells; a first shielding wall connected to one side of the center wall and disposed in a column direction P formed by the plurality of battery cells; a second shielding wall connected to the other side of the center wall and disposed in a column direction P formed by the plurality of battery cells; and a penetrating portion that opens at least a portion of the battery cell and is disposed to be surrounded by the center wall and the first and second shielding walls.
- a first shielding wall including a partition wall forming another row adjacent to a first shielding wall or a second shielding wall including a partition wall forming any one of the plurality of rows of partitions arranged in columns includes a first shielding wall including a partition wall
- the second shielding walls may be disposed at different positions based on the column direction P.
- the barrier rib may include a first groove formed in the first shielding wall; and a second groove formed in the second shielding wall.
- first groove and the second groove may be disposed at different positions with respect to the column direction P.
- the first groove is disposed adjacent to the negative electrode of the battery cell in the first shielding wall
- the second groove is disposed adjacent to the positive electrode of the battery cell in the second shielding wall.
- a second shielding wall is disposed at another partition wall adjacent to the first groove formed in any one of the partition walls arranged in a plurality of rows, and any one of the partition walls arranged in a plurality of rows is disposed.
- a first shielding wall may be disposed at another partition wall adjacent to the second groove formed in the partition wall.
- the bus bar is disposed between the barrier ribs arranged in the plurality of rows and includes a first ground wire connected to the negative electrode of the battery cell and a second ground wire connected to the positive electrode of the battery cell. can include more.
- the first ground wire may be inserted into the first groove and connected to the negative electrode of the battery cell
- the second ground wire may be inserted into the second groove and connected to the positive electrode of the battery cell
- a module cover surrounding the barrier rib and the bus bar and coupled to the module frame may be further included.
- the module frame may include a lower frame having a lower cell mounting portion on which the lower portion of the battery cell is seated; and an upper frame formed with an upper cell mounting portion to which an upper portion of the battery cell is fixed.
- this can be expected to increase product stability by preventing the risk of burnout of driving equipment such as battery packs and electric vehicles equipped with battery packs.
- FIG. 1 is a view showing a partial cross-sectional structure of a conventional battery module in which a plurality of battery cells are mounted.
- FIG. 2 is a perspective view showing an external structure of a battery module in a battery pack according to the present invention.
- FIG 3 is an exploded perspective view of a battery module in a battery pack according to the present invention.
- FIG. 4 is a partial plan view showing a first embodiment of a barrier rib structure in a battery pack according to the present invention.
- FIG. 5 is a partial perspective view showing a first embodiment of a barrier rib structure in a battery pack according to the present invention.
- FIG. 6 is a partially enlarged view showing one of the barrier ribs disclosed in FIG. 5;
- FIG. 7 is a perspective view showing an external structure of a battery pack according to the present invention.
- FIG. 8 is a partial cross-sectional view showing the structure of a battery cell applied to a battery pack according to the present invention.
- FIG. 9 is a partial cross-sectional view showing an arrangement structure between a battery cell and a barrier rib in a battery pack according to the present invention.
- FIG. 10 is a partial plan view showing a second embodiment of a barrier rib structure in a battery pack according to the present invention.
- first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.
- the upper part may mean an upper part or upper surface of a specific component
- the lower part may mean a lower part or lower surface of a specific component
- the upward direction may mean an upward direction or an upward direction of a specific component, and may be a +Z axis direction when coordinates disclosed in the drawing are applied. Further, the downward direction may mean a lower direction or a lower direction of a specific component, and may be a -Z axis direction when coordinates disclosed in the drawing are applied.
- the column direction P in which the plurality of battery cells 400 or the partition walls 300 are disposed may be a direction in which the plurality of battery cells 400 or the partition walls 300 are arranged in a plurality of columns. Applying the disclosed coordinates may be in the Y-axis direction. Further, the width direction T may be a direction perpendicular to the column direction P in the plurality of battery cells 400 or partition walls 300 arranged in a single column, and may be an X-axis direction when coordinates disclosed in the drawing are applied. .
- the battery pack 700 includes a plurality of battery cells 400, a module frame 200, a partition wall 300, a bus bar 500, a module cover ( 720) and a control module 710.
- the plurality of battery cells 400 may be secondary batteries, and their types may be lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and the like, and batteries of other charging methods.
- lithium ion batteries lithium polymer batteries
- nickel cadmium batteries nickel hydride batteries
- nickel zinc batteries nickel zinc batteries, and the like
- batteries of other charging methods can include
- the module frame 200 can form the overall appearance of the battery pack 700, can accommodate the plurality of battery cells 400, and can protect the plurality of battery cells 400 from external impact.
- the module frame 200 may include a lower frame 210 and an upper frame 220 .
- the lower frame 210 and the upper frame 220 may be assembled by fasteners 230 such as bolts.
- a lower cell mounting portion 212 (refer to FIG. 3 ) in which the lower portions 404 of the plurality of battery cells 400 are seated and fixed may be formed on an inner lower surface of the lower frame 210 .
- the lower cell mounting portion 212 may be in the form of a block protruding upward (+Z), and the inside of the block is configured in a shape corresponding to the lower portion 404 of the battery cell 400, so that the battery cell 400 The lower part 404 of the can be supported and fixed.
- An upper cell mounting portion 222 (refer to FIG. 9 ) to which the upper portions 403 of the plurality of battery cells 400 are fixed may be formed on an inner upper surface of the upper frame 220 .
- the upper cell mounting portion 222 may be in the form of a block protruding downward (-Z), and the inside of the block is configured in a shape corresponding to the upper portion 403 of the battery cell 400 so that the battery cell 400 The upper part 403 of can be supported and fixed.
- the plurality of battery cells 400 may be arranged in a plurality of rows inside the module frame 200, and at this time, odd-numbered columns and even-numbered columns may be arranged in an alternating manner for space efficiency and flame propagation prevention structure.
- the barrier ribs 300 may be arranged in a plurality of columns at positions corresponding to respective columns formed by the plurality of battery cells 400 on the top of the module frame 200 . Accordingly, the barrier ribs 300 may also be disposed in such a way that odd-numbered columns and even-numbered columns are staggered from each other.
- the bus bar 500 is disposed between the partition walls 300 arranged in a plurality of rows, and the first ground line 510 connected to the negative electrode 402 of the battery cell 400 and the battery cell 400 It may include a second ground line 520 connected to the anode 401 of the.
- the barrier rib 300 may be disposed on at least a portion of an upper portion or a lower portion of the module frame 200 and may be configured to shield at least a portion of the battery cell 400 . According to this configuration, the barrier rib 300 can perform a function of blocking the spread of flame to other battery cells even if a flame is generated in some of the plurality of battery cells 400 .
- the meaning of 'partial part' used in the embodiment of the present invention may mean including the upper part, lower part, and upper and lower parts of the corresponding component. Therefore, being disposed on at least a part of the upper part or the lower part of the module frame 200 may mean that it may be disposed in the upper part or lower part of the module frame 200 or in a combination thereof.
- partition wall 300 is disposed on a part of the module frame 200 based on the fact that the partition wall 300 is disposed above the module frame 200, but is not limited thereto. .
- a portion of the battery cell 400 is described as meaning the upper portion 403 of the battery cell 400, but is not limited thereto.
- the partition wall 300 includes a center wall 321, a first shielding wall 323, a second shielding wall 325, a penetration part 340, a first groove 311, and A second groove 313 may be included.
- the center wall 321 may be disposed between adjacent battery cells among the plurality of battery cells 400 in the width direction T of the barrier rib 300, and between adjacent battery cells disposed in the same row. It can perform a barrier function.
- the center wall 321 functions as a shielding wall to prevent flames caused by a fire from spreading to adjacent battery cells disposed in the same row.
- first shielding wall 323 may be connected to one side portion 321b of the center wall 321 and disposed in a column direction P formed by the plurality of battery cells 400 .
- second shielding wall 325 may be connected to the other side portion 321c of the center wall 321 and disposed in a column direction P formed by the plurality of battery cells 400 .
- the penetrating portion 340 may open the upper portion 403 of the battery cell 400 and be surrounded by the center wall 321 and the first and second shielding walls 323 and 325 .
- the upper surface 323a of the first shielding wall 323 and the upper surface 325a of the second shielding wall 325 are positioned on the same plane as the upper surface 321a of the center wall 321. can do. Since the center wall 321 and the upper portion of the first and second shielding walls 323 and 325 are coupled with the module cover 720, the center wall 321 and the first and second shielding walls 323 and 325 are basically The module cover 720 can block the spread of flame to other battery cells even if a fire occurs in one battery cell.
- first groove 311 may be formed in the first shielding wall 323
- second groove 313 may be formed in the second shielding wall 325 .
- the first and second grooves 311 and 313 may be formed to electrically connect the bus bar 500 and the battery cell 400 to each other.
- the first ground wire 510 of the bus bar 500 is inserted into and disposed in the first groove 311 and is connected to the negative electrode 402 of the battery cell 400.
- the second ground line 520 of the bus bar 500 may be inserted into and disposed in the second groove 313 and connected to the positive electrode 401 of the battery cell 400 .
- the bottom surface 311a of the first groove 311 may be formed horizontally so that the first ground wire 510 can be seated and supported, and the Both side surfaces 311b and 311c may be formed perpendicular to the bottom surface 311a. Accordingly, as shown in FIG. 3 , when the bus bar 500 is seated on the upper frame 220 and assembled, the first ground wire 510 is stably placed on the bottom surface of the first groove 311 at the top. It can be inserted into (311a).
- the bottom surface 313a of the second groove 313 may be formed horizontally so that the second ground wire 520 can be seated and supported, and both side surfaces 313b and 313c of the second groove 313 This may be formed perpendicularly to the bottom surface 313a. Accordingly, when the bus bar 500 is seated on the upper frame 220 and assembled, the second ground wire 520 can be stably inserted into the bottom surface 313a of the second groove 313 from the top. can do.
- first groove 311 and the second groove 313 may be disposed at different positions based on the column direction P. This may be designed considering the position of the negative electrode 402 and the positive electrode 401 in the battery cell 400 .
- the first groove 311 may be disposed adjacent to the negative electrode 402 of the battery cell 400 in the first shielding wall 323, which is the first groove ( 311) and grounded to the negative electrode 402 of the battery cell 400, the position and shape of the first ground line 510 may be considered.
- the second groove 313 may be disposed adjacent to the positive electrode 401 of the battery cell 400 in the second shielding wall 325, which is inserted into the second groove 313 to the battery cell ( The position and shape of the second ground line 520 grounded to the anode 401 of 400 may be considered.
- the configuration in which the first groove 311 and the second groove 313 are disposed at different positions based on the column direction P can delay the propagation of flame when a fire occurs in a specific battery cell. can be designed for that purpose.
- the flame generated adjacent to the anode 401 in the specific battery cell 400 is first ejected through the second groove 313, and the first groove with a time difference. Since it reaches 311 and is ejected through the first groove 311, the spread of the flame can be delayed with a short time difference.
- the flame generated adjacent to the negative electrode 402 in a specific battery cell 400 is first ejected through the first groove 311, reaches the second groove 313 with a time difference, and passes through the second groove 313. Since it is ejected, it is also possible to delay the spread of the flame with a short time difference.
- FIGS. 4 to 6 a first embodiment of the structure of the barrier rib 300 is shown.
- the other adjacent barrier rib 300 facing the first groove 311 formed in any one of the barrier ribs 300 arranged in a plurality of rows has a second A shielding wall 325 is disposed, and a first shielding wall ( 323) may be placed.
- the first shielding wall 323 included in the partition wall 300 forming one of the plurality of rows of partition walls 300 is mutually related to each other based on the column direction P. It may be placed in a different location.
- the first ground wire 510 inserted into and disposed in the first groove 311 is formed in a curved shape and connected to the negative electrode 402 of the battery cell 400, and the second groove ( The second ground line 520 inserted into and disposed at 313 is formed in a straight line shape and is connected to the positive electrode 401 of the battery cell 400 .
- a second shielding wall 325 is formed in another adjacent column facing the first groove 311 disposed in one column, and a second shielding wall 325 is formed in another adjacent column facing the second groove 313 disposed in one column. 1 shielding wall 323 is formed.
- a specific battery cell 400a is damaged and a fire occurs, and the flame (arrow C) spreads to the first and second grooves 311 and 313 through the penetrating portion 340. there is.
- first and second grooves 311 and 313 function as passages through which flame spreads, even if the flame spreads through the first and second grooves 311 and 313, It is necessary to block the inflow into other adjacent battery cells 400 .
- the second shielding wall 325 is disposed to face the other adjacent column facing the first groove 311 formed in the barrier rib 300 in one column. The flame ejected through the first groove 311 is blocked by the second shielding wall 325 to prevent it from spreading.
- first shielding wall 323 is arranged to face the other adjacent row facing the second groove 313 formed in the partition wall 300 of one row, so that the flame ejected through the second groove 313 It can be blocked by the first shielding wall 323 to prevent diffusion.
- FIG. 10 shows a second embodiment of the partition wall 300 structure.
- the first ground wire 510 of the bus bar 500 is not bent and is formed in a straight line like the second ground wire 520. It can be.
- the first groove 311 may extend toward the negative electrode 402 of the battery cell 400 more than the second embodiment of the barrier rib 300 structure.
- the size and position of the first and second grooves 311 and 313 may be changed in correspondence to the position or shape of the first and second ground lines 510 and 520 formed in the bus bar 500 .
- the size and location of the first and second grooves 311 and 313 may be changed in correspondence with other types of bus bars 500 .
- the module cover 720 may surround the barrier rib 300 and the bus bar 500 and be coupled to the upper frame 220 .
- the control module 710 is mounted on the control module mounting part 240 (refer to FIG. 2 ) and can control the plurality of battery cells 400 .
- the battery module 100 and the control module 710 may be stacked in a plurality of stages.
- 7 shows a battery pack stacked in two stages, but is not limited thereto, and may be stacked or arranged in different numbers according to design capacity.
- FIG. 8 shows a partial cross-sectional structure of a cylindrical battery cell 400 mounted on the battery module 100 in an embodiment of the present invention.
- a cylindrical battery cell 400 applied to an embodiment of the present invention includes a current blocking device 410, a gasket 420, a heat-resistant member 430, a shield 440, an upper cap 450, and It may be configured to include a bent plate 460 .
- the current interruption device 410 may be a CID (Current Interrupt Device), which may be a device that automatically disconnects a contact when an overcurrent flows.
- the gasket 420 may be disposed along the circumference of the current blocking element 410, and leakage of the internal material of the battery cell 400 may be prevented.
- the heat-resistant member 430 may perform a function of protecting the battery cell 400 from external heat, and the shield 440 forms the exterior of the battery cell 400 and protects the battery cell 400 from external shock. It can perform a protective function.
- the upper cap 450 may be disposed on top of the battery cell 400 to form an anode, and may also serve to protect materials inside the battery cell 400 .
- a vent plate 460 may be disposed between the upper cap 450 and the current blocking element 410 .
- a flame may be generated and propagated as indicated by an arrow (B).
- the abnormal problem of the battery cell 400 is that the separator is damaged due to a design error of the battery cell 400 itself, causing a fire due to the reaction between the positive and negative materials, or overcharging due to a software error or incorrect setting of the operating equipment, A fire may occur due to overloading. Also, the flame of the battery cell 400 sealed in the battery module 100 may propagate through the upper portion as indicated by arrow B.
- FIG. 9 is a partial cross-sectional view showing an assembly structure between the battery cell 400 and the partition wall 300 in the battery pack 700 according to the present invention.
- the battery cell 400 is fixed to the upper cell mounting portion 222, and a flame is generated in a specific battery cell 400a to move the penetrating portion 340 of the barrier 300 upward (Z).
- the propagation of the flame C moving toward ) is blocked by the module cover 720 and propagates outward through the first groove 311 or the second groove 313.
- the flame is not propagated to other adjacent battery cells 400 disposed in the same row.
- the flame C propagating outward through the first groove 311 faces the second shielding wall 325 so as not to spread to the battery cell 400 disposed below the adjacent partition wall 300. do.
- the flame C propagating outward through the second groove 313 faces the first shielding wall 323 so as not to spread to the battery cell 400 disposed below the adjacent partition wall 300. do.
- the above information merely shows a specific embodiment of the battery pack.
- the present invention is a battery pack-related technology, and has industrial applicability.
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- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims (12)
- 복수의 배터리셀;상기 복수의 배터리셀을 수용하는 모듈프레임; 및상기 모듈프레임의 상부 또는 하부 중 적어도 일부분에 배치되고, 상기 배터리셀의 적어도 일부분을 차폐하는 격벽;을 포함하고,상기 격벽은 상기 복수의 배터리셀 중 일부의 배터리셀에 화염이 발생하더라도 다른 배터리셀들로 확산되는 것을 차단하는 것을 특징으로 하는 배터리팩.
- 제1항에 있어서,상기 복수의 배터리셀은 상기 모듈프레임의 내부에서 복수의 열로 배치되고,상기 격벽은 상기 모듈프레임의 상부 또는 하부 중 적어도 일부분에서 상기 복수의 배터리셀이 형성하는 각각의 열에 대응되는 위치에 복수의 열로 배치되는 것을 특징으로 하는 배터리팩.
- 제2항에 있어서,상기 격벽은,상기 복수의 배터리셀 중 인접한 배터리셀들의 사이에 배치되는 센터벽;상기 센터벽의 일측부에 연결되고, 상기 복수의 배터리셀이 형성하는 열 방향(P)으로 배치되는 제1 차폐벽;상기 센터벽의 타측부에 연결되고, 상기 복수의 배터리셀이 형성하는 열 방향(P)으로 배치되는 제2 차폐벽; 및상기 배터리셀의 적어도 일부분을 개방하고, 상기 센터벽과 상기 제1,2 차폐벽에 둘러쌓여 배치되는 관통부;를 포함하는 배터리팩.
- 제3항에 있어서,상기 복수의 열로 배치된 격벽 중 어느 하나의 열을 형성하는 격벽이 포함하는 제1 차폐벽 또는 제2 차폐벽과 인접한 다른 열을 형성하는 격벽이 포함하는 제1 차폐벽 또는 제2 차폐벽은, 상기 열 방향(P)을 기준으로 하여 서로 다른 위치에 배치되는 배터리팩.
- 제3항에 있어서,상기 격벽은,상기 제1 차폐벽에 형성되는 제1 홈; 및상기 제2 차폐벽에 형성되는 제2 홈;을 더 포함하는 배터리팩.
- 제5항에 있어서,상기 열 방향(P)을 기준으로 하여 상기 제1 홈과 상기 제2 홈은 서로 다른 위치에 배치되고,상기 복수의 배터리셀 중 일부 배터리셀에 화염이 발생할 때, 화염은 상기 제1 홈과 상기 제2 홈을 통해 시간차를 두고 분출되어 확산이 지연되는 것을 특징으로 하는 배터리팩
- 제6항에 있어서,상기 제1 홈은 상기 제1 차폐벽에서 상기 배터리셀의 음극에 인접하게 배치되고, 상기 제2 홈은 상기 제2 차폐벽에서 상기 배터리셀의 양극에 인접하게 배치되는 배터리팩.
- 제7항에 있어서,상기 복수의 열로 배치된 격벽 중 어느 하나의 격벽에 형성된 제1 홈에 마주하는 인접한 다른 격벽에는 제2 차폐벽이 배치되고,상기 복수의 열로 배치된 격벽 중 어느 하나의 격벽에 형성된 제2 홈에 마주하는 인접한 다른 격벽에는 제1 차폐벽이 배치되는 배터리팩.
- 제6항에 있어서,상기 복수의 열로 배치된 격벽들 사이에 배치되며, 상기 배터리셀의 음극에 연결되는 제1 접지선과 상기 배터리셀의 양극에 연결되는 제2 접지선을 포함하는 버스바;를 더 포함하는 배터리팩.
- 제9항에 있어서,상기 제1 접지선은 상기 제1 홈에 삽입되어 상기 배터리셀의 음극에 연결되고, 상기 제2 접지선은 상기 제2 홈에 삽입되어 상기 배터리셀의 양극에 연결되는 배터리팩.
- 제9항에 있어서,상기 격벽 및 버스바를 감싸며, 상기 모듈프레임에 결합되는 모듈커버;를 더 포함하는 배터리팩.
- 제1항에 있어서,상기 모듈프레임은,상기 배터리셀의 하부가 안착되는 하부 셀장착부가 형성된 하부프레임; 및상기 배터리셀의 상부가 고정되는 상부 셀장착부가 형성된 상부프레임;을 포함하는 배터리팩.
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KR20200021609A (ko) * | 2018-08-21 | 2020-03-02 | 에스케이이노베이션 주식회사 | 배터리 모듈 및 이의 제조방법 |
KR20210004189A (ko) * | 2019-07-03 | 2021-01-13 | 주식회사 엘지화학 | 방염 플레이트를 구비한 배터리 모듈, 이를 포함하는 배터리 랙 및 전력 저장 장치 |
JP6847864B2 (ja) * | 2016-01-26 | 2021-03-24 | 三洋電機株式会社 | 電池パック |
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US20160093842A1 (en) * | 2014-09-30 | 2016-03-31 | Google Inc. | Battery module |
JP6847864B2 (ja) * | 2016-01-26 | 2021-03-24 | 三洋電機株式会社 | 電池パック |
KR20190094921A (ko) * | 2018-02-06 | 2019-08-14 | 주식회사 엘지화학 | 배터리 모듈 및 이를 포함하는 배터리 팩 |
KR20200021609A (ko) * | 2018-08-21 | 2020-03-02 | 에스케이이노베이션 주식회사 | 배터리 모듈 및 이의 제조방법 |
KR20210004189A (ko) * | 2019-07-03 | 2021-01-13 | 주식회사 엘지화학 | 방염 플레이트를 구비한 배터리 모듈, 이를 포함하는 배터리 랙 및 전력 저장 장치 |
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