Battery module capable of detecting electrolyte leakage

Abstract

A battery module (10) capable of detecting electrolyte leakage includes a case (100) including a main frame (110) including a bottom (112) and first and second end frames (120 and 130) covering both ends of the main frame (110) in a first direction, one or more battery cells (200) arranged in an internal space (V) of the case (100), and a first leakage sensor (300) disposed on an upper surface of the bottom (112) and sensing electrolyte leaked from the one or more battery cells (200). The main frame (110) can further include a first notch (115) formed at one end of the bottom (112) in the first direction and connecting an upper portion and a lower portion of the bottom (112) to discharge the leaked electrolyte to the outside. The first leakage sensor (300) can be disposed adjacent to the first notch (115) and can be positioned inside the main frame (110) with respect to one end of the first notch (115) in the first direction.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application No. 10-2023-0152065, filed on November 6, 2023, the entire contents of which are included as part of this specification.

[0002] This invention relates to a battery module capable of detecting electrolyte leaks, and more specifically, to a battery module capable of: quickly, accurately and reliably detecting electrolyte leaks; preventing accidents such as fires in advance; facilitating the installation and maintenance of the leak sensor; and implementing the leak sensor at low cost using a simple construction. Background Technology

[0003] With technological advancements and increasing demand for mobile devices such as smartphones, laptops, and digital cameras, the technology for rechargeable and dischargeable secondary batteries is becoming increasingly active. Furthermore, secondary batteries are being used in electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (P-HEVs), and energy storage devices (ESS) as alternative energy sources to fossil fuels that generate air pollutants.

[0004] Currently, widely used types of rechargeable batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. Typically, these rechargeable battery cells are connected in series or parallel to form battery modules, depending on the required output voltage or charge / discharge capacity.

[0005] In particular, pouch-type lithium-ion batteries, which have a structure in which stacked or stacked / folded electrode assemblies are housed in a pouch-type battery casing made of aluminum laminates, are gradually increasing in use due to their advantages such as low manufacturing cost and high energy density.

[0006] However, pouch-type lithium-ion batteries have a problem because when the fused seals separate, flammable substances, such as the electrolyte, can leak, potentially causing a fire.

[0007] Therefore, there is a need for a battery module that can accurately and reliably detect electrolyte leaks and prevent accidents such as fires.

[0008] In addition, there is a need for a battery module capable of detecting electrolyte leaks, in which the leak sensor can be installed and maintained at low cost using a simple construction.

[0009] The prior art related to this invention is Korean Patent Publication No. 10-2023-0092218. Summary of the Invention

[0010] Technical issues

[0011] To address the aforementioned problems, the present invention aims to provide a battery module that can quickly, accurately, and reliably detect electrolyte leakage and prevent accidents such as fires in advance.

[0012] The purpose of this invention is to provide a battery module that can detect electrolyte leakage and facilitates the installation and maintenance of the leakage sensor.

[0013] The purpose of this invention is to provide a battery module capable of detecting electrolyte leakage, wherein the structure of the leakage sensor is simplified and the leakage sensor is miniaturized and lightweight.

[0014] The purpose of this invention is to provide a battery module that can detect electrolyte leakage and implement a leakage sensor at low cost using a simple construction.

[0015] The purpose of this invention is to provide a battery module that can detect electrolyte leakage in real time.

[0016] The purpose of this invention is to provide a battery module that can detect electrolyte leakage and improve the performance or sensitivity of the leakage sensor.

[0017] The purpose of this invention is to provide a battery module that can detect electrolyte leakage and has improved structural stability and insulation performance.

[0018] The technical problem to be solved by this invention is not limited to the above-described objectives, and other objectives and advantages of this invention not described herein will be understood through the following description and will become clearer through examples of this invention. Furthermore, it is apparent that the objectives and advantages of this invention can be implemented by the means specified in the claims and combinations thereof.

[0019] Technical solution

[0020] To address the aforementioned problems, the present invention provides a battery module 10 capable of detecting electrolyte leakage. The battery module 10 includes: a housing 100; one or more battery cells 200; and a first leakage sensor 300.

[0021] The housing 100 may include: a main frame 110; a first end frame 120; and a second end frame 130.

[0022] The main frame 110 may include a bottom 112 and a pair of sidewalls 113 and 114.

[0023] The main frame 110 may include a bottom 112 that extends along a first direction intersecting the vertical direction and a second direction intersecting the vertical direction and the first direction.

[0024] The sidewalls 113 and 114 can be connected to the two ends of the bottom 112 in the second direction, respectively.

[0025] The sidewalls 113 and 114 can extend in the vertical direction and the first direction.

[0026] The first end frame 120 and the second end frame 130 can cover both ends of the main frame 110 in the first direction.

[0027] One or more battery cells 200 may be arranged in the internal space V of the housing 100 defined by the main frame 110, the first end frame 120 and the second end frame 130.

[0028] The first leakage sensor 300 can be disposed on the upper surface of the bottom 112.

[0029] The first leakage sensor 300 can detect electrolyte leakage from one or more battery cells 200.

[0030] The main frame 110 may also include a first notch 115.

[0031] The first notch 115 can be located at one end of the bottom 112 in a first direction and be recessed inward.

[0032] The first notch 115 allows the upper and lower parts of the bottom 112 to communicate, so as to discharge the leaked electrolyte outside the housing 100.

[0033] The first leakage sensor 300 can be positioned adjacent to the first notch 115.

[0034] The first leakage sensor 300 can be configured to be closer to the inside of the main frame 110 than one end of the first notch 115 in the first direction.

[0035] In one embodiment, one or more battery cells 200 may extend in a vertical direction and a first direction.

[0036] Each of one or more battery cells 200 may include a first terminal 230.

[0037] The first terminal 230 may protrude to one side in the first direction.

[0038] The first terminal 230 can be located at one end of the internal space V in the first direction.

[0039] One or more battery cells 200 can be arranged side by side in the second direction.

[0040] In one embodiment, the bottom 112 may include: a first bottom portion 1122; and a second bottom portion 1124.

[0041] The first bottom portion 1122 may correspond to the central portion of the bottom 112 in the first direction.

[0042] The second bottom portion 1124 may be located on one side of the first bottom portion 1122 in a first direction. The second bottom portion 1124 may have an upper surface that is lower than the upper surface of the first bottom portion 1122.

[0043] The first notch 115 can be located at one end of the second bottom portion 1124 in a first direction.

[0044] The first leakage sensor 300 can be located at the second bottom portion 1124.

[0045] In one embodiment, each of one or more battery cells 200 may include: a receiving portion 210; an extension portion 220; and a first terminal 230 and a second terminal 240.

[0046] The receiving part 210 can accommodate the electrode assembly and the electrolyte.

[0047] The receiving part 210 can extend in the vertical direction and the first direction.

[0048] The extension 220 can extend outward from the edge of the receiving portion 210.

[0049] The extension 220 can seal the electrode assembly and electrolyte housed in the receiving part 210.

[0050] The first terminal 230 and the second terminal 240 can be connected to the electrode assembly.

[0051] The first terminal 230 and the second terminal 240 can protrude outward through the extension 220.

[0052] The extension 220 may include a first extension 222.

[0053] The first extension 222 may be provided on one side of the receiving portion 210 in the first direction.

[0054] The first terminal 230 can protrude to one side in a first direction through the first extension 222.

[0055] One or more battery cells 200 can be arranged side by side in the second direction.

[0056] The first bottom portion 1122 may face the receiving portion 210 of one or more battery cells 200 in the vertical direction.

[0057] The second bottom portion 1124 may face the first extension 222 of one or more battery cells 200 in the vertical direction.

[0058] In one implementation, the main frame 110 may also include a first dam 117.

[0059] The first dam 117 can protrude upward from the upper surface of one side end of the bottom 112 in the first direction.

[0060] The first dam 117 can extend along the second direction or extend at an angle toward the second direction in the first direction.

[0061] The first dam 117 may not extend in the first opening section O1 in the second direction.

[0062] The first dam 117 may include a first disconnected portion E1 that defines the first opening section O1.

[0063] At least a portion of the leaked electrolyte can flow into the first notch 115 through the portion adjacent to the first disconnected portion E1 and corresponding to the first open section O1.

[0064] The first leakage sensor 300 can be configured to be adjacent to the first disconnection portion E1.

[0065] At least a portion of the first leakage sensor 300 may be disposed in the first opening section O1.

[0066] In one embodiment, the first dam 117 may be located at one end of the bottom 112 in a first direction.

[0067] Therefore, the first opening section O1 can at least partially overlap with the first section S1 in the second direction, which is provided with the first notch 115.

[0068] In addition, the first disconnected portion E1 may overlap at least partially with the first notch 115 in the first direction.

[0069] The other end of the first disconnected portion E1 in the first direction can be located at a point corresponding to the other end of the first notch 115 in the first direction, or it can be located closer to the other side of the first direction than the other end of the first notch 115 in the first direction.

[0070] The first leakage sensor 300 can be configured to be closer to the other side of the first direction than the first disconnection portion E1.

[0071] The first leakage sensor 300 can be configured to be adjacent to the first disconnection portion E1.

[0072] At least a portion of the first leakage sensor 300 may be located at the first opening section O1 or the first section S1.

[0073] In one embodiment, the first end frame 120 may at least partially cover the first notch 115 from above.

[0074] In one embodiment, the first leakage sensor 300 may include a conductor 320 forming a circuit.

[0075] When the leaked electrolyte comes into contact with conductor 320, at least one of the circuit’s resistance, current and voltage changes.

[0076] In one embodiment, conductor 320 may include one or more first electrode conductors 322 and one or more second electrode conductors 324.

[0077] One or more first electrode conductors 322 and one or more second electrode conductors 324 may extend in a predetermined direction.

[0078] One or more first electrode conductors 322 and one or more second electrode conductors 324 may be arranged side by side alternately.

[0079] The one or more first electrode conductors 322 and the one or more second electrode conductors 324 may be spaced apart from each other by a predetermined distance.

[0080] One or more first conductors 322 and one or more second conductors 324 can form a circuit.

[0081] When the leaked electrolyte comes into contact with at least one of the first conductors 322 and at least one of the second conductors 324 simultaneously, such that at least one of the first conductors 322 and at least one of the second conductors 324 are electrically connected via the leaked electrolyte, at least one of the circuit’s resistance, current and voltage can be changed.

[0082] In one embodiment, one or more first electrode conductors 322 may be connected to each other.

[0083] One or more second electrode conductors 324 can be connected to each other.

[0084] In one implementation, the main frame 110 may also include a first dam 117.

[0085] The first dam 117 can protrude upward from the upper surface of one side end of the bottom 112 in the first direction.

[0086] The first dam 117 may extend along the second direction or extend obliquely toward the second direction in the first direction.

[0087] The first dam 117 may not extend in the first opening section O1 in the second direction.

[0088] The first dam 117 may include a first disconnected portion E1 that defines the first opening section O1.

[0089] At least a portion of the leaked electrolyte can flow into the first notch 115 through the portion adjacent to the first disconnected portion E1 and corresponding to the first open section O1.

[0090] The first leakage sensor 300 can be configured to be adjacent to the first disconnection portion E1.

[0091] At least a portion of the first leakage sensor 300 may be disposed in the first opening section O1.

[0092] The intended direction can be parallel to the overall extension direction of the first dam 117.

[0093] In one embodiment, a battery module capable of detecting electrolyte leakage may include: a first busbar; and a first busbar frame 510.

[0094] The first busbar can be located at one end of the internal space V in the first direction.

[0095] The first busbar can be electrically connected to the first terminal 230 of each of one or more battery cells 200.

[0096] The first busbar frame 510 can be arranged above the first leakage sensor 300.

[0097] The first busbar frame 510 can support the first busbar.

[0098] In one embodiment, the lower end portion of the first busbar frame 510 may be located on the opposite side of the first leakage sensor 300 in the first direction.

[0099] In one embodiment, the battery module capable of detecting electrolyte leakage may also include a second leakage sensor 400.

[0100] The second leakage sensor 400 can be disposed on the upper surface of the bottom 112.

[0101] The second leakage sensor 400 can detect electrolyte leakage from one or more battery cells 200.

[0102] The main frame 110 may also include a second notch 116.

[0103] The second notch 116 can be located at the other end of the bottom 112 in the first direction and be recessed inward.

[0104] The second notch 116 allows the upper and lower parts of the bottom 112 to communicate, so as to discharge the leaked electrolyte outside the housing 100.

[0105] The second leakage sensor 400 can be positioned adjacent to the second notch 116.

[0106] The second leakage sensor 400 can be configured to be closer to the inside of the main frame 110 than the other end of the second notch 116 in the first direction.

[0107] Beneficial effects

[0108] According to an embodiment of the present invention, a battery module 10 capable of detecting electrolyte leakage may include: a housing 100; one or more battery cells 200; and a first leakage sensor 300. The housing 100 may include: a main frame 110; a first end frame 120; and a second end frame 130. The main frame 110 may include a bottom 112 and a pair of sidewalls 113 and 114. The main frame 110 may include the bottom 112, which extends along a first direction intersecting a vertical direction and a second direction intersecting both the vertical and first directions. The pair of sidewalls 113 and 114 may be respectively connected to the two ends of the bottom 112 in the second direction. The pair of sidewalls 113 and 114 may extend along the vertical and first directions. The first end frame 120 and the second end frame 130 may cover the two ends of the main frame 110 in the first direction. One or more battery cells 200 may be arranged in the internal space V of the housing 100 defined by the main frame 110, the first end frame 120, and the second end frame 130. A first leakage sensor 300 may be disposed on the upper surface of the bottom 112. The first leakage sensor 300 may detect electrolyte leakage from one or more battery cells 200. The main frame 110 may also include a first recess 115. The first recess 115 may be disposed at one end of the bottom 112 in a first direction and recessed inward. The first recess 115 may connect the upper and lower parts of the bottom 112 to allow leaked electrolyte to drain out of the housing 100. The first leakage sensor 300 may be disposed adjacent to the first recess 115. The first leakage sensor 300 may be disposed closer to the inside of the main frame 110 than the first end of the first recess 115 in the first direction.

[0109] Therefore, the first leakage sensor 300 is not only disposed on the upper surface of the bottom 112 of the housing 100 where the electrolyte accumulates, but is also disposed adjacent to the first notch 115 for discharging the electrolyte, so that the electrolyte leaking from the battery module 10 can be detected accurately and reliably, and accidents such as fires can be prevented in advance.

[0110] Furthermore, since the first leakage sensor 300 is located at one end of the bottom 112 in the first direction, the first leakage sensor 300 can be easily exposed to the outside. In particular, when the first end frame 120 can be separated from the main frame 110, the first leakage sensor 300 can be easily exposed to the outside by separating and removing the first end frame 120. Therefore, the installation and maintenance of the first leakage sensor 300 can be facilitated.

[0111] Furthermore, since the first leakage sensor 300 is located inside the main frame 110, rather than at one end of the first notch 115 in the first direction, the structure of the first leakage sensor 300 can be simplified, and the first leakage sensor 300 can be miniaturized and lightweight. For example, the first leakage sensor 300 may not have a structure surrounding the entire first notch 115.

[0112] According to embodiments of the present invention, one or more battery cells 200 may extend along a vertical direction and a first direction. Each of the one or more battery cells 200 may include a first terminal 230. The first terminal 230 may protrude to one side in the first direction. The first terminal 230 may be disposed at one end of the internal space V in the first direction. One or more battery cells 200 may be arranged side by side in a second direction.

[0113] Therefore, the first leakage sensor 300 can be positioned close to the first terminal 230 of the battery cell 200. As a result, the first leakage sensor 300 can be easily connected to electrical components (e.g., ICB, interconnecting circuit board) located near the terminals of the battery cell 200. This facilitates the installation and maintenance of the first leakage sensor 300.

[0114] According to an embodiment of the present invention, the bottom 112 may include: a first bottom portion 1122; and a second bottom portion 1124. The first bottom portion 1122 may correspond to the central portion of the bottom 112 in a first direction. The second bottom portion 1124 may be located on one side of the first bottom portion 1122 in the first direction. The second bottom portion 1124 may have an upper surface that is lower than the upper surface of the first bottom portion 1122. A first notch 115 may be provided at one end of the second bottom portion 1124 in the first direction. A first leakage sensor 300 may be provided at the second bottom portion 1124.

[0115] Therefore, the first leakage sensor 300 can not only be positioned at the second bottom portion 1124, where electrolyte can be easily collected due to its low position, but also adjacent to the first notch 115 for discharging electrolyte in the second bottom portion 1124. Thus, electrolyte leakage from the battery module 10 can be accurately and reliably detected, and accidents such as fires can be prevented in advance.

[0116] According to an embodiment of the present invention, each of one or more battery cells 200 may include: a receiving portion 210; an extension portion 220; and a first terminal 230 and a second terminal 240. The receiving portion 210 may accommodate an electrode assembly and an electrolyte. The receiving portion 210 may extend in a vertical direction and a first direction. The extension portion 220 may extend outward from the edge of the receiving portion 210. The extension portion 220 may seal the receiving portion 210 when the electrode assembly and electrolyte are accommodated within it. The first terminal 230 and the second terminal 240 may be connected to the electrode assembly. The first terminal 230 and the second terminal 240 may protrude outward through the extension portion 220. The extension portion 220 may include a first extension portion 222. The first extension portion 222 may be disposed on one side of the receiving portion 210 in the first direction. The first terminal 230 may protrude to one side in the first direction through the first extension portion 222. One or more battery cells 200 may be arranged side-by-side in a second direction. A first bottom portion 1122 may face the receiving portion 210 of each of the one or more battery cells 200 in a vertical direction. The second bottom portion 1124 may face the first extension 222 of each of one or more battery cells 200 in the vertical direction.

[0117] Therefore, the second bottom portion 1124, having a lower upper surface and a first notch 115, is positioned below the first extension 222, which surrounds and seals the first terminal 230, thus facilitating electrolyte leakage and allowing for easy collection and discharge of the electrolyte. Since the first leakage sensor 300 is located at the second bottom portion 1124 and adjacent to the first notch 115, electrolyte leakage from the battery module 10 can be detected quickly, accurately, and reliably, and accidents such as fires can be prevented in advance.

[0118] Furthermore, even when the first extension 222 is provided with a protruding portion B that, when unfolded, protrudes further downward in the vertical direction than the receiving portion 210 (e.g., a bat ear), the upper surface of the second bottom portion 1124 is positioned lower than the upper surface of the first bottom portion 1122 that supports the receiving portion 210, so that the protruding portion B is not significantly bent or folded by the second bottom portion 1124. Therefore, the seal of the first extension 222 can be prevented from being released.

[0119] According to an embodiment of the present invention, the main frame 110 may further include a first dam 117. The first dam 117 may project upward from the upper surface of one end of the bottom 112 in a first direction. The first dam 117 may extend along a second direction or extend obliquely toward the second direction in the first direction. The first dam 117 may not extend in the first opening section O1 in the second direction. The first dam 117 may include a first break portion E1 defining the first opening section O1. At least a portion of the leaked electrolyte may flow into the first recess 115 through a portion adjacent to the first break portion E1 and corresponding to the first opening section O1. A first leak sensor 300 may be disposed adjacent to the first break portion E1. At least a portion of the first leak sensor 300 may be disposed in the first opening section O1.

[0120] Therefore, the first leakage sensor 300 can be placed not only at a location where the electrolyte can be easily collected through the first dam 117, but also at or near a location through which the electrolyte passes when it is discharged to the outside. This allows for accurate and reliable detection of electrolyte leakage in the battery module 10, and can prevent accidents such as fires in advance.

[0121] According to an embodiment of the present invention, the first dam 117 may be disposed at one end of the bottom 112 in a first direction. Therefore, the first opening section O1 may at least partially overlap with the first section S1 in a second direction, where the first notch 115 is disposed. Additionally, the first break portion E1 may at least partially overlap with the first notch 115 in the first direction. The other end of the first break portion E1 in the first direction may be disposed at a point corresponding to the other end of the first notch 115 in the first direction, or may be disposed closer to the other side of the first direction than the other end of the first notch 115 in the first direction. The first leakage sensor 300 may be disposed closer to the other side of the first direction than the first break portion E1. The first leakage sensor 300 may be disposed adjacent to the first break portion E1. At least a portion of the first leakage sensor 300 may be disposed at the first opening section O1 or the first section S1.

[0122] Therefore, the first leakage sensor 300 can be positioned closer to the inside than the first dam 117 at one end of the bottom 112 in the first direction, where most of the electrolyte flowing towards one side of the housing 110 in the first direction accumulates. Additionally, the first leakage sensor 300 can be positioned at or near the portion through which the electrolyte passes when it is discharged to the outside. Thus, leakage of electrolyte from the battery module 10 can be accurately and reliably detected, and accidents such as fires can be prevented in advance.

[0123] According to an embodiment of the present invention, the first end frame 120 may at least partially cover the first notch 115 from above.

[0124] Therefore, the amount of electrolyte discharged to the outside through the first notch 115 without passing through the first leak sensor 300 can be reduced. For example, electrolyte flowing on the side closer to the first direction than the first notch 115, or flowing above or falling into the first notch 115, flows towards the bottom 112 due to the first end frame 120 at least partially covering the first notch 115 from above, and then passes through the first leak sensor 300, instead of flowing directly into the first notch 115. As a result, the detection accuracy of electrolyte leakage in the battery module 10 can be improved.

[0125] According to an embodiment of the present invention, the first leakage sensor 300 may include a conductor 320 forming a circuit. When the leaked electrolyte comes into contact with the conductor 320, at least one of the circuit's resistance, current, and voltage changes.

[0126] Therefore, the first leak sensor 300 can be easily implemented at low cost using a simple configuration. Furthermore, electrolyte leaks can be detected in real time.

[0127] According to embodiments of the present invention, conductor 320 may include one or more first conductors 322 and one or more second conductors 324. The one or more first conductors 322 and one or more second conductors 324 may extend in a predetermined direction. The one or more first conductors 322 and one or more second conductors 324 may be arranged alternately side-by-side. The one or more first conductors 322 and one or more second conductors 324 may be spaced apart from each other by a predetermined distance. The one or more first conductors 322 and one or more second conductors 324 may form a circuit. When the leaked electrolyte simultaneously contacts at least one first conductor of one or more first conductors 322 and at least one second conductor of one or more second conductors 324, such that at least one first conductor of one or more first conductors 322 and at least one second conductor of one or more second conductors 324 are electrically connected via the leaked electrolyte, at least one of the circuit's resistance, current, and voltage may change.

[0128] Therefore, the first leakage sensor 300 can be easily implemented at low cost using a simple configuration.

[0129] In addition, since the leakage detection area or leakage detection width of the first leakage sensor 300 can be increased, or the distance between the first electrode conductor 322 and the second electrode conductor 324 can be reduced, the performance or sensitivity of the first leakage sensor 300 can be improved.

[0130] According to an embodiment of the present invention, one or more first electrode conductors 322 may be connected to each other. One or more second electrode conductors 324 may be connected to each other.

[0131] Therefore, the first leakage sensor 300 can be easily implemented at low cost using a simple configuration.

[0132] According to an embodiment of the invention, the main frame 110 may further include a first dam 117. The first dam 117 may project upward from the upper surface of one end of the bottom 112 in a first direction. The first dam 117 may extend along a second direction or extend obliquely toward the second direction in the first direction. The first dam 117 may not extend within the first opening section O1 in the second direction. The first dam 117 may include a first break portion E1 defining the first opening section O1. At least a portion of the leaked electrolyte may flow into the first recess 115 through a portion adjacent to the first break portion E1 and corresponding to the first opening section O1. A first leak sensor 300 may be disposed adjacent to the first break portion E1. At least a portion of the first leak sensor 300 may be disposed within the first opening section O1. A predetermined direction may be parallel to the overall extension direction of the first dam 117.

[0133] Therefore, the first conductor 322 and the second conductor 324 of the first leakage sensor 300 can effectively block the portion of the first dam 117 that is cut off and opened. As a result, leakage of electrolyte from the battery module 10 can be detected accurately and reliably, and the first leakage sensor 300 can be easily implemented at low cost using a simple configuration, and the first leakage sensor 300 can also be miniaturized.

[0134] In addition, since the distance between the first electrode conductor 322 and the second electrode conductor 324 can be reduced, the performance or sensitivity of the first leakage sensor 300 can be improved.

[0135] According to an embodiment of the present invention, a battery module capable of detecting electrolyte leakage may include: a first busbar; and a first busbar frame 510. The first busbar may be disposed at one end of the internal space V in a first direction. The first busbar may be electrically connected to a first terminal 230 of each of one or more battery cells 200. The first busbar frame 510 may be disposed above the first leakage sensor 300. The first busbar frame 510 may support the first busbar.

[0136] Therefore, electrolyte leaking from one end of the battery cell 200 in the first direction and flowing along the surface of the first busbar frame 510 can easily accumulate at the bottom 112 and pass through the first leakage sensor 300. Thus, electrolyte leakage from the battery module 10 can be detected accurately and reliably, and accidents such as fires can be prevented in advance.

[0137] According to an embodiment of the present invention, the lower end portion of the first busbar frame 510 may be disposed on the other side of the first leakage sensor 300 in the first direction.

[0138] Therefore, even when the first leakage sensor 300 is located at the bottom 112, the first busbar frame 510 can extend downwards. When the first busbar frame 510 extends downwards, it can be stably supported by contacting the bottom 112 and being inserted between the battery cell 200 and the bottom 112, thereby improving insulation performance. In other words, not only can electrolyte leakage in the battery cell 200 be detected accurately and reliably, but the structural stability and insulation performance of the battery module 10 can also be improved.

[0139] According to an embodiment of the present invention, the battery module capable of detecting electrolyte leakage may further include a second leakage sensor 400. The second leakage sensor 400 may be disposed on the upper surface of the bottom 112. The second leakage sensor 400 can detect electrolyte leakage from one or more battery cells 200. The main frame 110 may also include a second recess 116. The second recess 116 may be disposed at the other end of the bottom 112 in a first direction and is recessed inward. The second recess 116 allows the upper and lower parts of the bottom 112 to communicate, thereby discharging leaked electrolyte outside the housing 100. The second leakage sensor 400 may be disposed adjacent to the second recess 116. The second leakage sensor 400 may be disposed closer to the inner side of the main frame 110 than the other end of the second recess 116 in the first direction.

[0140] Therefore, the first notch 115 and the second notch 116 are provided at both ends of the bottom 112 of the housing 100 in the first direction, and the first leakage sensor 300 and the second leakage sensor 400 are arranged adjacent to the first notch 115 and the second notch 116 on the upper surface of the bottom 112, so that the leakage of electrolyte from the battery module 10 can be accurately and reliably detected, and accidents such as fires can be prevented in advance.

[0141] Furthermore, since the first leakage sensor 300 and the second leakage sensor 400 can be exposed to the outside, their installation and maintenance are facilitated. For example, when the first end frame 120 and the second end frame 130 are separated and removed from the main frame 110, the first leakage sensor 300 and the second leakage sensor 400 can be easily exposed to the outside.

[0142] Furthermore, since the first leakage sensor 300 and the second leakage sensor 400 are located inside the main frame 110, rather than at one end of the first recess 115 and the second recess 116 in the first direction, the structure of the first leakage sensor 300 and the second leakage sensor 400 can be simplified, and they can also be miniaturized and lightweight. For example, the first leakage sensor 300 and the second leakage sensor 400 do not necessarily need to have a structure that surrounds the entire first recess 115 and the second recess 116 respectively.

[0143] In addition to the aforementioned beneficial effects, the specific effects of the present invention will be further described in detail as the specific features of the invention are described. Attached Figure Description

[0144] Figure 1 This is a perspective view showing a portion of a battery module capable of detecting electrolyte leakage according to a first embodiment of the present invention.

[0145] Figure 2 and Figure 3 These are shown in the case of no battery cells. Figure 1 The diagram shows a bottom surface perspective view and an exploded perspective view of a portion of the battery module.

[0146] Figure 4 and Figure 5 It is along Figure 1 Enlarged section of line 4-4' Figure 1 The cross-sectional view of the part indicated by the dashed line in the figure.

[0147] Figure 6 and Figure 7 It is shown Figure 1 The bottom of the section indicated by the dashed line and the magnified view of the first leak sensor.

[0148] Figure 8 It is shown Figures 1 to 7 A three-dimensional view of the first leakage sensor.

[0149] Figure 9 It is shown Figure 1 The front view of the battery cell.

[0150] Figure 10 This is shown in the case of having battery cells. Figure 5 A view of the structure.

[0151] Figure 11 and Figure 12 This is an enlarged cross-sectional view of a portion of a battery module capable of detecting electrolyte leakage according to a second embodiment of the present invention.

[0152] [Explanation of reference numerals in the attached figures]

[0153] 10: Battery modules capable of detecting electrolyte leaks

[0154] 100: Casing

[0155] 110: Main frame 112: Bottom

[0156] 1122: First bottom section; 1124: Second bottom section

[0157] 1126: Third bottom section

[0158] 113: Side wall 114: Side wall

[0159] 115: First notch 116: Second notch

[0160] 117: First Dam 118: Second Dam

[0161] O1: First opening section; S1: First section

[0162] E1: First disconnected section

[0163] 120: First end frame; 130: Second end frame

[0164] P1: End portion

[0165] 200: Battery cell; 210: Receiving section

[0166] 220: Extension B: Protruding part

[0167] 222: First extension; 224: Second extension

[0168] 230: First terminal; 240: Second terminal

[0169] 300: First Leakage Sensor

[0170] 310: Circuit board; 320: Conductor

[0171] 322: First conductor; 324: Second conductor

[0172] 326: First extreme 328: Second extreme

[0173] 400: Second Leakage Sensor

[0174] 510: First busbar framework Detailed Implementation

[0175] The above-described objects, features, and advantages will now be described in detail with reference to the accompanying drawings, enabling those skilled in the art to realize the technical concept of the present invention. In describing the present invention, detailed descriptions of prior art related to the present invention will be omitted where it is determined that such detailed descriptions unnecessarily obscure the gist of the invention. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In these drawings, the same reference numerals are used to denote the same or similar parts.

[0176] Although terms such as "first," "second," etc., are used to describe various elements, these elements are of course not limited by these terms. These terms are only used to distinguish one element from another, and unless otherwise specified, the first element may also be the second element.

[0177] Throughout this specification, unless otherwise stated, each element may be singular or plural.

[0178] In the following text, "arranging a component above (or below) a component" or "arranging a component on top (or bottom) of a component" means not only "arranging a component to contact the upper (or lower) surface," but also "arranging a component above the upper (or lower) surface when another component is inserted between them."

[0179] Additionally, when an element is described as being “connected to,” “linked to,” or “in contact with” another element, it should be understood that the element may be “directly connected to,” “directly linked to,” or “directly in contact with” another element, or that the element may be “connected to,” “linked to,” or “in contact with” another element if another element is inserted between or via another element.

[0180] Unless the context clearly indicates otherwise, the singular expressions used herein include the plural expressions. Terms such as “consisting of” or “comprising” as used herein should not be construed as including all elements or steps described in the specification, but rather as excluding some of the elements or steps, or including additional elements or steps.

[0181] Figure 1 This is a perspective view showing a portion of a battery module capable of detecting electrolyte leakage according to a first embodiment of the present invention. Figure 2 and Figure 3 These are shown in the case of no battery cells. Figure 1 The diagram shows a bottom surface perspective view and an exploded perspective view of a portion of the battery module. Figure 4 and Figure 5 It is along Figure 1 Enlarged section of line 4-4' Figure 1 The cross-sectional view of the part indicated by the dashed line in the figure. Figure 6 and Figure 7 It is shown Figure 1 The bottom of the section indicated by the dashed line and the magnified view of the first leak sensor. Figure 8 It is shown Figures 1 to 7 A three-dimensional view of the first leakage sensor. Figure 9 It is shown Figure 1 The front view of the battery cell. Figure 10 This is shown in the case of having battery cells. Figure 5 A view of the structure. Figure 11 and Figure 12 This is an enlarged cross-sectional view of a portion of a battery module capable of detecting electrolyte leakage according to a second embodiment of the present invention.

[0182] [First Embodiment of a Battery Module Capable of Detecting Electrolyte Leakage]

[0183] Reference Figure 1 The battery module 10 capable of detecting electrolyte leakage according to the first embodiment may include a housing 100, one or more battery cells 200, and a first leakage sensor 300. The battery module 10 capable of detecting electrolyte leakage may also include a second leakage sensor 400. Figure 3 Each element will be described below.

[0184] [case]

[0185] Reference Figure 2 and Figure 3 The housing 100 may include: a main frame 110; a first end frame 120; and a second end frame 130.

[0186] The main frame 110 may include a bottom 112 and a pair of sidewalls 113 and 114. The main frame 110 may also include a first notch 115. The main frame 110 may also include a second notch 116. The main frame 110 may also include a first dam 117. The main frame 110 may also include a second dam 118.

[0187] The main frame 110 may include a bottom 112 that extends along a first direction (e.g., left-right direction) intersecting the vertical direction and a second direction (e.g., front-back direction) intersecting the vertical direction and the first direction.

[0188] The bottom portion 112 may include a first bottom portion 1122 and a second bottom portion 1124. The bottom portion 112 may also include a third bottom portion 1126.

[0189] The first bottom portion 1122 may correspond to the central portion of the bottom 112 in a first direction. The first bottom portion 1122 may face the receiving portion 210 of each of one or more battery cells 200 in a vertical direction. Figure 1 and Figure 10 ).

[0190] The second bottom portion 1124 may be located on one side (e.g., the left side) of the first bottom portion 1122 in a first direction. The second bottom portion 1124 may have an upper surface that is lower than the upper surface of the first bottom portion 1122. The second bottom portion 1124 may face the first extension 222 of each of one or more battery cells 200 in a vertical direction. Figure 1 and Figure 10 ).

[0191] The third bottom portion 1126 may be located on the opposite side (e.g., the right side) of the first bottom portion 1122 in the first direction. The upper surface of the third bottom portion 1126 may be lower than the upper surface of the first bottom portion 1122. The third bottom portion 1126 may face the second extension 224 of each of one or more battery cells 200 in the vertical direction.

[0192] The pair of sidewalls 113 and 114 can be respectively connected to the two ends of the bottom 112 in the second direction. The pair of sidewalls 113 and 114 can extend in the vertical direction and the first direction.

[0193] Reference Figures 4 to 7 The first notch 115 may be provided at one end (e.g., the left end) of the bottom 112 in a first direction and recessed inward. For example, the first notch 115 may be provided at one end of the second bottom portion 1124 in a first direction. The first notch 115 can connect the upper and lower parts of the bottom 112. As a result, the first notch 115 can drain leaked electrolyte outside the housing 100.

[0194] The second notch 116 can be located at the other end of the bottom 112 in the first direction and be recessed inward. Figure 3 For example, a second notch 116 may be provided at the other end of the third bottom portion 1126 in the first direction. The second notch 116 can connect the upper and lower portions of the bottom portion 112. As a result, the second notch 116 can discharge leaked electrolyte outside the housing 100.

[0195] The first dam 117 can protrude upward from the upper surface of the first end portion in the first direction of the bottom 112. Figures 3 to 7 The first dam 117 may extend along the second direction or extend obliquely toward the second direction in the first direction. The first dam 117 may not extend in the first opening section O1 in the second direction.

[0196] Here, for example, when the bottom 112 is due to the first notch 115 ( Figure 6 When the first dam 117 is not located below the first dam 117, or when the first dam 117 is blocked by the side walls 113 and 114, the first dam 117 may not extend.

[0197] The first dam 117 may include a first disconnected portion E1 defining a first open section O1. The first disconnected portion E1 may face the first open section O1. At least a portion of the leaked electrolyte may flow into the first notch 115 through a portion adjacent to the first disconnected portion E1 and corresponding to the first open section O1.

[0198] The first dam 117 can be set at one end of the bottom 112 in the first direction. Figures 3 to 6 Therefore, the first opening segment O1 can at least partially overlap with the first segment S1 in the second direction, where the first notch 115 is provided. Additionally, the first break portion E1 can at least partially overlap with the first notch 115 in the first direction. Figure 6 and Figure 7 ).

[0199] The other end of the first disconnected portion E1 in the first direction can be located at a point corresponding to the other end of the first notch 115 in the first direction, or it can be located closer to the other side of the first direction than the other end of the first notch 115 in the first direction.

[0200] Second Dam 118 ( Figure 1 This can be inferred from the first dam, 117.

[0201] The first end frame 120 and the second end frame 130 can cover both ends of the main frame 110 in a first direction. The first end frame 120 and the second end frame 130 can be separated from the main frame 110.

[0202] The first end frame 120 and the second end frame 130 can contact the bottom 112 in a first direction. Therefore, the first end frame 120 and the second end frame 130 can respectively cover one side of the first recess 115 in the first direction and the second recess 116 on the other side in the first direction.

[0203] The internal space V of the housing 100 can be composed of the main frame 110, the first end frame 120, and the second end frame 130. Figure 1 )limited.

[0204] The first end frame 120 may at least partially cover the first notch 115 from above. For example, the end portion P1 of the first end frame 120 may at least partially cover the first notch 115 from above. Figure 4 , Figure 5 and Figure 10 ).

[0205] Therefore, the amount of electrolyte discharged to the outside through the first notch 115 without passing through the first leakage sensor 300 can be reduced. For example, electrolytes flowing on the side closer to the first direction than the first notch 115, or flowing above the first notch 115, or falling into the first notch 115 (e.g., along the first end frame 120, Figure 11 and Figure 12 The electrolyte flowing through the first busbar frame 510 or the first inner cover 610 flows from the top at least partially covering the first end frame 120 of the first recess 115 to the bottom 112, and then through the first leak sensor 300, instead of flowing directly into the first recess 115. As a result, the detection accuracy of electrolyte leakage in the battery module 10 can be improved.

[0206] Furthermore, matters not mentioned in the second end frame 130 can be inferred from the first end frame 120.

[0207] [Battery Cells]

[0208] The battery module 10, capable of detecting electrolyte leakage, may include one or more battery cells 200. The one or more battery cells 200 may be arranged within the internal space V of the housing 100. The one or more battery cells 200 may be arranged side-by-side in a second direction. The one or more battery cells 200 will be described below.

[0209] Reference Figure 9 According to the embodiment, one or more battery cells 200 may extend in a vertical direction and a first direction. Each of the one or more battery cells 200 may include a receiving portion 210 and an extension portion 220. Each of the one or more battery cells 200 may include a first terminal 230. Each of the one or more battery cells 200 may include a second terminal 240.

[0210] The receiving portion 210 can accommodate the electrode assembly and the electrolyte. The receiving portion 210 can extend in the vertical direction and the first direction.

[0211] The extension 220 may extend outward from the edge of the receiving portion 210. The extension 220 may seal the receiving portion 210 when the electrode assembly and electrolyte are housed within it. The extension 220 may include a first extension 222. The extension 220 may include a second extension 224.

[0212] The first extension 222 may be provided on one side of the receiving portion 210 in the first direction. The second extension 224 may be provided on the other side of the receiving portion 210 in the first direction.

[0213] The first extension 222 may include a protruding portion B (e.g., a bat's ear) that protrudes further downward than the receiving portion 210. The second extension 224 may have a protruding portion B (e.g., a bat's ear) that protrudes further downward than the receiving portion 210.

[0214] Reference Figure 10 The receiving portion 210 may face the first bottom portion 1122 in the vertical direction, and the first extension 222 may face the second bottom portion 1124 in the vertical direction, the second bottom portion 1124 having an upper surface lower than the upper surface of the first bottom portion 1122. The second extension 224 may also face the third bottom portion 1126 in the vertical direction, the third bottom portion 1126 having an upper surface lower than the first bottom portion 1122. Figure 1 and Figure 3 The upper surface of the first extension 222 is lower than the lower surface of the second extension 224. Therefore, even when the first extension 222 and the second extension 224 have a protruding portion B, the protruding portion B will not be significantly bent or folded by the bottom 112.

[0215] The first terminal 230 and the second terminal 240 can be connected to an electrode assembly. For example, the first terminal 230 and the second terminal 240 can be electrode leads connected to the electrode assembly or electrode tabs constituting the electrodes of the electrode assembly. The first terminal 230 can protrude to one side in a first direction. The second terminal 240 can protrude to the other side in the first direction.

[0216] Specifically, the first terminal 230 and the second terminal 240 can protrude outward through the extension 220. For example, the first terminal 230 can protrude to one side in a first direction through the first extension 222, and the second terminal 240 can protrude to the other side in the first direction through the second extension 224.

[0217] The first terminal 230 can be disposed at one end of the internal space V of the housing 100 in a first direction. The second terminal 240 can be disposed at the other end of the internal space V of the housing 100 in the first direction.

[0218] Therefore, the first leakage sensor 300 can be positioned close to the first terminal 230 of the battery cell 200. As a result, the first leakage sensor 300 can be easily connected to electrical components (e.g., ICB interconnect circuit boards) located near the terminals of the battery cell 200. This facilitates the installation and maintenance of the first leakage sensor 300.

[0219] Similarly, the second leakage sensor 400 can be easily connected to electrical components (e.g., ICB) located near the terminals of the battery cell 200, thereby facilitating the installation and maintenance of the second leakage sensor 400.

[0220] [Leakage Sensor]

[0221] The first leakage sensor 300 can be disposed on the upper surface of the bottom 112. The first leakage sensor 300 can detect electrolyte leakage from one or more battery cells 200.

[0222] The first leakage sensor 300 can be positioned adjacent to the first notch 115. The first leakage sensor 300 can be positioned closer to the inner side of the main frame 110 than one end of the first notch 115 in a first direction. Figures 4 to 7 ).

[0223] Therefore, the first leakage sensor 300 is not only disposed on the upper surface of the bottom 112 of the housing 100 where the electrolyte accumulates, but is also disposed adjacent to the first notch 115 for discharging the electrolyte, so that the electrolyte leaking from the battery module 10 can be detected accurately and reliably, and accidents such as fires can be prevented in advance.

[0224] Furthermore, since the first leakage sensor 300 is located at one end of the bottom 112 in the first direction, the first leakage sensor 300 can be easily exposed to the outside. In particular, when the first end frame 120 can be separated from the main frame 110, the first leakage sensor 300 can be easily exposed to the outside by separating and removing the first end frame 120. Therefore, the installation and maintenance of the first leakage sensor 300 can be facilitated.

[0225] Furthermore, since the first leakage sensor 300 is located inside the main frame 110, rather than within one end of the first recess 115 in the first direction, the structure of the first leakage sensor 300 can be simplified, and the first leakage sensor 300 can be miniaturized and lightweight. For example, the first leakage sensor 300 may not have a structure surrounding the entire first recess 115.

[0226] The first leakage sensor 300 can be disposed at the second bottom portion 1124. Here, as described above, the first notch 115 can be disposed at one end of the second bottom portion 1124 in the first direction. Figures 4 to 7 ).

[0227] Therefore, the first leakage sensor 300 can not only be positioned at the second bottom portion 1124, where electrolyte can be easily collected due to its low position, but also adjacent to the first notch 115 for discharging electrolyte in the second bottom portion 1124. Thus, electrolyte leakage from the battery module 10 can be accurately and reliably detected, and accidents such as fires can be prevented in advance.

[0228] Additionally, as described above, the first bottom portion 1122 may face the receiving portion 210 of each of one or more battery cells 200 in the vertical direction, and the second bottom portion 1124 may face the first extension 222 of each of one or more battery cells 200 in the vertical direction. Figure 1 and Figure 10 ).

[0229] Therefore, the second bottom portion 1124, having a lower upper surface and a first notch 115, is positioned below the first extension 222, which surrounds and seals the first terminal 230, thus facilitating electrolyte leakage and allowing for easy collection and discharge of the electrolyte. Since the first leakage sensor 300 is located at the second bottom portion 1124 and adjacent to the first notch 115, electrolyte leakage from the battery module 10 can be detected quickly, accurately, and reliably, and accidents such as fires can be prevented in advance.

[0230] Furthermore, even when the first extension 222 is provided with a protruding portion B that, when unfolded, protrudes further downward in the vertical direction than the receiving portion 210 (e.g., a bat's ear), the upper surface of the second bottom portion 1124 is positioned lower than the upper surface of the first bottom portion 1122 that supports the receiving portion 210, so that the protruding portion B is not significantly bent or folded by the second bottom portion 1124. Therefore, the seal of the first extension 222 can be prevented from being released.

[0231] The first leakage sensor 300 may be positioned adjacent to the first disconnection portion E1. At least a portion of the first leakage sensor 300 may be positioned within the first opening section O1. Figure 6 and Figure 7 ).

[0232] Therefore, the first leakage sensor 300 can be positioned not only at a location where the electrolyte can be easily collected via the first dam 117, but also at or near a location through which the electrolyte passes when it is discharged to the outside. This allows for accurate and reliable detection of electrolyte leakage from the battery module 10, and can prevent accidents such as fires in advance.

[0233] The first leakage sensor 300 can be positioned adjacent to the first disconnection portion E1, and positioned further away from the first disconnection portion E1 on the other side in the first direction. At least a portion of the first leakage sensor 300 can be positioned at the first opening section O1 or the first section S1. Here, as described above, the first notch 115 can be positioned at one end of the bottom 112 in the first direction, and the other end of the first disconnection portion E1 in the first direction can be positioned at a point corresponding to the other end of the first notch 115, or can be positioned outside the other end of the first notch 115. Figure 6 and Figure 7 ).

[0234] Therefore, the first leakage sensor 300 can be positioned closer to the inside than the first dam 117 at one end of the bottom 112 in the first direction, where most of the electrolyte flowing towards one side of the housing 110 in the first direction accumulates. Additionally, the first leakage sensor 300 can be positioned at or near the portion through which the electrolyte passes when it is discharged to the outside. This allows for accurate and reliable detection of electrolyte leakage from the battery module 10, and can prevent accidents such as fires in advance.

[0235] Reference Figure 8 The first leakage sensor 300 may include a circuit board 310. The first leakage sensor 300 may include a conductor 320 forming a circuit.

[0236] Circuit board 310 may include an insulating film. Circuit board 310 may be flexible. Circuit board 310 may contain materials including PET, PI, or PEN. Circuit board 310 may be attached to bottom 112.

[0237] Conductor 320 can be a circuit pattern disposed on circuit board 210.

[0238] Conductor 320 can form a circuit. When the leaked electrolyte comes into contact with conductor 320, at least one of the circuit's resistance, current, and voltage can change. For example, normally a small current may flow through conductor 320 of the circuit, and when the leaked electrolyte comes into contact with conductor 320, the circuit's resistance can decrease. As another example, normally no current may flow through conductor 320, and when the leaked electrolyte comes into contact with conductor 320, current may flow through conductor 320.

[0239] Therefore, the first leak sensor 300 can be easily implemented at low cost using a simple configuration. Furthermore, electrolyte leaks can be detected in real time.

[0240] The circuit formed by conductor 320 can be connected to the ICB (interconnect circuit board, not shown). When the resistance of the circuit changes, the ICB can detect the change and send an electrical signal to the BMS (battery management system, not shown).

[0241] Here, ICB can refer to a circuit board equipped with at least one element that transmits information between the battery cell and the BMS. For example, ICB may be equipped with at least one element that transmits information (e.g., voltage information) sensed from the electrode leads of the battery cell 200 to the BMS.

[0242] Additionally, BMS can refer to a system that monitors the state of the battery cell 200 (such as temperature, voltage, and current) by estimating the SOC (state of charge) of the battery cell 200 based on the detected state of the battery cell 200, and controls charging or discharging, etc.

[0243] Conductor 320 may include one or more first pole conductors 322 and one or more second pole conductors 324. Conductor 320 may include a first terminal 326 and a second terminal 328.

[0244] One or more first conductors 322 and one or more second conductors 324 may extend along a predetermined direction (e.g., a second direction) and be arranged alternately side by side. Here, one or more first conductors 322 and one or more second conductors 324 may be spaced apart from each other by a predetermined distance. One or more first conductors 322 and one or more second conductors 324 may constitute a circuit. When the leaked electrolyte simultaneously contacts at least one of the first conductors 322 and at least one of the second conductors 324, such that at least one of the first conductors 322 and at least one of the second conductors 324 is electrically connected via the leaked electrolyte, at least one of the circuit's resistance, current, and voltage may change.

[0245] Therefore, the first leakage sensor 300 can be easily implemented at low cost using a simple configuration.

[0246] In addition, since the leakage detection area or leakage detection width of the first leakage sensor 300 can be increased, or the distance between the first electrode conductor 322 and the second electrode conductor 324 can be reduced, the performance or sensitivity of the first leakage sensor 300 can be improved.

[0247] One or more first electrode conductors 322 may be connected to each other, and one or more second electrode conductors 324 may be connected to each other. Figure 8 ).

[0248] Therefore, the first leakage sensor 300 can be easily implemented at low cost using a simple configuration.

[0249] When the first leakage sensor 300 is positioned adjacent to the first disconnected portion E1 of the first dam 117 and at least a portion thereof is disposed in the first opening section O1, the predetermined directions in which the first polar conductor 322 and the second polar conductor 324 extend may be parallel to the overall extension direction of the first dam 117 (e.g., the second direction).

[0250] Therefore, the first conductor 322 and the second conductor 324 of the first leakage sensor 300 can effectively block the portion of the first dam 117 that is disconnected and open. As a result, leakage of electrolyte from the battery module 10 can be detected accurately and reliably, and the first leakage sensor 300 can be easily implemented at low cost using a simple configuration, and the first leakage sensor 300 can also be miniaturized.

[0251] In addition, since the distance between the first electrode conductor 322 and the second electrode conductor 324 can be reduced, the performance or sensitivity of the first leakage sensor 300 can be improved.

[0252] The first terminal 326 and the second terminal 328 can form a circuit. The first terminal 326 and the second terminal 328 can be connected to an external object (e.g., an external power supply or external wiring). The first terminal 326 can be connected to one or more first conductors 322, and the second terminal 328 can be connected to one or more second conductors 324.

[0253] The first extreme part 326 and the second extreme part 328 can be located outside the first opening section O1.

[0254] The second leakage sensor 400 can be disposed on the upper surface of the bottom 112. Figure 3 The second leakage sensor 400 can detect electrolyte leakage from one or more battery cells 200.

[0255] The second leakage sensor 400 may be positioned adjacent to the second notch 116. The second leakage sensor 400 may be positioned closer to the inside of the main frame 110 than the other end of the second notch 116 in the first direction.

[0256] Furthermore, since a first recess 115 and a second recess 116 are formed at both ends of the bottom 112 of the housing 100 in the first direction, and the first leakage sensor 300 and the second leakage sensor 400 are respectively disposed adjacent to the first recess 115 and the second recess 116 on the upper surface of the bottom 112, leakage of electrolyte from the battery module 10 can be accurately and reliably detected, and accidents such as fires can be prevented in advance.

[0257] Furthermore, since the first leakage sensor 300 and the second leakage sensor 400 can be exposed to the outside, their installation and maintenance are facilitated. For example, when the first end frame 120 and the second end frame 130 are separated and removed from the main frame 110, the first leakage sensor 300 and the second leakage sensor 400 can be easily exposed to the outside.

[0258] Furthermore, since the first leakage sensor 300 and the second leakage sensor 400 are located inside the main frame 110, rather than at one end of the first recess 115 and the second recess 116 in the first direction, the structure of the first leakage sensor 300 and the second leakage sensor 400 can be simplified, and they can also be miniaturized and lightweight. For example, the first leakage sensor 300 and the second leakage sensor 400 do not necessarily need to have a structure that surrounds the entire first recess 115 and the second recess 116 respectively.

[0259] Matters not mentioned by the second leakage sensor 400 can be inferred from the first leakage sensor 300.

[0260] [Second Embodiment of a Battery Module Capable of Detecting Electrolyte Leakage]

[0261] Hereinafter, the battery module 10 capable of detecting electrolyte leakage according to the second embodiment will be described with focus on the differences from the battery module 10 capable of detecting electrolyte leakage according to the first embodiment.

[0262] Reference Figure 11 and Figure 12 The battery module 10 capable of detecting electrolyte leakage according to the second embodiment may further include a first busbar (not shown) and a first busbar frame 510. The battery module 10 capable of detecting electrolyte leakage according to the second embodiment may further include a second busbar (not shown) and a second busbar frame (not shown). The battery module 10 capable of detecting electrolyte leakage according to the second embodiment may further include a first inner cover 610 and a second inner cover (not shown).

[0263] A first busbar (not shown) may be disposed at one end of the interior space V of the housing 100 in a first direction. The first busbar may be electrically connected to the first terminal 230 of each of one or more battery cells 200.

[0264] A second busbar (not shown) may be disposed at the other end of the internal space V of the housing 100 in the first direction. The second busbar may be electrically connected to the second terminal 240 of each of one or more battery cells 200.

[0265] The first busbar frame 510 can be positioned above the first leakage sensor 300. The first busbar frame 510 can support the first busbar.

[0266] Therefore, electrolyte leaking from one end of the battery cell 200 in the first direction and flowing along the surface of the first busbar frame 510 can easily accumulate at the bottom 112 and pass through the first leak sensor 300. Thus, electrolyte leakage from the battery module 10 can be detected accurately and reliably, and accidents such as fires can be prevented in advance.

[0267] The lower end portion of the first busbar frame 510 can be located on the other side of the first leakage sensor 300 in the first direction.

[0268] Therefore, since the first notch 115 is located at one end of the bottom 112, and the first leakage sensor 300 is positioned adjacent to the first notch 115, the first busbar frame 510 can extend downwards even though the first leakage sensor 300 is located at the bottom 112. When the first busbar frame 510 extends downwards, it can be stably supported by contacting the bottom 112 and being inserted between the battery cell 200 and the bottom 112, thereby improving insulation performance. In other words, not only can electrolyte leakage of the battery cell 200 be detected accurately and reliably, but the structural stability and insulation performance of the battery module 10 can also be improved.

[0269] The second busbar frame can be disposed above the second leakage sensor 400. The second busbar frame can support the second busbar. The lower end portion of the second busbar frame can be disposed closer to the inside of the second leakage sensor 400 in a first direction.

[0270] The first inner cover 610 may be positioned closer to the inside than the first end plate 120, and adjacent to and parallel to the first end plate 120. The first end plate 120 may be made of an insulating material.

[0271] The second inner cover (not shown) may be positioned closer to the inside than the second end plate 130 and adjacent to and parallel to the second end plate 130. The second end plate 130 may be made of an insulating material.

[0272] Leaked electrolyte can flow along the surface of the first busbar frame 510, the second busbar frame, and the first inner cover 610 or the second inner cover, and can accumulate at the bottom 112.

[0273] Matters not mentioned in the battery module 10 capable of detecting electrolyte leakage according to the second embodiment can be inferred from the battery module 10 capable of detecting electrolyte leakage according to the first embodiment.

[0274] It should be understood that the described embodiments are illustrative in all respects and not restrictive, and the scope of the invention will be indicated by the appended claims rather than the detailed description described. Furthermore, the meaning and scope of the described claims, as well as all variations and modifications derived from equivalent concepts, should be interpreted as being included within the scope of the invention.

[0275] Although the invention has been described with reference to exemplary accompanying drawings, it should be understood that the invention is not limited to the embodiments and drawings disclosed in this specification, and those skilled in the art will understand that various modifications are possible without departing from the scope and concept of the invention. Furthermore, although the operational effects of the configuration according to the invention are not explicitly described in the description of embodiments of the invention, it should be understood that predictable effects can be recognized through this configuration.

Claims

1. A battery module capable of detecting electrolyte leakage, the battery module comprising: A housing (100) includes: a main frame (110); and a first end frame (120) and a second end frame (130), the first end frame and the second end frame respectively covering the two ends of the main frame (110) in a first direction intersecting the vertical direction, the main frame (110) including a bottom (112) and a pair of sidewalls (113) and (114), the bottom extending along the first direction and the second direction, the second direction intersecting the vertical direction and the first direction, the pair of sidewalls (113) and (114) respectively connected to the two ends of the bottom (112) in the second direction and extending along the vertical direction and the first direction; One or more battery cells (200) arranged in an internal space (V) of the housing (100) defined by the main frame (110), the first end frame (120), and the second end frame (130); and A first leakage sensor (300) is disposed on the upper surface of the bottom (112) and detects electrolyte leakage from one or more battery cells (200). The main frame (110) further includes a first notch (115), which is located at one end of the bottom (112) in the first direction and is recessed inward. The first notch (115) connects the upper and lower parts of the bottom (112) to discharge leaked electrolyte outside the housing (100). The first leakage sensor (300) is positioned adjacent to the first notch (115) and is positioned closer to the inside of the main frame (110) than one end of the first notch (115) in the first direction.

2. The battery module according to claim 1, wherein, The one or more battery cells (200) are arranged side by side in the second direction and each extends along the vertical direction and the first direction. Each of the one or more battery cells (200) includes a first terminal (230) that protrudes to one side of the first direction and is located at one end of the internal space (V) in the first direction.

3. The battery module according to claim 1 or 2, wherein, The bottom (112) includes: a first bottom portion (1122) corresponding to the central portion of the bottom (112) in the first direction; and a second bottom portion (1124) located on a side closer to the first direction than the first bottom portion (1122) and having an upper surface lower than the upper surface of the first bottom portion (1122). The first notch (115) is provided at one end of the second bottom portion (1124) in the first direction, and The first leakage sensor (300) is disposed at the second bottom portion (1124).

4. The battery module according to claim 3, wherein, Each of the one or more battery cells (200) includes: a receiving portion (210) that accommodates an electrode assembly and an electrolyte and extends along the vertical direction and the first direction; an extension portion (220) that extends outward from an edge of the receiving portion (210) and seals the electrode assembly and the electrolyte accommodated in the receiving portion (210); and a first terminal (230) and a second terminal (240) that are connected to the electrode assembly and protrude outward through the extension portion (220). The extension (220) includes a first extension (222) disposed on the side closer to the first direction than the receiving portion (210). The first terminal (230) protrudes to one side in the first direction through the first extension (222). The one or more battery cells (200) are arranged side by side in the second direction. The first bottom portion (1122) faces the receiving portion (210) of one or more of the one or more battery cells (200) in the vertical direction, and The second bottom portion (1124) faces the first extension (222) of one or more of the one or more battery cells (200) in the vertical direction.

5. The battery module according to any one of claims 1 to 4, wherein, The main frame (110) also includes a first dam (117) that protrudes upward from the upper surface of one side end of the bottom (112) in the first direction, and the first dam (117) extends along the second direction or extends obliquely in the first direction toward the second direction but cannot or does not extend in the first opening section (O1) in the second direction. The first dam (117) includes a first disconnected portion (E1) that defines the first opening section (O1). At least a portion of the leaked electrolyte flows into the first notch (115) through the region adjacent to the first disconnected portion (E1) and corresponding to the first opening section (O1), and The first leakage sensor (300) is positioned adjacent to the first disconnection portion (E1), and at least a portion of the first leakage sensor is disposed in the first opening section (O1).

6. The battery module according to claim 5, wherein, The first dam (117) is disposed at one end of the bottom (112) in the first direction, such that the first opening section (O1) at least partially overlaps with the first section (S1) in the second direction having the first notch (115), and the first break portion (E1) at least partially overlaps with the first notch (115) in the first direction. In the first direction, the other end of the first disconnected portion (E1) is located at a point corresponding to the other end of the first notch (115) in the first direction, or is located closer to the other side of the first direction than the other end of the first notch (115) in the first direction. The first leakage sensor (300) is positioned adjacent to the first disconnection portion (E1) and positioned closer to the other side in the first direction than the first disconnection portion (E1), and at least a portion of the first leakage sensor (300) is positioned at the first opening section (O1) or the first section (S1).

7. The battery module according to any one of claims 1 to 6, wherein, The first end frame (120) covers at least partially the first notch (115) from above.

8. The battery module according to any one of claims 1 to 7, wherein, The first leakage sensor (300) includes a conductor (320) forming a circuit, and When the leaked electrolyte comes into contact with the conductor (320), at least one of the circuit’s resistance, current and voltage changes.

9. The battery module according to claim 8, wherein, The conductor (320) includes one or more first pole conductors (322) and one or more second pole conductors (324), the one or more first pole conductors and the one or more second pole conductors extending in a predetermined direction, arranged alternately side by side, and spaced apart from each other by a predetermined distance. The one or more first conductors (322) and the one or more second conductors (324) form the circuit, and When the leaked electrolyte comes into contact with both the first electrode conductor (322) and the second electrode conductor (324) simultaneously, such that the first electrode conductor (322) and the second electrode conductor (324) are electrically connected via the leaked electrolyte, at least one of the resistance, the current and the voltage of the circuit changes.

10. The battery module according to claim 9, wherein, The one or more first electrode conductors (322) are connected to each other, and The one or more second conductors (324) are connected to each other.

11. The battery module according to claim 9 or 10, wherein, The main frame (110) also includes a first dam (117) that protrudes upward from the upper surface of one side end of the bottom (112) in the first direction, and the first dam (117) extends along the second direction or extends obliquely in the first direction toward the second direction but cannot or does not extend in the first opening section (O1) in the second direction. The first dam (117) includes a first disconnected portion (E1) that defines the first opening section (O1). At least a portion of the leaked electrolyte flows into the first notch (115) through the region adjacent to the first disconnected portion (E1) and corresponding to the first opening section (O1). The first leakage sensor (300) is positioned adjacent to the first disconnection portion (E1), and at least a portion of the first leakage sensor (300) is disposed within the first opening section (O1). The predetermined direction is parallel to the overall extension direction of the first dam (117).

12. The battery module according to claim 2, further comprising: A first busbar is disposed at one end of the inner space (V) in the first direction and is electrically connected to the first terminal (230) of each of the one or more battery cells (200). as well as A first busbar frame (510) is disposed above the first leakage sensor (300) and supports the first busbar.

13. The battery module according to claim 12, wherein, The lower end portion of the first busbar frame (510) is located on the other side of the first leakage sensor (300) in the first direction.

14. The battery module according to any one of claims 1 to 13, wherein the battery module further comprises: A second leakage sensor (400) is disposed on the upper surface of the bottom (112) and detects electrolyte leakage from one or more battery cells (200). The main frame (110) further includes a second recess (116), which is located at the other end of the bottom (112) in the first direction and is recessed inward. The second recess (116) connects the upper and lower parts of the bottom (112) to discharge leaked electrolyte outside the housing (100). The second leakage sensor (400) is positioned adjacent to the second notch (116) and is positioned closer to the inside of the main frame (110) than the other end of the second notch (116) in the first direction.

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