Battery cell capable of detecting electrolyte leakage

Abstract

The present invention provides a battery cell 10 capable of detecting electrolyte leakage, comprising: a case 100 including an electrode assembly, an electrolyte, a housing portion 110 for housing the electrode assembly and the electrolyte, and a sealing portion 120 formed on the edge for sealing the electrode assembly and the electrolyte housed in the housing portion 110; and a leak sensor 200 coupled to the sealing portion 120 for detecting the electrolyte leaking from the case 100. The leak sensor 200 may include a conductor 220 that is formed to constitute an electrical circuit, although at least a portion of it is formed adjacent to the frame of the sealing portion 120, and extends along the frame of the sealing portion 120. When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change. Therefore, a battery cell capable of detecting electrolyte leakage can be easily realized at low cost with a simple configuration, enabling rapid and accurate detection of electrolyte leakage in real time, preventing accidents such as fires, and potentially eliminating the need for additional space to install the leak sensor.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0042049 filed on March 30, 2023, and the contents disclosed in the documents of the Korean patent application are all included as part of this specification.

[0002] The present invention relates to a battery cell capable of detecting leakage of an electrolytic solution, which can be easily implemented at low cost with a simple configuration, quickly and accurately detect leakage of the electrolytic solution in real time, prevent accidents such as fires, and does not require additional space for installing a leakage sensor.

Background Art

[0003] Secondary batteries can be classified into cylindrical batteries, prismatic batteries, pouch-type battery cells, etc. Among them, pouch-type battery cells that can be stacked with high integration, have a high energy density per unit weight, are inexpensive, and are easy to deform have attracted high attention.

[0004] In a pouch-type battery cell, a sealing part is formed along the pouch frame, and an electrode laminate is installed through an inner accommodation space. And electrode tabs (electrode leads) protrude outside the pouch, and these electrode tabs are electrically connected to the electrode laminate. The pouch functions to insulate the electrode laminate from the outside.

[0005] The inner accommodation space of the pouch in which the electrode laminate is installed is filled with an electrolytic solution. If the electrolytic solution filled inside the pouch leaks, problems such as poor insulation may occur, and a fire or the like may occur. Also, if the electrolytic solution leaks from a secondary battery for a vehicle, serious errors may occur in the vehicle control system due to a voltage drop.

[0006] Therefore, there is a need for a battery cell capable of detecting leakage of an electrolytic solution that can quickly and accurately detect leakage of the electrolytic solution in real time and prevent accidents such as fires.

Prior Art Documents

[0007] [Patent Document 1] Korean Registered Patent No. 10-2173066 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The present invention was devised to solve the above-mentioned problems, and aims to provide a battery cell capable of detecting electrolyte leakage that can be easily implemented at low cost with a simple configuration.

[0009] The present invention aims to provide a battery cell capable of detecting electrolyte leakage in real time.

[0010] The present invention aims to provide a battery cell capable of detecting electrolyte leakage, which can quickly, accurately, reliably, and effectively detect electrolyte leakage and prevent accidents such as fires.

[0011] The present invention aims to provide a battery cell capable of detecting electrolyte leakage that does not require additional space for installing a leak sensor.

[0012] The present invention aims to provide a battery cell capable of detecting electrolyte leakage, which may have improved performance or sensitivity.

[0013] The present invention aims to provide a battery cell capable of detecting electrolyte leakage, which can prevent short circuits from occurring in electrical circuits and prevent damage to connecting components with external objects.

[0014] The present invention aims to provide a battery cell that can easily and stably connect to an external object (e.g., an external power source) and maintain that connection, and that can detect electrolyte leakage.

[0015] The present invention aims to provide a battery cell that is lighter, easier to install, and capable of detecting electrolyte leakage.

[0016] The technical problems of the present invention are not limited to the objectives mentioned above. Other objectives and advantages of the present invention not mentioned can be understood from the following description and more clearly from the embodiments of the present invention. Furthermore, it is readily apparent that the objectives and advantages of the present invention can be achieved by the means and combinations thereof described in the claims. [Means for solving the problem]

[0017] To solve the above-mentioned problems, the present invention provides a battery cell capable of detecting electrolyte leakage, comprising an electrode assembly, an electrolyte, a case 100, and a leak sensor 200.

[0018] The case 100 may include a housing section 110 and a sealing section 120.

[0019] The housing section 110 can accommodate the electrode assembly and the electrolyte.

[0020] The sealing portion 120 is formed on the edge and can seal the electrode assembly and electrolyte housed in the housing portion 110.

[0021] The leak sensor 200 may be installed by being coupled to the sealing portion 120.

[0022] The leak sensor 200 can detect the electrolyte leaking from the case 100.

[0023] The leak sensor 200 may include a conductor 220.

[0024] The conductor 220 may be formed so that at least a portion of it is adjacent to the frame of the sealing portion 120.

[0025] The conductor 220 may be formed to extend along the frame of the sealing part 120.

[0026] The conductor 220 can form an electric circuit.

[0027] When the leaking electrolytic solution comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electric circuit may change.

[0028] In one embodiment, the conductor 220 may include a first conductor (C1) and a second conductor (C2).

[0029] The first conductor (C1) may be formed adjacent to the frame of the sealing part 120.

[0030] The first conductor (C1) may be formed to extend along the frame of the sealing part 120.

[0031] The second conductor (C2) may be formed inside the sealing part 120 closer to the center than the first conductor (C1).

[0032] The second conductor (C2) may be formed to extend side by side with the first conductor (C1) at a predetermined interval from the first conductor ( C1).

[0033] The first conductor (C1) and the second conductor (C2) can form the electric circuit.

[0034] When the leaking electrolytic solution comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and thereby the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolytic solution, at least one of the resistance, current, and voltage of the electric circuit may change.

[0035] In one embodiment, the conductor 220 may further include a third conductor (C3).

[0036] The third conductor (C3) may be formed further inside the sealing portion 120 than the second conductor (C2).

[0037] The third conductor (C3) may be formed extending alongside the second conductor (C2) at a predetermined distance from it.

[0038] The aforementioned third conductor (C3) can constitute the electrical circuit.

[0039] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2), or the second conductor (C2) and the third conductor (C3), are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0040] In one embodiment, the first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other.

[0041] In one embodiment, the conductor 220 may further include a fourth conductor (C4).

[0042] The fourth conductor (C4) may be formed further inside the sealing portion 120 than the third conductor (C3).

[0043] The fourth conductor (C4) may be formed extending alongside the third conductor (C3) at a predetermined distance from it.

[0044] The aforementioned fourth conductor (C4) can constitute the electrical circuit.

[0045] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, or with the third conductor (C3) and the fourth conductor (C4) simultaneously, and as a result the first conductor (C1) and the second conductor (C2), the second conductor (C2) and the third conductor (C3), or the third conductor (C3) and the fourth conductor (C4) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0046] In one embodiment, the first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other.

[0047] The second conductor (C2) and the fourth conductor (C4) may be formed by connecting them to each other.

[0048] In one embodiment, the housing portion 110 may extend in the vertical direction and in a first direction intersecting the vertical direction.

[0049] The sealing portion 120 may include the first sealing portion 122.

[0050] The first sealing portion 122 may be formed on one side of the housing portion 110 in the first direction.

[0051] The first sealing portion 122 may extend in the vertical direction.

[0052] The first sealing portion 122 may have a predetermined width in the first direction.

[0053] The leak sensor 200 may be installed by being coupled to the first sealing portion 122.

[0054] The conductor 220 may include a one-sided conductor portion 222.

[0055] The one-sided conductor portion 222 may be formed adjacent to the one-sided frame in the first direction of the first sealing portion 122.

[0056] The one-sided conductor portion 222 may be formed extending vertically along the one-sided frame in the first direction of the first sealing portion 122, or it may be formed extending diagonally in a direction perpendicular to the vertical direction toward the vertical direction.

[0057] The one-sided conductor portion 222 can constitute the electrical circuit.

[0058] When the leaking electrolyte comes into contact with the one-sided conductor portion 222, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0059] In one embodiment, the conductor 220 may further include a lower conductor portion 224.

[0060] The lower conductor portion 224 may be formed adjacent to the lower frame of the first sealing portion 122.

[0061] The lower conductor portion 224 may be formed extending in a first direction along the lower frame of the first sealing portion 122, or it may be formed extending at an oblique angle perpendicular to the first direction toward the first direction.

[0062] The lower conductor portion 224 can constitute the electrical circuit.

[0063] When the leaking electrolyte comes into contact with the lower conductor portion 224, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0064] In one embodiment, the lower conductor portion 224 may extend to a position corresponding to the other end of the first sealing portion 122 in the first direction.

[0065] In one embodiment, the one-sided conductor portion 222 and the lower conductor portion 224 may be formed connected to each other.

[0066] In one embodiment, the conductor 220 may include the other conductor portion 226.

[0067] The other-side conductor portion 226 may be formed on the other side of the one-side conductor portion 222 in the first direction.

[0068] The other conductor portion 226 may be formed extending in the vertical direction, or it may be formed extending in a direction perpendicular to the vertical direction and inclined diagonally.

[0069] The other conductor portion 226 can constitute the electrical circuit.

[0070] When the leaking electrolyte comes into contact with the other conductor portion 226, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0071] In one embodiment, the one-sided conductor portion 222 and the other-sided conductor portion 226 may be formed in connection with the lower conductor portion 224.

[0072] In one embodiment, the conductor 220 may further include a terminal portion 228.

[0073] The terminal portion 228 may be connected to an external object that constitutes the electrical circuit.

[0074] The terminal portion 228 may be connected to the one-sided conductor portion 222.

[0075] The terminal portion 228 may be formed on the upper side of the liquid leak sensor 200.

[0076] In one embodiment, the terminal portion 228 may be formed above the one-sided conductor portion 222.

[0077] In one embodiment, the battery cell capable of detecting electrolyte leakage may further include a first electrode lead 310.

[0078] The first electrode lead 310 may be housed in the housing portion 110.

[0079] The first electrode lead 310 may be positioned on one side in the first direction of the electrode assembly that extends in the first direction.

[0080] The first electrode lead 310 may be connected to the electrode assembly.

[0081] The sealing portion 120 may include the first sealing portion 122.

[0082] The first sealing portion 122 may be formed on one side of the electrode assembly and the housing portion 110 in the first direction.

[0083] The first sealing portion 122 can surround the first electrode lead 310.

[0084] The leak sensor 200 may be installed by being coupled to the first sealing portion 122.

[0085] The conductor 220 may include a one-sided conductor portion 222.

[0086] The one-sided conductor portion 222 may be formed adjacent to the one-sided frame in the first direction of the first sealing portion 122.

[0087] The one-sided conductor portion 222 may be formed extending along the one-sided frame in the first direction of the first sealing portion 122.

[0088] The one-sided conductor portion 222 can constitute the electrical circuit.

[0089] When the leaking electrolyte comes into contact with the one-sided conductor portion 222, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0090] In one embodiment, the leak sensor 200 may further include a flexible circuit board 210.

[0091] The flexible circuit board 210 may be installed by being coupled to the sealing portion 120.

[0092] The conductor 220 may be a circuit pattern formed on the flexible circuit board 210.

[0093] In one embodiment, the system may be equipped with a first leak sensor 200A and a second leak sensor 200B, which are the leak sensors 200, respectively.

[0094] The first leak sensor 200A may be installed by being coupled to one side of the first sealing portion 122 in the vertical direction and in a second direction intersecting the first direction.

[0095] The second leak sensor 200B may be installed by being coupled to the other side of the first sealing portion 122 in the second direction.

[0096] Furthermore, in order to solve the above-mentioned problems, the present invention provides a battery cell that can detect electrolyte leakage, comprising an electrode assembly, an electrolyte, a case 100, and a leak sensor 200.

[0097] The case 100 can house and seal the electrode assembly and electrolyte.

[0098] The leak sensor 200 may be installed coupled to the case 100.

[0099] The leak sensor 200 can detect the electrolyte leaking from the case 100.

[0100] The case 100 may extend in the vertical direction and in a first direction intersecting the vertical direction.

[0101] The leak sensor 200 may include a conductor 220.

[0102] The conductor 220 may be formed extending in the vertical direction, or it may be formed extending in the vertical direction with an oblique inclination perpendicular to the vertical direction.

[0103] The conductor 220 can constitute an electrical circuit.

[0104] When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0105] In one embodiment, the conductor 220 may include a first conductor (C1) and a second conductor (C2).

[0106] The first conductor (C1) may be formed extending in the vertical direction, or it may be formed extending in the vertical direction with an oblique inclination perpendicular to the vertical direction.

[0107] The second conductor (C2) may be formed extending alongside the first conductor (C1) at a predetermined distance from the first conductor (C1).

[0108] The first conductor (C1) and the second conductor (C2) can constitute the electrical circuit.

[0109] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0110] In one embodiment, the system may be equipped with a first leak sensor 200A and a second leak sensor 200B, which are the leak sensors 200, respectively.

[0111] The first leak sensor 200A may be installed by being coupled to one side of the case 100 in the vertical direction and in a second direction intersecting the first direction.

[0112] The second leak sensor 200B may be installed by being coupled to the other side of the case 100 in the second direction.

[0113] Furthermore, in order to solve the above-mentioned problems, the present invention provides a battery module 1 that includes a plurality of battery cells capable of detecting electrolyte leakage, and an ICB (Internal Connection Board) module 20 that is electrically connected to the conductor 220 of the leakage sensor 200 of each of the battery cells capable of detecting electrolyte leakage. [Effects of the Invention]

[0114] According to an embodiment of the present invention, a battery cell 10 capable of detecting electrolyte leakage may include a case 100 comprising an electrode assembly, an electrolyte, a housing portion 110 for housing the electrode assembly and the electrolyte, and a sealing portion 120 formed on the edge for sealing the electrode assembly and the electrolyte housed in the housing portion 110, and a leak sensor 200 coupled to the sealing portion 120 for detecting the electrolyte leaking from the case 100. The leak sensor 200 may include a conductor 220 that is formed to constitute an electrical circuit, although at least a portion of it is formed adjacent to the frame of the sealing portion 120, and extends along the frame of the sealing portion 120. When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0115] This allows for the easy and low-cost implementation of a leak sensor 200 with a simple configuration. Furthermore, it enables real-time detection of electrolyte leaks.

[0116] Furthermore, the electrolyte leaks mainly through the frame of the sealing portion 120, and although the conductor 220 of the leak sensor 200 is formed adjacent to the frame of these sealing portions 120, it extends along the frame of these sealing portions 120. Therefore, the leak sensor 200 can quickly and accurately detect electrolyte leakage. This helps to prevent accidents such as fires.

[0117] Furthermore, since the leak sensor 200 is coupled to and installed in the sealing section 120, which is narrower than the housing section 110 and has remaining empty space around it, additional space for installing the leak sensor 200 may not be necessary.

[0118] According to an embodiment of the present invention, the conductor 220 may include a first conductor (C1) formed adjacent to the frame of the sealing portion 120 but extending along the frame of the sealing portion 120, and a second conductor (C2) formed further inside the sealing portion 120 than the first conductor (C1), but extending alongside the first conductor (C1) at a predetermined distance apart. The first conductor (C1) and the second conductor (C2) can constitute the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0119] This makes it possible to easily realize a leak sensor 200 at low cost with a simple configuration.

[0120] According to an embodiment of the present invention, the conductor 220 may further include a third conductor (C3) which is formed inside the sealing portion 120, but is separated from the second conductor (C2) by a predetermined distance and extends alongside the second conductor (C2), thereby constituting the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2), or the second conductor (C2) and the third conductor (C3), are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0121] This can increase the leakage detection area or leakage detection width of the leakage sensor 200, or decrease the separation distance between the first conductor (C1) and the second conductor (C2), or between the second conductor (C2) and the third conductor (C3), thereby potentially improving the performance or sensitivity of the leakage sensor 200.

[0122] According to embodiments of the present invention, the first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other.

[0123] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect both the electrolyte flowing through the first conductor (C1) and the second conductor (C2), and the electrolyte flowing through the second conductor (C2) and the third conductor (C3), using a simple configuration.

[0124] According to an embodiment of the present invention, the conductor 220 may further include a fourth conductor (C4) which is formed inside the sealing portion 120, but is separated from the third conductor (C3) by a predetermined distance and extends alongside the third conductor (C3), thereby constituting the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, or with the third conductor (C3) and the fourth conductor (C4) simultaneously, and as a result the first conductor (C1) and the second conductor (C2), the second conductor (C2) and the third conductor (C3), or the third conductor (C3) and the fourth conductor (C4) are electrically connected by the leaking electrolyte, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0125] This can increase the leak detection area or leak detection width of the leak sensor 200, or decrease the separation distance between the first conductor (C1) and the second conductor (C2), the second conductor (C2) and the third conductor (C3), or the third conductor (C3) and the fourth conductor (C4), thereby potentially improving the performance or sensitivity of the leak sensor 200.

[0126] According to embodiments of the present invention, the first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other. The second conductor (C2) and the fourth conductor (C4) may also be formed by connecting them to each other.

[0127] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect electrolyte flowing through the first conductor (C1) and the second conductor (C2), the electrolyte flowing through the second conductor (C2) and the third conductor (C3), and the electrolyte flowing through the third conductor (C3) and the fourth conductor (C4) with a simple configuration.

[0128] According to embodiments of the present invention, the housing portion 110 may extend in the vertical direction and in a first direction intersecting the vertical direction. The sealing portion 120 may be formed on one side of the housing portion 110 in the first direction, extend in the vertical direction, and include a first sealing portion 122 having a predetermined width in the first direction. The leak sensor 200 may be installed coupled to the first sealing portion 122. The conductor 220 is formed adjacent to one side frame of the first sealing portion 122 in the first direction, but may be formed extending vertically along one side frame of the first sealing portion 122 in the first direction, or formed extending diagonally inclined in a direction perpendicular to the vertical direction toward the vertical direction, and may include a one-side conductor portion 222 that constitutes the electrical circuit. When the leaking electrolyte comes into contact with the one-side conductor portion 222, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0129] As a result, although the electrolyte leaks through the first side frame of the first sealing portion 122, the probability of the downward-flowing electrolyte coming into contact with the conductor 220 of the leak sensor 200 may increase, and the time and / or number of times the electrolyte comes into contact with the conductor 220 of the leak sensor 200 may increase. Therefore, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably.

[0130] According to an embodiment of the present invention, the conductor 220 is formed adjacent to the lower frame of the first sealing portion 122, but may be formed extending in a first direction along the lower frame of the first sealing portion 122, or extending at an angle toward the first direction and perpendicular to the first direction, and may further include a lower conductor portion 224 that constitutes the electrical circuit. When the leaking electrolyte comes into contact with the lower conductor portion 224, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0131] This increases the probability that electrolyte leaking through the frame of the first sealing portion 122 and flowing downwards, or adhering to or accumulating on the downward side, will come into contact with the conductor 220 of the leak sensor 200, and the time and / or number of times it comes into contact with the conductor 220 of the leak sensor 200 may increase. Thus, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably.

[0132] According to an embodiment of the present invention, the lower conductor portion 224 may extend to a position corresponding to the other end of the first sealing portion 122 in the first direction.

[0133] This allows the leakage detection area of ​​the leakage sensor 200 to be increased, which may improve the performance or sensitivity of the leakage sensor 200.

[0134] According to an embodiment of the present invention, the one-sided conductor portion 222 and the lower conductor portion 224 may be formed connected to each other.

[0135] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect both the electrolyte passing through the one-sided conductor portion 222 and the electrolyte passing through the lower conductor portion 224, using a simple configuration.

[0136] According to an embodiment of the present invention, the conductor 220 is formed on the other side of the one-side conductor portion 222 in the first direction, but may be formed extending in the vertical direction, or extending in a direction perpendicular to the vertical direction toward the vertical direction, and may include the other-side conductor portion 226 that constitutes the electrical circuit. When the leaking electrolyte comes into contact with the other-side conductor portion 226, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0137] As a result, electrolyte that adheres to or flows to the other side of the first sealing portion 122 in the first direction can also come into contact with the conductor 220 of the leak sensor 200. Therefore, the leak sensor 200 can quickly, accurately, and reliably detect electrolyte leakage.

[0138] According to an embodiment of the present invention, the one-sided conductor portion 222 and the other-sided conductor portion 226 may be formed in connection with the lower conductor portion 224.

[0139] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect the electrolyte passing through the one-sided conductor portion 222, the electrolyte passing through the lower-sided conductor portion 224, and the electrolyte passing through the other-sided conductor portion 226, using a simple configuration.

[0140] Furthermore, the vertical lengths of the one-sided conductor portion 222 and the other-sided conductor portion 226 may be increased, and the first-direction length of the lower conductor portion 224 may be increased. Therefore, the probability of electrolyte leaking through the frame of the first sealing portion 122 or flowing downwards coming into contact with the conductor 220 of the leak sensor 200 may increase, and the time and / or number of times it comes into contact with the conductor 220 of the leak sensor 200 may increase. Thus, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably.

[0141] According to embodiments of the present invention, the conductor 220 may further include a terminal portion 228 that is connected to an external object constituting the electrical circuit and connected to the one-sided conductor portion 222. The terminal portion 228 may be formed on the upper side of the liquid leak sensor 200.

[0142] As a result, the terminal portion 228 of the conductor 220 connected to an external object (e.g., an external power supply) may not come into contact with the electrolyte that leaks and flows downward, or adheres to or accumulates on the downward side. Therefore, it is possible to prevent short circuits from occurring in the electrical circuit and to prevent damage to the connecting components between the conductor 220 and the external object.

[0143] According to an embodiment of the present invention, the terminal portion 228 may be formed above the one-sided conductor portion 222.

[0144] This allows the terminal portion 228 to be connected to an external object (e.g., an external power supply) and the connection to be maintained without interference from the one-sided conductor portion 222. Therefore, the leak sensor 200 and an external object (e.g., an external power supply) can be easily and stably connected and the connection can be maintained.

[0145] According to embodiments of the present invention, the present invention may further include a first electrode lead 310 housed in the housing portion 110 and positioned on one side in the first direction of the electrode assembly extending in a first direction, and connected to the electrode assembly. The sealing portion 120 may include a first sealing portion 122 formed on one side in the first direction of the electrode assembly and the housing portion 110, and surrounding the first electrode lead 310. The leak sensor 200 may be installed coupled to the first sealing portion 122. The conductor 220 is formed adjacent to one side frame in the first direction of the first sealing portion 122, but may include a one-side conductor portion 222 that extends along one side frame in the first direction of the first sealing portion 122 and constitutes the electrical circuit. When the leaking electrolyte comes into contact with the one-side conductor portion 222, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0146] As a result, the one-sided conductor portion 222 of the leak sensor 200 is formed on one side frame in the first direction of the first sealing portion 122, which surrounds the first electrode lead 310 and is relatively prone to electrolyte leakage. Therefore, the leak sensor 200 can quickly, accurately, and effectively detect electrolyte leakage.

[0147] According to embodiments of the present invention, the leak sensor 200 may further include a flexible circuit board 210 that is coupled to and installed on the sealing portion 120. The conductor 220 may be a circuit pattern formed on the flexible circuit board 210.

[0148] This allows for the easy and low-cost implementation of a leak sensor 200 with a simple configuration. Furthermore, the weight of the leak sensor 200 can be reduced. Additionally, since the leak sensor 200 can be bent together with the sealing portion 120, the leak sensor 200 can be easily installed.

[0149] According to an embodiment of the present invention, the system may be equipped with a first leak sensor 200A and a second leak sensor 200B, which are the leak sensor 200, respectively. The first leak sensor 200A may be installed by being coupled to one side of the first sealing portion 122 in the vertical direction and in a second direction intersecting the first direction. The second leak sensor 200B may be installed by being coupled to the other side of the first sealing portion 122 in the second direction.

[0150] As a result, electrolyte leaking through one side frame in the first direction of the first sealing portion 122 can come into contact with the conductor 220 of the first leak sensor 200A or the second leak sensor 200B, regardless of whether it adheres to or flows to one side or the other side in the second direction of the first sealing portion 122. Therefore, the leak sensor 200 can quickly, accurately, and reliably detect electrolyte leakage.

[0151] Furthermore, since the first leak sensor 200A and the second leak sensor 200B are coupled and installed on one side and the other side in the second direction of the sealing portion 120, which has a smaller width in the second direction than the housing portion 110 and has remaining empty space in the second direction, further space for installing the first leak sensor 200A and the second leak sensor 200B may not be necessary.

[0152] According to embodiments of the present invention, a battery cell capable of detecting electrolyte leakage may include an electrode assembly, an electrolyte, a case 100 that houses and seals the electrode assembly and the electrolyte, and a leak sensor 200 that is coupled to and installed in the case 100 and detects the electrolyte leaking from the case 100. The case 100 may extend in the vertical direction and in a first direction intersecting the vertical direction. The leak sensor 200 may be formed extending in the vertical direction or formed extending diagonally inclined in a direction perpendicular to the vertical direction toward the vertical direction, and may include a conductor 220 that constitutes an electrical circuit. When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0153] This allows for the easy and low-cost implementation of a leak sensor 200 with a simple configuration. Furthermore, it enables real-time detection of electrolyte leaks.

[0154] Furthermore, the probability of electrolyte leaking from case 100 and flowing downwards coming into contact with the conductor 220 of the leak sensor 200 may increase, and the time and / or number of times it comes into contact with the conductor 220 of the leak sensor 200 may increase. Therefore, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably. As a result, accidents such as fires can be prevented.

[0155] According to an embodiment of the present invention, the conductor 220 may include a first conductor (C1) that is formed extending in the vertical direction or that is formed extending in a direction perpendicular to the vertical direction, and a second conductor (C2) that is formed extending alongside the first conductor (C1) at a predetermined distance apart from the first conductor (C1). The first conductor (C1) and the second conductor (C2) can constitute the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0156] This makes it possible to easily and inexpensively implement a leak sensor 200 with a simple configuration that can quickly, accurately, and reliably detect electrolyte leaking from case 100 and flowing downward.

[0157] According to an embodiment of the present invention, the case may be equipped with a first leak sensor 200A and a second leak sensor 200B, which are the leak sensor 200, respectively. The first leak sensor 200A may be installed coupled to one side of the case 100 in the vertical direction and in a second direction intersecting the first direction. The second leak sensor 200B may be installed coupled to the other side of the case 100 in the second direction.

[0158] As a result, the electrolyte leaking from case 100 can come into contact with the conductor 220 of the first leak sensor 200A or the second leak sensor 200B, regardless of whether it flows to one side or the other side of the second direction of case 100. Therefore, the leak sensor 200 can quickly, accurately, and reliably detect electrolyte leakage.

[0159] According to an embodiment of the present invention, the battery module 1 may include a plurality of battery cells capable of detecting electrolyte leakage, and an ICB (Internal Connection Board) module 20 that is electrically connected to the conductor 220 of the leakage sensor 200 of each of the battery cells capable of detecting electrolyte leakage.

[0160] This makes it possible to easily and inexpensively manufacture battery modules that can detect electrolyte leakage from each battery cell.

[0161] The effects described above, as well as the specific effects of the present invention, will be described in conjunction with the following descriptions of embodiments for carrying out the invention. [Brief explanation of the drawing]

[0162] [Figure 1]This is a schematic perspective view showing a battery cell capable of detecting electrolyte leakage according to one embodiment of the present invention. [Figure 2] This is a schematic exploded perspective view showing a battery cell capable of detecting electrolyte leakage according to one embodiment of the present invention. [Figure 3] This is a schematic front view showing a battery cell capable of detecting electrolyte leakage according to one embodiment of the present invention. [Figure 4] This is a schematic rear view showing a battery cell capable of detecting electrolyte leakage according to one embodiment of the present invention. [Figure 5] Figures 1 to 3 are enlarged front views showing the left side of the area. [Figure 6] Figures 1 to 3 are enlarged perspective views showing the left side of the image. [Figure 7] Figures 1-3, 5, and 6 are front views showing the leak sensors. [Figure 8] This is an enlarged view of A in Figure 7. [Figure 9] This is an enlarged view of B in Figure 7. [Figure 10] This is an enlarged view of C in Figure 7. [Figure 11] This figure schematically shows a partial configuration of a battery module according to one embodiment of the present invention. [Modes for carrying out the invention]

[0163] The aforementioned objectives, features, and advantages will be described in detail below with reference to the attached drawings, so that a person with ordinary skill in the art to which the present invention pertains can easily implement the technical concept of the present invention. In describing the present invention, if a specific description of known technology according to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0164] Although terms like "first," "second," etc., are used to describe various components, these components are, of course, not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise stated, the first component may also be the second component.

[0165] In the entire specification, unless otherwise stated, each component may be singular or plural.

[0166] In the following, the placement of any configuration "above (or below)" a component or "above (or below)" a component means not only that the configuration faces the upper (or lower) surface of the component, but also that other configurations may be interposed between the component and any configuration placed on (or below) it.

[0167] Furthermore, where it is stated that one component is “linked,” “joined,” or “connected” to another component, it should be understood that the components may be directly linked or connected to one another, but may also be “interposed” between each component, or each component may be “linked,” “joined,” or “connected” through other components.

[0168] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “composed of” or “including” in this application should not be interpreted as necessarily including all of the multiple components or stages described in the specification, but rather as some of the components or stages may not be included, or may include further components or stages.

[0169] Figures 1 to 4 are schematic perspective views, exploded perspective views, front views, and rear views of a battery cell capable of detecting electrolyte leakage according to one embodiment of the present invention. Figures 5 and 6 are enlarged front views and enlarged perspective views showing the left side portion of Figures 1 to 3. Figure 7 is a front view showing the leakage sensors of Figures 1 to 3, Figure 5, and Figure 6. Figures 8 to 10 are enlarged views of A, B, and C of Figure 7, respectively. Figure 11 is a schematic diagram showing a part of the configuration of a battery module according to one embodiment of the present invention.

[0170] [First embodiment of a battery cell capable of detecting liquid leakage] Referring to Figures 1 to 6, the leak-detectable battery cell 10 according to the first embodiment may include an electrode assembly (not shown), an electrolyte (not shown), a case 100, and a leak sensor 200. The leak-detectable battery cell 10 may also include a first electrode lead 310 and a second electrode lead 320. The leak-detectable battery cell 10 may also include a first insulating film 410 and a second insulating film 420.

[0171] Below, we will examine each component.

[0172] [Electrode assembly, electrolyte, case] The electrode assembly (not shown) may include a positive electrode, a negative electrode, and a separator membrane interposed between the positive electrode and the negative electrode.

[0173] The electrolyte (not shown) can be injected into the housing 110 and impregnate the electrode assembly.

[0174] The case 100 may include a housing section 110 and a sealing section 120.

[0175] The housing section 110 can accommodate the electrode assembly and the electrolyte.

[0176] The housing section 110 may extend in the vertical direction and in a first direction intersecting the vertical direction (for example, the left-right direction).

[0177] The sealing portion 120 may be formed on the edge of the case 100. The sealing portion 120 can seal the electrode assembly and electrolyte housed in the housing portion 110.

[0178] The sealing portion 120 may include a first sealing portion 122. The sealing portion 120 may include a second sealing portion 124. The sealing portion 120 may include a third sealing portion 126.

[0179] The first sealing portion 122 may be formed on one side (for example, the left side) of the housing portion 110 in the first direction. The first sealing portion 122 may extend in the vertical direction. The first sealing portion 122 may have a predetermined width in the first direction.

[0180] The second sealing portion 124 may be formed on the other side (for example, the right side) of the housing portion 110 in the first direction. The second sealing portion 124 may extend in the vertical direction. The second sealing portion 124 may have a predetermined width in the first direction.

[0181] The third sealing portion 126 may be formed on one side (for example, the upper side) of the housing portion 110 in the vertical direction. The third sealing portion 126 may extend in the first direction. The third sealing portion 126 may have a predetermined width in the vertical direction. The third sealing portion 126 is ventable.

[0182] [Leak sensor] The leak sensor 200 may be installed by being coupled to the sealing portion 120. For example, the leak sensor 200 may be installed by being coupled to the first sealing portion 122.

[0183] As a result, the leak sensor 200 is coupled to and installed in the sealing section 120, which is narrower than the housing section 110 and has remaining empty space around it, thus potentially eliminating the need for additional space to install the leak sensor 200.

[0184] The leak sensor 200 can detect electrolyte leaking from the case 100.

[0185] The leak sensor 200 can be provided in pairs. That is, it can be provided with a first leak sensor 200A and a second leak sensor 200B, which are each a leak sensor 200 (Figures 1 to 6).

[0186] The first leak sensor 200A may be installed coupled to one side (e.g., the front) of the first sealing portion 122 in the vertical direction and in a second direction (e.g., the front-to-back direction) intersecting the first direction. The second leak sensor 200B may be installed coupled to the other side (e.g., the rear) of the first sealing portion 122 in the second direction (Figures 1 to 6).

[0187] As a result, electrolyte leaking through one side frame in the first direction of the first sealing portion 122 can come into contact with the conductor 220 of the first leak sensor 200A or the second leak sensor 200B, regardless of whether it adheres to or flows to one side or the other side in the second direction of the first sealing portion 122. Therefore, the leak sensor 200 can quickly, accurately, and reliably detect electrolyte leakage.

[0188] Furthermore, since the first leak sensor 200A and the second leak sensor 200B are coupled and installed on one side and the other side in the second direction of the sealing portion 120, which has a smaller width in the second direction than the housing portion 110 and has remaining empty space in the second direction, further space for installing the first leak sensor 200A and the second leak sensor 200B may not be necessary.

[0189] In the following, we will specifically discuss the leak sensor 200 using the first leak sensor 200A shown in Figures 7 to 10. The second leak sensor 200B may have the characteristics of the leak sensor 200 described later, and may have a shape that is symmetrical to the first leak sensor 200A in the first direction (Figure 4).

[0190] Referring further to Figures 7 to 10, the leak sensor 200 may include a conductor 220. The leak sensor 200 may also include a flexible circuit board 210.

[0191] The flexible circuit board 210 may be installed by being bonded to the sealing portion 120. For example, the flexible circuit board 210 may be adhered to the sealing portion 120. The flexible circuit board 210 may be an insulating film. The flexible circuit board 210 may be made of a material including PET (Polyethylene terephtalate), PI (Polyimide), or PEN (Polyethylene naphthalate).

[0192] The conductor 220 may also be a circuit pattern formed on the flexible circuit board 210.

[0193] This allows for the easy and low-cost implementation of a leak sensor 200 with a simple configuration. Furthermore, the weight of the leak sensor 200 can be reduced. Additionally, since the leak sensor 200 can be bent together with the sealing portion 120, the leak sensor 200 can be easily installed.

[0194] The conductor 220 may be formed in part adjacent to the frame of the sealing portion 120, but may also be formed extending along the frame of the sealing portion 120 (Figures 1 to 6). For example, of the first conductor (C1) to the sixth conductor (C6) constituting the conductor 220, the first conductor (C1) to the fourth conductor (C4) may be formed adjacent to the frame of the sealing portion 120, but may also be formed extending along the frame of the sealing portion 120 (Figures 7 to 10).

[0195] As a result, the electrolyte leaks mainly through the frame of the sealing portion 120, and although the conductor 220 of the leak sensor 200 is formed adjacent to the frame of these sealing portions 120, it extends along the frame of these sealing portions 120. Therefore, the leak sensor 200 can quickly and accurately detect electrolyte leakage. This helps to prevent accidents such as fires.

[0196] The conductor 220 can constitute an electrical circuit. When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0197] For example, a weak current may always flow through the conductor 220 of the electrical circuit, and when leaking electrolyte comes into contact with the conductor 220, the resistance of the electrical circuit may decrease. In another example, no current may always flow through the conductor 220, but when leaking electrolyte comes into contact with the conductor 220, a current may flow through the conductor 220.

[0198] This allows for the easy and low-cost implementation of a leak sensor 200 with a simple configuration. Furthermore, it enables real-time detection of electrolyte leaks.

[0199] The electrical circuit, composed of the conductor 220, can be connected to an Interconnect Circuit Board (ICB). When the resistance of the electrical circuit changes, the ICB can sense this and transmit an electrical signal to a battery management system (BMS).

[0200] Here, ICB may mean a substrate having at least one element that transmits information between the battery and the BMS. Typically, an ICB can be provided with at least one element that transmits information sensed from the electrode leads of the battery cell, such as voltage information, to the BMS. The ICB of the present invention can be provided with an element that transmits information such as the resistance change of the electrical circuit of the leak sensor 200 to the BMS. The ICB of the present invention can be provided separately from a conventional ICB.

[0201] Furthermore, here, BMS may refer to a system that monitors the state of battery cells, such as temperature, voltage, and current, and controls battery cell balancing, charging and discharging based on State of Charge (SOC) estimation, etc., based on the monitored state of the battery cells. The BMS of the present invention can take appropriate measures for battery cells that have detected electrolyte leakage. For example, the BMS can shut off charging and discharging of battery cells that have detected electrolyte leakage.

[0202] The conductor 220 may include a first conductor (C1) and a second conductor (C2). The conductor 220 may further include a third conductor (C3). The conductor 220 may further include a fourth conductor (C4). The conductor 220 may further include a fifth conductor (C5) and a sixth conductor (C6).

[0203] The first conductor (C1) may be formed adjacent to the frame of the sealing portion 120. The first conductor (C1) may also be formed extending along the frame of the sealing portion 120.

[0204] The second conductor (C2) may be formed further inside the sealing portion 120 than the first conductor (C1). The second conductor (C2) may be formed extending alongside the first conductor (C1) at a predetermined distance from it. The first conductor (C1) and the second conductor (C2) can constitute the electrical circuit.

[0205] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0206] This makes it possible to easily realize a leak sensor 200 at low cost with a simple configuration.

[0207] The third conductor (C3) may be formed further inside the sealing portion 120 than the second conductor (C2). The third conductor (C3) may be formed extending alongside the second conductor (C2) at a predetermined distance from it. The third conductor (C3) can constitute the electrical circuit.

[0208] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously. As a result, the first conductor (C1) and the second conductor (C2), or the second conductor (C2) and the third conductor (C3), are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0209] This can increase the leakage detection area or leakage detection width of the leakage sensor 200, or decrease the separation distance between the first conductor (C1) and the second conductor (C2), or between the second conductor (C2) and the third conductor (C3), thereby potentially improving the performance or sensitivity of the leakage sensor 200.

[0210] The first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other. For example, the ends of the first conductor (C1) and the third conductor (C3) can be connected by a first connecting conductor (J1) (Figure 10).

[0211] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect both the electrolyte flowing through the first conductor (C1) and the second conductor (C2), and the electrolyte flowing through the second conductor (C2) and the third conductor (C3), using a simple configuration.

[0212] For example, if only one of the first conductor (C1) and the third conductor (C3) is connected to the first electrode (e.g., the + pole) of an external power supply, and the second conductor (C2) is connected to the second electrode (e.g., the - pole) of the same external power supply, then the leak sensor 200 can detect both the electrolyte passing through the first conductor (C1) and the second conductor (C2), and the electrolyte passing through the second conductor (C2) and the third conductor (C3). In other words, since only one external power supply is required, the electrical circuit becomes simpler, and costs and installation space can be reduced. Furthermore, in order to connect to the first electrode of this one external power supply, it is sufficient for only one of the first conductor (C1) and the third conductor (C3) to be directly connected to the terminal portion 228 of the leak sensor 200 connected to the external power supply, so the electrical circuit can be simplified.

[0213] The fourth conductor (C4) may be formed further inside the sealing portion 120 than the third conductor (C3). The fourth conductor (C4) may be formed extending alongside the third conductor (C3) at a predetermined distance from it. The fourth conductor (C4) can constitute the electrical circuit.

[0214] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, or with the third conductor (C3) and the fourth conductor (C4) simultaneously. As a result, the first conductor (C1) and the second conductor (C2), the second conductor (C2) and the third conductor (C3), or the third conductor (C3) and the fourth conductor (C4) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0215] This can increase the leak detection area or leak detection width of the leak sensor 200, or decrease the separation distance between the first conductor (C1) and the second conductor (C2), the second conductor (C2) and the third conductor (C3), or the third conductor (C3) and the fourth conductor (C4), thereby potentially improving the performance or sensitivity of the leak sensor 200.

[0216] The first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other, and the second conductor (C2) and the fourth conductor (C4) may also be formed by connecting them to each other. For example, the ends of the first conductor (C1) and the third conductor (C3) can be connected by a first connecting conductor (J1) (Figure 10). Also, the ends of the second conductor (C2) and the fourth conductor (C4) can be connected by a second connecting conductor (J2) (Figure 8).

[0217] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect electrolyte flowing through the first conductor (C1) and the second conductor (C2), the electrolyte flowing through the second conductor (C2) and the third conductor (C3), and the electrolyte flowing through the third conductor (C3) and the fourth conductor (C4) with a simple configuration.

[0218] For example, if only one of the first conductor (C1) and the third conductor (C3) is connected to the first electrode (e.g., the positive terminal) of an external power supply, and only one of the second conductor (C2) and the fourth conductor (C4) is connected to the second electrode (e.g., the negative terminal) of the same external power supply, then the leak sensor 200 can detect electrolyte flowing through the first conductor (C1) and the second conductor (C2), the electrolyte flowing through the second conductor (C2) and the third conductor (C3), and the electrolyte flowing through the third conductor (C3) and the fourth conductor (C4). In other words, since only one external power supply is required, the electrical circuit becomes simpler, and costs and installation space can be reduced. Furthermore, in order to connect to the first electrode of one of these external power supplies, it is sufficient that only one of the first conductor (C1) and the third conductor (C3) is directly connected to the terminal portion 228 of the leak sensor 200 connected to the external power supply, and in order to connect to the second electrode of one of these external power supplies, it is sufficient that only one of the second conductor (C2) and the fourth conductor (C4) is directly connected to yet another terminal portion 228 of the leak sensor 200 connected to the external power supply, so the electrical circuit can be simplified.

[0219] The fifth conductor (C5) and the sixth conductor (C6) will be described later.

[0220] On the other hand, as mentioned above, the leak sensor 200 may be installed coupled to the first sealing portion 122. In this case, the conductor 220 may include one-side conductor portion 222. The conductor 220 may include a lower conductor portion 224. The conductor 220 may include another-side conductor portion 226. The conductor 220 may include a terminal portion 228.

[0221] The one-sided conductor portion 222 may be formed adjacent to one side (for example, the left side) of the first sealing portion 122 in the first direction. The one-sided conductor portion 222 may be formed extending vertically along one side frame of the first sealing portion 122 in the first direction, or it may be formed extending diagonally inclined in a direction perpendicular to the vertical direction. The one-sided conductor portion 222 can constitute the electrical circuit.

[0222] When the leaking electrolyte comes into contact with the one-sided conductor portion 222, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0223] This increases the probability that electrolyte leaking through the first side frame of the first sealing portion 122 or flowing downward will come into contact with the conductor 220 of the leak sensor 200, and the time and / or number of times it comes into contact with the conductor 220 of the leak sensor 200 may increase. Thus, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably.

[0224] The one-sided conductor portion 222 may include the first conductor (C1) and the second conductor (C2) described above. The one-sided conductor portion 222 may also include the third conductor (C3) described above. The one-sided conductor portion 222 may also include the fourth conductor (C4) described above.

[0225] The lower conductor portion 224 may be formed adjacent to the lower frame of the first sealing portion 122. The lower conductor portion 224 may be formed extending in a first direction along the lower frame of the first sealing portion 122, or it may be formed extending at an angle perpendicular to the first direction toward the first direction. The lower conductor portion 224 can constitute the electrical circuit.

[0226] When the leaking electrolyte comes into contact with the lower conductor portion 224, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0227] As a result, the probability of electrolyte leaking through the frame of the first sealing portion 122 and flowing downwards, or adhering to or accumulating on the downward side, coming into contact with the conductor 220 of the leak sensor 200 may increase, and the time and / or number of times it comes into contact with the conductor 220 of the leak sensor 200 may increase. Therefore, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably.

[0228] The lower conductor portion 224 may include the aforementioned first conductor (C1) and second conductor (C2). The lower conductor portion 224 may include the aforementioned third conductor (C3). The lower conductor portion 224 may include the aforementioned fourth conductor (C4).

[0229] The lower conductor portion 224 may extend to a position corresponding to the other end of the first sealing portion 122 in the first direction.

[0230] This allows the leakage detection area of ​​the leakage sensor 200 to be increased, which may improve the performance or sensitivity of the leakage sensor 200.

[0231] The one-sided conductor portion 222 and the lower conductor portion 224 may be formed by connecting them to each other. For example, the first conductor (C1) to the fourth conductor (C4) included in the one-sided conductor portion 222 may be formed by connecting them to the first conductor (C1) to the fourth conductor (C4) included in the lower conductor portion 224 (Figure 10).

[0232] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect both the electrolyte passing through the one-sided conductor portion 222 and the electrolyte passing through the lower conductor portion 224, using a simple configuration.

[0233] For example, if either the one-sided conductor section 222 or the lower conductor section 224 can be connected to an external power supply, the leak sensor 200 can detect both the electrolyte passing through the one-sided conductor section 222 and the electrolyte passing through the lower conductor section 224. In other words, since only one external power supply is required, the electrical circuit becomes simpler, potentially reducing costs and installation space. Furthermore, since it is sufficient for either the one-sided conductor section 222 or the lower conductor section 224 to be directly connected to the terminal section 228 of the leak sensor 200 connected to the external power supply, the electrical circuit can be simplified.

[0234] The other conductor portion 226 may be formed on the other side (for example, the right side) of the one conductor portion 222 in the first direction. The other conductor portion 226 may be formed extending in the vertical direction, or extending in a direction perpendicular to the vertical direction. The other conductor portion 226 can constitute the electrical circuit.

[0235] When the leaking electrolyte comes into contact with the other conductor portion 226, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0236] As a result, electrolyte that adheres to or flows to the other side of the first sealing portion 122 in the first direction can also come into contact with the conductor 220 of the leak sensor 200. Therefore, the leak sensor 200 can quickly, accurately, and reliably detect electrolyte leakage.

[0237] The other conductor portion 226 may include a fifth conductor (C5) and a sixth conductor (C6).

[0238] The fifth conductor (C5) may be formed on the other side (for example, the right side) of the one-sided conductor portion 222 in the first direction. The fifth conductor (C5) may be formed extending in the vertical direction, or extending in a direction perpendicular to the vertical direction.

[0239] The sixth conductor (C6) may be formed extending alongside the fifth conductor (C5) at a predetermined distance from it. The fifth conductor (C5) and the sixth conductor (C6) can constitute the electrical circuit.

[0240] The leaking electrolyte comes into contact with the fifth conductor (C5) and the sixth conductor (C6) simultaneously, and as a result, the fifth conductor (C5) and the sixth conductor (C6) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0241] The one-sided conductor section 222 and the other-sided conductor section 226 may be formed by connecting with the lower conductor section 224. For example, the first conductor (C1) to the fourth conductor (C4) included in the one-sided conductor section 222 may be formed by connecting with the first conductor (C1) to the fourth conductor (C4) included in the lower conductor section 224 (Figure 10). Also, the third conductor (C3) and the fourth conductor (C4) included in the lower conductor section 224 may be formed by connecting with the fifth conductor (C5) and the sixth conductor (C6) included in the other-sided conductor section 226, respectively (Figure 10).

[0242] This makes it possible to easily and inexpensively realize a leak sensor 200 that can detect the electrolyte passing through the one-sided conductor portion 222, the electrolyte passing through the lower-sided conductor portion 224, and the electrolyte passing through the other-sided conductor portion 226, using a simple configuration.

[0243] For example, if only one of the one-sided conductor section 222, the lower conductor section 224, or the other-sided conductor section 226 can be connected to an external power supply, the leak sensor 200 can detect electrolyte passing through the one-sided conductor section 222, the lower conductor section 224, and the other-sided conductor section 226. In other words, since only one external power supply is required, the electrical circuit becomes simpler, potentially reducing costs and installation space. Furthermore, since it is sufficient for only one of the one-sided conductor section 222, the lower conductor section 224, or the other-sided conductor section 226 to be directly connected to the terminal section 228 of the leak sensor 200 that is connected to the external power supply, the electrical circuit can be simplified.

[0244] Furthermore, the vertical lengths of the one-sided conductor portion 222 and the other-sided conductor portion 226 may be increased, and the first-direction length of the lower conductor portion 224 may be increased. Therefore, the probability of electrolyte leaking through the frame of the first sealing portion 122 or flowing downward coming into contact with the conductor 220 of the leak sensor 200 may increase, and the time and / or number of times it comes into contact with the conductor 220 of the leak sensor 200 may increase. Thus, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably.

[0245] The terminal portion 228 can constitute the electrical circuit. The terminal portion 228 can be connected to an external object (for example, an external power supply or external wire). The terminal portion 228 can be connected to the one-sided conductor portion 222.

[0246] The terminal portion 228 may be formed on the upper side of the liquid leak sensor 200.

[0247] As a result, the terminal portion 228 of the conductor 220 connected to an external object (e.g., an external power supply) does not need to be in contact with the electrolyte that leaks and flows downwards, or adheres to or accumulates on the downward side. Therefore, it is possible to prevent short circuits from occurring in the electrical circuit and to prevent damage to the connection point between the conductor 220 and the external object.

[0248] The terminal portion 228 may be formed above the one-sided conductor portion 222.

[0249] This allows the terminal portion 228 to be connected to an external object (e.g., an external power supply) and the connection to be maintained without interference from the one-sided conductor portion 222. Therefore, the leak sensor 200 and an external object (e.g., an external power supply) can be easily and stably connected and the connection can be maintained.

[0250] [First electrode lead 310, second electrode lead 320] The first electrode lead 310 may be housed in the housing portion 110 and positioned on one side in the first direction of the electrode assembly that extends in the first direction. The first electrode lead 310 can be connected to the electrode assembly. In this case, as described above, the leak sensor 200 may be installed coupled to the first sealing portion 122, or it may include a one-sided conductor portion 222.

[0251] As a result, the one-sided conductor portion 222 of the leak sensor 200 is formed on one side frame in the first direction of the first sealing portion 122, which surrounds the first electrode lead 310 and is relatively prone to electrolyte leakage. Therefore, the leak sensor 200 can quickly, accurately, and effectively detect electrolyte leakage.

[0252] The first electrode lead 310 may face the leak sensor 200 in a second direction via the first sealing portion 122. The clearance distance and creepage distance between the first electrode lead 310 and the conductor 220 of the leak sensor 200 are preferably 0.8 mm or more and 1.0 mm or more, respectively. This is because the voltage of the electrode assembly of the battery cell 10 described above is approximately 3.5 V. If the voltage is changed, the clearance distance or creepage distance may be changed.

[0253] The second electrode lead 320 may be positioned on the other side of the electrode assembly in the first direction. The second electrode lead 320 can be connected to the electrode assembly.

[0254] [First insulating film 410, second insulating film 420] The first insulating film 410 can be interposed between the first electrode lead 310 and the first sealing portion 122. The first insulating film 410 can improve the airtightness between the first electrode lead 310 and the first sealing portion 122.

[0255] The first insulating film 410 can improve the insulation between the first electrode lead 310 and the metal layer of the case 100. Furthermore, the first insulating film 410 can improve the insulation between the first electrode lead 310 and the conductor 220 of the leak sensor 200. Specifically, the first insulating film 410 can increase the insulating space distance and the insulating creepage distance between the first electrode lead 310 and the conductor 220 of the leak sensor 200.

[0256] The second insulating film 420 may be interposed between the second electrode lead 320 and the second sealing portion 124. The second insulating film 420 can improve the airtightness between the second electrode lead 320 and the second sealing portion 124.

[0257] [Second embodiment of a battery cell capable of detecting liquid leakage] The leak-detecting battery cell according to the second embodiment may include, as described above, an electrode assembly (not shown), an electrolyte (not shown), a case 100, and a leak sensor 200. Below, we will consider the characteristic configuration of the leak-detecting battery cell according to the second embodiment.

[0258] Case 100 may extend in the vertical direction and in the first direction.

[0259] The leak sensor 200 may be installed coupled to the case 100. That is, the leak sensor 200 may not be installed coupled to the sealing portion 120 of the case 100. For example, the leak sensor 200 may be installed coupled to the housing portion 210.

[0260] The conductor 220 of the leak sensor 200 may be formed extending in the vertical direction, or it may be formed extending in a direction perpendicular to the vertical direction. In other words, the conductor 220 of the leak sensor 200 may not be formed adjacent to the frame of the sealing portion 120, nor may it be formed extending along the frame of the sealing portion 120.

[0261] The conductor 220 of the leak sensor 200 can constitute an electrical circuit. When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change.

[0262] This allows for the easy and low-cost implementation of a leak sensor 200 with a simple configuration. Furthermore, it enables real-time detection of electrolyte leaks.

[0263] Furthermore, the electrolyte leaking from case 100 and flowing downward may have an increased probability of coming into contact with the conductor 220 of the leak sensor 200, and the time and / or number of times it comes into contact with the conductor 220 of the leak sensor 200 may increase. Therefore, the leak sensor 200 can detect electrolyte leakage quickly, accurately, and reliably. As a result, accidents such as fires can be prevented.

[0264] The conductor 220 may include a first conductor (C1) and a second conductor (C2).

[0265] The first conductor (C1) may be formed extending in the vertical direction, or it may be formed extending in the vertical direction with an oblique inclination perpendicular to the vertical direction.

[0266] The second conductor (C2) may be formed extending alongside the first conductor (C1) at a predetermined distance from it.

[0267] The first conductor (C1) and the second conductor (C2) can constitute the aforementioned electrical circuit.

[0268] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0269] This makes it possible to easily and inexpensively implement a leak sensor 200 with a simple configuration that can quickly, accurately, and reliably detect electrolyte leaking from case 100 and flowing downward.

[0270] The conductor 220 may further include a third conductor (C3).

[0271] The third conductor (C3) may be formed extending alongside the second conductor (C2) at a predetermined distance from it. The second conductor (C2) may be formed between the third conductor (C3) and the first conductor (C1). The third conductor (C3) can constitute the electrical circuit.

[0272] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously. As a result, the first conductor (C1) and the second conductor (C2), or the second conductor (C2) and the third conductor (C3), are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0273] The first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other.

[0274] The conductor 220 may further include a fourth conductor (C4).

[0275] The fourth conductor (C4) may be formed extending alongside the third conductor (C3) at a predetermined distance from it. The third conductor (C3) may be formed between the fourth conductor (C4) and the second conductor (C2). The fourth conductor (C4) can constitute the electrical circuit.

[0276] The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, or with the third conductor (C3) and the fourth conductor (C4) simultaneously. As a result, the first conductor (C1) and the second conductor (C2), the second conductor (C2) and the third conductor (C3), or the third conductor (C3) and the fourth conductor (C4) are electrically connected by the leaking electrolyte, which can cause at least one of the resistance, current, and voltage of the electrical circuit to change.

[0277] The first conductor (C1) and the third conductor (C3) may be formed by connecting them to each other, and the second conductor (C2) and the fourth conductor (C4) may also be formed by connecting them to each other.

[0278] A pair of leak sensors 200 may be provided. That is, a first leak sensor 200A and a second leak sensor 200B may be provided, which are each a leak sensor 200. The first leak sensor 200A may be installed coupled to one side of the case 100 in the second direction. The second leak sensor 200B may be installed coupled to the other side of the case 100 in the second direction.

[0279] As a result, the electrolyte leaking from case 100 can come into contact with the conductor 220 of the first leak sensor 200A or the second leak sensor 200B, regardless of whether it flows to one side or the other side of the second direction of case 100. Therefore, the leak sensor 200 can quickly, accurately, and reliably detect electrolyte leakage.

[0280] Matters not mentioned regarding the battery cell capable of detecting liquid leakage according to the above-described second embodiment can be analogized from the battery cell capable of detecting liquid leakage according to the first embodiment described above.

[0281] [Battery Module] Referring further to FIG. 11, a battery module according to an embodiment may include a plurality of battery cells (hereinafter, battery cells) capable of detecting liquid leakage of an electrolytic solution, and an ICB (Internal Connection Board) module 20.

[0282] The battery cell is a battery cell capable of detecting liquid leakage of the electrolytic solution according to the first or second embodiment described above.

[0283] The ICB module 20 may include an ICB 22 and a connecting portion 24.

[0284] As described above, the ICB 22 can detect changes such as the resistance of the electric circuit of the liquid leakage sensor 200 of each battery cell. When the resistance of the electric circuit or the like changes, the ICB 22 can transmit an electrical signal to the BMS (battery management system). The ICB 22 may be an FPC (flexible printed circuit board).

[0285] The connecting portion 24 can electrically connect the ICB 22 and the conductor 220 of the liquid leakage sensor 200 of each battery cell. The connecting portion 24 can connect to the terminal portion 228 of the liquid leakage sensor 200 of each battery cell. The connecting portion 24 may be an FPC formed integrally with the ICB 22 (FIG. 11). However, different from FIG. 11, the connecting portion 24 may be a wire that is not an FPC. The connecting portion 24 can be vented and connected to the conductor 220 of the liquid leakage sensor 200 of each battery cell (FIG. 11). The connecting portion 24 can be electrically connected to the conductor 220 of the liquid leakage sensor 200 of each battery cell by methods such as ACF bonding, riveting, and welding.

[0286] This makes it possible to easily and inexpensively manufacture battery modules that can detect electrolyte leakage from each battery cell.

[0287] The embodiments described above should be understood to be illustrative and not limiting in all respects, and the scope of the present invention is indicated more by the claims described below than by the detailed description above. Furthermore, the meaning and scope of the claims described below, as well as any modified and transformable forms conceived from their equivalent concepts, should all be interpreted as being included within the scope of the present invention.

[0288] As described above, the present invention has been explained with reference to the illustrative drawings, but it is clear that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications can be made by an ordinary person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described in the embodiments described above, it is natural that the effects that can be predicted by such configurations should also be acknowledged. [Explanation of Symbols]

[0289] 1 Battery Module 10 Battery cells capable of detecting electrolyte leakage 100 cases 110 Storage Unit 120 Sealing section 122 First sealing section 124 Second sealing section 126 Third sealing section 200 Leakage Sensor 200A No. 1 Leak Sensor 200B Second Leak Sensor 210 Flexible circuit board 220 Conductor 222 One-sided conductor section 224 Lower conductor section 226 Other side conductor section 228 Terminal section C1 First conductor C2 Second conductor C3 Third conductor C4 is the fourth conductor. C5 Fifth conductor C6 6th conductor 310 First electrode lead 320 Second electrode lead 410 First insulating film 420 Second insulating film 20 ICB modules 22 ICB 24 Connecting part

Claims

1. Electrode assembly and Electrolyte and A case 100 including a housing portion 110 for housing the electrode assembly and electrolyte, and a sealing portion 120 formed on the edge for sealing the electrode assembly and electrolyte housed in the housing portion 110, A leak sensor 200 is installed coupled to the sealing portion 120 and detects the electrolyte leaking from the case 100, Includes, The leak sensor 200 includes a conductor 220 that is formed in an electrical circuit, at least a portion of which is adjacent to the frame of the sealing portion 120, but which extends along the frame of the sealing portion 120. When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change. A battery cell capable of detecting electrolyte leakage.

2. The conductor 220 includes a first conductor (C1) formed adjacent to the frame of the sealing portion 120 but extending along the frame of the sealing portion 120, and a second conductor (C2) formed further inside the sealing portion 120 than the first conductor (C1), but extending alongside the first conductor (C1) at a predetermined distance apart from the first conductor (C1). The first conductor (C1) and the second conductor (C2) constitute the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolyte, causing at least one of the resistance, current, and voltage of the electrical circuit to change. A battery cell capable of detecting electrolyte leakage as described in claim 1.

3. The conductor 220 is formed inside the sealing portion 120, but is separated from the second conductor (C2) by a predetermined distance and extends alongside the second conductor (C2), and further includes a third conductor (C3) that constitutes the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2), or the second conductor (C2) and the third conductor (C3), are electrically connected by the leaking electrolyte, causing at least one of the resistance, current, and voltage of the electrical circuit to change. A battery cell capable of detecting electrolyte leakage as described in claim 2.

4. The first conductor (C1) and the third conductor (C3) are connected to each other to form a structure. A battery cell capable of detecting electrolyte leakage as described in claim 3.

5. The conductor 220 is formed inside the sealing portion 120, but is separated from the third conductor (C3) by a predetermined distance and extends alongside the third conductor (C3), and further includes a fourth conductor (C4) which constitutes the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, or with the second conductor (C2) and the third conductor (C3) simultaneously, or with the third conductor (C3) and the fourth conductor (C4) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2), the second conductor (C2) and the third conductor (C3), or the third conductor (C3) and the fourth conductor (C4) are electrically connected by the leaking electrolyte, causing at least one of the resistance, current, and voltage of the electrical circuit to change. A battery cell capable of detecting electrolyte leakage according to claim 3 or 4.

6. The first conductor (C1) and the third conductor (C3) are formed by connecting them to each other. The second conductor (C2) and the fourth conductor (C4) are connected to each other and formed as follows: A battery cell capable of detecting electrolyte leakage as described in claim 5.

7. The housing portion 110 extends in the vertical direction and in a first direction intersecting the vertical direction, The sealing portion 120 is formed on one side of the housing portion 110 in the first direction, extends in the vertical direction, and includes a first sealing portion 122 having a predetermined width in the first direction. The leak sensor 200 is installed coupled to the first sealing portion 122. The conductor 220 is formed adjacent to one side frame in the first direction of the first sealing portion 122, but extends vertically along one side frame in the first direction of the first sealing portion 122, or extends diagonally inclined in a direction perpendicular to the vertical direction toward the vertical direction, and includes one side conductor portion 222 that constitutes the electrical circuit. When the leaking electrolyte comes into contact with the one-sided conductor portion 222, at least one of the resistance, current, and voltage of the electrical circuit may change. A battery cell capable of detecting electrolyte leakage as described in claim 1.

8. The conductor 220 is formed adjacent to the lower frame of the first sealing portion 122, but is formed extending in a first direction along the lower frame of the first sealing portion 122, or is formed extending at an angle perpendicular to the first direction toward the first direction, and further includes a lower conductor portion 224 that constitutes the electrical circuit. When the leaking electrolyte comes into contact with the lower conductor portion 224, at least one of the resistance, current, and voltage of the electrical circuit may change. A battery cell capable of detecting electrolyte leakage as described in claim 7.

9. The lower conductor portion 224 extends to a position corresponding to the other end of the first sealing portion 122 in the first direction. A battery cell capable of detecting electrolyte leakage as described in claim 8.

10. The aforementioned one-sided conductor portion 222 and the lower conductor portion 224 are formed by being connected to each other. A battery cell capable of detecting electrolyte leakage according to claim 8 or 9.

11. The conductor 220 is formed on the other side of the one-side conductor portion 222 in the first direction, but is formed extending in the vertical direction or extending in a direction perpendicular to the vertical direction, and includes the other-side conductor portion 226 that constitutes the electrical circuit. When the leaking electrolyte comes into contact with the other conductor portion 226, at least one of the resistance, current, and voltage of the electrical circuit may change. A battery cell capable of detecting electrolyte leakage as described in claim 8.

12. The one-sided conductor portion 222 and the other-sided conductor portion 226 are formed by being connected to the lower conductor portion 224. A battery cell capable of detecting electrolyte leakage according to claim 11.

13. The conductor 220 further includes a terminal portion 228 that is connected to an external object constituting the electrical circuit and connected to the one-sided conductor portion 222. The terminal portion 228 is formed on the upper side of the leak sensor 200. A battery cell capable of detecting electrolyte leakage as described in claim 7.

14. The terminal portion 228 is formed above the one-sided conductor portion 222. A battery cell capable of detecting electrolyte leakage as described in claim 13.

15. The first electrode lead 310 is housed in the housing portion 110 and is positioned on one side in the first direction of the electrode assembly that extends in the first direction, and is connected to the electrode assembly. The sealing portion 120 is formed on one side of the electrode assembly and housing portion 110 in the first direction and includes a first sealing portion 122 surrounding the first electrode lead 310. The leak sensor 200 is installed coupled to the first sealing portion 122. The conductor 220 is formed adjacent to one side frame in the first direction of the first sealing portion 122, but extends along one side frame in the first direction of the first sealing portion 122, and includes one side conductor portion 222 that constitutes the electrical circuit. When the leaking electrolyte comes into contact with the one-sided conductor portion 222, at least one of the resistance, current, and voltage of the electrical circuit may change. A battery cell capable of detecting electrolyte leakage as described in claim 1.

16. The leak sensor 200 further includes a flexible circuit board 210 which is coupled to and installed on the sealing portion 120. The conductor 220 is a circuit pattern formed on the flexible circuit board 210. A battery cell capable of detecting electrolyte leakage as described in claim 1.

17. Each of the above-mentioned leak sensors 200 comprises a first leak sensor 200A and a second leak sensor 200B, The first leak sensor 200A is installed by being coupled to one side of the first sealing portion 122 in the vertical direction and in a second direction intersecting the first direction. The second leak sensor 200B is installed by being coupled to the other side of the first sealing portion 122 in the second direction. A battery cell capable of detecting electrolyte leakage as described in claim 7.

18. Electrode assembly and Electrolyte and A case 100 that houses and seals the electrode assembly and electrolyte, A leak sensor 200 is installed coupled to the case 100 and detects the electrolyte leaking from the case 100, Includes, The case 100 extends in the vertical direction and in a first direction intersecting the vertical direction, The leak sensor 200 is formed to extend in the vertical direction, or to extend in the vertical direction and at an angle perpendicular to the vertical direction, and includes a conductor 220 that constitutes an electrical circuit. When the leaking electrolyte comes into contact with the conductor 220, at least one of the resistance, current, and voltage of the electrical circuit may change. A battery cell capable of detecting electrolyte leakage.

19. The conductor 220 includes a first conductor (C1) which is formed extending in the vertical direction or which is formed extending in a direction perpendicular to the vertical direction, and a second conductor (C2) which is formed extending alongside the first conductor (C1) at a predetermined distance apart from the first conductor (C1). The first conductor (C1) and the second conductor (C2) constitute the electrical circuit. The leaking electrolyte comes into contact with the first conductor (C1) and the second conductor (C2) simultaneously, and as a result, the first conductor (C1) and the second conductor (C2) are electrically connected by the leaking electrolyte, causing at least one of the resistance, current, and voltage of the electrical circuit to change. A battery cell capable of detecting electrolyte leakage according to claim 18.

20. A battery module comprising a battery cell capable of detecting electrolyte leakage according to any one of claims 1, 2, 7, 15, 16, or 18, Multiple battery cells capable of detecting leakage of the aforementioned electrolyte, An ICB (Internal Connection Board) module 20 is electrically connected to the conductor 220 of the leak sensor 200 of each battery cell capable of detecting leakage of the electrolyte, including, Battery module.

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