Battery, electrical device, leakage detection method, storage medium and program product

Abstract

The embodiments of the present application provide a battery, an electrical device, a leakage detection method, a storage medium, and a program product, and relate to the field of battery technology, wherein the battery includes: a seal; a leakage detection module, which is used to detect whether the seal has liquid leakage, and when it is determined that the seal has liquid leakage, sends the leakage detection result to the target system. The present application detects whether the seal has liquid leakage through the leakage detection module, so that the battery has the ability to detect liquid leakage, can detect whether the sealing position where the seal is installed has liquid leakage, avoids false alarms caused by condensed water, etc., and improves the accuracy of liquid leakage detection; by sending the leakage detection result to the target system, the liquid leakage detection of the seal can be monitored.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery, an electrical device, a leakage detection method, a storage medium and a program product. Background Art

[0002] Batteries are installed in electric vehicles and other electrical devices. During the operation of the electrical devices, the batteries may come into contact with liquids such as water. If liquids such as water enter the battery box, it is easy to cause the battery cells in the box to short-circuit and catch fire, or even explode. In order to seal the gap at the connection position between the box and the box cover, a seal such as a gasket can be installed at the connection position between the box and the box cover to prevent liquids such as water from entering the battery box. However, during the use of the battery, the battery may be subjected to different impacts, causing the seal of the seal to fail. At present, a water leakage detection rope is usually used for liquid leakage detection; in the battery box and below the seal, two parallel water leakage detection ropes are arranged around the box, the two water leakage detection ropes are glued to the box wall and powered on, and the controller detects the current of the detection loop formed by the two water leakage detection ropes; when there is water or other liquid acting as a conductor between the two water leakage detection ropes, the controller detects that the current of the detection loop has changed significantly, determines that the seal has liquid leakage and issues an alarm. However, the temperature inside the battery box varies greatly, and cooling water is easily generated on the box wall. When the cold water is located between the two leakage detection ropes, the controller will give a false alarm, reducing the accuracy of liquid leakage detection. Summary of the invention

[0003] In view of the above problems, the present application provides a battery, an electrical device, a leakage detection method, a storage medium and a program product.

[0004] In some embodiments, according to the first aspect of the present disclosure, a battery is provided, comprising: a seal; and a leakage detection module for detecting whether liquid leakage occurs on the sealing surface of the seal, and sending a leakage detection result to a target system when it is determined that liquid leakage occurs on the sealing surface.

[0005] The battery described in the embodiment of the present application detects whether liquid leakage occurs in the seal through the leakage detection module, so that the battery has the ability to detect liquid leakage and can detect whether liquid leakage occurs in the sealing position where the seal is installed, thereby avoiding false alarms due to condensed water, etc., and improving the accuracy of liquid leakage detection; by sending the leakage detection result to the target system, the liquid leakage detection of the seal can be monitored.

[0006] In some embodiments, the liquid leakage detection module includes: a detection circuit unit installed on the sealing surface of the seal; a controller electrically connected to the detection circuit unit, for collecting electrical parameters of the detection circuit unit, and determining whether liquid leakage occurs on the sealing surface based on the electrical parameters; when it is determined that liquid leakage occurs on the sealing surface, the liquid leakage detection result is generated and sent to the target system.

[0007] The battery described in the embodiment of the present application is equipped with a detection circuit unit on the sealing surface of the seal to detect liquid leakage on the sealing surface. The controller collects electrical parameters of the detection circuit unit to determine whether liquid leakage occurs on the sealing surface and sends a detection report. It can accurately detect whether liquid leakage occurs on the sealing surface and send the detection results of liquid leakage detection.

[0008] In some embodiments, the detection circuit unit includes at least one detection circuit, each of the detection circuits includes a detection line and a sensing line, the first end of the detection line is connected to the first end of the sensing line, and the second end of the detection line and the second end of the sensing line are respectively connected to the controller; the controller is used to determine whether liquid leakage occurs on the sealing surface based on the electrical parameters of the at least one detection circuit.

[0009] The battery described in the embodiment of the present application can accurately detect whether liquid leakage occurs on the sealing surface by performing liquid leakage detection on the sealing surface through the detection circuit, and can provide the ability to locate the position of the leakage point through the sensing line.

[0010] In some embodiments, the resistance per unit length of the sensing line is a constant value.

[0011] The battery described in the embodiment of the present application can provide accurate leakage positioning results by using a sensing line with a constant resistance value per unit length.

[0012] In some embodiments, the number of the detection circuits is two; the two detection circuits are installed on the sealing surface, wherein the sensing lines of the two detection circuits are arranged adjacent to each other.

[0013] The battery described in the embodiment of the present application can accurately detect whether liquid leakage occurs on the sealing surface by performing liquid leakage detection on the sealing surface through two detection circuits installed on the sealing surface, and can locate the leakage point to provide accurate leakage location results.

[0014] In some embodiments, the leakage detection result includes first leakage alarm information; the controller is used to determine that liquid leakage has occurred on the sealing surface when the current value of one of the two detection circuits is greater than a current threshold, generate the first leakage alarm information and send it to the target system.

[0015] The battery described in the embodiment of the present application generates a first leakage alarm message and sends it to the target system through a controller when the current in one of the two detection circuits is greater than a threshold value. It can accurately detect whether liquid leakage occurs on the sealing surface and can send an alarm message to realize a leakage alarm reminder function.

[0016] In some embodiments, the leakage detection result includes second leakage alarm information; the controller is used to generate second leakage alarm information and send it to the target system after sending the first leakage alarm information and determining that the sensing lines of the two detection circuits are turned on.

[0017] The battery described in the embodiment of the present application sends a first leakage alarm message when the current of one of the two detection circuits is greater than a threshold value, which may result in a false leakage alarm. When the sensing lines of the two detection circuits are turned on, it can be determined that liquid continues to leak, and a second leakage alarm message is generated and sent to the target system, which can reduce the occurrence of false leakage alarms and improve detection accuracy.

[0018] In some embodiments, the controller is used to determine the location information of the liquid leakage point based on the voltage between the second ends of the two detection lines of the detection circuits, the voltage between the second ends of the two detection lines of the detection circuits, and the length of the detection lines; and generate the second liquid leakage alarm information based on the location information.

[0019] The battery described in the embodiment of the present application determines the location information of the liquid leakage point through a controller, generates a second leakage alarm information based on the location information and sends it to the target system, can accurately determine the liquid leakage location, and can provide a leakage point positioning report function, which can improve the work efficiency of leakage point investigation.

[0020] In some embodiments, the sealing surface includes a first sealing area and a second sealing area adjacent to each other, the height of the first sealing area is higher than the height of the second sealing area; and the detection circuit unit is installed in the second sealing area.

[0021] The battery described in the embodiment of the present application has a sealing surface including a first sealing area and a second sealing area in the shape of a step, which can guide the liquid from the first sealing area with a higher height to the second sealing area with a lower height. The detection circuit unit is installed in the second sealing area, which is convenient for the installation of the detection circuit unit and can ensure the sealing effect of the first sealing area, thereby ensuring the reliability of sealing and leakage detection.

[0022] In some embodiments, a transition slope is provided at the junction between the first sealing area and the second sealing area.

[0023] The battery described in the embodiment of the present application can guide the liquid to flow from the first sealing area to the second sealing area by setting a transition slope between the first sealing area and the second sealing area, thereby improving the accuracy and timeliness of liquid leakage detection.

[0024] In some embodiments, the liquid leakage detection module includes: a power supply unit for supplying power to the detection circuit unit and the controller, wherein the power supply unit includes a self-generating power supply unit.

[0025] The battery described in the embodiment of the present application is powered by a power supply unit such as a self-generating power supply unit, and can continuously provide power for detection to ensure the stability of detection.

[0026] In some embodiments, the communication method by which the liquid leakage detection module sends the liquid leakage detection result includes a wireless communication method.

[0027] The battery described in the embodiment of the present application sends the leakage detection result to the target system through wireless communication, without the need for wiring, which facilitates the deployment of the leakage detection module and can ensure the communication quality.

[0028] According to a second aspect of the present disclosure, there is provided an electrical device, comprising: the battery as described above, wherein the battery is used to provide electrical energy.

[0029] According to a third aspect of the present disclosure, a leakage detection method is provided, which is applied to a battery, wherein the battery includes a seal and a leakage detection module, and the leakage detection method is executed in the leakage detection module, including: detecting whether liquid leakage occurs on the sealing surface of the seal; and sending the leakage detection result to a target system when it is determined that liquid leakage occurs on the sealing surface.

[0030] The leakage detection method described in the embodiment of the present application can detect whether liquid leakage occurs at the sealing position where the seal is installed, avoid false alarms caused by condensed water, etc., and improve the accuracy of liquid leakage detection; by sending the leakage detection results to the target system, the liquid leakage detection of the seal can be monitored.

[0031] In some embodiments, the liquid leakage detection module includes a detection circuit unit and a controller, and the detection circuit unit is arranged on the sealing surface of the seal; the leakage detection method is executed in the controller, and the detecting whether the seal has liquid leakage includes: collecting electrical parameters of the detection circuit unit, and determining whether the sealing surface has liquid leakage based on the electrical parameters; when it is determined that the seal has liquid leakage, sending the liquid leakage detection result to the target system includes: when it is determined that the sealing surface has liquid leakage, generating the liquid leakage detection result and sending it to the target system.

[0032] The leakage detection method described in the embodiment of the present application collects the electrical parameters of the detection circuit unit to determine whether liquid leakage occurs on the sealing surface and sends a detection report. It can accurately detect whether liquid leakage occurs on the sealing surface and send the detection results of liquid leakage detection.

[0033] In some embodiments, the detection circuit unit includes at least one detection circuit, each of the detection circuits includes a detection line and a sensing line, the first end of the detection line is connected to the first end of the sensing line, the second end of the detection line and the second end of the sensing line are connected to the controller, and the resistance value per unit length of the sensing line is a constant; collecting the electrical parameters of the detection circuit unit and determining whether liquid leakage occurs on the sealing surface based on the electrical parameters includes: collecting the electrical parameters of the at least one detection circuit, and determining whether liquid leakage occurs on the sealing surface based on the electrical parameters of the at least one detection circuit.

[0034] The leakage detection method described in the embodiment of the present application can accurately detect whether liquid leakage occurs on the sealing surface by collecting electrical parameters detected by the detection circuit, and can provide the ability to locate the position of the leakage point through the induction line.

[0035] In some embodiments, the number of the detection circuits is two, the two detection circuits are installed on the sealing surface, and the sensing lines of the two detection circuits are arranged adjacent to each other; the leakage detection result includes first leakage alarm information, and determining whether liquid leakage occurs on the sealing surface based on the electrical parameters of the at least one detection circuit includes: when the current value of one of the two detection circuits is greater than a current threshold, determining that liquid leakage occurs on the sealing surface; generating the first leakage alarm information and sending it to the target system.

[0036] The leakage detection method described in the embodiment of the present application can detect whether liquid leakage occurs on the sealing surface by generating a first liquid leakage alarm message and sending it to the target system, and can send an alarm message to realize a leakage alarm reminder function.

[0037] In some embodiments, the leakage detection result includes second leakage alarm information, and generating the leakage detection result and sending it to the target system also includes: after sending the first leakage alarm information and determining that the sensing lines of the two detection circuits are turned on, generating the second leakage alarm information and sending it to the target system.

[0038] The leakage detection method described in the embodiment of the present application sends a first leakage alarm message when the current of one of the two detection circuits is greater than a threshold value, which may result in a false alarm of leakage. When the sensing lines of the two detection circuits are turned on, it can be determined that liquid continues to leak, and a second leakage alarm message is generated and sent to the target system, which can reduce the occurrence of false alarms of leakage and improve detection accuracy.

[0039] In some embodiments, the generating of the second liquid leakage alarm information includes: determining the location information of the liquid leakage point based on the voltage between the second ends of the two sensing lines of the detection circuits, the voltage between the second ends of the two sensing lines of the detection circuits, and the length of the sensing lines; and generating the second liquid leakage alarm information based on the location information.

[0040] The leakage detection method described in the embodiment of the present application can accurately determine the liquid leakage location by determining the location information of the liquid leakage point, generating a second leakage alarm message based on the location information and sending it to the target system, and can provide a leakage point positioning report function, thereby improving the work efficiency of leakage point investigation.

[0041] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the instructions are executed by a processor to implement the leakage detection method as described above.

[0042] According to a fifth aspect of the present disclosure, a computer program product is provided, wherein the computer program product stores computer instructions, and the instructions are executed by a processor to implement the leakage detection method as described above.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] By describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present disclosure will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other purposes and advantages of the present disclosure will be further described below in conjunction with specific embodiments and with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding technical features or components will be represented by the same or corresponding figure marks.

[0045] Figure 1 Schematic diagram of modules of some embodiments of the battery disclosed herein;

[0046] Figure 2A Schematic diagram of some embodiments of the battery leakage detection module disclosed in the present invention. Figure 2B Schematic diagrams of modules of other embodiments of the battery leakage detection module disclosed in the present invention;

[0047] Figure 3A is a three-dimensional schematic diagram of some embodiments of the installation detection circuit unit disclosed in the present invention, Figure 3B A schematic top view of some embodiments of installing a detection circuit unit;

[0048] Figure 4 A schematic diagram of setting a transition slope for the seal of the battery disclosed in the present invention;

[0049] Figure 5 Schematic diagrams of other embodiments of the installation detection circuit unit disclosed in the present invention;

[0050] Fig. 6A A schematic diagram of a battery box. Figure 6B is a schematic diagram of a battery box in which the battery disclosed in the present invention is applied, Figure 6C It is a schematic diagram of the transmission of the detection result information;

[0051] Figure 7 The detection circuit unit of the present disclosure includes a schematic diagram of a detection circuit;

[0052] FIG. 8A to FIG. 8E The present invention discloses a detection circuit unit including two detection circuits; wherein: Fig. 8A is a detection schematic diagram of the detection circuit unit when no liquid leakage occurs on the sealing surface; Figure 8B A schematic diagram for detecting that a detection circuit of a detection circuit unit is wetted by liquid; Figure 8C A schematic diagram for detecting that the sensing lines of two detection circuits of a detection circuit unit are wetted by liquid; Fig.8D It is a schematic diagram of an equivalent circuit in which the sensing lines of two detection circuits of the detection circuit unit are wetted by liquid; Fig. 8E A schematic diagram for detecting that another detection circuit of the detection circuit unit is wetted by liquid;

[0053] Fig. 9 Schematic diagram of the flow of some embodiments of the leakage detection method disclosed in the present invention;

[0054] Fig.10 Schematic diagram of the flow chart of other embodiments of the leakage detection method disclosed in the present invention. DETAILED DESCRIPTION

[0055] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0057] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0058] Reference to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least some embodiments of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0061] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0062] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0063] The present disclosure provides a battery 10, which can be a variety of batteries, such as a lithium battery. Figure 1 As shown, the battery 10 includes a seal 11 and a leakage detection module 12. The seal 11 is used to prevent liquid from entering various devices such as a box, and the liquid can be various liquids such as water. The seal 11 can be installed at multiple locations, and the installation location can be determined according to the sealing requirements.

[0064] For example, the battery 10 includes a box body, and the seal 11 can be installed at the connection position of the upper box body and the lower box body of the box body. The seal 11 can be a sealing strip, a sealing gasket or other sealing members, and the material of the seal 11 can be a variety of materials such as rubber.

[0065] The leakage detection module 12 is integrated with the seal 11. The leakage detection module 12 is used to detect whether the seal 11 has liquid leakage, and when it is determined that the seal has liquid leakage, the leakage detection result is sent to the target system. The target system corresponds to the application of the battery 10 and can be a variety of systems. For example, the target system is a BMS (Battery Management System).

[0066] The leakage detection module 12 is used to detect whether the seal 11 has liquid leakage, so that the battery 10 has the ability to detect liquid leakage. It can detect whether the sealing position where the seal 11 is installed has liquid leakage, avoid false alarms due to condensed water, etc., and improve the accuracy of liquid leakage detection; by sending the leakage detection result to the target system, the liquid leakage detection can be monitored.

[0067] The communication method for the leakage detection module 12 to send the leakage detection result can use wired or wireless communication methods. For example, the leakage detection module 12 can send the leakage detection result to the target system through wireless communication methods such as Bluetooth, without wiring, which is convenient for deploying the leakage detection module 12 and can ensure communication quality.

[0068] There are many types of leakage detection modules. Figure 2A As shown, the liquid leakage detection module includes a detection circuit unit 121 and a controller 122, and the detection circuit unit 121 is installed on the sealing surface of the seal 11. The sealing surface of the seal 11 is the surface that contacts the sealing part 11 and the part of the device such as the box body that needs to be sealed, and plays a sealing role, which can prevent liquids such as water from entering the inside of the device such as the box body from the outside.

[0069] The controller 122 is electrically connected to the detection circuit unit 121. The controller 122 collects electrical parameters of the detection circuit unit 121. The electrical parameters may be current, voltage, etc. The controller 122 determines whether liquid leakage occurs on the sealing surface of the seal 11 based on the electrical parameters. If the controller 122 determines that liquid leakage occurs on the sealing surface of the seal 11, a liquid leakage detection result is generated and sent to the target system. The controller 122 may be a variety of controllers.

[0070] By setting a detection circuit unit 121 on the sealing surface of the seal 11, the controller 122 collects the electrical parameters of the detection circuit unit 121 to determine whether liquid leakage occurs on the sealing surface, and can accurately detect whether liquid leakage occurs on the sealing surface; by sending a detection report through the controller 122, the liquid leakage detection of the sealing surface can be monitored.

[0071] like Figure 2B As shown, the leakage detection module 12' includes a detection circuit unit 121, a controller 122 and a power supply unit 123. The power supply unit 123 can be a variety of power supplies, and a variety of power supply methods can be used to power the detection circuit unit 121 and the controller 122. The power supply unit 123 can include a self-generating power supply unit, etc., and the self-generating power supply unit can be a thermocouple self-generating power supply unit, etc.

[0072] If an external power supply is used to power the detection circuit unit 121 and the controller 122, there may be a situation where the power supply cannot be continuously supplied, and the detection stability is poor. By supplying power to the detection circuit unit 121 and the controller 122 through a power supply unit 123 such as a self-generated power supply unit, electric energy can be continuously provided for detection, thereby ensuring the stability of detection.

[0073] The sealing member 11 may have a variety of shapes, such as a ring shape, a strip shape, etc. The following description will be made using a strip-shaped sealing member 11. Figure 3A and Figure 3B As shown, the sealing surface of the sealing member 11 includes adjacent first sealing areas 111 and second sealing areas 112, the height of the first sealing area 111 is higher than the height of the second sealing area 112, and the detection circuit unit 121 is installed in the second sealing area 112. The detection circuit unit 121 can be of various types, for example, the detection circuit unit 121 is a FPC (Flexible Printed Circuit, flexible circuit board).

[0074] The first sealing area 111 is an effective sealing area, and a through hole 113 is provided in the first sealing area 111, and the through hole 113 is used to pass the fastening bolts, etc. The first sealing area 111 mainly plays a sealing role to prevent water and other liquids from entering the box and other devices. The detection circuit unit 121 is installed in the second sealing area 112, which is a sensing area for liquid leakage sensing.

[0075] When liquid leaks from the sealing surface of the seal 11, the leaked liquid can enter the second sealing area 112 through the first sealing area 111; when the liquid flows through the detection circuit unit 121, the electrical parameters of the detection circuit unit 121 change, and the controller can determine that liquid leakage has occurred on the sealing surface based on the change in the electrical parameters of the detection circuit unit 121.

[0076] The height of the first sealing area 111 is higher than that of the second sealing area 112, so as to guide the leaked liquid to flow to the second sealing area 112. The height difference of the second sealing area 112 between the first sealing area 111 can be 0.5-2 mm, for example, the height difference is 1 mm.

[0077] The sealing surface of the seal 11 includes a first sealing area 111 and a second sealing area 112, which can guide the liquid from the first sealing area 111 with a higher height to the second sealing area 112 with a lower height; the detection circuit unit 121 is installed in the second sealing area 112, which is convenient for the installation of the detection circuit unit 121 and can ensure the sealing effect of the first sealing area 111, thereby ensuring the reliability of sealing and leakage detection.

[0078] like Figure 4As shown, a through hole 113 is provided in the first sealing area 111, and the through hole 113 is used to pass a fastening bolt or the like. The distance between the end of the through hole 113 and the edge of the second sealing area 112 is L, and the sealing effect of the first sealing area 111 can be ensured by setting the minimum value of L. L can be 6-10 mm, for example, 8 mm. For example, in an experiment for a seal, when the minimum value of L is controlled at 8 mm ± 0.5 mm, the sealing effect of the first sealing area 111 of the seal can be ensured.

[0079] like Figure 4 As shown, the height of the first sealing area 111 is higher than that of the second sealing area 112, and a transition slope 114 is provided at the junction between the first sealing area 111 and the second sealing area 112. The inclination angle of the transition slope 114 can be 10-45 degrees, for example, 10 degrees. The provision of the transition slope 114 can achieve better drainage. For example, the conventional thickness of the seal is generally 3 mm. Through experiments, when the inclination angle of the transition slope 114 is 10 degrees, the minimum drainage requirement can be met.

[0080] By providing a transition slope 114 between the first sealing area 111 and the second sealing area 112, it is convenient to guide the liquid to flow from the first sealing area 111 to the second sealing area 112, thereby improving the accuracy and timeliness of liquid leakage detection.

[0081] like Figure 5 As shown, the detection circuit unit 121 is an FPC, and a leakage hole 124 is provided on the surface of the FPC. The leakage hole 124 may be a honeycomb through hole, etc., and the FPC may be pasted in the second sealing area 112. The length of the FPC may be set according to the length of the second sealing area 112; the width and thickness of the FPC may be set according to the detection requirements, for example, the width of the FPC is 0.8-1.2 mm, and the width of the FPC is 0.01-0.02 mm. The leaked liquid may enter the FPC through the leakage hole 124 and contact the circuit in the FPC. The size and layout of the leakage hole 124 may be set according to the detection requirements.

[0082] The battery in the embodiment of the present disclosure can be, but is not limited to, applied to a device such as a box, and the box can be a battery box, etc. Fig. 6A and Figure 6B As shown, the battery case includes an upper case 010 and a lower case 020, a first connection portion 011 is provided at the lower edge of the upper case 01, a second connection portion 021 is provided at the upper edge of the lower case 020, and a cavity 022 of the lower case 020 is used to install a battery cell module, etc.

[0083] When the first connection part 011 of the upper box body 010 and the second connection part 021 of the lower box body 020 are connected by bolts, the sealing member of the battery in the embodiment of the present disclosure can be arranged between the first connection part 011 and the second connection part 021 to play a role of waterproofing and sealing.

[0084] A plurality of battery modules are arranged in the cavity 022, and the battery modules may be lithium battery modules, etc. A BMS may be arranged in the cavity 022. The seal 11 may be an annular sealing gasket, and before the first connection part 011 of the upper box 010 and the second connection part 021 of the lower box 020 are connected by bolts, the seal 11 is installed on the second connection part 021; a through hole 113 is arranged on the seal 11, and when the upper box 010 and the lower box 020 are connected by bolts, the bolts pass through the through hole 113, and the seal 11 is used to seal the gap at the connection position of the upper box 010 and the lower box 020 to prevent liquids such as water from entering the upper box 010 and / or the lower box 020.

[0085] The sealing surface of the sealing member 11 is a surface that contacts the first connection portion 011 and performs a sealing function. The sealing surface of the sealing member 11 includes a first sealing area 111 and a second sealing area, and a detection circuit unit 121 is installed on the second sealing area; the controller 122 is electrically connected to the detection circuit unit 121, and the power supply unit 123 supplies power to the detection circuit unit 121 and the controller 122. The controller 122 collects electrical parameters of the detection circuit unit 121 and determines whether the first sealing area 111 is leaking based on the electrical parameters.

[0086] like Figure 6C As shown, when liquid leakage occurs in the first sealing area 111, water or other liquid outside the battery box penetrates into the detection circuit unit 121 installed on the second sealing area through the first sealing gas 111, and the controller 122 determines that liquid leakage occurs based on the change of electrical parameters of the detection circuit unit 121, generates a leakage detection result and sends it to the BMS 03.

[0087] The controller 122 may send the leakage detection result to the BMS 03 by wireless communication such as Bluetooth, and the BMS 03 may transmit the leakage detection result to the vehicle system 04, and the vehicle system 04 may instruct relevant personnel to perform detection and other operations.

[0088] The detection circuit unit may include one or more detection circuits, and the detection circuits may be of various types. Figure 7 As shown, the detection circuit unit includes a detection circuit, which includes a detection line 1211 and a sensing line 1212. The first end of the detection line 1211 is connected to the first end of the sensing line 1212, and the second end of the detection line 1211 and the second end of the sensing line 1212 are connected to the controller 122 to form a detection loop.

[0089] The sensing line 1212 is a uniformly distributed conductor, and the resistance value per unit length of the sensing line 1212 is a constant value. For example, the resistance per centimeter of the sensing line 1212 is a constant value r constant, and r constant corresponds to the material of the sensing line 1212. For sensing lines 1212 of different materials, r constant is different; the detection line 1211 can be a copper wire, etc., and the resistance of the detection line 1211 is close to zero.

[0090] By detecting liquid leakage on the sealing surface through the detection line, it is possible to accurately detect whether liquid leakage occurs on the sealing surface; the ability to locate the position of the leakage point can be provided through the induction line.

[0091] The controller 122 may be electrically connected to one or more detection circuits to determine whether liquid leakage occurs on the sealing surface based on electrical parameters of the one or more detection circuits. Figure 7 As shown, the controller 122 collects electrical parameters of the detection circuit composed of the detection line 1211 and the sensing line 1212. The electrical parameters may be current, etc. The controller 122 may set electrical parameter thresholds corresponding to the electrical parameters, such as current thresholds, etc.; the controller 122 determines whether liquid leakage occurs on the sealing surface based on the electrical parameters.

[0092] For example, the electric signal threshold may be a current threshold. When liquid leakage occurs on the sealing surface of the seal, the liquid leakage connects the detection line 1211 and the sensing line 1212, and when the controller 122 determines that the current of the detection circuit composed of the detection line 1211 and the sensing line 1212 is greater than the current threshold, it is determined that liquid leakage occurs on the sealing surface, and the first liquid leakage alarm information is generated and sent to the target system.

[0093] In some embodiments, the number of detection circuits is two; the two detection circuits are installed on the sealing surface, and the induction lines of the two detection circuits are arranged adjacent to each other. For example, the detection circuit unit is an FPC, and the FPC includes two detection circuits, and the two detection circuits have a total of four wires. The gap between the wires can be 1mm-2mm, which can ensure the sensitivity of the detection and avoid false alarms; the four wires are wrapped in resin material to protect the four wires; the surface of the FPC is a film with honeycomb through holes, and the honeycomb through holes are set to allow the leaked liquid to contact the wires. The size and hole spacing of the honeycomb through holes can be determined based on experiments.

[0094] By installing two detection circuits on the sealing surface, the sealing surface is tested for liquid leakage, which can accurately detect whether liquid leakage occurs on the sealing surface and locate the leakage point.

[0095] like Fig. 8AAs shown, the first detection circuit includes a detection line 1213 and a sensing line 1214, and the first end A1 of the detection line 1213 is connected to the first end B1 of the sensing line 1214; the second end A2 of the detection line 1211 and the second end B2 of the sensing line 1214 are connected to the controller 122 to form a first loop. A voltage can be applied to the second end A2 of the detection line 1211 and the second end B2 of the sensing line 1214 through the power supply unit and the controller 122, for example, the applied voltage is 5V.

[0096] The second detection circuit includes a detection line 1216 and a sensing line 1215, and the sensing line 1214 and the sensing line 1215 are arranged adjacent to each other; the first end D1 of the detection line 1216 is connected to the first end C1 of the sensing line 1215; the second end D2 of the detection line 1216 and the second end C2 of the sensing line 1215 are respectively connected to the controller 122 to form a second loop; a voltage can be applied to the second end D2 of the detection line 1216 and the second end C2 of the sensing line 1215 through the power supply unit and the controller 122, for example, the applied voltage is 5V.

[0097] The controller 122 detects electrical parameters of the first detection circuit and the second detection circuit respectively, and the electrical parameters may be current, etc. In the case that no liquid leakage occurs on the sealing surface, there is no liquid leaking from the outside on the sealing surface, and the current 1 of the first detection circuit detected by the controller 122 is the ratio of the 5V voltage to the total resistance of the first detection circuit, and the current 2 of the second detection circuit detected by the controller 122 is the ratio of the 5V voltage to the total resistance of the second detection circuit.

[0098] Since the total resistance of the first detection circuit is substantially the same as or slightly different from the total resistance of the second detection circuit, the current 1 and the current 2 are also substantially the same or slightly different. The controller 122 can pre-set a current threshold, and when it is determined that both the current 1 and the current 2 are less than the current threshold, it is determined that no liquid leakage occurs on the sealing surface, and the current threshold can be set according to experimental data.

[0099] The leakage detection result includes the first leakage alarm information, etc.; when the electrical parameter of one of the first detection circuit and the second detection circuit is greater than the electrical parameter threshold, the controller 122 determines that liquid leakage occurs on the sealing surface, generates the first leakage alarm information and sends it to the target system.

[0100] For example, Figure 8B As shown, when external liquid leaks from the sealing surface, when the liquid penetrates into the sealing surface and soaks the first detection circuit, the liquid short-circuits the detection line 1213 and the sensing line 1214 of the first detection circuit, causing the total resistance of the first detection circuit to change and the current of the first detection circuit to increase significantly.

[0101] When the current of the first detection circuit is greater than the current threshold, the controller 122 determines that liquid leakage occurs on the sealing surface, generates first liquid leakage alarm information, and sends it to the target system. When the electrical parameter of one of the two detection circuits is greater than the electrical parameter threshold, the controller 122 generates first liquid leakage alarm information and sends it to the target system, so as to detect whether liquid leakage occurs on the sealing surface and send alarm information, thereby realizing the leakage alarm reminder function.

[0102] The resistance per unit length of the sensing line of the first detection circuit is a constant, and the resistance of the sensing line of the first detection circuit is usually close to 0; when the current of the first detection circuit is greater than the current threshold, the controller 122 detects the voltage and current of the first detection circuit, and by calculating the quotient of this voltage and this current, the resistance value corresponding to the first detection circuit can be determined; by calculating the quotient of this resistance value and the resistance per unit length of the sensing line, the length of the sensing line can be obtained, and this length of the sensing line can be regarded as the distance between the position where the first detection circuit is soaked by liquid and the controller 122, and the position where the liquid leakage occurs can be determined based on this sensing line length.

[0103] like Figure 8C As shown, after the liquid penetrates into the sealing surface and soaks the first detection circuit, the liquid can continue to flow. When the liquid flows between the first detection circuit and the second detection circuit, the first detection circuit and the second detection circuit are soaked by the liquid, and the liquid short-circuits the sensing line 1214 and the sensing line 1215, making the sensing line 1214 and the sensing line 1215 conductive.

[0104] The first liquid leakage alarm information sent by the controller 122 may be a false alarm information. The liquid leakage detection result includes the second liquid leakage alarm information. After sending the first liquid leakage alarm information and determining that the sensing line 1214 and the sensing line 1215 are connected, the controller 122 generates the second liquid leakage alarm information and sends it to the target system. When the sensing lines of the two detection lines are connected, it can be determined that there is continued leakage of liquid. The controller 122 generates the second liquid leakage alarm information and sends it to the target system, which can reduce the occurrence of false alarms of liquid leakage and improve the detection accuracy.

[0105] The controller 122 may also generate a second leakage alarm message and send it to the target system after sending the first leakage alarm message and determining that the voltage change of the second detection circuit exceeds a voltage change threshold. The voltage change threshold may be set according to the result of the leakage detection experiment.

[0106] The controller 122 can determine the location information of the liquid leakage point based on the voltage between the second end B2 of the sensing line 1214 and the second end C2 of the sensing line 1215, the voltage between the second end A2 of the detection line 1213 and the second end D2 of the detection line 1216, and the lengths of the sensing line 1214 and the sensing line 1215; the controller 122 generates second liquid leakage alarm information based on the location information and sends it to the target system.

[0107] The controller 122 determines the location information of the liquid leakage point, generates a second leakage alarm message based on the location and sends it to the target system, which can accurately determine the liquid leakage location and provide a leakage point positioning report function, thereby improving the efficiency of leakage point investigation.

[0108] The controller 122 is provided with a plurality of detection circuits or detection units to detect whether the sensing line 1214 and the sensing line 1215 are conductive, and when it is determined that the sensing line 1214 and the sensing line 1215 are conductive, the controller 122 calculates the short circuit point, i.e., the location information of the liquid leakage, according to the resistance-voltage distribution relationship.

[0109] When the liquid soaks the sensing line 1214 and the sensing line 1215, the wetting points E1 and E2 of the liquid divide the sensing line 1214 or the sensing line 1215 into two parts, and the original parallel circuit becomes a series circuit; the series circuit includes two circuits, the first circuit is: B2-E1-E2-C2; the second circuit is: A2-A1-B1-E1-E2-C1-D1-D2, and these two circuits are regarded as connected in series.

[0110] The controller 122 can detect the voltage of the first circuit B2-E1-E2-C2 and the voltage of the second circuit A2-A1-B1-E1-E2-C1-D1-D2, and determine the resistance ratio of the first circuit B2-E1-E2-C2 and the second circuit A2-A1-B1-E1-E2-C1-D1-D2 based on the voltage ratio of the first circuit B2-E1-E2-C2 and the second circuit A2-A1-B1-E1-E2-C1-D1-D2.

[0111] The sensing line 1214 has the same length as the sensing line 1215, and the resistance per unit length of the sensing line 1214 and the sensing line 1215 is a constant value. The resistance of the detection line 1213 and the detection line 1216 is usually close to 0. The length ratio of the two parts of the sensing line 1214 (or the sensing line 1215) can be determined according to the resistance ratio of the first circuit B2-E1-E2-C2 and the second circuit A2-A1-B1-E1-E2-C1-D1-D2. For example, the length ratio between the length of the B2-E1 part and the length of the E1-B1 part in the sensing line 1214 is determined, and the location information of the liquid leakage point can be determined based on this length ratio.

[0112] When the liquid wets the sensing line 1214 and the sensing line 1215, the simplified circuits of the two detection lines are as follows Fig.8D As shown, RA0 is the resistance of the first circuit B2-E1-E2-C2, and RB0 is the resistance of the second circuit A2-A1-B1-E1-E2-C1-D1-D2. The ratio of RA0 to RB0 is 1:1, so the length ratio between the length of the B2-E1 portion and the length of the E1-B1 portion in the sensing line 1214 is determined to be 1:1, and the position of the liquid leakage point is determined to be the center position of the sensing line 1214.

[0113] In some embodiments, when the controller 122 detects that the current value detected by one of the two detection circuits is greater than the current threshold, it is determined that liquid such as water causes a short circuit between the sensing line and the detection line of this detection circuit, and a first liquid leakage alarm message is generated and sent to the BMS. This first liquid leakage alarm message is a first-level alarm message, which is a primary alarm and realizes a reminder function. The first-level alarm message may also be a false alarm message.

[0114] If a real liquid leak occurs, there will usually be continuous liquid leakage at the leaking location. After sending the first liquid leakage alarm information, the controller 122 determines that the sensing lines of the two detection circuits are connected, and then determines that the liquid such as water has changed the circuits of the two detection circuits. According to the resistance voltage distribution relationship, the location information of the liquid leakage point is calculated, thereby triggering an alarm, generating a second liquid leakage alarm information, and sending it to the target system. This second liquid leakage alarm information is a secondary alarm information.

[0115] A variety of other methods can be used to determine the location information of the liquid leakage point. For example, the resistance per unit length of the sensing line of the first detection circuit and the second detection circuit are both constant values, and the resistance of the sensing line of the first detection circuit and the second detection circuit is usually close to 0; the controller 122 can detect the voltage and current of the first circuit B2-E1-E2-C2, and by calculating the quotient of the current and the voltage, the resistance of the first circuit B2-E1-E2-C2 can be obtained, and by calculating the quotient of this resistance value and the resistance per unit length of the sensing line, the total length of the sensing line B2-E1 and the sensing line E2-C2 can be obtained (the length of the sensing line B2-E1 and the length of the sensing line E2-C2 can be regarded as the same), and half of this total length is used as the length of the sensing line B2-E1 and the length of the sensing line E2-C2. The length of the sensing line B2-E1 and the length of the sensing line E2-C2 can be regarded as the distance between the position where the liquid is soaked and the controller 122, and the position where the liquid leakage occurs can be determined.

[0116] The second leakage alarm information is a secondary alarm signal that can be located. The second leakage alarm information is transmitted to the BMS, and the BMS transmits the second leakage alarm information to the vehicle controller, so that relevant personnel can determine the leakage location and perform corresponding inspections, repairs and other operations, which can improve the work efficiency of leakage point detection.

[0117] like Fig. 8E As shown, when the first detection circuit and the second detection circuit are soaked with liquid, the liquid can continue to flow. When the liquid soaks the second detection circuit, the detection line 1216 and the sensing line 1215 are short-circuited, so that the total resistance of the second detection circuit changes, and the current of the second detection circuit increases significantly. When the current of the second detection circuit of the controller 122 is greater than the current threshold, since the controller 122 has sent the leakage alarm information, the second leakage alarm information, etc., the controller 122 can send the leakage alarm information or other indication information to the BMS, or it may not send information to the BMS.

[0118] In some embodiments, the present disclosure provides an electrical device, including a battery as in any of the above embodiments, wherein the battery is used to provide electrical energy; the electrical device may be a car, etc.

[0119] In some embodiments, the present disclosure provides a leakage detection method, which is applied to a battery in any of the above embodiments. The battery includes a seal and a leakage detection module, and the leakage detection method is executed in the leakage detection module. Fig. 9 Schematic diagram of some embodiments of the leakage detection method disclosed in the present invention. Fig. 9 As shown:

[0120] Step S901, detecting whether the sealing element has liquid leakage.

[0121] Step S902: When it is determined that the sealing element has liquid leakage, a liquid leakage detection result is sent to the target system.

[0122] The liquid leakage detection module includes a detection circuit unit and a controller. The detection circuit unit is arranged on the sealing surface of the seal. The electrical parameters of the detection circuit unit are collected, and whether liquid leakage occurs on the sealing surface is determined based on the electrical parameters. If liquid leakage occurs on the sealing surface, a liquid leakage detection result is generated and sent to the target system.

[0123] The detection circuit unit includes at least one detection circuit, each detection circuit includes a detection line and a sensing line, a first end of the detection line is connected to a first end of the sensing line, a second end of the detection line and a second end of the sensing line are connected to a controller, and a resistance value per unit length of the sensing line is a constant value. An electrical parameter detected by at least one detection circuit is collected, and whether liquid leakage occurs on the sealing surface is determined based on the electrical parameter of at least one detection circuit.

[0124] In some embodiments, two detection circuits are installed on the sealing surface, and the induction lines of the two detection circuits are arranged adjacently; the leakage detection result includes a first leakage alarm message and a second leakage alarm message. When the current value of one of the two detection circuits is greater than the current threshold, it is determined that liquid leakage occurs on the sealing surface; the first leakage alarm message is generated and sent to the target system; when the first leakage alarm message is sent and it is determined that the induction lines of the two detection circuits are turned on, the second leakage alarm message is generated and sent to the target system.

[0125] Fig.10 Schematic diagram of the flow chart of other embodiments of the leakage detection method disclosed in the present invention, such as Fig.10 As shown:

[0126] Step S1001: When the value of the electrical parameter of one of the two detection circuits is greater than the electrical parameter threshold, it is determined that liquid leakage occurs on the sealing surface.

[0127] Step S1002: Generate first liquid leakage alarm information and send it to the target system.

[0128] Step S1003, after sending the first liquid leakage alarm information and determining that the sensing lines of the two detection circuits are turned on, determine the location information of the liquid leakage point based on the voltage between the second ends of the sensing lines of the two detection circuits, the voltage between the second ends of the sensing lines of the two detection circuits, and the length of the sensing lines.

[0129] Step S1004: Generate second liquid leakage alarm information based on the position information and send it to the target system.

[0130] In some embodiments, the present disclosure provides a computer-readable storage medium storing computer instructions, and the instructions are executed by a processor to perform the leakage detection method in any of the above embodiments.

[0131] Computer readable storage media can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive enumeration) of readable storage media can include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0132] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0133] The embodiments of the present disclosure may also be a computer program product, which includes computer program instructions. When the computer program instructions are executed by a processor, the processor executes the steps of the leakage detection method according to various embodiments of the present disclosure described in the above “Exemplary Method” section of this specification.

[0134] The steps of the method of the present disclosure are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present disclosure may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

[0135] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery comprising: Upper box and lower box; A sealing member is arranged between a first connecting portion located at the lower edge of the upper box and a second connecting portion located at the upper edge of the lower box, wherein a sealing surface of the sealing member is a surface in contact with the first connecting portion and performs a sealing function, and the sealing surface includes a first sealing area and a second sealing area adjacent to each other, and a height of the first sealing area is higher than a height of the second sealing area; Leakage detection module, including: A detection circuit unit, comprising two detection circuits installed in the second sealing area, wherein the detection circuit comprises a detection line and a sensing line; a first end of the detection line is connected to a first end of the sensing line; a controller, electrically connected to the second end of the detection line and the second end of the sensing line, respectively, for collecting electrical parameters of the two detection lines, and determining whether liquid leakage occurs on the sealing surface based on the electrical parameters; and generating a liquid leakage detection result and sending it to a target system when it is determined that liquid leakage occurs on the sealing surface; A power supply unit is used to supply power to the detection circuit unit and the controller.

2. The battery according to claim 1, wherein The resistance per unit length of the sensing line is a constant value.

3. The battery according to claim 2, wherein The sensing lines of the two detection circuits are arranged adjacent to each other.

4. The battery according to claim 3, wherein The liquid leakage detection result includes first liquid leakage alarm information; The controller is used to determine that liquid leakage occurs on the sealing surface when the current value of one of the two detection circuits is greater than a current threshold, generate the first liquid leakage alarm information and send it to the target system.

5. The battery according to claim 4, wherein The liquid leakage detection result includes second liquid leakage alarm information; The controller is used for generating the second liquid leakage alarm information and sending it to the target system when the first liquid leakage alarm information is sent and it is determined that the sensing lines of the two detection circuits are turned on.

6. The battery according to claim 5, wherein The controller is used to determine the position information of the liquid leakage point based on the voltage between the second ends of the sensing wires of the two detection circuits, the voltage between the second ends of the sensing wires of the two detection circuits, and the length of the sensing wires; The second liquid leakage alarm information is generated based on the position information.

7. The battery according to claim 1, wherein A transition slope is provided at the junction between the first sealing area and the second sealing area.

8. The battery according to claim 1, wherein The power supply unit includes a self-generating power supply unit.

9. The battery according to any one of claims 1 to 8, wherein The communication method in which the liquid leakage detection module sends the liquid leakage detection result includes a wireless communication method.

10. An electrical device, comprising: The battery according to any one of claims 1 to 9, which is used to provide electrical energy.

11. A leakage detection method, applied to a battery, wherein: The battery comprises an upper box, a lower box, a seal and a leakage detection module, wherein the seal is arranged between a first connection portion located at the lower edge of the upper box and a second connection portion located at the upper edge of the lower box, wherein a sealing surface of the seal is a surface in contact with the first connection portion and performs a sealing function, and the sealing surface comprises a first sealing area and a second sealing area adjacent to each other, and the height of the first sealing area is higher than the height of the second sealing area; the leakage detection module comprises a detection circuit unit, a controller and a power supply unit; the detection circuit unit comprises two detection circuits installed in the second sealing area, and the detection circuit comprises a detection line and a sensing line; a first end of the detection line is connected to a first end of the sensing line; the controller is electrically connected to a second end of the detection line and a second end of the sensing line respectively; the power supply unit is used to supply power to the detection circuit unit and the controller; the leakage detection method is executed in the controller, and comprises: Collecting electrical parameters of the two detection circuits, and determining whether liquid leakage occurs on the sealing surface based on the electrical parameters; When it is determined that liquid leakage occurs on the sealing surface, a liquid leakage detection result is generated and sent to the target system.

12. The leakage detection method according to claim 11, wherein: The resistance per unit length of the sensing line is a constant value.

13. The leakage detection method according to claim 12, wherein: The sensing lines of the two detection circuits are arranged adjacent to each other; the leakage detection result includes first leakage alarm information, and the determining whether liquid leakage occurs on the sealing surface based on the electrical parameters of at least one detection circuit includes: When the current value of one of the two detection circuits is greater than the current threshold, it is determined that liquid leakage occurs on the sealing surface; The generating the leakage detection result and sending it to the target system comprises: The first liquid leakage alarm information is generated and sent to the target system.

14. The leakage detection method according to claim 13, wherein: The liquid leakage detection result includes second liquid leakage alarm information; The generating the leakage detection result and sending it to the target system comprises: When the first liquid leakage alarm information is sent and it is determined that the sensing lines of the two detection circuits are turned on, second liquid leakage alarm information is generated and sent to the target system.

15. The leakage detection method according to claim 14, wherein: The generating of the second liquid leakage alarm information comprises: Determine the position information of the liquid leakage point based on the voltage between the second ends of the sensing wires of the two detection circuits, the voltage between the second ends of the sensing wires of the two detection circuits, and the length of the sensing wires; The second liquid leakage alarm information is generated based on the position information.

16. A computer-readable storage medium storing computer instructions, wherein the instructions are executed by a processor according to any one of claims 11 to 15. 。 17. A computer program product, wherein the computer program product stores computer instructions, wherein the instructions are executed by a processor to implement the leakage detection method according to any one of claims 11 to 15.

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