Battery pack, electric device, failure detection method and storage medium

Abstract

The embodiment of the invention provides a battery pack, a power utilization device, a failure detection method, a storage medium and a program product, and relates to the technical field of batteries. The failure detection module is used for detecting whether the sealing element fails or not; and sending a failure detection result to a target system under the condition of determining that the sealing element fails. According to the invention, the battery pack has the capability of detecting the failure of the sealing element, whether the sealing element installed at the sealing position fails or not can be automatically and accurately detected, the efficiency of failure detection is improved, and the use safety of the sealing element can be improved; and the functions of early warning and the like can be provided when the sealing element fails.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack, an electrical device, a failure detection method, a storage medium, and a program product. Background Technology

[0002] Battery packs are installed in electric vehicles and other electrical devices. During operation, these devices may come into contact with liquids such as water. If water or other liquids enter the battery pack's casing, it can easily cause a short circuit and fire, or even an explosion. To seal the gaps at the connection between the casing and the cover, gaskets or other sealing components are installed to prevent water and other liquids from entering the battery pack. These sealing components are typically made of rubber or similar materials. During use, these seals are affected by environmental factors, undergoing physical and chemical changes, leading to aging and eventual failure. This affects their waterproofing and other performance properties, allowing water and other liquids to enter the battery pack. However, current failure detection methods rely solely on manual inspection of the seal's appearance or checking its manufacturing date, resulting in low accuracy. Summary of the Invention

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

[0004] In some embodiments, according to a first aspect of the present disclosure, a battery pack is provided, comprising: a seal; a failure detection module for detecting whether the seal has failed; and, if it is determined that the seal has failed, sending a failure detection result to a target system.

[0005] The battery pack described in this application embodiment detects whether the seal has failed through a failure detection module, enabling the battery pack to detect seal failures automatically and accurately. This improves the efficiency of failure detection and enhances the safety of the seal. By sending the failure detection results to the target system, it can provide early warning functions when the seal fails.

[0006] In some embodiments, the failure detection module includes: a strain gauge, a detection circuit unit, and a controller; the strain gauge is mounted on the sealing surface of the seal and is used to sense pressure, and the resistance of the strain gauge changes based on the change in pressure; the strain gauge is electrically connected to the controller through the detection circuit unit; the controller is used to acquire the electrical parameters of the detection circuit unit, determine whether the sealing surface has failed based on the electrical parameters; if the sealing surface is determined to have failed, the controller generates the failure detection result and sends it to the target system.

[0007] The battery pack described in this application embodiment uses strain gauges on the sealing surface of the seal to sense pressure. The controller collects electrical parameters of the detection circuit unit to determine whether the sealing surface has failed and sends a detection report. It can automatically and accurately detect whether the sealing surface has failed and can provide early warning functions when the sealing surface fails.

[0008] In some embodiments, the electrical parameters include current; the controller is configured to acquire the current of the detection circuit unit and determine whether the sealing surface has failed based on the current; if the current is less than a current threshold, the sealing surface is determined to have failed, wherein the resistance of the strain gauge increases as the pressure decreases.

[0009] The battery pack described in this application uses a controller to determine whether the sealing surface has failed based on the current of the detection circuit unit. This allows for accurate detection of sealing surface failure using the current of the detection circuit unit. By utilizing the characteristic that the resistance of a strain gauge increases when the pressure decreases, and by setting a current threshold, sealing surface failure is determined when the current of the detection circuit unit is less than the current threshold. This allows for accurate detection of sealing surface failure.

[0010] In some embodiments, the number of strain gauges is multiple, and the multiple strain gauges are connected in parallel to the detection circuit unit.

[0011] The battery pack described in this application embodiment, by setting multiple strain gauges on the sealing surface and connecting the multiple strain gauges in parallel to the detection circuit unit, can perform failure detection at multiple locations on the sealing surface, thereby improving the accuracy of failure detection.

[0012] In some embodiments, a plurality of through holes are provided on the sealing surface; the strain gauge is positioned on the sealing surface between two adjacent through holes. The battery pack described in this application, by placing a strain gauge between two adjacent through holes on the sealing surface, can perform failure detection at locations on the sealing surface experiencing lower pressure, thereby improving the accuracy of failure detection.

[0013] In some embodiments, the seal includes a gasket; the sealing surface includes the top surface of the gasket, the detection circuit unit is mounted on the side of the gasket, and the strain gauge is electrically connected to the detection unit, wherein the strain gauge includes a thin-film pressure sensor.

[0014] The battery pack described in this application improves the safety of the sealing gasket by providing strain gauges such as thin-film pressure sensors on the sealing surface, and installing a detection circuit unit on the side of the sealing gasket. By detecting whether the sealing gasket has failed, the safety of the sealing gasket can be improved.

[0015] In some embodiments, the failure detection module includes a power supply unit for supplying power to the strain gauge, the detection circuit unit, and the controller, wherein the power supply unit includes a self-generated power supply unit.

[0016] The battery pack described in this application embodiment is powered by a power supply unit such as a self-generating power supply unit, which can continuously provide power for the detection and ensure the stability of the detection.

[0017] In some embodiments, the failure detection module sends the failure detection result via wireless communication.

[0018] The battery pack described in this application embodiment transmits the failure detection results to the target system via wireless communication, eliminating the need for wiring, facilitating the deployment of the failure detection module, and ensuring communication quality.

[0019] According to a second aspect of this disclosure, an electrical device is provided, comprising: a battery pack as described above, wherein the battery is used to provide electrical energy.

[0020] According to a third aspect of this disclosure, a failure detection method is provided, applied in a battery pack, wherein the battery pack includes a seal and a failure detection module, and the failure detection method is executed in the failure detection module, including: detecting whether the seal has failed; and if it is determined that the seal has failed, sending a failure detection result to a target system.

[0021] The failure detection method described in this application can automatically and accurately detect whether a seal installed at a sealing position has failed, improve the efficiency of failure detection, enhance the safety of seal use, and provide early warning functions when a seal fails.

[0022] In some embodiments, the failure detection module includes: a strain gauge, a detection circuit unit, and a controller; the strain gauge is mounted on the sealing surface of the seal and is used to sense pressure, and the resistance of the strain gauge changes based on the change in pressure; the strain gauge is electrically connected to the controller through the detection circuit unit; the leakage detection method is executed in the controller, and detecting whether the seal has failed includes: acquiring electrical parameters of the detection circuit unit and determining whether the sealing surface has failed based on the electrical parameters; and sending the failure detection result to the target system when the seal has failed includes: generating the failure detection result and sending it to the target system when the sealing surface has failed.

[0023] The failure detection method described in this application uses strain gauges to sense pressure on the sealing surface of the seal and collects electrical parameters of the detection circuit unit to determine whether the sealing surface has failed and sends a detection report. It can automatically and accurately detect whether the sealing surface has failed and can provide early warning functions when the sealing surface fails.

[0024] In some embodiments, the electrical parameters include current; the step of acquiring the electrical parameters of the detection circuit unit and determining whether the sealing surface has failed based on the electrical parameters includes: acquiring the current of the detection circuit unit and determining whether the sealing surface has failed based on the current.

[0025] The failure detection method described in this application can determine whether the sealing surface has failed based on the current of the detection circuit unit, and can accurately detect whether the sealing surface has failed.

[0026] In some embodiments, determining whether the sealing surface has failed based on the current includes: determining that the sealing surface has failed when the current is less than a current threshold, wherein the resistance of the strain gauge increases as the pressure decreases.

[0027] The failure detection method described in this application, by setting a current threshold, determines that the sealing surface has failed when the current of the detection circuit unit is less than the current threshold, and can accurately detect whether the sealing surface has failed.

[0028] According to a fourth aspect of this disclosure, a computer-readable storage medium is provided that stores computer instructions which are executed by a processor using the failure detection method described above.

[0029] According to a fifth aspect of this disclosure, a computer program product is provided, the computer program product storing computer instructions, the instructions being executed by a processor using the failure detection method described above.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] The above and other objects, features, and advantages of this disclosure will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other objects and advantages of this disclosure will be further described below with reference to specific embodiments and the accompanying drawings. In the drawings, the same or corresponding technical features or components will be represented by the same or corresponding reference numerals.

[0032] Figure 1 The diagram shows some module schematics of embodiments of the battery pack disclosed herein;

[0033] Figure 2A The diagram shows some embodiments of the battery pack failure detection module of this disclosure. Figure 2B The following are schematic diagrams of other embodiments of the battery pack failure detection module of this disclosure;

[0034] Figure 3A A three-dimensional schematic diagram showing a seal with strain gauges and a detection circuit unit installed. Figure 3B A top view of the seal with strain gauges and detection circuitry installed.

[0035] Figure 4A This is a schematic diagram of the battery pack casing. Figure 4B A schematic diagram showing the installation of seals and a failure detection module in the battery pack housing;

[0036] Figure 5 This is a schematic diagram illustrating the transmission of failure detection results;

[0037] Figure 6 This is a schematic diagram of the equivalent circuit of the failure detection module including multiple strain gauges disclosed herein;

[0038] Figure 7 This is a flowchart illustrating some embodiments of the failure detection method disclosed herein. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least some of the embodiments of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0044] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0045] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0047] This disclosure provides a battery pack 10, which can be of various types, such as a lithium battery pack. Figure 1 As shown, the battery pack 10 includes a seal 11 and a failure detection module 12. The seal 11 is used to prevent liquid from entering the housing and other devices. The liquid can be water or other liquids, and the seal 11 can be installed in multiple locations.

[0048] For example, the battery pack 10 includes a housing, and a seal 11 can be installed at the connection between the upper and lower housings. The seal 11 can be a sealing strip, a sealing gasket, or other types of seals, and the material of the seal 11 can be rubber or other materials. During use, the seal 11 is affected by environmental factors, resulting in aging and eventual failure, which affects its waterproof and other performance characteristics.

[0049] The failure detection module 12 can be integrated with the seal 11. The failure detection module 12 is used to detect whether the seal 11 has failed. If the failure detection module 12 determines that the seal has failed, it sends the failure detection result to the target system. The failure detection result includes information indicating that the seal 11 has failed. The target system corresponds to the application of the battery pack 10 and can be various systems, such as a BMS (Battery Management System).

[0050] The failure detection module 12 detects whether the seal 11 has failed, enabling the battery pack to detect seal failure. It can automatically and accurately detect whether the seal 11 installed at the sealing position has failed, thus improving the safety of the seal. By sending the failure detection results to the target system, it can provide early warning and other functions when the seal 11 fails.

[0051] The failure detection module 12 can transmit failure detection results via wired or wireless communication. For example, the failure detection module 12 can send the failure detection results to the target system via wireless communication such as Bluetooth. By using wireless communication to transmit failure detection results, the failure detection module 12 eliminates the need for wiring, facilitating its deployment and ensuring communication quality.

[0052] The failure detection module can be of various types used to detect whether the seal 11 has failed. For example... Figure 2A As shown, the failure detection module includes a strain gauge 121, a detection circuit unit 122, and a controller 123. The strain gauge 121 can be installed in different positions according to different detection requirements. For example, the strain gauge 121 can be installed on the sealing surface of the seal 11. The sealing surface of the seal 11 is the surface that contacts the part of the device such as the housing that needs to be sealed and performs the sealing function. By having the sealing surface in contact with the part that needs to be sealed, liquids such as water can be prevented from entering the interior of the device such as the housing from the outside.

[0053] The strain gauge 121 can be of various types, such as a resistive strain gauge. The strain gauge 121 is used to sense pressure, and its resistance changes based on the pressure change. The strain gauge 121 is electrically connected to the controller 123 via a detection circuit unit 122. The detection circuit unit 122 includes detection lines, and can connect the strain gauge 121 and the controller 123 using various connection methods to form a detection loop.

[0054] The controller 123 acquires the electrical parameters of the detection circuit unit 122, which can be current, voltage, etc. The controller 123 determines whether the sealing surface has failed based on the electrical parameters. If the sealing surface is determined to have failed, the controller 123 generates a failure detection result and sends it to the target system. The controller 123 can be a variety of controllers.

[0055] By setting a strain gauge 121 that senses pressure on the sealing surface of the seal 11, and by collecting the electrical parameters of the detection circuit unit 122 through the controller 123, the seal surface is determined to have failed and a detection report is sent. This system can automatically and accurately detect whether the sealing surface has failed and can provide early warning when the sealing surface fails.

[0056] like Figure 2B As shown, the failure detection module 12' includes a strain gauge 121, a detection circuit unit 122, a controller 123, and a power supply unit 124. The power supply unit 124 can be powered by various power sources and can employ various power supply methods to power the detection circuit unit 122, controller 123, etc. The power supply unit 124 may include a self-generating power supply unit, such as a thermocouple self-generating power supply unit.

[0057] If an external power supply is used to power the detection circuit unit 122, controller 123, etc., there may be situations where the power supply cannot be continuous, resulting in poor detection stability. By using a power supply unit 124, such as a self-generating power supply unit, to power the detection circuit unit 122 and controller 123, a continuous power supply can be provided for detection, ensuring detection stability.

[0058] The seal 11 can have various shapes, such as annular or strip-shaped. The following description uses a portion of a strip-shaped seal 11 as an example; the seal 11 can be a gasket, etc. The sealing surfaces to be inspected include the top surface of the gasket, etc. Figure 3A and Figure 3B As shown, the seal 11 includes a sealing surface 111, on which a through hole 112 is provided. The through hole 112 is used to pass through fastening bolts, etc. The sealing surface 111 mainly serves a sealing function to prevent liquids such as water from entering the housing or other devices.

[0059] Strain gauge 121 is mounted on sealing surface 111. Strain gauge 121 includes a thin-film pressure sensor, etc., and can have multiple mounting positions. Detection circuit unit 122 can also have multiple mounting positions, for example, such as... Figure 3A As shown, the detection circuit unit 122 is installed on the side of the seal 11 and is electrically connected to the strain gauge 121. The detection circuit unit 122 can be installed on the side of the seal 11 by means of adhesive bonding, etc., so that the detection circuit unit 122 is easy to install.

[0060] like Figure 3B As shown, the detection circuit unit 122 can also be installed on the sealing surface 111 of the seal 11. The detection circuit unit 122 can be a variety of circuit units, such as an FPC (Flexible Printed Circuit), etc. The detection circuit unit 122 includes a detection line 1221 (for example, the detection line 1221 is a connecting bus, etc., and the connecting bus can include two wires, positive and negative).

[0061] Seals and failure detection modules can be, but are not limited to, installed in the battery pack housing, etc. For example... Figure 4A As shown, the battery pack housing includes an upper housing 010 and a lower housing 020. The lower edge of the upper housing 010 is provided with a first connecting part 011, and the upper edge of the lower housing 020 is provided with a second connecting part 021. The cavity 022 of the lower housing 020 is used to install battery cell modules, etc.

[0062] With the first connecting part 011 of the upper housing 010 and the second connecting part 021 of the lower housing 020 connected by bolts, a sealing element can be placed between the first connecting part 011 and the second connecting part 021 to serve as a waterproof and sealing element.

[0063] like Figure 4B As shown, multiple battery cell modules are arranged within the cavity 022, and these battery cell modules can be lithium battery cell modules, etc. A BMS 03 can be installed within the cavity 022. The sealing element 11 can be an annular sealing gasket, and the material can be rubber, etc.; the sealing surface 111 of the sealing element 11 is the surface that contacts the first connecting part 011 and performs a sealing function.

[0064] Before the first connecting part 011 of the upper housing 010 and the second connecting part 021 of the lower housing 020 are connected by bolts, the sealing member 11 is bonded to the second connecting part 021 by adhesive. Multiple through holes may be provided on the sealing surface; for example, a row of through holes 112 may be provided on the sealing member 11. When the upper housing 010 and the lower housing 020 are connected by bolts, the bolts pass through the through holes 112, and the sealing member 11 seals the gap at the connection point between the upper housing 010 and the lower housing 020, preventing liquids such as water from entering the upper housing 010 and / or the lower housing 020.

[0065] The strain gauges are positioned on the sealing surface at locations including between two adjacent through holes among the plurality of through holes. For example, a plurality of strain gauges 121 are mounted on the sealing surface 111 of the seal 11, and at least one strain gauge 121 is provided between two adjacent through holes among the plurality of through holes 112.

[0066] The position between two adjacent through holes in the plurality of through holes on the sealing surface 111 is a position where the sealing surface is subjected to lower pressure, and failure is likely to occur at this position. Placing the strain gauge 121 between two adjacent through holes in the plurality of through holes on the sealing surface 111 can improve the accuracy of failure detection and reduce the impact on the sealing effect of the sealing surface.

[0067] The detection circuit unit 122 can also be disposed on the sealing surface 111. A recessed platform can be disposed on the inner side of the sealing surface 111, and the detection circuit unit 122 can be mounted on the recessed platform. The detection circuit unit 121 can be an FPC or the like. The width and thickness of the FPC can be set according to the detection requirements. For example, the width of the FPC can be 2 mm and the thickness can be 0.4 mm.

[0068] Using FPC protects the detection circuitry, which is encased in resin, preventing it from being exposed and avoiding potential issues like detachment, wear, or aging that could cause unsafe interference over time. It can be powered by 24V DC from power supply unit 124 or by BMS 03.

[0069] like Figure 5As shown, strain gauge 121 is electrically connected to controller 123 via detection circuit unit 122; the detection lines of detection circuit unit 122 can be connected to each strain gauge 121 via leads, and are also connected to controller 123 via detection lines. Controller 123 collects current, voltage, etc. from detection circuit unit 122.

[0070] When the material of the seal ages, the sealing surface may become loose, and the pressure sensed by the strain gauge 121 decreases. This causes changes in the electrical parameters such as voltage and / or current of the detection circuit unit 122 collected by the controller 123. The controller 123 determines whether the sealing surface 111 has failed based on the electrical parameters such as current and / or voltage of the detection circuit unit 122. If the sealing surface 111 is determined to have failed, a failure detection result is generated and sent to the BMS 03.

[0071] The controller 123 can send the failure detection results to the BMS 03 via wireless communication methods such as Bluetooth. The BMS 03 can then transmit the failure detection results to the vehicle system 04, which can instruct relevant personnel to perform inspection and other operations.

[0072] In some embodiments, the stress gauge can be a variety of strain gauges, such as a pressure-sensitive strain gauge, and can be a sensor used to measure minute changes in the shape of an object under stress. Multiple strain gauges are connected in parallel to the detection circuit unit.

[0073] like Figure 6 As shown, the strain gauges include strain gauge 1, strain gauge 2, ..., strain gauge N. These strain gauges are connected in parallel and are independent of each other. The detection circuit unit includes detection line 1221, and multiple strain gauges are electrically connected in parallel to the detection line 1221 of the detection circuit unit. The detection line 1221 can serve as a connecting bus, and two wires can be led out from both ends of each strain gauge (strain gauge 1, strain gauge 2, ..., strain gauge N) to connect to the detection line 1221 of the detection circuit unit. The controller can integrate a power supply unit, which can supply power to the detection line 1221 of the detection circuit unit and the controller.

[0074] When the pressure sensed by the stress plate changes, the internal resistance of the stress plate changes, causing a change in the electrical parameters, such as current or voltage, acquired by the controller in the detection circuit unit 122. For example, the electrical parameters include current; the controller acquires the current of the detection circuit unit 122. When the pressure sensed by the stress plate changes, the internal resistance of the stress plate changes, causing a change in the current acquired by the controller in the detection circuit unit 122. The controller determines whether the sealing surface has failed based on the current of the detection circuit unit. By determining whether the sealing surface has failed based on the current of the detection circuit unit, the controller can accurately detect whether a failure has occurred in the sealing surface.

[0075] When the external stress sensed by the strain gauge changes and decreases (the pressure sensed by the strain gauge decreases as the gasket ages and loosens), the variable resistance of the strain gauge increases accordingly. According to Ohm's law, the current of the detection circuit unit acquired by the controller decreases. When the current of the detection circuit unit reaches the set current threshold, it is determined that the sealing surface has failed, a failure detection result is generated and sent to the target system, and early warning information can be sent to prevent risks such as water ingress.

[0076] For example, the resistance of a strain gauge increases as pressure decreases. If the controller detects that the current in the detection circuit unit is below a current threshold, it determines that the sealing surface has failed. By utilizing the characteristic that the resistance of a strain gauge increases as pressure decreases, and by setting a current threshold, the controller can accurately detect whether a sealing surface has failed when the current in the detection circuit unit falls below that threshold.

[0077] During the use of seals, factors such as material aging weaken their sealing ability and reduce their compression deformation rate, potentially leading to seal failure and leakage problems in enclosures. An aging model of existing gaskets can be constructed, and the permanent compression ratio threshold of the seal can be determined based on experimental data. According to the gasket aging model and experimental data, it can be determined that when the permanent compression ratio of the seal reaches 30%, the seal will typically fail, posing a risk of liquid leakage.

[0078] Experiments can be conducted on the detection loop consisting of strain gauges, detection circuit units, and controllers. Based on the correspondence between the resistance of the strain gauges and the pressure they sense, the permanent compression ratio threshold of the seal (e.g., 30%), and factors such as the structure and voltage of the detection loop, the current threshold of the detection circuit unit is determined based on experimental data. Under the premise that the output voltage of the detection loop remains unchanged, when the controller determines that the current of the detection circuit unit is less than this current threshold, it is determined that the permanent compression ratio of the sealing surface has reached the permanent compression ratio threshold (e.g., 30%), the seal has failed, a failure detection result is generated, and it is sent to the target system.

[0079] In some embodiments, this disclosure provides an electrical device including a battery pack as described in any of the above embodiments, the battery pack being used to provide electrical energy; the electrical device may be a vehicle, etc.

[0080] In some embodiments, this disclosure provides a failure detection method applied to a battery pack as described in any of the above embodiments. The battery pack includes a seal and a failure detection module, and the failure detection method is executed in the failure detection module. Figure 7 This is a flowchart illustrating some embodiments of the failure detection method disclosed herein, such as... Figure 7 As shown:

[0081] Step S701: Check whether the seal has failed.

[0082] Step S702: If it is determined that the seal has failed, send the failure detection result to the target system.

[0083] The failure detection module includes strain gauges, detection circuit units, and a controller. The strain gauges are installed on the sealing surface of the seal to sense pressure, and the resistance of the strain gauges changes based on the pressure. The controller collects the electrical parameters of the detection circuit unit and determines whether the sealing surface has failed based on the electrical parameters. If the controller determines that the sealing surface has failed, it generates a failure detection result and sends it to the target system.

[0084] Electrical parameters include current. The controller collects the current from the detection circuit unit and determines whether the sealing surface has failed based on the current. For example, the controller determines that the sealing surface has failed when the current is less than a current threshold, where the resistance of the strain gauge increases as the pressure decreases.

[0085] In some embodiments, this disclosure provides a computer-readable storage medium storing computer instructions that are executed by a processor as in any of the above embodiments for failure detection.

[0086] Computer-readable storage media may take the form of any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples (not an exhaustive list) of readable storage media may include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0087] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0088] Embodiments of this disclosure may also be computer program products, including computer program instructions that, when executed by a processor, cause the processor to perform the steps in the failure detection methods according to various embodiments of this disclosure as described in the "Exemplary Methods" section above.

[0089] The steps of the methods disclosed herein are not limited to the specific order described above, unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Therefore, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0090] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This 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 pack, comprising: Seals; The failure detection module is used to detect whether the seal has failed; if the seal has failed, the module sends the failure detection result to the target system.

2. The battery pack as claimed in claim 1, wherein, The failure detection module includes: strain gauges, detection circuit units, and controllers; The strain gauge is mounted on the sealing surface of the seal to sense pressure, and the resistance of the strain gauge changes based on the change in pressure; the strain gauge is electrically connected to the controller through the detection circuit unit. The controller is used to collect the electrical parameters of the detection circuit unit, determine whether the sealing surface has failed based on the electrical parameters, and generate the failure detection result and send it to the target system if the sealing surface has failed.

3. The battery pack as described in claim 2, wherein, The electrical parameters include current; The controller is used to collect the current of the detection circuit unit and determine whether the sealing surface has failed based on the current; if the current is less than the current threshold, it is determined that the sealing surface has failed, wherein the resistance of the strain gauge increases as the pressure decreases.

4. The battery pack as described in claim 2, wherein, The strain gauges are multiple, and the multiple strain gauges are connected in parallel to the detection circuit unit.

5. The battery pack as described in claim 2, wherein, Multiple through holes are provided on the sealing surface; The strain gauge is positioned on the sealing surface between two adjacent through holes among the plurality of through holes.

6. The battery pack as claimed in claim 5, wherein, The sealing element includes a sealing gasket; The sealing surface includes the top surface of the sealing gasket, the detection circuit unit is mounted on the side of the sealing gasket, and the strain gauge is electrically connected to the detection unit, wherein the strain gauge includes a thin-film pressure sensor.

7. The battery pack as claimed in claim 2, wherein, The failure detection module includes: A power supply unit is provided for supplying power to the strain gauge, the detection circuit unit, and the controller, wherein the power supply unit includes a self-generated power supply unit.

8. The battery pack as claimed in any one of claims 1 to 7, wherein, The failure detection module sends the failure detection results via wireless communication.

9. An electrical appliance, comprising: The battery pack according to any one of claims 1 to 8, wherein the battery pack is used to provide electrical energy.

10. A failure detection method, applied in a battery pack, wherein, The battery pack includes a seal and a failure detection module, and the failure detection method is executed in the failure detection module, including: Detect whether the seal has failed; If the seal is determined to have failed, the failure detection result is sent to the target system.

11. The failure detection method as described in claim 10, wherein, The failure detection module includes: a strain gauge, a detection circuit unit, and a controller; the strain gauge is mounted on the sealing surface of the seal and is used to sense pressure, and the resistance of the strain gauge changes based on the change in pressure; the strain gauge is electrically connected to the controller through the detection circuit unit; the leakage detection method is executed in the controller, and detecting whether the seal has failed includes: The electrical parameters of the detection circuit unit are collected, and the failure of the sealing surface is determined based on the electrical parameters. The step of sending the failure detection result to the target system when it is determined that the seal has failed includes: If the sealing surface is determined to have failed, the failure detection result is generated and sent to the target system.

12. The failure detection method as described in claim 11, wherein, The electrical parameters include current; the acquisition of the electrical parameters of the detection circuit unit, and the determination of whether the sealing surface has failed based on the electrical parameters, includes: The current of the detection circuit unit is collected, and the failure of the sealing surface is determined based on the current.

13. The failure detection method as described in claim 11, wherein, The step of determining whether the sealing surface has failed based on the current includes: If the current is less than the current threshold, it is determined that the sealing surface has failed, wherein the resistance of the strain gauge increases as the pressure decreases.

14. A computer-readable storage medium storing computer instructions that are executed by a processor according to any one of claims 10 to 13, the failure detection method.

15. A computer program product storing computer instructions, the instructions being executed by a processor as described in any one of claims 10 to 13, for the failure detection method.

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