Liquid leakage detection device and method and vehicle

Abstract

The invention relates to a liquid leakage detection device and method and a vehicle, and relates to the technical field of vehicle control, and the method comprises the steps that firstly, an insulation fault signal sent by a battery management system BMS is received, and the insulation fault signal is an insulation fault signal sent by the battery management system BMS after a liquid absorption module absorbs leakage of cooling liquid of a vehicle battery pack; a corresponding insulation fault signal is conducted between a metal wire in the liquid absorption module and a box body of the vehicle battery pack; and judging that the cooling liquid of the vehicle battery pack leaks on the basis of the insulation fault signal. According to the technical scheme, when the vehicle battery pack cooling system leaks the cooling liquid, the metal wire is connected with the BMS through connection of the BMS, the liquid absorption module and the metal wire, the risk is reported at the first time, rapid risk elimination is supported, and the safety performance of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle control, and specifically relates to a liquid leakage detection device, method and vehicle. Background Art

[0002] With the rapid development of science, vehicles have become an indispensable means of transportation in life. As an important part of a vehicle, the vehicle battery pack may experience an excessively high temperature of the vehicle battery pack due to long-term use and high internal resistance of the battery during use. Therefore, a coolant can be used to cool the vehicle battery pack.

[0003] The coolant of the vehicle battery pack may leak. Currently, it is possible to detect whether the coolant of the vehicle battery pack has leaked by detecting the liquid level of the coolant. For example, if the liquid level of the coolant is lower than a certain threshold, it can be considered that the coolant of the vehicle battery pack has leaked.

[0004] However, in this detection method, when it is found that the coolant of the vehicle battery pack has leaked, the coolant has already flowed into the battery pack, causing the insulation of the entire pack to fail, and further leading to risks such as battery pack short circuit and thermal runaway. Summary of the Invention

[0005] In view of this, the present invention provides a liquid leakage detection device, method and vehicle, mainly aiming to solve the technical problem that in the existing detection method, when it is found that the coolant of the vehicle battery pack has leaked, the coolant has already flowed into the battery pack, causing the insulation of the entire pack to fail, and further leading to risks such as battery pack short circuit and thermal runaway.

[0006] According to a first aspect of the present invention, there is provided a liquid leakage detection device, including: a liquid absorption module, a metal wire, and a battery management system (Battery Management System, BMS);

[0007] The liquid absorption module is disposed in the box body of the vehicle battery pack, the liquid absorption module is connected to the box body, and the liquid absorption module is used to absorb the leaked liquid when the coolant of the vehicle battery pack leaks;

[0008] The liquid absorption module contains the metal wire, and the metal wire is connected to the BMS;

[0009] The BMS is used to monitor the insulation fault signal corresponding to the conduction of the metal wire and the box body after the liquid absorption module absorbs the leaked liquid, and the insulation fault signal is used to determine that the coolant of the vehicle battery pack has leaked.

[0010] Optionally, the liquid absorption module is disposed in the water tank of the box body and fixedly connected to the bottom of the water tank of the box body, and the water tank is located below the liquid cooling device of the vehicle battery pack.

[0011] Optionally, the cross-section of the metal wire is a fan-shaped structure.

[0012] Optionally, the metal wires are intermittently arranged in the liquid absorption module.

[0013] Optionally, the liquid absorption module is made of super absorbent polymer (SAP) material.

[0014] According to a second aspect of the present invention, there is provided a liquid leakage detection method, which can be applied to the above liquid leakage detection device. The method includes:

[0015] Receiving an insulation fault signal sent by the BMS, where the insulation fault signal is an insulation fault signal corresponding to the conduction between the metal wire in the liquid absorption module and the box body of the vehicle battery pack after the liquid absorption module absorbs the coolant leakage of the vehicle battery pack;

[0016] Based on the insulation fault signal, determining that the coolant of the vehicle battery pack leaks.

[0017] Optionally, after determining that the coolant of the vehicle battery pack leaks based on the insulation fault signal, the method further includes:

[0018] Generating and outputting an alarm message indicating that the coolant of the vehicle battery pack leaks; or,

[0019] Sending the vehicle information corresponding to the vehicle battery pack and the information indicating that the coolant of the vehicle battery pack leaks to the cloud server.

[0020] According to a third aspect of the present invention, there is provided a liquid leakage detection device, which includes:

[0021] A receiving module, configured to receive an insulation fault signal sent by the BMS, where the insulation fault signal is an insulation fault signal corresponding to the conduction between the metal wire in the liquid absorption module and the box body of the vehicle battery pack after the liquid absorption module absorbs the coolant leakage of the vehicle battery pack;

[0022] A determination module, configured to determine that the coolant of the vehicle battery pack leaks based on the insulation fault signal.

[0023] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:

[0024] Receiving an insulation fault signal sent by the BMS, wherein the insulation fault signal is an insulation fault signal corresponding to the conduction between the metal wire in the liquid suction module and the box of the vehicle battery pack after the liquid suction module absorbs the coolant leakage of the vehicle battery pack;

[0025] Based on the insulation fault signal, it is determined that the coolant of the vehicle battery pack is leaking.

[0026] According to a fifth aspect of the present invention, there is provided a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the following steps are implemented:

[0027] Receiving an insulation fault signal sent by the BMS, wherein the insulation fault signal is an insulation fault signal corresponding to the conduction between the metal wire in the liquid suction module and the box of the vehicle battery pack after the liquid suction module absorbs the coolant leakage of the vehicle battery pack;

[0028] Based on the insulation fault signal, it is determined that the coolant of the vehicle battery pack is leaking.

[0029] The present invention provides a leakage detection device, method and vehicle, wherein the leakage detection device includes: a liquid absorption module, a metal wire, and a BMS; the liquid absorption module is arranged in a box body of a vehicle battery pack, the liquid absorption module is connected to the box body, and the liquid absorption module is used to absorb the leakage when the coolant of the vehicle battery pack leaks; the liquid absorption module contains a metal wire, and the metal wire is connected to the BMS; the BMS is used to monitor the insulation fault signal corresponding to the conduction between the metal wire and the box body after the liquid absorption module absorbs the leakage, and the insulation fault signal is used to determine whether the coolant of the vehicle battery pack has leaked. Compared with the current leakage detection method, the present invention can use a liquid absorption module to absorb the leakage of the coolant in the vehicle battery pack when the coolant leaks. The liquid absorption module will exert its high-rate absorption capacity to absorb the leaked coolant in the first time. At the same time, a metal conductive wire harness is pre-embedded in the liquid absorption module. After the liquid absorption module absorbs the leakage, the BMS monitors the insulation fault signal corresponding to the conduction between the metal wire and the box body, and then determines that the coolant of the vehicle battery pack has leaked. While realizing the coolant leakage detection, the liquid absorption of the liquid absorption module can also effectively prevent the coolant from flowing into the battery pack, causing the insulation failure of the entire pack, and then causing the risk of battery pack short circuit, thermal runaway, etc.

[0030] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention. It should be understood that the drawings are used to better understand the solution and do not constitute a limitation to the present invention. Among them:

[0032] Figure 1 Schematic diagram of the internal structure of a liquid leakage detection device provided by an embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the structure of a liquid leakage detection device in an application scenario provided by an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the layout of a metal wire provided by an embodiment of the present invention;

[0035] Figure 4 Another schematic diagram of the layout of a metal wire provided by an embodiment of the present invention;

[0036] Figure 5 Another schematic diagram of the layout of a metal wire provided by an embodiment of the present invention;

[0037] Figure 6 Schematic diagram of the structure of a metal wire provided by an embodiment of the present invention;

[0038] Figure 7 Schematic diagram of the process flow of a liquid leakage detection method provided by another embodiment of the present invention;

[0039] Figure 8 Schematic diagram of the process flow of an application scenario provided by an embodiment of the present invention;

[0040] Figure 9 Schematic diagram of the structure of a liquid leakage detection device provided by an embodiment of the present invention;

[0041] Figure 10 Schematic diagram of the physical structure of a computer device provided by an embodiment of the present invention. Detailed implementation manners

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0043] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0046] The coolant of the vehicle battery pack may leak. Currently, it is possible to detect whether the coolant of the vehicle battery pack leaks by detecting the liquid level of the coolant. For example, if the liquid level of the coolant is lower than a certain threshold, it can be considered that the coolant of the vehicle battery pack has leaked.

[0047] To solve the above technical problems, the present invention provides a liquid leakage detection device, method and vehicle, which can solve the technical problems that when it is found that the coolant of the vehicle battery pack leaks, the coolant has flowed into the battery pack, causing the insulation of the whole pack to fail, and further leading to risks such as battery pack short circuit and thermal runaway.

[0048] The following is combined with Figure 1 Describe a liquid leakage detection device according to some embodiments of the present invention.

[0049] The liquid leakage detection device provided by some embodiments of the present invention, as Figure 1 shown, the liquid leakage detection device includes a liquid leakage detection device 100, and the liquid leakage detection device 100 includes a liquid absorption module 101, a metal wire 102 and a BMS 103;

[0050] The liquid absorption module 101 is arranged in the box of the vehicle battery pack, and the liquid absorption module 101 is connected to the box of the vehicle battery pack. The liquid absorption module 101 is used to absorb the leakage when the coolant of the vehicle battery pack leaks; the liquid absorption module 101 contains a metal wire 102, and the metal wire 102 is connected to the BMS103; BMS103 is used to monitor the insulation fault signal corresponding to the conduction between the metal wire 102 and the box of the vehicle battery pack after the liquid absorption module 101 absorbs the leakage, wherein the insulation fault signal is used to determine that the coolant of the vehicle battery pack has leaked.

[0051] Compared with the current leakage detection method, the present embodiment can use a liquid absorption module to absorb the leakage of the coolant in the vehicle battery pack when the coolant leaks. The liquid absorption module will exert its high-rate absorption capacity to absorb the leaked coolant in the first time. At the same time, a metal conductive wiring harness is pre-embedded in the liquid absorption module. After the liquid absorption module absorbs the leakage, the BMS monitors the insulation fault signal corresponding to the conduction between the metal wire and the box body, and then determines that the coolant in the vehicle battery pack has leaked. While realizing the coolant leakage detection, the liquid absorption of the liquid absorption module can also effectively prevent the coolant from flowing into the battery pack, causing the insulation failure of the entire pack, and then causing the risk of battery pack short circuit, thermal runaway, etc.

[0052] In some embodiments, the liquid suction module 101 may be disposed in a water tank of the box and fixedly connected to the bottom of the water tank of the box, wherein the water tank is located below the liquid cooling device of the vehicle battery pack;

[0053] In some application scenarios, the liquid absorption module is disposed in a box of a vehicle battery pack, which may be an external box of the battery pack. The vehicle battery pack and cooling equipment are arranged in the box, which is not limited in this embodiment.

[0054] In some embodiments, the liquid absorption module 101 is a highly absorbent resin SAP material. The leakage detection device 100 is used to receive the insulation fault signal sent by the BMS 103. The insulation fault signal is the insulation fault signal corresponding to the metal wire 102 in the liquid absorption module 101 being connected to the box of the vehicle battery pack after the liquid absorption module 101 absorbs the leakage of the coolant of the vehicle battery pack; based on the insulation fault signal, it is determined that the coolant of the vehicle battery pack is leaking. The technical solution in the present invention is explained, and no specific limitation is made here.

[0055] For example, Figure 2 As shown, the vehicle battery pack may include one or more battery cells, a liquid cooling plate or a liquid cooling pipe may be bonded to the battery cells, or both the liquid cooling plate and the liquid cooling pipe may be bonded at the same time, a lower box is arranged below the battery cells, and a water tank may be opened directly below the liquid cooling pipe (such as Figure 3 As shown), the sink is bonded to the SAP (as shown Figure 4As shown, when the coolant leaks, it can come into contact with the SAP immediately, thus preventing the vehicle battery pack from coming into contact with the coolant immediately when the coolant leaks. The coolant will directly flow into the interior of the battery pack, causing the insulation of the entire pack to fail, and further leading to the risks of battery pack short - circuit and thermal runaway.

[0056] In some embodiments, the cross - section of the metal wire 102 is a fan - shaped structure;

[0057] As a possible implementation, the liquid - absorbing module can be SAP. Metal wires are embedded in the SAP, and the metal wires are in a fan - shaped structure to contact the coolant with the largest area. When the coolant leaks, it will come into contact with the metal wires immediately. At the same time, SAP has good water - absorbing performance and can store a sufficient amount of leaked coolant.

[0058] Among them, for the embodiments of the present invention, for the embedded metal wires, considering cost, low - cost conductive metals such as Cu and Al can be preferably used. For example, the thickness range is 0.1mm < X < 5mm. At the same time, the metal wires are connected to the BMS. When they come into contact with water, they are conducted through the SAP to the box body, and a fault of too low insulation resistance is issued.

[0059] For example, as a possible reference scenario, as Figure 5 shown, the front view of the SAP and the embedded metal wire harness structure. The metal wire can be a single metal wire or a wire harness composed of multiple metal wires, as Figure 6 shown.

[0060] In some embodiments, the metal wires 102 are intermittently arranged in the liquid - absorbing module;

[0061] Exemplarily, for the SAP and the embedded metal wire harness structure to ensure the effect of absorbing coolant: the thickness H is recommended to be ≥2mm, the width Y is recommended to be ≥4mm, and the water absorption rate is 0.5 - 500 times > its own weight. When the vehicle liquid - cooling system leaks, it can ensure the absorption rate of the coolant and the volume of the absorbed coolant, and use this liquid - absorbing module to store the coolant after absorbing the coolant, so as to make the storage volume meet the leakage volume of the coolant leakage, and avoid the secondary leakage of the liquid - absorbing module in a short time after absorbing the above - mentioned leaked coolant, thus avoiding the risks of battery pack short - circuit and thermal runaway in the above scenario.

[0062] In some application scenarios, the metal wire structure can be used as a discontinuous method, and the length dimension can be taken as needed. For example, if the length of the current SAP is m and the width is n, then the length of the SAP can be taken on the side of the length m for analysis to determine the spacing distance of the discontinuously arranged metal wires and the length of each metal wire, and then the width n is used as the lateral arrangement distance of the metal wire, the spacing distance of the lateral metal wire is determined, and the metal wires are arranged discontinuously to achieve the purpose of saving the cost of metal wire arrangement.

[0063] Optionally, the length, direction, and size of the metal wire structure discontinuity can be arranged based on parameters such as the current leakage detection device, the position and shape of the vehicle battery pack, the position and shape of the liquid cooling plate or liquid cooling pipeline, the structure of the lower box, the length and width of the water tank, etc.

[0064] Compared with the current leakage detection method, the leakage detection scheme provided by this embodiment is provided in the embodiment of the present invention. By arranging SAP at the lower part of the water pipe (this patent takes the large surface cooling scheme as an example), and coordinating with the tank water tank structure, SAP and the tank are bonded and fixed. When the liquid cooling system leaks, the coolant will leak onto the SAP. SAP will exert its high-rate absorption capacity to absorb the leaked coolant in the first place. At the same time, the metal conductive wire harness is embedded in the SAP, and the insulation fault (which can be mapped as the coolant leakage fault) is issued through the BMS, and an alarm is issued to realize the fault prompt function after the coolant leaks. It avoids the problem that the coolant flows into the battery pack, causing the insulation failure of the whole pack, and then causing the risk of short circuit, thermal runaway, etc. of the battery pack. First, the insulation fault signal sent by the BMS is received. The above insulation fault signal is the insulation fault signal corresponding to the metal wire in the liquid suction module and the tank of the vehicle battery pack after the liquid suction module absorbs the coolant leakage of the vehicle battery pack; then based on the above insulation fault signal, it is determined that the coolant of the vehicle battery pack has leaked. By applying the technical solution of the embodiment of the present invention, when coolant leakage occurs in the vehicle battery pack cooling system, the leaked coolant can be quickly absorbed. At the same time, an early warning solution is adopted to report the risk in the first time, support rapid elimination of the risk, and improve the safety performance of the vehicle.

[0065] At the same time, the embodiment of the present invention also provides a leakage detection method, such as Figure 7 As shown, the method includes:

[0066] Step 201: Receive an insulation fault signal sent by a BMS.

[0067] Among them, the insulation fault signal is an insulation fault signal corresponding to the conduction between the metal wire in the liquid suction module and the box of the vehicle battery pack after the liquid suction module absorbs the coolant leakage of the vehicle battery pack.

[0068] For the embodiment of the present invention, BMS may refer to a battery management system that monitors the state of the battery in order to improve the utilization rate of the battery, prevent the battery from being overcharged and over-discharged, and extend the service life of the battery. It has the function of continuously monitoring the insulation resistance of the battery pack. When the insulation resistance at a certain position is lower than the design value, an early warning signal will be issued to remind the unpacking inspection; the insulation fault signal can be mapped to a coolant leakage fault; the liquid absorption module can use SAP, which is a functional polymer material with a very low cross-linking density, insoluble in water, and high water expansion. It can absorb water hundreds to thousands of times its own weight, and the absorbed water is not easy to be squeezed out by mechanical pressure. It has good water retention performance and the ability to absorb 50% ethanol solution can reach more than 100g / g. This embodiment does not limit this.

[0069] Optionally, in specific application scenarios, there are two main cooling solutions for existing vehicle battery packs. One is that the liquid cooling plate is mostly integrated with the battery case, and the bottom surface of the battery cell and the liquid cooling plate are bonded with thermally conductive adhesive to achieve the battery cell cooling function; the other is to improve the cooling capacity. Some battery solutions adopt a large-surface cooling solution for the battery cell to cool the largest surface of the battery cell, which has a better cooling effect. In these two cooling solutions, the liquid cooling pipelines are arranged inside the battery pack. When the liquid cooling system leaks, the coolant will flow directly into the battery pack, causing the insulation of the entire pack to fail, and then causing the battery pack to short-circuit and thermal runaway risks. Among them, leaks in the liquid cooling system are mostly leaks at the water pipe joints.

[0070] In some examples, when the liquid cooling system of vehicle A1 leaks, the coolant is absorbed by the liquid absorption module B2, and a metal wire C3 is pre-buried in the liquid absorption module B2, and the metal wire C3 and the battery management system D4 are an open circuit. After the liquid absorption module B2 absorbs the coolant, the metal wire C3 pre-buried in the liquid absorption module B2 contacts the coolant and uses the coolant as a medium to conduct with the battery management system D4, and then the battery management system D4 sends an insulation fault signal to the processor E.

[0071] For example, the specific process can be as follows Figure 8 As shown, first, SAP absorbs and stores the coolant; then the coolant infiltrates the conductive wiring harness; the BMS detects a conduction signal; the BMS then reports a low insulation resistance fault, which can be mapped to a coolant leakage fault, and then safety measures can be implemented based on the detection of the fault.

[0072] In some application scenarios, when receiving the insulation fault signal sent by the BMS, it can be received by a wireless communication device or by a wired device in the vehicle. The communication device can be configured according to different vehicle model parameters, such as: Electronic Control Unit (ECU), vehicle configuration host, cloud server, etc. The specific model is not limited in this embodiment.

[0073] For example, when determining whether a vehicle has a liquid leakage, when vehicle A1 has a coolant leakage and a circuit conduction signal of the BMS is obtained, the vehicle is equipped with a vehicle configuration host B26 at this time. The vehicle configuration host B26 has a calculation and analysis function and a wireless communication function. Since the calculation and analysis function of the vehicle configuration host is slow, or the service system of the vehicle configuration host is occupied at this time, an analysis duration can be preset. If it is greater than this analysis duration, the coolant leakage will be sent to the cloud processor. Using the strong calculation and analysis function of the cloud processor, the coolant leakage situation is analyzed to determine that vehicle A1 has an insulation fault, which can improve the detection speed when there is a coolant leakage, and thus improve the safety of the vehicle, the driver, etc.

[0074] Through the specific implementation manners of the above embodiments, the liquid absorption module can be used to absorb the leaked coolant to prevent the coolant from directly flowing into the battery pack internally in the first time, causing the entire pack insulation failure, and then triggering risks such as battery pack short circuit and thermal runaway. At the same time, an early warning scheme is adopted to send the risk to the processor in the first time to support rapid risk elimination.

[0075] Step 202: Based on the insulation fault signal, determine that the coolant of the vehicle battery pack has a liquid leakage.

[0076] For the embodiments of the present invention, when determining that the coolant of the vehicle battery pack has a liquid leakage based on the insulation fault signal, the following methods can be used but are not limited to them. The method includes: using the electric ECU to determine that the coolant of the vehicle battery pack has a liquid leakage based on the insulation fault signal sent by the battery management system BMS. The embodiments of the present invention do not make limitations on this.

[0077] For the embodiments of the present invention, as a possible implementation manner, the embodiment steps may further include: after determining that the coolant of the vehicle battery pack has a liquid leakage based on the insulation fault signal, generating and outputting an alarm message indicating that the coolant of the vehicle battery pack has a liquid leakage; or, sending the vehicle information corresponding to the vehicle battery pack and the information indicating that the coolant of the vehicle battery pack has a liquid leakage to the cloud server.

[0078] In some application scenarios, after determining that the coolant of the vehicle battery pack has a liquid leakage based on the insulation fault signal, the alarm message indicating that the coolant of the vehicle battery pack has a liquid leakage can be preset, for example: "Coolant has a liquid leakage", or "Cooling system failure", or "Battery pack insulation fault". The present embodiment does not make limitations on this. Then, the above preset alarm message is output, and the output can be a warning signal, for example: the fault lamp flashes, voice prompt, warning ringtone, etc.

[0079] Exemplarily, when the cloud server receives the information that the vehicle NI has a "battery pack insulation fault", after obtaining this information, the cloud server analyzes the parameters of the "battery pack insulation fault" of the vehicle NI and obtains that the current risk level of the vehicle NI is high. Then, the cloud server sends this information to the in-vehicle computer, and uses the in-vehicle computer to send an alarm message to the central control display screen to remind the driver, and makes a voice or alarm bell prompt to prevent the driver from failing to notice this information, thus avoiding safety accidents caused thereby. At the same time, the cloud server obtains the vehicle's location information, vehicle driving road condition information, rescue route, vehicle status information, vehicle personnel information, etc., and sends the above information and the vehicle alarm information to relevant emergency units for emergency preparation to improve the efficiency of dealing with safety accidents.

[0080] Optionally, when sending the vehicle information corresponding to the vehicle battery pack and the information that the coolant of the vehicle battery pack has leaked to the cloud server, the above vehicle information corresponding to the vehicle battery pack and the information that the coolant of the vehicle battery pack has leaked can be transmitted using a wireless network. Further optionally, after the cloud server receives the above vehicle information corresponding to the vehicle battery pack and the information that the coolant of the vehicle battery pack has leaked, the cloud server can analyze the above vehicle information corresponding to the vehicle battery pack and the information that the coolant of the vehicle battery pack has leaked, and feedback the result obtained from this analysis to the vehicle to prompt the driver to eliminate the fault as soon as possible and avoid potential safety hazards; at the same time, the cloud server can also feedback the above vehicle information corresponding to the vehicle battery pack and the information that the coolant of the vehicle battery pack has leaked to the vehicle status monitoring system corresponding to this vehicle, and this system analyzes and feedbacks it to the cloud server. The cloud server, according to this analysis result and the preset safety alarm level, for example: feedback it to the driver, or feedback it to the traffic control center, relevant emergency units and the driver to prevent safety accidents from occurring.

[0081] The leakage detection method provided by the embodiment of the present invention is that the SAP is arranged at the bottom of the water pipe (this patent takes the large-surface cooling solution as an example), and the SAP is bonded and fixed to the box body in conjunction with the water tank structure of the box body. When the liquid cooling system leaks, the coolant will leak onto the SAP, and the SAP will exert its high-rate absorption capacity to absorb the leaked coolant in the first place. At the same time, the metal conductive wire harness is pre-embedded in the SAP, and an insulation fault (which can be mapped as a coolant leakage fault) is issued through the BMS, and an alarm is issued to realize the fault prompt function after the coolant leaks. The problem of coolant flowing into the battery pack, causing the insulation failure of the entire pack, and then causing the risk of short circuit, thermal runaway, etc. of the battery pack is avoided. First, the insulation fault signal sent by the battery management system BMS is received. The above insulation fault signal is the insulation fault signal corresponding to the metal wire in the liquid suction module and the box body of the vehicle battery pack being connected after the liquid suction module absorbs the coolant leakage of the vehicle battery pack; then based on the above insulation fault signal, it is determined that the coolant of the vehicle battery pack has leaked. By applying the technical solution of the embodiment of the present invention, when coolant leakage occurs in the vehicle battery pack cooling system, the leaked coolant can be quickly absorbed. At the same time, an early warning solution is adopted to report the risk in the first time, support rapid elimination of the risk, and improve the safety performance of the vehicle.

[0082] Based on the above Figure 7 The specific implementation of the method shown in the embodiment provides a leakage detection device, such as Figure 9 As shown, the device includes: a receiving module 31 and a determining module 32.

[0083] The receiving module 31 is configured to receive an insulation fault signal sent by the battery management system BMS, wherein the insulation fault signal is an insulation fault signal corresponding to the metal wire in the liquid absorption module being connected to the box of the vehicle battery pack after the liquid absorption module absorbs the coolant leakage of the vehicle battery pack;

[0084] The determination module 32 is configured to determine whether the coolant of the vehicle battery pack is leaking based on the insulation fault signal.

[0085] In some embodiments of the present invention, the above-mentioned liquid leakage detection device further includes an output module and a sending module;

[0086] The output module may be configured to generate and output alarm information indicating that the coolant of the vehicle battery pack has leaked after determining that the coolant of the vehicle battery pack has leaked based on the insulation fault signal.

[0087] The sending module can be configured to send the vehicle information corresponding to the vehicle battery pack and the information that the coolant of the vehicle battery pack has leaked to the cloud server.

[0088] It should be noted that for other corresponding descriptions of the various functional modules of the liquid leakage detection device provided in the embodiments of the present invention, reference can be made to Figure 7 the corresponding description of the method shown, which will not be elaborated here.

[0089] Based on the above as Figure 7 shown in the method, correspondingly, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the following steps are implemented: receiving an insulation fault signal sent by a battery management system BMS, where the insulation fault signal is an insulation fault signal corresponding to the conduction of the metal wire in the liquid absorption module and the box body of the vehicle battery pack after the liquid absorption module absorbs the coolant leakage of the vehicle battery pack; based on the insulation fault signal, determining that the coolant of the vehicle battery pack has leaked.

[0090] Based on the above as Figure 7 shown in the method and as Figure 9 shown in the embodiment of the device, the embodiments of the present invention further provide an entity structure diagram of a computer device, as Figure 10 shown. The computer device includes: a processor 41, a memory 42, and a computer program stored on the memory 42 and executable on the processor. Among them, both the memory 42 and the processor 41 are arranged on a bus 43. When the processor 41 executes the program, the following steps are implemented: receiving an insulation fault signal sent by the BMS, where the insulation fault signal is an insulation fault signal corresponding to the conduction of the metal wire in the liquid absorption module and the box body of the vehicle battery pack after the liquid absorption module absorbs the coolant leakage of the vehicle battery pack; based on the insulation fault signal, determining that the coolant of the vehicle battery pack has leaked.

[0091] The liquid leakage detection device of the embodiments of the present invention can quickly absorb the leaked coolant by using a highly absorbent material, and at the same time adopt an early warning scheme to report the risk in the first time and support the rapid elimination of the risk.

[0092] Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by the computing device, so that they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order from here, or they can be separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module to implement. In this way, the present invention is not limited to any specific combination of hardware and software.

[0093] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A liquid leakage detection device, characterized in that, it includes: a liquid absorption module, a metal wire, and a battery management system BMS; the liquid absorption module is arranged in the box body of the vehicle battery pack, the liquid absorption module is connected to the box body, and the liquid absorption module is used to absorb the leaked liquid when the coolant of the vehicle battery pack leaks; the metal wire is included in the liquid absorption module, and the metal wire is connected to the BMS; the BMS is used to monitor the insulation fault signal corresponding to the conduction of the metal wire and the box body after the liquid absorption module absorbs the leaked liquid, and the insulation fault signal is used to determine that the coolant of the vehicle battery pack leaks.

2. The device according to claim 1, characterized in that, the liquid absorption module is arranged in the water tank of the box body and is fixedly connected to the bottom of the water tank of the box body, and the water tank is located below the liquid cooling device of the vehicle battery pack.

3. The device according to claim 1, characterized in that, the cross section of the metal wire is a fan-shaped structure.

4. The device according to claim 1, characterized in that, the metal wire is intermittently arranged in the liquid absorption module.

5. The device according to claim 1, characterized in that, the liquid absorption module is made of superabsorbent polymer SAP material.

6. A liquid leakage detection method, characterized in that, the method includes: receiving an insulation fault signal sent by a battery management system BMS, where the insulation fault signal is an insulation fault signal corresponding to the conduction of the metal wire in the liquid absorption module and the box body of the vehicle battery pack after the liquid absorption module absorbs the leaked coolant of the vehicle battery pack; judging that the coolant of the vehicle battery pack leaks based on the insulation fault signal.

7. The method according to claim 6, characterized in that, after judging that the coolant of the vehicle battery pack leaks based on the insulation fault signal, the method further includes: generating and outputting an alarm message indicating that the coolant of the vehicle battery pack leaks; or, sending the vehicle information corresponding to the vehicle battery pack and the information indicating that the coolant of the vehicle battery pack leaks to a cloud server.

8. A liquid leakage detection device, characterized in that, the device includes: a receiving module configured to receive an insulation fault signal sent by a battery management system BMS, where the insulation fault signal is an insulation fault signal corresponding to the conduction of the metal wire in the liquid absorption module and the box body of the vehicle battery pack after the liquid absorption module absorbs the leaked coolant of the vehicle battery pack; a judging module configured to judge that the coolant of the vehicle battery pack leaks based on the insulation fault signal.

9. A computer-readable storage medium, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the method according to any one of claims 6 to 7 is implemented.

10. An electronic device, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, characterized in that, when the processor executes the computer program, the method according to any one of claims 6 to 7 is implemented.

11. A vehicle, characterized in that, it includes: The device according to any one of claims 1 to 5, or the electronic device according to claim 10.

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