Battery pack cooling liquid leakage detection method, device and equipment and storage medium

Abstract

The invention discloses a battery pack cooling liquid leakage detection method, device and equipment and a storage medium, the battery pack comprises a liquid leakage detection device used for detecting whether liquid leakage occurs in the battery pack, and the method comprises the steps that after a vehicle is started, a first liquid leakage detection result of the liquid leakage detection device is acquired; if the first liquid leakage detection result is liquid leakage, adjusting the posture of the battery pack, so that the leaked liquid is gathered to the liquid leakage detection device under the condition that the liquid leakage exists in the battery pack; obtaining a second liquid leakage detection result of the liquid leakage detection device after the posture of the battery pack is adjusted; and based on the first liquid leakage detection result and the second liquid leakage detection result, determining whether the cooling liquid of the battery pack leaks or not. According to the method, through a dual verification mechanism, the accuracy, timeliness and reliability of coolant leakage detection are improved, the user safety is effectively guaranteed, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of battery management technology, and in particular to a method, apparatus, device, and storage medium for detecting coolant leakage in a battery pack. Background Technology

[0002] In the field of new energy vehicles, batteries are crucial power components, and their performance and safety directly affect the overall performance of the vehicle and the safety of the driver's life and property. Among them, the battery pack cooling system plays a key role in maintaining the normal operating temperature of the battery.

[0003] However, in actual use, there is a risk of coolant leakage from the battery pack. Once a coolant leak occurs, it can trigger a series of serious problems. Coolant leakage reduces the battery's insulation performance, and as the leak progresses, it can potentially cause a short circuit, leading to battery thermal runaway. Battery thermal runaway not only causes irreversible damage to the battery itself, resulting in vehicle powertrain malfunctions and affecting normal vehicle operation, but it can also cause significant property damage to the driver and even endanger personal safety.

[0004] Therefore, how to detect battery pack coolant leakage in a timely and accurate manner has become an important technical problem that urgently needs to be solved in the field of new energy vehicles. Summary of the Invention

[0005] In view of the above problems, the present invention proposes a method for detecting coolant leakage in battery packs. By combining active and passive detection of coolant leakage, the method effectively improves detection accuracy, detects leakage problems in a timely manner, avoids safety hazards, protects user safety, and enhances the user experience.

[0006] In a first aspect, a method for detecting coolant leakage in a battery pack is provided, the battery pack including a leakage detection device for detecting whether the battery pack is leaking coolant, the method comprising: After the vehicle is started, the first leakage detection result of the leakage detection device is obtained; If the first leakage detection result is leakage, the attitude of the battery pack is adjusted so that, in the event of leakage, the leakage liquid collects at the leakage detection device. Obtain the second leakage detection result of the leakage detection device after the attitude adjustment of the battery pack; Based on the first leakage detection result and the second leakage detection result, it is determined whether the coolant in the battery pack is leaking.

[0007] In some embodiments, adjusting the attitude of the battery pack includes: The vehicle speed is reduced to a preset threshold, and the height of the vehicle suspension is adjusted to adjust the battery pack to the target posture. When the battery pack is in the target posture, if leakage occurs, the leakage will converge towards the location of the leakage detection device under the action of gravity.

[0008] In some embodiments, the vehicle includes four suspensions located at the four wheels of the vehicle, the battery pack includes a battery pack housing, and the leakage detection device includes four leakage detection devices located at the four bottom corners of the battery pack housing; The adjustment of the vehicle suspension height to adjust the battery pack to the target attitude includes: One of the four suspensions is adjusted to the lowest point and the other three to the highest point in sequence, so that the battery pack is in four different target postures in sequence, and each target posture is maintained for a set time; wherein, when the battery pack is in the four different target postures, the leaked liquid will converge to the location of the four leak detection devices in sequence under the action of gravity.

[0009] In some embodiments, obtaining a second leakage detection result of the leakage detection device after the attitude adjustment of the battery pack includes: The leakage detection results of the four leakage detection devices are obtained sequentially. The second leakage detection result is determined based on the leakage detection results of the four leakage detection devices.

[0010] In some embodiments, determining the second leakage detection result based on the leakage detection results of the four leakage detection devices includes: If the leakage detection result of any one of the four leakage detection devices is leakage, then the second leakage detection result is determined to be leakage.

[0011] In some embodiments, determining whether the coolant in the battery pack is leaking based on the first leak detection result and the second leak detection result includes: If both the first and second leakage detection results indicate leakage, it is determined that the battery pack is leaking coolant.

[0012] In some embodiments, before adjusting the orientation of the battery pack, the method further includes: If the first leak detection result is a leak, a first pop-up window is generated and displayed. The first pop-up window is used to remind the user that the battery pack may have coolant leakage and that active leak detection is required. The system receives a first leakage detection command generated by the user based on the first pop-up window. The first leakage detection command is used to indicate that the posture of the battery pack needs to be adjusted to obtain a second leakage detection result.

[0013] In some embodiments, the method further includes: After the vehicle is started, a second pop-up window is generated and displayed at preset time intervals. The second pop-up window is used to remind the user that a leak detection is required. The system receives a second leakage detection command generated by the user based on the second pop-up window. The second leakage detection command is used to indicate that the attitude of the battery pack needs to be adjusted to obtain a second leakage detection result.

[0014] In some embodiments, the method further includes: After the vehicle is started, the insulation resistance value of the battery pack is obtained; A third pop-up window is generated and displayed based on the insulation resistance value. The third pop-up window is used to remind the user that the insulation resistance value is abnormal and leakage detection is required. Receive a third leakage detection command generated by the user based on the third pop-up window. The third leakage detection command is used to indicate that the attitude of the battery pack needs to be adjusted to obtain a second leakage detection result.

[0015] In some embodiments, after determining that the battery pack is leaking coolant, the method further includes: A fourth pop-up window is generated and displayed, which is used to remind the user that the battery pack has leaked.

[0016] In some embodiments, the leakage detection device includes a drain valve and a pressure sensor, wherein the drain valve has a receiving cavity for collecting leakage, and the pressure sensor is used to detect the pressure generated by the leakage in the receiving cavity; The step of obtaining the first leakage detection result of the leakage detection device includes: Obtain the first pressure value detected by the pressure sensor; The first leakage detection result is determined based on the first pressure value, and the first leakage result includes leakage and no leakage.

[0017] In some embodiments, determining the first leakage detection result based on the first pressure value includes: If the first pressure value is greater than the preset leakage pressure threshold, the first leakage result is determined to be a leakage.

[0018] Secondly, a battery pack coolant leakage detection device is provided, the battery pack including a leakage detection device for detecting whether the battery pack is leaking coolant, the device comprising: The first acquisition module is used to acquire the first leakage detection result of the leakage detection device after the vehicle is started. An attitude adjustment module is used to adjust the attitude of the battery pack if the first leakage detection result is leakage, so that the leakage of the battery pack will converge at the leakage detection device in the event of leakage. The second acquisition module is used to acquire the second leakage detection result of the leakage detection device after the attitude adjustment of the battery pack; The determination module is used to determine the coolant leakage of the battery pack based on the first leakage detection result and the second leakage detection result.

[0019] Thirdly, an electronic device is provided, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the battery pack coolant leakage detection method as described in the first aspect.

[0020] Fourthly, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing the computer to perform the battery pack coolant leakage detection method as described in the first aspect.

[0021] The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: This invention provides a method, apparatus, device, and storage medium for detecting coolant leakage in a battery pack. By employing a combination of active and passive detection methods to cross-verify the leak, the accuracy of the detection is effectively improved. Specifically, after the vehicle is started, a first leak detection result from the leak detection device is acquired—a passive leak detection. When a leak is initially detected, the battery pack's orientation is adjusted to allow the leaking fluid to converge on the leak detection device, and a second leak detection result is then acquired. This active orientation adjustment ensures that the leaking fluid makes more thorough contact with the leak detection device, thereby improving the reliability of the detection. A comprehensive judgment based on the first and second leak detection results allows for a more accurate determination of whether the battery pack coolant is actually leaking. This dual detection mechanism not only improves the reliability of coolant leak detection but also enables timely detection of leaks, preventing safety hazards such as battery short circuits and thermal runaway caused by leaks. This protects the driver's property and personal safety and enhances the user experience.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a partial structural diagram of a battery pack provided in an embodiment of the present invention; Figure 2 This is a simplified structural diagram of a leakage detection device provided in an embodiment of the present invention; Figure 3 This is a flowchart of a battery pack coolant leakage detection method provided in an embodiment of the present invention; Figure 4 This is a flowchart of a battery pack coolant leakage detection method according to another embodiment of the present invention; Figure 5 This is a flowchart of a method for detecting battery pack coolant leakage according to another embodiment of the present invention; Figure 6 This is a flowchart of a method for detecting battery pack coolant leakage according to another embodiment of the present invention; Figure 7 This is a structural block diagram of a battery pack coolant leakage detection device provided in an embodiment of the present invention. Detailed Implementation

[0024] To better understand the above technical solutions, the following will describe the above technical solutions in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. Unless otherwise specified, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0025] To better understand the present invention, the following provides a detailed description of the application scenarios of the battery pack coolant leakage detection method provided by the present invention.

[0026] In the scenario covered by this invention, the battery pack, as a core power component of new energy vehicles, includes a leakage detection device for detecting whether the battery pack is leaking, and a battery pack housing.

[0027] Figure 1 This is a partial structural diagram of a battery pack provided in an embodiment of the present invention, as shown below. Figure 1As shown, the leakage detection device 20 includes four leakage detection devices located at the four corners of the bottom of the battery pack housing 10, specifically including a first leakage detection device 20a, a second leakage detection device 20b, a third leakage detection device 20c, and a fourth leakage detection device 20d. This layout design ensures that regardless of where a coolant leak occurs in the battery pack, the leaking coolant has a high probability of flowing to the leakage detection devices at the bottom, thereby effectively improving the coverage and accuracy of leakage detection.

[0028] Figure 2 This is a simplified structural diagram of a leakage detection device provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the leakage detection device 20 includes a drain valve 21 and a pressure sensor 22. The drain valve 21 has a receiving cavity S for collecting leakage, and the pressure sensor 22 is used to detect the pressure generated by the leakage in the receiving cavity S.

[0029] Specifically, the drain valve 21 includes a valve body 211, a valve core 212 movably disposed within the valve body 211, and a spring 213 sleeved on the valve core 212. The valve body 211 has a receiving cavity S for collecting leaked coolant, and the valve body 211 is provided with an inlet a and an outlet b communicating with the receiving cavity S. The receiving cavity S is connected to the leaked coolant collection channel inside the battery pack housing through the inlet a and a flow channel inside the battery pack housing. The valve core 212 is configured to seal the outlet b under the force of the spring 213. When coolant leaks from the battery pack, the leaked coolant flows into the receiving cavity S through the inlet a. As the amount of coolant in the receiving cavity S gradually increases, when it reaches a certain volume, the coolant will exert pressure on the valve core 212. When this pressure exceeds the force of the spring 213, the valve core 212 will move, thereby opening the outlet b, allowing the coolant in the receiving cavity S to be discharged through the outlet b. The pressure sensor 22 is mounted on the valve core 212 and can accurately detect the pressure exerted on the valve core 212 by the leakage in the containment cavity S, and convert the pressure signal into an electrical signal output.

[0030] It should be noted that, Figure 2 The cavity S shown is an annular cavity, and both the inlet a and outlet b are annular openings that communicate with the annular cavity.

[0031] The battery pack also includes a Battery Management System (BMS), which monitors various electrical parameters of the battery pack, such as insulation resistance, to ensure its electrical safety. Simultaneously, the BMS is electrically connected to the leakage detection device 20, enabling it to acquire leakage detection results in real time.

[0032] Furthermore, the BMS is electrically connected to the Vehicle Control Unit (VCU) within the vehicle. This allows the BMS to promptly transmit the leakage detection results from the leakage detection device to the VCU. As the core control unit of the vehicle, the VCU can execute the battery pack coolant leakage detection method described in this application based on the received leakage detection results.

[0033] Figure 3 This is a flowchart of a battery pack coolant leakage detection method provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the detection method includes: Step S310: After the vehicle is started, obtain the first leakage detection result of the leakage detection device.

[0034] The first leakage detection result includes leakage and no leakage, which is used to make a preliminary judgment on whether there is a coolant leak in the battery pack.

[0035] Step S320: If the first leakage detection result is leakage, adjust the battery pack's orientation so that, in the event of leakage, the leakage will converge at the leakage detection device.

[0036] Step S330: Obtain the second leakage detection result of the leakage detection device after the battery pack attitude adjustment.

[0037] The second leakage detection result includes leakage and no leakage, which is used to help determine whether there is a coolant leak in the battery pack.

[0038] Step S340: Based on the first leakage detection result and the second leakage detection result, determine whether the coolant in the battery pack is leaking.

[0039] In some embodiments, obtaining the first leakage result of the leakage detection device in step S310 includes: Acquire the first pressure value detected by the pressure sensor; determine the first leakage detection result based on the first pressure value, the first leakage result including leakage and no leakage.

[0040] After the vehicle is started, the pressure sensor in the leak detection device activates, monitoring the pressure within the containment chamber in real time. The pressure sensor records and transmits the detected pressure value as the initial pressure value. If a significant change in the initial pressure value is detected, it usually means that coolant may have leaked and accumulated in the containment chamber, exerting additional pressure on the valve core. At this point, by obtaining the initial leak detection result as a preliminary reference, it is possible to quickly determine whether there is a risk of coolant leakage in the battery pack, providing a basis for further inspection and handling.

[0041] In some embodiments, determining a first leak detection result based on a first pressure value includes: If the first pressure value is greater than the preset leakage pressure threshold, the first leakage result is determined to be leakage.

[0042] The leakage pressure threshold is preset based on the design bearing area of ​​the drain valve and the physical properties of the coolant. This threshold distinguishes between normal pressure fluctuations and abnormal pressure increases caused by coolant leakage. For example, the preset leakage pressure threshold can be the pressure value generated by a 3ml leak. This threshold is calculated through experiments and simulations to ensure that the pressure will not exceed this value under normal circumstances. When the first pressure value exceeds the leakage pressure threshold, it indicates an abnormal pressure increase within the containment cavity, most likely due to coolant leakage. In this case, the first leakage result can be determined as a leak.

[0043] In some embodiments, adjusting the attitude of the battery pack in step S320 includes: The vehicle speed is reduced to a preset threshold, and the height of the vehicle suspension is adjusted to adjust the battery pack to the target posture. When the battery pack is in the target posture, if leakage occurs, the leakage will converge towards the location of the leakage detection device under the action of gravity.

[0044] To ensure vehicle safety during battery pack attitude adjustments, the vehicle speed must first be reduced to a preset threshold. This threshold can be set to 0, meaning the vehicle comes to a complete stop. This avoids attitude adjustments while driving, ensuring operational safety and accuracy. During driving, when the BMS detects a leak, the VCU will control the vehicle to decelerate and stop. The specific operation of reducing the vehicle speed to the preset threshold can be achieved by the VCU controlling the vehicle's braking system. The braking system will automatically adjust the braking force according to the preset speed threshold, smoothly decelerating the vehicle until it stops. Vehicle suspension systems typically have height adjustment capabilities, which can be controlled by the VCU. Adjusting the vehicle suspension height changes the battery pack's tilt angle to achieve the target attitude. This ensures that leaks in the battery pack are collected to the leak detection device to the greatest extent possible, allowing for more effective detection and improved accuracy.

[0045] In some embodiments, adjusting the height of the vehicle suspension to adjust the battery pack to a target attitude includes: One of the four suspensions is adjusted to the lowest point in sequence, while the other three are adjusted to the highest point, so that the battery pack is in four different target postures in sequence, and the battery pack is in each target posture for a set time. When the battery pack is in the four different target postures, the leaking liquid will converge to the location of the four leak detection devices in sequence under the action of gravity.

[0046] In the above embodiment, when a small amount of coolant leaks from the battery, the internal structure of the battery may obstruct the flow of coolant to one of the drain valves. Therefore, by sequentially adjusting the height of the four suspensions of the vehicle, so that the battery pack is in four different target postures in sequence, this situation can be effectively avoided, ensuring that the coolant can converge to each leak detection device, thereby improving the accuracy of detection.

[0047] Specifically, the vehicle includes a first suspension located at the left front wheel, a second suspension located at the right front wheel, a third suspension located at the left rear wheel, and a fourth suspension located at the right rear wheel. For example... Figure 1 As shown, the leakage detection device 20 includes a first leakage detection device 20a located at the bottom of the battery pack housing and closest to the first suspension, a second leakage detection device 20b located closest to the second suspension, a first leakage detection device 20c located closest to the third suspension, and a fourth leakage detection device 20d located closest to the fourth suspension.

[0048] Then adjust the vehicle's suspension height to bring the battery pack to the target orientation, including: Adjust the first suspension to the lowest point and the other three suspensions to the highest point so that the battery pack is in the first target posture. The first target posture is the posture in which leakage liquid will flow into the first leakage detection device 20a under the action of gravity. The first target posture ensures that leakage liquid can flow into the first leakage detection device 20a, thereby detecting the leakage situation in this area.

[0049] Adjust the second suspension to the lowest point and the other three suspensions to the highest point so that the battery pack is in the second target attitude. The second target attitude is the attitude in which leakage liquid will flow into the second leakage detection device 20b under the action of gravity. The second target attitude ensures that leakage liquid can flow into the second leakage detection device 20b, thereby detecting the leakage situation in this area.

[0050] Adjust the third suspension to the lowest point and the other three suspensions to the highest point so that the battery pack is in the third target attitude. The third target attitude is the attitude in which leakage liquid will flow into the third leakage detection device 20c under the action of gravity. The third target attitude ensures that leakage liquid can flow into the third leakage detection device 20c, thereby detecting the leakage situation in this area.

[0051] Adjust the fourth suspension to the lowest point and the other three suspensions to the highest point so that the battery pack is in the fourth target attitude. The fourth target attitude is the attitude in which the leaked liquid will flow into the fourth leak detection device 20d under the action of gravity. The fourth target attitude ensures that the leaked liquid can flow into the fourth leak detection device 20d, thereby detecting the leak in this area.

[0052] It should be noted that the battery pack needs to be held in each target orientation for a set time to ensure that the leaking liquid has sufficient time to converge to the corresponding leak detection device under gravity. The set time can be adjusted based on factors such as the size of the battery pack, the fluidity of the leaking liquid, and the response time of the detection device to ensure the accuracy and reliability of the detection results. For example, the set time can be greater than 30 seconds.

[0053] In other embodiments, the layout of the leakage detection device can be adjusted according to actual needs. For example, a single leakage detection device can be placed only in one corner of the bottom of the battery pack housing. In this case, by adjusting the orientation of the battery pack so that the leakage detection device is at its lowest point, the leaked liquid can be drawn into the detection device under the influence of gravity. This method is suitable for scenarios where the detection accuracy requirement is relatively low, or where the battery pack structure is relatively simple and the leakage flow direction is relatively clear.

[0054] Alternatively, two leak detection devices can be positioned diagonally at the bottom of the battery pack casing. By adjusting the battery pack's orientation so that these two leak detection devices are positioned sequentially at the lowest point, leaks can be directed to each of these devices. This method reduces the number of detection devices while maintaining high detection coverage, making it suitable for detection scenarios requiring moderate accuracy.

[0055] Understandably, regardless of the layout, the core of this invention lies in adjusting the battery pack's orientation to utilize gravity to guide the coolant towards the leak detection device, thereby improving the accuracy and reliability of leak detection. This flexible layout and orientation adjustment method allows the invention to adapt to different types of battery pack structures and detection requirements.

[0056] In some embodiments, obtaining the second leakage detection result of the leakage detection device after the battery pack attitude adjustment in step S330 includes: The leakage detection results of four leakage detection devices are obtained sequentially; the second leakage detection result is determined based on the leakage detection results of the four leakage detection devices.

[0057] By acquiring the leakage detection results from four leakage detection devices, a comprehensive assessment of whether the battery pack is leaking coolant can be achieved, which improves the accuracy of leakage detection. Furthermore, analyzing the pressure values ​​from the four devices allows for further pinpointing of the leak's location. For example, if only the pressure value of the first leakage detection device exceeds a preset threshold, while the pressure values ​​of the other three devices are within the normal range, it can be preliminarily determined that the leak is mainly concentrated in the front left corner of the battery pack. This precise location capability provides crucial information for subsequent maintenance and repair, enabling maintenance personnel to quickly locate the leak point, thereby reducing maintenance time and costs and improving maintenance efficiency.

[0058] In some embodiments, the method may further include: Based on the leakage detection results from four leakage detection devices, the location of the leak is determined and displayed, allowing users or maintenance personnel to quickly locate the leak point and take timely measures for repair or replacement, thereby reducing maintenance time and costs and improving maintenance efficiency. This visualized location information not only helps users and maintenance personnel quickly identify the problem, but also provides drivers with real-time safety warnings during vehicle operation, further enhancing vehicle safety and reliability.

[0059] In some embodiments, determining a second leakage detection result based on the leakage detection results of four leakage detection devices includes: If any one of the four leakage detection devices detects a leak, then the second leakage detection result is determined to be a leak.

[0060] Cross-verification of multiple leak detection devices can effectively reduce false alarms. Even if one leak detection device falsely reports a leak due to malfunction or interference, the results of other detection devices can be used as a reference to further confirm the authenticity of the leak.

[0061] In some embodiments, determining whether the battery pack's coolant is leaking based on the first leak detection result and the second leak detection result in step S340 includes: If both the first and second leak detection results indicate leakage, a coolant leak in the battery pack is confirmed. This dual detection mechanism effectively improves the accuracy and reliability of the detection results.

[0062] In some embodiments, after performing step S340 to determine that the battery pack is leaking, the method may further include: A fourth pop-up window is generated and displayed to remind the user that the battery pack is leaking.

[0063] The fourth pop-up notification mechanism provides timely and accurate feedback to users regarding the battery pack's coolant status, ensuring users make informed decisions based on the vehicle's actual condition. If a coolant leak is detected, users can promptly visit a 4S dealership for professional handling, effectively preventing safety hazards such as battery short circuits and thermal runaway caused by the leak, thus protecting the vehicle and its passengers. Conversely, if no coolant leak is confirmed, a pop-up will inform the user that the vehicle is functioning normally and can continue to be used, reducing unnecessary anxiety and enhancing the user experience.

[0064] Based on the same inventive concept, another embodiment of the present invention provides a method for detecting battery pack coolant leakage, used for detecting battery pack coolant leakage. In this embodiment, the method further includes: before adjusting the battery pack's orientation, if a first leakage detection result indicates leakage, generating and displaying a first pop-up window; and receiving a first leakage detection command generated by the user based on the first pop-up window.

[0065] Figure 4 This is a flowchart of a battery pack coolant leakage detection method according to another embodiment of the present invention, as shown below. Figure 4 As shown, the detection method includes: Step S410: After the vehicle is started, obtain the first leakage detection result of the leakage detection device.

[0066] The specific implementation of step S410 can be found in the description of step S310 in the foregoing embodiments, and will not be repeated here.

[0067] Step S420: If the first leak detection result is a leak, generate and display the first pop-up window. The first pop-up window is used to remind the user that there may be a coolant leak in the battery pack and that active leak detection is required.

[0068] Step S430: Receive the first leakage detection command generated by the user based on the first pop-up window. The first leakage detection command is used to indicate that the attitude of the battery pack needs to be adjusted to obtain the second leakage detection result.

[0069] Step S440: Based on the first leakage detection command and / or the first leakage detection result, adjust the attitude of the battery pack so that if leakage occurs, the leakage liquid will collect in the leakage detection device.

[0070] Specifically, the battery pack attitude is adjusted when at least one of the following conditions is met: a first leakage detection result indicates leakage, and a first leakage detection command is received. The specific implementation of adjusting the battery pack attitude in step S440 can be found in the description of step S320 in the aforementioned embodiments.

[0071] Step S450: Obtain the second leakage detection result of the leakage detection device after the battery pack attitude adjustment.

[0072] The specific implementation of step S450 can be found in the description of step S330 in the foregoing embodiments, and will not be repeated here.

[0073] Step S460: Based on the first leakage detection result and the second leakage detection result, determine whether the coolant in the battery pack is leaking.

[0074] The specific implementation of step S460 can be found in the description of step S340 in the foregoing embodiments.

[0075] The above embodiment generates and displays a first pop-up window before adjusting the battery pack's orientation, allowing the user to trigger the first leak detection command. This user interaction mechanism can promptly notify the user of potential coolant leaks and guide the user to actively participate in subsequent inspection procedures. Through the pop-up reminder, the user is clearly aware of the potential risk of a battery pack leak and can perform further inspection operations according to the prompts. This not only enhances the user's awareness of the vehicle's safety status but also improves the initiative and timeliness of inspections, ensuring that coolant leaks can be responded to and addressed quickly, thereby improving vehicle safety and the user experience.

[0076] Based on the same inventive concept, another embodiment of the present invention provides a method for detecting battery pack coolant leakage, used for detecting battery pack coolant leakage. In this embodiment, the method further includes: generating and displaying a second pop-up window at preset time intervals after the vehicle is started; and receiving a second leakage detection command generated by the user based on the second pop-up window.

[0077] Figure 5 This is a flowchart of a battery pack coolant leakage detection method according to another embodiment of the present invention, as shown below. Figure 5 As shown, the detection method includes: Step S510: After the vehicle is started, obtain the first leakage detection result of the leakage detection device.

[0078] The specific implementation of step S510 can be found in the description of step S310 in the foregoing embodiments, and will not be repeated here.

[0079] Step S520: After the vehicle is started, a second pop-up window is generated and displayed at preset time intervals. The second pop-up window is used to remind the user to perform a leak detection.

[0080] The preset time interval can be a user-defined time interval or a default time interval.

[0081] Step S530: Receive the second leakage detection command generated by the user based on the second pop-up window. The second leakage detection command is used to indicate that the attitude of the battery pack needs to be adjusted to obtain the second leakage detection result.

[0082] Step S540: Based on the second leakage detection command and / or the first leakage detection result, adjust the attitude of the battery pack so that if leakage occurs, the leakage liquid will converge at the leakage detection device.

[0083] Specifically, the battery pack attitude is adjusted when at least one of the following conditions is met: a first leakage detection result indicates leakage, and a second leakage detection command is received. The specific implementation of adjusting the battery pack attitude in step S540 can be found in the description of step S320 in the aforementioned embodiments.

[0084] Step S550: Obtain the second leakage detection result of the leakage detection device after the battery pack attitude adjustment.

[0085] The specific implementation of step S550 can be found in the description of step S330 in the foregoing embodiments.

[0086] Step S560: Based on the first leakage detection result and the second leakage detection result, determine whether the coolant in the battery pack is leaking.

[0087] The specific implementation of step S560 can be found in the description of step S340 in the foregoing embodiments.

[0088] It should be noted that the present invention does not limit the order of the steps in the above embodiments. For example, step S510 may be executed after steps S520 to S530, or step S510 may be executed synchronously with steps S520 to S530, etc.

[0089] The above embodiment generates and displays a second pop-up window at preset time intervals after the vehicle is started, allowing the user to trigger a second leak detection command. This periodic reminder mechanism ensures that users do not neglect to check for battery pack leaks, and can promptly detect potential problems even without obvious signs of leakage. By receiving user detection commands to adjust the battery pack orientation and obtain more accurate leak detection results, this method not only improves the initiative and reliability of leak detection but also enhances user participation in vehicle maintenance, helping to promptly detect and address coolant leaks, thereby ensuring safe vehicle operation and extending battery pack lifespan.

[0090] Based on the same inventive concept, another embodiment of the present invention provides a method for detecting battery pack coolant leakage, used for detecting battery pack coolant leakage. In this embodiment, the method further includes: after the vehicle is started, acquiring the insulation resistance value of the battery pack; generating and displaying a third pop-up window based on the insulation resistance value; and receiving a third leakage detection command generated by the user based on the third pop-up window.

[0091] Figure 6 This is a flowchart of a battery pack coolant leakage detection method according to another embodiment of the present invention, as shown below. Figure 6 As shown, the detection method includes: Step S610: After the vehicle is started, obtain the first leakage detection result of the leakage detection device and the insulation resistance value of the battery pack.

[0092] The specific implementation method for obtaining the first leakage detection result in step S610 can be found in the relevant description of step S310 in the aforementioned embodiments, and will not be repeated here.

[0093] Step S620: Generate and display a third pop-up window based on the insulation resistance value. The third pop-up window is used to remind the user that the insulation resistance value detection is abnormal and leakage detection is required.

[0094] Step S630: Receive the third leakage detection command generated by the user based on the third pop-up window. The third leakage detection command is used to indicate that the battery pack attitude needs to be adjusted to obtain the second leakage detection result.

[0095] Step S640: Based on the third leakage detection command and / or the first leakage detection result, adjust the attitude of the battery pack so that if leakage occurs, the leakage liquid will converge at the leakage detection device.

[0096] Specifically, the battery pack attitude is adjusted when at least one of the following conditions is met: a first leakage detection result indicates leakage, and a third leakage detection command is received. The specific implementation of adjusting the battery pack attitude in step S640 can be found in the description of step S320 in the aforementioned embodiments.

[0097] Step S650: Obtain the second leakage detection result of the leakage detection device after the battery pack attitude adjustment.

[0098] The specific implementation of step S650 can be found in the description of step S330 in the foregoing embodiments.

[0099] Step S660: Based on the first leakage detection result and the second leakage detection result, determine whether the coolant in the battery pack is leaking.

[0100] The specific implementation of step S660 can be found in the description of step S340 in the foregoing embodiments.

[0101] The insulation resistance-based early warning mechanism described above can detect potential coolant leakage risks in advance, as coolant leakage can lead to a decrease in the insulation performance of the battery pack. A pop-up notification reminds the user to perform a leak detection, prompting them to take timely action and adjust the battery pack's orientation to obtain more accurate leak detection results. This not only improves the timeliness and accuracy of detection but also enhances vehicle safety, helping users identify problems early in the coolant leakage process and avoid serious consequences such as battery short circuits or thermal runaway caused by leakage, thereby ensuring safe vehicle operation and extending the battery pack's lifespan.

[0102] Based on the same inventive concept, embodiments of the present invention also provide a battery pack coolant leakage detection device for detecting battery pack coolant leakage. Figure 7 This is a structural block diagram of a battery pack coolant leakage detection device provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the device 700 includes: The first acquisition module 710 is used to acquire the first leakage detection result of the leakage detection device after the vehicle is started. The attitude adjustment module 720 is used to adjust the attitude of the battery pack if the first leakage detection result is leakage, so that the leakage liquid in the battery pack will collect at the leakage detection device in the event of leakage. The second acquisition module 730 is used to acquire the second leakage detection result of the leakage detection device after the attitude adjustment of the battery pack; The determination module 740 is used to determine coolant leakage in the battery pack based on the first leakage detection result and the second leakage detection result.

[0103] In some embodiments, the attitude adjustment module 720 is used to: The vehicle speed is reduced to a preset threshold, and the height of the vehicle suspension is adjusted to adjust the battery pack to the target posture. When the battery pack is in the target posture, if leakage occurs, the leakage will converge towards the location of the leakage detection device under the action of gravity.

[0104] In some embodiments, the vehicle includes four suspensions located at the four wheels of the vehicle, the battery pack includes a battery pack housing, and the leakage detection device includes four leakage detection devices located at the four bottom corners of the battery pack housing.

[0105] The attitude adjustment module 720 is used to adjust the height of the vehicle suspension to adjust the battery pack to a target attitude for: One of the four suspensions is adjusted to the lowest point in sequence, while the other three are adjusted to the highest point, so that the battery pack is in four different target postures in sequence, and the battery pack is in each target posture for a set time. When the battery pack is in the four different target postures, the leaking liquid will converge to the location of the four leak detection devices in sequence under the action of gravity.

[0106] In some embodiments, the second acquisition module 730 is used for: The leakage detection results of four leakage detection devices are obtained sequentially; the second leakage detection result is determined based on the leakage detection results of the four leakage detection devices.

[0107] In some embodiments, when the second acquisition module 730 determines the second leakage detection result based on the leakage detection results of the four leakage detection devices, it is used to: If any one of the four leakage detection devices detects a leak, then the second leakage detection result is determined to be a leak.

[0108] In some embodiments, the determining module 740 is used to: If both the first and second leak detection results indicate leakage, it is determined that the battery pack is leaking coolant.

[0109] In some embodiments, the device 700 may further include a first pop-up module for: Before adjusting the battery pack's orientation, if the first leak detection result indicates a leak, a first pop-up window is generated and displayed. The first pop-up window is used to remind the user that the battery pack may have coolant leakage and that active leak detection is required. The system also receives a first leak detection command generated by the user based on the first pop-up window. The first leak detection command is used to indicate that the battery pack's orientation needs to be adjusted to obtain a second leak detection result.

[0110] In some embodiments, the device 700 may further include a second pop-up module for: After the vehicle is started, a second pop-up window is generated and displayed at preset time intervals. The second pop-up window is used to remind the user that a leak detection is required. The system receives a second leak detection command generated by the user based on the second pop-up window. The second leak detection command is used to indicate that the battery pack's posture needs to be adjusted to obtain the second leak detection result.

[0111] In some embodiments, the device 700 may further include a third pop-up module for: After the vehicle is started, the insulation resistance value of the battery pack is obtained; a third pop-up window is generated and displayed based on the insulation resistance value. The third pop-up window is used to remind the user that the insulation resistance value detection is abnormal and leakage detection is required; the third leakage detection command generated by the user based on the third pop-up window is received. The third leakage detection command is used to indicate that the battery pack posture needs to be adjusted to obtain the second leakage detection result.

[0112] In some embodiments, the device 700 may further include a fourth pop-up module for: A fourth pop-up window is generated and displayed to remind the user that the battery pack is leaking.

[0113] In some embodiments, the leakage detection device includes a drain valve and a pressure sensor. The drain valve has a receiving cavity for collecting the leaked liquid, and the pressure sensor is used to detect the pressure generated by the leaked liquid in the receiving cavity. The first acquisition module 710 is used for: Acquire the first pressure value detected by the pressure sensor; determine the first leakage detection result based on the first pressure value, the first leakage result including leakage and no leakage.

[0114] In some embodiments, when the first acquisition module 710 determines the first leakage detection result based on the first pressure value, it is used to: if the first pressure value is greater than a preset leakage pressure threshold, determine the first leakage result as leakage.

[0115] The specific details of the detection method used in the above-mentioned detection device can be understood by referring to the relevant descriptions and effects in the above-described embodiments of the battery pack coolant leakage detection method, and will not be repeated here.

[0116] Based on the same inventive concept as the aforementioned battery pack coolant leakage detection method, this invention also provides an electronic device, which may include a processor and a memory, wherein the processor and memory can communicate with each other via a bus or other means. The processor may be a Central Processing Unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations thereof. The memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the battery pack coolant leakage detection method in this embodiment. The processor executes various functional applications and data processing by running the non-transitory software programs, instructions, and modules stored in the memory, thereby realizing the battery pack coolant leakage detection in the above method embodiments.

[0117] The memory may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created by the processor, etc. Furthermore, the memory may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. The one or more modules are stored in the memory and, when executed by the processor, perform actions such as... Figure 3 The embodiment shown illustrates a method for detecting coolant leakage in a battery pack.

[0118] For specific details regarding the aforementioned electronic devices, please refer to the relevant documentation. Figure 1 The relevant descriptions and effects in the illustrated embodiments are for understanding purposes only and will not be repeated here.

[0119] Based on the same inventive concept as the method for detecting battery pack coolant leakage, the present invention also provides a computer-readable storage medium storing computer instructions, which are used to cause a computer to execute the method for detecting battery pack coolant leakage in the above embodiments.

[0120] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The storage medium can be read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0121] The technical solutions provided in the above embodiments of this application have at least the following technical effects or advantages: This invention provides a method, apparatus, device, and storage medium for detecting coolant leakage in a battery pack. By employing a combination of active and passive detection methods to cross-verify the leak, the accuracy of the detection is effectively improved. Specifically, after the vehicle is started, a first leak detection result from the leak detection device is acquired—a passive leak detection. When a leak is initially detected, the battery pack's orientation is adjusted to allow the leaking fluid to converge on the leak detection device, and a second leak detection result is then acquired. This active orientation adjustment ensures that the leaking fluid makes more thorough contact with the leak detection device, thereby improving the reliability of the detection. A comprehensive judgment based on the first and second leak detection results allows for a more accurate determination of whether the battery pack coolant is actually leaking. This dual detection mechanism not only improves the reliability of coolant leak detection but also enables timely detection of leaks, preventing safety hazards such as battery short circuits and thermal runaway caused by leaks. This protects the driver's property and personal safety and enhances the user experience.

[0122] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0123] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0124] It should be noted that the above embodiments are illustrative of the invention and not restrictive of the invention, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims.

Claims

1. A method for detecting coolant leakage in a battery pack, characterized in that, The battery pack includes a leakage detection device for detecting whether the battery pack is leaking, and the method includes: After the vehicle is started, the first leakage detection result of the leakage detection device is obtained; If the first leakage detection result is leakage, the attitude of the battery pack is adjusted so that, in the event of leakage, the leakage liquid collects at the leakage detection device. Obtain the second leakage detection result of the leakage detection device after the attitude adjustment of the battery pack; Based on the first leakage detection result and the second leakage detection result, it is determined whether the coolant in the battery pack is leaking.

2. The method according to claim 1, characterized in that, The adjustment of the battery pack's attitude includes: The vehicle speed is reduced to a preset threshold, and the height of the vehicle suspension is adjusted to adjust the battery pack to the target posture. When the battery pack is in the target posture, if leakage occurs, the leakage will converge towards the location of the leakage detection device under the action of gravity.

3. The method according to claim 2, characterized in that, The vehicle includes four suspensions located on the four wheels of the vehicle, the battery pack includes a battery pack housing, and the leakage detection device includes four leakage detection devices located at the four bottom corners of the battery pack housing; The adjustment of the vehicle suspension height to adjust the battery pack to the target attitude includes: One of the four suspensions is adjusted to the lowest point and the other three to the highest point in sequence, so that the battery pack is in four different target postures in sequence, and each target posture is maintained for a set time; wherein, when the battery pack is in the four different target postures, the leaked liquid will converge to the location of the four leak detection devices in sequence under the action of gravity.

4. The method according to claim 3, characterized in that, The step of obtaining the second leakage detection result of the leakage detection device after the attitude adjustment of the battery pack includes: The leakage detection results of the four leakage detection devices are obtained sequentially. The second leakage detection result is determined based on the leakage detection results of the four leakage detection devices.

5. The method according to claim 4, characterized in that, Determining the second leakage detection result based on the leakage detection results of the four leakage detection devices includes: If the leakage detection result of any one of the four leakage detection devices is leakage, then the second leakage detection result is determined to be leakage.

6. The method according to claim 1, characterized in that, The step of determining whether the coolant in the battery pack is leaking based on the first leak detection result and the second leak detection result includes: If both the first and second leakage detection results indicate leakage, it is determined that the battery pack is leaking coolant.

7. The method according to claim 1, characterized in that, Before adjusting the orientation of the battery pack, the method further includes: If the first leak detection result is a leak, a first pop-up window is generated and displayed. The first pop-up window is used to remind the user that the battery pack may have coolant leakage and that active leak detection is required. The system receives a first leakage detection command generated by the user based on the first pop-up window. The first leakage detection command is used to indicate that the posture of the battery pack needs to be adjusted to obtain a second leakage detection result.

8. The method according to claim 1, characterized in that, The method further includes: After the vehicle is started, a second pop-up window is generated and displayed at preset time intervals. The second pop-up window is used to remind the user that a leak detection is required. The system receives a second leakage detection command generated by the user based on the second pop-up window. The second leakage detection command is used to indicate that the attitude of the battery pack needs to be adjusted to obtain a second leakage detection result.

9. The method according to claim 1, characterized in that, The method further includes: After the vehicle is started, the insulation resistance value of the battery pack is obtained; A third pop-up window is generated and displayed based on the insulation resistance value. The third pop-up window is used to remind the user that the insulation resistance value is abnormal and leakage detection is required. Receive a third leakage detection command generated by the user based on the third pop-up window. The third leakage detection command is used to indicate that the attitude of the battery pack needs to be adjusted to obtain a second leakage detection result.

10. The method according to claim 1, characterized in that, After determining that the battery pack has a coolant leak, the method further includes: A fourth pop-up window is generated and displayed, which is used to remind the user that the battery pack has leaked.

11. The method according to claim 1, characterized in that, The leakage detection device includes a drain valve and a pressure sensor. The drain valve has a receiving cavity for collecting the leakage, and the pressure sensor is used to detect the pressure generated by the leakage in the receiving cavity. The step of obtaining the first leakage detection result of the leakage detection device includes: Obtain the first pressure value detected by the pressure sensor; The first leakage detection result is determined based on the first pressure value, and the first leakage result includes leakage and no leakage.

12. The method according to claim 11, characterized in that, Determining the first leakage detection result based on the first pressure value includes: If the first pressure value is greater than the preset leakage pressure threshold, the first leakage result is determined to be a leakage.

13. A device for detecting coolant leakage in a battery pack, characterized in that, The battery pack includes a leakage detection device for detecting whether the battery pack is leaking, the device comprising: The first acquisition module is used to acquire the first leakage detection result of the leakage detection device after the vehicle is started. An attitude adjustment module is used to adjust the attitude of the battery pack if the first leakage detection result is leakage, so that the leakage of the battery pack will converge at the leakage detection device in the event of leakage. The second acquisition module is used to acquire the second leakage detection result of the leakage detection device after the attitude adjustment of the battery pack; The determination module is used to determine the coolant leakage of the battery pack based on the first leakage detection result and the second leakage detection result.

14. An electronic device, characterized in that, include: The device includes a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the battery pack coolant leakage detection method as described in any one of claims 1 to 12.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the battery pack coolant leakage detection method according to any one of claims 1 to 12.

Images