Method, device and medium for detecting operating state of battery cooling system of vehicle

Abstract

The application discloses a kind of battery cooling system operating state detection method, device and medium of vehicle, the method includes: in the charging process of vehicle battery, when satisfying the preset battery cooling system operating state detection condition, the heat exchange state of the battery cooling system Whether it satisfies preset heat exchange state threshold condition;If the heat exchange state of the battery cooling system satisfies preset heat exchange state threshold condition, it is determined that the operating state of the battery cooling system is normal;If the heat exchange state of the battery cooling system does not satisfy preset heat exchange state threshold condition, it is determined that the operating state of the battery cooling system is abnormal.The battery cooling system operating state can be detected by the application, to improve the robustness of battery cooling system operating state detection in charging process, guarantee the charging safety of battery.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a method, apparatus, and medium for detecting the operating status of a vehicle's battery cooling system. Background Technology

[0002] Currently, electric vehicle battery cooling systems generally employ liquid cooling. During DC charging, if the battery cooling system fails to cool effectively or even completely due to insufficient liquid, leakage, or component malfunction, continuing to use the original charging rate will lead to problems such as excessively high battery temperature and large temperature differences. Battery thermal management is crucial for battery performance and safety. Excessive temperature differences can cause the battery to underperform due to the bottleneck effect, resulting in a poor customer experience. Furthermore, excessively high battery temperature can trigger overheating alarms due to cooling failure, and in severe cases, thermal runaway can lead to smoke and fire.

[0003] Therefore, in the existing technology, the working status of the battery cooling system is detected in real time to determine whether the cooling system is faulty. When the battery cooling system fails, the charging rate of the battery is adjusted according to the fault level of the battery cooling system to prevent the battery temperature from being too high or the temperature difference from being too large.

[0004] However, in the process of implementing this invention, the inventors discovered that the prior art has at least the following problems: when the working status detection of the battery cooling system fails, the battery cooling system malfunctions but cannot be detected, so the charging rate of the battery cannot be adjusted in time, which will still lead to the battery temperature being too high and the temperature difference being too large during the DC charging process of electric vehicles, affecting the safety of battery charging. Summary of the Invention

[0005] The purpose of this invention is to provide a method, device, and medium for detecting the operating status of a vehicle's battery cooling system, which can indirectly detect the operating status of the battery cooling system to improve the robustness of detecting the operating status of the battery cooling system during charging and ensure battery charging safety.

[0006] To achieve the above objectives, embodiments of the present invention provide a method for detecting the operating status of a vehicle's battery cooling system, comprising:

[0007] During the charging process of the vehicle battery, when the preset battery cooling system working state detection conditions are met, the heat exchange state of the battery cooling system is detected to see if it meets the preset heat exchange state threshold conditions.

[0008] If the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, the battery cooling system is determined to be in normal working condition.

[0009] If the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition, the working state of the battery cooling system is determined to be abnormal.

[0010] As an improvement to the above solution, the heat exchange state includes the heat exchange rate. Therefore, during the charging process of the vehicle battery, when the preset battery cooling system operating state detection conditions are met, detecting whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold conditions specifically includes:

[0011] During the charging process of the vehicle battery, when the preset battery cooling system operating status detection conditions are met, the temperature difference between the inlet and outlet of the battery cooling system is detected.

[0012] Determine whether the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold.

[0013] As an improvement to the above solution, the heat exchange state also includes the amount of heat exchanged, and when it is determined that the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold, then the step of detecting whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition when the preset battery cooling system operating state detection condition is met during the charging process of the vehicle battery further includes:

[0014] Detect the temperature drop rate at the inlet of the battery cooling system;

[0015] Determine whether the inlet temperature drop rate is greater than or equal to a preset standard temperature drop rate threshold.

[0016] As an improvement to the above solution, the detection of the temperature drop rate at the inlet of the battery cooling system specifically includes:

[0017] When the current inlet temperature of the battery cooling system is greater than the preset target temperature threshold, the inlet temperature drop rate of the battery cooling system is detected.

[0018] As an improvement to the above solution, the detection of the temperature difference between the inlet and outlet of the battery cooling system specifically includes:

[0019] The current inlet temperature of the battery cooling system is detected and recorded as the first inlet temperature;

[0020] After a preset time period, the current inlet temperature and outlet temperature of the battery cooling system are detected and recorded as the second inlet temperature and the second outlet temperature.

[0021] According to the calculation formula ΔT=T out2 -T in2 Calculate the inlet and outlet water temperature difference of the battery cooling system; where ΔT is the inlet and outlet water temperature difference, and T is the outlet water temperature difference. out2The temperature at the second outlet, T in2 This refers to the temperature at the second inlet.

[0022] As an improvement to the above solution, the detection of the temperature drop rate at the inlet of the battery cooling system specifically includes:

[0023] According to the calculation formula θ=(T) in1 -T in2 ) / Δt, calculate the inlet temperature difference rate of the battery cooling system; where θ is the inlet temperature difference rate, T in1 Δt represents the temperature at the first inlet, and Δt represents the preset time.

[0024] As an improvement to the above solution, after determining that the battery cooling system is in an abnormal operating state, the method further includes:

[0025] The charging rate of the battery is adjusted based on the battery temperature, the temperature drop rate at the inlet of the battery cooling system, and the temperature difference between the inlet and outlet of the battery cooling system, in order to reduce the battery temperature during the charging process.

[0026] As an improvement to the above solution, the preset battery cooling system operating status detection conditions include: the battery cooling system operating status detection device malfunctions.

[0027] Before detecting whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, the method further includes:

[0028] During the charging process of the vehicle battery, the working status information of the battery cooling system sent by the working status detection device is acquired, and the temperature of the battery is detected.

[0029] When the operating status information indicates that the battery cooling system is in an abnormal operating state, or when the operating status information indicates that the battery cooling system is in a normal operating state and the battery temperature is less than or equal to a preset battery temperature threshold, it is determined that the battery cooling system operating status detection device is not faulty.

[0030] When the operating status information indicates that the battery cooling system is operating normally and the battery temperature is greater than a preset battery temperature threshold, the operating status detection device of the battery cooling system is determined to be faulty.

[0031] As an improvement to the above solution, the step of acquiring the operating status information of the battery cooling system sent by the operating status detection device during the charging process of the vehicle battery specifically includes:

[0032] During the charging process of the vehicle battery, it is determined whether the operating conditions of the battery cooling system have been met;

[0033] After the operating conditions of the battery cooling system are met, the operating status information of the battery cooling system sent by the operating status detection device is obtained.

[0034] This invention also provides a device for detecting the operating status of a vehicle's battery cooling system, comprising:

[0035] The threshold condition detection module is used to detect whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition when the preset battery cooling system working state detection condition is met during the charging process of the vehicle battery.

[0036] The operating status determination module is used to determine that the operating status of the battery cooling system is normal if the heat exchange status of the battery cooling system meets a preset heat exchange status threshold condition; and,

[0037] If the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition, the working state of the battery cooling system is determined to be abnormal.

[0038] This invention also provides a device for detecting the operating status of a vehicle's battery cooling system, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the method for detecting the operating status of a vehicle's battery cooling system as described in any of the preceding embodiments.

[0039] This invention also provides a computer-readable storage medium, which includes a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the operating status detection method of the vehicle's battery cooling system as described in any of the preceding embodiments.

[0040] Compared with existing technologies, this invention discloses a method, device, and medium for detecting the operating status of a vehicle battery cooling system. During the charging process of the vehicle battery, when preset battery cooling system operating status detection conditions are met, the method detects whether the heat exchange state of the battery cooling system meets a preset heat exchange state threshold condition. If the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, the operating status of the battery cooling system is determined to be normal; if the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition, the operating status of the battery cooling system is determined to be abnormal. Using this embodiment, the operating status of the battery cooling system is indirectly determined by detecting whether the heat exchange state of the battery cooling system is normal. When the vehicle system is equipped with a battery cooling system operating status detection device, it can also serve as an auxiliary means to determine the operating status of the battery cooling system, improving the robustness of battery cooling system operating status detection during charging, maximizing the detection of abnormal states of the battery cooling system during DC charging, and realizing state monitoring of the battery cooling system. Therefore, in the case of abnormal operating states of the battery cooling system, parameters such as the battery charging rate can be adjusted in a timely manner to reduce the safety risks of DC charging of the vehicle, further ensuring battery charging safety and improving the user's driving experience. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 1 of the present invention;

[0042] Figure 2 This is a schematic diagram of the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 2 of the present invention;

[0043] Figure 3 This is a schematic diagram of the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 3 of the present invention;

[0044] Figure 4 This is a schematic diagram of the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 4 of the present invention;

[0045] Figure 5 This is a schematic diagram of the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 5 of the present invention;

[0046] Figure 6 This is a schematic diagram of the working status detection device for a vehicle battery cooling system provided in Embodiment Six of the present invention;

[0047] Figure 7 This is a schematic diagram of the working status detection device for a vehicle battery cooling system provided in Embodiment 7 of the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] See Figure 1 This is a schematic diagram illustrating the steps of a method for detecting the operating status of a vehicle's battery cooling system according to Embodiment 1 of the present invention. The method for detecting the operating status of a vehicle's battery cooling system according to Embodiment 1 of the present invention is executed through steps S11 to S13:

[0050] S11. During the charging process of the vehicle battery, when the preset battery cooling system working state detection conditions are met, the heat exchange state of the battery cooling system is detected to meet the preset heat exchange state threshold conditions.

[0051] Specifically, when the vehicle battery is charging, the battery cooling system cools the battery. In this embodiment of the invention, it is first determined whether a preset battery cooling system operating state detection condition is met, and if the detection condition is met, the operating state of the battery cooling system is detected.

[0052] It should be noted that the preset battery cooling system operating status detection conditions can be that the current battery charging state reaches the operating start condition of the battery cooling system, that is, the battery cooling system is in operation; or it can be that a user inputs a detection command for the battery cooling system operating status is received; or it can be that the battery cooling system operating status detection device preset in the vehicle system fails, etc., none of which will affect the beneficial effects obtained by the present invention.

[0053] S12. If the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, the working state of the battery cooling system is determined to be normal.

[0054] S13. If the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition, the working state of the battery cooling system is determined to be abnormal.

[0055] In this embodiment of the invention, a heat exchange state threshold condition for the battery cooling system is preset to characterize the heat exchange state that the battery cooling system should achieve when its operating state is normal. Furthermore, when the preset battery cooling system operating state detection condition is met, the current heat exchange state of the battery cooling system is detected and compared with the preset heat exchange state threshold condition to determine whether the battery cooling system is operating normally.

[0056] By employing the technical means of this invention, the operating state of the battery cooling system is indirectly determined by detecting whether the heat exchange state of the battery cooling system meets a preset heat exchange state threshold condition. Even when the vehicle system is equipped with a battery cooling system operating state detection device, this can still serve as an auxiliary means to determine the operating state of the battery cooling system, improving the robustness of battery cooling system operating state detection during charging and further ensuring battery charging safety.

[0057] See Figure 2 This is a schematic diagram illustrating the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 2 of the present invention. Embodiment 2 of the present invention is a further implementation based on Embodiment 1.

[0058] In this embodiment of the invention, the heat exchange state includes the heat exchange rate.

[0059] Then step S11 is specifically executed through steps S21 to S22:

[0060] S21. During the charging process of the vehicle battery, when the preset battery cooling system working status detection conditions are met, the temperature difference between the inlet and outlet of the battery cooling system is detected.

[0061] S22. Determine whether the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold.

[0062] Preferably, detecting the temperature difference between the inlet and outlet of the battery cooling system specifically includes:

[0063] Starting from the current time, after a preset time period, the inlet and outlet temperatures of the battery cooling system are detected and recorded as the second inlet temperature and the second outlet temperature; according to the calculation formula ΔT = T out2 -T in2 Calculate the inlet and outlet water temperature difference of the battery cooling system; where ΔT is the inlet and outlet water temperature difference, and T is the outlet water temperature difference. out2 The temperature at the second outlet, T in2 This refers to the temperature at the second inlet.

[0064] In this embodiment of the invention, the normal operating status of the battery cooling system is determined by detecting whether the heat exchange rate of the battery cooling system is normal. The heat exchange rate of the battery cooling system is characterized by the temperature difference between the inlet and outlet of the battery cooling system.

[0065] Specifically, a standard temperature difference threshold is preset for the temperature difference between the inlet and outlet of the battery cooling system, which is used to confirm the temperature range of the temperature difference between the inlet and outlet of the battery cooling system when the battery cooling system is working normally.

[0066] Furthermore, when the preset battery cooling system operating status detection conditions are met, the current time is recorded as t1, and the system waits for a preset time Δt. After the preset time has elapsed, the inlet and outlet temperatures of the battery cooling system at the current time (t1+Δt) are detected to obtain the second inlet temperature T. in2 Second outlet temperature T out2 Thus, the temperature difference ΔT between the inlet and outlet of the battery cooling system can be calculated.

[0067] When the temperature difference between the inlet and outlet is less than or equal to the preset standard temperature difference threshold, i.e., ΔT ≤ ΔT normal When the temperature difference between the inlet and outlet of the battery cooling system is normal, it is determined that the heat exchange rate of the battery cooling system is normal, and thus the working state of the battery cooling system is normal; when the temperature difference between the inlet and outlet is greater than the preset standard temperature difference threshold, that is, ΔT > ΔT normal If the temperature difference between the inlet and outlet of the battery cooling system is abnormal, that is, the heat exchange rate of the battery cooling system is abnormal, then the working state of the battery cooling system is abnormal.

[0068] By employing the technical means of this invention, the reasonableness of the temperature difference between the inlet and outlet of the battery cooling system within a certain period of time is determined to confirm whether the heat exchange rate of the battery cooling system is normal, thereby realizing the detection of the working status of the battery cooling system. This effectively ensures the detection of abnormal working status of the battery cooling system and enables the monitoring of the battery cooling system.

[0069] See Figure 3 This is a schematic diagram illustrating the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 3 of the present invention. Embodiment 3 of the present invention is a further implementation based on Embodiment 2.

[0070] In this embodiment of the invention, the heat exchange state further includes the amount of heat exchanged.

[0071] Furthermore, when it is determined that the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold, step S11 further includes steps S31 to S32:

[0072] S31. Detect the temperature drop rate at the inlet of the battery cooling system;

[0073] S32. Determine whether the inlet temperature drop rate is greater than or equal to the preset standard temperature drop rate threshold.

[0074] Preferably, detecting the temperature drop rate at the inlet of the battery cooling system specifically includes:

[0075] The current inlet temperature of the battery cooling system is detected and recorded as the first inlet temperature;

[0076] After a preset time period, the current inlet temperature of the battery cooling system is detected and recorded as the second inlet temperature.

[0077] According to the calculation formula θ=(T) in1 -T in2 ) / Δt, calculate the inlet temperature difference rate of the battery cooling system; where θ is the inlet temperature difference rate, T in1 Δt represents the temperature at the first inlet, and Δt represents the preset time.

[0078] In this embodiment of the invention, after determining that the heat exchange rate of the battery cooling system is normal, the working state of the battery cooling system is further determined by detecting whether the heat exchange of the battery cooling system is normal. The heat exchange of the battery cooling system is characterized by the temperature drop rate at the inlet of the battery cooling system.

[0079] Specifically, a standard temperature drop rate threshold is preset for the temperature drop rate of the inlet and outlet of the battery cooling system, which is used to confirm the temperature drop rate range of the inlet and outlet of the battery cooling system when the battery cooling system is working normally.

[0080] During the charging process of the vehicle battery, when the preset battery cooling system operating status detection conditions are met, the temperature difference ΔT between the inlet and outlet of the battery cooling system is detected, and it is determined whether the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold. When it is determined that the temperature difference between the inlet and outlet is less than or equal to the preset standard temperature difference threshold, it indicates that the heat exchange rate of the battery cooling system is normal. Then, the temperature drop rate θ at the inlet of the battery cooling system is further detected, and it is determined whether the temperature drop rate at the inlet is greater than or equal to a preset standard temperature drop rate threshold.

[0081] If the inlet temperature drop rate is greater than or equal to the preset standard temperature drop rate threshold, that is, if θ ≥ θ normalWhen the inlet temperature drop rate of the battery cooling system is normal, it is determined that the heat exchange of the battery cooling system is normal, and thus the working state of the battery cooling system is normal. If the inlet temperature drop rate is less than the preset standard temperature drop rate threshold, that is, if θ < θ normal If the temperature drop rate at the inlet of the battery cooling system is abnormal, that is, the heat exchange of the battery cooling system is abnormal, then the working state of the battery cooling system is abnormal.

[0082] By employing the technical means of the embodiments of the invention, based on determining that the heat exchange rate of the battery cooling system is normal, the reasonableness of the temperature drop rate of the inlet and outlet of the battery cooling system within a certain period of time is judged to confirm whether the heat exchange of the battery cooling system is normal. This allows for more accurate detection of the working status of the battery cooling system, effectively ensuring the detection of abnormal working states of the battery cooling system and realizing the monitoring of the battery cooling system.

[0083] In a preferred embodiment, step S31, namely detecting the temperature drop rate at the inlet of the battery cooling system, specifically includes:

[0084] S311. When the current inlet temperature of the battery cooling system is greater than the preset target temperature threshold, the inlet temperature drop rate of the battery cooling system is detected.

[0085] In this embodiment of the invention, after detecting that the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold, that is, after the heat exchange rate of the battery cooling system is normal, the initial inlet temperature of the battery cooling system, that is, the first inlet temperature T, is first measured. in1 The rationality and effectiveness are judged. By pre-setting a target temperature threshold for the inlet temperature of the battery cooling system at the initial moment, the temperature range of the inlet and outlet temperature difference of the battery cooling system at the initial moment is confirmed when the battery cooling system is working normally.

[0086] If the temperature at the first inlet is greater than the preset target temperature threshold, i.e., T in1 >T tgt If the temperature at the first inlet is abnormal, the temperature drop rate at the inlet of the battery cooling system will be further detected. Then, the working status of the battery cooling system will be determined by combining the temperature drop rate at the inlet of the battery cooling system.

[0087] If the temperature at the first inlet is less than or equal to the preset target temperature threshold, i.e., T in1 ≤T tgtIf the temperature at the first inlet is normal, it indicates that the heat exchange rate of the battery cooling system is normal. Therefore, it is not necessary to test the temperature drop rate of the inlet of the battery cooling system. Based on the judgment that the heat exchange rate of the battery cooling system is normal, it is determined that the working state of the battery cooling system is normal.

[0088] By employing the technical means of the embodiments of the invention, based on determining that the heat exchange rate of the battery cooling system is normal, a preliminary judgment is made on whether the heat exchange of the battery cooling system is normal by judging the reasonableness of the inlet temperature at the initial moment. Furthermore, when the inlet temperature is abnormal at the initial moment, the reasonableness of the inlet and outlet temperature drop rates of the battery cooling system over a certain period of time is used to confirm whether the heat exchange of the battery cooling system is normal. This allows for more accurate detection of the operating status of the battery cooling system, effectively ensuring the detection of abnormal operating states and achieving monitoring of the battery cooling system.

[0089] See Figure 4 This is a schematic diagram illustrating the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 4 of the present invention. Embodiment 4 of the present invention is a further implementation based on any one of Embodiments 1 to 3.

[0090] The method for detecting the operating status of a vehicle's battery cooling system provided in Embodiment 4 of the present invention is specifically executed through steps S41 to S44:

[0091] S41. During the charging process of the vehicle battery, when the preset battery cooling system working state detection conditions are met, the heat exchange state of the battery cooling system is detected to meet the preset heat exchange state threshold conditions.

[0092] S42. If the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, the working state of the battery cooling system is determined to be normal.

[0093] S43. If the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition, the working state of the battery cooling system is determined to be abnormal.

[0094] It should be noted that steps S41 to S43 in the embodiments of the present invention correspond one-to-one with steps S11 to S13 in the above embodiments one to three. The execution principle and the beneficial effects achieved by both are similar, and will not be repeated here.

[0095] S44. After determining that the working state of the battery cooling system is abnormal, adjust the charging rate of the battery according to the battery temperature, the inlet temperature drop rate of the battery cooling system, and the inlet-outlet temperature difference of the battery cooling system, so as to reduce the temperature of the battery during the charging process.

[0096] It should be noted that the detection methods for the inlet temperature drop rate and the inlet-outlet temperature difference of the battery cooling system include:

[0097] The current inlet temperature of the battery cooling system is detected and recorded as the first inlet temperature;

[0098] After a preset time period, the current inlet temperature and outlet temperature of the battery cooling system are detected and recorded as the second inlet temperature and the second outlet temperature.

[0099] According to the calculation formula ΔT=T out2 -T in2 Calculate the inlet and outlet water temperature difference of the battery cooling system; where ΔT is the inlet and outlet water temperature difference, and T is the outlet water temperature difference. out2 The temperature at the second outlet, T in2 This refers to the temperature at the second inlet.

[0100] According to the calculation formula θ=(T) in1 -T in2 ) / Δt, calculate the inlet temperature difference rate of the battery cooling system; where θ is the inlet temperature difference rate, T in1 Δt represents the temperature at the first inlet, and Δt represents the preset time.

[0101] Using the technical means of this invention, when the battery cooling system is determined to be malfunctioning, it cannot cool the vehicle battery during normal charging. To avoid the battery temperature becoming too high or the temperature difference too large due to charging at the original charging rate, the battery charging rate is intelligently adjusted based on the battery temperature, the inlet temperature drop rate of the battery cooling system, and the temperature difference between the inlet and outlet, taking into account battery safety conditions and charging time. This allows for a proactive reduction of the battery charging rate when the malfunction of the battery cooling system is indirectly detected, preventing battery overheating or large temperature differences, reducing the safety risks of DC charging, ensuring battery safety, and ultimately improving the user experience.

[0102] Preferably, after determining that the battery cooling system is in an abnormal operating state, the fault code of the battery cooling system is recorded and uploaded to the big data platform to assist users in screening faulty vehicles, issuing warnings, and guiding maintenance.

[0103] See Figure 5 This is a schematic diagram illustrating the steps of a method for detecting the working status of a vehicle's battery cooling system according to Embodiment 5 of the present invention. Embodiment 5 of the present invention is implemented based on any of the embodiments 1 to 4.

[0104] The preset battery cooling system operating status detection conditions include: the battery cooling system operating status detection device malfunctions.

[0105] Before step S11, the method for detecting the operating status of the vehicle's battery cooling system further includes steps S51 to S53:

[0106] S51. During the charging process of the vehicle battery, the working status information of the battery cooling system sent by the working status detection device is obtained, and the temperature of the battery is detected.

[0107] S52. When the operating status information indicates that the battery cooling system is in an abnormal operating state, or when the operating status information indicates that the battery cooling system is in a normal operating state and the battery temperature is less than or equal to a preset battery temperature threshold, it is determined that the battery cooling system operating status detection device is not faulty.

[0108] S53. When the operating status information indicates that the battery cooling system is operating normally and the battery temperature is greater than the preset battery temperature threshold, the operating status detection device of the battery cooling system is determined to be faulty.

[0109] In a preferred embodiment, step S51 specifically includes:

[0110] During the charging process of the vehicle battery, it is determined whether the operating conditions of the battery cooling system have been met;

[0111] After the operating conditions of the battery cooling system are met, the operating status information of the battery cooling system sent by the operating status detection device is obtained.

[0112] It should be noted that vehicles are typically equipped with a status monitoring device for directly detecting the operating status of the battery cooling system. During battery charging, when the operating conditions of the battery cooling system are met, the system will perform cooling and temperature-reducing operations based on the battery's state of charge to ensure charging safety. The battery cooling system status monitoring device directly detects the operating status of the battery cooling system to obtain its operational information. Furthermore, if an abnormality is detected in the battery cooling system, parameters such as the battery charging rate will be adjusted to prevent overheating and other issues.

[0113] In this embodiment of the invention, during the charging process of the vehicle battery, after detecting that the operating conditions of the battery cooling system are met, the operating status information of the battery cooling system detected by the battery cooling system operating status detection device is acquired in real time, and the temperature of the vehicle battery is detected simultaneously. Based on the temperature of the vehicle battery, it can be determined whether the actual operating status of the battery cooling system matches the acquired operating status information of the battery cooling system, thereby determining whether the operating status detection device of the battery cooling system is working properly.

[0114] If the operating status detection device detects a malfunction in the battery cooling system, or detects that the battery cooling system is operating normally and the vehicle battery temperature is stable within the normal temperature range, then the detection function of the operating status detection device is determined to be normal, i.e., not malfunctioning. If the operating status detection device detects that the battery cooling system is operating normally, but the vehicle battery temperature is too high, then the detection function of the operating status detection device is determined to be abnormal, i.e., malfunctioning.

[0115] By employing the technical means of this invention, the battery cooling system operation status detection method provided in this invention is used as an indirect detection method to assist the battery cooling system operation status detection device in detecting the operation status of the battery cooling system. When the direct detection method is determined to be ineffective, the operation status of the battery cooling system is determined to be normal by detecting whether the heat exchange state of the battery cooling system meets a preset heat exchange state threshold condition. This invention can maximize the detection of abnormal states of the battery cooling system during DC charging, realizing state monitoring of the battery cooling system. Therefore, based on the operation status and related parameters of the battery cooling system, parameters such as the battery charging rate can be adjusted in a timely manner to reduce the safety risks of DC charging of the vehicle, thereby improving the user's driving experience while ensuring battery safety.

[0116] See Figure 6 This is a schematic diagram of the structure of a vehicle battery cooling system operating status detection device according to Embodiment Six of the present invention. The present invention provides a vehicle battery cooling system operating status detection device 60, including: a threshold condition detection module 61 and an operating status judgment module 62; wherein,

[0117] The threshold condition detection module 61 is used to detect whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition when the preset battery cooling system working state detection condition is met during the charging process of the vehicle battery.

[0118] The working state determination module 62 is used to determine that the working state of the battery cooling system is normal if the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition; and to determine that the working state of the battery cooling system is abnormal if the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition.

[0119] In a preferred embodiment, the heat exchange state includes the heat exchange rate; therefore, the threshold condition detection module 61 is specifically used for:

[0120] During the charging process of the vehicle battery, when the preset battery cooling system operating status detection conditions are met, the temperature difference between the inlet and outlet of the battery cooling system is detected; it is then determined whether the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold.

[0121] In a preferred embodiment, the heat exchange state further includes the amount of heat exchanged.

[0122] When the threshold condition detection module 61 determines that the temperature difference between the inlet and outlet is less than or equal to the preset standard temperature difference threshold, it is also used to perform: detecting the temperature drop rate of the inlet of the battery cooling system; and determining whether the temperature drop rate of the inlet is greater than or equal to the preset standard temperature drop rate threshold.

[0123] Preferably, after the threshold condition detection module 61 determines that the temperature difference between the inlet and outlet is less than or equal to a preset standard temperature difference threshold, it is further configured to perform: when the current inlet temperature of the battery cooling system is greater than a preset target temperature threshold, detect the inlet temperature drop rate of the battery cooling system; and determine whether the inlet temperature drop rate is greater than or equal to a preset standard temperature drop rate threshold.

[0124] In a preferred embodiment, detecting the temperature difference between the inlet and outlet of the battery cooling system and the temperature drop rate at the inlet of the battery cooling system specifically includes:

[0125] The current inlet temperature of the battery cooling system is detected and recorded as the first inlet temperature;

[0126] After a preset time period, the current inlet temperature and outlet temperature of the battery cooling system are detected and recorded as the second inlet temperature and the second outlet temperature.

[0127] According to the calculation formula ΔT=T out2 -T in2 Calculate the inlet and outlet water temperature difference of the battery cooling system; where ΔT is the inlet and outlet water temperature difference, and T is the outlet water temperature difference. out2 The temperature at the second outlet, T in2 This refers to the temperature at the second inlet.

[0128] According to the calculation formula θ=(T)in1 -T in2 ) / Δt, calculate the inlet temperature difference rate of the battery cooling system; where θ is the inlet temperature difference rate, T in1 Δt represents the temperature at the first inlet, and Δt represents the preset time.

[0129] In a preferred embodiment, the battery cooling system operating status detection device 60 of the vehicle further includes: a charging rate adjustment module 63, used to adjust the charging rate of the battery according to the battery temperature, the inlet temperature drop rate of the battery cooling system and the inlet-outlet temperature difference of the battery cooling system, so as to reduce the temperature of the battery during the charging process.

[0130] As a preferred embodiment, the preset battery cooling system operating status detection conditions include: the battery cooling system operating status detection device malfunctions;

[0131] The vehicle battery cooling system operating status detection device 60 further includes: a detection device failure judgment module, used to perform the following before the threshold condition detection module 61 executes:

[0132] During the charging process of the vehicle battery, the working status information of the battery cooling system sent by the working status detection device is acquired, and the temperature of the battery is detected.

[0133] When the operating status information indicates that the battery cooling system is in an abnormal operating state, or when the operating status information indicates that the battery cooling system is in a normal operating state and the battery temperature is less than or equal to a preset battery temperature threshold, it is determined that the battery cooling system operating status detection device is not faulty.

[0134] When the operating status information indicates that the battery cooling system is operating normally and the battery temperature is greater than a preset battery temperature threshold, the operating status detection device of the battery cooling system is determined to be faulty.

[0135] Preferably, acquiring the operating status information of the battery cooling system sent by the operating status detection device during the charging process of the vehicle battery specifically includes:

[0136] During the charging process of the vehicle battery, it is determined whether the operating conditions of the battery cooling system have been met; after the operating conditions of the battery cooling system are met, the operating status information of the battery cooling system sent by the operating status detection device is obtained.

[0137] It should be noted that the vehicle battery cooling system working status detection device provided in this embodiment of the invention is used to execute all the process steps of the vehicle battery cooling system working status detection method in the above embodiment. The working principles and beneficial effects of the two are one-to-one, so they will not be described again.

[0138] See Figure 7 This is a schematic diagram of the structure of a vehicle battery cooling system operating status detection device provided in Embodiment 7 of the present invention. The present invention provides a vehicle battery cooling system operating status detection device 70, including a processor 71, a memory 72, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the vehicle battery cooling system operating status detection method as described in any one of Embodiments 1 to 5.

[0139] This invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the working state detection method of the vehicle's battery cooling system as described in any one of embodiments one to five.

[0140] Those skilled in the art will understand that all or part of the processes in 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 above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0141] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method of detecting an operating state of a battery cooling system of a vehicle, characterized by, The method comprises: In the charging process of the vehicle battery, when the preset battery cooling system working state detection condition is met, the heat exchange state of the battery cooling system is detected to determine whether the heat exchange state meets the preset heat exchange state threshold condition; if the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, it is determined that the working state of the battery cooling system is normal; if the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition, it is determined that the working state of the battery cooling system is abnormal. The heat exchange state includes heat exchange rate, and the detection of the heat exchange state of the battery cooling system in the charging process of the vehicle battery when the preset battery cooling system working state detection condition is met comprises: detecting the temperature difference between the inlet and outlet of the battery cooling system when the preset battery cooling system working state detection condition is met. The heat exchange state further includes heat exchange amount, and when it is determined that the temperature difference between the inlet and outlet of the battery cooling system is less than or equal to the preset standard temperature difference threshold, the detection of the heat exchange state of the battery cooling system in the charging process of the vehicle battery when the preset battery cooling system working state detection condition is met further comprises: detecting the temperature drop rate of the inlet of the battery cooling system; determining whether the temperature drop rate of the inlet of the battery cooling system is greater than or equal to the preset standard temperature drop rate threshold. If the temperature drop rate of the inlet of the battery cooling system is greater than or equal to the preset standard temperature drop rate threshold, it is determined that the heat exchange amount of the battery cooling system is normal, and it is determined that the working state of the battery cooling system is normal. If the temperature drop rate of the inlet of the battery cooling system is less than the preset standard temperature drop rate threshold, it is determined that the heat exchange amount of the battery cooling system is abnormal, and it is determined that the working state of the battery cooling system is abnormal.

2. The method of detecting an operating state of a battery cooling system of a vehicle according to claim 1, characterized in that, The detection of the temperature drop rate of the inlet of the battery cooling system comprises: detecting the temperature drop rate of the inlet of the battery cooling system when the current temperature of the inlet of the battery cooling system is greater than the preset target temperature threshold.

3. The method of claim 1, wherein The detection of the temperature difference between the inlet and outlet of the battery cooling system comprises: detecting the temperature of the inlet of the battery cooling system at the current time, denoted as the first inlet temperature; detecting the temperature of the inlet and the temperature of the outlet of the battery cooling system at the current time after a preset time period, denoted as the second inlet temperature and the second outlet temperature; calculating the temperature difference between the inlet and outlet of the battery cooling system according to the calculation formula ΔT=Tout2-Tin2; wherein ΔT is the temperature difference between the inlet and outlet, Tout2 is the second outlet temperature, and Tin2 is the second inlet temperature.

4. The method of detecting an operating state of a battery cooling system of a vehicle according to claim 3, characterized in that, The detection of the temperature drop rate of the inlet of the battery cooling system comprises: calculating the temperature difference rate of the inlet of the battery cooling system according to the calculation formula θ=(Tin1-Tin2) / Δt; wherein θ is the temperature difference rate of the inlet, Tin1 is the first inlet temperature, and Δt is the preset time period.

5. The method of claim 1, wherein After determining that the working state of the battery cooling system is abnormal, the method further comprises: adjusting the charging rate of the battery according to the temperature of the battery, the temperature drop rate of the water inlet of the battery cooling system, and the temperature difference between the water inlets and outlets of the battery cooling system, so as to reduce the temperature of the battery during charging.

6. The method of detecting an operating state of a battery cooling system of a vehicle according to claim 1, characterized in that, The preset battery cooling system working state detection condition comprises: failure of the working state detection device of the battery cooling system; therefore, before detecting whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, the method further comprises: obtaining the working state information of the battery cooling system sent by the working state detection device and detecting the temperature of the battery during the charging process of the vehicle battery; when the working state information indicates that the working state of the battery cooling system is abnormal, or the working state information indicates that the working state of the battery cooling system is normal and the temperature of the battery is less than or equal to the preset battery temperature threshold, it is determined that the working state detection device of the battery cooling system is not failed; when the working state information indicates that the working state of the battery cooling system is normal, and the temperature of the battery is greater than the preset battery temperature threshold, it is determined that the working state detection device of the battery cooling system is failed.

7. The method of claim 6, wherein the method further comprises: determining whether the battery is in a state of overdischarge, wherein the state of overdischarge is determined based on the state of charge of the battery and the state of charge of the battery is determined based on the voltage of the battery. The obtaining of the working state information of the battery cooling system sent by the working state detection device during the charging process of the vehicle battery specifically comprises: determining whether the operating condition of the battery cooling system is met during the charging process of the vehicle battery; and obtaining the working state information of the battery cooling system sent by the working state detection device after the operating condition of the battery cooling system is met.

8. A device for detecting the operating status of a vehicle's battery cooling system, characterized in that, Comprise: a threshold condition detection module configured to detect whether a heat exchange state of the battery cooling system meets a preset heat exchange state threshold condition when a preset battery cooling system working state detection condition is met during a charging process of a vehicle battery; a working state judgment module configured to determine that a working state of the battery cooling system is normal if the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition; and determine that the working state of the battery cooling system is abnormal if the heat exchange state of the battery cooling system does not meet the preset heat exchange state threshold condition; and the heat exchange state comprises a heat exchange rate, the detection of whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition when the preset battery cooling system working state detection condition is met during the charging process of the vehicle battery specifically comprises: detecting a temperature difference between water inlets and outlets of the battery cooling system when the preset battery cooling system working state detection condition is met during the charging process of the vehicle battery; and determining whether the temperature difference between the water inlets and outlets is less than or equal to a preset standard temperature difference threshold. ​ ​ The heat exchange state further includes a heat exchange amount, and when it is determined that the temperature difference between the water inlet and the water outlet is less than or equal to the preset standard temperature difference threshold, the method further includes: when the preset battery cooling system working state detection condition is met during the charging of the vehicle battery, detecting whether the heat exchange state of the battery cooling system meets the preset heat exchange state threshold condition, and the detecting the heat exchange state of the battery cooling system includes: detecting a water inlet temperature drop rate of the battery cooling system; If the water inlet temperature drop rate is greater than or equal to the preset standard temperature drop rate threshold, it is determined that the heat exchange amount of the battery cooling system is normal, and it is determined that the working state of the battery cooling system is normal; If the water inlet temperature drop rate is less than the preset standard temperature drop rate threshold, it is determined that the heat exchange amount of the battery cooling system is abnormal, and it is determined that the working state of the battery cooling system is abnormal.

9. A device for detecting the operating status of a vehicle's battery cooling system, characterized in that, The computer readable storage medium includes a stored computer program, wherein the computer readable storage medium controls a device in which the computer readable storage medium is located to execute the working state detection method of the battery cooling system of the vehicle according to any one of claims 1 to 7 when the computer program is executed.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium includes a stored computer program, wherein the computer readable storage medium controls a device in which the computer readable storage medium is located to execute the working state detection method of the battery cooling system of the vehicle according to any one of claims 1 to 7 when the computer program is executed.

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