Method and device for detecting insulativity of battery system

Abstract

The invention discloses an insulativity detection method and device for a battery system, and the method comprises the steps: obtaining first insulativity detection data in the battery system, placing the battery system in a high-temperature environment for standing for a first preset time, placing the battery system after standing for the first preset time in a low-temperature environment for a second preset time, taking out the battery system after the second preset time length and standing for a third preset time length to obtain second insulativity detection data in the battery system; and determining a target insulation state of the battery system according to a comparison result of the first insulation detection data and the second insulation detection data. The condensate water gathering problem of a battery system is recognized in advance, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and in particular relates to a method and device for detecting insulation properties of a battery system. Background Art

[0002] With the rapid development of the electric vehicle industry, the number of electric vehicles is increasing. As an important part of electric vehicles, the safety of the battery system is particularly important. During the use of the battery system, affected by extreme weather, driving conditions, and airtight failure, local condensation may occur inside the battery system, causing insulation failure inside the box. If it is not discovered in time during subsequent use, it is easy to cause insulation failure of the battery system, posing a huge safety hazard. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a method and device for detecting the insulation of a battery system, so as to detect the insulation status of the battery system before the battery system is used, identify the problem of condensation water accumulation in the battery system in advance, and reduce safety hazards.

[0004] The technical solution of this application is as follows:

[0005] In a first aspect, a method for detecting insulation of a battery system is provided, the method comprising:

[0006] Acquiring first insulation detection data inside the battery system;

[0007] The battery system is placed in a high temperature environment and left to stand for a first preset time, wherein a target area of ​​the battery system is coated with a thermal insulation material, the target area is an area where air flowability is greater than a preset flow threshold, a first sub-area in the target area is not coated with a thermal insulation material, and the high temperature environment is an environment where the temperature is greater than a first preset temperature threshold and the humidity is greater than a first preset humidity threshold;

[0008] placing the battery system after being stationary for the first preset time in a low temperature environment for a second preset time, wherein the low temperature environment is an environment with a temperature lower than a second preset temperature threshold;

[0009] After the battery system has been subjected to the second preset time, it is taken out and left to stand for a third preset time, and then second insulation detection data inside the battery system is obtained;

[0010] The first insulation detection data and the second insulation detection data are compared, and a target insulation state of the battery system is determined according to the comparison result.

[0011] In a second aspect, a battery system insulation detection device is provided, the device comprising:

[0012] An acquisition module, used for acquiring first insulation detection data inside the battery system;

[0013] a processing module, configured to place the battery system in a high temperature environment and leave it to stand for a first preset time, wherein a target area of ​​the battery system is coated with a heat preservation material, the target area is an area where air fluidity is greater than a preset flow threshold, a first sub-area in the target area is not coated with a heat preservation material, and the high temperature environment is an environment where the temperature is greater than a first preset temperature threshold and the humidity is greater than a first preset humidity threshold;

[0014] The processing module is further used to place the battery system after being stationary for the first preset time in a low temperature environment for a second preset time, wherein the low temperature environment is an environment with a temperature less than a second preset temperature threshold;

[0015] The acquisition module is further used to obtain second insulation detection data inside the battery system after taking out the battery system after the second preset time and leaving it to stand for a third preset time;

[0016] A determination module is used to compare the first insulation detection data with the second insulation detection data, and determine a target insulation state of the battery system according to the comparison result.

[0017] In a third aspect, an embodiment of the present application provides an insulation detection device for a battery system, the device comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the insulation detection method for the battery system described in any one of the embodiments of the present application.

[0018] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the insulation detection method of the battery system described in any one of the embodiments of the present application are implemented.

[0019] In a fifth aspect, an embodiment of the present application provides a vehicle, the vehicle comprising at least one of the following:

[0020] The insulation detection device of the battery system as described in the second aspect;

[0021] The insulation detection device of the battery system as described in the third aspect;

[0022] A computer-readable storage medium as described in the fourth aspect.

[0023] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0024] In an embodiment of the present application, by obtaining first insulation detection data inside the battery system, then placing the battery system in a high temperature environment and letting it stand for a first preset time, then placing the battery system in a low temperature environment and letting it stand for a second preset time, and then taking the battery system out and letting it stand for a third preset time, second insulation detection data inside the battery system is obtained, the first insulation detection data and the second insulation detection data are compared, and the target insulation state of the battery system is determined according to the comparison result, so that the battery system is subjected to high temperature and low temperature environments, simulating that the battery system is subjected to extreme environments, and the first sub-region of the target region where the air flowability of the battery system is greater than the preset flow threshold is coated with a thermal insulation material, and the second sub-region in the target region is not coated with a thermal insulation material, so as to create a state in which the heat dissipation of the battery system is unevenly distributed, and then according to the comparison results of the first insulation detection data and the second insulation detection data of the battery system before and after experiencing uneven heat dissipation and extreme weather, it is possible to identify in advance whether the battery system will cause condensation in a local area inside the battery system due to uneven heat dissipation and extreme weather, thereby realizing rapid detection of the insulation state of the battery system before the battery system is used, identifying the problem of condensation accumulation in the battery system in advance, and reducing safety hazards.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0027] Figure 1 It is a flow chart of a method for detecting insulation properties of a battery system provided in an embodiment of the first aspect of the present application;

[0028] Figure 2 is a top view of a battery system according to an embodiment of the first aspect of the present application;

[0029] Figure 3 It is a structural schematic diagram of an insulation detection device for a battery system provided in an embodiment of the second aspect of the present application;

[0030] Figure 4 It is a structural schematic diagram of an electronic device provided in an embodiment of the third aspect of the present application. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0033] As described in the background technology section, in the prior art, during the use of the battery system, due to factors such as extreme weather, driving conditions, and airtight failure, local condensation may occur inside the battery system, causing insulation value failure inside the box. If the failure cannot be discovered in time during subsequent use, it is easy to cause insulation failure of the battery system, which poses a great safety hazard. In order to solve the above problem, the embodiment of the present application provides an insulation detection method and device for a battery system, firstly obtaining first insulation detection data inside the battery system, then placing the battery system in a high temperature environment and letting it stand for a first preset time, then placing the battery system in a low temperature environment and letting it stand for a second preset time, then taking the battery system out and letting it stand for a third preset time, obtaining second insulation detection data inside the battery system, and comparing the first insulation detection data with the second insulation detection data. The data are compared, and the target insulation state of the battery system is determined according to the comparison result, so that the battery system is subjected to high and low temperature environments, simulating that the battery system is subjected to extreme environments, and the first sub-area of ​​the target area where the air flowability of the battery system is greater than the preset flow threshold is covered with thermal insulation material, and the second sub-area in the target area is not covered with thermal insulation material, thus creating a state of uneven heat dissipation distribution of the battery system, and then according to the comparison results of the first insulation test data and the second insulation test data of the battery system before and after experiencing uneven heat dissipation and extreme weather, it is possible to identify in advance whether the battery system will have condensation in local areas due to uneven heat dissipation and extreme weather, thereby realizing rapid detection of the insulation state of the battery system before the battery system is used, identifying the problem of condensation accumulation in the battery system in advance, and reducing safety hazards.

[0034] The insulation detection method of the battery system provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0035] Figure 1 It is a flow chart of a method for detecting the insulation of a battery system provided in an embodiment of the present application. The execution subject of the method for detecting the insulation of a battery system may be a server. It should be noted that the above execution subject does not constitute a limitation on the present application.

[0036] like Figure 1 As shown, the insulation detection method of the battery system provided in the embodiment of the present application may include steps 110 to 150.

[0037] Step 110: Acquire first insulation detection data inside the battery system.

[0038] The first insulation test data may be test data obtained after performing relevant insulation tests on the inside of the battery system, including but not limited to the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the moisture absorbent sheet in the battery system, and the humidity value inside the battery system.

[0039] In some embodiments of the present application, when obtaining the insulation resistance value of the battery system, the withstand voltage value of the battery system, the airtightness value of the battery system, the weight of the hygroscopic sheet in the battery system and the humidity value inside the battery system, the data can be obtained through corresponding sensors. For example, the withstand voltage value of the battery system can be obtained through a pressure gauge, the airtightness of the battery system can be obtained through a sensor for detecting the airtightness, and the humidity value inside the battery system can also be obtained through a humidity sensor. The weight of the hygroscopic sheet can be obtained by a pressure sensor set on the hygroscopic sheet.

[0040] It should be noted that the above-mentioned detection method is only an example of an embodiment of the present application and is not limiting. Any method that can obtain the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the moisture absorbent sheet in the battery system and the humidity value inside the battery system falls within the protection scope of the embodiments of the present application.

[0041] In an embodiment of the present application, detection is performed inside the battery system by using a sensor to obtain the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the hygroscopic sheet in the battery system and the humidity value inside the battery system. In this way, the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the hygroscopic sheet in the battery system and the humidity value inside the battery system can be quickly and directly obtained, thereby improving the detection efficiency of the first insulation detection data.

[0042] In some embodiments of the present application, the first insulation detection data may also include whether there is any debris inside the battery system, and whether there is condensed water on the internal connection wires of the battery system. Whether there is any debris inside the battery system, and whether there is condensed water on the internal wiring harness connection wires of the battery system can be detected by the following methods:

[0043] Acquire image data inside the battery system;

[0044] The image data is inspected, and based on the inspection results, it is determined whether there is any debris inside the battery system, and whether there is condensed water at the wiring harness connector inside the battery system.

[0045] The image data may be an image of the interior of the battery system acquired by an image acquisition device.

[0046] In some embodiments of the present application, by performing detection on the image data, for example, performing region segmentation detection on the image data, or performing feature detection on the image data, etc., a detection result is obtained, and based on the detection result, it can be determined whether there is debris inside the battery system and whether there is condensed water at the internal connecting wires of the battery system. For example, feature detection can be performed on the image data, and when feature points with debris are detected, it is determined that there are debris inside the battery system, and when water droplets are detected at the wiring harness connections inside the battery system, it can be determined that there is condensed water at the wiring harness connections inside the battery system.

[0047] In some embodiments of the present application, the above-mentioned debris may be metal debris, dust, etc.

[0048] In some embodiments of the present application, in order to improve the detection efficiency of the first insulation detection data, when detecting whether there is debris inside the battery system and whether there is condensed water at the wiring harness connection line inside the battery system, it can also be achieved in the following manner:

[0049] Input the image data into the trained detection model to obtain the detection results;

[0050] Based on the test results, determine whether there is any debris inside the battery system and whether there is condensed water on the wiring harness connectors inside the battery system.

[0051] In some embodiments of the present application, the detection model may be a pre-trained model for detecting image data to obtain detection results of the image data. For example, it may be a neural network model based on deep learning, a support vector machine, or a classifier, etc., which is not limited here.

[0052] In some embodiments of the present application, it is also possible to directly check through manual observation whether there is any debris inside the battery system and whether there is any condensed water on the wiring harness connecting lines inside the battery system.

[0053] In an embodiment of the present application, by acquiring image data of the interior of the battery system, the image data is detected, and based on the detection results, it is determined whether there is any debris inside the battery system and whether there is condensation at the wiring harness connecting lines inside the battery system. In this way, it is possible to accurately and objectively determine whether there is any debris inside the battery system and whether there is condensation at the wiring harness connecting lines inside the battery system.

[0054] In some embodiments of the present application, after detecting whether there is any debris inside the battery system, whether there is condensed water at the wiring harness connecting lines inside the battery system, and the insulation resistance and withstand voltage value of the battery system, that is, after inspecting the internal appearance of the battery system, the battery system can be sealed, the upper cover fixing bolts can be tightened according to the corresponding force, and then the air tightness of the battery system, the weight of the desiccant sheet and the humidity value can be tested.

[0055] It should be noted that when deploying humidity sensors in the battery system, more sensors can be arranged in the internal area of ​​the battery corresponding to the exposed position, and a small number of sensors can be evenly distributed in other positions. This is because the exposed position has relatively greater fluidity and is more prone to moisture, so more humidity sensors need to be deployed to obtain accurate humidity values ​​inside the battery system.

[0056] The above-mentioned exposed position refers to the position exposed to the external environment. Here, the area with large air flow near the rear drive battery system can be selected, for example, Figure 2 , Figure 2 It is a top view of the battery system. The rectangular area 21 is the upper cover area of ​​the battery system. The upper cover area has a partially exposed area 23. More humidity sensors can be deployed inside the battery system corresponding to the exposed area 23.

[0057] Step 120: Place the battery system in a high temperature environment and leave it to stand for a first preset time period.

[0058] Among them, the high temperature environment can be an environment where the temperature is greater than the first preset temperature threshold and the humidity is greater than the first preset humidity threshold. The first preset temperature threshold and the first preset humidity threshold here can be set according to user needs. For example, the first preset temperature threshold can be 50°C, and the first preset humidity threshold can be 95%RH. The specific first preset temperature threshold and the first preset humidity threshold can be related to the vehicle model and the size of the battery system, which is not limited here.

[0059] The first preset time period may be a preset time period for the battery system to remain stationary in a high temperature environment, for example, 24 hours. The first preset time period is related to the vehicle model and the size of the battery system and is not limited here.

[0060] In some embodiments of the present application, after step 110, when step 120 is executed, the first sub-area of ​​the target area of ​​the battery system is coated with insulation material. The target area here is an area where air fluidity is greater than a preset flow threshold, for example, it may be an area with greater air flow near the rear-drive battery system. The preset flow threshold may be an air fluidity threshold preset by the user, and the threshold may be set according to user needs and is not limited here.

[0061] The target area includes a first sub-area and a second sub-area, and the second sub-area in the target area is not covered with a thermal insulation material. Figure 2 , Figure 2 The first sub-region of the rectangular region 21 is wrapped with a heat-insulating material (such as Figure 2 The area indicated by the slash is the first sub-area), and the second sub-area 23 of the rectangular area 21 is not wrapped with thermal insulation material, thus creating a state of uneven heat dissipation distribution.

[0062] It should be noted that the thermal insulation material here may be, for example, thermal insulation foam, or other thermal insulation materials, which are not limited here.

[0063] In some embodiments of the present application, the upper cover of the battery system is wrapped with a heat-insulating material to form Figure 2 After the effect shown, the high-voltage interface and low-voltage interface in the battery system need to be connected to the connector (or harness) to ensure that each connection in the battery system is reliable and the harness has no obvious bends. Then place the battery system in a high-temperature environment and let it stand for the first preset time.

[0064] Step 130: placing the battery system after being left at rest for the first preset time in a low temperature environment for a second preset time.

[0065] The low temperature environment may be an environment where the temperature is less than a second preset temperature threshold. The second preset temperature threshold may be set according to user needs, for example, the second preset temperature threshold may be -20°C. The specific second preset temperature threshold may be related to the vehicle model and the size of the battery system, which is not limited here.

[0066] The second preset time duration may be a pre-set time duration in a low temperature environment, which may be set according to user needs. The specific second preset temperature threshold may be related to the vehicle model and the size of the battery system, which is not limited here.

[0067] It should be noted that the second preset time period is different for different adaptation schemes of the battery system in a low temperature environment. The adaptation schemes of the battery system in a low temperature environment include the following two:

[0068] Option 1:

[0069] Step 130 may specifically include:

[0070] The battery system that has been stationary for the first preset time is placed in a low-temperature environment, and when the temperature of the battery system reaches a second preset temperature threshold, the battery system is stationary in the low-temperature environment for a second preset time.

[0071] In some embodiments of the present application, the battery system after step 120 can be taken out and then placed in a low-temperature environment. When the temperature of the battery system in the low-temperature environment reaches a second preset temperature threshold, the battery system is left to stand in the low-temperature environment for a second preset time.

[0072] In an example, taking the first preset temperature threshold as 50°C, the first preset humidity threshold as 95% RH, the first preset time as 24 hours, the second preset temperature threshold as -20°C, and the second preset time as 24 hours, the battery system is first allowed to stand in a high temperature environment of 50°C and 95% RH for 24 hours and then taken out, and then placed in a low temperature environment of -20°C, and allowed to stand for 24 hours after the temperature of the battery system reaches -20°C.

[0073] In the embodiment of the present application, the battery system is placed in a low temperature environment after being left for a first preset period of time, and when the temperature of the battery system reaches a second preset temperature threshold, the battery system is left in the low temperature environment for a second preset period of time. This does not require any other operations, simplifies the process, and improves the efficiency of the battery system insulation detection. Solution 2:

[0074] Step 130 may specifically include:

[0075] placing the battery system after being stationary for a first preset time in a low temperature environment, and controlling the battery system to discharge when the temperature of the battery system reaches a second preset temperature threshold;

[0076] During the discharge process, the battery system is subjected to thermal management processing for a second preset time period.

[0077] In some embodiments of the present application, the battery system after step 120 can be taken out and then placed in a low-temperature environment. When the temperature of the battery system in the low-temperature environment reaches a second preset temperature threshold, the battery system is controlled to discharge. Specifically, the discharge of the battery system can be controlled by simulating the real-time operation of the whole vehicle. For example, control data that makes the whole vehicle travel at a constant speed at a certain speed is input into the simulation software to control the operation of the whole vehicle, thereby consuming the power consumption of the battery system, that is, to discharge the battery system. During the discharge of the battery system, the battery system can also be subjected to thermal management processing for a second preset time.

[0078] In an embodiment of the present application, by obtaining the real-time operating data of the whole vehicle in advance, the operation of the whole vehicle is simulated and the battery system is discharged. In this way, the operating condition of the battery system is closer to the actual vehicle operating state, and the insulation test result of the battery system obtained is more in line with the actual situation.

[0079] In some embodiments of the present application, during the discharge process, performing thermal management processing on the battery system for a second preset time period may specifically include:

[0080] During the discharge process, when it is detected that the temperature of the battery system is lower than a third preset temperature threshold, heating the battery system;

[0081] When the temperature of the battery system rises to a fourth preset temperature threshold, stopping heating the battery system;

[0082] When the temperature of the battery system rises to a fifth preset temperature threshold, cooling the battery system;

[0083] When the temperature of the battery system drops to a sixth preset temperature threshold, cooling the battery system is stopped.

[0084] Among them, the third preset temperature threshold, the fourth preset temperature threshold, the fifth preset temperature threshold and the sixth preset temperature threshold can be set according to user needs. For example, the third preset temperature threshold can be 18° C., the fourth preset temperature threshold can be 22° C., the fifth preset temperature threshold can be 38° C., and the sixth preset temperature threshold can be 30° C. The specific third preset temperature threshold, the fourth preset temperature threshold, the fifth preset temperature threshold and the sixth preset temperature threshold can be related to the vehicle model and the size of the battery system, which is not limited here.

[0085] In some embodiments of the present application, heating the battery system may specifically include:

[0086] The battery system is heated using cooling water having a first target temperature and a first target flow rate,

[0087] The cooling of the battery system comprises:

[0088] The battery system is cooled using cooling water at a second target temperature and a second target flow rate.

[0089] The first target temperature may be the temperature at the inlet of the cooling water for heating the battery system, and the first target flow rate may be the flow rate at the inlet of the cooling water for heating the battery system. For example, the first target temperature may be 50-55°C, and the first target flow rate may be 13ml / min. Since the cooling water at the first target temperature is used to heat the battery system, the first target temperature may be set higher, greater than the fifth preset temperature threshold, that is, to enable the temperature of the battery system to rise to the fifth preset temperature threshold.

[0090] The second target temperature may be the temperature at the inlet of the cooling water for cooling the battery system, and the second target flow rate may be the flow rate at the inlet of the cooling water for cooling the battery system. For example, the second target temperature may be 20°C, and the second target flow rate may be 13 ml / min. Since the cooling water at the second target temperature is used to cool the battery system, the second target temperature may be set lower, less than the sixth preset temperature threshold, that is, to be able to reduce the temperature of the battery system to the sixth preset temperature threshold.

[0091] In an example, taking the first preset temperature threshold as 50°C, the first preset humidity threshold as 95%RH, the first preset time as 24 hours, the second preset temperature threshold as -20°C, the second preset time as 8 hours, the third preset temperature threshold as 18°C, the fourth preset temperature threshold as 22°C, the fifth preset temperature threshold as 38°C, the sixth preset temperature threshold as 30°C, the first target temperature as 50-55°C, the first target flow rate as 13ml / min, the second target temperature as 20°C, and the second target flow rate as 13ml / min as an example, the battery system is first allowed to stand in a high temperature environment of 50°C and 95%RH for 24 hours, then taken out, and then placed in a low temperature environment of -20°C, and the battery is charged. After the temperature of the battery system reaches -20℃, the temperature of the battery system is less than 18℃ at this time, and the battery system is heated by water with an inlet temperature of 50-55℃ and a flow rate of 13ml / min. When the temperature of the battery system rises to 22℃, the heating of the battery system is stopped. Since the temperature of the water inlet is 50-55℃, which is greater than 22℃, the temperature of the battery system will continue to rise at this time. When the temperature of the battery system rises to 38℃, the water inlet temperature can be adjusted to 20℃, and the flow rate is 13ml / min to cool the battery system. When the temperature of the battery system drops to 30℃, the cooling of the battery system is stopped. The above process is repeated for 8 hours, and the battery system is taken out from the low temperature environment after 8 hours.

[0092] In an embodiment of the present application, by discharging according to the operating conditions of the entire vehicle and performing thermal management on the battery system during the discharge process, the operating conditions of the battery system are closer to the actual vehicle operating conditions, and the insulation test results of the battery system obtained are more in line with the actual situation.

[0093] It should be noted that in actual operation, any one of the above-mentioned schemes 1 and 2 can be chosen to be implemented, or both schemes can be adopted. The final effects achieved by the two schemes are almost the same.

[0094] Step 140: After the battery system has been subjected to the second preset time, take it out and leave it to stand for a third preset time, and then obtain second insulation test data inside the battery system.

[0095] Among them, the third preset time length can be a preset static time length of the battery system after being taken out of the low temperature environment, for example, it can be 2 hours. The third preset time length may be related to the vehicle model and the size of the battery system, and is not limited here.

[0096] The second insulation test data may be the insulation test data inside the battery system obtained by performing a test on the battery system again before the experiment after the battery system has been stationary for a third preset time period. Specifically, the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the moisture absorbent sheet in the battery system, the humidity value inside the battery system, whether there are sundries inside the battery system, whether there is condensed water on the connecting wires inside the battery system, etc.

[0097] It should be noted that the method of obtaining the second insulation detection data is the same as that of obtaining the first insulation detection data, which will not be repeated here.

[0098] In some embodiments of the present application, after the battery system that has experienced the second preset time is taken out and left to stand for a third preset time, the battery system is first disassembled, specifically, the insulation material wrapped in the target area is disassembled, and then the second insulation test data inside the battery system is obtained. It should be noted that in order to avoid test errors caused by the influence of ambient temperature and humidity, the disassembly process should be as short as possible, for example, it should be completed within 5 minutes.

[0099] Step 150: compare the first insulation test data with the second insulation test data, and determine the target insulation state of the battery system according to the comparison result.

[0100] The target insulation state may be a state used to characterize the insulation condition of the battery system.

[0101] In some embodiments of the present application, the insulation resistance value of the battery system in the first insulation test data can be compared with the insulation resistance value of the battery system in the second insulation test data. If it is found that the insulation resistance value of the battery system in the first insulation test data is smaller than the insulation resistance value of the battery system in the second insulation test data, it indicates that condensation water does exist in the battery system during the experiment. The weight of the hygroscopic sheet of the battery system in the first insulation test data can also be compared with the weight of the hygroscopic sheet of the battery system in the second insulation test data. If it is found that the weight of the hygroscopic sheet of the battery system in the first insulation test data is greater than the weight of the hygroscopic sheet of the battery system in the second insulation test data, it indicates that condensation water does exist in the battery system during the experiment, and the hygroscopic function of the hygroscopic sheet is useful.

[0102] In an embodiment of the present application, the target insulation state of the battery system can be determined based on a comparison result of the first insulation detection data and the second insulation detection data. Thus, the target insulation state of the battery system can be directly determined by comparing the first insulation detection data and the second insulation detection data. Thus, the insulation state of the battery system can be detected in advance before the battery system is used, and the problem of condensed water accumulation in the battery system can be identified in advance, thereby reducing safety hazards.

[0103] In some embodiments of the present application, when it is determined that the target insulation state of the battery system is poor insulation of the battery system, a prompt message is output, which can be used to guide maintenance personnel to repair the battery system to ensure the safety of the battery system and thereby ensure the safety of the vehicle.

[0104] It should be noted that the insulation detection method of the battery system provided in the embodiment of the present application can be executed by an insulation detection device of the battery system, or a control module in the insulation detection device of the battery system for executing the insulation detection method of the battery system.

[0105] Based on the same inventive concept as the above-mentioned battery system insulation detection method, the present application also provides a battery system insulation detection device. Figure 3 The insulation detection device of the battery system provided in the embodiment of the present application is described in detail.

[0106] Figure 3 It is a schematic structural diagram of an insulation detection device for a battery system according to an exemplary embodiment.

[0107] like Figure 3 As shown, the insulation detection device 300 of the battery system may include:

[0108] An acquisition module 310 is used to acquire first insulation detection data inside the battery system;

[0109] The processing module 320 is used to place the battery system in a high temperature environment and leave it to stand for a first preset time, wherein a first sub-area of ​​a target area of ​​the battery system is coated with a thermal insulation material, the target area is an area where air flowability is greater than a preset flow threshold, a second sub-area in the target area is not coated with a thermal insulation material, and the high temperature environment is an environment where the temperature is greater than a first preset temperature threshold and the humidity is greater than a first preset humidity threshold;

[0110] The processing module 320 is further configured to place the battery system after being left at rest for the first preset time in a low temperature environment for a second preset time, wherein the low temperature environment is an environment with a temperature lower than a second preset temperature threshold;

[0111] The acquisition module 310 is further used to obtain second insulation detection data inside the battery system after taking out the battery system after the second preset time and leaving it to stand for a third preset time;

[0112] The determination module 330 is used to compare the first insulation detection data with the second insulation detection data, and determine the target insulation state of the battery system according to the comparison result.

[0113] In an embodiment of the present application, by obtaining first insulation detection data inside the battery system, then placing the battery system in a high temperature environment and letting it stand for a first preset time, then placing the battery system in a low temperature environment and letting it stand for a second preset time, and then taking the battery system out and letting it stand for a third preset time, second insulation detection data inside the battery system is obtained, the first insulation detection data and the second insulation detection data are compared, and the target insulation state of the battery system is determined according to the comparison result, so that the battery system is subjected to high temperature and low temperature environments, simulating that the battery system is subjected to extreme environments, and the first sub-region of the target region where the air flowability of the battery system is greater than the preset flow threshold is coated with a thermal insulation material, and the second sub-region in the target region is not coated with a thermal insulation material, so as to create a state in which the heat dissipation of the battery system is unevenly distributed, and then according to the comparison results of the first insulation detection data and the second insulation detection data of the battery system before and after experiencing uneven heat dissipation and extreme weather, it is possible to identify in advance whether the battery system will cause condensation in a local area inside the battery system due to uneven heat dissipation and extreme weather, thereby realizing rapid detection of the insulation state of the battery system before the battery system is used, identifying the problem of condensation accumulation in the battery system in advance, and reducing safety hazards.

[0114] In some embodiments of the present application, the first insulation detection data includes at least: the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the moisture absorbent sheet in the battery system, and the humidity value inside the battery system;

[0115] The acquisition module 310 may be specifically used for:

[0116] The interior of the battery system is inspected to obtain the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the moisture absorbent sheet in the battery system, and the humidity value inside the battery system.

[0117] In some embodiments of the present application, the first insulation detection data further includes: whether there is any debris inside the battery system, and whether there is condensed water at the wiring harness connection line inside the battery system;

[0118] The acquisition module 310 may be specifically used for:

[0119] Acquiring image data inside the battery system;

[0120] The image data is detected, and whether there is any foreign matter inside the battery system and whether there is condensed water at the wiring harness connecting wire inside the battery system are determined according to the detection result.

[0121] In some embodiments of the present application, the processing module 320 may specifically include:

[0122] The first processing unit is used to place the battery system after being stationary for the first preset time in a low-temperature environment, and when the temperature of the battery system reaches the second preset temperature threshold, the battery system is stationary for a second preset time in the low-temperature environment.

[0123] In some embodiments of the present application, the processing module 320 may further include:

[0124] a second processing unit, configured to place the battery system after being stationary for the first preset time in a low temperature environment, and control the battery system to discharge when the temperature of the battery system reaches the second preset temperature threshold;

[0125] The third processing unit is used to perform thermal management processing on the battery system for a second preset time period during the discharge process.

[0126] In some embodiments of the present application, the third processing unit is specifically used to:

[0127] During the discharge process, when it is detected that the temperature of the battery system is lower than a third preset temperature threshold, heating the battery system;

[0128] When the temperature of the battery system rises to a fourth preset temperature threshold, stopping heating the battery system;

[0129] When the temperature of the battery system rises to a fifth preset temperature threshold, cooling the battery system;

[0130] When the temperature of the battery system drops to a sixth preset temperature threshold, cooling the battery system is stopped.

[0131] In some embodiments of the present application, the third processing unit is specifically used to:

[0132] heating the battery system using cooling water at a first target temperature and a first target flow rate, wherein the first target temperature is greater than the fifth preset temperature threshold;

[0133] The battery system is cooled using cooling water with a second target temperature and a second target flow rate, wherein the second target temperature is less than the sixth preset temperature threshold.

[0134] The insulation detection device for a battery system provided in an embodiment of the present application can be used to execute the insulation detection method for a battery system provided in the above-mentioned method embodiments. The implementation principle and technical effect thereof are similar and will not be described in detail here for the sake of brief introduction.

[0135] Based on the same inventive concept, an embodiment of the present application also provides an electronic device.

[0136] Figure 4 Schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 4 As shown, the electronic device may include a processor 401 and a memory 402 storing computer programs or instructions.

[0137] Specifically, the processor 401 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiment of the present invention.

[0138] The memory 402 may include a large capacity memory for data or instructions. For example, but not limitation, the memory 402 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 402 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 402 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 402 is a non-volatile solid-state memory. The memory may include a read-only memory (ROM), a random access memory (RAM), a disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Therefore, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described in the battery system insulation detection method provided in the above-mentioned embodiments.

[0139] The processor 401 reads and executes the computer program instructions stored in the memory 402 to implement any one of the battery system insulation detection methods in the above embodiments.

[0140] In one example, the electronic device may further include a communication interface 403 and a bus 410. Figure 4 As shown, the processor 401, the memory 402, and the communication interface 403 are connected via a bus 410 and communicate with each other.

[0141] The communication interface 403 is mainly used to implement the communication between the modules, devices, units and / or devices in the embodiment of the present invention.

[0142] Bus 410 includes hardware, software or both, and the parts of electronic equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 410 may include one or more buses. Although the embodiment of the present invention describes and shows a specific bus, the present invention considers any suitable bus or interconnection.

[0143] The electronic device can execute the insulation detection method of the battery system in the embodiment of the present invention, thereby achieving Figure 1 A method for detecting insulation properties of a battery system is described.

[0144] In addition, in combination with the insulation detection method of the battery system in the above embodiment, the embodiment of the present invention can provide a readable storage medium for implementation. The readable storage medium stores program instructions; when the program instructions are executed by the processor, any one of the insulation detection methods of the battery system in the above embodiment is implemented.

[0145] In addition, in combination with the battery system insulation detection method in the above embodiment, the present invention can provide a vehicle to implement the method. The vehicle includes the battery system insulation detection device, battery system insulation detection equipment and computer readable storage medium in the above embodiment.

[0146] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present invention.

[0147] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0148] It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

[0149] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0150] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0151] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system, module and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

Claims

1. A method for detecting insulation of a battery system, characterized in that: The method comprises: Acquiring first insulation detection data inside the battery system; The battery system is placed in a high temperature environment and left to stand for a first preset time, wherein a first sub-area of ​​a target area of ​​the battery system is coated with a thermal insulation material, the target area is an area where air flowability is greater than a preset flow threshold, a second sub-area in the target area is not coated with a thermal insulation material, and the high temperature environment is an environment where the temperature is greater than a first preset temperature threshold and the humidity is greater than a first preset humidity threshold; placing the battery system after being stationary for the first preset time in a low temperature environment for a second preset time, wherein the low temperature environment is an environment with a temperature lower than a second preset temperature threshold; After the battery system has been subjected to the second preset time, it is taken out and left to stand for a third preset time, and then second insulation detection data inside the battery system is obtained; The first insulation detection data and the second insulation detection data are compared, and a target insulation state of the battery system is determined according to the comparison result.

2. The method according to claim 1, characterized in that The first insulation detection data at least includes: the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the moisture absorbent sheet in the battery system, and the humidity value inside the battery system; The obtaining of first insulation detection data inside the battery system includes: The interior of the battery system is inspected to obtain the insulation resistance value of the battery system, the withstand voltage value of the battery system, the air tightness value of the battery system, the weight of the moisture absorbent sheet in the battery system, and the humidity value inside the battery system.

3. The method according to claim 1, characterized in that The first insulation detection data also includes: whether there is any debris inside the battery system, and whether there is condensed water at the wiring harness connection line inside the battery system; The obtaining of first insulation detection data inside the battery system includes: Acquiring image data inside the battery system; The image data is detected, and whether there is any foreign matter inside the battery system and whether there is condensed water at the wiring harness connecting wire inside the battery system are determined according to the detection result.

4. The method according to claim 1, characterized in that: Placing the battery system after the first preset time period in a low temperature environment for a second preset time period comprises: The battery system after being left standing for the first preset time is placed in a low temperature environment, and when the temperature of the battery system reaches the second preset temperature threshold, the battery system is left standing for a second preset time in the low temperature environment.

5. The method according to claim 1, characterized in that Placing the battery system after the first preset time period in a low temperature environment for a second preset time period comprises: placing the battery system after being stationary for the first preset time in a low temperature environment, and when the temperature of the battery system reaches the second preset temperature threshold, controlling the battery system to discharge; During the discharge process, the battery system is subjected to a thermal management process for a second preset time period.

6. The method according to claim 5, characterized in that During the discharge process, the battery system is subjected to thermal management processing for a second preset time period, including: During the discharge process, when it is detected that the temperature of the battery system is lower than a third preset temperature threshold, heating the battery system; When the temperature of the battery system rises to a fourth preset temperature threshold, stopping heating the battery system; When the temperature of the battery system rises to a fifth preset temperature threshold, cooling the battery system; When the temperature of the battery system drops to a sixth preset temperature threshold, cooling the battery system is stopped.

7. The method according to claim 6, characterized in that The step of heating the battery system comprises: heating the battery system using cooling water at a first target temperature and a first target flow rate, wherein the first target temperature is greater than the fifth preset temperature threshold; The cooling of the battery system comprises: The battery system is cooled using cooling water with a second target temperature and a second target flow rate, wherein the second target temperature is less than the sixth preset temperature threshold.

8. A battery system insulation detection device, characterized in that: The device comprises: An acquisition module, used for acquiring first insulation detection data inside the battery system; a processing module, configured to place the battery system in a high temperature environment and leave it to stand for a first preset time, wherein a target area of ​​the battery system is coated with a heat preservation material, the target area is an area where air fluidity is greater than a preset flow threshold, a first sub-area in the target area is not coated with a heat preservation material, and the high temperature environment is an environment where the temperature is greater than a first preset temperature threshold and the humidity is greater than a first preset humidity threshold; The processing module is further used to place the battery system after being stationary for the first preset time in a low temperature environment for a second preset time, wherein the low temperature environment is an environment with a temperature less than a second preset temperature threshold; The acquisition module is further used to obtain second insulation detection data inside the battery system after taking out the battery system after the second preset time and leaving it to stand for a third preset time; A determination module is used to compare the first insulation detection data with the second insulation detection data, and determine a target insulation state of the battery system according to the comparison result.

9. An insulation testing device for a battery system, characterized in that: The insulation detection of the battery system includes: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the insulation detection method of the battery system according to any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the method for detecting insulation of a battery system according to any one of claims 1 to 6 is implemented.

11. A vehicle, characterized in that: The vehicle comprises at least one of the following: The insulation detection device of the battery system as claimed in claim 8; The insulation testing device for a battery system as claimed in claim 9.

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