Contactor contact adhesion detection method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a contactor contact adhesion detection method and device, electronic equipment and a storage medium. The method comprises the steps that a contactor is controlled to be conducted, and the first temperature of a heater is obtained; controlling the contactor to be disconnected to obtain the current second temperature of the heater; after the contactor is disconnected, a fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained; after the fan runs for the first preset time, the heater is controlled to stand for the second preset time, and the fourth temperature of the heater after standing is obtained; and determining whether the contactor contact is adhered according to the difference degree of the second temperature, the third temperature and the fourth temperature. According to the technical scheme provided by the embodiment of the invention, an auxiliary detection contact does not need to be additionally arranged, whether the contact of the high-voltage direct-current contactor is adhered or not can be judged only by comparing the temperatures of the high-voltage PTC heater in different states, and the detection method is simple, accurate and relatively low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of contactor fault detection, and in particular to a contactor contact adhesion detection method, device, electronic equipment and storage medium. Background Art

[0002] With the continuous promotion and use of new energy vehicles, high-voltage positive temperature coefficient (PTC) electric defrosting products have become an indispensable configuration for new energy buses, buses and other vehicles. As an important control unit of high-voltage PTC electric defrosting, high-voltage DC contactors will be out of control once the contact adhesion failure occurs, affecting driving safety.

[0003] At present, the detection method for high-voltage DC contactor contact adhesion is usually to add auxiliary contacts, which not only increases the cost of contactor contact detection, but also requires wiring harness connection for the entire vehicle. The detection method is complex, the accuracy is low, and the detection process is cumbersome.

[0004] The existing contactor contact adhesion detection methods are high in cost and cumbersome in method, which has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0005] The present invention provides a contactor contact adhesion detection method, device, electronic device and storage medium to solve the problems of high cost and complicated method of existing contactor contact adhesion detection method, thereby simplifying the contactor contact adhesion detection method and reducing detection cost.

[0006] According to one aspect of the present invention, a contactor contact adhesion detection method is provided, wherein the contactor is used to control the power on and power off of a heater, and the detection method comprises:

[0007] Controlling the contactor to be turned on to obtain a first temperature of the heater;

[0008] Controlling the contactor to disconnect, and obtaining the current second temperature of the heater;

[0009] After the contactor is disconnected, the fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained;

[0010] After the fan runs for a first preset time, controlling the heater to stand for a second preset time, and obtaining a fourth temperature of the heater after the heater stands still;

[0011] Whether the contactor contacts are stuck is determined according to the degree of difference among the second temperature, the third temperature, and the fourth temperature.

[0012] Optionally, determining whether the contact of the contactor is stuck according to the difference between the second temperature, the third temperature and the fourth temperature includes:

[0013] If the third temperature is higher than the second temperature, or the difference between the third temperature and the second temperature is lower than a first threshold, it is determined whether the contactor contact is stuck according to the third temperature and the fourth temperature.

[0014] Optionally, determining whether the contact of the contactor is stuck according to the difference between the second temperature, the third temperature and the fourth temperature further includes:

[0015] If the third temperature is lower than the second temperature, and a difference between the third temperature and the second temperature is higher than or equal to a first threshold, it is determined that the contactor contacts are not stuck.

[0016] Optionally, determining whether the contact of the contactor is stuck according to the third temperature and the fourth temperature includes:

[0017] If the fourth temperature is lower than the third temperature, and the difference between the fourth temperature and the third temperature is higher than or equal to a second threshold, determining that the contactor contact is not stuck;

[0018] If the fourth temperature is higher than the third temperature, or the difference between the fourth temperature and the third temperature is lower than a second threshold, it is determined that the contactor contact is stuck.

[0019] Optionally, before controlling the contactor to disconnect and obtaining the current second temperature of the heater, the method further includes:

[0020] Obtaining the starting temperature, ambient temperature and heating time of the heater;

[0021] determining a theoretical temperature of the heater according to the starting temperature, the ambient temperature and the heating time;

[0022] It is determined whether the temperature sensor is abnormal according to the first temperature and the theoretical temperature.

[0023] Optionally, determining whether the temperature sensor is abnormal according to the first temperature and the theoretical temperature includes:

[0024] If the difference between the first temperature and the theoretical temperature is not within a preset range, determining that the temperature sensor is abnormal;

[0025] If the difference between the first temperature and the theoretical temperature is within a preset range, it is determined that the temperature sensor is normal.

[0026] Optionally, after determining whether the contact of the contactor is stuck according to the difference between the second temperature, the third temperature and the fourth temperature, the method further includes:

[0027] If the contactor contacts are stuck, a fault alarm is issued and the fan is turned on to cool the heater.

[0028] According to another aspect of the present invention, a contactor contact adhesion detection device is provided, comprising a heater, a fan, a temperature sensor and a control module, wherein the contactor is used to control the power on and off of the heater, and the fan is used to cool the heater.

[0029] The control module is used to control the contactor to be turned on, and obtain the first temperature information of the contactor through the temperature sensor;

[0030] Controlling the contactor to disconnect, and obtaining the current second temperature of the heater through the temperature sensor;

[0031] After the contactor is disconnected, the fan is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained through the temperature sensor;

[0032] After the fan runs for a first preset time, controlling the heater to stand for a second preset time, and obtaining a fourth temperature of the heater after the heater stands for a second preset time through the temperature sensor;

[0033] Whether the contactor is stuck is determined according to the degree of difference among the second temperature, the third temperature, and the fourth temperature.

[0034] According to another aspect of the present invention, there is provided an electronic device, comprising:

[0035] one or more processors;

[0036] a storage device for storing one or more programs,

[0037] When the one or more programs are executed by the one or more processors, the one or more processors implement any of the contactor contact adhesion detection methods described above in the present invention.

[0038] According to another aspect of the present invention, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, any of the contactor contact adhesion detection methods described above in the present invention is implemented.

[0039] The technical solution of the embodiment of the present invention first obtains the second temperature when the high-voltage PTC heater stops heating, the third temperature when the fan finishes blowing the high-voltage PTC heater, and the fourth temperature when the high-voltage PTC heater ends standing. Then, the degree of difference between the second temperature, the third temperature, and the fourth temperature is used to determine whether the contacts of the high-voltage DC contactor are sticking. The detection method of the embodiment of the present invention does not require additional auxiliary detection contacts. It only needs to compare the temperature of the high-voltage PTC heater under different states to determine whether the contacts of the high-voltage DC contactor are sticking. The detection method is simple, accurate, and low-cost, thereby effectively protecting the high-voltage DC contactor and the high-voltage PTC heater and reducing losses.

[0040] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A flow chart of a contactor contact adhesion detection method provided by an embodiment of the present invention;

[0043] Figure 2 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention;

[0044] Figure 3 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention;

[0045] Figure 4 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention;

[0046] Figure 5 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention;

[0047] Figure 6 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention;

[0048] Figure 7 A schematic structural diagram of a contactor contact adhesion detection device provided by an embodiment of the present invention;

[0049] Figure 8 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0052] Figure 1 A flow chart of a contactor contact adhesion detection method provided in an embodiment of the present invention is applicable to high-voltage contactor contact adhesion situations. The method can be executed by a contactor contact adhesion detection device, which can be implemented in the form of hardware and / or software.

[0053] like Figure 1 As shown, the detection method provided by the embodiment of the present invention includes:

[0054] S110 , controlling the contactor to be turned on to obtain a first temperature of the heater.

[0055] Specifically, in some electric defrosting and electric heating products, high-voltage DC contactors are used. High-voltage DC contactors are mainly used to control the power on and off of high-voltage PTC heaters. After the high-voltage DC contactor is turned on, when current flows through the PTC heating element, the high-voltage PTC heater will generate a certain amount of heat. At this time, it is necessary to obtain the first temperature of the high-voltage PTC heater. Among them, the first temperature refers to the temperature of the high-voltage PTC heater when it is working after the high-voltage contactor is turned on.

[0056] S120, controlling the contactor to disconnect, and obtaining the current second temperature of the heater.

[0057] Specifically, in electric heating and electric defrosting products, the heating state is usually not always maintained. After the high-voltage PTC heater has heated for a period of time, the heating will stop. By controlling the high-voltage DC contactor to disconnect, the high-voltage PTC heater is powered off, and the second temperature of the high-voltage PTC heater at this time is obtained. The second temperature is the temperature of the high-voltage PTC heater when the high-voltage DC contactor is disconnected, that is, the stop heating temperature of the high-voltage PTC heater.

[0058] S130: After the contactor is disconnected, the fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained.

[0059] Specifically, after the high-voltage DC contactor is disconnected, the high-voltage PTC heater is powered off and stops heating, and the fan starts working, and the fan is controlled to work for the first preset time. The main function of the fan is to purge and cool the high-voltage PTC heater. The fan stops working after running for the first preset time, and the third temperature of the high-voltage PTC heater at this time is obtained. Among them, the first preset time can be set according to actual conditions, and the embodiment of the present application is not specifically limited here. The third temperature is the temperature of the high-voltage PTC heater when the fan stops working, that is, the purging completion temperature of the high-voltage PTC heater. Exemplarily, the first preset time can be 50 seconds.

[0060] S140: After the fan runs for a first preset time, control the heater to stand for a second preset time, and obtain a fourth temperature of the heater after the heater stands still.

[0061] Specifically, after the fan purges and cools down the high-voltage PTC heater, the high-voltage PTC heater is controlled to stand still for a second preset time. Controlling the high-voltage PTC heater to stand still means that neither the high-voltage PTC heater nor the fan is running, and the high-voltage PTC heater is cooled down naturally. After the high-voltage PTC heater ends standing still, the fourth temperature of the high-voltage PTC heater is obtained. Among them, the second preset time can be set according to actual conditions, and the embodiment of the present application is not specifically limited here. The third temperature is the temperature at the end of the high-voltage PTC heater standing still, that is, the end temperature of the high-voltage PTC heater standing still. Exemplarily, the second preset time can be 20 seconds.

[0062] S150: Determine whether the contactor contacts are stuck according to the difference between the second temperature, the third temperature, and the fourth temperature.

[0063] Specifically, after obtaining the second temperature, the third temperature and the fourth temperature of the high-voltage DC contactor, it is determined whether the contacts of the high-voltage PTC heater are sticking by the difference between the second temperature, the third temperature and the fourth temperature. The temperature difference of the high-voltage PTC heater under different states can reflect the state of the contacts of the high-voltage DC contactor. Therefore, it is possible to judge whether the contacts of the high-voltage DC contactor are sticking based on the obtained second temperature, the third temperature and the fourth temperature. The implementation of the present invention can accurately judge whether the contacts of the high-voltage DC contactor are sticking by the temperature of the high-voltage PTC heater. The detection method is simple and effectively reduces the cost.

[0064] The contactor contact adhesion detection method provided in the embodiment of the present invention first obtains the second temperature when the high-voltage PTC heater stops heating, the third temperature when the fan finishes blowing the high-voltage PTC heater, and the fourth temperature when the high-voltage PTC heater ends standing. Then, the degree of difference between the second temperature, the third temperature, and the fourth temperature is used to determine whether the contacts of the high-voltage DC contactor are adhered. The detection method of the embodiment of the present invention does not require additional auxiliary detection contacts. It only needs to compare the temperature of the high-voltage PTC heater under different states to determine whether the contacts of the high-voltage DC contactor are adhered. The detection method is simple, accurate, and low-cost, thereby effectively protecting the high-voltage DC contactor and the high-voltage PTC heater and reducing losses.

[0065] Optional, Figure 2 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention. Figure 2 , the detection method provided by the embodiment of the present invention includes:

[0066] S210 , controlling the contactor to be turned on, and obtaining a first temperature of the heater.

[0067] S220, controlling the contactor to disconnect, and obtaining the current second temperature of the heater.

[0068] S230: After the contactor is disconnected, the fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained.

[0069] S240: After the fan runs for a first preset time, control the heater to stand for a second preset time, and obtain a fourth temperature of the heater after the heater stands still.

[0070] S250: If the third temperature is higher than the second temperature, or the difference between the third temperature and the second temperature is lower than the first threshold, determine whether the contactor contacts are stuck according to the third temperature and the fourth temperature.

[0071] Specifically, after obtaining the second temperature, the third temperature and the fourth temperature of the high-voltage PTC heater, the difference between the second temperature, the third temperature and the fourth temperature is used to determine whether the contacts of the high-voltage DC contactor are sticking. If the third temperature is higher than the second temperature, or the difference between the third temperature and the second temperature is lower than the first threshold, it is still not possible to determine whether the contacts of the high-voltage DC contactor are sticking, and it is also necessary to determine whether the contacts of the high-voltage DC contactor are sticking based on the third temperature and the fourth temperature. If the purge completion temperature of the high-voltage PTC heater is higher than the stop heating temperature of the high-voltage PTC heater when the fan stops working, or the temperature difference between the two is lower than the first threshold, it is also necessary to determine whether the high-voltage DC contactor is sticking based on the stop heating temperature and the end standing temperature of the high-voltage PTC heater when it stops standing. Among them, the first threshold can be set according to the actual situation, and the embodiment of the present application is not specifically limited here.

[0072] Optional, Figure 3 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention. Figure 3 , the detection method provided by the embodiment of the present invention includes:

[0073] S310, controlling the contactor to be turned on to obtain a first temperature of the heater.

[0074] S320, control the contactor to disconnect and obtain the current second temperature of the heater.

[0075] S330: After the contactor is disconnected, the fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained.

[0076] S340: After the fan runs for a first preset time, control the heater to stand for a second preset time, and obtain a fourth temperature of the heater after the heater stands still.

[0077] S350: If the third temperature is lower than the second temperature, and the difference between the third temperature and the second temperature is higher than or equal to the first threshold, determine that the contactor contacts are not stuck.

[0078] Specifically, after obtaining the second temperature, the third temperature and the fourth temperature of the high-voltage PTC heater, the difference between the second temperature, the third temperature and the fourth temperature is used to determine whether the contacts of the high-voltage DC contactor are adhered. If the third temperature is lower than the second temperature, and the difference between the third temperature and the second temperature is higher than or equal to the first threshold, it is determined that the contacts on the high-voltage DC contactor side are not adhered. The third temperature is lower than the second temperature, and the difference between the third temperature and the second temperature is higher than or equal to the first threshold, indicating that the third temperature of the high-voltage PTC heater is much lower than the second temperature under the purging and cooling of the fan, that is, the purging completion temperature of the high-voltage PTC heater is much lower than the stop heating temperature. The high-voltage PTC heater has completed the cooling under the purging of the fan, and the reduced temperature meets the requirements. It indicates that the contacts of the high-voltage DC contactor are not adhered, and when the high-voltage DC contactor is controlled to be disconnected, the contacts of the high-voltage DC contactor are directly disconnected, and the high-voltage PTC heater stops heating.

[0079] Optional, Figure 4 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention. Figure 4 , the detection method provided by the embodiment of the present invention includes:

[0080] S410, controlling the contactor to be turned on to obtain a first temperature of the heater.

[0081] S420, control the contactor to disconnect, and obtain the current second temperature of the heater.

[0082] S430: After the contactor is disconnected, the fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained.

[0083] S440: After the fan runs for a first preset time, control the heater to stand for a second preset time, and obtain a fourth temperature of the heater after the heater stands still.

[0084] S450: If the third temperature is higher than the second temperature, or the difference between the third temperature and the second temperature is lower than the first threshold, determine whether the contactor contacts are stuck according to the third temperature and the fourth temperature.

[0085] S460: If the fourth temperature is lower than the third temperature, and the difference between the fourth temperature and the third temperature is higher than or equal to the second threshold, determine that the contactor contacts are not stuck.

[0086] Specifically, when the third temperature of the high-voltage PTC heater is higher than the second temperature, or the difference between the third temperature and the second temperature is lower than the first threshold, it is still not possible to determine whether the contacts of the high-voltage DC contactor are adhered, and it is necessary to further determine whether the contacts of the high-voltage DC contactor are adhered by the relationship between the third temperature and the fourth temperature. If the fourth temperature is lower than the third temperature, and the difference between the fourth temperature and the third temperature is higher than or equal to the second threshold, it is determined that the contacts of the high-voltage DC contactor are not adhered. The fourth temperature is the end-of-stationary temperature after the high-voltage PTC heater is left to stand for the second preset time. If the end-of-stationary temperature is lower than the purge completion temperature, and the difference between the two temperatures is higher than or equal to the second threshold. It indicates that the temperature of the high-voltage PTC heater has dropped to a reasonable temperature during the standing process, the contacts of the high-voltage DC contactor have been in a disconnected state, and the high-voltage PTC heater has not been heated. It can be determined that when the high-voltage DC contactor is controlled to be disconnected, the contacts are directly disconnected and not adhered together. Among them, the second threshold can be set according to actual conditions, and the embodiment of the present application is not specifically limited here.

[0087] S470: If the fourth temperature is higher than the third temperature, or the difference between the fourth temperature and the third temperature is lower than the second threshold, determine that the contactor contacts are stuck.

[0088] Specifically, when the third temperature of the high-voltage PTC heater is higher than the second temperature, or the difference between the third temperature and the second temperature is lower than the first threshold, it is necessary to further determine whether the contacts of the high-voltage DC contactor are adhered by the relationship between the third temperature and the fourth temperature. If the fourth temperature is higher than the third temperature, or the difference between the fourth temperature and the third temperature is lower than the second threshold, it is determined that the contacts of the high-voltage DC contactor are adhered together. The fourth temperature is also the end-of-stationary temperature of the high-voltage PTC heater. The end-of-stationary temperature is higher than the purge completion temperature, or the difference between the end-of-stationary temperature and the purge completion temperature is lower than the second threshold. The temperature of the high-voltage PTC heater does not decrease but increases during the standing process, or the temperature decreases in the standing process is not obvious and does not meet the requirements. It can be concluded that the high-voltage PTC heater is still heating during the standing process, and the high-voltage DC contactor is not completely disconnected due to contact adhesion when it is disconnected, resulting in the high-voltage PTC heater being in a heating state all the time. The embodiment of the present invention obtains temperature information of the high-voltage PTC heater under different states, and determines whether the contacts of the high-voltage DC contactor are stuck based on the temperature information. The judgment method is simple, does not require complicated detection steps, and can accurately judge whether the contacts of the high-voltage DC contactor are stuck without adding auxiliary contacts.

[0089] Optional, Figure 5 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention. Figure 5, the detection method provided by the embodiment of the present invention includes:

[0090] S510, controlling the contactor to be turned on to obtain a first temperature of the heater.

[0091] S520: Obtain the starting temperature, ambient temperature and heating time of the heater.

[0092] Specifically, when heating the high-voltage PTC heater, it is also necessary to obtain the starting temperature of the high-voltage PTC heater and the ambient temperature at that time. It is also necessary to obtain the heating time of the high-voltage PTC heater after the high-voltage DC contactor is powered on. Among them, the starting temperature is the temperature before the high-voltage PTC heater starts heating, the ambient temperature is the temperature of the environment where the high-voltage PTC heater is located at that time, and the heating time refers to the heating time of the high-voltage PTC heater.

[0093] S530: Determine the theoretical temperature of the heater according to the starting temperature, the ambient temperature and the heating time.

[0094] Specifically, after obtaining the starting temperature, ambient temperature and heating time of the high-voltage PTC heater, the theoretical temperature of the high-voltage PTC heater can be determined according to the starting temperature, ambient temperature and heating time. The theoretical temperature refers to the temperature that the high-voltage PTC heater should reach under certain conditions. The temperature that the high-voltage PTC heater should reach is determined by obtaining the starting temperature, ambient temperature and heating time, that is, the theoretical temperature of the high-voltage PTC heater.

[0095] S540: Determine whether the temperature sensor is abnormal according to the first temperature and the theoretical temperature.

[0096] Specifically, after the theoretical temperature of the high-voltage PTC heater is determined according to the starting temperature, the ambient temperature and the heating time, whether the temperature sensor is abnormal is determined according to the difference between the theoretical temperature and the first temperature. The first temperature is the temperature of the high-voltage PTC heater measured by the temperature sensor at this time. If the difference between the first temperature and the actual temperature is large, it means that the temperature measured by the temperature sensor is inaccurate, and it can be determined that the temperature sensor is abnormal.

[0097] S550: If the difference between the first temperature and the theoretical temperature is not within a preset range, it is determined that the temperature sensor is abnormal.

[0098] Specifically, if the difference between the first temperature and the theoretical temperature is not within the preset range, it means that the temperature measured by the temperature sensor is inaccurate, and it can be determined that the temperature sensor is abnormal at this time. Among them, the preset range can be set according to the actual situation, and the embodiment of the present application is not specifically limited here. The first temperature and the theoretical temperature are not within the preset range, which means that the difference between the first temperature displayed by the temperature sensor and the theoretical temperature is too large, indicating that the temperature measured by the temperature sensor is inaccurate, and it can be determined that the temperature sensor is abnormal at this time. At this time, the high-voltage DC contactor is disconnected after the fan is controlled to run for a certain period of time. The certain time can be set according to the actual situation, and illustratively, it can be 50 seconds.

[0099] S560: If the difference between the first temperature and the theoretical temperature is within a preset range, it is determined that the temperature sensor is normal.

[0100] Specifically, if the difference between the first temperature and the theoretical temperature is within a preset range, it means that the temperature measured by the temperature sensor is not much different from the theoretical temperature of the high-voltage PTC heater, and the temperature sensor is in a normal state. At this time, it is possible to detect whether the high-voltage DC contactor contacts are sticking. The embodiment of the present invention first detects whether the temperature sensor is abnormal before detecting whether the high-voltage DC contactor contacts are sticking, thereby eliminating other factors that affect the detection results and making the detection results more accurate.

[0101] Optional, Figure 6 A flow chart of another contactor contact adhesion detection method provided by an embodiment of the present invention. Figure 6 , the detection method provided by the embodiment of the present invention includes:

[0102] S610 , controlling the contactor to be turned on to obtain a first temperature of the heater.

[0103] S620, control the contactor to disconnect, and obtain the current second temperature of the heater.

[0104] S630: After the contactor is disconnected, the fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained.

[0105] S640: After the fan runs for a first preset time, control the heater to stand for a second preset time, and obtain a fourth temperature of the heater after the heater stands still.

[0106] S650: Determine whether the contactor contacts are stuck according to the difference between the second temperature, the third temperature, and the fourth temperature.

[0107] S660: If the contactor contacts are stuck, a fault alarm will be issued and the fan will be turned on to cool the heater.

[0108] Specifically, after the contact of the high-voltage DC contactor is detected to be stuck, a fault alarm is immediately issued to notify the relevant department to handle it, and the fan is turned on to cool down the high-voltage PTC heater. After the contact of the high-voltage DC contactor is detected to be stuck, it is equivalent to the contact of the high-voltage DC contactor being unable to disconnect, and the high-voltage PTC heater is always in a heating state, and the temperature will continue to rise. An alarm is issued in time and the fan is turned on to cool down the high-voltage PTC heater to avoid damage to other components and reduce losses.

[0109] The contactor contact adhesion detection method provided in the embodiment of the present invention obtains the temperature of the high-voltage PTC heater in different states, and determines whether the contacts of the high-voltage DC contactor are adhered according to the temperature in different states. There is no need to add auxiliary contacts, which reduces the difficulty of detection, improves the accuracy of detection, and effectively reduces costs.

[0110] An embodiment of the present invention further provides a contactor contact adhesion detection device. Figure 7 The following is a schematic diagram of a contactor contact adhesion detection device provided by an embodiment of the present invention. Figure 7 As shown, the detection device 100 includes a control module 110, a heater 120, a fan 130 and a temperature sensor 140. The contactor is used to control the power on and off of the heater 120, and the fan 130 is used to purge and cool the heater 120. The control module 110 is used to control the contactor to be turned on, and obtain the first temperature information of the contactor through the temperature sensor 140; control the contactor to be turned off, and obtain the current second temperature of the heater 120 through the temperature sensor 140; after the contactor is turned off, control the fan 130 to run for a first preset time, and obtain the third temperature of the heater 120 when the fan 130 stops running through the temperature sensor 140; after the fan 130 runs for the first preset time, control the heater 120 to stand for a second preset time, and obtain the fourth temperature of the heater 120 after standing through the temperature sensor 140; determine whether the contactor is sticky according to the difference between the second temperature, the third temperature and the fourth temperature.

[0111] The embodiment of the present invention controls the temperature sensor through the control module to obtain the temperature information of the heater under different states, and judges whether the contacts of the high-voltage DC contactor are sticky according to the different temperature information. There is no need to add auxiliary contacts. The detection device has a simple structure and accurate detection results. It avoids the loss of the high-voltage PTC heater due to the adhesion of the high-voltage DC contactor contacts and effectively reduces the detection cost.

[0112] The contactor contact adhesion detection device provided in the embodiment of the present invention can execute the contactor contact adhesion detection method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0113] Figure 8 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0114] like Figure 8 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0115] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0116] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a contactor contact adhesion detection method.

[0117] In some embodiments, the contactor contact sticking detection method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the contactor contact sticking detection method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the contactor contact sticking detection method in any other appropriate manner (e.g., by means of firmware).

[0118] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0119] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0120] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0121] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0122] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0123] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0124] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0125] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A contactor contact adhesion detection method, characterized in that: The contactor is used to control the power on and off of the heater, and the detection method includes: Controlling the contactor to be turned on to obtain a first temperature of the heater; Controlling the contactor to disconnect, and obtaining the current second temperature of the heater; After the contactor is disconnected, the fan for cooling the heater is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained; After the fan runs for a first preset time, controlling the heater to stand for a second preset time, and obtaining a fourth temperature of the heater after the heater stands still; Whether the contactor contacts are stuck is determined according to the degree of difference among the second temperature, the third temperature, and the fourth temperature.

2. The contactor contact adhesion detection method according to claim 1, characterized in that: Determining whether the contact of the contactor is stuck according to the difference between the second temperature, the third temperature and the fourth temperature includes: If the third temperature is higher than the second temperature, or the difference between the third temperature and the second temperature is lower than a first threshold, it is determined whether the contactor contact is stuck according to the third temperature and the fourth temperature.

3. The contactor contact adhesion detection method according to claim 1, characterized in that: Determining whether the contact of the contactor is stuck according to the difference between the second temperature, the third temperature and the fourth temperature, further comprising: If the third temperature is lower than the second temperature, and a difference between the third temperature and the second temperature is higher than or equal to a first threshold, it is determined that the contactor contacts are not stuck.

4. The contactor contact adhesion detection method according to claim 2, characterized in that: Determining whether the contact of the contactor is stuck according to the third temperature and the fourth temperature includes: If the fourth temperature is lower than the third temperature, and the difference between the fourth temperature and the third temperature is higher than or equal to a second threshold, determining that the contactor contact is not stuck; If the fourth temperature is higher than the third temperature, or the difference between the fourth temperature and the third temperature is lower than a second threshold, it is determined that the contactor contact is stuck.

5. The contactor contact adhesion detection method according to claim 1, characterized in that: Before controlling the contactor to disconnect and obtaining the current second temperature of the heater, the method further includes: Obtaining the starting temperature, ambient temperature and heating time of the heater; determining a theoretical temperature of the heater according to the starting temperature, the ambient temperature and the heating time; It is determined whether the temperature sensor is abnormal according to the first temperature and the theoretical temperature.

6. The contactor contact adhesion detection method according to claim 5, characterized in that: Determining whether the temperature sensor is abnormal according to the first temperature and the theoretical temperature includes: If the difference between the first temperature and the theoretical temperature is not within a preset range, determining that the temperature sensor is abnormal; If the difference between the first temperature and the theoretical temperature is within a preset range, it is determined that the temperature sensor is normal.

7. The contactor contact adhesion detection method according to claim 1, characterized in that: After determining whether the contact of the contactor is stuck according to the difference between the second temperature, the third temperature and the fourth temperature, the method further includes: If the contactor contacts are stuck, a fault alarm is issued and the fan is turned on to cool the heater.

8. A contactor contact adhesion detection device, characterized in that: It includes a heater, a fan, a temperature sensor and a control module. The contactor is used to control the power on and off of the heater, and the fan is used to cool the heater. The control module is used to control the contactor to be turned on, and obtain the first temperature information of the contactor through the temperature sensor; Controlling the contactor to disconnect, and obtaining the current second temperature of the heater through the temperature sensor; After the contactor is disconnected, the fan is controlled to run for a first preset time, and a third temperature of the heater when the fan stops running is obtained through the temperature sensor; After the fan runs for a first preset time, controlling the heater to stand for a second preset time, and obtaining a fourth temperature of the heater after the heater stands for a second preset time through the temperature sensor; Whether the contactor is stuck is determined according to the degree of difference among the second temperature, the third temperature, and the fourth temperature.

9. An electronic device, characterized in that: The electronic device comprises: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the contactor contact adhesion detection method as described in any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the contactor contact adhesion detection method as described in any one of claims 1 to 7 is implemented.

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