Method and device for managing pre-charging processing, equipment and storage medium

Abstract

The embodiment of the invention provides a method and device for managing pre-charging processing, equipment and a storage medium, and belongs to the technical field of electric appliances. According to the method, in the pre-charging processing process of the capacitive load, the input current and the input voltage of the capacitive load are detected, and when the input voltage is lower than a first voltage threshold value or the input current is higher than a first current threshold value, power supply to the capacitive load is stopped. Due to the fact that the input voltage is too small or the input current is too large possibly due to the fact that the equivalent capacitance of the capacitive load is too large, the problem that the capacitance of the capacitive load is too large can be found in time through the processing mode, and component damage caused by the fact that the current peak value is too high is prevented.

Description

Technical Field

[0001] The present disclosure relates to the field of electrical appliance technologies, and particularly to a method, an apparatus, a device, and a storage medium for managing pre-charging processing. Background Art

[0002] In many devices, a power supply system composed of a battery and a capacitive load is adopted. For example, the working components inside an electric vehicle can be equivalent to a capacitor, that is, a capacitive load, and connecting with the battery forms a power supply system.

[0003] Such a power supply system needs to perform pre-charging processing when powered on. The pre-charging processing is to connect a pre-charge resistor to the power supply circuit of the capacitive load. In this way, the capacitive load is pre-charged, and the pre-charge resistor can protect the components in the circuit from being impacted by large currents.

[0004] For a device with such a power supply system, errors in the processing and production process may cause the capacitive load to not meet the requirements, and further cause the pre-charging processing to not achieve the expected effect, the current peak value is still too large, resulting in component damage. Or, during the use of the device, the electrical characteristics of the capacitive load may change with use and gradually reach a non-compliant level, and the current peak value of the pre-charging processing is still too large, resulting in component damage. Summary of the Invention

[0005] To solve the related technical problems, embodiments of the present disclosure provide a method, an apparatus, a device, and a storage medium for managing pre-charging processing. The technical solutions are as follows:

[0006] In a first aspect, a method for managing pre-charging processing is provided. The method is applied to a power supply system of a capacitive load, and the method includes:

[0007] When the capacitive load is powered on, perform pre-charging processing on the capacitive load;

[0008] During the pre-charging processing, detect the input current and input voltage of the capacitive load;

[0009] When the input voltage is lower than a first voltage threshold, or the input current is higher than a first current threshold, terminate power supply to the capacitive load.

[0010] In a possible implementation manner, before the step of when the input voltage is lower than a first voltage threshold, or the input current is higher than a first current threshold, terminate power supply to the capacitive load, the method further includes:

[0011] Based on the corresponding relationship between the elapsed time of the pre-charging processing and the voltage threshold, determine the first voltage threshold corresponding to the current elapsed time of the pre-charging processing.

[0012] In a possible implementation, before the capacitive load is powered on, the method further includes:

[0013] Determine the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected;

[0014] For each value of the elapsed time of the pre-charge process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed time, calculate the predicted input voltage of the capacitive load as the voltage threshold corresponding to the value of the elapsed time;

[0015] Based on the voltage thresholds corresponding to each value of the elapsed time of the pre-charge process, establish the correspondence between the elapsed time of the pre-charge process and the voltage thresholds.

[0016] In a possible implementation, before terminating the power supply to the capacitive load when the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the method further includes:

[0017] Based on the correspondence between the elapsed time of the pre-charge process and the current threshold, determine the first current threshold corresponding to the current elapsed time of the pre-charge process.

[0018] In a possible implementation, before the capacitive load is powered on, the method further includes:

[0019] Determine the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected;

[0020] For each value of the elapsed time of the pre-charge process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed time, calculate the predicted input current of the capacitive load as the current threshold corresponding to the value of the elapsed time;

[0021] Based on the current thresholds corresponding to each value of the elapsed time of the pre-charge process, establish the correspondence between the elapsed time of the pre-charge process and the current thresholds.

[0022] In a possible implementation, the method further includes:

[0023] When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, output a pre-charge failure signal to the target device.

[0024] In a possible implementation, after the capacitive load is precharged, the method further includes:

[0025] When the elapsed time of the precharge process reaches the target time, if the input voltage is greater than the second voltage threshold and the input current is less than the second current threshold, the precharge process ends and power is supplied to the capacitive load, where the second voltage threshold is less than the voltage of the battery in the power supply system, the second voltage threshold is greater than the first voltage threshold, and the second current threshold is less than the first current threshold.

[0026] In a second aspect, a device for managing the precharge process is provided. The device includes:

[0027] A precharge module for precharging the capacitive load when the capacitive load is powered on;

[0028] A detection module for detecting the input current and input voltage of the capacitive load during the precharge process;

[0029] A termination module for terminating the power supply to the capacitive load when the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold.

[0030] In a possible implementation, the device further includes a determination module for:

[0031] Determining a first voltage threshold corresponding to the current elapsed time of the precharge process based on the corresponding relationship between the elapsed time of the precharge process and the voltage threshold.

[0032] In a possible implementation, the device further includes an establishment module for:

[0033] Determining the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected;

[0034] For each value of the elapsed time of the precharge process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculating the expected input voltage of the capacitive load based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed time, as the voltage threshold corresponding to the value of the elapsed time;

[0035] Based on the voltage thresholds corresponding to each value of the elapsed time of the precharge process, establishing the corresponding relationship between the elapsed time of the precharge process and the voltage threshold.

[0036] In a possible implementation, the determination module is further configured to:

[0037] Determine a first current threshold corresponding to the current elapsed duration of the pre-charging process based on the corresponding relationship between the elapsed duration and the current threshold of the pre-charging process.

[0038] In a possible implementation manner, the establishing module is further configured to:

[0039] Determine the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected;

[0040] For each value of the elapsed duration of the pre-charging process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculate the predicted input current of the capacitive load based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed duration, and use it as the current threshold corresponding to the value of the elapsed duration;

[0041] Based on the current threshold corresponding to each value of the elapsed duration of the pre-charging process, establish the corresponding relationship between the elapsed duration and the current threshold of the pre-charging process.

[0042] In a possible implementation manner, the device further includes an output module, configured to:

[0043] When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, output a pre-charging failure signal to the target device.

[0044] In a possible implementation manner, the device further includes a pre-charging end module, configured to:

[0045] When the elapsed duration of the pre-charging process reaches the target duration, if the input voltage is greater than the second voltage threshold and the input current is less than the second current threshold, end the pre-charging process and supply power to the capacitive load, where the second voltage threshold is less than the voltage of the battery in the power supply system, the second voltage threshold is greater than the first voltage threshold, and the second current threshold is less than the first current threshold.

[0046] In a third aspect, a computer device is provided. The computer device includes a memory and a processor. The memory is used to store computer instructions, and the processor executes the computer instructions stored in the memory so that the computer device executes the method provided in the first aspect and its possible implementation manners.

[0047] In a fourth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer program code. When the computer program code is executed by a computer device, the computer device executes the method provided in the first aspect and its possible implementation manners.

[0048] In a fifth aspect, a computer program product is provided. The computer program product includes computer program code, and when the computer program code is executed by a computer device, the computer device executes the method provided in the first aspect and its possible implementation manners.

[0049] By using this method, during the pre-charging process of a capacitive load, the input current and input voltage of the capacitive load are detected. When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the power supply to the capacitive load is terminated. Since an overly large equivalent capacitance of the capacitive load may cause its input voltage to be too small or its input current to be too large, this processing method can timely detect the problem of an overly large capacitance of the capacitive load, so as to prevent component damage caused by an overly high current peak. Description of the Drawings

[0050] Figure 1 is a schematic structural diagram of an electric device provided by an embodiment of the present disclosure;

[0051] Figure 2 is a schematic structural diagram of a power supply system provided by an embodiment of the present disclosure;

[0052] Figure 3 is a schematic structural diagram of a battery controller provided by an embodiment of the present disclosure;

[0053] Figure 4 is a schematic processing flow diagram of a method for managing pre-charging provided by an embodiment of the present disclosure;

[0054] Figure 5 is a schematic processing flow diagram of a method for establishing a correspondence relationship between the elapsed time of pre-charging and a voltage threshold provided by an embodiment of the present disclosure;

[0055] Figure 6 is a schematic processing flow diagram of a method for establishing a correspondence relationship between the elapsed time of pre-charging and a current threshold provided by an embodiment of the present disclosure;

[0056] Figure 7 is a schematic structural diagram of a device for managing pre-charging provided by an embodiment of the present disclosure. Detailed Embodiments

[0057] Embodiments of the present disclosure provide a method for managing pre-charging processing. This method can be applied to electric devices, which adopt a power supply system composed of a battery and a capacitive load. For example, the electric device can be an electric vehicle, an autonomous mobile robot (AMR) cart, etc. The working components of an electric vehicle can be equivalent to a capacitor, that is, a capacitive load, and the capacitive load is connected to the battery to form a power supply system. The working components of an AMR cart can be equivalent to a capacitor, that is, a capacitive load, and the capacitive load is connected to the battery to form a power supply system. Embodiments of the present disclosure take the AMR cart as an example to elaborate on the solution in detail, and other situations are similar and will not be elaborated further.

[0058] From the perspective of hardware composition, as Figure 1 shown, the electric device may include a power supply system 110, a mechanical component 120, etc. As Figure 2 shown, the power supply system may include a battery 210, a capacitive load 220, a pre-charge resistor 230, a control switch 240, a sensor 250, a battery controller 260, etc.

[0059] The battery 210 is used to supply power to the capacitive load.

[0060] The capacitive load 220 can be a working component that needs to be powered. The working component can be equivalent to a capacitor, so it can be called a capacitive load.

[0061] The pre-charge resistor 230 is used to reduce the inrush current at the initial stage of power-on of the power supply system.

[0062] The control switch 240 is a switch used to control the power supply to the capacitive load and pre-charging processing, including a main switch and a pre-charge switch.

[0063] The sensor 250 is used to detect the input voltage and input current, such as a voltmeter, an ammeter, etc.

[0064] The battery controller 260 is a controller for power supply management, and its functions include managing pre-charging processing. It can be a chip with certain processing capabilities.

[0065] The method for pre-charge management in embodiments of the present disclosure can be executed by the battery controller. As Figure 3 shown, the battery controller may include a processor 310 and a memory 320.

[0066] The processor 310 is used for a central processing unit (CPU) or a system on chip (SoC), etc. The processor 310 can be used to calculate parameters involved in this method, such as a first voltage threshold, a first current threshold, etc.

[0067] The memory 320 may include various volatile memories or non-volatile memories, such as solid state disks (SSDs), dynamic random access memories (DRAMs), etc. The memory 320 can be used to store pre-stored data, intermediate data, and result data during business processing. For example, the correspondence between the access capacitance upper limit, the elapsed time of the pre-charge process, and the voltage threshold, etc.

[0068] The process of pre-charging a capacitive load is as follows: As shown in Figure 2 , when the battery powers the capacitive load, the pre-charge switch is first turned on and the main switch is kept off. At this time, the pre-charge resistor is connected to the circuit to prevent the impact of excessive current on electrical components. The sensor is used to monitor the input voltage and input current of the capacitive load. For example, an ammeter can be connected in series in the pre-charge circuit, and a voltmeter can be connected in parallel across the capacitive load. When the pre-charge process has been carried out for a certain period of time, the pre-charge process can be ended, and the main switch is turned on to supply power to the capacitive load.

[0069] In practical applications, there may be a problem that the capacitive load is non-compliant after the AMR vehicle is processed, mainly because its equivalent capacitance is too high, which may cause the peak current to be too large during the operation of the power supply system. Or, during the use of the AMR vehicle, the electrical characteristics of the capacitive load will also gradually change. Even if the capacitive load is qualified at the time of factory shipment, during the use process, it may also have problems with unqualified electrical characteristics as the electrical characteristics gradually change, mainly manifested as too high equivalent capacitance, which may cause the peak current to be too large during the operation of the power supply system.

[0070] An embodiment of the present disclosure provides a method for managing pre-charge processing. This method is applied to the power supply system of a capacitive load. The processing flow of this method can be as shown in Figure 4 and includes the following steps:

[0071] 401. When the capacitive load is powered on, perform pre-charge processing on the capacitive load.

[0072] For AMR vehicles, before leaving the factory, it is necessary to detect whether each AMR vehicle is compliant. At this time, pre-charge processing can be performed on the AMR vehicle. If the pre-charge fails, the AMR vehicle does not meet the factory requirements; or, when the AMR vehicle is put into use after leaving the factory, it can also be detected whether the AMR vehicle is compliant during operation. If the pre-charge fails, the user can repair it by himself or at a nearby repair location; or, the maintenance personnel will regularly check whether the AMR vehicle is compliant. During the maintenance process, the maintenance personnel can use the battery to perform pre-charge processing on the AMR vehicle. If the pre-charge fails, it means that the AMR vehicle has a fault, so the maintenance personnel need to repair the AMR vehicle.

[0073] For example, when the user wants to use the AMR vehicle, the power switch of the AMR vehicle can be turned on. At this time, the battery controller is powered on, and the battery controller will first turn on the pre-charge switch. At this time, the pre-charge resistor is connected to the circuit to perform pre-charge processing on the AMR vehicle.

[0074] 402. During the pre-charge process, the input current and input voltage of the capacitive load are detected.

[0075] During the pre-charge process of the capacitive load, the sensors (ammeter, voltmeter) in the circuit monitor the input current and input voltage of the capacitive load in real time, and send the monitored data to the battery controller. The battery controller can obtain the input current and input voltage according to the preset cycle duration (for example, 10 milliseconds or 50 milliseconds, etc.), make judgments on subsequent steps, and perform corresponding processing based on the judgment results until the pre-charge process ends.

[0076] 403. When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the power supply to the capacitive load is terminated.

[0077] The first voltage threshold can be a fixed value set by technicians based on experience. The first voltage threshold can also be determined by looking up the corresponding relationship table of the elapsed time and voltage threshold of the pre-charge process established in advance. For example, a corresponding relationship table of the elapsed time and voltage threshold of the pre-charge process as shown in Table 1 can be established in advance. After the pre-charge process starts, whenever the above cycle duration is reached, the battery controller can look up the voltage threshold corresponding to the current elapsed time of the pre-charge process in Table 1 as the first voltage threshold. The specific content of establishing the corresponding relationship table will be described in detail in the following processing flow. For example, if the current elapsed time of the pre-charge process is 0.1 seconds and the corresponding first voltage threshold is 100V, then when the current elapsed time of the pre-charge process is 0.1 seconds, the first voltage threshold is 1.5A, that is, the input voltage of the capacitive load cannot be lower than 100V.

[0078] Table 1

[0079] Elapsed duration of the precharge process Voltage threshold 0.1 second 100V 0.3 second 250V …… ……

[0080] The first current threshold can be a fixed value set by a technician based on experience. The first current threshold can also be determined by looking up a pre-established correspondence table of the elapsed duration of the pre-charging process and the current threshold. For example, a correspondence table of the elapsed duration of the pre-charging process and the current threshold as shown in Table 2 can be pre-established. When determining the current elapsed duration of the pre-charging process, the battery controller can look up the current threshold corresponding to the current elapsed duration of the pre-charging process in Table 2 as the first current threshold. The specific content of establishing the correspondence table will be described in detail in the following processing flow. For example, if the elapsed duration of the pre-charging process is 0.1 second and the corresponding current threshold is 1.5 A, then when the current elapsed duration of the pre-charging process is 0.1 second, the first current threshold is 1.5 A, that is, the input current of the capacitive load cannot exceed 1.5 A.

[0081] Table 2

[0082] Elapsed duration of the precharge process Current threshold 0.1 second 1.5A 0.3 second 1A …… ……

[0083] In addition, Table 1 and Table 2 above can be combined into one table. For example, as shown in Table 3, a correspondence table of the elapsed duration of the pre-charging process, the voltage threshold, and the current threshold can be established, and when looking up the table, the correspondence table of the elapsed duration of the pre-charging process, the voltage threshold, and the current threshold as shown in Table 3 can be directly looked up.

[0084] Table 3

[0085] Elapsed duration of the precharge process Voltage threshold Current threshold 0.1 second 100V 1.5A 0.3 second 250V 1A …… …… ……

[0086] The input voltage and input current can be monitored by sensors. For example, an ammeter can be connected in series in the circuit, and a voltmeter can be connected in parallel across the capacitive load. The monitored input voltage and input current can be sent to the processor, and the processor determines whether the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold. When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the power supply to the capacitive load is terminated.

[0087] In addition, when the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the battery controller may output a pre-charging failure signal to the target device. The target device may be a device with a display function, such as a mobile phone, a tablet computer, a laptop computer, a desktop computer, a vehicle-mounted terminal, etc. For example, when the capacitive load is an AMR vehicle, the target device may be the management device of the AMR vehicle. Technicians can view the usage of the AMR vehicle through the management device. When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, it indicates that when the target duration is reached, the input voltage and input current of the capacitive load do not meet the requirements of the pre-charging process. The equivalent capacitance of the capacitive load exceeds the upper limit of the connected capacitance, or other components in the circuit fail. Pre-charging in this way will cause the pre-charge resistor to overheat. Therefore, power supply to the capacitive load should be terminated, and the battery controller sends a pre-charging failure signal to the management device of the AMR vehicle. When the management device receives this signal, it can display pre-charging failure.

[0088] When the elapsed time of the pre-charging process reaches the target duration, if the input voltage is greater than the second voltage threshold and the input current is less than the second current threshold, the pre-charging process ends, and the main switch is turned on to continue supplying power to the capacitive load. The second voltage threshold and the second current threshold can be preset by technicians. For example, the second voltage threshold is 95% of the voltage of the battery in the power supply system, and the second current threshold is 0.5 A, etc. When the elapsed time of the pre-charging process reaches the target duration, if the input voltage is less than the second voltage threshold or the input current is greater than the second current threshold, it indicates that when the target duration is reached, the input voltage and input current of the capacitive load have not reached the requirements for the completion of pre-charging. The equivalent capacitance of the capacitive load exceeds the upper limit of the connected capacitance, or other components in the circuit fail. Pre-charging in this way will cause the pre-charge resistor to overheat. Therefore, power supply to the capacitive load should be terminated, and a pre-charging failure signal is output to the target device.

[0089] For example, when the battery supplies power to an AMR vehicle, when the elapsed time of the pre-charging process reaches the target duration, if the input voltage of the AMR vehicle is greater than 95% of the voltage of the battery in the power supply system and the input current is less than 0.5 A, then the pre-charging is successful, indicating that the AMR vehicle can work normally and does not need repair. If the pre-charging fails, the battery controller sends a pre-charging failure signal to the management device of the AMR vehicle. When the management device receives this signal, it can display pre-charging failure. After seeing the pre-charging failure displayed on the management device, users or maintenance personnel can repair the AMR vehicle.

[0090] In a possible implementation manner, the processing flow for establishing the correspondence between the elapsed time of the pre-charging process and the voltage threshold may be as Figure 5 shown, including the following steps:

[0091] 501. Determine the upper limit of the access capacitance of the battery in the power supply system.

[0092] Among them, the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected. The upper limit of the access capacitance is determined by the battery, and the upper limits of the access capacitances of the same type of battery are the same. The capacitances of the capacitive loads on different vehicles may be different.

[0093] 502. For each value of the elapsed time of the pre-charging process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculate the predicted input voltage of the capacitive load based on the voltage, equivalent capacitance, and value of the elapsed time of the battery, and use it as the voltage threshold corresponding to the value of the elapsed time.

[0094] When assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, the predicted input voltage corresponding to the elapsed time of the capacitive load can be calculated according to the formula . Among them, U pack (t) is the predicted input voltage, t is the elapsed time of the pre-charging process, and its value range is within the target time, U bat is the voltage of the battery, R 预充电阻 is the resistance value of the pre-charge resistor in the power supply system, and C 最大电容 is the upper limit of the access capacitance. According to the above formula, it can be seen that the input voltage is inversely proportional to the equivalent capacitance of the capacitive load. When the equivalent capacitance of the capacitive load exceeds the upper limit of the access capacitance, the input voltage will be lower than the first voltage threshold. Calculate the predicted input voltage of the upper limit of the access capacitance and use it as the voltage threshold corresponding to the value of the elapsed time.

[0095] 503. Based on the voltage threshold corresponding to each value of the elapsed time of the pre-charging process, establish the corresponding relationship between the elapsed time of the pre-charging process and the voltage threshold.

[0096] For different values of the elapsed time of the pre-charging process, repeat step 502, and the voltage thresholds corresponding to different elapsed times of the pre-charging process can be obtained. Based on these data, the corresponding relationship between the elapsed time of the pre-charging process and the voltage threshold can be established. For example, the corresponding relationship table between the elapsed time of the pre-charging process and the voltage threshold as shown in Table 1 can be established.

[0097] In addition, the data in the above corresponding relationship table can be used as samples to train a machine learning model, and the trained machine learning model is used as the machine learning model for determining the voltage threshold. When determining the elapsed time of the pre-charging process, input the elapsed time of the pre-charging process into the machine learning model for determining the voltage threshold, and the voltage threshold corresponding to the elapsed time of the pre-charging process can be obtained.

[0098] In a possible implementation, the processing flow for establishing the corresponding relationship between the elapsed time of the pre-charging process and the current threshold can be asFigure 6 As shown, it includes the following steps:

[0099] 601. Determine the upper limit of the access capacitance of the battery in the power supply system.

[0100] Among them, the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected. The upper limit of the access capacitance is determined by the battery, and the upper limits of the access capacitances of the same type of battery are the same. The capacitances of the capacitive loads on different vehicles may be different.

[0101] 602. For each value of the elapsed time of the pre-charge process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculate the predicted input current of the capacitive load based on the voltage, equivalent capacitance, and the value of the elapsed time of the battery, and use it as the current threshold corresponding to the value of the elapsed time.

[0102] When assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, the predicted input current corresponding to the elapsed time of the capacitive load can be calculated according to the formula where I pack (t) is the predicted input current, t is the elapsed time of the pre-charge process, and the value range is within the target time. U bat is the voltage of the battery, R 预充电阻 is the resistance value of the pre-charge resistor in the power supply system, and C 最大电容 is the upper limit of the access capacitance. According to the above formula, it can be known that the input current is proportional to the equivalent capacitance of the capacitive load. When the equivalent capacitance of the capacitive load exceeds the upper limit of the access capacitance, the input current will exceed the first current threshold. Calculate the predicted input current of the upper limit of the access capacitance as the current threshold corresponding to the value of the elapsed time.

[0103] 603. Based on the current threshold corresponding to each value of the elapsed time of the pre-charge process, establish the corresponding relationship between the elapsed time of the pre-charge process and the current threshold.

[0104] For different values of the elapsed time of the pre-charge process, repeat step 602, and the current thresholds corresponding to different elapsed times of the pre-charge process can be obtained. Based on these data, the corresponding relationship between the elapsed time of the pre-charge process and the current threshold can be established. For example, the corresponding relationship table between the elapsed time of the pre-charge process and the current threshold as shown in Table 2 can be established.

[0105] In addition, the data in the above corresponding relationship table can be used as samples to train a machine learning model, and the trained machine learning model can be used as the machine learning model for determining the current threshold. When determining the elapsed time of the pre-charge process, input the elapsed time of the pre-charge process into the machine learning model for determining the current threshold, and the current threshold corresponding to the elapsed time of the pre-charge process can be obtained.

[0106] In addition, if the user uses this power supply system to supply power to a low-resistance load, it will cause the input current to be in a large state during the power supply process, which may damage the electrical components in the circuit. Therefore, when the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the power supply to the load is terminated, and a pre-charge failure signal is output to the target device.

[0107] In the embodiments of the present disclosure, during the pre-charge process of the capacitive load, the input current and input voltage of the capacitive load are detected. When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the power supply to the capacitive load is terminated. Since the equivalent capacitance of the capacitive load is too large, it may cause its input voltage to be too small or the input current to be too large. Therefore, through this processing method, the problem of too large capacitance of the capacitive load can be found in time to prevent component damage caused by too high current peaks.

[0108] All the above optional technical solutions can be combined arbitrarily to form optional embodiments of the present disclosure, which will not be elaborated one by one here.

[0109] The embodiments of the present disclosure also provide a device for managing pre-charge processing, as Figure 7 shown. The device includes:

[0110] A pre-charge module 710, configured to perform a pre-charge process on the capacitive load when the capacitive load is powered on. Specifically, it can implement the processing functions of the above step 401 and other implicit steps.

[0111] A detection module 720, configured to detect the input current and input voltage of the capacitive load during the pre-charge process. Specifically, it can implement the processing functions of the above step 402 and other implicit steps.

[0112] A termination module 730, configured to terminate the power supply to the capacitive load when the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold. Specifically, it can implement the processing functions of the above step 403 and other implicit steps.

[0113] In a possible implementation manner, the device further includes a determination module 740, configured to: determine the first voltage threshold corresponding to the current elapsed time of the pre-charge process based on the corresponding relationship between the elapsed time of the pre-charge process and the voltage threshold. Specifically, it can implement the processing functions of the above step 403 and other implicit steps.

[0114] In a possible implementation, the device further includes an establishing module 750, configured to: determine the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected; for each value of the elapsed time of the pre-charging process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculate the predicted input voltage of the capacitive load based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed time, and use it as the voltage threshold corresponding to the value of the elapsed time; based on the voltage threshold corresponding to each value of the elapsed time of the pre-charging process, establish the corresponding relationship between the elapsed time of the pre-charging process and the voltage threshold. Specifically, it can implement the processing functions of the above steps 501, 502, and 503, as well as other implicit steps.

[0115] In a possible implementation, the determining module 740 is further configured to: determine the first current threshold corresponding to the current elapsed time of the pre-charging process based on the corresponding relationship between the elapsed time of the pre-charging process and the current threshold. Specifically, it can implement the processing function of the above step 403, as well as other implicit steps.

[0116] In a possible implementation, the establishing module 750 is further configured to: determine the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected; for each value of the elapsed time of the pre-charging process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculate the predicted input current of the capacitive load based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed time, and use it as the current threshold corresponding to the value of the elapsed time; based on the current threshold corresponding to each value of the elapsed time of the pre-charging process, establish the corresponding relationship between the elapsed time of the pre-charging process and the current threshold. Specifically, it can implement the processing functions of the above steps 601, 602, and 603, as well as other implicit steps.

[0117] In a possible implementation, the device further includes an output module 760, configured to: when the input voltage is lower than the first voltage threshold, or the input current is higher than the first current threshold, output a pre-charging failure signal to the target device. Specifically, it can implement the processing function of the above step 403, as well as other implicit steps.

[0118] In a possible implementation, the device further includes a pre-charging end module 770, configured to: when the elapsed time of the pre-charging process reaches the target time, the input voltage is greater than the second voltage threshold, and the input current is less than the second current threshold, end the pre-charging process and supply power to the capacitive load, where the second voltage threshold is less than the voltage of the battery in the power supply system, the second voltage threshold is greater than the first voltage threshold, and the second current threshold is less than the first current threshold. Specifically, it can implement the processing function of the above step 403, as well as other implicit steps.

[0119] The above pre-charging module 710, detection module 720, termination module 730, determination module 740, establishment module 750, output module 760, and end pre-charging module 770 can be implemented by a processor, or implemented by a processor in cooperation with a memory and a display.

[0120] In the embodiments of the present disclosure, during the pre-charging process of a capacitive load, the input current and input voltage of the capacitive load are detected. When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the power supply to the capacitive load is terminated. Since the equivalent capacitance of the capacitive load being too large may cause its input voltage to be too small or its input current to be too large, this processing method can timely detect the problem of the capacitive load having too large a capacitance, so as to prevent component damage caused by an excessively high current peak.

[0121] When the device for managing pre-charging processing provided in the above embodiments is running, only the division of the above functional modules is used for illustration. In actual applications, the above functions can be allocated to different functional modules as needed, that is, the internal structure of the electric device is divided into different functional modules to complete all or part of the functions described above. In addition, the device for managing pre-charging processing provided in the above embodiments and the method embodiments for managing pre-charging processing belong to the same concept. The specific implementation process is detailed in the method embodiments and will not be elaborated here.

[0122] The embodiments of the present disclosure also provide a computer-readable storage medium. The computer-readable storage medium can be any available medium that can be stored by a computing device or a data storage device such as a data center including one or more available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid-state drive), etc. The computer-readable storage medium includes instructions that instruct the computing device to execute the method for business processing, or instruct the computing device to execute the method for business processing.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for managing pre-charging processing, characterized in that, The method is applied to a power supply system for a capacitive load, and the method includes: When the capacitive load is powered on, perform a pre-charge process on the capacitive load; During the pre-charge process, detect the input current and input voltage of the capacitive load; When the input voltage is lower than a first voltage threshold or the input current is higher than a first current threshold, terminate the power supply to the capacitive load.

2. The method according to claim 1, characterized in that, Before the step of terminating the power supply to the capacitive load when the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the method further includes: Based on the correspondence between the elapsed time of the pre-charge process and the voltage threshold, determine the first voltage threshold corresponding to the current elapsed time of the pre-charge process.

3. The method according to claim 2, characterized in that, Before the capacitive load is powered on, the method further includes: Determine the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected; For each value of the elapsed time of the pre-charge process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculate the predicted input voltage of the capacitive load based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed time, and use it as the voltage threshold corresponding to the value of the elapsed time; Based on the voltage thresholds corresponding to each value of the elapsed time of the pre-charge process, establish the correspondence between the elapsed time of the pre-charge process and the voltage threshold.

4. The method according to claim 1, characterized in that, Before the step of terminating the power supply to the capacitive load when the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, the method further includes: Based on the correspondence between the elapsed time of the pre-charge process and the current threshold, determine the first current threshold corresponding to the current elapsed time of the pre-charge process.

5. The method according to claim 2, characterized in that, Before the capacitive load is powered on, the method further includes: Determine the upper limit of the access capacitance of the battery in the power supply system, where the upper limit of the access capacitance is the maximum capacitance that the battery allows to be directly connected; For each value of the elapsed time of the pre-charge process, assuming that the equivalent capacitance of the capacitive load is the upper limit of the access capacitance, calculate the predicted input current of the capacitive load based on the voltage of the battery, the equivalent capacitance, and the value of the elapsed time, and use it as the current threshold corresponding to the value of the elapsed time; Based on the current thresholds corresponding to each value of the elapsed time of the pre-charge process, establish the correspondence between the elapsed time of the pre-charge process and the current threshold.

6. The method according to claim 1, characterized in that, The method further includes: When the input voltage is lower than the first voltage threshold or the input current is higher than the first current threshold, output a pre-charge failure signal to the target device.

7. The method according to claim 1, characterized in that, After the step of performing the pre-charge process on the capacitive load, the method further includes: When the elapsed time of the pre-charge process reaches the target time, if the input voltage is greater than a second voltage threshold and the input current is less than a second current threshold, end the pre-charge process and supply power to the capacitive load, where the second voltage threshold is less than the voltage of the battery in the power supply system, the second voltage threshold is greater than the first voltage threshold, and the second current threshold is less than the first current threshold.

8. A device for managing pre-charging processing, characterized in that, The device includes: a pre-charging module configured to pre-charge the capacitive load when the capacitive load is powered on; a detection module configured to detect the input current and input voltage of the capacitive load during the pre-charging process; a termination module configured to terminate the power supply to the capacitive load when the input voltage is lower than a first voltage threshold or the input current is higher than a first current threshold.

9. A computer device, characterized in that, The computer device includes a memory and a processor, where the memory is used to store computer instructions; the processor executes the computer instructions stored in the memory, so that the computer device executes the method according to any one of claims 1-7 above.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program code, and when the computer program code is executed by a computer device, the computer device executes the method according to any one of claims 1-7 above.

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