Parameter matching method, device and equipment for resistor and capacitor in power distribution device and medium

Abstract

The invention provides a parameter matching method and device for resistors and capacitors in a power distribution device, equipment and a medium. The method comprises the following steps: determining matching theoretical time of a resistor and a capacitor; according to the theoretical matching time, the resistance difference and the capacitance difference, calculating a resistance unit time theoretical variable quantity and a capacitance unit time theoretical variable quantity, and further determining a pre-charging current change conversion quantity; determining current reduction coefficients of the resistor and the capacitor by taking a preset pre-charging current change threshold as a limit; and in combination with the current reduction coefficient, the resistance unit time theoretical variable quantity and the capacitance unit time theoretical variable quantity, determining a resistance actual control quantity and a capacitance actual control quantity, and respectively controlling a resistance value and a capacitance value until target values are reached. According to the method, the time for changing the pre-charging resistor and the pre-charging capacitor in the power distribution device to the target value is equal, so that the breakdown of electric equipment by the sudden change peak of the pre-charging current is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and specifically relates to a method, device, equipment and medium for parameter matching of resistors and capacitors in a power distribution device. Background Art

[0002] The power distribution device is an important part of the high-voltage electrical system of new energy vehicles. The pre-charge circuit composed of high-voltage relays, pre-charge resistors and pre-charge capacitors configured inside it undertakes the key function of suppressing the impact current at the moment of high-voltage power-on. By reasonably matching the resistance value of the pre-charge resistor and the capacitance value of the pre-charge capacitor, the magnitude of the current in the pre-charge circuit and the pre-charge time can be effectively controlled, thereby avoiding excessive current impact on electrical equipment.

[0003] Due to the non-linear interaction between the pre-charge resistor and the pre-charge capacitor during the charging and discharging process, when adjusting the resistance value of the pre-charge resistor or the capacitance value of the pre-charge capacitor, it is easy to cause the mismatch of the electrical characteristics between the two. When the resistance value is too small or the capacitance value is too large, the pre-charge circuit will generate a peak current exceeding the design threshold, and the peak current may break down the electrical equipment on the pre-charge circuit, seriously threatening the operation safety of the high-voltage system.

[0004] Therefore, how to perform parameter collaborative optimization on the pre-charge resistor and the pre-charge capacitor to solve the safety hazards caused by the mismatch between the two is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The present application provides a method, device, equipment and medium for parameter matching of resistors and capacitors in a power distribution device, which can solve the technical problem that when adjusting the resistance value of the pre-charge resistor and the capacitance value of the pre-charge capacitor in the power distribution device, it is easy to occur that the changes in the resistance value and the capacitance value cannot cooperate with each other, resulting in a peak current in the pre-charge circuit breaking down the electrical equipment.

[0006] In a first aspect, an embodiment of the present application provides a method for parameter matching of resistors and capacitors in a power distribution device. The method for parameter matching of resistors and capacitors in the power distribution device includes:

[0007] Circularly determine the matching theoretical time of the resistor and the capacitor according to the resistance difference between the resistance value already executed in the previous state of the pre-charge resistor in the power distribution device and the target resistance value, the capacitance difference between the capacitance value already executed in the previous state of the pre-charge capacitor and the target capacitance value, the resistance unit time change ability, and the capacitance potential time change ability;

[0008] Calculate the theoretical change amount per unit time of the resistor and the theoretical change amount per unit time of the capacitor according to the theoretical matching time, the resistance difference and the capacitance difference, and determine the pre-charge current change conversion amount according to the theoretical change amount per unit time of the resistor and the theoretical change amount per unit time of the capacitor;

[0009] Taking the preset pre-charge current change threshold as a limit, determine the current reduction factors of the resistor and the capacitor according to the converted amount of the pre-charge current change;

[0010] According to the current reduction factors, the theoretical change amount of the resistor per unit time, and the theoretical change amount of the capacitor per unit time, determine the actual control amount of the resistor and the actual control amount of the capacitor respectively, and control the resistor value and the capacitor value respectively according to the actual control amount of the resistor and the actual control amount of the capacitor until the target resistor value and the target capacitor value are reached.

[0011] Combined with the first aspect, in one embodiment, the method for determining the matching theoretical time of the resistor and the capacitor according to the resistance difference between the resistance value already executed in the previous state of the pre-charge resistor and the target resistance value, the capacitance difference between the capacitance value already executed in the previous state of the pre-charge capacitor and the target capacitance value, the resistance change ability per unit time, and the capacitance potential change ability per unit time in the power distribution device includes:

[0012] Dividing the absolute value of the resistance difference by the resistance change ability per unit time to obtain the theoretical resistance change time;

[0013] Dividing the absolute value of the capacitance difference by the capacitance change ability per unit time to obtain the theoretical capacitance change time;

[0014] Taking the larger value of the theoretical resistance change time and the theoretical capacitance change time as the matching theoretical time.

[0015] Combined with the first aspect, in one embodiment, the method for calculating the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time according to the theoretical matching time, the resistance difference, and the capacitance difference includes:

[0016] Dividing the resistance difference by the theoretical matching time to obtain the theoretical change amount of the resistor per unit time;

[0017] Dividing the capacitance difference by the theoretical matching time to obtain the theoretical change amount of the capacitor per unit time.

[0018] Combined with the first aspect, in one embodiment, the method for calculating the converted amount of the pre-charge current change according to the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time includes:

[0019] Adding the first product obtained by multiplying the absolute value of the theoretical change amount of the resistor per unit time by the preset resistor conversion coefficient and the second product obtained by multiplying the absolute value of the theoretical change amount of the capacitor per unit time by the preset capacitor conversion coefficient to obtain the converted amount of the pre-charge current change.

[0020] In combination with the first aspect, in one implementation, taking the preset pre-charge current change threshold as a limit and determining the current reduction factors of the resistor and the capacitor according to the pre-charge current change conversion amount includes:

[0021] Dividing the smaller value between the pre-charge current change conversion amount and the pre-charge current change threshold by the pre-charge current change conversion amount to obtain the current reduction factor.

[0022] In combination with the first aspect, in one implementation, according to the current reduction factor, the theoretical change amount of the resistor per unit time, and the theoretical change amount of the capacitor per unit time, respectively determining the actual control amount of the resistor and the actual control amount of the capacitor, and controlling the resistor value and the capacitor value according to the actual control amount of the resistor and the actual control amount of the capacitor until the target resistor value and the target capacitor value are reached, includes:

[0023] Multiplying the theoretical change amount of the resistor per unit time by the current reduction factor to obtain the actual control amount of the resistor per unit time;

[0024] Multiplying the theoretical change amount of the capacitor per unit time by the current reduction factor to obtain the actual control amount of the capacitor per unit time;

[0025] Multiplying the actual control amount of the resistor per unit time by a preset cycle time interval to obtain the actual control amount of the resistor per cycle;

[0026] Multiplying the actual control amount of the capacitor per unit time by the cycle time interval to obtain the actual control amount of the capacitor per cycle;

[0027] Controlling the resistor value of the corresponding pre-charge resistor according to the actual control amount of the resistor per cycle;

[0028] Controlling the capacitor value of the corresponding pre-charge capacitor according to the actual control amount of the capacitor per cycle.

[0029] In combination with the first aspect, in one implementation, the method further includes:

[0030] Adding the resistor value already executed in the previous state to the actual control amount of the resistor per cycle to obtain the resistor value already executed in the current state, and updating the resistor value already executed in the previous state with the resistor value already executed in the current state;

[0031] Adding the capacitor value already executed in the previous state to the actual control amount of the capacitor per cycle to obtain the capacitor value already executed in the current state, and updating the capacitor value already executed in the previous state with the capacitor value already executed in the current state.

[0032] In a second aspect, an embodiment of the present application provides a parameter matching device for resistors and capacitors in a power distribution device. The parameter matching device for resistors and capacitors in the power distribution device includes:

[0033] In the third aspect, an embodiment of the present application provides a parameter matching device for resistors and capacitors in a power distribution device, characterized in that the parameter matching device for resistors and capacitors in the power distribution device comprises a processor, a memory, and a parameter matching program for resistors and capacitors in the power distribution device stored in the memory and executable by the processor, wherein when the parameter matching program for resistors and capacitors in the power distribution device is executed by the processor, the steps of the parameter matching method for resistors and capacitors in the power distribution device as described in any one of the above items are implemented.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, characterized in that a parameter matching program for resistors and capacitors in a power distribution device is stored on the computer-readable storage medium, wherein when the parameter matching program for resistors and capacitors in a power distribution device is executed by a processor, the steps of the parameter matching method for resistors and capacitors in a power distribution device described in any one of the above items are implemented.

[0035] The parameter matching method, device, equipment and medium of resistors and capacitors in the power distribution device provided in the embodiment of the present application determine the theoretical matching time of resistors and capacitors by cyclically determining the resistance difference between the resistance value executed in the previous state of the pre-charge resistor and the target resistance value, the capacitance difference between the capacitance value executed in the previous state of the pre-charge capacitor and the target capacitance value, the resistance unit time change capability and the capacitance potential time change capability in the power distribution device; calculate the theoretical change amount of the resistance unit time and the theoretical change amount of the capacitance unit time according to the theoretical matching time, the resistance difference and the capacitance difference, and determine the pre-charge current change conversion amount according to the theoretical change amount of the resistance unit time and the theoretical change amount of the capacitance unit time; and use the preset pre-charge current change threshold as a limit, Determine the current reduction coefficient of the resistor and capacitor according to the converted amount of the pre-charge current change; determine the actual control amount of the resistor and the actual control amount of the capacitor according to the current reduction coefficient, the theoretical change of the resistor per unit time, and the theoretical change of the capacitor per unit time, and control the resistance value and the capacitance value according to the actual control amount of the resistor and the actual control amount of the capacitor until the target resistance value and the target capacitance value are reached, so that the time required for the pre-charge resistance of the distribution device to change from the executed resistance value in the current state to the target resistance value is equal to the time required for the pre-charge capacitance to change from the executed capacitance value in the current state to the target capacitance value, thereby avoiding the uncoordinated change process of the resistance and capacitance, and further avoiding the sudden spike of the pre-charge current to break down the electrical equipment in the pre-charge circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart of an embodiment of a method for matching resistor and capacitor parameters in a power distribution device of the present application;

[0037] Figure 2 This is a functional module diagram of an embodiment of a parameter matching device for resistors and capacitors in a power distribution device of the present application;

[0038] Figure 3 This is a schematic diagram of the hardware structure of the parameter matching device for resistors and capacitors in the distribution device involved in the solution of the embodiment of the present application. Specific implementation manners

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the following will clearly and completely describe the technical solution in the embodiment of the present application with reference to the accompanying drawings in the embodiment of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0040] To make the purpose, technical solution and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the drawings.

[0041] In a first aspect, the embodiment of the present application provides a method for parameter matching of resistors and capacitors in a distribution device.

[0042] In one embodiment, referring to Figure 1 , Figure 1 This is a schematic flowchart of the first embodiment of the method for parameter matching of resistors and capacitors in the distribution device of the present application. As Figure 1 shown, the method for parameter matching of resistors and capacitors in the distribution device includes:

[0043] Step S101: Continuously determine the matching theoretical time of the resistor and the capacitor according to the resistance difference between the resistance value already executed in the previous state of the pre-charge resistor and the target resistance value, the capacitance difference between the capacitance value already executed in the previous state of the pre-charge capacitor and the target capacitance value, the resistance change ability per unit time, and the capacitance potential change ability per unit time in the distribution device.

[0044] In one embodiment, the specific steps of S101 include:

[0045] Subtract the target resistance value from the resistance value already executed in the previous state of the pre-charge resistor to obtain the resistance difference, and subtract the target capacitance value from the capacitance value already executed in the previous state of the pre-charge capacitor to obtain the capacitance difference. The calculation formulas for the resistance difference and the capacitance difference are:

[0046]

[0047] where ΔR is the resistance difference, ΔC is the capacitance difference, K-1 is the previous execution state, R1 is the target resistance value, and C1 is the target capacitance value.

[0048] Divide the absolute value of the resistance difference by the resistance change ability per unit time to obtain the theoretical resistance change time, and divide the absolute value of the capacitance difference by the capacitance change ability per unit time to obtain the theoretical capacitance change time. The calculation formulas for the theoretical resistance change time and the theoretical capacitance change time are as follows:

[0049]

[0050] Among them, Δtimer is the theoretical resistance change time, Δtimec is the theoretical capacitance change time, ΔRMAX is the resistance change ability per unit time, and ΔCMAX is the capacitance change ability per unit time.

[0051] Take the larger value of the theoretical resistance change time and the theoretical capacitance change time as the theoretical matching time. The calculation formula for the theoretical matching time of the resistance and the capacitance is as follows:

[0052] Δtime = MAX(Δtimer, Δtimer)

[0053] Among them, Δtime is the theoretical matching time of the resistance and the capacitance.

[0054] Step S102: Calculate the theoretical change amount of the resistance per unit time and the theoretical change amount of the capacitance per unit time according to the theoretical matching time, the resistance difference, and the capacitance difference, and determine the conversion amount of the precharge current change according to the theoretical change amount of the resistance per unit time and the theoretical change amount of the capacitance per unit time.

[0055] Specifically, calculating the theoretical change amount of the resistance per unit time and the theoretical change amount of the capacitance per unit time according to the theoretical matching time, the resistance difference, and the capacitance difference includes:

[0056] Divide the resistance difference by the theoretical matching time to obtain the theoretical change amount of the resistance per unit time, and divide the capacitance difference by the theoretical matching time to obtain the theoretical change amount of the capacitance per unit time. The calculation formulas for the theoretical change amount of the resistance per unit time and the theoretical change amount of the capacitance per unit time are as follows:

[0057]

[0058] Among them, ΔR1 is the theoretical change amount of the resistance per unit time; ΔC1 is the theoretical change amount of the capacitance per unit time.

[0059] Further, calculating the conversion amount of the precharge current change according to the theoretical change amount of the resistance per unit time and the theoretical change amount of the capacitance per unit time includes:

[0060] The first product obtained by multiplying the absolute value of the theoretical change of the resistor per unit time by a preset resistor conversion coefficient is added to the second product obtained by multiplying the absolute value of the theoretical change of the capacitor per unit time by a preset capacitor conversion coefficient to obtain the converted amount of the precharge current change. The calculation formula for the converted amount of the precharge current change is:

[0061] ΔI = |ΔR1| * β1 + |ΔC1| * β2

[0062] Where ΔI is the converted amount of the precharge current change, β1 is the resistor conversion coefficient; β2 is the capacitor conversion coefficient. The resistor conversion coefficient and the capacitor conversion coefficient are calibration values and can be set according to the actual situation.

[0063] Step S103: Using the preset precharge current change threshold as a limit, determine the current reduction coefficients of the resistor and the capacitor according to the converted amount of the precharge current change.

[0064] Specifically, the specific steps of step S103 include: dividing the smaller value between the converted amount of the precharge current change and the precharge current change threshold by the converted amount of the precharge current change to obtain the current reduction coefficient. The calculation formula for the current reduction coefficients of the resistor and the capacitor is:

[0065]

[0066] Where ρ is the current reduction coefficient of the resistor and the capacitor, and ΔIMAX is the precharge current change threshold, where the precharge current change threshold can be set according to the precharge current parameter limit of the power distribution device.

[0067] Step S104: According to the current reduction coefficient, the theoretical change of the resistor per unit time, and the theoretical change of the capacitor per unit time, respectively determine the actual control amounts of the resistor and the capacitor, and control the resistor value and the capacitor value respectively according to the actual control amounts of the resistor and the capacitor until the target resistor value and the target capacitor value are reached.

[0068] Specifically, the specific steps of step S104 include:

[0069] Multiplying the theoretical change of the resistor per unit time by the current reduction coefficient to obtain the actual control amount of the resistor per unit time, and multiplying the theoretical change of the capacitor per unit time by the current reduction coefficient to obtain the actual control amount of the capacitor per unit time. The calculation formula for the actual control amount of the resistor per unit time and the actual control amount of the capacitor per unit time is:

[0070]

[0071] Where ΔR2 is the actual control amount of the resistor per unit time, and ΔC2 is the actual control amount of the capacitor per unit time.

[0072] Multiply the actual control amount of the resistor per unit time by a preset periodic time interval to obtain the actual control amount of the resistor per single period, and multiply the actual control amount of the capacitor per unit time by the periodic time interval to obtain the actual control amount of the capacitor per single period. The calculation formulas for the actual control amount of the resistor per single period and the actual control amount of the capacitor per single period are as follows:

[0073]

[0074] Among them, ΔR3 is the actual control amount of the resistor per single period, ΔC3 is the actual control amount of the capacitor per single period, and Δt is the interval time of the period.

[0075] Finally, control the resistance value of the corresponding pre-charge resistor according to the actual control amount of the resistor per single period, and control the capacitance value of the corresponding pre-charge capacitor according to the actual control amount of the capacitor per single period.

[0076] Further, add the actual control amount of the resistor per single period to the resistance value already executed in the previous state to obtain the resistance value already executed in the current state, and update the resistance value already executed in the previous state with the resistance value already executed in the current state; add the actual control amount of the capacitor per single period to the capacitance value already executed in the previous state to obtain the capacitance value already executed in the current state, and update the capacitance value already executed in the previous state with the capacitance value already executed in the current state. The calculation formulas for the resistance value already executed in the current state and the capacitance value already executed in the current state are as follows:

[0077]

[0078] Among them, R(K) is the resistance value already executed in the current state, and C(K) is the capacitance value already executed in the current state.

[0079] Then update R(K - 1) to R(K), update C(K - 1) to C(K), after a time Δt, jump to step 101, and execute in this loop until the resistance value of the pre-charge resistor reaches the target resistance value and the capacitance value of the pre-charge capacitor reaches the target capacitance value.

[0080] Explanatorily, based on the above method, the time required for the resistance value already executed in the current state and the capacitance value already executed in the current state to change to the target resistance and the target capacitance value respectively can be calculated as follows:

[0081]

[0082] Among them, time1 is the time required for the resistance value already executed in the current state to change to the target resistance, and time2 is the time required for the capacitance value already executed in the current state to change to the target capacitance.

[0083] Further, by transforming the formula, we can get:

[0084]

[0085] Furthermore, further transformation of the formula gives:

[0086]

[0087] Furthermore, further transformation of the formula gives:

[0088]

[0089] Furthermore, simplification of the formula gives:

[0090]

[0091] It can be seen that the time time1 required for the pre-charge resistor to change from the already-executed resistance value in the current state to the target resistance is equal to the time time2 required for the pre-charge capacitor to change from the already-executed capacitance value in the current state to the target capacitance, i.e., time1 = time2.

[0092] The implementation principle of this embodiment is as follows: Through precise time synchronization and current control mechanisms, ensure that the time for the resistor and capacitor to change from the current state to the target state is the same, thereby avoiding sudden spikes in the pre-charge current. First, calculate the theoretical matching time of the resistor and capacitor to determine the theoretical time required for each of them to change from the current state to the target state, and take the larger value of the two as the synchronization reference. Then, calculate the theoretical change amount per unit time of the resistor and capacitor based on the theoretical matching time and the differences in the resistor and capacitor. Next, introduce a current reduction factor to compare the converted amount of change in the pre-charge current with a preset current change threshold to determine the actual change rate of the resistor and capacitor. Adjust the theoretical change amount per unit time of the resistor and capacitor through the current reduction factor to obtain the actual control amount per unit time, and control the values of the resistor and capacitor accordingly. Finally, the time for the resistor and capacitor to change from the current state to the target state is exactly the same, achieving coordination in the change process of the resistor and capacitor, avoiding sudden spikes in the pre-charge current, and protecting the electrical equipment in the pre-charge circuit.

[0093] The method for parameter matching of resistors and capacitors in the power distribution device provided in the embodiment of the present application realizes the coordinated change of the already-executed resistance value of the pre-charge resistor and the already-executed capacitance value of the pre-charge capacitor, avoids the uncoordinated change process of the resistor and capacitor, and further avoids the pre-charge current from suddenly spiking and breaking down the electrical equipment in the pre-charge circuit.

[0094] In a second aspect, the embodiment of the present application also provides a device for parameter matching of resistors and capacitors in a power distribution device.

[0095] In one embodiment, referring to Figure 2 , Figure 2This is a schematic diagram of the functional modules of an embodiment of the parameter matching device for resistors and capacitors in the power distribution device of the present application. As Figure 2 shown, the parameter matching device for resistors and capacitors in the power distribution device includes:

[0096] A first determination module, which is used to cyclically determine the matching theoretical time of the resistor and the capacitor in the power distribution device according to the resistance difference between the resistor value already executed in the previous state of the power distribution device and the target resistor value, the capacitance difference between the capacitance value already executed in the previous state and the target capacitance value, the resistor unit time change ability, and the capacitance potential time change ability;

[0097] A second determination module, which is used to calculate the theoretical change amount per unit time of the resistor and the theoretical change amount per unit time of the capacitor according to the theoretical matching time, the resistance difference, and the capacitance difference, and determine the pre-charge current change conversion amount according to the theoretical change amount per unit time of the resistor and the theoretical change amount per unit time of the capacitor;

[0098] A third determination module, which is used to use the preset pre-charge current change threshold as a limit to determine the current reduction coefficients of the resistor and the capacitor according to the pre-charge current change conversion amount;

[0099] A control module, which is used to respectively determine the actual control amount of the resistor and the actual control amount of the capacitor according to the current reduction coefficient, the theoretical change amount per unit time of the resistor, and the theoretical change amount per unit time of the capacitor, and respectively control the resistor value and the capacitor value according to the actual control amount of the resistor and the actual control amount of the capacitor until the target resistor value and the target capacitance value are reached.

[0100] Further, in an embodiment, the first determination module is further used for:

[0101] Dividing the absolute value of the resistance difference by the resistor unit time change ability to obtain the theoretical resistance change time;

[0102] Dividing the absolute value of the capacitance difference by the capacitance unit time change ability to obtain the theoretical capacitance change time;

[0103] Taking the larger value of the theoretical resistance change time and the theoretical capacitance change time as the matching theoretical time.

[0104] Further, in an embodiment, the second determination module is further used for:

[0105] Dividing the resistance difference by the theoretical matching time to obtain the theoretical change amount per unit time of the resistor;

[0106] Dividing the capacitance difference by the theoretical matching time to obtain the theoretical change amount per unit time of the capacitor.

[0107] Further, in an embodiment, the second determination module is further used for:

[0108] The first product obtained by multiplying the absolute value of the theoretical change amount of the resistor per unit time by a preset resistor conversion coefficient is added to the second product obtained by multiplying the absolute value of the theoretical change amount of the capacitor per unit time by a preset capacitor conversion coefficient to obtain the converted amount of the precharge current change.

[0109] Further, in one embodiment, the third determination module is further configured to:

[0110] Divide the smaller value between the converted amount of the precharge current change and the precharge current change threshold by the converted amount of the precharge current change to obtain the current reduction coefficient.

[0111] Further, in one embodiment, the control module is further configured to:

[0112] Multiply the theoretical change amount of the resistor per unit time by the current reduction coefficient to obtain the actual control amount of the resistor per unit time;

[0113] Multiply the theoretical change amount of the capacitor per unit time by the current reduction coefficient to obtain the actual control amount of the capacitor per unit time;

[0114] Multiply the actual control amount of the resistor per unit time by a preset cycle time interval to obtain the actual control amount of the resistor per single cycle;

[0115] Multiply the actual control amount of the capacitor per unit time by the cycle time interval to obtain the actual control amount of the capacitor per single cycle;

[0116] Control the resistance value of the corresponding precharge resistor according to the actual control amount of the resistor per single cycle;

[0117] Control the capacitance value of the corresponding precharge capacitor according to the actual control amount of the capacitor per single cycle.

[0118] Further, in one embodiment, the control module is further configured to:

[0119] Add the executed resistance value in the previous state to the actual control amount of the resistor per single cycle to obtain the executed resistance value in the current state, and update the executed resistance value in the previous state with the executed resistance value in the current state;

[0120] Add the executed capacitance value in the previous state to the actual control amount of the capacitor per single cycle to obtain the executed capacitance value in the current state, and update the executed capacitance value in the previous state with the executed capacitance value in the current state.

[0121] Wherein, the function realization of each module in the parameter matching device of the resistor and capacitor in the above power distribution device corresponds to each step in the embodiment of the parameter matching method of the resistor and capacitor in the above power distribution device, and its function and implementation process will not be elaborated here one by one.

[0122] In a third aspect, an embodiment of the present application provides a parameter matching device for resistors and capacitors in a power distribution device. The parameter matching device for resistors and capacitors in the power distribution device may be a device with data processing functions such as a vehicle controller or an in-vehicle computer.

[0123] Referring to Figure 3 , Figure 3 FIG. is a schematic hardware structure diagram of the parameter matching device for resistors and capacitors in the power distribution device involved in the solution of the embodiment of the present application. In the embodiment of the present application, the parameter matching device for resistors and capacitors in the power distribution device may include a processor, a memory, a communication interface, and a communication bus.

[0124] Among them, the communication bus can be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0125] The communication interface includes interfaces such as input / output (I / O) interfaces, physical interfaces, and logical interfaces for interconnecting components inside the parameter matching device for resistors and capacitors in the power distribution device, as well as interfaces for interconnecting the AAAA device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0126] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical memory, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0127] The processor can be a general-purpose processor, which can call the parameter matching program for resistors and capacitors in the power distribution device stored in the memory and execute the parameter matching method for resistors and capacitors in the power distribution device provided by the embodiment of the present application. For example, the general-purpose processor can be a central processing unit (CPU). Among them, the method executed when the parameter matching program for resistors and capacitors in the power distribution device is called can refer to the various embodiments of the parameter matching method for resistors and capacitors in the power distribution device of the present application, which will not be elaborated here.

[0128] Those skilled in the art can understand, Figure 3The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0129] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0130] The computer-readable storage medium of the present application stores a parameter matching program for resistors and capacitors in a power distribution device, wherein when the parameter matching program for resistors and capacitors in a power distribution device is executed by a processor, the steps of the parameter matching method for resistors and capacitors in a power distribution device as described above are implemented.

[0131] Among them, the method implemented when the parameter matching program of resistors and capacitors in the power distribution device is executed can refer to the various embodiments of the parameter matching method of resistors and capacitors in the power distribution device of the present application, and will not be repeated here.

[0132] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0133] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings 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 limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0134] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0135] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0136] In some of the processes described in the embodiments of the present application, there are multiple operations or steps that appear in a specific order. However, it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or may be executed in parallel. The serial numbers of the operations are only used to distinguish different operations, and the serial numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0137] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above and includes several instructions for causing a terminal device to execute the methods described in the various embodiments of the present application.

[0138] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A parameter matching method for resistors and capacitors in a power distribution device, characterized in that The parameter matching method for the resistor and capacitor in the power distribution device includes: Circulating to determine the matching theoretical time of the resistor and capacitor according to the resistance difference between the resistance value already executed in the previous state of the pre-charge resistor and the target resistance value, the capacitance difference between the capacitance value already executed in the previous state of the pre-charge capacitor and the target capacitance value, the resistance change ability per unit time, and the capacitance potential change ability per unit time in the power distribution device; According to the theoretical matching time, the resistance difference, and the capacitance difference, calculate the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time, and determine the conversion amount of the pre-charge current change according to the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time; Taking the preset pre-charge current change threshold as a limit, determine the current reduction coefficients of the resistor and capacitor according to the conversion amount of the pre-charge current change; According to the current reduction coefficients, the theoretical change amount of the resistor per unit time, and the theoretical change amount of the capacitor per unit time, determine the actual control amount of the resistor and the actual control amount of the capacitor respectively, and control the resistance value and the capacitance value respectively according to the actual control amount of the resistor and the actual control amount of the capacitor until the target resistance value and the target capacitance value are reached.

2. The parameter matching method of the resistor and capacitor in the power distribution device according to claim 1, characterized in that, The determining the matching theoretical time of the resistor and capacitor according to the resistance difference between the resistance value already executed in the previous state of the pre-charge resistor and the target resistance value, the capacitance difference between the capacitance value already executed in the previous state of the pre-charge capacitor and the target capacitance value, the resistance change ability per unit time, and the capacitance potential change ability per unit time in the power distribution device includes: Dividing the absolute value of the resistance difference by the resistance change ability per unit time to obtain the theoretical resistance change time; Dividing the absolute value of the capacitance difference by the capacitance change ability per unit time to obtain the theoretical capacitance change time; Taking the larger value of the theoretical resistance change time and the theoretical capacitance change time as the matching theoretical time.

3. The parameter matching method of the resistor and capacitor in the power distribution device according to claim 1, characterized in that, The calculating the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time according to the theoretical matching time, the resistance difference, and the capacitance difference includes: Dividing the resistance difference by the theoretical matching time to obtain the theoretical change amount of the resistor per unit time; Dividing the capacitance difference by the theoretical matching time to obtain the theoretical change amount of the capacitor per unit time.

4. The parameter matching method for resistors and capacitors in the power distribution device according to claim 1, characterized in that The calculating the conversion amount of the pre-charge current change according to the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time includes: Adding the first product obtained by multiplying the absolute value of the theoretical change amount of the resistor per unit time by the preset resistor conversion coefficient and the second product obtained by multiplying the absolute value of the theoretical change amount of the capacitor per unit time by the preset capacitor conversion coefficient to obtain the conversion amount of the pre-charge current change.

5. The parameter matching method of resistors and capacitors in the power distribution device according to claim 1, characterized in that The taking the preset pre-charge current change threshold as a limit and determining the current reduction coefficients of the resistor and capacitor according to the conversion amount of the pre-charge current change includes: Dividing the smaller value of the conversion amount of the pre-charge current change and the pre-charge current change threshold by the conversion amount of the pre-charge current change to obtain the current reduction coefficient.

6. The parameter matching method of the resistor and capacitor in the power distribution device according to claim 1, characterized in that, Based on the current reduction factor, the theoretical change amount of the resistor per unit time, and the theoretical change amount of the capacitor per unit time, respectively determine the actual control amount of the resistor and the actual control amount of the capacitor, and control the resistor value and the capacitor value according to the actual control amount of the resistor and the actual control amount of the capacitor until the target resistor value and the target capacitor value are reached, including: Multiply the theoretical change amount of the resistor per unit time by the current reduction factor to obtain the actual control amount of the resistor per unit time; Multiply the theoretical change amount of the capacitor per unit time by the current reduction factor to obtain the actual control amount of the capacitor per unit time; Multiply the actual control amount of the resistor per unit time by a preset cycle time interval to obtain the actual control amount of the resistor per cycle; Multiply the actual control amount of the capacitor per unit time by the cycle time interval to obtain the actual control amount of the capacitor per cycle; Control the resistor value of the corresponding pre-charge resistor according to the actual control amount of the resistor per cycle; Control the capacitor value of the corresponding pre-charge capacitor according to the actual control amount of the capacitor per cycle.

7. The parameter matching method of the resistor and capacitor in the power distribution device according to claim 6, characterized in that, The method further includes: Add the actual control amount of the resistor per cycle to the resistor value already executed in the previous state to obtain the resistor value already executed in the current state, and update the resistor value already executed in the previous state with the resistor value already executed in the current state; Add the actual control amount of the capacitor per cycle to the capacitor value already executed in the previous state to obtain the capacitor value already executed in the current state, and update the capacitor value already executed in the previous state with the capacitor value already executed in the current state.

8. A parameter matching device for resistors and capacitors in a power distribution device, characterized in that, The parameter matching device for resistors and capacitors in the power distribution device includes: A first determination module, which is used to cyclically determine the matching theoretical time of the resistor and the capacitor in the power distribution device according to the resistance difference between the resistor value already executed in the previous state of the power distribution device and the target resistor value, the capacitance difference between the capacitor value already executed in the previous state and the target capacitor value, the change ability of the resistor per unit time, and the change ability of the capacitor potential per unit time; A second determination module, which is used to calculate the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time according to the theoretical matching time, the resistance difference, and the capacitance difference, and determine the conversion amount of the pre-charge current change according to the theoretical change amount of the resistor per unit time and the theoretical change amount of the capacitor per unit time; A third determination module, which is used to use a preset pre-charge current change threshold as a limit to determine the current reduction factor of the resistor and the capacitor according to the conversion amount of the pre-charge current change; A control module, which is used to respectively determine the actual control amount of the resistor and the actual control amount of the capacitor according to the current reduction factor, the theoretical change amount of the resistor per unit time, and the theoretical change amount of the capacitor per unit time, and control the resistor value and the capacitor value according to the actual control amount of the resistor and the actual control amount of the capacitor until the target resistor value and the target capacitor value are reached.

9. A parameter matching device for resistors and capacitors in a power distribution device, characterized in that, The parameter matching device for resistors and capacitors in the power distribution device includes a processor, a memory, and a parameter matching program for resistors and capacitors in the power distribution device stored on the memory and executable by the processor. When the parameter matching program for resistors and capacitors in the power distribution device is executed by the processor, the steps of the parameter matching method for resistors and capacitors in the power distribution device as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that, A parameter matching program for resistors and capacitors in a power distribution device is stored on the computer-readable storage medium. When the parameter matching program for resistors and capacitors in the power distribution device is executed by a processor, the steps of the parameter matching method for resistors and capacitors in the power distribution device as described in any one of claims 1 to 7 are implemented.

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