Voltage equalization control circuit, voltage equalization control method, electronic device, and storage medium

Abstract

The embodiment of the application provides a voltage equalization control circuit, a voltage equalization control method, electronic equipment and a storage medium, and belongs to the technical field of power electronic power conversion. The method comprises the following steps: 2n capacitors are connected with a preset power supply; the 2n capacitors are connected in series; n is an integer greater than 1; 2n voltage equalization resistors are provided; each voltage equalization resistor is connected in parallel with a capacitor; a first totem pole is connected between the first midpoints of two adjacent voltage equalization resistors; a second totem pole is connected between the second midpoints of four adjacent voltage equalization resistors; the first totem pole and the second totem pole are the same; and the voltage equalization resistor, the first totem pole and the second totem pole are used for voltage equalization control of the capacitor. The embodiment of the application can realize voltage equalization control in the high-voltage multi-capacitor series connection scene, and reduce the overall device cost.

Description

Technical Field

[0001] This application relates to the field of power electronic power conversion technology, and in particular to a voltage equalization control circuit, voltage equalization control method, electronic device and storage medium. Background Technology

[0002] Existing voltage equalization control methods are divided into two types: active voltage equalization control and passive voltage equalization control. Active voltage equalization control uses MOSFETs and DSPs (Digital Signal Processors) for control and drive, but the overall component cost is relatively high. Passive voltage equalization control uses NPN and PNP transistors to form a totem pole to achieve voltage equalization. However, due to the insufficient voltage withstand capability of PNP transistors, passive voltage equalization control cannot be used in high-voltage multi-capacitor series scenarios. Summary of the Invention

[0003] The main objective of this application is to propose a voltage equalization control circuit, a voltage equalization control method, an electronic device, and a storage medium, which aims to achieve voltage equalization control in high-voltage multi-capacitor series scenarios and reduce the overall device cost.

[0004] To achieve the above objectives, a first aspect of this application provides a voltage equalization control circuit, the voltage equalization control circuit comprising: 2n capacitors, the 2n capacitors are connected to a preset power supply, the 2n capacitors are connected in series, and n is an integer greater than 1; There are 2n equalizing resistors, each of which is connected in parallel with a capacitor. The first midpoint of two adjacent equalizing resistors is connected to a first totem pole, and the second midpoint of four adjacent equalizing resistors is connected to a second totem pole. The first totem pole and the second totem pole are the same. The equalizing resistors, the first totem pole and the second totem pole are used to control the equalization of the capacitor.

[0005] In some embodiments, the first totem pole includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, and a second transistor. The first resistor is connected to the base of the first transistor, the second resistor is connected to the collector of the first transistor, the emitter of the first transistor is connected to the emitter of the second transistor, the base of the second transistor is connected to the third resistor, the first resistor is connected to the third resistor, the collector of the second transistor is connected to the fourth resistor, and the third resistor and the fourth resistor are connected together.

[0006] In some embodiments, the first transistor is an NPN transistor and the second transistor is a PNP transistor.

[0007] To achieve the above objectives, a second aspect of this application provides a voltage equalization control method, which is applied to the voltage equalization control circuit described in the first aspect, and the voltage equalization control method includes: According to the arrangement order of the capacitors in the voltage equalization control circuit, the terminal voltage of each two adjacent capacitors is obtained in sequence to obtain the first voltage and the second voltage; For each pair of adjacent capacitors, if the first voltage is greater than the second voltage or the first voltage is less than the second voltage, then the voltage equalization control circuit is used to equalize the first voltage to the second voltage.

[0008] In some embodiments, the first totem pole includes a second resistor, a fourth resistor, a first transistor, and a second transistor. The second resistor is connected to the collector of the first transistor, the emitter of the first transistor is connected to the emitter of the second transistor, and the collector of the second transistor is connected to the fourth resistor. If the first voltage is greater than the second voltage or less than the second voltage, voltage equalization control is performed through the voltage equalization control circuit to make the first voltage equal to the second voltage, including: If the first voltage is greater than the second voltage, the first transistor is turned on and the second transistor is turned off. The voltage equalization control is performed based on the equalizing resistor connected to the capacitor corresponding to the first voltage and the second resistor, so that the first voltage is equal to the second voltage.

[0009] In some embodiments, the step of performing voltage equalization control through the voltage equalization control circuit to make the first voltage equal to the second voltage if the first voltage is greater than the second voltage or less than the second voltage includes: If the first voltage is less than the second voltage, the second transistor is turned on and the first transistor is turned off. The voltage equalization control is performed based on the equalizing resistor connected to the capacitor corresponding to the second voltage and the fourth resistor, so that the first voltage is equal to the second voltage.

[0010] In some embodiments, the voltage equalization control circuit further includes a second totem pole, which includes a fifth resistor, a sixth resistor, a third transistor, and a fourth transistor. The fifth resistor is connected to the collector of the third transistor, the emitter of the third transistor is connected to the emitter of the fourth transistor, and the collector of the fourth transistor is connected to the sixth resistor. If the first voltage is greater than the second voltage or less than the second voltage, voltage equalization control is performed through the voltage equalization control circuit to make the first voltage equal to the second voltage, including: If the first voltage is greater than the second voltage, the third transistor is turned on and the fourth transistor is turned off. The voltage equalization control is performed based on the equalizing resistor connected to the capacitor corresponding to the first voltage and the fifth resistor, so that the first voltage is equal to the second voltage.

[0011] In some embodiments, the step of performing voltage equalization control through the voltage equalization control circuit to make the first voltage equal to the second voltage if the first voltage is greater than the second voltage or less than the second voltage includes: If the first voltage is less than the second voltage, the fourth transistor is turned on and the third transistor is turned off. The voltage equalization control is performed using the equalizing resistor connected to the capacitor corresponding to the second voltage and the sixth resistor, so that the first voltage is equal to the second voltage.

[0012] To achieve the above objectives, a third aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method described in the first aspect.

[0013] To achieve the above objectives, a fourth aspect of the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect.

[0014] The voltage equalization control circuit, voltage equalization control method, electronic device and storage medium proposed in the embodiments of this application introduce voltage equalization resistors, first totem poles and second totem poles connected to capacitors for voltage equalization control, which can realize voltage equalization control in high voltage multi-capacitor series scenarios and reduce the overall device cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the voltage equalization control circuit provided in the embodiments of this application; Figure 2 This is another schematic diagram of the voltage equalization control circuit provided in the embodiments of this application; Figure 3 This is a flowchart of the pressure equalization control method provided in the embodiments of this application; Figure 4 yes Figure 3 The flowchart for step 320 in the document; Figure 5 yes Figure 3 Another flowchart of step 320 in the process; Figure 6 yes Figure 3 Another flowchart of step 320 in the process; Figure 7 yes Figure 3 Another flowchart of step 320 in the process; Figure 8 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0017] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0019] Aluminum electrolytic capacitors play a crucial role in the field of power electronics due to their high capacitance-to-volume ratio (large capacity per unit volume) and relatively low cost, especially in applications requiring large-capacity energy storage and low-frequency filtering and smoothing. They are widely used in switching power supplies, UPS, frequency converters, solar inverters, motor controllers, and other fields.

[0020] In the field of high-voltage battery module testing equipment, traditional power frequency tower testers generally use high-voltage metallized polypropylene film capacitors as DC bus support to achieve large-capacity energy storage and low-frequency filtering. The maximum withstand voltage range of this type of capacitor can reach 2000-3000V. It can meet the withstand voltage range of the current high-voltage battery module testing equipment field without any series connection. It is only necessary to increase the capacity by using capacitors in parallel to meet the actual needs of the power converter.

[0021] Another approach is to use high-voltage aluminum electrolytic capacitors in series. The highest withstand voltage range of a single capacitor of this type can reach 550V-600V. The withstand voltage range of current high-voltage battery module testing equipment is often met by increasing the number of capacitors in series, or the capacity is increased by increasing the number of capacitors in parallel to meet the actual needs of power converters.

[0022] Although metallized polypropylene film capacitors have high withstand voltage, the actual dielectric strength of polypropylene film is in the range of 600-800V / μm, which makes the size of a single capacitor relatively large. This is not conducive to the modular design of power converters. They are generally suitable for the distributed design of traditional tower-type power frequency machines. When the machine fails, it may be necessary to disassemble and inspect the entire cabinet, making maintenance difficult.

[0023] Compared to polypropylene film capacitors, high-voltage aluminum electrolytic capacitors have lower withstand voltage and larger capacitance error. Considering the inherent capacitance error of capacitors and the capacitance drift that occurs over long-term use, if no voltage equalization treatment is performed when they are used in series, the voltage that the capacitors can withstand may exceed their own withstand voltage range, leading to device damage. There are two commonly used voltage equalization control methods: one is active voltage equalization control (MOS + DSP control drive), which requires more resources and has high device costs; the other is passive voltage equalization control (NPN transistor + PNP transistor totem pole), which requires relatively fewer resources and has lower costs. However, due to the voltage withstand limitation of PNP transistors (the highest withstand voltage of commonly used materials is 650V), when using passive transistor voltage balancing circuits in the field of high-voltage aluminum electrolytic capacitors (550V-600V), traditional control methods can generally only perform two sets of capacitors in series for balancing (with a maximum withstand voltage of about 1200V). Some connection methods support more than two sets of capacitors in series, but they cannot overcome the voltage withstand limitation of PNP transistors. Even after multiple sets are connected in series, the total voltage that the capacitors can withstand still cannot exceed 1200V, which cannot meet the needs of multi-capacitor series connection scenarios that require withstand voltages of 2000V and above.

[0024] Based on this, the embodiments of this application provide a voltage equalization control circuit, a voltage equalization control method, an electronic device, and a storage medium. When using multiple capacitors in series as DC bus capacitors in bidirectional DC high-voltage applications, by combining specific hardware material selection and matching parameters, no additional active control signal and voltage control loop are required to achieve voltage equalization control of multiple capacitors in series. This is suitable for high-voltage bidirectional power conversion applications, especially for scenarios involving multi-capacitor series equalization control in high-voltage equipment with voltage levels of 2000V and above. It can be applied to bidirectional power converters inside high-voltage battery module testing equipment and aging testing systems.

[0025] To achieve the above objectives, a first aspect of this application provides a voltage equalization control circuit. The voltage equalization control circuit includes 2n capacitors connected to a preset power supply, and the 2n capacitors are connected in series, where n is an integer greater than 1. The preset power supply is a high-voltage DC power supply, denoted as Vin. The positive terminal of the preset power supply is connected to the first capacitor, and the negative terminal is connected to the last capacitor. The negative terminal of the preset power supply is grounded. High-voltage aluminum electrolytic capacitors can be used. Figure 1As shown, n is 2, and the voltage equalization control circuit includes four capacitors: C1, C2, C3, and C4. Figure 2 As shown, n takes the value of 3, and the voltage equalization control circuit includes 6 capacitors: C1, C2, C3, C4, C5, and C6.

[0026] There are 2n voltage-equalizing resistors, each connected in parallel with a capacitor. For example... Figure 1 As shown, n is 2. The voltage equalization control circuit includes four voltage equalization resistors: R1, R2, R3, and R4. R1 is connected in parallel with C1, R2 in parallel with C2, R3 in parallel with C3, and R4 in parallel with C4. Figure 2 As shown, n takes the value of 3. The voltage equalization control circuit includes 6 voltage equalization resistors: R1, R2, R3, R4, R17 and R18. R1 is connected in parallel with C1, R2 is connected in parallel with C2, R3 is connected in parallel with C3, R4 is connected in parallel with C4, R17 is connected in parallel with C5, and R18 is connected in parallel with C6.

[0027] The first totem pole is connected to the first midpoint of two adjacent equalizing resistors. Figure 1 , Figure 2 Point P in the diagram is at the same potential, and the second midpoint of the four adjacent equalizing resistors is connected to the second totem pole. The second midpoint is... Figure 1 , Figure 2 Points M or N are at the same potential. The first and second totem poles are identical. The equalizing resistor, the first totem pole, and the second totem pole are used to control the voltage equalization of the capacitor.

[0028] In some embodiments, the first totem pole includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, and a second transistor. The first resistor is connected to the base of the first transistor, the second resistor is connected to the collector of the first transistor, the emitter of the first transistor is connected to the emitter of the second transistor, the base of the second transistor is connected to the third resistor, the first resistor is connected to the third resistor, the collector of the second transistor is connected to the fourth resistor, and the third resistor and the fourth resistor are connected together. The first transistor is an NPN transistor, and the second transistor is a PNP transistor.

[0029] Taking one of the first totem poles as an example, such as Figure 1 and Figure 2As shown, the first totem pole includes a first resistor R5, a second resistor R11, a third resistor R6, a fourth resistor R12, a first transistor Q1, and a second transistor Q2. The first resistor R5 is connected to the base of the first transistor Q1, the second resistor R11 is connected to the collector of the first transistor Q1, the emitter of the first transistor Q1 is connected to the emitter of the second transistor Q2, the base of the second transistor Q2 is connected to the third resistor R6, the first resistor R5 is connected to the third resistor R6, the collector of the second transistor Q2 is connected to the fourth resistor R12, and the third resistor R6 and the fourth resistor R12 are connected. The first transistor Q1 is an NPN transistor, and the second transistor Q2 is a PNP transistor.

[0030] The second totem pole includes a fifth resistor, a sixth resistor, a third transistor, and a fourth transistor. The fifth resistor is connected to the collector of the third transistor, the emitter of the third transistor is connected to the emitter of the fourth transistor, and the collector of the fourth transistor is connected to the sixth resistor.

[0031] Taking one of the second totem poles as an example, such as Figure 1 and Figure 2 As shown, the second totem pole includes a fifth resistor R15, a sixth resistor R16, a third transistor Q5, and a fourth transistor Q6. The fifth resistor R15 is connected to the collector of the third transistor Q5, the emitter of the third transistor Q5 is connected to the emitter of the fourth transistor Q6, and the collector of the fourth transistor Q6 is connected to the sixth resistor R16.

[0032] Through the voltage equalization control circuit, aluminum electrolytic capacitors can be applied to the field of high-voltage battery modules, occupying little PCB board space, facilitating modular design, and ensuring system stability and reliability.

[0033] Figure 1 This application provides a 2000V high-voltage multi-capacitor series voltage equalization control circuit, with an input voltage source Vin and other components as follows: (1) DC support bus capacitors C1, C2, C3, C4; the positive terminal of capacitor C1 is connected to the positive terminal of Vin, the negative terminal of capacitor C1 is connected to the positive terminal of capacitor C2, the negative terminal of capacitor C2 is connected to the positive terminal of capacitor C3, the negative terminal of capacitor C3 is connected to the positive terminal of capacitor C4, and the negative terminal of capacitor C4 is connected to the negative terminal of Vin. (2) Equalizing resistors R1, R2, R3, R4; R1 is connected in parallel with C1, R2 is connected in parallel with C2, R3 is connected in parallel with C3, and R4 is connected in parallel with C4. (3) Q1, Q2 and R5, R6, R11, R12 form the upper totem pole; point P is the midpoint of the upper totem pole equalization network, connected to the negative terminal of C1, the positive terminal of C2, the negative terminal of R1, the positive terminal of R2, the emitter of Q1 / Q2, the positive terminal of R9, and the positive terminal of R15. (4) Q3, Q4 and R7, R8, R13, R14 form the lower totem pole; point N is the midpoint of the lower totem pole equalization network, connected to the negative terminal of C3, the positive terminal of C4, the negative terminal of R3, the positive terminal of R4, the emitter of Q3 / Q4, the negative terminal of R10, and the negative terminal of R16. (5) Q5, Q6 and R9, R10, R15, R16 form the central totem pole; point M is the midpoint of the central totem pole equalization network, connected to the negative terminal of C2, the positive terminal of C3, the negative terminal of R2, the positive terminal of R3, the emitter of Q5 / Q6, the negative terminal of R6, the negative terminal of R12, the positive terminal of R7, and the positive terminal of R13; (6) Q1, Q3, and Q5 are NPN transistors, and Q2, Q4, and Q6 are PNP transistors.

[0034] The first totem pole can be either the top lane totem pole or the bottom lane totem pole, and the second totem pole can be the middle lane totem pole.

[0035] Figure 3 This is an optional flowchart of the pressure equalization control method provided in the embodiments of this application. Figure 3 The method may include, but is not limited to, steps S310 to S320.

[0036] Step S310: According to the arrangement order of the capacitors in the voltage equalization control circuit, the terminal voltage of each two adjacent capacitors is obtained in sequence to obtain the first voltage and the second voltage. Step S320: For each pair of adjacent capacitors, if the first voltage is greater than the second voltage or the first voltage is less than the second voltage, then the voltage equalization control circuit is used to equalize the first voltage to the second voltage.

[0037] In step S310 of some embodiments, the terminal voltages of every two adjacent capacitors are sequentially acquired according to their arrangement order in the voltage equalization control circuit to obtain a first voltage and a second voltage. Two adjacent capacitors include a first capacitor and a second capacitor, with the first capacitor preceding the second capacitor. The first voltage is the terminal voltage of the first capacitor, and the second voltage is the terminal voltage of the second capacitor. Figure 1 and Figure 2 As shown, the voltage across C1 is first obtained to get the first voltage, and the voltage across C2 is then obtained to get the second voltage.

[0038] In step S320 of some embodiments, for each pair of adjacent capacitors, if the first voltage is greater than the second voltage or the first voltage is less than the second voltage, voltage equalization control is performed through a voltage equalization control circuit to make the first voltage equal to the second voltage. It should be noted that voltage equalization control can be performed first through the first totem pole and then through the second totem pole.

[0039] like Figure 1 and Figure 2 As shown, when voltage imbalance occurs to C1 and C2 due to their own capacitance errors, R1 and R2 are used in parallel with C1 and C2, serving as the most basic static voltage equalization. After voltage equalization by the voltage-equalizing resistors, if unequal voltages across capacitors still exist, there are two cases: VC1>VC2 or VC1<VC2. VC1 is the terminal voltage of C1, and VC2 is the terminal voltage of C2.

[0040] As Figure 1 shown, the first-step voltage equalization control can be performed to make VC1≈VC2; after the completion of the first-step voltage equalization control, the second-step voltage equalization control is performed to make VC3≈VC4; after the completion of the second-step voltage equalization control, the third-step voltage equalization control is performed to make VC2≈VC3, and finally VC1≈VC2≈VC3≈VC4. VC3 is the terminal voltage of C3, and VC4 is the terminal voltage of C4.

[0041] Through the above steps S310 to S320, voltage equalization control in the scenario of high-voltage multi-capacitor series connection can be realized.

[0042] Refer to Figure 4 , in some embodiments, step S320 may include but is not limited to step S410: In step S410, if the first voltage is greater than the second voltage, the first triode is controlled to be turned on and the second triode is controlled to be turned off, and voltage equalization control is performed according to the voltage-equalizing resistor connected to the capacitor corresponding to the first voltage and the second resistor, so that the first voltage is equal to the second voltage.

[0043] In step S410 of some embodiments, as Figure 1 and Figure 2 shown, when VC1>VC2, the first triode Q1 is controlled to be turned on, and the second triode Q2 is controlled to be turned off, and voltage equalization control is performed according to the voltage-equalizing resistor R1 connected to the capacitor C1 corresponding to the first voltage and the second resistor R11, so that VC1 decreases until the first voltage is equal to the second voltage (VC1≈VC2).

[0044] When VC3>VC4, the first triode Q3 is controlled to be turned on, and the second triode Q4 is controlled to be turned off, and voltage equalization control is performed according to the voltage-equalizing resistor R3 connected to the capacitor C3 corresponding to the first voltage and the second resistor R13, so that VC3 decreases until the first voltage is equal to the second voltage (VC3≈VC4).

[0045] Through the above step S410, voltage equalization control can be performed on two adjacent capacitors.

[0046] Refer to Figure 5 , in some embodiments, step S320 may include but is not limited to step S510: In step S510, if the first voltage is less than the second voltage, controlling the second triode to conduct and the first triode to cut off, and performing voltage equalizing control according to the voltage equalizing resistor connected to the capacitor corresponding to the second voltage and a fourth resistor, so that the first voltage is equal to the second voltage.

[0047] In step S510 of some embodiments, as shown in Figure 1 and Figure 2 , when VC1 < VC2, controlling the second triode Q2 to conduct and the first triode Q1 to cut off, and performing voltage equalizing control according to the voltage equalizing resistor R2 connected to the capacitor C2 corresponding to the second voltage and the fourth resistor R12, so that VC2 drops until VC2 ≈ VC1.

[0048] When VC3 < VC4, controlling the second triode Q4 to conduct and the first triode Q3 to cut off, and performing voltage equalizing control according to the voltage equalizing resistor R4 connected to the capacitor C4 corresponding to the second voltage and the fourth resistor R14, so that VC4 drops until VC4 ≈ VC3.

[0049] Through the foregoing step S510, voltage equalizing control can be performed on two adjacent capacitors.

[0050] Please refer to Figure 6 , in some embodiments, step S320 may include, but is not limited to, step S610: In step S610, if the first voltage is greater than the second voltage, controlling the third triode to conduct and the fourth triode to cut off, and performing voltage equalizing control according to the voltage equalizing resistor connected to the capacitor corresponding to the first voltage and a fifth resistor, so that the first voltage is equal to the second voltage.

[0051] In step S610 of some embodiments, as shown in Figure 1 and Figure 2 , when VC2 > VC3, controlling the third triode Q5 to conduct and the fourth triode Q6 to cut off, and performing voltage equalizing control according to the voltage equalizing resistor R2 connected to the capacitor C2 corresponding to the first voltage and the fifth resistor R15, so that VC2 drops until VC2 ≈ VC3.

[0052] Through the foregoing step S610, voltage equalizing control can be performed on two adjacent capacitors.

[0053] Please refer to Figure 7 , in some embodiments, step S320 may include, but is not limited to, step S710: In step S710, if the first voltage is less than the second voltage, controlling the fourth triode to conduct and the third triode to cut off, and performing voltage equalizing control according to the voltage equalizing resistor connected to the capacitor corresponding to the second voltage and a sixth resistor, so that the first voltage is equal to the second voltage.

[0054] In step S710 of some embodiments, as Figure 1 and Figure 2 shown, when VC2<VC3, the fourth triode Q6 is controlled to be turned on, and the third triode Q5 is controlled to be turned off. Voltage equalization control is performed according to the voltage equalizing resistor R3 connected to the capacitor C3 corresponding to the second voltage and the sixth resistor R16, so that VC3 decreases until VC3≈VC2.

[0055] Through the above step S710, voltage equalization control can be performed on two adjacent capacitors.

[0056] Embodiments of the present application further provide an electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the foregoing voltage equalization control method is implemented. The electronic device may be any intelligent terminal including a tablet computer, a vehicle computer and the like.

[0057] Referring to Figure 8 , Figure 8 the hardware structure of an electronic device according to another embodiment is schematically illustrated, the electronic device includes: the processor 810, which may be implemented by a general purpose Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits, etc., and is configured to execute related programs to implement the technical solutions provided by the embodiments of the present application; the memory 820, which may be implemented in the form of Read Only Memory (ROM), static storage devices, dynamic storage devices, or Random Access Memory (RAM), etc. The memory 820 can store an operating system and other application programs. When the technical solution provided by the embodiments of the present specification is implemented by software or firmware, related program codes are stored in the memory 820, and called by the processor 810 to execute the voltage equalization control method of the embodiments of the present application; the input / output interface 830, configured to implement information input and output; the communication interface 840, configured to implement communication interaction between the device and other devices. Communication can be implemented through a wired manner (e.g., USB, network cable, etc.), or through a wireless manner (e.g., mobile network, WIFI, Bluetooth, etc.); the bus 850, configured to transmit information between various components of the device (such as the processor 810, the memory 820, the input / output interface 830, and the communication interface 840); The processor 810, memory 820, input / output interface 830 and communication interface 840 are connected to each other within the device via bus 850.

[0058] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described voltage equalization control method.

[0059] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0060] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0061] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0062] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0063] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0064] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0065] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0066] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0067] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0068] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0069] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0070] It should be noted that any AI models, software tools, or components not belonging to this company appearing in the embodiments of this application are merely illustrative examples and do not represent actual use. All user personal information involved in the embodiments of this application has been authorized (with the knowledge and consent) by the relevant parties or has been fully authorized by all parties, and the executing entity may obtain it through various legal and compliant means. The collection, storage, use, processing, transmission, provision, and disclosure of the information, data, and signals involved all comply with relevant laws and regulations and do not violate public order and good morals.

[0071] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A voltage equalization control circuit, characterized in that, The voltage equalization control circuit includes: 2n capacitors, the 2n capacitors are connected to a preset power supply, the 2n capacitors are connected in series, and n is an integer greater than 1; There are 2n equalizing resistors, each of which is connected in parallel with a capacitor. The first midpoint of two adjacent equalizing resistors is connected to a first totem pole, and the second midpoint of four adjacent equalizing resistors is connected to a second totem pole. The first totem pole and the second totem pole are the same. The equalizing resistors, the first totem pole and the second totem pole are used to control the equalization of the capacitor.

2. The voltage equalization control circuit according to claim 1, characterized in that, The first totem pole includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, and a second transistor. The first resistor is connected to the base of the first transistor, the second resistor is connected to the collector of the first transistor, the emitter of the first transistor is connected to the emitter of the second transistor, the base of the second transistor is connected to the third resistor, the first resistor is connected to the third resistor, the collector of the second transistor is connected to the fourth resistor, and the third resistor and the fourth resistor are connected together.

3. The voltage equalization control circuit according to claim 2, characterized in that, The first transistor is an NPN transistor, and the second transistor is a PNP transistor.

4. A pressure equalization control method, characterized in that, The voltage equalization control method is applied to the voltage equalization control circuit according to any one of claims 1 to 3, comprising: According to the arrangement order of the capacitors in the voltage equalization control circuit, the terminal voltage of each two adjacent capacitors is obtained in sequence to obtain the first voltage and the second voltage; For each pair of adjacent capacitors, if the first voltage is greater than the second voltage or the first voltage is less than the second voltage, then the voltage equalization control circuit is used to equalize the first voltage to the second voltage.

5. The method according to claim 4, characterized in that, The first totem pole includes a second resistor, a fourth resistor, a first transistor, and a second transistor. The second resistor is connected to the collector of the first transistor, the emitter of the first transistor is connected to the emitter of the second transistor, and the collector of the second transistor is connected to the fourth resistor. If the first voltage is greater than the second voltage or less than the second voltage, voltage equalization control is performed through the voltage equalization control circuit to make the first voltage equal to the second voltage, including: If the first voltage is greater than the second voltage, the first transistor is turned on and the second transistor is turned off. The voltage equalization control is performed based on the equalizing resistor connected to the capacitor corresponding to the first voltage and the second resistor, so that the first voltage is equal to the second voltage.

6. The method according to claim 5, characterized in that, The step of performing voltage equalization control through the voltage equalization control circuit to make the first voltage equal to the second voltage if the first voltage is greater than the second voltage or less than the second voltage includes: If the first voltage is less than the second voltage, the second transistor is turned on and the first transistor is turned off. The voltage equalization control is performed based on the equalizing resistor connected to the capacitor corresponding to the second voltage and the fourth resistor, so that the first voltage is equal to the second voltage.

7. The method according to claim 4, characterized in that, The voltage equalization control circuit further includes a second totem pole, which comprises a fifth resistor, a sixth resistor, a third transistor, and a fourth transistor. The fifth resistor is connected to the collector of the third transistor, the emitter of the third transistor is connected to the emitter of the fourth transistor, and the collector of the fourth transistor is connected to the sixth resistor. If the first voltage is greater than the second voltage or less than the second voltage, voltage equalization control is performed through the voltage equalization control circuit to make the first voltage equal to the second voltage, including: If the first voltage is greater than the second voltage, the third transistor is turned on and the fourth transistor is turned off. The voltage equalization control is performed based on the equalizing resistor connected to the capacitor corresponding to the first voltage and the fifth resistor, so that the first voltage is equal to the second voltage.

8. The method according to claim 7, characterized in that, The step of performing voltage equalization control through the voltage equalization control circuit to make the first voltage equal to the second voltage if the first voltage is greater than the second voltage or less than the second voltage includes: If the first voltage is less than the second voltage, the fourth transistor is turned on and the third transistor is turned off. The voltage equalization control is performed using the equalizing resistor connected to the capacitor corresponding to the second voltage and the sixth resistor, so that the first voltage is equal to the second voltage.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method according to any one of claims 4 to 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 4 to 8.

Images