Boost circuit, ideal diode circuit and vehicle

Abstract

The invention discloses a booster circuit, an ideal diode circuit and a vehicle, and relates to the technical field of vehicles. The booster circuit comprises N energy storage modules, and N is an integer greater than or equal to 2; n-1 first switch modules, wherein the N energy storage modules are sequentially connected through the N-1 first switch modules; the first end of the second switch module is connected with the first end of the first energy storage module, and the second end of the Nth energy storage module is connected with the negative power supply end; the output module is connected with the second end of the second switch module; wherein in the first stage, the N-1 first switch module and the second switch module are both cut off, the N energy storage modules are charged, in the second stage, the N-1 first switch module and the second switch module are both conducted, and the N energy storage modules supply power to the output module. According to the embodiment of the invention, under the condition that no continuous extra power supply exists, the voltage can be improved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular relates to a boost circuit, an ideal diode circuit and a vehicle. Background Art

[0002] In some applications, it is necessary to boost a voltage of tens of millivolts by several times to dozens of times. For example, in an ideal diode circuit, when the anode and cathode of the ideal diode are connected to the power supply (i.e., powered on), the voltage difference between the anode and cathode is about 0.7 volts to 1.1 volts, but when the ideal diode is working normally, the voltage difference between the anode and cathode is only tens of millivolts. To maintain the normal operation of the ideal diode, it is necessary to boost the voltage of tens of millivolts by several times to dozens of times to supplement the energy required to drive the power module in the ideal diode circuit. Therefore, in the related art, there is a problem of how to increase the voltage without a continuous additional power supply. Summary of the invention

[0003] The embodiments of the present application provide a boost circuit, an ideal diode circuit and a vehicle, which can solve the problem of how to increase the voltage in the related art when there is no continuous additional power supply, and are helpful to increase the voltage when there is no continuous additional power supply.

[0004] In a first aspect, an embodiment of the present application provides a boost circuit, the boost circuit comprising:

[0005] N energy storage modules, N ≥ 2, and N is an integer;

[0006] N-1 first switch modules, N energy storage modules are connected in sequence through N-1 first switch modules;

[0007] A second switch module, wherein a first end of the second switch module is connected to a first end of the first energy storage module, and a second end of the Nth energy storage module is connected to a negative power supply end;

[0008] An output module connected to the second end of the second switch module;

[0009] In the first stage, N-1 first switch modules and second switch modules are turned off, and N energy storage modules are charged. In the second stage, N-1 first switch modules and second switch modules are turned on, and N energy storage modules supply power to the output module.

[0010] In some optional implementations of the first aspect, the boost circuit further includes:

[0011] The control module is connected to both the N-1 first switch modules and the second switch modules. The control module is used to control both the N-1 first switch modules and the second switch modules to be turned off in the first stage, and is also used to control both the N-1 first switch modules and the second switch modules to be turned on in the second stage.

[0012] In some optional implementations of the first aspect, the boost circuit further includes:

[0013] A comparison module, wherein the output end of the comparison module is connected to the control module, and the comparison module is used to control the control module to be in a non-working state when the voltage value at the positive power supply end is greater than or equal to a first threshold value, and is also used to control the control module to be in a working state when the voltage value at the positive power supply end is less than or equal to a second threshold value, and the first threshold value is less than the second threshold value.

[0014] In some optional implementations of the first aspect, the boost circuit further includes:

[0015] A voltage dividing module is connected between the positive power supply terminal and the negative power supply terminal, the voltage dividing module is provided with a voltage dividing node, and the voltage dividing node is connected to the in-phase terminal of the comparison module;

[0016] The power supply module is connected between the inverting terminal of the comparison module and the negative power supply terminal.

[0017] In some optional implementations of the first aspect, the boost circuit further includes:

[0018] The clock module is connected to the control module and is used to provide a clock signal to the control module.

[0019] In some optional implementations of the first aspect, the comparison module includes a hysteresis comparator.

[0020] In some optional implementations of the first aspect, the first ends of the N energy storage modules are each connected to the positive power supply end through a third switch module;

[0021] The second ends of the first to N-1th energy storage modules are respectively connected to the negative power supply end through a fourth switch module;

[0022] In the first stage, all third switch modules and all fourth switch modules are turned on, and N energy storage modules are charged. In the second stage, all third switch modules and all fourth switch modules are turned off, and N energy storage modules supply power to the output module.

[0023] In some optional implementations of the first aspect, each of the N energy storage modules includes a first capacitor.

[0024] In some optional embodiments of the first aspect, the output module includes an energy storage submodule and a switch submodule, a first end of the switch submodule is connected to a second end of the second switch module and a first end of the energy storage submodule, and a second end of the energy storage submodule is connected to a negative power supply terminal;

[0025] In the first stage, the switch submodule is turned on and the output module outputs voltage, and in the second stage, the switch submodule is turned off.

[0026] In some optional implementations of the first aspect, the energy storage submodule includes a second capacitor.

[0027] Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a control method for a boost circuit, the boost circuit comprising:

[0028] N energy storage modules, N ≥ 2, and N is an integer;

[0029] N-1 first switch modules, N energy storage modules are connected in sequence through N-1 first switch modules;

[0030] A second switch module, wherein a first end of the second switch module is connected to a first end of the first energy storage module, and a second end of the Nth energy storage module is connected to a negative power supply end;

[0031] An output module connected to the second end of the second switch module;

[0032] Methods include:

[0033] In the first stage, N-1 first switch modules and second switch modules are controlled to be turned off, and N energy storage modules are charged. In the second stage, N-1 first switch modules and second switch modules are controlled to be turned on, and N energy storage modules supply power to the output module.

[0034] Based on the same inventive concept, in a third aspect, an embodiment of the present application provides an ideal diode circuit, and the ideal diode circuit includes the boost circuit of the first aspect.

[0035] Based on the same inventive concept, in a fourth aspect, an embodiment of the present application provides a vehicle, the vehicle comprising the ideal diode circuit of the second aspect.

[0036] According to the boost circuit and control method thereof, the ideal diode circuit and the vehicle provided by the embodiment of the present application, N energy storage modules, N-1 first switch modules and second switch modules are arranged in the boost circuit, and then in the first stage, the N-1 first switch modules and the second switch modules are both turned off, so that the N energy storage modules can be charged, and in the second stage, the N-1 first switch modules and the second switch modules are both turned on, and the N energy storage modules can supply power to the output module. In other words, by supplying power to the output module simultaneously through the N energy storage modules, the output voltage of the output module can be increased, that is, in the absence of a continuous additional power supply, it is conducive to increasing the voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0038] Figure 1 A schematic diagram showing a structure of a driving unit in an ideal diode circuit in the related art;

[0039] Figure 2 A schematic diagram showing a structure of a boost circuit provided in an embodiment of the present application is shown;

[0040] Figure 3 Another structural schematic diagram of a boost circuit provided in an embodiment of the present application is shown;

[0041] Figure 4 Another structural schematic diagram of the boost circuit provided in the embodiment of the present application is shown;

[0042] Figure 5 Another structural schematic diagram of the boost circuit provided in the embodiment of the present application is shown;

[0043] Figure 6 Another structural schematic diagram of the boost circuit provided in the embodiment of the present application is shown;

[0044] Figure 7 A signal timing diagram showing a first control signal and a second control signal output by a control module in a boost circuit provided in an embodiment of the present application;

[0045] Figure 8 A schematic diagram showing the corresponding relationship between the number of boost cycles provided in an embodiment of the present application and the percentage value of the voltage value of the second voltage relative to the maximum voltage value;

[0046] Fig. 9 A schematic flow chart showing a control method for a voltage boost circuit provided in an embodiment of the present application;

[0047] Fig.10 A schematic diagram showing a structure of an ideal diode circuit provided in an embodiment of the present application is shown;

[0048] Fig.11 A schematic structural diagram of a vehicle provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0049] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0051] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0053] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0054] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0055] As described in the background technology, in an ideal diode circuit, when the anode and cathode of the ideal diode are connected to the power supply (i.e., powered on), the voltage difference between the anode and cathode is about 0.7 volts to 1.1 volts. At this time, the charge pump in the ideal diode circuit can work properly, increasing the driving voltage to more than 5 volts. Among them, the ideal diode circuit can be a circuit including a driving circuit and a power tube. The ideal diode circuit has the unidirectional conductivity of an ordinary diode, and can reduce the conduction voltage difference from hundreds of mV of an ordinary diode to tens of mV.

[0056] Figure 1 A schematic diagram showing a structure of a driving unit in an ideal diode circuit in the related art is shown. Figure 2 Another structural schematic diagram of a driving unit in an ideal diode circuit in the related art is shown. Figure 1 As shown, the driving unit a includes a transistor a1 and a driving module a2. The first end of the transistor a1 is connected to the first input end of the driving module a2 and the second output end of the driving module a2, the second end of the transistor a1 is connected to the second input end of the driving module a2 through a reference power supply Vref, the control end of the transistor a1 is connected to the first output end of the driving module a2, and the third input end of the driving module a2 is connected to the driving voltage end Vdr, which is used to provide a driving voltage value V dr The first end of the transistor a1 may be the anode (Anode) Va of the ideal diode circuit, and the second end of the transistor a2 may be the cathode (Cathode) Vc of the ideal diode circuit.

[0057] The transistor a1 may be an N-type MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) tube M1, the first end of the transistor a1 may be the source (S pole) of the N-type MOS tube, the second end of the transistor a2 may be the drain (D pole) of the N-type MOS tube, and the control end of the transistor a3 may be the gate (G pole) of the N-type MOS tube.

[0058] The driving module a2 may include an operational amplifier U1, which may be used as a driver for an N-type MOS tube. The first input terminal of the driving module a2 may be the in-phase terminal of the operational amplifier U1, the second input terminal may be the inverting input terminal, the third input terminal may be the anode Va, and the second output terminal may be the cathode Vb.

[0059] The reference power supply Vref can provide a reference voltage value of V ref The reference voltage, V ref It can be tens of millivolts. The specific voltage value can be set according to the actual situation and is not limited here. For example, V ref Equal to 30 millivolts, etc. Exemplarily, the positive electrode of the reference power supply Vref is connected to the inverting terminal of the operational amplifier U1, and the negative electrode is connected to the drain of the N-type MOS tube M1.

[0060] The working principle of the drive unit is:

[0061] At the moment of power supply connection (and power-on transient), the ideal diode circuit does not work, the N-type MOS tube M1 is turned off, and the body diode of the N-type MOS tube M1 is turned on, and its conduction voltage difference V ac Satisfies formula (1).

[0062] V ac =V anode -V cathode =V sd Formula (1)

[0063] Among them, V anode Represents the anode voltage of the ideal diode circuit, V cathode Represents the cathode voltage of the ideal diode circuit, V sd Represents the forward conduction voltage of the body diode of the N-type MOS tube M1, V sd Can be greater than 0.7 volts.

[0064] Driving voltage value V dr After stabilization, the operational amplifier U1 starts to work. The reference voltage value V provided by the reference power supply Vref ref Taking 30 millivolts as an example, V ref <V sd At this time, the voltage V p Satisfying formula (2), the inverting terminal voltage V n Satisfies formula (3).

[0065] V p =V anode Formula (2)

[0066] V n =V anode -V sd +V ref Formula (3)

[0067] Since V ref <V sd , therefore, V p Greater than V n , the output of operational amplifier U1 increases, and the gate voltage V ref Increase, the gate-source voltage difference V of N-type MOS tube M1 gs increases, causing the N-type MOS tube M1 to gradually turn on, and finally, the conduction voltage difference V ac Maintained at 30 mV (reference voltage V ref ), or, the gate-source voltage difference V gs Reaching the maximum value, the N-type MOS tube M1 is fully turned on.

[0068] It can be seen that when the ideal diode circuit works normally, its voltage difference is only tens of millivolts. To maintain the normal operation of the ideal diode, the voltage of tens of millivolts needs to be boosted several times to dozens of times to supplement the energy required to drive the power module in the ideal diode circuit. Therefore, in the related art, there is a problem of how to increase the voltage without a continuous additional power supply.

[0069] In order to solve the problem of how to increase the voltage in the absence of a continuous additional power supply in the related art, the embodiment of the present application provides a boost circuit, an ideal diode circuit and a vehicle. The boost circuit provided by the embodiment of the present application is first introduced below.

[0070] like Figure 2 As shown, the embodiment of the present application provides a boost circuit 10, and the boost circuit 10 may include:

[0071] There are N energy storage modules 11, N≥2, and N is an integer.

[0072] N-1 first switch modules 12 and N energy storage modules 11 can be sequentially connected through the N-1 first switch modules 12. In other words, two adjacent energy storage modules 11 are connected through one first switch module 12.

[0073] A second switch module 13, wherein a first end of the second switch module 13 can be connected to a first end of the first energy storage module 11, and a second end of the Nth energy storage module 11 is connected to a negative power supply terminal Vc;

[0074] The output module 14 is connected to the second end of the second switch module 13 .

[0075] The negative power supply terminal Vc may be a cathode Vc in an ideal diode circuit.

[0076] The boost circuit 10 in the embodiment of the present application may be a low-voltage charge pump in an ideal diode circuit.

[0077] In some optional implementations, each of the N energy storage modules 11 includes a first capacitor C1 , so that each energy storage module 11 can be charged or supply power to the output module 14 through the first capacitor C1 .

[0078] It is understandable that the capacitances of the first capacitors C1 are equal.

[0079] Exemplarily, each of the N-1 first switch modules 12 and the second switch module 13 may include one of an N-type MOS transistor, a P-type MOS transistor, a PNP transistor and an NPN transistor.

[0080] As an example, Figure 3As shown, in the case of N=2, for the convenience of explanation, the first energy storage module is recorded as 11a, the second energy storage module 11 is recorded as 11b, and the second switch module 13 is recorded as So1. The first end of the first energy storage module 11a is connected to the first end of the second switch module So1, the second end of the first energy storage module 11a is connected to the first end of the first switch module 12, the second end of the first switch module 12 is connected to the first end of the second energy storage module 11b, and the second end of the second energy storage module 11b is connected to the negative power supply terminal Vc.

[0081] As another example, Figure 4 As shown, in the case of N=3, for the convenience of explanation, the first energy storage module is recorded as 11a, the second energy storage module 11 is recorded as 11b, the third energy storage module 11 is recorded as 11c, the first first switch module 12 is recorded as Sm1, and the second first switch module 12 is recorded as Sm2. The first end of the first energy storage module 11a is connected to the first end of the second switch module So1, the second end of the first energy storage module 11a is connected to the first end of the first first switch module Sm1, the second end of the first first switch module Sm1 is connected to the first end of the second energy storage module 11b, the second end of the second energy storage module 11b is connected to the first end of the second first switch module Sm2, the second end of the second first switch module Sm2 is connected to the first end of the third energy storage module 11c, and the second end of the third energy storage module 11c is connected to the negative power supply terminal Vc.

[0082] As another example, Figure 5 As shown, when N=4, for the sake of convenience, the first energy storage module 11 is recorded as 11a, the second energy storage module 11 is recorded as 11b, the third energy storage module 11 is recorded as 11c, the fourth energy storage module 11 is recorded as 11d, the first first switch module 12 is recorded as Sm1, the second first switch module 12 is recorded as Sm2, and the third first switch module 12 is recorded as Sm3. The first end of the first energy storage module 11a is connected to the first end of the second switch module So1, the second end of the first energy storage module 11a is connected to the first end of the first first switch module Sm1, the second end of the first first switch module Sm1 is connected to the first end of the second energy storage module 11b, the second end of the second energy storage module 11b is connected to the first end of the second first switch module Sm2, the second end of the second first switch module Sm2 is connected to the first end of the third energy storage module 11c, the second end of the third energy storage module 11c is connected to the first end of the third first switch module Sm3, the second end of the third first switch module Sm3 is connected to the first end of the fourth energy storage module 11d, and the second end of the fourth energy storage module 11d is connected to the negative power supply terminal Vc.

[0083] It should be noted that the larger the value of N is, the greater the voltage boost in the boost circuit is.

[0084] The above-mentioned value of N is only used for example and is not used to limit the present application. In actual implementation, the value of N can be set according to the actual situation and is not limited here.

[0085] In the first stage, N−1 first switch modules 12 and second switch modules 13 are turned off, and N energy storage modules 11 are charged. In the second stage, N−1 first switch modules 12 and second switch modules 13 are turned on, and N energy storage modules 11 supply power to the output module 14 .

[0086] As an example, Figure 3 As shown, when N=2, in the first stage, the first switch module 12 and the second switch module So1 are both turned off, and the first energy storage module 11a and the second energy storage module 11b are both charged. In the second stage, the first switch module 12 and the second switch module So1 are both turned on, and the first energy storage module 11a and the second energy storage module 11b supply power to the output module 14.

[0087] As another example, Figure 4 As shown, when N=3, in the first stage, the first first switch module Sm1, the second first switch module Sm2, and the second switch module So1 are all turned on, and the first energy storage module 11a, the second energy storage module 11b, and the third energy storage module 11c are all charged. In the second stage, the first first switch module Sm1, the second first switch module Sm2, and the second switch module So1 are all turned off, and the first energy storage module 11a, the second energy storage module 11b, and the third energy storage module 11c supply power to the output module 14.

[0088] As another example, Figure 5As shown, when N=4, in the first stage, the first first switch module Sm1, the second first switch module Sm2, the third first switch module Sm3 and the second switch module So1 are all turned on, and the first energy storage module 11a, the second energy storage module 11b, the third energy storage module 11c and the fourth energy storage module 11d are all charged. In the second stage, the first first switch module Sm1, the second first switch module Sm2, the third first switch module Sm3 and the second switch module So1 are all turned off, and the first energy storage module 11a, the second energy storage module 11b, the third energy storage module 11c and the fourth energy storage module 11d all supply power to the output module 14. According to the boost circuit provided in the embodiment of the present application, N energy storage modules 11, N-1 first switch modules 12 and second switch modules 13 are arranged in the boost circuit 10, and then in the first stage, the N-1 first switch modules 12 and the second switch modules 13 are all turned off, so that the N energy storage modules 11 can be charged, and in the second stage, the N-1 first switch modules 12 and the second switch modules 13 are all turned on, and the N energy storage modules 11 can supply power to the output module 14. That is, by supplying power to the output module 14 through the N energy storage modules 11 at the same time, the output voltage of the output module 14 can be increased, that is, in the absence of a continuous additional power supply, it is conducive to increasing the voltage.

[0089] In some optional embodiments, such as Figure 6 As shown, the boost circuit 10 may further include:

[0090] The control module 15 can be connected to both the N-1 first switch modules 12 and the second switch modules 13. The control module 15 can be used to control both the N-1 first switch modules 12 and the second switch modules 13 to be turned off in the first stage, and also to control both the N-1 first switch modules 12 and the second switch modules 13 to be turned on in the second stage. In this way, by setting the control module 15, each switch module can be controlled to be turned on or off.

[0091] Exemplarily, the control module 15 may output a non-enable signal to N-1 first switch modules 12 and second switch modules 13 to control the N-1 first switch modules 12 and second switch modules 13 to be turned off; or may output an enable signal to the N-1 first switch modules 12 and second switch modules 13 to control the N-1 first switch modules 12 and second switch modules 13 to be turned on. The enable signal may be an enable level signal, and the non-enable signal may be a non-enable level signal.

[0092] In some optional embodiments, such as Figure 6 As shown, the boost circuit 10 may further include:

[0093] The clock module 19 is connected to the control module 15, and the clock module 19 can be used to provide a clock signal to the control module 15. That is, the clock module 19 can be used as a timing reference for the control module 15 to output a control signal.

[0094] When receiving the clock signal, the control module 15 outputs the control signal alternately. The control signal may include an enable signal and a disable signal.

[0095] It is understandable that the clock module 19 and the control module 15 may both be powered by a high voltage charge pump in an ideal diode circuit.

[0096] In some optional embodiments, such as Figure 6 As shown, the boost circuit 10 may further include:

[0097] The comparison module 16, the output end of the comparison module 16 can be connected to the control module 15, the comparison module 16 can be used to control the control module to be in a non-working state when the voltage value of the positive power supply terminal Vac is greater than or equal to the first threshold value, and can also be used to control the control module to be in a working state when the voltage value of the positive power supply terminal Vac is less than or equal to the second threshold value, and the first threshold value is less than the second threshold value. In this way, by setting the comparison module 16, it is possible to quickly and accurately confirm whether the high-voltage charge pump in the ideal diode circuit is abnormal, so that when the high-voltage charge pump is abnormal (that is, the voltage value of the positive power supply terminal Vac is less than or equal to the second threshold value), the control module is controlled to be in a working state, and then the voltage can be increased by using the boost circuit.

[0098] The positive power supply terminal Vac can provide the difference voltage V between the anode and cathode in the ideal diode circuit. ac .

[0099] In some optional embodiments, such as Figure 6 As shown, the comparison module 16 may include a hysteresis comparator Comp. It is understandable that, when the comparison module 16 includes the hysteresis comparator Comp, the problem of repeated triggering of a voltage value less than or equal to the second threshold value can be prevented from occurring.

[0100] In some optional embodiments, such as Figure 6 As shown, the boost circuit 10 may further include:

[0101] The voltage dividing module 17 is connected between the positive power supply terminal Vac and the negative power supply terminal Vc. The voltage dividing module 17 may be provided with a voltage dividing node, and the voltage dividing node may be connected to the non-inverting terminal of the comparison module 16 .

[0102] Exemplarily, the voltage division module 17 may include a first resistor R1 and a second resistor R2, the first resistor R1 and the second resistor R2 are connected in series, and the voltage division node is arranged between the first resistor R1 and the second resistor R2.

[0103] The resistance value of the first resistor R1 and the resistance value of the second resistor R2 can be set according to actual conditions and are not limited here. For example, R1 = R2 = 100 ohms, or R1 = 20 ohms, R2 = 50 ohms, etc.

[0104] It is understandable that the voltage value connected to the in-phase terminal of the comparison module 16 can be flexibly controlled by setting the resistance values ​​of the first resistor R1 and the second resistor R2.

[0105] The power supply module 18 may be connected between the inverting terminal of the comparison module 16 and the negative power supply terminal Vc.

[0106] Optionally, the power supply module 18 may include a voltage source, and the voltage of the voltage source may be smaller than the conduction voltage of the ideal diode circuit.

[0107] Exemplarily, the voltage value range of the voltage source may be [0.1, 0.3] volts, and the voltage value of the voltage source may be set according to actual conditions, for example, may be 0.1 volts and 0.2 volts.

[0108] In some optional embodiments, such as Figures 3 to 5 As shown, the first ends of the N energy storage modules 11 are each connected to the positive power supply end Vac through a third switch module 20;

[0109] The second ends of the first to N-1th energy storage modules 11 are each connected to the negative power supply terminal Vc through a fourth switch module 21;

[0110] In the first stage, all third switch modules 20 and all fourth switch modules 21 are turned on, and the N energy storage modules 11 are charged. In the second stage, all third switch modules 20 and all fourth switch modules 21 are turned off, and the N energy storage modules 11 supply power to the output module 14.

[0111] As an example, Figure 3 As shown, in the case of N=2, for the convenience of explanation, the first third switch module 20 is recorded as Sp1, the second third switch module 20 is recorded as Sp2, and the first fourth switch module 21 is recorded as Sn1. The first end of the first energy storage module 11a is connected to the positive power supply terminal Vac through the first third switch module Sp1 and the Vp1 terminal, and the second end of the first energy storage module 11a is connected to the negative power supply terminal Vc through the first fourth switch module Sn1 and the Vn1 terminal; the first end of the second energy storage module 11b is connected to the positive power supply terminal Vac through the second third switch module Sp2 and the Vp2 terminal, and the second end of the second energy storage module 11b is connected to the negative power supply terminal Vc through the Vn2 terminal.

[0112] As another example, Figure 4As shown, in the case of N=3, for the convenience of explanation, the first third switch module 20 is recorded as Sp1, the second third switch module 20 is recorded as Sp2, the third third switch module 20 is recorded as Sp3, the first fourth switch module 21 is recorded as Sn1, and the second fourth switch module 21 is recorded as Sn2. The first end of the first energy storage module 11a is connected to the positive power supply terminal Vac through the first third switch module Sp1 and the Vp1 end, and the second end of the first energy storage module 11a is connected to the negative power supply terminal Vc through the first fourth switch module Sn1 and the Vn1 end; the first end of the second energy storage module 11b is connected to the positive power supply terminal Vac through the second third switch module Sp2 and the Vp2 end, and the second end of the second energy storage module 11b is connected to the negative power supply terminal Vc through the second fourth switch module Sn2 and the Vn1 end; the first end of the third energy storage module 11c is connected to the positive power supply terminal Vac through the third third switch module Sp3 and the Vp3 end, and the second end of the third energy storage module 11c and the Vn3 end are connected to the negative power supply terminal Vc.

[0113] As another example, Figure 5 As shown, when N=4, for the sake of convenience, the first third switch module 20 is recorded as Sp1, the second third switch module 20 is recorded as Sp2, the third third switch module 20 is recorded as Sp3, the fourth third switch module 20 is recorded as Sp4, the first fourth switch module 21 is recorded as Sn1, the second fourth switch module 21 is recorded as Sn2, and the third fourth switch module 21 is recorded as Sn3. The first end of the first energy storage module 11a is connected to the positive power supply terminal Vac through the first third switch module Sp1 and Vp1, and the second end of the first energy storage module 11a is connected to the negative power supply terminal Vc through the first fourth switch module Sn1 and Vn1; the first end of the second energy storage module 11b is connected to the positive power supply terminal Vac through the second third switch module Sp2 and Vp2, and the second end of the second energy storage module 11b is connected to the negative power supply terminal Vc through the second fourth switch module Sn2 and Vn2; the first end of the third energy storage module 11c is connected to the positive power supply terminal Vac through the third third switch module Sp3 and Vp3, and the second end of the third energy storage module 11c is connected to the negative power supply terminal Vc through the third fourth switch module Sn3 and Vn3; the first end of the fourth energy storage module 11d is connected to the positive power supply terminal Vac through the fourth third switch module Sp4 and Vp4, and the second end of the fourth energy storage module 11d and Vn4 are connected to the negative power supply terminal Vc.

[0114] Optionally, the control module 15 may also be connected to all the third switch modules 20 and all the fourth switch modules 21. The control module 15 may also be used to control all the third switch modules 20 and all the fourth switch modules 21 to be turned on in the first stage, and the N energy storage modules 11 are charged. In the second stage, the control module 15 may control all the third switch modules 20 and all the fourth switch modules 21 to be turned off, and the N energy storage modules 11 supply power to the output module 14.

[0115] In some optional embodiments, such as Figures 3 to 5 As shown, the output module 14 may include an energy storage submodule 141 and a switch submodule 142, wherein a first end of the switch submodule 142 is connected to a second end of the second switch module 13 and a first end of the energy storage submodule 141, and a second end of the energy storage submodule 141 is connected to a negative power supply terminal Vc;

[0116] In the first stage, the switch submodule 142 is turned on and the output module 14 outputs a voltage. In the second stage, the switch submodule 142 is turned off.

[0117] For example, Figures 3 to 5 As shown, the switch submodule 142 may include a switch So2.

[0118] In some optional embodiments, such as Figures 3 to 5 As shown, the energy storage submodule 141 includes a second capacitor C2. The second capacitor C2 can be understood as an output capacitor. The capacitance of the second capacitor C2 is greater than the capacitance of the first capacitor C1.

[0119] For example, the capacitance of the second capacitor C2 may be k times the capacitance of the first capacitor C1 , where k is an integer greater than or equal to 2.

[0120] The energy storage submodule 141 may be used to stabilize the voltage between the second switch module 13 and the energy storage submodule 141 .

[0121] Optionally, the control module 15 may also be connected to the switch submodule 142 to control the switch submodule 142 to be turned on so that the output module 14 outputs a voltage in the first stage, and to control the switch submodule 142 to be turned off in the second stage.

[0122] In order to better understand the present application, the boost circuit of the present application is illustrated below with reference to specific application scenarios.

[0123] like Figure 5 and Figure 7 As shown, Figure 7A timing diagram of the first control signal and the second control signal output by the control module 15 in the boost circuit is shown. The control signal output by the control module 15 under the control of the clock module 17 may include a first control signal clk1 and a second control signal clk2. The first control signal clk1 can be used to control the conduction or cut-off of the third switch module 20, the fourth switch module 21 and the switch submodule 142, and the second control signal clk2 can be used to control the conduction or cut-off of the first switch module 12 and the second switch module 13.

[0124] Before the boost circuit 10 is started, the first third switch module 20, the first fourth switch module 21, the second switch module 13 and the switch submodule 142 are all turned on. At this time, the voltage across the first capacitor C1 and the voltage across the second capacitor C2 are equal, both of which are the voltage value V of the positive power supply terminal Vac. ac The output module 14 is connected to the input end of the high voltage charge pump in the ideal diode circuit. After the boost circuit 10 is started, its working process includes a first stage and a second stage. The first stage and the second stage of the boost circuit 10 are described in detail below.

[0125] Optionally, in the first stage, the duration of the first control signal clk1 being a high level signal is t1, and t1 satisfies formula (4).

[0126] t1>3r1C1 Formula (4)

[0127] Wherein, r1 represents the sum of the series resistances of one third switch module 20 and one fourth switch module 21 .

[0128] That is, t1 is greater than three times the time constant of charging the first capacitor C1 provided by the positive power supply terminal Vac.

[0129] In the second stage, the duration of the second control signal clk2 being a high level signal is t2, and t2 satisfies formula (5).

[0130]

[0131] r2 represents the sum of the series resistances of all the first switch modules 12 and one second switch module 13 .

[0132] That is, t2 is greater than three times the time constant of charging the second capacitor C2 by the three first capacitors C1 connected in series.

[0133] In the first stage, the first control signal clk1 output by the control module 15 is a high level signal, the second control signal clk2 is a low level signal, the third switch module 20, the fourth switch module 21 and the switch submodule 142 are all turned on, the first switch module 12 and the second switch module 13 are both turned off, and each first capacitor C1 is charged. The stabilized voltage value at both ends of each first capacitor C1 is V ac .

[0134] In the second stage, the first control signal clk1 output by the control module 15 is a high level signal, the second control signal clk2 is a low level signal, the third switch module 20, the fourth switch module 21 and the switch submodule 142 are all turned off, the first switch module 12 and the second switch module 13 are both turned on, and each first capacitor C1 discharges to the second capacitor C2.

[0135] Before charging the second capacitor C2, the voltage value of the first node Vm1 between the first third switch module 21 and the second switch module 13 is V m11 , the voltage value of the second node Vm2 between the second switch module 13 and the switch submodule 142 is V m21 At this time, the voltage value of the first node Vm1 is V m11 Satisfies formula (6).

[0136] V m11 =(x+2)V ac Formula (6)

[0137] Wherein, x represents the number of energy storage modules 11 in the boost circuit 10. Figure 5 For example, x=3.

[0138] After the second capacitor C2 is charged stably, the voltage value V m11 is equal to the voltage value V of the second node Vm2 m21 , and the voltage value of the second node Vm2 is V m21 Formula (7) is also satisfied.

[0139]

[0140] Wherein, C1 represents the capacitance of the first capacitor C1, C2 represents the capacitance of the second capacitor C2, and V2 represents the output voltage value of the second capacitor C2.

[0141] According to the capacitance correspondence relationship k×C1=C2 between the first capacitor C1 and the second capacitor C2, formula (7) can be converted into formula (8).

[0142]

[0143] After the first boost cycle, the voltage value of the first node Vm1 is V m12-1 . V m12-1 Satisfies formula (9).

[0144]

[0145] After the second boost cycle, the voltage value of the first node Vm1 is V m12-2 . V m12-2 Satisfies formula (10).

[0146]

[0147] After the nth boost cycle, the voltage value of the first node Vm1 is V m12-n . V m12-n Satisfies formula (11).

[0148] Wherein, n is a positive integer.

[0149]

[0150] When n approaches infinity, formula (12) is satisfied.

[0151]

[0152] That is to say, the maximum voltage across the second capacitor C1 is (x+2)V ac .

[0153] The voltage value V2 of the second capacitor C2 reaches (x+2)V ac The required period of m (m is the percentage) is n, then m and V m12-n The formula (13) is satisfied.

[0154] V m12-n =m(x+2)V ac Formula (13)

[0155] Substituting formula (11) into formula (13), we can obtain formula (14).

[0156]

[0157] It is understandable that formula (14) is a transcendental equation, which usually has no analytical solution, but an approximate solution can be obtained by computer.

[0158] Exemplarily, the values ​​of the parameters are set as follows:

[0159] V ac =30mV;

[0160] x+2=20;

[0161] C1=10nF;

[0162] C2=100nF;

[0163] k = 10;

[0164] Figure 8 The number of boost cycles and the voltage value V2 of the second capacitor C2 and (x+2)V ac The horizontal axis represents the number of boost cycles, and the vertical axis represents the voltage value V2 of the second capacitor C2 and (x+2)V ac percentage value.

[0165] The voltage value V2 of the second capacitor C2 reaches the maximum voltage of (x+2)V ac Taking the period required for 80% of the cycle as an example, substituting the above parameter values ​​into formula (15) can be obtained.

[0166]

[0167] The solution is that n is 313, that is, under the above parameters, after 313 cycles, the voltage value V2 of the second capacitor C2 can reach the maximum voltage across the two terminals (x+2)V ac 80%. With the reference voltage Vref as the reference voltage value V ref Taking 30mV as an example, after 313 voltage regulation cycles, the voltage value V2 output by the boost circuit 10 can reach 480mV, that is, 0.48V. At this time, the high-voltage charge pump in the ideal diode circuit can boost 0.48V to a driving voltage V dr .

[0168] Based on the same inventive concept, Fig. 9 As shown, an embodiment of the present application provides a control method for a boost circuit, and the boost circuit may include:

[0169] N energy storage modules, N ≥ 2, and N is an integer;

[0170] N-1 first switch modules, N energy storage modules are connected in sequence through N-1 first switch modules;

[0171] A second switch module, wherein a first end of the second switch module is connected to a first end of the first energy storage module, and a second end of the Nth energy storage module is connected to a negative power supply end;

[0172] An output module connected to the second end of the second switch module;

[0173] Methods may include:

[0174] S910. In the first stage, N-1 first switch modules and second switch modules are controlled to be turned off, and N energy storage modules are charged. In the second stage, N-1 first switch modules and second switch modules are controlled to be turned on, and N energy storage modules supply power to the output module.

[0175] According to the control method of the boost circuit provided in the embodiment of the present application, N energy storage modules, N-1 first switch modules and second switch modules are set in the boost circuit, and then in the first stage, by controlling the N-1 first switch modules and the second switch modules to be turned off, the N energy storage modules can be charged, and in the second stage, when the N-1 first switch modules and the second switch modules are controlled to be turned on, the N energy storage modules can supply power to the output module. In other words, by supplying power to the output module simultaneously through the N energy storage modules, the output voltage of the output module can be increased, that is, in the absence of a continuous additional power supply, it is conducive to increasing the voltage.

[0176] The control method of the boost circuit provided in the embodiment of the present application can be applied to a control device of the boost circuit or a control module in the boost circuit, etc.

[0177] Optionally, the first ends of the N energy storage modules are each connected to the positive power supply end through a third switch module; the second ends of the first to N-1th energy storage modules are each connected to the negative power supply end through a fourth switch module;

[0178] The method also includes:

[0179] In the first stage, all third switch modules and all fourth switch modules are controlled to be turned on, and N energy storage modules are charged. In the second stage, all fourth switch modules and the fourth switch module are controlled to be turned off, and N energy storage modules supply power to the output module.

[0180] Optionally, the output module includes an energy storage submodule and a switch submodule, a first end of the switch submodule is connected to a second end of the second switch module and a first end of the energy storage submodule, and a second end of the energy storage submodule is connected to a negative power supply end;

[0181] The method further comprises:

[0182] In the first stage, the switch submodule is controlled to be turned on and the output module outputs a voltage. In the second stage, the switch submodule is controlled to be turned off.

[0183] The control method of the boost circuit provided in the embodiment of the present application has the same or similar beneficial effects as the boost circuit in the above-mentioned embodiment, which will not be described in detail here.

[0184] Based on the same inventive concept, Fig.10As shown, the embodiment of the present application provides an ideal diode circuit 100, and the ideal diode circuit 100 includes the boost circuit 10 in the above embodiment. The ideal diode circuit 100 has the same or similar beneficial effects as the boost circuit in the above embodiment, which will not be described in detail.

[0185] Based on the same inventive concept, Fig.11 As shown, the embodiment of the present application provides a vehicle 1000, and the vehicle 1000 includes the ideal diode circuit 100 in the above embodiment. The vehicle has the same or similar beneficial effects as the ideal diode circuit in the above embodiment, which will not be described in detail.

[0186] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0187] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0188] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the methods and core ideas of this application. The above are only optional implementation methods of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concepts and technical solutions of this application to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A boost circuit, characterized in that: include: N energy storage modules, N ≥ 2, and N is an integer; N-1 first switch modules, the N energy storage modules are connected in sequence through the N-1 first switch modules; A second switch module, wherein a first end of the second switch module is connected to a first end of the first energy storage module, and a second end of the Nth energy storage module is connected to a negative power supply end; An output module connected to the second end of the second switch module; In the first stage, the N-1 first switch modules and the second switch modules are turned off, and the N energy storage modules are charged. In the second stage, the N-1 first switch modules and the second switch modules are turned on, and the N energy storage modules supply power to the output module.

2. The boost circuit according to claim 1, characterized in that: The boost circuit further includes: A control module is connected to the N-1 first switch modules and the second switch modules. The control module is used to control the N-1 first switch modules and the second switch modules to be turned off in the first stage, and is also used to control the N-1 first switch modules and the second switch modules to be turned on in the second stage.

3. The boost circuit according to claim 2, characterized in that: The boost circuit further includes: A comparison module, wherein the output end of the comparison module is connected to the control module, and the comparison module is used to control the control module to be in a non-working state when the voltage value of the positive power supply end is greater than or equal to a first threshold value, and is also used to control the control module to be in a working state when the voltage value of the positive power supply end is less than or equal to a second threshold value, and the first threshold value is less than the second threshold value.

4. The boost circuit according to claim 3, characterized in that: The boost circuit further includes: A voltage dividing module, connected between the positive power supply terminal and the negative power supply terminal, the voltage dividing module is provided with a voltage dividing node, and the voltage dividing node is connected to the in-phase terminal of the comparison module; The power supply module is connected between the inverting terminal of the comparison module and the negative power supply terminal.

5. The boost circuit according to claim 2, characterized in that: The boost circuit further includes: A clock module is connected to the control module, and is used to provide a clock signal to the control module.

6. The voltage boost circuit according to claim 3, characterized in that: The comparison module includes a hysteresis comparator.

7. The boost circuit according to claim 1, characterized in that: The first ends of the N energy storage modules are each connected to the positive power supply end through a third switch module; The second ends of the first to N-1th energy storage modules are each connected to the negative power supply end through a fourth switch module; In the first stage, all the third switch modules and all the fourth switch modules are turned on, and the N energy storage modules are charged. In the second stage, all the third switch modules and all the fourth switch modules are turned off, and the N energy storage modules supply power to the output module.

8. The boost circuit according to any one of claims 1 to 7, characterized in that: Each of the N energy storage modules includes a first capacitor.

9. The boost circuit according to claim 1, characterized in that: The output module comprises an energy storage submodule and a switch submodule, wherein a first end of the switch submodule is connected to a second end of the second switch module and a first end of the energy storage submodule, and a second end of the energy storage submodule is connected to a negative power supply end; In the first stage, the switch submodule is turned on and the output module outputs a voltage, and in the second stage, the switch submodule is turned off.

10. The boost circuit according to claim 9, characterized in that: The energy storage submodule includes a second capacitor.

11. A control method for a boost circuit, characterized in that: The boost circuit comprises: N energy storage modules, N ≥ 2, and N is an integer; N-1 first switch modules, the N energy storage modules are connected in sequence through the N-1 first switch modules; A second switch module, wherein a first end of the second switch module is connected to a first end of the first energy storage module, and a second end of the Nth energy storage module is connected to a negative power supply end; An output module connected to the second end of the second switch module; The method comprises: In the first stage, the N-1 first switch modules and the second switch modules are controlled to be turned off, and the N energy storage modules are charged. In the second stage, the N-1 first switch modules and the second switch modules are controlled to be turned on, and the N energy storage modules supply power to the output module.

12. An ideal diode circuit, characterized in that: include: The boost circuit according to any one of claims 1 to 10.

13. A vehicle, characterized in that: Comprising the ideal diode circuit as claimed in claim 12.

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