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; the first end of the first switch module is connected with the first end of the first energy storage module; the first end of the second switch module is connected with the positive power supply end; the output module is connected with the second end of the first switch module; in the first stage, the first switch module and the second switch module are both switched off, and in the second stage, the first switch module and the second switch module are both switched on; or under the condition that N is greater than or equal to 2, in the first stage, the first switch module, the second switch module and the N-1 third switch modules are all switched off, and in the second stage, the first switch module, the second switch module and the N-1 third switch modules are all switched on. 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 ≥ 1, and N is an integer;

[0006] A first switch module, wherein a first end of the first switch module is connected to a first end of a first energy storage module;

[0007] A second switch module, wherein a first end of the second switch module is connected to a positive power supply end;

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

[0009] In the case of N=1, the second end of the second switch module is connected to the second end of the energy storage module;

[0010] Wherein, in the first stage, the first switch module and the second switch module are both turned off, and the energy storage module is charged; in the second stage, the first switch module and the second switch module are both turned on, and the energy storage module and the positive power supply terminal both supply power to the output module;

[0011] Alternatively, when N≥2, the second end of the second switch module is connected to the second end of the Nth energy storage module; the boost circuit further includes N-1 third switch modules, and the N energy storage modules are sequentially connected through the N-1 third switch modules;

[0012] Among them, in the first stage, the first switch module, the second switch module and N-1 third switch modules are all turned off, and the N energy storage modules are charged. In the second stage, the first switch module, the second switch module and N-1 third switch modules are all turned on, and the N energy storage modules and the positive power supply end supply power to the output module.

[0013] 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 fourth switch module;

[0014] The second ends of the N energy storage modules are each connected to the negative power supply end through a fifth switch module;

[0015] Among them, in the first stage, all the fourth switch modules and all the fifth switch modules are turned on, and the N energy storage modules are charged. In the second stage, all the fourth switch modules and all the fifth switch modules are turned off, and the N energy storage modules and the positive power supply end supply power to the output module.

[0016] In some optional implementations of the first aspect, the boost circuit further includes:

[0017] The boost circuit further includes a control module. When N=1, the control module is connected to both the first switch module and the second switch module. The control module is used to control both the first switch module and the second switch module to be turned off in the first stage, and is also used to control both the first switch module and the second switch module to be turned on in the second stage.

[0018] When N≥2, the control module is connected to the first switch module, the second switch module and N-1 third switch modules, and the control module is used to control the first switch module, the second switch module and the N-1 third switch modules to be cut off in the first stage, and to control the first switch module, the second switch module and the N-1 third switch modules to be turned on in the second stage.

[0019] In some optional implementations of the first aspect, the boost circuit further includes:

[0020] 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.

[0021] In some optional implementations of the first aspect, the boost circuit further includes:

[0022] 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;

[0023] The power supply module is connected between the inverting terminal of the comparison module and the negative power supply terminal.

[0024] In some optional implementations of the first aspect, the boost circuit further includes:

[0025] The clock module is connected to the control module and is used to provide a clock signal to the control module.

[0026] In some optional implementations of the first aspect, the comparison module includes a hysteresis comparator.

[0027] In some optional implementations of the first aspect, each of the N energy storage modules includes a first capacitor.

[0028] 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 first 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;

[0029] 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.

[0030] In some optional implementations of the first aspect, the energy storage submodule includes a second capacitor.

[0031] 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:

[0032] The boost circuit includes:

[0033] N energy storage modules, N ≥ 1, and N is an integer;

[0034] A first switch module, wherein a first end of the first switch module is connected to a first end of a first energy storage module;

[0035] A second switch module, wherein a first end of the second switch module is connected to a positive power supply end;

[0036] An output module connected to the second end of the first switch module;

[0037] In the case of N=1, the second end of the second switch module is connected to the second end of the energy storage module;

[0038] Methods include:

[0039] In the first stage, the first switch module and the second switch module are both controlled to be turned off, and the energy storage module is charged. In the second stage, the first switch module and the second switch module are both controlled to be turned on, and the energy storage module and the positive power supply terminal both supply power to the output module.

[0040] Alternatively, when N≥2, the second end of the second switch module is connected to the second end of the Nth energy storage module; the boost circuit further includes N-1 third switch modules, and the N energy storage modules are sequentially connected through the N-1 third switch modules;

[0041] Methods include:

[0042] In the first stage, the first switch module, the second switch module and N-1 third switch modules are all controlled to be turned off, and the N energy storage modules are charged. In the second stage, the first switch module, the second switch module and N-1 third switch modules are all controlled to be turned on, and the N energy storage modules and the positive power supply end supply power to the output module.

[0043] 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.

[0044] 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.

[0045] According to the boost circuit and control method thereof, the ideal diode circuit and the vehicle provided in the embodiment of the present application, N energy storage modules are arranged in the boost circuit, and when N=1, in the first stage, the first switch module and the second switch module are both turned off, so that one energy storage module can be charged, and in the second stage, the first switch module and the second switch module are both turned on, and the second switch module is connected to the positive power supply terminal, so that the energy storage module and the positive power supply terminal can both supply power to the output module; when N=2, in the first stage, the first switch module, the second switch module and the N-1 third switch modules are all turned off, so that the N energy storage modules can be charged, and in the second stage, the first switch module, the second switch module and the N-1 third switch modules are all turned on, so that the positive power supply terminal and the N energy storage modules can both supply power to the output module. That is, in the embodiment of the present application, the output module is supplied with power simultaneously by the positive power supply terminal and the N energy storage modules, so that 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

[0046] 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.

[0047] Figure 1 A schematic diagram showing a structure of a driving unit in an ideal diode circuit in the related art;

[0048] Figure 2A schematic diagram showing a structure of a boost circuit provided in an embodiment of the present application is shown;

[0049] Figure 3 Another structural schematic diagram of a boost circuit provided in an embodiment of the present application is shown;

[0050] Figure 4 Another structural schematic diagram of the boost circuit provided in the embodiment of the present application is shown;

[0051] Figure 5 Another structural schematic diagram of the boost circuit provided in the embodiment of the present application is shown;

[0052] Figure 6 Another structural schematic diagram of the boost circuit provided in the embodiment of the present application is shown;

[0053] Figure 7 Another structural schematic diagram of the boost circuit provided in the embodiment of the present application is shown;

[0054] Figure 8 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;

[0055] Fig. 9 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;

[0056] Fig.10 A schematic structural diagram of a voltage boost circuit in a comparative example is shown;

[0057] Fig.11 The number of boost cycles and the voltage value V of the second capacitor C2 in the comparative example are shown. 2 and (x+2)V ac The corresponding relationship between the percentage value and the number of low-voltage cycles and the voltage value V of the second capacitor C2 in the embodiment of the present application 2 and (x+2)V ac A comparison diagram of the corresponding relationship of the percentage values;

[0058] Fig.12 A schematic flow chart showing a control method for a voltage boost circuit provided in an embodiment of the present application;

[0059] Fig.13 A schematic diagram showing a structure of an ideal diode circuit provided in an embodiment of the present application is shown;

[0060] Fig.14 A schematic structural diagram of a vehicle provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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:

[0067] 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 composed of 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] The working principle of the drive unit is:

[0073] 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).

[0074] V ac =V anode -V cathode =V sd Formula (1)

[0075] 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.

[0076] 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 For example, V ref <V sd At this time, the voltage V p Satisfying formula (2), the inverting terminal voltage V n Satisfies formula (3).

[0077] V p =V anode Formula (2)

[0078] V n =V anode -V sd +V ref Formula (3)

[0079] 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.

[0080] 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.

[0081] 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.

[0082] The boost circuit 10 in the embodiment of the present application may be a low voltage charge pump in an ideal diode circuit. Figures 2 to 6 As shown, the embodiment of the present application provides a boost circuit 10, and the boost circuit 10 may include:

[0083] N energy storage modules 11, N ≥ 1, and N is an integer. The value of N can be set according to actual conditions and is not limited here. For example, the value of N can be 1, 2, 3, etc. It should be noted that the larger the value of N, the greater the voltage boost in the boost circuit 10.

[0084] 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 13 through the first capacitor C1 .

[0085] Optionally, the capacitances of the first capacitors C1 may be equal. Of course, in other embodiments of the present application, the capacitances of the first capacitors C1 may also be unequal.

[0086] The first switch module 12 has a first end connected to a first end of the first energy storage module 11 .

[0087] The first switch module 12, and the second to fifth switch modules hereinafter may include one of an N-type MOS transistor, a P-type MOS transistor, a PNP transistor and an NPN transistor.

[0088] As an example, when N=1, that is, the boost circuit 10 includes one first capacitor C1, as shown in FIG. Figure 4 As shown, the first switch module 12 includes a switch So1 , and a first end of the switch So1 is connected to a first electrode of the first capacitor C1 .

[0089] As another example, when N≥2, that is, the boost circuit 10 includes a plurality of first capacitors C1, as shown in FIG. Figure 5 and Figure 6As shown, the first switch module 12 includes a switch So1 , and a first end of the switch So1 is connected to a first electrode of a first capacitor C1 .

[0090] It is understandable that the first end of the energy storage module 11 may be the first electrode of the first capacitor C1 , and the second end of the energy storage module 11 may be the second electrode of the first capacitor.

[0091] The second switch module 14 has a first end connected to the positive power supply end Vac.

[0092] The positive power supply terminal Vac can provide the difference voltage V between the anode and cathode in the ideal diode circuit. ac .

[0093] As an example, Figure 4 As shown, the second switch module 14 includes a switch Sk, and the switch Sk is connected to the positive power source Vac.

[0094] As another example, Figure 5 As shown, the second switch module 14 includes a switch Sk, and the switch Sk is connected to the positive power source Vac through the Vp3 terminal.

[0095] As another example, Figure 6 As shown, the second switch module 14 includes a switch Sk, and the switch Sk is connected to the positive power source Vac through the Vp4 terminal.

[0096] The output module 13 is connected to the second end of the first switch module 12 .

[0097] like Figure 3 As shown, in the case of N=1, the second end of the second switch module 14 is connected to the second end of the energy storage module 11 .

[0098] In the first stage, the first switch module 12 and the second switch module 14 are both turned off, and the energy storage module 11 is charged. In the second stage, the first switch module 12 and the second switch module 14 are both turned on, and the energy storage module 11 and the positive power supply terminal both supply power to the output module 13.

[0099] The first stage may be a charging stage of the energy storage module 11 , and the second stage may be a stage in which the energy storage module 11 discharges to the output module 13 .

[0100] For example, Figure 4 As shown, the first switch module 12 includes a switch So1, the second switch module 14 includes a switch Sk, and the energy storage module 11 includes a first capacitor C1. The second end of the switch Sk is connected to the second electrode of the first capacitor C1. In the first stage, the switch So1 and the switch Sk are both turned off, and the first capacitor C1 is charged. In the second stage, the switch So1 and the switch Sk are both turned on, and the first capacitor C1 and the positive power supply terminal Vac both supply power to the output module 13.

[0101] Or, if Figure 2 As shown, in the case of N≥2, the second end of the second switch module 14 is connected to the second end of the Nth energy storage module 11; the boost circuit 10 further includes N-1 third switch modules 15, and the N energy storage modules 11 are sequentially connected through the N-1 third switch modules 15;

[0102] Among them, in the first stage, the first switch module 12, the second switch module 14 and N-1 third switch modules 15 are all turned off, and the N energy storage modules 11 are charged. In the second stage, the first switch module 12, the second switch module 14 and N-1 third switch modules 15 are all turned on, and the N energy storage modules 11 and the positive power supply terminal Vac supply power to the output module 13.

[0103] As an example, Figure 5 As shown, in the case of N=2, the first switch module 12 includes a switch So1, the second switch module 14 includes a switch Sk, and N-1 third switch modules 15 include a switch Sm1. For ease of description, the first first capacitor C1 is recorded as capacitor C11, and the second first capacitor C1 is recorded as capacitor C12. The first pole of capacitor C11 is connected to switch So1, the second pole of capacitor C11 is connected to the first end of switch Sm1, the second end of switch Sm1 is connected to the first pole of capacitor C12, and the second pole of capacitor C12 is connected to the second end of switch Sk.

[0104] In the first stage, the switch So1, the switch Sk and the switch Sm1 are all turned off, and the capacitors C11 and C12 are charged. In the second stage, the switch So1, the switch Sk and the switch Sm1 are all turned on, and the capacitors C11 and C12 and the positive power supply terminal Vac supply power to the output module 13.

[0105] As another example, Figure 6 As shown, in the case of N=3, the first switch module 12 includes a switch So1, the second switch module 14 includes a switch Sk, and N-1 third switch modules 15 include a switch Sm1 and a switch Sm2. For the convenience of description, the first first capacitor is recorded as capacitor C11, the second first capacitor is recorded as capacitor C12, and the third first capacitor is recorded as capacitor C13. The first pole of capacitor C11 is connected to switch So1, the second pole of capacitor C11 is connected to the first end of switch Sm1, the second end of switch Sm1 is connected to the first pole of capacitor C12, the second pole of capacitor C12 is connected to the first end of switch Sm2, the second end of switch Sm2 is connected to the first pole of capacitor C13, and the second pole of capacitor C13 is connected to the second end of switch Sk.

[0106] In the first stage, the switch So1, the switch Sk, the switch Sm1 and the switch Sm2 are all turned off, and the capacitors C11, C12 and C13 are charged. In the second stage, the switch So1, the switch Sk, the switch Sm1 and the switch Sm2 are all turned on, and the capacitors C11, C12, C13 and the positive power supply terminal Vac all supply power to the output module 13.

[0107] 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.

[0108] According to the boost circuit 10 provided in the embodiment of the present application, N energy storage modules 11 are arranged in the boost circuit 10. When N=1, in the first stage, the first switch module 12 and the second switch module 14 are both turned off, so that one energy storage module 11 can be charged, and in the second stage, the first switch module 12 and the second switch module 14 are both turned on, and the second switch module 14 is connected to the positive power supply terminal, so that the energy storage module 11 and the positive power supply terminal can both supply power to the output module 13; when N=2, in the first stage, the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 are all turned off, so that the N energy storage modules 11 can be charged, and in the second stage, the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 are all turned on, so that the positive power supply terminal and the N energy storage modules 11 can both supply power to the output module 13. That is to say, in the embodiment of the present application, the output module 13 is powered simultaneously by the positive power supply terminal and the N energy storage modules 11, thereby increasing the output voltage of the output module 13, that is, it is helpful to increase the voltage in the absence of continuous additional power supply.

[0109] In some optional embodiments, such as Figures 4 to 6 As shown, the first ends of the N energy storage modules 11 are each connected to the positive power supply end Vac through a fourth switch module 16;

[0110] The second ends of the N energy storage modules 11 are each connected to the negative power supply terminal Vc through a fifth switch module 17;

[0111] In the first stage, all fourth switch modules 16 and all fifth switch modules 17 are turned on, and the N energy storage modules 11 are charged. In the second stage, all fourth switch modules 16 and all fifth switch modules 17 are turned off, and the N energy storage modules 11 and the positive power supply terminal Vac supply power to the output module 13.

[0112] The negative power supply terminal Vc may be a cathode Vc in an ideal diode circuit.

[0113] As an example, in the case of N=1, Figure 4As shown, the fourth switch module 16 includes a switch Sp1, the fifth switch module 17 includes a switch Sn1, the energy storage module 11 includes a first capacitor C1, the first electrode of the first capacitor C1 is connected to the positive power supply terminal Vac through the switch Sp1, and the second electrode of the first capacitor C2 is connected to the negative power supply terminal Vc through the switch Sn1.

[0114] In the first stage, the switch Sp1 and the switch Sn1 are both turned on, and the first capacitor C1 is charged. In the second stage, the switch Sp1 and the switch Sn1 are both turned off, and the first capacitor C1 and the positive power supply terminal Vac both supply power to the output module 13 .

[0115] As another example, in the case of N=2, Figure 5 As shown, the fourth switch module 16 includes a switch Sp1 and a switch Sp2, the fifth switch module 17 includes a switch Sn1 and a switch Sn2, and the energy storage module 11 includes two first capacitors C1. For ease of description, the first first capacitor C1 is recorded as capacitor C11, and the second first capacitor C1 is recorded as capacitor C12. The first electrode of capacitor C11 is connected to the positive power supply terminal Vac through switch Sp1 and Vp1 terminal, and the second electrode of capacitor C11 is connected to the negative power supply terminal Vc through switch Sn1 and Vn1 terminal; the first electrode of capacitor C12 is connected to the positive power supply terminal Vac through switch Sp2 and Vp2 terminal, and the second electrode of capacitor C12 is connected to the negative power supply terminal Vc through switch Sn2 and Vn2 terminal.

[0116] In the first stage, the switch Sp1, the switch Sp2, the switch Sn1 and the switch Sn2 are all turned on, and the capacitors C11 and C12 are charged. In the second stage, the switch Sp1, the switch Sp2, the switch Sn1 and the switch Sn2 are all turned off, and the capacitors C11, C12 and the positive power supply terminal Vac all supply power to the output module 13.

[0117] As another example, in the case of N=3, Figure 6As shown, the fourth switch module 16 includes a switch Sp1, a switch Sp2 and a switch Sp3, the fifth switch module 17 includes a switch Sn1, a switch Sn2 and a switch Sn3, and the energy storage module 11 includes three first capacitors C1. For the convenience of description, the first first capacitor C1 is recorded as capacitor C11, the second first capacitor C1 is recorded as capacitor C12, and the third first capacitor C1 is recorded as capacitor C13. The first electrode of capacitor C11 is connected to the positive power supply terminal Vac through switch Sp1 and Vp1, and the second electrode of capacitor C11 is connected to the negative power supply terminal Vc through switch Sn1 and Vn1; the first electrode of capacitor C12 is connected to the positive power supply terminal Vac through switch Sp2 and Vp2, and the second electrode of capacitor C12 is connected to the negative power supply terminal Vc through switch Sn2 and Vn2; the first electrode of capacitor C13 is connected to the positive power supply terminal Vac through switch Sp3 and Vp3, and the second electrode of capacitor C13 is connected to the negative power supply terminal Vc through switch Sn3 and Vn3.

[0118] In the first stage, the switch Sp1, the switch Sp2, the switch Sp3, the switch Sn1, the switch Sn2 and the switch Sn3 are all turned on, and the capacitors C11, C12 and C13 are charged. In the second stage, the switch Sp1, the switch Sp2, the switch Sp3, the switch Sn1, the switch Sn2 and the switch Sn3 are all turned off, and the capacitors C11, C12, C13 and the positive power supply terminal Vac all supply power to the output module 13.

[0119] In some optional embodiments, such as Figure 7 As shown, the boost circuit 10 may further include a control module 18,

[0120] When N=1, the control module 18 is connected to both the first switch module 12 and the second switch module 14. The control module 18 is used to control both the first switch module 12 and the second switch module 14 to be turned off in the first stage, and to control both the first switch module 12 and the second switch module 14 to be turned on in the second stage.

[0121] For example, in the first stage, the control module 18 may output a non-enable signal to the first switch module 12 and the second switch module 14 to control both the first switch module 12 and the second switch module 14 to be turned off; in the second stage, the control module 18 may output an enable signal to the first switch module 12 and the second switch module 14 to control both the first switch module 12 and the second switch module 14 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.

[0122] When N≥2, the control module 18 is connected to the first switch module 12, the second switch module 14 and the N-1 third switch modules 15. The control module 18 is used to control the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 to be cut off in the first stage, and to control the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 to be turned on in the second stage.

[0123] Exemplarily, in the first stage, the control module 18 may output a non-enable signal to the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 to control the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 to be cut off; in the second stage, the control module 18 may output an enable signal to the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 to control the first switch module 12, the second switch module 14 and the N-1 third switch modules 15 to be turned on.

[0124] Optionally, the control module 18 may also be connected to all fourth switch modules 16 and all fifth switch modules 17. The control module 18 may also be used to control all fourth switch modules 16 and all fifth switch modules 17 to be turned on in the first stage, so that the N energy storage modules 11 are charged, and to control all fourth switch modules 16 and all fifth switch modules 17 to be turned off in the second stage, so that the N energy storage modules 11 supply power to the output module 13.

[0125] In some optional embodiments, such as Figure 7 As shown, the boost circuit 10 may further include:

[0126] The clock module 22 is connected to the control module 18, and the clock module 22 can be used to provide a clock signal to the control module 18. That is, the clock module 22 can be used as a timing reference for the control module 18 to output a control signal.

[0127] When receiving the clock signal, the control module 18 outputs the control signal alternately. The control signal may include an enable signal and a disable signal.

[0128] It is understood that the clock module 22 and the control module 18 may both be powered by a high voltage charge pump in an ideal diode circuit.

[0129] In some optional embodiments, such as Figure 7 As shown, the boost circuit 10 may further include:

[0130] Comparison module 19, the output end of comparison module 19 can be connected to control module 18, comparison module 19 can be used to control control module 18 to be in a non-working state when the voltage value of positive power supply terminal Vac is greater than or equal to the first threshold value, and can also be used to control control module 18 to be in a working state when the voltage value of 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 comparison module 19, 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), control control module 18 is in a working state, and then the voltage can be increased by using boost circuit 10.

[0131] When the control module 18 is in the working state, the control module 18 can output a non-enable signal and an enable signal. When the control module 18 is in the non-working state, the control module 18 has no output.

[0132] As an example, when the control module 18 is in working state and N=1, the control module 18 may output a disabling signal to both the first switch module 12 and the second switch module 14 , and the control module 18 may also output an enabling signal to both the first switch module 12 and the second switch module 14 .

[0133] As another example, when the control module 18 is in working state and N≥2, the control module 18 may output a disabling signal to the first switch module 12, the second switch module 14 and the third switch module 15, and the control module 18 may also output an enabling signal to the first switch module 12, the second switch module 14 and the third switch module 15.

[0134] The first threshold and the second threshold can be set according to actual conditions and are not limited here.

[0135] In some optional embodiments, such as Figure 7 As shown, the comparison module 19 may include a hysteresis comparator Comp. It is understandable that, when the comparison module 19 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.

[0136] In some optional embodiments, such as Figure 7 As shown, the boost circuit 10 may further include:

[0137] The voltage dividing module 20 is connected between the positive power supply terminal Vac and the negative power supply terminal Vc. The voltage dividing module 20 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 19 .

[0138] Exemplarily, the voltage division module 20 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 .

[0139] 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=500 ohms, or R1=200 ohms, R2=500 ohms, etc.

[0140] It is understandable that the voltage value connected to the in-phase terminal of the comparison module 19 can be flexibly controlled by setting the resistance values ​​of the first resistor R1 and the second resistor R2.

[0141] The power supply module 21 may be connected between the inverting terminal of the comparison module 19 and the negative power supply terminal Vc.

[0142] Optionally, the power supply module 21 may include a voltage source, and the voltage of the voltage source may be smaller than the conduction voltage of the ideal diode circuit.

[0143] 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.

[0144] In some optional embodiments, such as Figures 4 to 6 As shown, the output module 13 may include an energy storage submodule 131 and a switch submodule 132, wherein a first end of the switch submodule 132 is connected to a second end of the first switch module 12 and a first end of the energy storage submodule 131, and a second end of the energy storage submodule 131 is connected to a negative power supply terminal Vc;

[0145] In the first stage, the switch submodule 132 is turned on and the output module 14 outputs a voltage. In the second stage, the switch submodule 132 is turned off.

[0146] In some optional embodiments, such as Figures 4 to 6 As shown, the energy storage submodule 131 includes a second capacitor C2. The second capacitor C2 can be understood as an output capacitor.

[0147] For example, Figures 4 to 6 As shown, the energy storage submodule 131 includes a second capacitor C2, the switch submodule 131 includes a switch So2, the first end of the switch So2 is connected to the switch So1 and the first pole of the second capacitor C2, and the second pole of the second capacitor C2 is connected to the negative power supply terminal Vc. Among them, the first end of the energy storage submodule 131 can be the first pole of the second capacitor C2, and the second end of the energy storage submodule 131 can be the second pole of the second capacitor C2.

[0148] The capacitance of the second capacitor C2 is greater than the capacitance of the first capacitor C1.

[0149] 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.

[0150] The energy storage submodule 131 may be used to stabilize the voltage between the first switch module 12 and the energy storage submodule 131 .

[0151] Optionally, the control module 18 may also be connected to the switch submodule 132 to control the switch submodule 132 to be turned on in the first stage so that the output module 13 outputs a voltage, and to control the switch submodule 132 to be turned off in the second stage.

[0152] In order to better understand the present application, the boost circuit of the present application is illustrated below with reference to specific application scenarios.

[0153] like Figure 5 and Figure 8 As shown, Figure 8 A timing diagram of the first control signal and the second control signal output by the control module in the boost circuit is shown. The control signal output by the control module under the control of the clock module may include a first control signal clk1 and a second control signal clk2.

[0154] When N=1, the first control signal clk1 can be used to control the on or off of the fourth switch module, the fifth switch module and the switch submodule, and the second control signal clk2 can be used to control the on or off of the first switch module and the second switch module.

[0155] When N≥2, the first control signal clk1 can be used to control the on or off of the fourth switch module, the fifth switch module and the switch submodule, and the second control signal clk2 can be used to control the on or off of the first switch module, the second switch module and the third switch module.

[0156] Before the boost circuit 10 is started, the first fourth switch module 16, the first fifth switch module 17, the first switch module 12 and the switch submodule 132 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 13 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.

[0157] Optionally, in the first stage, the first control signal clk1 is a high level signal for a time length of t 1 .t 1 Satisfies formula (4).

[0158] t1 >3r 1 C 1 Formula (4)

[0159] Among them, r 1 represents the sum of the series resistances of one fourth switch module 16 and one fifth switch module 17 .

[0160] That is, t 1 Greater than three times the time constant of charging the first capacitor C1 provided by the positive power supply terminal Vac.

[0161] In the second stage, the second control signal clk2 is a high level signal for a time length of t 2 , t 2 Satisfies formula (5).

[0162]

[0163] r 2 represents the sum of the series resistances of all the third switch modules 15 and the second switch modules 14 .

[0164] That is, t 2 Greater than three times the time constant of charging the second capacitor C2 using three first capacitors C1 connected in series.

[0165] In the first stage, the first control signal clk1 output by the control module 18 is a high level signal, the second control signal clk2 is a low level signal, the fourth switch module 16, the fifth switch module 17 and the switch submodule 132 are all turned on, the first switch module 12, the second switch module 14 and the third switch module 15 are all turned off, and each first capacitor C1 is charged. The stabilized voltage value at both ends of each first capacitor C1 is V ac .

[0166] In the second stage, the first control signal clk1 output by the control module 18 is a high level signal, the second control signal clk2 is a low level signal, the fourth switch module 16, the fifth switch module 17 and the switch submodule 132 are all turned off, the first switch module 12, the second switch module 14 and the third switch module 15 are all turned on, and each first capacitor C1 and the positive power supply terminal Vac discharge to the second capacitor C2.

[0167] Before charging the second capacitor C2, the voltage value of the first node Vm1 between the first fourth switch module 16 and the first switch module 12 is V m11 , the voltage value of the second node Vm2 between the first switch module 12 and the switch submodule 132 is V m21 At this time, the voltage value of the first node Vm1 is V m11 Satisfies formula (6).

[0168] V m11 =(n+2)V ac Formula (6)

[0169] Wherein, n represents the number of energy storage modules 11 in the boost circuit 10. Figure 5 For example, n=3.

[0170] 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.

[0171]

[0172] Among them, C 1 represents the capacitance of the first capacitor C1, C 2 Represents the capacitance of the second capacitor C2, V 2 Represents the output voltage value of the second capacitor C2.

[0173] According to the capacitance correspondence relationship k×C between the first capacitor C1 and the second capacitor C2 1 =C 2 , formula (7) can be transformed into formula (8).

[0174]

[0175] After the first boost cycle, the voltage value of the first node Vm1 is V m12-1 . V m12-1 Satisfies formula (9).

[0176]

[0177] It can be seen that after the first boosting cycle, the voltage value of the first node Vm1 increases.

[0178] After the second boost cycle, the voltage value of the first node Vm1 is V m12-2 . V m12-2 Satisfies formula (10).

[0179]

[0180] After the mth boost cycle, the voltage value of the first node Vm1 is V m12-m . V m12-m Satisfies formula (11).

[0181] Wherein, m is a positive integer.

[0182]

[0183] Rearranging formula (11), we can obtain formula (12).

[0184]

[0185] When n approaches infinity, formula (13) is satisfied.

[0186]

[0187] That is to say, the maximum voltage across the second capacitor C1 is (n+2)V ac .

[0188] The voltage value of the second capacitor C2 is V 2 Reach (n+2)V ac The required period of x (x is the percentage) is m, and m is related to V m12-m Satisfies formula (14).

[0189] V m12-m =x(n+2)V ac Formula (14)

[0190] Substituting formula (12) into formula (14), we can obtain formula (15).

[0191]

[0192] It is understandable that formula (15) is a transcendental equation, which usually has no analytical solution, but an approximate solution can be obtained by computer.

[0193] Exemplarily, the parameter values ​​are set as follows:

[0194] V ac =30mV;

[0195] n+2=20;

[0196] C 1 =10nF;

[0197] C 2 =100nF;

[0198] k=10.

[0199] like Fig. 9 As shown, Fig. 9 The number of boost cycles and the voltage value V of the second capacitor C2 are shown. 2 and (x+2)V ac The corresponding relationship of the percentage value. Wherein, the horizontal axis represents the number of boost cycles, and the vertical axis represents the voltage value V of the second capacitor C2. 2 and (x+2)Vac percentage value.

[0200] The voltage value V of the second capacitor C2 2 The maximum voltage across the two terminals is (n+2)V. ac Taking the cycle required for 80% of the total cycle as an example, substituting the above parameter values ​​into formula (15)

[0201]

[0202] Solving the problem, we can get n to be 297, that is, under the above parameters, after 297 cycles, the voltage value V of the second capacitor C2 is 2 The maximum voltage across the terminals can reach (n+2)V ac 80%. With the reference voltage Vref as the reference voltage value V ref Taking 30mV as an example, after 297 voltage regulation cycles, the voltage value V output by the boost circuit 10 is 2 It 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 .

[0203] Fig.10 A boost circuit in the comparative example is shown. Please refer to Figure 5 and Fig.10 . Fig.10 and Figure 5 The difference is at least that: Fig.10 The boost circuit in the embodiment includes three first capacitors C1, and the second electrode of the last first capacitor C1 is connected to the negative power supply terminal Vc. Figure 5 The boost circuit includes two first capacitors C1, and the second electrode of the last first capacitor C1 is connected to the negative power supply terminal Vc through the fifth switch module, and is also connected to the positive power supply terminal Vac through the second switch module.

[0204] It is understandable that Fig.10 In the boost circuit, after the mth boost cycle, the voltage value V m12-m Satisfies formula (16).

[0205]

[0206] Wherein, n represents the number of energy storage modules 11 in the boost circuit; k represents the capacitance ratio of the second capacitor C2 to the first capacitor C1, V ac Represents the voltage provided by the positive power supply terminal Vac.

[0207] Subtracting formula (16) from formula (12) yields the voltage difference ΔV between the two boost circuits in the mth boost cycle: m12-m .

[0208] Voltage difference ΔV m12-m Satisfies formula (17).

[0209]

[0210] Obviously, ΔV m12-m >0, that is, the boost circuit provided in the embodiment of the present application reaches the same voltage value faster than the boost circuit in the comparative example.

[0211] Analyze ΔV m12-m The maximum value of , taking the partial derivative with respect to m, we get formula (18). Formula (18) is as follows:

[0212]

[0213] make Then we have formula (19). Formula (19) is as follows:

[0214]

[0215] After rearranging formula (19), we get formula (20) as follows:

[0216]

[0217] Exemplarily, the values ​​of the parameters are set as follows:

[0218] V ac =30mV;

[0219] n+2=20;

[0220] C 1 =10nF;

[0221] C 2 =100nF;

[0222] k=10.

[0223] According to the above parameters, the period of the maximum voltage difference is calculated to be m=195. m12-max The following formula (21) is satisfied.

[0224]

[0225] Fig.11 The number of boost cycles and the voltage value V of the second capacitor C2 in the comparative example are shown. 2 and (x+2)V ac The corresponding relationship between the percentage value and the number of low-voltage cycles and the voltage value V of the second capacitor C2 in the embodiment of the present application 2 and (x+2)V acThe corresponding percentage values ​​of Fig.11 As shown, where X represents the number of low-voltage cycles and the voltage value V of the second capacitor C2 in the embodiment of the present application. 2 and (x+2)V ac Y represents the corresponding relationship between the number of boost cycles and the voltage value V of the second capacitor C2 in the comparative example. 2 and (x+2)V ac The corresponding relationship of the percentage value; Z represents the difference between the boost percentage in the embodiment of the present application and the boost percentage in the comparative example. The ordinate on the left represents the voltage value V of the second capacitor C2 2 and (x+2)V ac The percentage value, the vertical axis on the right represents the difference between the boost percentage and the boost percentage in the comparative example, and the horizontal axis represents the number of boost cycles. It can be seen that in the same cycle, the boost circuit in the embodiment of the present application increases the voltage more than the boost circuit in the comparative example, that is, the voltage increased in the 195th cycle is the largest, which can be increased by about 1.79%.

[0226] The following introduces Figure 5 The boost circuit in Fig.10 Comparison of energy loss after the boost circuit reaches steady state.

[0227] The loss energy satisfies the following formula (22).

[0228] Loss energy = input energy - output capacitor energy formula (22)

[0229] exist Figure 5 The boost circuit and Fig.10 When the boost circuits in the embodiment have the same output capacitance (ie, the second capacitance C2), the difference in energy loss between the two is the difference in input energy.

[0230] In the embodiment of the present application, in the first cycle, the voltage of the first capacitor C1 and the second capacitor C2 before discharge is V ac , input energy E (new)in1 The following formula (23) is satisfied.

[0231]

[0232] In the second cycle, the input energy E (new)in2 The following formula (24) is satisfied.

[0233]

[0234] In the mth cycle, the input energy E (new)in(m) The following formula (25) is satisfied.

[0235]

[0236] The total input energy E for m cycles (new)in The following formula (26) is satisfied.

[0237]

[0238] Rearranging formula (26), we obtain the following formula (27).

[0239]

[0240] As m approaches infinity, the total input energy E (new)in(tot) Formula (28) can be satisfied.

[0241]

[0242] In the comparative example, in the first cycle, the voltages of the first capacitor C1 and the second capacitor C2 before discharge are V ac , input energy E (old)in1 The following formula (29) is satisfied.

[0243]

[0244] In the second cycle, the input energy E (old)in2 The following formula (30) is satisfied.

[0245]

[0246] In the mth cycle, the input energy E (old)in(m) The following formula (31) is satisfied.

[0247]

[0248] The total input energy E for m cycles (old)in The following formula (32) is satisfied.

[0249]

[0250] Rearranging formula (32), we obtain the following formula (33).

[0251]

[0252] As m approaches infinity, the total input energy E (old)in(tot) Formula (34) can be satisfied.

[0253]

[0254] Subtracting formula (28) from formula (34) yields that the excess energy ΔE in the comparative example compared with the embodiment of the present application satisfies formula (35).

[0255]

[0256]

[0257] Obviously, ΔE>0. Therefore, the boost circuit provided in the embodiment of the present application loses less energy than the boost circuit provided in the comparative example.

[0258] In summary, the boost circuit provided in the embodiment of the present application has a faster voltage boosting speed, less energy loss, and uses fewer components than the boost circuit provided in the comparative example.

[0259] Based on the same inventive concept, Fig.12 As shown, an embodiment of the present application provides a control method for a boost circuit, and the boost circuit may include:

[0260] N energy storage modules, N ≥ 1, and N is an integer;

[0261] A first switch module, wherein a first end of the first switch module is connected to a first end of a first energy storage module;

[0262] A second switch module, wherein a first end of the second switch module is connected to a positive power supply end;

[0263] An output module connected to the second end of the first switch module;

[0264] In the case of N=1, the second end of the second switch module is connected to the second end of the energy storage module;

[0265] The method may include S1210.

[0266] S1210. In the first stage, the first switch module and the second switch module are both turned off, and the energy storage module is charged. In the second stage, the first switch module and the second switch module are both turned on, and the energy storage module and the positive power supply terminal both supply power to the output module.

[0267] Alternatively, when N≥2, the second end of the second switch module is connected to the second end of the Nth energy storage module; the boost circuit further includes N-1 third switch modules, and the N energy storage modules are sequentially connected through the N-1 third switch modules;

[0268] The method may include S1210.

[0269] S1210. In the first stage, the first switch module, the second switch module and N-1 third switch modules are controlled to be turned off, and the N energy storage modules are charged. In the second stage, the first switch module, the second switch module and N-1 third switch modules are controlled to be turned on, and the N energy storage modules and the positive power supply end supply power to the output module.

[0270] According to the control method of the boost circuit provided in the embodiment of the present application, N energy storage modules are set in the boost circuit. When N=1, in the first stage, the first switch module and the second switch module are both turned off, so that one energy storage module can be charged, and in the second stage, the first switch module and the second switch module are both turned on, and the second switch module is connected to the positive power supply terminal, so that the energy storage module and the positive power supply terminal can both supply power to the output module; when N=2, in the first stage, the first switch module, the second switch module and N-1 third switch modules are all turned off, so that N energy storage modules can be charged, and in the second stage, the first switch module, the second switch module and N-1 third switch modules are all turned on, so that the positive power supply terminal and N energy storage modules can both supply power to the output module. That is, in the embodiment of the present application, the output module is supplied with power simultaneously by the positive power supply terminal and the N energy storage modules, so that the output voltage of the output module can be increased, that is, in the absence of continuous additional power supply, it is conducive to increasing the voltage.

[0271] 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.

[0272] Optionally, the first ends of the N energy storage modules are each connected to the positive power supply end through a fourth switch module;

[0273] The second ends of the N energy storage modules are each connected to the negative power supply end through a fifth switch module;

[0274] The method also includes:

[0275] In the first stage, all the fourth switch modules and all the fifth switch modules are controlled to be turned on, and the N energy storage modules are charged. In the second stage, all the fourth switch modules and all the fifth switch modules are controlled to be turned off, and the N energy storage modules and the positive power supply terminal supply power to the output module.

[0276] Optionally, the output module includes an energy storage submodule and a switch submodule, a first end of the switch submodule is connected to the second end of the first switch module and the first end of the energy storage submodule, and a second end of the energy storage submodule is connected to the negative power supply end;

[0277] The method further comprises:

[0278] 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.

[0279] 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.

[0280] Based on the same inventive concept, Fig.13As 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.

[0281] Based on the same inventive concept, Fig.14 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.

[0282] 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.

[0283] 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.

[0284] 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 ≥ 1, and N is an integer; A first switch module, wherein a first end of the first switch module is connected to a first end of the first energy storage module; A second switch module, wherein a first end of the second switch module is connected to a positive power supply end; An output module connected to the second end of the first switch module; In the case of N=1, the second end of the second switch module is connected to the second end of the energy storage module; Wherein, in the first stage, the first switch module and the second switch module are both turned off, and the energy storage module is charged; in the second stage, the first switch module and the second switch module are both turned on, and the energy storage module and the positive power supply terminal both supply power to the output module; Alternatively, when N≥2, the second end of the second switch module is connected to the second end of the Nth energy storage module; the boost circuit further includes N-1 third switch modules, and the N energy storage modules are sequentially connected through the N-1 third switch modules; In which, in the first stage, the first switch module, the second switch module and the N-1 third switch modules are all turned off, and the N energy storage modules are charged. In the second stage, the first switch module, the second switch module and the N-1 third switch modules are all turned on, and the N energy storage modules and the positive power supply end supply power to the output module.

2. 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 fourth switch module; The second ends of the N energy storage modules are each connected to the negative power supply end through a fifth switch module; In which, in the first stage, all the fourth switch modules and all the fifth switch modules are turned on, and the N energy storage modules are charged. In the second stage, all the fourth switch modules and all the fifth switch modules are turned off, and the N energy storage modules and the positive power supply end supply power to the output module.

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

4. The boost circuit according to claim 3, 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.

5. The boost circuit according to claim 4, 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.

6. The voltage boost circuit according to claim 3, 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.

7. The voltage boost circuit according to claim 4, characterized in that: The comparison module includes a hysteresis comparator.

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 first 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 ≥ 1, and N is an integer; A first switch module, wherein a first end of the first switch module is connected to a first end of the first energy storage module; A second switch module, wherein a first end of the second switch module is connected to a positive power supply end; An output module connected to the second end of the first switch module; In the case of N=1, the second end of the second switch module is connected to the second end of the energy storage module; The method comprises: In the first stage, the first switch module and the second switch module are controlled to be turned off, and the energy storage module is charged. In the second stage, the first switch module and the second switch module are controlled to be turned on, and the energy storage module and the positive power supply terminal both supply power to the output module. Alternatively, when N≥2, the second end of the second switch module is connected to the second end of the Nth energy storage module; the boost circuit further includes N-1 third switch modules, and the N energy storage modules are sequentially connected through the N-1 third switch modules; The method comprises: In the first stage, the first switch module, the second switch module and the N-1 third switch modules are all controlled to be turned off, and the N energy storage modules are charged. In the second stage, the first switch module, the second switch module and the N-1 third switch modules are all controlled to be turned on, and the N energy storage modules and the positive power supply end 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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