A power control circuit, integrated circuit, power module and electronic equipment

Abstract

The present application provides a power control circuit, an integrated circuit, a power module and an electronic device, wherein the power control circuit is applied to a power supply having at least two battery packs. The power control circuit includes: a signal control circuit, a voltage acquisition circuit and a boost circuit; wherein the signal control circuit is used to output a corresponding level signal according to the acquired power control signal to control at least two battery packs to be connected in series and / or in parallel, and the power control signal includes a series control signal and / or a parallel control signal; the voltage acquisition circuit is used to obtain the voltage of the power supply; the boost circuit is used to boost the input voltage according to the voltage of the power supply, and output the boosted voltage. The present application can realize the control or switching of at least two battery packs in the power supply in series or in parallel according to actual needs, thereby effectively improving the flexibility of the power supply.

Description

[Technical field]

[0001] The present application relates to the field of power control technology, and in particular to a power control circuit, an integrated circuit, a power module and an electronic device. [Background technology]

[0002] In the related art, the most common application form of power supply is a battery pack; wherein the battery pack includes multiple batteries. Battery packs can be divided into three types according to the different connection methods of the multiple batteries inside them; wherein, the first type is a series-type battery pack, which includes multiple batteries connected in series, and is suitable for occasions requiring a higher voltage; the second type is a parallel-type battery pack, which includes multiple batteries connected in parallel, and is suitable for occasions requiring a higher battery capacity and a larger current; the third type is a series-parallel hybrid battery pack, which includes at least two sub-battery packs connected in parallel, each of which includes multiple batteries connected in series, and is suitable for occasions requiring segmented working voltage and working current. For a power supply composed of a series-parallel hybrid battery pack, its corresponding control circuit cannot convert at least two sub-battery packs into series and parallel according to actual needs, resulting in poor flexibility of the power supply.

[0003] Therefore, it is necessary to improve the structure of the control circuit of the power supply composed of the above-mentioned series-parallel hybrid battery pack. [Summary of the invention]

[0004] The present application provides a power control circuit, an integrated circuit, a power module and an electronic device, aiming to solve the problem of poor flexibility of the power supply in the related art.

[0005] In order to solve the above technical problems, a first aspect of an embodiment of the present application provides a power supply control circuit, which is applied to a power supply having at least two battery packs, including: a signal control circuit, a voltage acquisition circuit and a boost circuit;

[0006] The signal control circuit is used to output a corresponding level signal according to the acquired power control signal to control at least two battery packs to be connected in series and / or in parallel; wherein the power control signal includes a series control signal and / or a parallel control signal;

[0007] The voltage acquisition circuit is used to obtain the voltage of the power supply;

[0008] The boost circuit is used to boost the input voltage according to the voltage of the power supply and output the boosted voltage.

[0009] A second aspect of the embodiments of the present application provides an integrated circuit, comprising the power control circuit as described in the first aspect of the embodiments of the present application.

[0010] A third aspect of the embodiments of the present application provides a power supply module, comprising: a power supply having at least two battery packs and a power supply control circuit as described in the first aspect of the embodiments of the present application.

[0011] A fourth aspect of the embodiments of the present application provides an electronic device, comprising the power module as described in the third aspect of the embodiments of the present application.

[0012] From the above description, it can be seen that compared with the related art, the beneficial effects of the present application are:

[0013] First, the signal control circuit outputs a corresponding level signal according to the acquired power control signal to control at least two battery packs in the power supply to be connected in series and / or in parallel; then the voltage of the power supply is acquired through the voltage acquisition circuit; finally, the input voltage is boosted according to the voltage of the power supply through the boost circuit, and the boosted voltage is output for power supply. In this process, the power control signal acquired by the signal control circuit can be input by the user according to actual needs, so that the at least two battery packs in the power supply can be controlled or switched in series or in parallel according to actual needs, thereby effectively improving the flexibility of the power supply.

Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the related technologies or the embodiments of the present application, the drawings required for use in the description of the related technologies or the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, not all embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A module block diagram of a first power control circuit provided in an embodiment of the present application;

[0016] Figure 2 A module block diagram of a second power control circuit provided in an embodiment of the present application;

[0017] Figure 3 A module block diagram of a third power control circuit provided in an embodiment of the present application;

[0018] Figure 4 A module block diagram of a fourth power control circuit provided in an embodiment of the present application;

[0019] Figure 5 A schematic diagram of the circuit structure of a fifth power supply control circuit provided in an embodiment of the present application;

[0020] Figure 6 A timing diagram of a fifth power control circuit provided in an embodiment of the present application;

[0021] Figure 7 A control flow diagram of a fifth power control circuit provided in an embodiment of the present application. [Specific implementation method]

[0022] In order to make the purpose, technical solutions and advantages of the present application more obvious and easy to understand, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the various embodiments of the present application described below are only used to explain the present application and are not used to limit the present application, that is, based on the various embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] In the related art, for a power supply composed of a series-parallel hybrid battery pack, its corresponding control circuit cannot convert at least two sub-battery packs inside the power supply into series and parallel according to actual needs, resulting in poor flexibility of the power supply. To this end, an embodiment of the present application provides a power supply control circuit, which is applied to a power supply having at least two battery packs; wherein each battery pack includes a plurality of batteries connected in series. In the following, the above-mentioned power supply having at least two battery packs will be represented by the number 400.

[0024] See also Figure 1 , Figure 1 The module block diagram of the first power supply control circuit provided in the embodiment of the present application. Figure 1It can be seen that the power control circuit provided in the embodiment of the present application includes a signal control circuit 100, a voltage acquisition circuit 200 and a boost circuit 300; wherein the signal control circuit 100 is used to output a corresponding level signal Level signal according to the acquired power control signal Power controlsignal to control at least two battery packs in the power supply 400 to be connected in series and / or in parallel; the voltage acquisition circuit 200 is used to acquire the voltage Supply voltage of the power supply 400; the boost circuit 300 is used to boost the input voltage Input voltage according to the voltage Supply voltage of the power supply 400, and output the boosted voltage Boost voltage. Here, the voltage Supply voltage of the power supply 400 includes a first voltage Supply voltage A and a second voltage Supply voltage B; wherein the first voltage Supply voltage A is the output voltage of the power supply 400, that is, the voltage difference between the positive and negative electrodes of the power supply 400, and the voltage acquisition circuit 200 uses the output voltage of the power supply 400 as the input voltage; the second voltage Supply voltage B is the output voltage obtained by the voltage acquisition circuit 200 according to the first voltage Supply voltage A. The boost circuit 300 boosts its input voltage Input voltage according to the second voltage Supply voltage B, and outputs the boosted voltage Boost voltage. As an implementation, the first voltage Supply voltage A is proportional to the second voltage Supply voltage B, that is, the second voltage Supply voltage B is m times the first voltage Supply voltage A, for example, m is equal to 0.5, 1, 2, and 2.5, etc.

[0025] As an implementation mode, the power supply 400 includes two battery packs; in this case, the two battery packs in the power supply 400 can be controlled to be connected in series by the level signal Levelsignal, or the two battery packs in the power supply 400 can be controlled to be connected in parallel by the level signal Levelsignal. In other implementation modes, the power supply 400 includes r (r≥3) battery packs, for example, three battery packs; in this case, the three battery packs in the power supply 400 can be controlled to be connected in series by the level signal Levelsignal, or the three battery packs in the power supply 400 can be controlled to be connected in parallel by the level signal Levelsignal, any two battery packs in the power supply 400 can be controlled to be connected in series and then in parallel with another battery pack by the level signal Levelsignal, or any two battery packs in the power supply 400 can be controlled to be connected in parallel and then in series with another battery pack by the level signal Levelsignal. The embodiment of the present application does not make a unique limitation on the number of battery packs included in the power supply 400 and the form of controlling the battery packs in the power supply 400 in series or in parallel by the level signal Levelsignal.

[0026] In some embodiments, since the signal control circuit 100 outputs a corresponding level signal Level signal according to the acquired power control signal Power controlsignal to control at least two battery packs in the power supply 400 to be connected in series and / or in parallel, the power control signal Power control signal includes a series control signal (represented by Power controlsignal 1) and / or a parallel control signal (represented by Power control signal 2), that is, the power control signal Power control signal may include the series control signal Power control signal 1, or the parallel control signal Power control signal 2, or the series control signal Power control signal 1 and the parallel control signal Power control signal 2. In addition, since the boost circuit 300 boosts the input voltage Input voltage according to the second voltage Supply voltage B, the second voltage Supply voltage B may be used as a control voltage or a reference voltage when the boost circuit 300 boosts the input voltage Input voltage.

[0027] In some embodiments, the power control signal Power control signal acquired by the signal control circuit 100 can be input by the user according to actual needs. Then, after the user inputs the power control signal Power control signal, the signal control circuit 100 will output the corresponding level signal Level signal according to the power control signal Power control signal input by the user, and use the level signal Level signal to control the series and parallel connection or series and parallel switching of at least two battery packs in the power supply 400; the voltage acquisition circuit 200 will acquire the first voltage Supply voltage A, and output the second voltage Supply voltage B, so that the boost circuit 300 can boost the input voltage Input voltage according to the second voltage Supply voltage B, and output the boosted voltage Boost voltage for power supply.

[0028] In this process, since the boost circuit 300 boosts the input voltage Input voltage according to the second voltage Supply voltage B, and the second voltage Supply voltage B is proportional to the first voltage Supply voltage A, once the first voltage Supply voltage A changes, the second voltage Supply voltage B and the boosted voltage Boost voltage output by the boost circuit 300 will also change accordingly; therefore, the boosted voltage Boost voltage output by the boost circuit 300 is adapted to the first voltage Supply voltage A and the second voltage Supply voltageB.

[0029] Since the power control signal obtained by the embodiment of the present application can be input by the user according to actual needs, the embodiment of the present application can control or switch at least two battery packs in the power supply 400 in series or parallel according to actual needs, thereby effectively improving the flexibility of the power supply 400.

[0030] Please read further Figure 2 , Figure 3 as well as Figure 4 , Figure 2 A block diagram of a second power control circuit provided in an embodiment of the present application. Figure 3 A block diagram of a third power control circuit provided in an embodiment of the present application. Figure 4 A module block diagram of the fourth power control circuit provided in an embodiment of the present application.

[0031] In some embodiments, Figure 2 As shown, the signal control circuit 100 may include a non-overlapping logic control module 110 and a level conversion module 120; wherein the non-overlapping logic control module 110 may be used to output a first level signal Level signal A according to the acquired power control signal Power control signal; the level conversion module 120 may be used to convert the first level signal Level signal A into a voltage domain to output a second level signal Level signal B, and the second level signal Level signal B may be used to control at least two battery packs in the power supply 400 to be connected in series and / or in parallel. It can be understood that the first level signal Level signal A and the second level signal Level signal B mentioned here both belong to the level signal Level signal mentioned above.

[0032] For this embodiment, the non-overlapping logic control module 110 can output a first level signal Level signal A including at least two non-overlapping clock signals according to the power control signal Power controlsignal. As an example, see Figure 5 , the power supply 400 includes two battery packs, and the connection states of the two battery packs can be controlled in series or in parallel by simultaneously controlling the connection states of switches S1, S2 and S3. Assume that switches S1, S2 and S3 are turned on at a high level and disconnected at a low level, and the user inputs a series control signal Power control signal 1. In order to connect the two battery packs in series, it is necessary to control switches S1 and S3 to be disconnected and switch S2 to be turned on, that is, a low level signal is input to switches S1 and S3 at the same time, and a high level signal is input to switch S2. When the series control signal Power control signal 1 is transmitted to the non-overlapping logic control module 110, the non-overlapping logic control module 110 outputs a high level signal for controlling S2 and a low level signal for controlling switches S1 and S3 according to the series control signal Power control signal 1, and these two clock signals do not overlap with each other. That is, the first level signal Level signal A at this time contains a high level signal for controlling S2 and a low level signal for controlling switches S1 and S3.

[0033] Still Figure 5As an example, since the switches S1, S2 and S3 that control the two battery groups in series or in parallel in the power supply 400 usually operate in the high voltage domain, and the control circuit for controlling the power supply 400 operates in the low voltage domain, it is necessary to convert the first level signal Level signal A in the voltage domain in some application scenarios, that is, to convert the first level signal Levelsignal A from a low voltage level to a high voltage level, or to convert the power control signal Power controlsignal from a low voltage domain to a high voltage domain.

[0034] In some embodiments, Figure 3 As shown, the second level signal Level signal B may include a series level signal Level signal B1 corresponding to the series control signal Power control signal 1 and / or a parallel level signal Level signal B2 corresponding to the parallel control signal Power control signal 2. On this basis, the signal control circuit 100 may further include a dead zone control module 150, which is used to control the time interval for switching between the series level signal Level signal B1 and the parallel level signal Level signal B2.

[0035] For this embodiment, since the power control signal Power control signal includes the series control signal Power control signal 1 and / or the parallel control signal Power control signal 2 (i.e., the power control signal Power control signal may include only the series control signal Power control signal 1, only the parallel control signal Power control signal 2, or both the series control signal Power control signal 1 and the parallel control signal Power control signal 2), the first level signal Level signal A includes the series level signal Level signal A1 corresponding to the series control signal Power control signal 1 and / or the parallel level signal Level signal A2 corresponding to the parallel control signal Power control signal 2. Correspondingly, the second level signal Level signal B also includes the series level signal Level signal B1 corresponding to the series control signal Power control signal 1 and / or the parallel level signal Level signal B2 corresponding to the parallel control signal Power control signal 2.

[0036] It can be understood that in practical applications, if at least two battery packs in the power supply 400 are controlled to be connected in series and / or in parallel at the same time; or, after the at least two battery packs in the power supply 400 are controlled to be connected in series, the at least two battery packs in the power supply 400 are immediately switched to be connected in parallel; or, after the at least two battery packs in the power supply 400 are controlled to be connected in parallel, the at least two battery packs in the power supply 400 are immediately switched to be connected in series; then, it may cause a conflict when switching between the series and parallel connection of at least two battery packs in the power supply 400, and in severe cases, it may cause a short circuit, thereby causing the power supply 400 to burn. Therefore, the embodiment of the present application uses the dead zone control module 150 to control the time interval of switching between the series level signal Level signal B1 and the parallel level signal Level signal B2, so as to avoid conflicts when the battery packs are switched between series and parallel, thereby improving the circuit safety.

[0037] In some embodiments, Figure 4As shown, the signal control circuit 100 may include, in addition to a non-overlapping logic control module 110, a level conversion module 120 and a dead zone control module 150, a first driver 130 and a second driver 140; wherein, the input ends of the first driver 130 and the second driver 140 may be connected to the dead zone control module 150 respectively, and the first driver 130 and the second driver 140 may be used to control at least two battery groups in the power supply 400 to be connected in series and / or in parallel according to a second level signal Level signal B.

[0038] Still Figure 5 As an example, the first driver 130 and the second driver 140 can be specifically used to control the switches S1, S2 and S3 to be closed or opened according to the second level signal Level signal B, so that the two battery packs in the power supply 400 are connected in series or in parallel. For example, the first driver 130 can control the switches S1 and S3 to be closed or opened according to the second level signal Level signal B; the second driver 140 can control the switch S2 to be closed or opened according to the second level signal Level signal B. It can be understood that in some application scenarios, the driving voltage and driving power required for the switches S1, S2 and S3 connected between different battery packs are relatively large. The first driver 130 and the second driver 140 can better drive the switches S1, S2 and S3 to be closed or opened, thereby improving the reliability of the circuit.

[0039] It should be understood that the above-mentioned implementation mode is only a preferred implementation of the embodiment of the present application, and is not the only limitation of the specific structure of the signal control circuit 100 in the embodiment of the present application; in this regard, those skilled in the art can flexibly set it according to the actual application scenario based on the embodiment of the present application.

[0040] Please read further Figure 5 as well as Figure 6 , Figure 5 A schematic diagram of the circuit structure of a fifth power supply control circuit provided in an embodiment of the present application, Figure 6 This is a timing diagram of the fifth power control circuit provided in an embodiment of the present application.

[0041] In some embodiments, Figure 5 As shown, the power supply 400 may include two battery packs, each battery pack includes n batteries, for example, the first battery pack includes batteries cell1...celln, and the second battery pack includes batteries cell(n+1)...cell2n; wherein n is a positive integer greater than 1. The plurality of switches controlled by the second level signal Level signal B mentioned above may include three (S1, S2 and S3). Figure 5As can be seen from the figure, the highest battery in the power supply 400 is cell2n, and its positive electrode is the positive electrode of the power supply 400; the lowest battery in the power supply 400 is cell1, and its negative electrode is the negative electrode of the power supply 400. Assuming that the voltage of each battery in the two battery packs is Vbat, the voltage difference between the highest battery cell2n and the lowest battery cell1 in the power supply 400, that is, the voltage difference between the positive and negative electrodes of the power supply 400 is: Battery + -Battery - =2n*Vbat. Further, the voltage Vbat of a single battery can be used as the input voltage Input voltage of the boost circuit 300; at this time, the boost circuit 300 will boost the voltage Vbat according to the second voltage Supply voltage B, and output the boosted voltage Boost voltage; or, the boost circuit 300 can also boost the voltage Vbat according to the first voltage Supply voltage A, that is, according to the voltage difference between the positive and negative electrodes of the power supply 400 (Battery+-Battery-), and output the boosted voltage Boost voltage.

[0042] In some embodiments, the boost circuit 300 may include a charge pump Charge Pump, a comparator CMP, and a voltage-dividing resistor; wherein the voltage-dividing resistor is connected between the output terminal of the charge pump Charge Pump and the ground terminal, and has at least one voltage-dividing node; the first input terminal of the comparator CMP is connected to the voltage acquisition circuit 200, the second input terminal of the comparator CMP is connected to the voltage-dividing node, and the output terminal of the comparator CMP is connected to the control terminal of the charge pump Charge Pump. Specifically, the comparator CMP is used to compare the second voltage Supply voltage B with the voltage of the voltage-dividing node, and output a control voltage according to the comparison result to control the charge pump Charge Pump to turn on or off; the charge pump Charge Pump is used to boost the input voltage Input voltage when it is turned on according to the control voltage, and output the boosted voltage Boost voltage. Figure 5 In the embodiment, the voltage dividing resistors include two resistors, namely, resistor R1 and resistor R2, and the common connection point between the resistor R1 and the resistor R2 is the voltage dividing node.

[0043] For this embodiment, since the voltage-dividing resistor is connected between the output terminal of the charge pump Charge Pump and the ground terminal, the voltage of the voltage-dividing node is related to the output voltage of the charge pump Charge Pump, that is, related to the boosted voltage Boostvoltage. Based on this, as the boosted voltage Boost voltage increases, the voltage of the voltage-dividing node will gradually increase; then, when the voltage of the voltage-dividing node is greater than the output voltage of the voltage acquisition circuit 200, that is, greater than the second voltage Supply voltage B, the comparator CMP can output a control signal to control the charge pump Charge Pump to be turned off.

[0044] Furthermore, the output end of the charge pump Charge Pump can be connected to the level conversion module 120 and the dead zone control module 150 respectively; at this time, the charge pump Charge Pump can also be used to power the level conversion module 120 and the dead zone control module 150 through the boosted voltage Boost voltage.

[0045] It can be understood that in some embodiments, the operating voltages of the level conversion module 120 and the dead zone control module 150 are relatively high. In this embodiment, the boosted voltage Boost voltage output by the charge pump Charge Pump is used to power the level conversion module 120 and the dead zone control module 150, and there is no need to set up additional power supplies for the level conversion module 120 and the dead zone control module 150, thereby saving circuit costs.

[0046] In addition, in this embodiment, the series connection or parallel connection of two battery packs can be controlled by setting a clock signal. Now, an example is given in which switches S1, S2 and S3 are all effective at high level (that is, S1, S2 and S3 are all closed at high level and open at low level). Figure 6 When the power control signal Power control signal only includes the series control signal Powercontrol signal 1, the series level signal Level signal A1 includes a high level for controlling the closing of S2 and a low level for controlling the opening of S1 and S3, then the corresponding series level signal Level signal B1 will control the opening of switches S1 and S3 and the closing of S2, that is, a high level will be input to S2, and a low level will be input to S1 and S3, so that the two battery packs can realize the series connection function; at this time, the voltage difference between the positive and negative electrodes of the power supply 400 (Battery + -Battery -) is 2n*Vbat. When the power control signal Powercontrol signal only includes the parallel control signal Power control signal 2, the parallel level signal Levelsignal A2 includes a low level to control S2 to be disconnected and a high level to control S1 and S3 to be closed, then the corresponding parallel level signal Levelsignal B2 will control switch S2 to be disconnected and S1 and S3 to be closed, that is, a high level will be input to S1 and S3, and a low level will be input to S2, so that the two battery packs can realize the parallel function; at this time, the voltage difference between the positive and negative electrodes of the power supply 400 (Battery + -Battery - ) is n*Vbat. When the power control signal Power control signal includes both the series control signal Power control signal 1 and the parallel control signal Power control signal 2, the series level signal Level signal B1 can first control the switches S1 and S3 to be disconnected and S2 to be closed (that is, a high level can be input to S2 first, and a low level can be input to S1 and S3), so that the two battery packs can realize the series function; thereafter, after the time interval indicated by the set clock signal, the parallel level signal Level signal B2 can control the switch S2 to be disconnected and S1 and S3 to be closed (that is, a high level can be input to S1 and S3 again, and a low level can be input to S2), so that the two battery packs can realize the parallel function. Of course, when the power control signal Power control signal includes both the series control signal Power control signal 1 and the parallel control signal Power control signal 2, the parallel level signal Level signal B2 can first control the two battery packs to realize the parallel function, and then, after the time interval indicated by the set clock signal, the series level signal Level signal B1 can control the two battery packs to realize the series function, and the embodiments of the present application are not repeated here. It can be understood that the switches S1, S2 and S3 cannot be in the closed state at the same time, otherwise a short circuit will be caused, which will cause the power supply 400 to burn out.

[0047] In some embodiments, Figure 5 As shown, the voltage acquisition circuit 200 may include a fully differential switched capacitor integration circuit, which is used to connect the positive and negative electrodes of the power supply 400, and obtain a first voltage Supply voltage A according to the voltage difference (Battery+-Battery-) between the positive and negative electrodes, and output a second voltage Supply voltage B.

[0048] As an implementation, the fully differential switched capacitor integration circuit may include: a first sampling node A, a second sampling node B, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a third switch S8, a fourth switch S9, a fifth switch S10, a sixth switch S11, a seventh switch S4, an eighth switch S7, and an operational amplifier 10A; wherein one end of the first capacitor C1 is connected to one end of the seventh switch S4, and the other end of the seventh switch S4 is used to connect to the positive electrode of the power supply 400; one end of the second capacitor C2 is connected to one end of the eighth switch S7, and the other end of the eighth switch S7 is used to connect to the negative electrode of the power supply 400; one end of the third switch S8 is connected to one end of the fourth switch S9; The other end of the second capacitor C2 and the other end of the fourth switch S9 are respectively connected to one end of the sixth switch S11; the other end of the fifth switch S10 and one end of the third capacitor C3 are respectively connected to the first input end of the operational amplifier 10A; the other end of the sixth switch S11 and one end of the fourth capacitor C4 are respectively connected to the second input end of the operational amplifier 10A; the other end of the fourth capacitor C4 is connected to the second output end of the operational amplifier 10A; the other end of the third capacitor C3 and the first output end of the operational amplifier 10A are respectively connected to the boost circuit 300, specifically connected to the first input end of the comparator CMP in the boost circuit 300.

[0049] For this embodiment, the fully differential switched capacitor integration circuit can sample the voltage difference (Battery+-Battery-) between the positive and negative electrodes of the power supply 400, that is, it can sample the first voltage Supply voltage A, and its output voltage is the product of the voltage difference (Battery+-Battery-) between the positive and negative electrodes of the power supply 400 and the corresponding integral coefficient q, that is, the second voltage Supply voltage B=q*(Battery+-Battery-).

[0050] Further, the voltage acquisition circuit 200 may also include: a first switch S5 and a second switch S6; wherein one end of the first switch S5 is used to connect the positive electrode of the power supply 400, and the other end of the first switch S5 is connected to the first sampling node A; one end of the second switch S6 is used to connect the negative electrode of the power supply 400, and the other end of the second switch S6 is connected to the second sampling node B. At this time, after the fully differential switched capacitor integration circuit samples the voltage difference (Battery+-Battery-) between the positive and negative electrodes of the power supply 400, that is, after sampling the first voltage Supply voltage A, the voltage outputted by the fully differential switched capacitor integration circuit is twice the product of the voltage difference (Battery+-Battery-) between the positive and negative electrodes of the power supply 400 and the corresponding integral coefficient q, that is, the second voltage Supply voltage B=q*(Battery+-Battery-)*2. Here, it is necessary to explain that the purpose of adding the first switch S5 and the second switch S6 is to expand the range of sampling the voltage difference (Battery+-Battery-) between the positive and negative electrodes of the power supply 400, that is, to expand the range of sampling the first voltage Supply voltage A (equivalent to increasing the second voltage Supply voltage B) and improve the signal-to-noise ratio.

[0051] It should be understood that the above-mentioned implementation mode is only a preferred implementation of the embodiment of the present application, and is not the only limitation of the embodiment of the present application on the specific structure of the boost circuit 300, the specific structure of the voltage acquisition circuit 200, and the specific selection of the input voltage Input voltage of the charge pump Charge Pump; in this regard, those skilled in the art can flexibly set it according to the actual application scenario based on the embodiment of the present application.

[0052] Please read further Figure 7 , Figure 7 A control flow diagram of a fifth power control circuit provided in an embodiment of the present application.

[0053] In order to clearly understand the power control circuit provided in the embodiment of the present application, the control flow of the power control circuit provided in the embodiment of the present application will be described in detail below in combination with the above embodiment and the corresponding implementation method. Figure 7 It can be seen that the control process of the power control circuit provided in the embodiment of the present application includes the following steps 101 to 108.

[0054] Step 101: The user inputs a power control signal according to actual needs;

[0055] In this embodiment, since the power control signal can be input by the user according to actual needs, the embodiment of the present application can control or switch at least two battery packs in the power supply 400 in series or parallel according to actual needs, thereby effectively improving the flexibility of the power supply 400.

[0056] In other embodiments, the power control signal Power control signal may also be generated by other devices or other circuits, and the power control circuit may obtain the power control signal Power control signal from other devices or other circuits.

[0057] Step 102, the non-overlapping logic control module 110 outputs a first level signal Level signal A according to the power control signal Power control signal;

[0058] In this embodiment, the non-overlapping logic control module 110 can output a first level signal Level signal A including at least two non-overlapping clock signals according to the power control signal Power controlsignal.

[0059] Step 103, the level conversion module 120 converts the first level signal Level signal A into a voltage domain, and outputs a second level signal Level signal B;

[0060] In this embodiment, the level conversion module 120 is used to convert the first level signal Level signal A in the voltage domain, for example, converting the first level signal Level signal A in the low voltage domain into the second level signal Level signal B in the high voltage domain, so that the second level signal Level signal B in the high voltage domain can more easily drive multiple switches to control at least two battery groups in the power supply 400 to be connected in series and / or in parallel.

[0061] Step 104, the dead zone control module 150 controls the time interval of switching between the series level signal Level signal B1 and the parallel level signal Level signal B2 in the second level signal Level signal B;

[0062] In this embodiment, the dead zone control module 150 is used to control the time interval for switching between the series level signal Level signal B1 and the parallel level signal Level signal B2 in the second level signal Level signal B, thereby ensuring that there is no conflict when switching between series and parallel of at least two battery packs in the power supply 400, thereby effectively avoiding the burning of the power supply 400 due to a short circuit.

[0063] Step 105: The first driver 130 and the second driver 140 use the second level signal Level signal B to control the closing or closing of multiple switches, thereby controlling at least two battery packs in the power supply 400 to be connected in series and / or in parallel;

[0064] Step 106: collect the first voltage Supply voltage A through a fully differential switched capacitor integration circuit, and output the second voltage Supply voltage B to the first input terminal of the comparator CMP;

[0065] In this embodiment, the range for sampling the voltage difference (Battery+-Battery-) between the positive and negative electrodes of the power supply 400 can be expanded by adding the first switch S5 and the second switch S6, that is, the range for sampling the first voltage Supply voltage A can be expanded (equivalent to increasing the second voltage Supply voltage B), and the signal-to-noise ratio can be improved.

[0066] Step 107, the comparator CMP compares the second voltage Supply voltage B with the voltage of the voltage division node, and outputs a control voltage to the charge pump Charge Pump according to the comparison result, so as to control the charge pump Charge Pump to be turned on or off;

[0067] Step 108, when the charge pump Charge Pump is turned on according to the control voltage, it boosts the input voltage Input voltage and outputs the boosted voltage Boost voltage to the corresponding electronic device to power the corresponding electronic device; and / or outputs the boosted voltage Boost voltage to the level conversion module 120 and the dead zone control module 150 to power the level conversion module 120 and the dead zone control module 150.

[0068] In this embodiment, the comparator CMP is first used to output a control voltage to the charge pump Charge Pump according to the second voltage Supply voltage B and the voltage of the voltage dividing node, and then the charge pump Charge Pump is used to boost the input voltage Input voltage according to the control voltage output by the comparator CMP, and output the boosted voltage Boost voltage, so that the boosted voltage Boost voltage can adapt to the second voltage Supply voltage B and the first voltage Supply voltage A, thereby effectively improving the adaptive ability of the power control circuit. In addition, in this embodiment, the boosted voltage Boost voltage is used as the power supply voltage of the level conversion module 120 and the dead zone control module 150, so that the first driver 130 and the second driver 140 can drive multiple switches to control or switch at least two battery packs in the power supply 400 in series or parallel.

[0069] It should be noted that each step in the above steps 101-108 can be performed simultaneously or sequentially, and the present application does not limit the sequence of the steps.

[0070] In summary, the embodiment of the present application provides a power control circuit. In fact, the power control circuit can be applied to an integrated circuit including multiple circuits; wherein the multiple circuits included in the integrated circuit include at least one power control circuit provided by the embodiment of the present application. Moreover, the power control circuit can also be applied to a power module including a power supply having at least two battery packs, so as to control or switch the at least two battery packs in series or parallel.

[0071] On this basis, the above-mentioned power module can be applied to electronic devices; wherein, the electronic devices may include but are not limited to mobile phones, tablet computers, laptop computers, desktop computers, smart learning machines and smart wearable devices.

[0072] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0073] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in this application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk), etc.

[0074] It should be noted that the various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0075] It should also be noted that, in the present application, relational terms such as first and second, etc. 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 terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0076] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown in the present application, but will conform to the widest range consistent with the principles and novel features disclosed in the present application.

Claims

1. A power supply control circuit, applied to a power supply having at least two battery packs, characterized in that: The power supply control circuit includes: a signal control circuit, a voltage acquisition circuit and a boost circuit; The signal control circuit includes a non-overlapping logic control module and a level conversion module; The non-overlapping logic control module is used to output a first level signal according to the acquired power control signal; wherein the first level signal includes two clock signals that do not overlap with each other; The level conversion module is used to convert the first level signal into a voltage domain to output a second level signal; wherein the second level signal is used to control at least two of the battery packs to be connected in series and / or in parallel; The second level signal includes a series level signal corresponding to the series control signal and / or a parallel level signal corresponding to the parallel control signal; The signal control circuit further comprises a dead zone control module, wherein the dead zone control module is used to control the time interval for switching between the series level signal and the parallel level signal; The voltage acquisition circuit is used to obtain the voltage of the power supply; The boost circuit is used to boost the input voltage according to the voltage of the power supply and output the boosted voltage.

2. The power control circuit according to claim 1, characterized in that: The signal control circuit also includes: a first driver and a second driver; the input ends of the first driver and the second driver are respectively connected to the dead zone control module, and the first driver and the second driver are used to control the closing or opening of multiple switches connected between at least two of the battery packs according to the second level signal, so as to connect at least two of the battery packs in series and / or in parallel.

3. The power control circuit according to claim 1, characterized in that: The boost circuit comprises: a charge pump, a comparator and a voltage-dividing resistor, wherein the voltage-dividing resistor is connected between the output terminal of the charge pump and the ground terminal and has at least one voltage-dividing node; The first input end of the comparator is connected to the voltage acquisition circuit, the second input end of the comparator is connected to the voltage division node, and the output end of the comparator is connected to the control end of the charge pump; the comparator is used to compare the voltage of the power supply with the voltage of the voltage division node, and output a control voltage according to the comparison result, and the control voltage is used to control the charge pump to be turned on or off; The charge pump is used to boost the input voltage and output the boosted voltage when it is turned on according to the control voltage.

4. The power control circuit according to claim 3, characterized in that: The output end of the charge pump is connected to the level conversion module and the dead zone control module respectively, and is used to supply power to the level conversion module and the dead zone control module through the boosted voltage.

5. The power control circuit according to claim 1, characterized in that: The voltage acquisition circuit includes a fully differential switched capacitor integration circuit, which is used to connect the positive electrode and the negative electrode of the power supply and obtain the voltage of the power supply according to the voltage difference between the positive electrode and the negative electrode.

6. The power control circuit according to claim 5, characterized in that: The fully differential switched capacitor integration circuit includes a first sampling node and a second sampling node, and the voltage acquisition circuit also includes a first switch and a second switch; One end of the first switch is used to connect the positive electrode of the power supply, and the other end of the first switch is connected to the first sampling node; one end of the second switch is used to connect the negative electrode of the power supply, and the other end of the second switch is connected to the second sampling node.

7. An integrated circuit, characterized in that: The invention comprises a power supply control circuit as claimed in any one of claims 1 to 6.

8. A power module, characterized in that: include: A power supply having at least two battery packs and a power supply control circuit as claimed in any one of claims 1 to 6.

9. The power module according to claim 8, characterized in that: The battery packs are further comprised of a plurality of switches, through which the at least two battery packs are connected in series and / or in parallel.

10. An electronic device, characterized in that: Comprising the power supply module as claimed in claim 8 or 9.

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