CN113746163A - Power control circuit, integrated circuit, power module and electronic equipment - Google Patents
Power control circuit, integrated circuit, power module and electronic equipment Download PDFInfo
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- CN113746163A CN113746163A CN202110944236.0A CN202110944236A CN113746163A CN 113746163 A CN113746163 A CN 113746163A CN 202110944236 A CN202110944236 A CN 202110944236A CN 113746163 A CN113746163 A CN 113746163A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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Abstract
The 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 with at least two battery packs. The power supply control circuit includes: the voltage acquisition circuit comprises a signal control circuit, a voltage acquisition circuit and a booster circuit; the signal control circuit is used for outputting a corresponding level signal according to the acquired power supply control signal so as to control the at least two battery packs to be connected in series and/or in parallel, and the power supply control signal comprises a series control signal and/or a parallel control signal; the voltage acquisition circuit is used for acquiring the voltage of the power supply; the booster circuit is used for boosting the input voltage according to the voltage of the power supply and outputting the boosted voltage. According to the power supply control method and the power supply control device, series and parallel control or switching of at least two battery packs in the power supply can be achieved according to actual needs, and therefore the flexibility of the power supply can be effectively improved.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of power control, in particular to a power control circuit, an integrated circuit, a power module and electronic equipment.
[ background of the invention ]
In the related art, the most common application form of the power supply is a battery pack; wherein the battery pack includes a plurality of batteries. The battery pack can be divided into three types according to different connection modes of a plurality of batteries in the battery pack; the first type is a series battery pack which comprises a plurality of batteries connected in series, and is suitable for occasions requiring higher voltage; the second type is a parallel battery pack, which comprises a plurality of batteries connected in parallel, and is suitable for occasions requiring higher battery capacity and higher current; the third type is a series-parallel hybrid battery pack, which comprises at least two sub-battery packs connected in parallel, wherein each sub-battery pack comprises a plurality of batteries connected in series, and is suitable for occasions needing to provide working voltage and working current in a segmented manner. For a power supply formed by a series-parallel hybrid battery pack, a corresponding control circuit of the power supply cannot perform series-parallel conversion on at least two sub battery packs according to actual needs, so that the flexibility of the power supply is poor.
Therefore, it is necessary to improve the structure of the control circuit of the power supply constituted by the series-parallel hybrid battery pack.
[ summary of the invention ]
The application provides a power control circuit, an integrated circuit, a power module and electronic equipment, and aims to solve the problem of poor flexibility of a power supply in the related art.
In order to solve the above technical problem, a first aspect of the embodiments of the present application provides a power control circuit applied to a power supply having at least two battery packs, including: the voltage acquisition circuit comprises a signal control circuit, a voltage acquisition circuit and a booster circuit;
the signal control circuit is used for outputting a corresponding level signal according to the acquired power supply control signal so as to control at least two battery packs to be connected in series and/or in parallel; wherein the power control signal comprises a series control signal and/or a parallel control signal;
the voltage acquisition circuit is used for acquiring the voltage of the power supply;
the boost circuit is used for boosting the input voltage according to the voltage of the power supply and outputting the boosted voltage.
A second aspect of an embodiment of the present application provides an integrated circuit including the power control circuit according to the first aspect of the embodiment of the present application.
A third aspect of the embodiments of the present application provides a power module, including: a power supply having at least two battery packs and a power supply control circuit as described in the first aspect of embodiments of the present application.
A fourth aspect of the embodiments of the present application provides an electronic device, including the power module according to the third aspect of the embodiments of the present application.
As can be seen from the above description, the present application has the following advantages compared with the related art:
firstly, outputting a corresponding level signal through a signal control circuit according to an obtained power supply control signal so as 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 obtained by the voltage acquisition circuit; and finally, boosting the input voltage through the booster circuit according to the voltage of the power supply, and outputting the boosted voltage for power supply. In the process, the power supply control signal acquired by the signal control circuit can be input by a user according to actual needs, so that series and parallel control or switching of at least two battery packs in the power supply can be realized according to actual needs, and the flexibility of the power supply can be effectively improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the related art or the embodiments of the present application, the drawings needed to be used in the description of the related art or the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, not all embodiments, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a block diagram of a first power control circuit according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a second power control circuit according to an embodiment of the present application;
FIG. 3 is a block diagram of a third power control circuit according to an embodiment of the present disclosure;
FIG. 4 is a block diagram of a fourth power control circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit structure diagram of a fifth power control circuit according to an embodiment of the present disclosure;
fig. 6 is a timing diagram of a fifth power control circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic control flow diagram of a fifth power control circuit according to an embodiment of the present disclosure.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present application more apparent and understandable, 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 denote the same or similar elements or elements having the same or similar functions throughout. It should be understood that the embodiments of the present application described below are only for explaining the present application and are not intended to limit the present application, that is, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments of the present application belong to the protection scope of the present application. In addition, the technical features involved in the embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
In the related art, for a power supply composed of a series-parallel hybrid battery pack, a corresponding control circuit of the power supply cannot perform series-parallel conversion on at least two sub battery packs inside the power supply according to actual needs, so that the flexibility of the power supply is poor. To this end, the embodiment of the present application provides a power 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 with each other. Hereinafter, the above power source having at least two battery packs will be denoted by reference numeral 400.
Referring to fig. 1, fig. 1 is a block diagram of a first power control circuit according to an embodiment of the present disclosure. As can be seen from fig. 1, the power supply control circuit provided in the embodiment of the present application includes a signal control circuit 100, a voltage acquisition circuit 200, and a voltage boost circuit 300; the signal control circuit 100 is configured to output a corresponding Level signal according to the obtained Power control signal, so as 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 for acquiring a Supply voltage of the power Supply 400; the booster circuit 300 is configured to Boost an Input voltage according to a Supply voltage of the power Supply 400, and output a boosted 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 an output voltage of the power Supply 400, that is, a voltage difference between an anode and a cathode of the power Supply 400, and the voltage acquisition circuit 200 takes the output voltage of the power Supply 400 as an input voltage; the second voltage Supply voltage B is an output voltage obtained by the voltage acquisition circuit 200 according to the first voltage Supply voltage a. The booster circuit 300 boosts the Input voltage according to the second voltage Supply voltage B, and outputs the boosted voltage Boost voltage. As an embodiment, the first voltage Supply voltage a is proportional to the second voltage Supply voltage B, i.e. 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, 2.5, etc.
As an embodiment, the power supply 400 includes two battery packs; at this time, the two battery packs in the power supply 400 may be controlled to be connected in series by the Level signal, or the two battery packs in the power supply 400 may be controlled to be connected in parallel by the Level signal. In other embodiments, power supply 400 includes r (r ≧ 3) battery packs, such as three battery packs; at this time, three battery packs in the power supply 400 may be controlled to be connected in series by the Level signal, three battery packs in the power supply 400 may also be controlled to be connected in parallel by the Level signal, any two battery packs in the power supply 400 may also be controlled to be connected in series by the Level signal and then connected in parallel with another battery pack, and any two battery packs in the power supply 400 may also be controlled to be connected in parallel by the Level signal and then connected in series with another battery pack. The number of battery packs included in the power supply 400 and the form of controlling the series connection and the parallel connection of the battery packs in the power supply 400 through a Level signal are not limited uniquely in the embodiment of the present application.
In some embodiments, since the signal control circuit 100 outputs a corresponding Level signal according to the obtained Power control signal to control at least two battery packs in the Power source 400 to be connected in series and/or in parallel, the Power control signal includes a series control signal (denoted by Power control signal 1) and/or a parallel control signal (denoted by Power control signal 2), that is, the 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. Further, since the booster circuit 300 boosts the 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 booster circuit 300 boosts the Input voltage.
In some embodiments, the Power control signal acquired by the signal control circuit 100 may be input by a user according to actual needs. Then, after the Power control signal is input by the user, the signal control circuit 100 outputs a corresponding Level signal according to the Power control signal input by the user, and performs serial-parallel control or serial-parallel switching on at least two battery packs in the Power supply 400 by using the Level signal; the voltage acquisition circuit 200 acquires a first voltage Supply voltage a and outputs a second voltage Supply voltage B, so that the voltage Boost circuit 300 can Boost the Input voltage according to the second voltage Supply voltage B and output a boosted voltage Boost voltage for power Supply.
In this process, since the boosting circuit 300 boosts the 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, when the first voltage Supply voltage a changes, the second voltage Supply voltage B and the boosted voltage Boost voltage output by the boosting circuit 300 also change; therefore, the boosted voltage Boost voltage output by the booster circuit 300 is adapted to the first voltage Supply a and the second voltage Supply B.
Because the Power control signal obtained in the embodiment of the present application can be input by the user according to actual needs, the embodiment of the present application can realize serial and parallel control or switching of at least two battery packs in the Power supply 400 according to actual needs, so that the flexibility of the Power supply 400 can be effectively improved.
Referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a block diagram of a second power control circuit according to an embodiment of the present disclosure, fig. 3 is a block diagram of a third power control circuit according to an embodiment of the present disclosure, and fig. 4 is a block diagram of a fourth power control circuit according to an embodiment of the present disclosure.
In some embodiments, as shown in fig. 2, the signal control circuit 100 may include a non-overlapping logic control module 110 and a level shift module 120; the non-overlapping logic control module 110 may be configured to output a first Level signal a according to the obtained Power control signal; the Level conversion module 120 may be configured to perform voltage domain conversion on the first Level signal a to output a second Level signal B, where the second 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 should be understood that the first Level signal a and the second Level signal B mentioned herein are both the Level signal Level signals mentioned above.
For this embodiment, the non-overlap logic control module 110 may output a first Level signal a including at least two non-overlapping clock signals according to the Power control signal. As an example, referring to fig. 5, the power supply 400 includes two battery packs, and the series or parallel connection of the two battery packs may be controlled by simultaneously controlling the connection states of the switches S1, S2, and S3. Assuming that the switches S1, S2, and S3 are turned on at a high level and turned off at a low level, the user inputs the series control signal Power control signal 1. In order to connect two battery packs in series, the switches S1 and S3 are controlled to be turned off, the switch S2 is turned on, i.e., a low level signal is simultaneously input to the switches S1 and S3, and a high level signal is simultaneously input to the switch S2. When the series control signal Power control signal 1 is transmitted to the non-overlap logic control module 110, the non-overlap logic control module 110 outputs a high level signal for controlling S2 and low level signals for controlling the switches S1 and S3 according to the series control signal Power control signal 1, and the two clock signals do not overlap with each other. That is, the first Level signal a at this time includes a high Level signal for controlling S2 and a low Level signal for controlling the switches S1 and S3.
Still taking fig. 5 as an example, since the switches S1, S2, and S3 for controlling the two battery packs in the Power supply 400 connected in series or in parallel usually operate in the high voltage domain, and the control circuit for controlling the Power supply 400 operates in the low voltage domain, in some application scenarios, it is necessary to perform the voltage domain conversion on the first Level signal Level a, that is, perform the low voltage Level to high voltage Level conversion on the first Level signal Level a, or perform the low voltage domain to high voltage domain conversion on the Power supply control signal Power control signal.
In some embodiments, as shown in fig. 3, the second Level signal B may include a series Level signal B1 corresponding to the series control signal Power control signal 1 and/or a parallel 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, configured to control a time interval at which the series Level signal B1 and the parallel Level signal B2 are switched with each other.
With this embodiment, since the 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 may include only the series control signal Power control signal 1, only the parallel control signal Power control signal 2, and both the series control signal Power control signal 1 and the parallel control signal Power control signal 2), the first Level signal a includes the series Level signal a1 corresponding to the series control signal Power control signal 1 and/or the parallel Level signal Level a2 corresponding to the parallel control signal Power control signal 2. Accordingly, the second Level signal B includes a series Level signal B1 corresponding to the series control signal Power control signal 1 and/or a parallel Level signal B2 corresponding to the parallel control signal Power control signal 2.
It is understood that, in practical applications, if at least two battery packs in the power supply 400 are controlled in series and/or in parallel at the same time; or immediately switching to the parallel connection of the at least two battery packs in the control power supply 400 after the at least two battery packs in the control power supply 400 are connected in series; or immediately switching to the series connection of the at least two battery packs in the control power supply 400 after the at least two battery packs in the control power supply 400 are connected in parallel; this may cause a conflict when switching between series connection and parallel connection of at least two battery packs in the power supply 400, and may cause a short circuit in a serious case, thereby causing the power supply 400 to burn out. Therefore, in the embodiment of the present application, the dead zone control module 150 is used to control the time interval of the mutual switching between the series Level signal B1 and the parallel Level signal B2, so as to avoid the collision of the battery pack during the series and parallel switching, thereby improving the circuit safety.
In some embodiments, as shown in fig. 4, the signal control circuit 100 may include a first driver 130 and a second driver 140 in addition to the non-overlapping logic control module 110, the level shift module 120, and the dead band control module 150; the input ends of the first driver 130 and the second driver 140 may be respectively connected to the dead zone control module 150, and the first driver 130 and the second driver 140 may be configured to control at least two battery packs in the power supply 400 to be connected in series and/or in parallel according to the second Level signal B.
Still taking fig. 5 as an example, the first driver 130 and the second driver 140 may be specifically configured to control the switches S1, S2, and S3 to be closed or opened according to the second Level signal B, so as to connect the two battery packs in the power supply 400 in series or in parallel. For example, the first driver 130 may control the switches S1 and S3 to be closed or opened according to the second Level signal B; the second driver 140 may control the switch S2 to be closed or opened according to the second Level signal B. It can be understood that in some application scenarios, the driving voltage and driving power required by the switches S1, S2, and S3 connected between different battery packs are large, and the switches S1, S2, and S3 can be better driven to be closed or opened by the first driver 130 and the second driver 140, so as to improve the reliability of the circuit.
It should be understood that the above-mentioned embodiments are only preferred implementations of the embodiments of the present application, and are not the only limitations on the specific configuration of the signal control circuit 100 in the embodiments of the present application; in this regard, a person skilled in the art can flexibly set the setting according to the actual application scenario on the basis of the embodiment of the present application.
Referring to fig. 5 and fig. 6, fig. 5 is a schematic circuit diagram of a fifth power control circuit according to an embodiment of the present disclosure, and fig. 6 is a timing diagram of the fifth power control circuit according to the embodiment of the present disclosure.
In some embodiments, as shown in fig. 5, the power supply 400 may include two battery packs, each battery pack includes n batteries, for example, a first battery pack includes a battery cell1.. cell n, and a second battery pack includes a battery cell (n + 1.. cell2 n; wherein n is a positive integer greater than 1. The aforementioned plurality of switches controlled by the second Level signal B may include three (S1, S2, and S3). As can be seen from fig. 5, the highest battery in the power supply 400 is cell2n, and the positive electrode thereof 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, i.e. the voltage difference between the positive pole and the negative pole of the power supply 400, is: battery+-Battery -2n Vbat. Further, the voltage Vbat of the single battery may be used as the Input voltage of the voltage boost circuit 300; at this time, the boosting circuit 300 boosts the voltage Vbat according to the second voltage Supply voltage B, and outputs the boosted voltage Boost voltage; alternatively, the voltage Boost circuit 300 may Boost the voltage Vbat according to the first voltage Supply voltage a, that is, according to the voltage difference (Battery + -Battery-) between the positive electrode and the negative electrode of the power Supply 400, and output the boosted voltage Boost.
In some embodiments, the boosting circuit 300 may include a Charge Pump, a comparator CMP, and a voltage dividing resistor; the voltage dividing resistor is connected between the output end of the Charge Pump and a grounding end and is provided with at least one voltage dividing node; a first input terminal of the comparator CMP is connected to the voltage acquisition circuit 200, a second input terminal of the comparator CMP is connected to the voltage division node, and an output terminal of the comparator CMP is connected to the control terminal of the Charge Pump. Specifically, the comparator CMP is configured to compare the second voltage Supply voltage B with a voltage of the voltage dividing node, and output a control voltage according to a comparison result to control the Charge Pump to turn on or turn off; the Charge Pump is used for boosting the Input voltage when the Charge Pump is started according to the control voltage, and outputting the boosted voltage. In fig. 5, the voltage dividing resistor includes two resistors R1 and R2, and a common node between the resistor R1 and the resistor R2 is a voltage dividing node.
For this embodiment, since the voltage dividing resistor is connected between the output terminal of the Charge Pump and the ground terminal, the voltage of the voltage dividing node is related to the output voltage of the Charge Pump, that is, the boosted voltage Boost voltage. Based on this, as the boosted voltage Boost voltage rises, the voltage of the voltage division node also gradually rises; 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 B, the comparator CMP may output a control signal to control the Charge Pump to turn off.
Further, the output terminal of the Charge Pump may be connected to the level conversion module 120 and the dead zone control module 150, respectively; at this time, the Charge Pump may also be configured to supply power to the level conversion module 120 and the dead zone control module 150 through the boosted voltage Boost voltage.
It is 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 output by the Charge Pump is used to supply power to the level conversion module 120 and the dead zone control module 150, and there is no need to additionally provide a power supply for the level conversion module 120 and the dead zone control module 150, so as to save circuit cost.
Further, in this embodiment, the series or parallel connection of the two battery packs may be controlled by setting a clock signal. The switches S1, S2, and S3 are all active high (also S1, S2, and S3 are all closed at high and open at low). With reference to fig. 6, when the Power control signal only includes the series control signal Power control signal 1, the series Level signal Level a1 includes a high Level for controlling the closing of S2 and a low Level for controlling the opening of S1 and S3, and then the corresponding series Level signal Level B1 controls the opening of the switches S1 and S3 and the closing of S2, that is, the high Level is input to S2 and the low Level is input to S1 and S3, so that the two battery packs realize the series function; at this time, the voltage difference (Battery) between the positive and negative poles of the power supply 400+-Battery-) Is 2n × Vbat. When the Power control signal only includes the parallel control signal Power control signal 2, the parallel Level signal Level a2 includes a low Level for controlling the opening of S2 and a high Level for controlling the closing of S1 and S3, and then the corresponding parallel Level signal Level B2 controls the opening of the switch S2 and the closing of S1 and S3, that is, the high levels are input to S1 and S3, and the low levels are input to S2, so that the two battery packs realize the parallel function; at this time, the voltage difference (Battery) between the positive and negative poles of the power supply 400+-Battery-) Is n × Vbat. When the 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 B1 may first control the switches S1 and S3 to be open and S2 to be closed (i.e., the high Level may be input to S2 first, and the low Level may be input to S1 and S3), so that the two battery packs realize the series function; then, after the lapse of the time interval indicated by the set clock signal,the parallel Level signal B2 may control the switch S2 to open and the switches S1 and S3 to close again (i.e., a high Level may be input to S1 and S3, and a low Level may be input to S2), so that the two battery packs realize the parallel function. Of course, when the Power control signal includes the series control signal Power control signal 1 and the parallel control signal Power control signal 2, the parallel Level signal B2 may 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 B1 may control the two battery packs to realize the series function again, which is not described herein again in the embodiments of the present application. It will be appreciated that the switches S1, S2, and S3 cannot be closed at the same time, which would otherwise cause a short circuit and cause the power supply 400 to burn out.
In some embodiments, as shown in fig. 5, the voltage collecting circuit 200 may include a fully differential switched capacitor integrating circuit for connecting the positive electrode and the negative electrode of the power Supply 400, and obtaining a first voltage Supply a according to a voltage difference (Battery + -Battery-) between the positive electrode and the negative electrode, and outputting a second voltage Supply B.
As an embodiment, a fully differential switched-capacitor integrator 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 IOA; 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 connected 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 for connecting the negative pole 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 first capacitor C1 and the other end of the third switch S8 are connected to one end of the fifth switch S10, respectively; the other end of the second capacitor C2 and the other end of the fourth switch S9 are connected to one end of a sixth switch S11, respectively; 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 IOA; 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 IOA; the other end of the fourth capacitor C4 is connected to the second output end of the operational amplifier IOA; the other end of the third capacitor C3 and the first output terminal of the operational amplifier IOA are respectively connected to the voltage boost circuit 300, and specifically to the first input terminal of the comparator CMP in the voltage boost circuit 300.
For this embodiment, the fully differential switched capacitor integration circuit may sample a voltage difference (Battery + -Battery-) between the positive electrode and the negative electrode of the power Supply 400, that is, may sample the first voltage Supply a, and output a voltage that is a product of the voltage difference (Battery + -Battery-) between the positive electrode and the negative electrode of the power Supply 400 and a corresponding integration coefficient q, that is, the second voltage Supply B ═ q (Battery + -Battery-).
Further, the voltage acquisition circuit 200 may further include: a first switch S5 and a second switch S6; one end of the first switch S5 is connected to 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 connected to the negative terminal 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 electrode and the negative electrode of the power Supply 400, that is, after the first voltage Supply a is sampled, the output voltage is 2 times the product of the voltage difference (Battery + -Battery-) between the positive electrode and the negative electrode of the power Supply 400 and the corresponding integration coefficient q, that is, the second voltage Supply B ═ q (Battery + -Battery-) 2. Here, it is necessary to explain that the first switch S5 and the second switch S6 are added for the purpose of: the range of sampling the voltage difference (Battery + -Battery-) between the positive and negative electrodes of the power Supply 400, that is, the range of sampling the first voltage Supply a (which is equivalent to increasing the second voltage Supply B), is enlarged, and the signal-to-noise ratio is improved.
It should be understood that the foregoing embodiments are merely preferred implementations of the embodiments of the present application, and are not the only limitations on the specific configurations of the boost circuit 300, the specific configuration of the voltage acquisition circuit 200, and the specific selection of the Input voltage of the Charge Pump in the embodiments of the present application; in this regard, a person skilled in the art can flexibly set the setting according to the actual application scenario on the basis of the embodiment of the present application.
Referring to fig. 7, fig. 7 is a schematic control flow chart of a fifth power control circuit according to an embodiment of the present disclosure.
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 with reference to the above embodiment and the corresponding implementation manner. As can be seen from fig. 7, the control flow of the power control circuit provided in the embodiment of the present application includes the following steps 101 to 108.
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 implement serial and parallel control or switching of at least two battery packs in the Power supply 400 according to actual needs, so as to effectively improve the flexibility of the Power supply 400.
In other embodiments, the Power control signal may be generated by other devices or other circuits, and the Power control circuit may obtain the Power control signal from other devices or other circuits.
102, the non-overlapping logic control module 110 outputs a first Level signal A according to the Power control signal Power control signal;
in this embodiment, the non-overlap logic control module 110 may output a first Level signal a including at least two non-overlapping clock signals according to the Power control signal.
103, the Level conversion module 120 performs voltage domain conversion on the first Level signal a and outputs a second Level signal B;
in this embodiment, the Level conversion module 120 is used to perform voltage domain conversion on the first Level signal Level a, for example, convert the first Level signal Level a in a low voltage domain into the second Level signal B in a high voltage domain, so that the second Level signal B in the high voltage domain can more easily drive a plurality of switches to control at least two battery packs in the power supply 400 to be connected in series and/or in parallel.
104, controlling the time interval of mutual switching of the serial Level signal B1 and the parallel Level signal B2 in the second Level signal B by the dead zone control module 150;
in this embodiment, the dead zone control module 150 is used to control the time interval of the mutual switching between the series Level signal B1 and the parallel Level signal B2 in the second Level signal B, so as to ensure that the series and parallel of at least two battery packs in the power supply 400 are not collided when being switched, thereby effectively avoiding the power supply 400 being burnt due to short circuit.
in this embodiment, the first switch S5 and the second switch S6 can be added to expand the range of sampling the voltage difference (Battery + -Battery-) between the positive and negative electrodes of the power Supply 400, that is, the range of sampling the first voltage Supply a (which is equivalent to increasing the second voltage Supply B), and improve the signal-to-noise ratio.
In this embodiment, the comparator CMP outputs a control voltage to the Charge Pump according to the second voltage Supply voltage B and the voltage of the voltage-dividing node, and then the Charge Pump boosts the Input voltage according to the control voltage output by the comparator CMP, and outputs the boosted voltage Boost voltage, so that the boosted voltage Boost voltage can be adapted to the second voltage Supply voltage B and the first voltage Supply voltage a, thereby effectively improving the adaptive capability of the power control circuit. In addition, in the present 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 a plurality of switches to perform serial and parallel control or switching on at least two battery packs in the power supply 400.
It should be noted that, each step in the steps 101-108 may be performed simultaneously or sequentially, and the sequence of each step is not limited in the present application.
In summary, the embodiments of the present application provide a power control circuit. In practice, the power supply control circuit may be applied to an integrated circuit including a plurality of circuits; the integrated circuit comprises a plurality of circuits, wherein at least one of the circuits comprises a power control circuit provided by the embodiment of the application. Moreover, the power supply control circuit can also be applied to a power supply module comprising a power supply with at least two battery packs so as to control or switch the at least two battery packs in series and parallel connection.
On the basis, the power module can be applied to electronic equipment; the electronic device may include, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a desktop computer, an intelligent learning machine, and an intelligent wearable device.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 procedures or functions described in accordance with the present application are generated, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk), among others.
It should be noted that, the embodiments in the present disclosure are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is further noted that, within the context of this application, relational terms such as first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A power control circuit for use with a power supply having at least two battery packs, the power control circuit comprising: the voltage acquisition circuit comprises a signal control circuit, a voltage acquisition circuit and a booster circuit;
the signal control circuit is used for outputting a corresponding level signal according to the acquired power supply control signal so as to control at least two battery packs to be connected in series and/or in parallel; wherein the power control signal comprises a series control signal and/or a parallel control signal;
the voltage acquisition circuit is used for acquiring the voltage of the power supply;
the boost circuit is used for boosting the input voltage according to the voltage of the power supply and outputting the boosted voltage.
2. The power control circuit of claim 1, wherein the signal control circuit comprises a non-overlapping logic control module and a level shift module;
the non-overlapping logic control module is used for outputting a first level signal according to the acquired power supply control signal;
the level conversion module is used for converting the voltage domain of the first level signal to output a second level signal; wherein the second level signal is used for controlling at least two battery packs to be connected in series and/or in parallel.
3. The power supply control circuit according to claim 2, wherein 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, and the dead zone control module is used for controlling the time interval of switching the series level signal and the parallel level signal mutually.
4. The power control circuit of claim 3, wherein the signal control circuit further comprises: a first driver and a second driver; the input ends of the first driver and the second driver are respectively connected with the dead zone control module, and the first driver and the second driver are used for controlling a plurality of switches connected between at least two battery packs to be switched on or switched off according to the second level signal so as to enable the at least two battery packs to be connected in series and/or in parallel.
5. The power supply control circuit of claim 3, wherein the boost circuit comprises: the voltage divider comprises a charge pump, a comparator and a voltage dividing resistor, wherein the voltage dividing resistor is connected between an output end of the charge pump and a ground end and is provided with at least one voltage dividing node;
a first input end of the comparator is connected to the voltage acquisition circuit, a second input end of the comparator is connected to the voltage division node, and an output end of the comparator is connected to a control end of the charge pump; the comparator is used for comparing the voltage of the power supply with the voltage of the voltage division node and outputting a control voltage according to a comparison result, wherein the control voltage is used for controlling the charge pump to be switched on or switched off;
the charge pump is used for boosting the input voltage when the charge pump is started according to the control voltage and outputting the boosted voltage.
6. The power control circuit of claim 5, wherein an output terminal of the charge pump is connected to the level shift module and the dead band control module, respectively, for supplying power to the level shift module and the dead band control module via the boosted voltage.
7. The power control circuit of claim 1, wherein the voltage acquisition circuit comprises a fully differential switched capacitor integrator circuit for connecting a positive pole and a negative pole of the power source and deriving the voltage of the power source from a voltage difference between the positive pole and the negative pole.
8. The power control circuit of claim 7, wherein the fully differential switched-capacitor integration circuit includes a first sampling node and a second sampling node, the voltage acquisition circuit further including a first switch and a second switch;
one end of the first switch is used for being connected with the anode of the power supply, and the other end of the first switch is connected with the first sampling node; one end of the second switch is used for being connected with the negative electrode of the power supply, and the other end of the second switch is connected with the second sampling node.
9. An integrated circuit comprising a power control circuit as claimed in any one of claims 1 to 8.
10. A power module, comprising: a power supply having at least two battery packs and a power supply control circuit as claimed in any one of claims 1 to 8.
11. The power module as claimed in claim 10, further comprising a plurality of switches, wherein the at least two battery packs are connected in series and/or in parallel by the plurality of switches.
12. An electronic device comprising the power module of claim 10 or 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110944236.0A CN113746163A (en) | 2021-08-17 | 2021-08-17 | Power control circuit, integrated circuit, power module and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110944236.0A CN113746163A (en) | 2021-08-17 | 2021-08-17 | Power control circuit, integrated circuit, power module and electronic equipment |
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| CN113746163A true CN113746163A (en) | 2021-12-03 |
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| CN202110944236.0A Pending CN113746163A (en) | 2021-08-17 | 2021-08-17 | Power control circuit, integrated circuit, power module and electronic equipment |
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