CN214670158U - Drive control circuit and lithium battery ultrasonic control system - Google Patents
Drive control circuit and lithium battery ultrasonic control system Download PDFInfo
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- CN214670158U CN214670158U CN202120763636.7U CN202120763636U CN214670158U CN 214670158 U CN214670158 U CN 214670158U CN 202120763636 U CN202120763636 U CN 202120763636U CN 214670158 U CN214670158 U CN 214670158U
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Abstract
A drive control circuit and a lithium battery ultrasonic control system realize signal conversion and power amplification of a control signal into a second voltage drive signal to an ultrasonic generator by adopting a main control circuit, an amplitude modulation circuit, a power amplification circuit and an output feedback circuit, and adjust the magnitude of the control signal in time by acquiring the second voltage drive signal accessed by the ultrasonic generator so as to form closed-loop drive control on the ultrasonic generator and realize automatic calibration; the output power is greatly amplified through the power amplifier circuit, and the heating problem is reduced; the drive control circuit solves the problems that the traditional ultrasonic control system for the lithium battery tab generates heat seriously and cannot realize the automatic calibration function.
Description
Technical Field
The application belongs to the technical field of lithium battery winding, and particularly relates to a drive control circuit and a lithium battery ultrasonic control system.
Background
At present, the ultrasonic control system of lithium battery tab is the essential subassembly in the automatic making of lithium cell, and traditional ultrasonic control system generally directly uses the analog signal control supersonic generator of digital-to-analog conversion circuit output, but the required energy ratio of welding lithium battery tab is great, and this kind of mode often can lead to generating heat seriously, and can't realize the automatic calibration function.
Therefore, the traditional ultrasonic control system for the lithium battery tab has the problems that the heating is serious and the automatic calibration function cannot be realized.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a drive control circuit and lithium cell ultrasonic control system, aim at solving and have the serious problem that just can't realize the automatic calibration function of generating heat among the ultrasonic control system of traditional lithium cell utmost point ear.
A first aspect of an embodiment of the present application provides a drive control circuit, connected to an ultrasonic generator, the drive control circuit including:
the master control circuit is used for outputting a control signal;
the amplitude modulation circuit is connected with the main control circuit and is used for generating a first voltage driving signal according to the control signal;
the power amplifier circuit is connected with the amplitude modulation circuit and is used for amplifying the first voltage driving signal to generate a second voltage driving signal and outputting the second voltage driving signal to the ultrasonic generator; and
the output feedback circuit is respectively connected with the power amplifier circuit and the main control circuit, and is used for acquiring the second voltage driving signal and generating an output feedback signal to the main control circuit;
and the main control circuit adjusts the magnitude of the control signal according to the output feedback signal so as to enable the voltage amplitude of the second voltage driving signal to be a target voltage amplitude.
In one embodiment, the output feedback circuit includes:
the voltage acquisition circuit is connected with the output end of the power amplification circuit and the main control circuit and is used for acquiring the voltage of the second voltage driving signal and generating a voltage signal;
the voltage zero crossing point judging circuit is connected with the voltage acquisition circuit and the main control circuit and is used for outputting voltage zero crossing point time to the main control circuit according to the voltage signal;
the current acquisition circuit is connected with the output end of the power amplification circuit and the main control circuit and is used for acquiring the current of the second voltage driving signal and generating a current signal; and
the current zero crossing point judging circuit is connected with the current collecting circuit and the main control circuit and is used for outputting a current phase to the main control circuit according to the current signal.
In one embodiment, the power amplifier circuit includes:
the input circuit is connected with the amplitude modulation circuit and is used for accessing the first voltage driving signal;
a pre-stage bias circuit connected to the input circuit, the pre-stage bias circuit configured to generate a pre-stage bias current;
the bias voltage circuit is connected with the preceding stage bias circuit and is used for generating power amplifier bias voltage according to the preceding stage bias current;
the bias current circuit is connected with the preceding stage bias circuit and is used for generating power amplifier bias current according to the preceding stage bias current; and
and the power amplification sub-circuits are connected in parallel and used for amplifying the output power of the first voltage driving signal according to the power amplification bias voltage and the power amplification bias current.
In one embodiment, the input circuit includes a first transistor, a base of the first transistor is connected to the first voltage driving signal, and a first conducting terminal and a second conducting terminal of the first transistor are respectively connected to the pre-stage bias circuit.
In one embodiment, the pre-stage bias circuit includes: a second transistor, a third transistor, a fourth transistor, and a fifth transistor, wherein a first conduction terminal of the second transistor and a first conduction terminal of the third transistor are connected to a positive power supply terminal, a base of the second transistor and a base of the third transistor are connected to a first conduction terminal of the first transistor, a second conduction terminal of the second transistor and a second conduction terminal of the third transistor are connected in common to a first output terminal of the preceding stage bias circuit, a first output terminal of the preceding stage bias circuit is connected to the bias voltage circuit and the bias current circuit, a second conduction terminal of the fourth transistor and a second conduction terminal of the fifth transistor are connected in common to a second output terminal of the preceding stage bias circuit, and a second output terminal of the preceding stage bias circuit is connected to the bias voltage circuit and the bias current circuit, the base electrode of the fourth transistor and the base electrode of the fifth transistor are connected with the second conduction end of the first transistor, and the first conduction end of the second transistor and the first conduction end of the third transistor are connected to the negative pole of a power supply in a shared mode.
In one embodiment, the bias voltage circuit includes: the first end of the first resistor, the first end of the third resistor and the base of the sixth transistor are connected in common, the second end of the third resistor and the first end of the adjustable resistor are connected, the second end of the adjustable resistor, the second end of the sixth transistor and the first end of the fourth resistor are connected in common, the second end of the second resistor and the first end of the third resistor are connected in common, the second end of the adjustable resistor and the first end of the adjustable resistor are connected in common, the second end of the second resistor and the first end of the third resistor are connected in common, and the second end of the second resistor and the first end of the third resistor are connected in common.
In one embodiment, the bias current circuit includes: the base of the seventh transistor is connected with the first output end of the preceding stage bias circuit, the base of the eighth transistor is connected with the second output end of the preceding stage bias circuit, the first conducting end of the seventh transistor is connected with the positive electrode of a power supply, the first conducting end of the eighth transistor is connected with the negative electrode of the power supply, and the second conducting end of the seventh transistor and the second conducting end of the eighth transistor are connected as the output end of the bias current circuit.
In one embodiment, the power amplification sub-circuit comprises: the first conduction end of the ninth transistor is connected with the positive electrode of the power supply, the second conduction end of the ninth transistor and the second conduction end of the tenth transistor are connected with the output end of the power amplification circuit in a shared mode, the first conduction end of the tenth transistor is connected with the negative electrode of the power supply, the base electrode of the ninth transistor is connected with the second conduction end of the seventh transistor, and the base electrode of the tenth transistor is connected with the second conduction end of the eighth transistor.
In one embodiment, the driving control circuit further comprises a communication circuit, the communication circuit is connected with the main control circuit, and the main control circuit communicates with an external device through the communication circuit.
A second aspect of an embodiment of the present application provides an ultrasonic control system for a lithium battery, including:
an ultrasonic generator; and
the drive control circuit according to the first aspect of the embodiments of the present application, the drive control circuit being connected to the ultrasonic generator.
The drive control circuit realizes signal conversion and power amplification of the control signal into a second voltage drive signal to the ultrasonic generator by adopting the main control circuit, the amplitude modulation circuit, the power amplification circuit and the output feedback circuit, and timely adjusts the size of the control signal by acquiring the second voltage drive signal accessed by the ultrasonic generator so as to form closed-loop drive control on the ultrasonic generator and realize automatic calibration; the output power is greatly amplified through the power amplifier circuit, and the heating problem is reduced; the drive control circuit solves the problems that the traditional ultrasonic control system for the lithium battery tab generates heat seriously and cannot realize the automatic calibration function.
Drawings
Fig. 1 is a circuit diagram of a driving control circuit according to an embodiment of the present disclosure;
FIG. 2 is an exemplary circuit schematic of an amplitude modulation circuit of the drive control circuit shown in FIG. 1;
FIG. 3 is a circuit diagram of an output feedback circuit in the driving control circuit shown in FIG. 1;
FIG. 4 is another circuit diagram of an output feedback circuit in the driving control circuit shown in FIG. 3;
FIG. 5 is a schematic diagram of an exemplary circuit of a power amplifier circuit in the drive control circuit shown in FIG. 1;
fig. 6 is another circuit diagram of the driving control circuit shown in fig. 1.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Fig. 1 shows a circuit schematic diagram of a drive control circuit 10 provided in a first aspect of an embodiment of the present application, and for convenience of description, only the parts related to the embodiment are shown, and detailed as follows:
the drive control circuit 10 in this embodiment is connected to the ultrasonic generator, and the drive control circuit 10 includes: the main control circuit 100, the amplitude modulation circuit 200, the power amplifier circuit 300 and the output feedback circuit 400, wherein the input end of the amplitude modulation circuit 200 is connected with the main control circuit 100, the output end of the amplitude modulation circuit 200 is connected with the input end of the power amplifier circuit 300, the output end of the power amplifier circuit 300 is connected with the input end of the output feedback circuit 400 and the ultrasonic generator, and the output end of the output feedback circuit 400 is connected with the control circuit. The main control circuit 100 is used for outputting a control signal; the amplitude modulation circuit 200 is used for generating a first voltage driving signal according to the control signal; the power amplifier circuit 300 is configured to amplify the first voltage driving signal to generate a second voltage driving signal, and output the second voltage driving signal to the ultrasonic generator 20; the output feedback circuit 400 is configured to collect the second voltage driving signal and generate an output feedback signal to the main control circuit 100; the main control circuit 100 adjusts the magnitude of the control signal according to the output feedback signal, so that the voltage amplitude of the second voltage driving signal is the target voltage amplitude.
It is understood that the master control circuit 100 may be formed by a microprocessor. The amplitude modulation circuit 200 may be composed of a digital-to-analog conversion chip, a potentiometer, an operational amplifier, and the like. The power amplifier circuit 300 may be formed of a plurality of power amplifiers. The output feedback circuit 400 may be composed of a sampling resistor, a voltage sensor, a current sensor, a zero-crossing detection circuit, and the like. The control signal may be a set of digital control signals. The feedback signal can be one or more of a current feedback signal, a voltage feedback signal and a zero-crossing point signal.
In the driving control circuit 10 of this embodiment, by using the main control circuit 100, the amplitude modulation circuit 200, the power amplification circuit 300, and the output feedback circuit 400, signal conversion and power amplification of the control signal are realized into the second voltage driving signal to the ultrasonic generator 20, and by collecting the second voltage driving signal accessed by the ultrasonic generator 20, the magnitude of the control signal is adjusted in time, so as to form closed-loop driving control on the ultrasonic generator 20, and realize automatic calibration; the output power is greatly amplified through the power amplifier circuit 300, and the heating problem is reduced; the drive control circuit 10 solves the problems that the traditional ultrasonic control system for the lithium battery tab generates heat seriously and cannot realize the automatic calibration function.
Referring to fig. 2, in one embodiment, an amplitude modulation circuit 200 includes: the digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U1, a potentiometer U3, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, an operational amplifier U2A and an operational amplifier U2B.
the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14 and the operational amplifier U2A form a differential amplification circuit, differential analog signals output by pins 21 and 22 of the digital-to-analog conversion chip U1 are converted into single-ended analog quantity signals, the single-ended analog quantity signals are output by a pin 1 of the operational amplifier U2A, and a first pin of the operational amplifier U2A outputs signals to a pin 7 of the potentiometer U3;
the 1 st, 2 nd and 3 rd of the potentiometer U3 receive the master control signal to process the single-ended analog quantity signal and output the single-ended analog quantity signal through the 8 th pin, the 8 th pin of the U3 outputs the signal to the 5 th pin of the operational amplifier U2B, the signal is output by the pins 6 and 7 of the operational amplifier U2B through the inside of the operational amplifier, and the operational amplifier U2B outputs a first voltage driving signal.
It can be understood that the main control circuit 100 outputs the control signal to the digital-to-analog conversion chip U1 through digital transmission data, the analog quantity of the first voltage amplitude range of the digital-to-analog conversion chip U1, the potentiometer U3 in cooperation with the operational amplifier U2A and the operational amplifier U2B can amplify the analog quantity to the second voltage amplitude range, for example, the digital-to-analog conversion chip U1 outputs 0 to 3 volts of analog quantity, and the digital potentiometer in cooperation with the operational amplifier can amplify 0 to 3 volts of analog quantity to 0 to 5 volts.
Referring to fig. 3, in one embodiment, the output feedback circuit 400 includes: the power amplifier circuit comprises a voltage acquisition circuit 410, a voltage zero crossing point judgment circuit 420, a current acquisition circuit 430 and a current zero crossing point judgment circuit 440, wherein the voltage acquisition circuit 410 is connected with the output end of the power amplifier circuit 300 and the main control circuit 100, the voltage zero crossing point judgment circuit 420 is connected with the voltage acquisition circuit 410 and the main control circuit 100, the current acquisition circuit 430 is connected with the output end of the power amplifier circuit 300 and the main control circuit 100, and the current zero crossing point judgment circuit 440 is connected with the current acquisition circuit 430 and the main control circuit 100. The voltage collecting circuit 410 is used for collecting the voltage of the second voltage driving signal and generating a voltage signal. The voltage zero crossing point judgment circuit 420 is configured to output a voltage zero crossing point time to the main control circuit 100 according to the voltage signal. The current collecting circuit 430 is used for collecting the current of the second voltage driving signal and generating a current signal. The current zero crossing point determining circuit 440 is configured to output a current phase to the main control circuit 100 according to the current signal.
It is understood that the voltage acquisition circuit 410 may be formed of a voltage acquisition chip. The voltage zero-crossing point judging circuit 420 may be formed of a voltage zero-crossing point detecting chip. The current collecting circuit 430 may be constituted by a current collecting chip. The current zero-crossing point judgment circuit 440 may be formed of a current zero-crossing point detection chip.
Optionally, an operation process of the output feedback circuit 400 in this embodiment is as follows: two terminals of the ultrasonic generator 20 are connected to the output end of the power amplifier circuit 300, and the voltage acquisition circuit 410 acquires the second voltage driving signal at the output end of the power amplifier circuit 300 in real time, which is equivalent to acquiring the voltages at two ends of the ultrasonic generator 20. The voltage signal collected by the voltage collecting circuit 410 is a sinusoidal signal, the positive selection signal has positive and negative, the voltage zero crossing point judging circuit 420 compares the voltage signal with the zero point of the circuit, and after the positive selection signal is compared with the zero point, when the positive selection signal is output by a positive-to-negative circuit and becomes lower in level from high level or is output by a negative-to-positive circuit and becomes higher in level from low level, the voltage zero crossing point time is tracked in real time; the current collection circuit 430 collects real-time current; the current zero crossing point judging circuit 440 accurately compares sine waves of current and voltage according to the zero crossing time of the sine signals, and obtains a phase difference of the two waveforms through the two waveforms, wherein the phase difference is a key factor for calculating parameters of the ultrasonic transducer, so that the current phase is acquired in real time; the main control circuit 100 performs phase judgment, phase difference processing and impedance calculation according to the collected voltage signal, voltage zero crossing point time, current signal and current phase, and adjusts the amplitude of voltage amplitude modulation according to the amplitude of the current signal and the voltage signal so as to achieve the purpose of closed-loop control.
Optionally, in an embodiment, referring to fig. 4, the output feedback circuit 400 further includes an amplifying circuit 450, the amplifying circuit 450 is connected in series between the current collecting circuit 430 and the main control circuit 100, and the amplifying circuit 450 is configured to amplify the current signal and output the amplified current signal to the main control circuit 100.
Referring to fig. 5, in an embodiment, the power amplifier circuit 300 includes: the input circuit 310 is connected with the amplitude modulation circuit 200, the pre-stage bias circuit 320 is connected with the input circuit 310, the bias voltage circuit 330 and the bias current circuit 340, the multi-group power amplification sub-circuit 350 is connected in parallel, and the multi-group power amplification sub-circuit 350 is connected with the bias current circuit 340 and the bias voltage circuit 330. The input circuit 310 is used for receiving a first voltage driving signal; the pre-stage bias circuit 320 is used for generating a pre-stage bias current; the bias voltage circuit 330 is used for generating a power amplifier bias voltage according to the preceding stage bias current; the bias current circuit 340 is configured to generate a power amplifier bias current according to the preceding stage bias current; the plurality of sets of power amplification sub-circuits 350 amplify the output power of the first voltage driving signal according to the power amplifier bias voltage and the power amplifier bias current.
Referring to fig. 5, in an embodiment, the input circuit 310 includes a first transistor Q1, a base of the first transistor Q1 is connected to the first voltage driving signal, and a first conducting terminal and a second conducting terminal of the first transistor Q1 are respectively connected to the pre-stage bias circuit 320. Wherein VIN in fig. 5 is a first voltage driving signal, and VOUT is a second voltage driving signal.
Referring to fig. 5, in one embodiment, the pre-stage bias circuit 320 includes: a second transistor Q2, a third transistor Q3, a fourth transistor Q4, and a fifth transistor Q5, a first conduction terminal of the second transistor Q2 and a first conduction terminal of the third transistor Q3 are connected to the power supply positive electrode VCC +, a base of the second transistor Q2 and a base of the third transistor Q3 and a first conduction terminal of the first transistor Q1 are connected, a second conduction terminal of the second transistor Q2 and a second conduction terminal of the third transistor Q3 are connected in common to a first output terminal of the preceding stage bias circuit 320, a first output terminal of the preceding stage bias circuit 320 is connected to the bias voltage circuit 330 and the bias current circuit 340, a second conduction terminal of the fourth transistor Q4 and a second conduction terminal of the fifth transistor Q5 are connected in common to a second output terminal of the preceding stage bias circuit 320, a second output terminal of the preceding stage bias circuit 320 is connected to the bias voltage circuit 330 and the bias current circuit 340, a base of the fourth transistor Q4 and a base of the fifth transistor Q5 and a second conduction terminal of the transistor Q1 are connected to the first conduction terminal of the preceding stage bias circuit 320, the first conduction terminal of the second transistor Q2 and the first conduction terminal of the third transistor Q3 are commonly connected to the power supply negative terminal VCC-.
Referring to fig. 5, in one embodiment, the bias voltage circuit 330 includes: the first end of the first resistor R1, the first end of the second resistor R2 and the first conducting end of the sixth transistor Q6 are commonly connected to the first output end of the preceding stage bias circuit 320, the second end of the first resistor R1, the first end of the third resistor R3 and the base of the sixth transistor Q6 are commonly connected, the second end of the third resistor R3 and the first end of the adjustable resistor R5 are connected, the second end of the adjustable resistor R5, the second conducting end of the sixth transistor Q6 and the first end of the fourth resistor R4 are commonly connected to the second output end of the preceding stage bias circuit 320, and the second end of the second resistor R2 and the first end of the third resistor R3 are commonly connected to the multiple groups of power amplifier sub-circuits 350.
It will be appreciated that the adjustable resistor R5 can be manually adjusted to adjust the bias voltage of the output and to adjust the midpoint of the output.
Referring to fig. 5, in one embodiment, the bias current circuit 340 includes: a seventh transistor Q7 and an eighth transistor Q8, wherein the base of the seventh transistor Q7 is connected to the first output terminal of the pre-stage bias circuit 320, the base of the eighth transistor Q8 is connected to the second output terminal of the pre-stage bias circuit 320, the first turn-on terminal of the seventh transistor Q7 is connected to the positive power supply terminal VCC +, the first turn-on terminal of the eighth transistor Q8 is connected to the negative power supply terminal VCC-, and the second turn-on terminal of the seventh transistor Q7 and the second turn-on terminal of the eighth transistor Q8 are connected as the output terminal of the bias current circuit 340.
Referring to fig. 5, in one embodiment, the power amplifier sub-circuit 350 includes: the power amplifier circuit comprises a ninth transistor Q9 and a tenth transistor Q10, wherein a first conduction end of the ninth transistor Q9 is connected with a power supply positive electrode VCC +, a second conduction end of the ninth transistor Q9 and a second conduction end of the tenth transistor Q10 are connected with an output end of the power amplifier circuit 300 in common, a first conduction end of the tenth transistor Q10 is connected with a power supply negative electrode VCC-, a base of the ninth transistor Q9 is connected with a second conduction end of the seventh transistor Q7, and a base of the tenth transistor Q10 is connected with a second conduction end of the eighth transistor Q8.
Referring to fig. 6, in an embodiment, the driving control circuit 10 further includes a communication circuit 500, the communication circuit 500 is connected to the main control circuit 100, and the main control circuit 100 communicates with an external device through the communication circuit 500.
It is understood that the communication circuit 500 may be formed of an ethernet communication module or a WiFi communication module, etc. The external device may be a terminal device such as a computer, and data set by the external device may be transmitted to the main control circuit 100 in real time through the communication module.
It can be understood that the conventional ultrasonic control system for the tab of the lithium battery has the problems of unstable communication and low real-time performance, and the drive control circuit 10 in this embodiment ensures the reliability of real-time communication and communication with the external device by adding the communication circuit 500, thereby solving the problems of unstable communication and low real-time performance of the conventional ultrasonic control system for the tab of the lithium battery.
A second aspect of an embodiment of the present application provides an ultrasonic control system for a lithium battery, including: an ultrasonic generator 20; and the drive control circuit 10 as the first aspect of the embodiment of the present application, the drive control circuit 10 and the ultrasonic generator 20 are connected.
It can be understood that the lithium battery ultrasonic control system can further comprise: the driving control circuit 10 includes an AC-to-DC power supply module, a DCDC power conversion module and a regulated power supply module, where the AC-to-DC power supply module, the DCDC power conversion module and the regulated power supply module are used to provide stable voltage for the driving control circuit.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A drive control circuit connected to an ultrasonic generator, the drive control circuit comprising:
the master control circuit is used for outputting a control signal;
the amplitude modulation circuit is connected with the main control circuit and is used for generating a first voltage driving signal according to the control signal;
the power amplifier circuit is connected with the amplitude modulation circuit and is used for amplifying the first voltage driving signal to generate a second voltage driving signal and outputting the second voltage driving signal to the ultrasonic generator; and
the output feedback circuit is respectively connected with the power amplifier circuit and the main control circuit, and is used for acquiring the second voltage driving signal and generating an output feedback signal to the main control circuit;
and the main control circuit adjusts the magnitude of the control signal according to the output feedback signal so as to enable the voltage amplitude of the second voltage driving signal to be a target voltage amplitude.
2. The drive control circuit of claim 1, wherein the output feedback circuit comprises:
the voltage acquisition circuit is connected with the output end of the power amplification circuit and the main control circuit and is used for acquiring the voltage of the second voltage driving signal and generating a voltage signal;
the voltage zero crossing point judging circuit is connected with the voltage acquisition circuit and the main control circuit and is used for outputting voltage zero crossing point time to the main control circuit according to the voltage signal;
the current acquisition circuit is connected with the output end of the power amplification circuit and the main control circuit and is used for acquiring the current of the second voltage driving signal and generating a current signal; and
the current zero crossing point judging circuit is connected with the current collecting circuit and the main control circuit and is used for outputting a current phase to the main control circuit according to the current signal.
3. The drive control circuit of claim 1, wherein the power amplifier circuit comprises:
the input circuit is connected with the amplitude modulation circuit and is used for accessing the first voltage driving signal;
a pre-stage bias circuit connected to the input circuit, the pre-stage bias circuit configured to generate a pre-stage bias current;
the bias voltage circuit is connected with the preceding stage bias circuit and is used for generating power amplifier bias voltage according to the preceding stage bias current;
the bias current circuit is connected with the preceding stage bias circuit and is used for generating power amplifier bias current according to the preceding stage bias current; and
and the power amplification sub-circuits are connected in parallel and used for amplifying the output power of the first voltage driving signal according to the power amplification bias voltage and the power amplification bias current.
4. The driving control circuit as claimed in claim 3, wherein the input circuit comprises a first transistor, a base of the first transistor is connected to the first voltage driving signal, and a first conducting terminal and a second conducting terminal of the first transistor are respectively connected to the pre-stage bias circuit.
5. The drive control circuit of claim 4, wherein the pre-stage bias circuit comprises: a second transistor, a third transistor, a fourth transistor, and a fifth transistor, wherein a first conduction terminal of the second transistor and a first conduction terminal of the third transistor are connected to a positive power supply terminal, a base of the second transistor and a base of the third transistor are connected to a first conduction terminal of the first transistor, a second conduction terminal of the second transistor and a second conduction terminal of the third transistor are connected in common to a first output terminal of the preceding stage bias circuit, a first output terminal of the preceding stage bias circuit is connected to the bias voltage circuit and the bias current circuit, a second conduction terminal of the fourth transistor and a second conduction terminal of the fifth transistor are connected in common to a second output terminal of the preceding stage bias circuit, and a second output terminal of the preceding stage bias circuit is connected to the bias voltage circuit and the bias current circuit, the base electrode of the fourth transistor and the base electrode of the fifth transistor are connected with the second conduction end of the first transistor, and the first conduction end of the second transistor and the first conduction end of the third transistor are connected to the negative pole of a power supply in a shared mode.
6. The drive control circuit of claim 3, wherein the bias voltage circuit comprises: the first end of the first resistor, the first end of the third resistor and the base of the sixth transistor are connected in common, the second end of the third resistor and the first end of the adjustable resistor are connected, the second end of the adjustable resistor, the second end of the sixth transistor and the first end of the fourth resistor are connected in common, the second end of the second resistor and the first end of the third resistor are connected in common, the second end of the adjustable resistor and the first end of the adjustable resistor are connected in common, the second end of the second resistor and the first end of the third resistor are connected in common, and the second end of the second resistor and the first end of the third resistor are connected in common.
7. The drive control circuit of claim 3, wherein the bias current circuit comprises: the base of the seventh transistor is connected with the first output end of the preceding stage bias circuit, the base of the eighth transistor is connected with the second output end of the preceding stage bias circuit, the first conducting end of the seventh transistor is connected with the positive electrode of a power supply, the first conducting end of the eighth transistor is connected with the negative electrode of the power supply, and the second conducting end of the seventh transistor and the second conducting end of the eighth transistor are connected as the output end of the bias current circuit.
8. The drive control circuit of claim 7, wherein the power amplification sub-circuit comprises: the first conduction end of the ninth transistor is connected with the positive electrode of the power supply, the second conduction end of the ninth transistor and the second conduction end of the tenth transistor are connected with the output end of the power amplification circuit in a shared mode, the first conduction end of the tenth transistor is connected with the negative electrode of the power supply, the base electrode of the ninth transistor is connected with the second conduction end of the seventh transistor, and the base electrode of the tenth transistor is connected with the second conduction end of the eighth transistor.
9. The drive control circuit according to claim 1, further comprising a communication circuit connected to the master circuit, the master circuit communicating with an external device through the communication circuit.
10. An ultrasonic control system for a lithium battery, comprising:
an ultrasonic generator; and
the drive control circuit according to any one of claims 1 to 9, wherein the drive control circuit is connected to the ultrasonic generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120763636.7U CN214670158U (en) | 2021-04-14 | 2021-04-14 | Drive control circuit and lithium battery ultrasonic control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120763636.7U CN214670158U (en) | 2021-04-14 | 2021-04-14 | Drive control circuit and lithium battery ultrasonic control system |
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| CN214670158U true CN214670158U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120763636.7U Active CN214670158U (en) | 2021-04-14 | 2021-04-14 | Drive control circuit and lithium battery ultrasonic control system |
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| Country | Link |
|---|---|
| CN (1) | CN214670158U (en) |
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2021
- 2021-04-14 CN CN202120763636.7U patent/CN214670158U/en active Active
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