Charging module ultra-low power consumption auxiliary power supply circuit and charging module
By designing an ultra-low power auxiliary power circuit in the charging module, using components such as transformer module, DC/DC power module, etc., the working state of the switch tube and control chip is cleverly controlled, and the problem of high power consumption of the auxiliary power in the standby state of the charging module is solved, achieving significant power consumption reduction and energy saving effects.
Patent Information
- Application Number
- CN202422368038.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing charging modules consume a large power supply during standby state, resulting in high overall standby power consumption, increasing the cost of use and not meeting the energy saving and emission reduction requirements.
Design an ultra-low power consumption auxiliary power circuit for charging modules. Through the combination of transformer module, DC/DC power module, switching control module, switching module, power supply start module, switch tube control module and switch tube, the working status of the switch tube and control chip is cleverly controlled, significantly reducing the power consumption of the auxiliary power circuit.
It realizes the standby power consumption of the charging module from the original 20+W to below 3W, which significantly reduces the power consumption of the auxiliary power circuit and meets the requirements of energy conservation and emission reduction.
Smart Images
Figure CN222953934U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of charging modules of charging piles, and more specifically, to an ultra-low power consumption auxiliary power supply circuit of a charging module, and a charging module comprising the ultra-low power consumption auxiliary power supply circuit of the charging module. Background Art
[0002] With the rapid development of the new energy vehicle industry, the demand for charging piles is increasing day by day. The charging pile includes multiple charging modules and is in standby mode when not in use. When the charging pile is in standby mode, the internal charging module of the charging pile is also in standby mode. However, the auxiliary power supply, communication circuit, and panel inside the charging module in standby mode are all in working state, so the standby power consumption is relatively large. A single module generally has a power consumption of more than ten watts to more than twenty watts. Long-term use will result in a large amount of accumulated power loss, which increases the cost of use and does not meet the requirements of energy conservation and emission reduction. Since the standby power consumption is mainly generated by the auxiliary power supply when the charging module is in standby mode, reducing the power consumption of the auxiliary power supply can reduce the standby power consumption.
[0003] In order to solve this technical problem, the applicant has designed a low-power auxiliary power supply circuit for a charging module. Figure 1 The low-power auxiliary power circuit of the charging module includes a control chip 310, an adjustment resistor R2, an adjustment capacitor C3 and a switch tube Q1. By adjusting the resistance value and the capacitance value of the adjustment resistor R2 and the adjustment capacitor C3, the switch tube control signal output by the control chip 310 can be changed, thereby changing the switching frequency of the switch tube Q1, thereby reducing the turn-on and turn-off losses of the switch tube Q1, thereby reducing the power consumption of the auxiliary power circuit and reducing the standby power consumption of the charging module.
[0004] However, subsequent experiments have shown that the low-power auxiliary power circuit of the charging module can usually only reduce the original power consumption of the charging module from 20+W to less than 6W, which is also a considerable power consumption for large-scale charging stations. Utility Model Content
[0005] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, a charging module ultra-low power consumption auxiliary power supply circuit and a charging module including the charging module ultra-low power consumption auxiliary power supply circuit are provided, which can further significantly reduce the auxiliary power consumption, and thus significantly reduce the standby power consumption of the charging module.
[0006] The technical solution adopted by the utility model to solve the technical problem is: constructing an ultra-low power consumption auxiliary power supply circuit of a charging module, including a transformer module, an output module arranged on the secondary side of the transformer module, a DC / DC power supply module arranged on the primary side of the transformer module, a switching control module, a switching module, a power supply start module, a switch tube control module and a switch tube;
[0007] The switch tube control module includes a control chip; the power supply end of the control chip is connected to the power supply startup module, and the signal output end of the control chip is connected to the control end of the switch tube; the first end of the switch tube is connected to the second end of the primary winding of the transformer module, the first end of the primary winding of the transformer module is connected to the input voltage of the auxiliary power supply, and the second end of the switch tube is grounded; the DC / DC power supply module is connected between the input voltage of the auxiliary power supply and the ground and supplies power to the switching control module;
[0008] The switching module is connected between the input voltage of the auxiliary power supply, the power supply start module and the DC / DC power supply module, and the switching control module is used to control the switching module to control the auxiliary power supply to supply power to the switch tube control module or stop supplying power to the switch tube control module; or
[0009] The switching module is connected between the ground terminal and the compensation terminal of the control chip; the switching control module is used to control the switching of the switching module to control the control chip to start or stop outputting a switch tube control signal to the switch tube.
[0010] In the ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model, the switching module includes a relay, a first end of the relay switch of the relay is connected to the ground end of the control chip, and a second end is connected to the compensation end of the control chip, and a first end and a second end of the coil of the relay are respectively connected to the switching control module;
[0011] The switching control module controls the coil of the relay to be energized to close the relay switch, thereby causing the control chip to stop outputting the switch control signal to the switch tube;
[0012] The switching control module controls the coil of the relay to lose power to disconnect the relay switch, thereby causing the control chip to start outputting the switch tube control signal to the switch tube.
[0013] In the ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model, the switching module includes a switching switch tube and a switching resistor;
[0014] The control end of the switching switch tube is connected to the switching control module, the first end is connected to the compensation end of the control chip via the switching resistor, and the second end is connected to the ground end of the control chip;
[0015] The switching control module controls the switching switch tube to be turned on, so that the control chip stops outputting the switch tube control signal to the switch tube; or the switching control module controls the switching switch tube to be turned off, so that the control chip starts outputting the switch tube control signal to the switch tube.
[0016] In the ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model, the transformer module includes a first primary winding and a second primary winding;
[0017] The power supply startup module includes a startup unit and a power supply unit; the startup unit includes a startup resistor, a startup capacitor, and a voltage regulator diode; the power supply unit includes a first power supply capacitor, a second power supply capacitor, a power supply diode and a power supply resistor;
[0018] The anode of the voltage stabilizing diode is grounded, the cathode is connected to the first end of the starting resistor, the first end of the starting capacitor and the power supply end of the control chip, the second end of the starting resistor is connected to the input voltage of the auxiliary power supply, and the second end of the starting capacitor is grounded;
[0019] The anode of the power supply diode and the first end of the power supply resistor are connected to the second end of the second primary winding, the first end of the second primary winding is grounded, the cathode of the power supply diode is connected to the power supply end of the control chip, the second end of the power supply resistor is connected to the power supply end of the control chip via the first power supply capacitor, and the second power supply capacitor is connected between the power supply end of the control chip and the first end of the second primary winding.
[0020] In the ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model, the switching module includes a relay, the moving contact of the single-pole double-throw switch of the relay is connected to the input voltage of the auxiliary power supply, the first static contact is connected to the DC / DC power supply module, and the second static contact is connected to the power supply start module; the first end and the second end of the coil of the relay are respectively connected to the switching control module;
[0021] The switching control module controls the coil of the relay to be energized or de-energized so that the moving contact of the single-pole double-throw switch of the relay is connected to the first static contact or the second static contact;
[0022] When the moving contact of the single-pole double-throw switch of the relay is connected to the first static contact, the auxiliary power supply stops supplying power to the switch tube control module; when the moving contact of the single-pole double-throw switch of the relay is connected to the second static contact, the auxiliary power supply supplies power to the switch tube control module.
[0023] In the ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model, the transformer module includes a first primary winding and a second primary winding;
[0024] The power supply startup module includes a startup unit and a power supply unit; the startup unit includes a startup resistor, a startup capacitor, and a voltage regulator diode; the power supply unit includes a first power supply capacitor, a second power supply capacitor, a power supply diode and a power supply resistor;
[0025] The anode of the voltage stabilizing diode is grounded, and the cathode is connected to the first end of the starting resistor, the first end of the starting capacitor and the power supply end of the control chip; the second end of the starting resistor is connected to the second static contact of the single-pole double-throw switch of the relay; and the second end of the starting capacitor is grounded;
[0026] The anode of the power supply diode and the first end of the power supply resistor are connected to the second end of the second primary winding, the first end of the second primary winding is grounded, the cathode of the power supply diode is connected to the power supply end of the control chip, the second end of the power supply resistor is connected to the power supply end of the control chip via the first power supply capacitor, and the second power supply capacitor is connected between the power supply end of the control chip and the first end of the second primary winding.
[0027] In the ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model, the control chip includes a UCC28 series control chip and a UCC38 series control chip.
[0028] In the ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model, the switch tube control module further includes an adjustment resistor and an adjustment capacitor, the adjustment resistor is connected between the reference voltage terminal and the clock terminal of the control chip, and the adjustment capacitor is connected between the clock terminal and the ground terminal of the control chip.
[0029] The ultra-low power consumption auxiliary power supply circuit of the charging module described in the utility model further includes:
[0030] An absorption module, wherein the absorption module is connected between a first end of a primary winding of the transformer module, a second end of the primary winding and a first end of the switch tube;
[0031] A voltage sampling module, wherein the voltage sampling module is connected to a voltage sampling feedback terminal of the control chip;
[0032] A current sampling module is connected to a current sampling feedback terminal of the control chip.
[0033] Another technical solution adopted by the utility model to solve the technical problem is to construct a charging module, including the above-mentioned ultra-low power consumption auxiliary power supply circuit of the charging module.
[0034] The ultra-low power consumption auxiliary power supply circuit and charging module of the charging module implemented in the utility model, through clever circuit design, use a small number of electronic devices to shut down the control chip or control the control chip to stop outputting the switch tube control signal, thereby significantly reducing the switch tube loss, and further significantly reducing the power consumption of the auxiliary power supply circuit and the standby power consumption of the charging module. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:
[0036] Figure 1 It is a principle block diagram of a low-power auxiliary power supply circuit of an advanced charging module;
[0037] Figure 2 It is a principle block diagram of a preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model;
[0038] Figure 3 It is a circuit diagram of a preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model;
[0039] Figure 4 It is a circuit diagram of another preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model;
[0040] Figure 5 It is a circuit diagram of another preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model. DETAILED DESCRIPTION
[0041] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0042] Figure 2 This is a principle block diagram of a preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model. Figure 2As shown, the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model includes a transformer module 200, an output module 400 arranged on the secondary side of the transformer module 200, a DC / DC power supply module 700 arranged on the primary side of the transformer module 200, a switching control module 500, a switching module 600, a power supply start-up module 100, a switch tube control module 300 and a switch tube Q1.
[0043] like Figure 2 As shown, the transformer module 200 includes a transformer, the transformer includes a primary winding and a secondary winding, an output module 400 is connected to the secondary winding of the transformer, and the DC / DC power supply module 700, the switching control module 500, the switching module 600, the power supply startup module 100, the switch tube control module 300 and the switch tube Q1 are connected to the primary winding of the transformer. Of course, those skilled in the art know that the transformer module 200 can also include multiple secondary windings, and multiple output modules 400 are respectively connected to multiple secondary windings of the transformer module 200. The transformer module can also include at least two primary windings, one of which is used to construct the power supply startup module 100. Of course, in other preferred embodiments of the utility model, power supply startup modules 100 with other structures can also be used, which all fall within the protection scope of the utility model.
[0044] Further Figure 2 As shown, the switch tube control module 300 includes a control chip 310. In a preferred embodiment of the present invention, the control chip 310 includes a UCC28 series control chip 310 and a UCC38 series control chip 310. For example, the control chip 310 can be a UCC28C45 chip. The control end of the switch tube Q1 is connected to the signal output end OUT of the control chip 310, so as to receive the switch tube control signal. Preferably, as Figure 2 In the embodiment shown, the switch control module 300 may further include an adjustment resistor R2 and an adjustment capacitor C3. Figure 2As shown, the power supply terminal VDD of the control chip 310 is connected to the power supply startup module 100, the signal output terminal OUT of the control chip 310 is connected to the control terminal of the switch tube Q1, the first end of the switch tube Q1 is connected to the second end of the primary winding of the transformer module 200, the first end of the primary winding of the transformer module 200 is connected to the input voltage Vin of the auxiliary power supply, and the second end of the switch tube Q1 is grounded GND. The regulating resistor R2 is connected between the reference voltage terminal VREF and the clock terminal RT / CT of the control chip 310, the regulating capacitor C3 is connected between the clock terminal RT / CT and the ground terminal GND of the control chip 310, and the ground terminal GND of the control chip 310 is grounded. The resistance value and the capacitance value of the regulating resistor R2 and the regulating capacitor C3 are respectively adjustable to adjust the frequency of the switch tube control signal output by the signal output terminal OUT of the control chip 310, thereby controlling the switching frequency of the switch tube Q1, thereby reducing the turn-on and turn-off losses of the switch tube Q1, thereby reducing the power consumption of the auxiliary power supply circuit, and thereby reducing the standby power consumption of the charging module. Of course, in other preferred embodiments of the present invention, the resistor R2 and the capacitor C3 may also be selected values. Based on the discussion in the background technology, it can be seen that if only the values of the resistor R2 and the capacitor C3 are adjusted, the power consumption reduction is still limited.
[0045] Therefore, in this application, we further set up a DC / DC power module 700, a switching control module 500 and a switching module 600. The DC / DC power module 700 is connected between the input voltage Vin of the auxiliary power supply and the ground GND and supplies power to the switching control module 500.
[0046] In a preferred embodiment of the present invention, the switching module 600 is connected between the input voltage Vin of the auxiliary power supply, the power supply start module 100 and the DC / DC power supply module 700, and the switching control module 500 is used to control the switching of the switching module 600 to control the auxiliary power supply to supply power to the switch tube control module 300 or stop supplying power to the switch tube control module 300. In this embodiment, since the switching module 600 can be a relay or switch device powered by the DC / DC power supply module 700, it can be opened or closed under the control of the switching control module 500, thereby controlling the auxiliary power supply to supply power to the switch tube control module 300 or stop supplying power to the switch tube control module 300. Here, the switching control module 500 can be a corresponding relay or switch device drive circuit, and any known relay or switch device drive circuit in the art can be used to implement the present invention. The DC / DC power supply module 700 can be any suitable low-power DC / DC power supply module 700. In this way, since the auxiliary power supply will not supply power to the switch tube control module 300 at all, the switch tube Q1 will obviously not work. Therefore, compared with the frequency of controlling the switch tube Q1 in the prior art, the power consumption of the switch tube Q1 can be further reduced, and the auxiliary power consumption can be further significantly reduced, thereby significantly reducing the standby power consumption of the charging module. In the present utility model, the power consumption of the charging module, which was originally as high as 20+W, can be reduced to less than 3W.
[0047] In another preferred embodiment of the utility model, the switching module 600 is connected between the ground terminal GND and the compensation terminal COMP of the control chip 310; the switching control module 500 is used to control the switching of the switching module 600 to control the control chip 310 to start or stop outputting the switch control signal to the switch tube Q1. In this embodiment, similarly, the switching module 600 is a relay or switch device powered by the DC / DC power supply module 700, which can be opened or closed under the control of the switching control module 500, so as to short-circuit or disconnect the ground terminal GND and the compensation terminal COMP of the control chip 310. When the ground terminal GND and the compensation terminal COMP of the control chip 310 are short-circuited, the control chip 310 will not output the switch control signal to the switch tube Q1, so the switch tube Q1 will obviously not work. Therefore, compared with the frequency of controlling the switch tube Q1 in the prior art, the power consumption of the switch tube Q1 can be further reduced, and the auxiliary power consumption can be further significantly reduced, thereby significantly reducing the standby power consumption of the charging module. In the present invention, the power consumption of the charging module, which is originally as high as 20+W, can be reduced to less than 3W.
[0048] The ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model is implemented. Through clever circuit design, a small number of electronic devices are used to shut down the control chip or control the control chip to stop outputting the switch tube control signal, thereby significantly reducing the switch tube loss and further significantly reducing the power consumption of the auxiliary power supply circuit and the standby power consumption of the charging module.
[0049] Figure 3 FIG. 1 is a circuit diagram of a preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model. Figure 3 As shown, the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model includes a transformer module 200, an output module 400 arranged on the secondary side of the transformer module 200, a DC / DC power supply module 700 arranged on the primary side of the transformer module 200, a switching control module 500, a switching module 600, a power supply start-up module 100, a switch tube control module 300 and a switch tube Q1.
[0050] exist Figure 3 In the preferred embodiment shown, the transformer module 200 may further include two primary windings and multiple secondary windings, one primary winding is used to construct the power supply startup module 100, one primary winding is connected to the switch tube Q1, and multiple output modules 400 are respectively connected to multiple secondary windings of the transformer module 200. Figure 3 As shown, the switch tube Q1 is a MOS tube. Of course, in other preferred embodiments of the present invention, triodes, IGBT tubes, etc. can also be used, which all fall within the protection scope of the present invention.
[0051] exist Figure 3 In the preferred embodiment shown, the switch control module 300 includes a control chip 310, an adjustment resistor R2, an adjustment capacitor C3, a current limiting resistor R4, a pull-down resistor R5 and a capacitor C5. Figure 3 As shown, the control chip 310 can be a UCC28 series control chip and a UCC38 series control chip, and is preferably a UCC28C45 chip. The voltage sampling feedback terminal FB of the control chip 310 is connected to the voltage sampling module, the current sampling feedback terminal CS is connected to the current sampling module, the reference voltage terminal VREF and the clock terminal RT / CT are connected to the adjustment resistor R2 and the adjustment capacitor C3, and the ground terminal GND is grounded.
[0052] exist Figure 3In the preferred embodiment shown, the switching module 600 includes a relay REL1, a first end of the relay switch of the relay REL1 is connected to the ground terminal GND of the control chip 310, and a second end is connected to the compensation terminal COMP of the control chip 310, and a first end and a second end of the coil of the relay REL1 are respectively connected to the switching control module 500. Here, the switching control module 500 can adopt any known relay driving circuit, which is used to control the coil of the relay REL1 to be energized to close the relay switch when receiving a high-level signal (or a low-level signal). At this time, the ground terminal GND and the compensation terminal COMP of the control chip 310 are short-circuited, so that the signal output terminal OUT of the control chip 310 stops outputting the switch control signal to the switch tube Q1, and the switch tube Q1 stops working. The switching control module 500 is further used to control the coil of the relay REL1 to lose power to disconnect the relay switch when receiving a low-level signal (or a high-level signal). At this time, the ground terminal GND and the compensation terminal COMP of the control chip 310 are disconnected and short-circuited, so that the control chip 310 starts to output the switch control signal to the switch tube Q1. Through such a setting, when the charging module is on standby, the control chip 310 can be controlled to stop outputting the switch control signal to the switch tube Q1. When the charging module resumes normal operation, the control chip 310 starts to output the switch control signal to the switch tube Q1. Therefore, compared with the prior art, the power consumption of the switch tube Q1 can be further reduced, the power consumption of the auxiliary power supply can be further significantly reduced, and the standby power consumption of the charging module can be significantly reduced. In the utility model, the power consumption of the charging module, which was originally as high as 20+W, can be reduced to less than 3W.
[0053] Further, the current limiting resistor R4 is connected between the signal output terminal OUT of the control chip 310 and the gate of the MOS transistor Q1, the pull-down resistor R5 and the capacitor C5 are respectively connected between the gate and the source of the MOS transistor Q1, and the drain of the MOS transistor Q1 is connected to the second end of the first primary winding of the transformer module 200. The current limiting resistor R4, the pull-down resistor R5 and the capacitor C5 are provided to prevent parasitic current, high and low frequency interference and electrostatic breakdown. Of course, in a simplified embodiment of the present utility model, at least one of the current limiting resistor R4, the pull-down resistor R5 and the capacitor C5 can be omitted.
[0054] exist Figure 3In the preferred embodiment shown, the power supply startup module 100 includes a startup unit and a power supply unit. The startup unit includes a startup resistor R1, a startup capacitor C1 and a voltage regulator diode DZ1. The power supply unit includes a power supply capacitor C9, a power supply capacitor C8, a power supply diode D2 and a power supply resistor R11. The anode of the voltage regulator diode DZ1 is grounded GND, and the cathode is connected to the first end of the startup resistor R1, the first end of the startup capacitor C1 and the power supply terminal VDD of the control chip 310. The second end of the startup resistor R1 is connected to the input voltage Vin, and the second end of the startup capacitor C1 is grounded GND. The anode of the power supply diode D2 and the first end of the power supply resistor R11 are connected to the second end of the second primary winding of the transformer module 200, the first end of the second primary winding is grounded GND, the cathode of the power supply diode D2 is connected to the power supply terminal VDD of the control chip, the second end of the power supply resistor R11 is connected to the power supply terminal VDD of the control chip via the power supply capacitor C9, and the power supply capacitor C8 is connected between the power supply terminal VDD of the control chip and the first end of the second primary winding. By using the aforementioned startup unit and power supply unit, power can be taken from the primary side of the transformer module 200 , thereby providing a power supply voltage for the control chip 310 .
[0055] The voltage sampling module includes a voltage sampling resistor R9, a second voltage sampling resistor R10, a resistor R8 and a capacitor C7. The voltage sampling resistor R9 and the second voltage sampling resistor R10 are connected in series between the power supply terminal VDD and the ground of the control chip 310, and the voltage sampling feedback terminal FB of the control chip 310 is connected to the connection point of the voltage sampling resistor R9 and the second voltage sampling resistor R10. The resistor R8 and the capacitor C7 are connected in series between the voltage sampling feedback terminal FB and the compensation terminal COMP of the control chip 310. The current sampling module includes a current sampling resistor R6, a current sampling resistor R7 and a current sampling capacitor C6; the current sampling resistor R6 and the current sampling resistor R7 are connected in series between the current sampling feedback terminal CS and the ground of the control chip 310, and the current sampling capacitor C6 is also connected between the current sampling feedback terminal CS and the ground of the control chip 310. By setting the voltage sampling module and the current sampling module, the current and voltage signals of the primary side of the transformer module can be sampled, and the switch tube control signal can be adjusted based on the current and voltage signals, thereby preventing the switch tube from overcurrent or overvoltage.
[0056] exist Figure 3In the preferred embodiment shown, the ultra-low power consumption auxiliary power supply circuit of the charging module further includes an absorption module. The absorption module is connected between the first end of the first primary winding of the transformer module 200, the second end of the first primary winding and the gate of the MOS tube Q1. The absorption module includes an absorption resistor R3, an absorption capacitor C4 and an absorption diode D1. The first end of the absorption capacitor C4 and the first end of the absorption resistor R3 are both connected to the first end of the first primary winding of the transformer module 200, the second end of the absorption capacitor C4 and the second end of the absorption resistor R3 are both connected to the cathode of the absorption diode D1, and the anode of the absorption diode D1 is connected to the second end of the first primary winding of the transformer module 200 and the drain of the MOS tube Q1. The absorption module can remove the peak voltage generated by the leakage inductance of the transformer module, adjust the duty cycle of the MOS tube and prevent the hiccup mode.
[0057] Figure 4 This is a circuit diagram of another preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model. Figure 4 The embodiment shown and Figure 3 The embodiment shown is similar, and the only difference is that the switching module 600 includes a switching switch tube Q2 and a switching resistor R12. The switching control module 500 is a switch tube driving circuit. The control end of the switching switch tube Q2 is connected to the switching control module 500, the first end is connected to the compensation end COMP of the control chip 310 through the switching resistor R12, and the second end is connected to the ground end GND of the control chip 310. Here, the switching switch tube Q2 can be a MOS tube, an IGBT tube or a switch tube. When the switching control module 500 controls the switching switch tube Q2 to be turned on, the control chip 310 stops outputting the switch tube control signal to the switch tube Q1; or when the switching control module 500 controls the switching switch tube Q2 to be turned off, the control chip 310 outputs the switch tube control signal to the switch tube Q1. In this preferred embodiment, the switching control module 500 can use any known switch tube driving circuit in the art.
[0058] Figure 5 It is a circuit diagram of another preferred embodiment of the ultra-low power consumption auxiliary power supply circuit of the charging module of the utility model. Figure 5 The embodiment shown and Figure 3-4 The embodiment shown is similar, with the difference that, in this embodiment, the switching module 600 is connected between the input voltage Vin of the auxiliary power supply, the power supply start module 100 and the DC / DC power supply module 700, and the switching control module 500 is used to control the switching of the switching module 600 to control the auxiliary power supply to power the switch tube control module 300 or stop powering the switch tube control module 300.
[0059] Specifically, Figure 5 As shown, the switching module 600 includes a relay REL1, the moving contact of the single-pole double-throw switch of the relay REL1 is connected to the input voltage Vin of the auxiliary power supply, the first static contact is connected to the DC / DC power supply module 700, and the second static contact is connected to the power supply start module 100; the first end and the second end of the coil of the relay REL1 are respectively connected to the switching control module 500. The switching control module 500 controls the coil of the relay REL1 to be energized or de-energized so that the moving contact of the single-pole double-throw switch of the relay REL1 is connected to the first static contact or the second static contact; when the moving contact of the single-pole double-throw switch of the relay REL1 is connected to the first static contact, the auxiliary power supply stops supplying power to the switch tube control module 300; when the moving contact of the single-pole double-throw switch of the relay REL1 is connected to the second static contact, the auxiliary power supply supplies power to the switch tube control module 300. Of course, vice versa is also possible, that is, the switching control module 500 can also be configured to control the coil of the relay REL1 to be energized or de-energized so that the moving contact of the single-pole double-throw switch of the relay REL1 is connected to the second static contact or the first static contact, and the principle is similar.
[0060] exist Figure 5 In the preferred embodiment shown, the power supply startup module 100 also includes a startup unit and a power supply unit. The startup unit also includes a startup resistor R1, a startup capacitor C1 and a voltage regulator diode DZ1. The power supply unit also includes a power supply capacitor C9, a power supply capacitor C8, a power supply diode D2 and a power supply resistor R11. The anode of the voltage regulator diode DZ1 is grounded, and the cathode is connected to the first end of the startup resistor R1, the first end of the startup capacitor C1 and the power supply terminal VDD of the control chip 310. The second end of the startup resistor R1 is connected to the second static contact of the single-pole double-throw switch of the relay REL1, and the second end of the startup capacitor C1 is grounded. The anode of the power supply diode D2 and the first end of the power supply resistor R11 are connected to the second end of the second primary winding of the transformer module 200, the first end of the second primary winding is grounded GND, the cathode of the power supply diode D2 is connected to the power supply terminal VDD of the control chip, the second end of the power supply resistor R11 is connected to the power supply terminal VDD of the control chip via the power supply capacitor C9, and the power supply capacitor C8 is connected between the power supply terminal VDD of the control chip and the first end of the second primary winding. By using the aforementioned startup unit and power supply unit, power can be taken from the primary side of the transformer module 200, thereby providing a power supply voltage for the control chip 310.
[0061] A further preferred embodiment of the present invention also relates to a charging module, comprising any one of the aforementioned ultra-low power consumption auxiliary power supply circuits for the charging module. Those skilled in the art can construct the aforementioned charging module and realize its functions according to the teachings of the present invention and common knowledge in the art.
[0062] Although the present invention is described through specific embodiments, it should be understood by those skilled in the art that various changes and equivalent substitutions may be made to the present invention without departing from the scope of the present invention. In addition, various modifications may be made to the present invention for specific situations or materials without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but should include all implementation methods that fall within the scope of the claims of the present invention.
[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An ultra-low power consumption auxiliary power supply circuit for a charging module, characterized in that: It includes a transformer module, an output module arranged on the secondary side of the transformer module, a DC / DC power supply module, a switching control module, a switching module, a power supply start module, a switch tube control module and a switch tube arranged on the primary side of the transformer module; The switch tube control module includes a control chip; the power supply end of the control chip is connected to the power supply startup module, and the signal output end of the control chip is connected to the control end of the switch tube; the first end of the switch tube is connected to the second end of the primary winding of the transformer module, the first end of the primary winding of the transformer module is connected to the input voltage of the auxiliary power supply, and the second end of the switch tube is grounded; the DC / DC power supply module is connected between the input voltage of the auxiliary power supply and the ground and supplies power to the switching control module; The switching module is connected between the input voltage of the auxiliary power supply, the power supply start module and the DC / DC power supply module, and the switching control module is used to control the switching module to control the auxiliary power supply to supply power to the switch tube control module or stop supplying power to the switch tube control module; or The switching module is connected between the ground terminal and the compensation terminal of the control chip; the switching control module is used to control the switching of the switching module to control the control chip to start or stop outputting a switch tube control signal to the switch tube.
2. The ultra-low power consumption auxiliary power supply circuit of the charging module according to claim 1, characterized in that: The switching module comprises a relay, a first end of a relay switch of the relay is connected to a ground terminal of the control chip, a second end is connected to a compensation terminal of the control chip, and a first end and a second end of a coil of the relay are respectively connected to the switching control module; The switching control module controls the coil of the relay to be energized to close the relay switch, thereby causing the control chip to stop outputting the switch control signal to the switch tube; The switching control module controls the coil of the relay to lose power to disconnect the relay switch, thereby causing the control chip to start outputting the switch tube control signal to the switch tube.
3. The ultra-low power consumption auxiliary power supply circuit of the charging module according to claim 1, characterized in that: The switching module includes a switching switch tube and a switching resistor; The control end of the switching switch tube is connected to the switching control module, the first end is connected to the compensation end of the control chip via the switching resistor, and the second end is connected to the ground end of the control chip; The switching control module controls the switching switch tube to be turned on, so that the control chip stops outputting the switch tube control signal to the switch tube; or the switching control module controls the switching switch tube to be turned off, so that the control chip starts outputting the switch tube control signal to the switch tube.
4. The ultra-low power consumption auxiliary power supply circuit of the charging module according to claim 2 or 3, characterized in that: The transformer module comprises a first primary winding and a second primary winding; The power supply startup module includes a startup unit and a power supply unit; the startup unit includes a startup resistor, a startup capacitor, and a voltage regulator diode; the power supply unit includes a first power supply capacitor, a second power supply capacitor, a power supply diode and a power supply resistor; The anode of the voltage stabilizing diode is grounded, the cathode is connected to the first end of the starting resistor, the first end of the starting capacitor and the power supply end of the control chip, the second end of the starting resistor is connected to the input voltage of the auxiliary power supply, and the second end of the starting capacitor is grounded; The anode of the power supply diode and the first end of the power supply resistor are connected to the second end of the second primary winding, the first end of the second primary winding is grounded, the cathode of the power supply diode is connected to the power supply end of the control chip, the second end of the power supply resistor is connected to the power supply end of the control chip via the first power supply capacitor, and the second power supply capacitor is connected between the power supply end of the control chip and the first end of the second primary winding.
5. The ultra-low power consumption auxiliary power supply circuit of the charging module according to claim 1, characterized in that: The switching module comprises a relay, wherein a moving contact of a single-pole double-throw switch of the relay is connected to an input voltage of the auxiliary power supply, a first static contact is connected to the DC / DC power supply module, and a second static contact is connected to the power supply start module; a first end and a second end of the coil of the relay are respectively connected to the switching control module; The switching control module controls the coil of the relay to be energized or de-energized so that the moving contact of the single-pole double-throw switch of the relay is connected to the first static contact or the second static contact; When the moving contact of the single-pole double-throw switch of the relay is connected to the first static contact, the auxiliary power supply stops supplying power to the switch tube control module; when the moving contact of the single-pole double-throw switch of the relay is connected to the second static contact, the auxiliary power supply supplies power to the switch tube control module.
6. The ultra-low power consumption auxiliary power supply circuit of the charging module according to claim 5, characterized in that: The transformer module comprises a first primary winding and a second primary winding; The power supply startup module includes a startup unit and a power supply unit; the startup unit includes a startup resistor, a startup capacitor, and a voltage regulator diode; the power supply unit includes a first power supply capacitor, a second power supply capacitor, a power supply diode and a power supply resistor; The anode of the voltage stabilizing diode is grounded, and the cathode is connected to the first end of the starting resistor, the first end of the starting capacitor and the power supply end of the control chip; the second end of the starting resistor is connected to the second static contact of the single-pole double-throw switch of the relay; and the second end of the starting capacitor is grounded; The anode of the power supply diode and the first end of the power supply resistor are connected to the second end of the second primary winding, the first end of the second primary winding is grounded, the cathode of the power supply diode is connected to the power supply end of the control chip, the second end of the power supply resistor is connected to the power supply end of the control chip via the first power supply capacitor, and the second power supply capacitor is connected between the power supply end of the control chip and the first end of the second primary winding.
7. The ultra-low power consumption auxiliary power supply circuit of the charging module according to any one of claims 1-3, 5-6, characterized in that: The control chips include UCC28 series control chips and UCC38 series control chips.
8. The ultra-low power consumption auxiliary power supply circuit of the charging module according to any one of claims 1-3, 5-6, characterized in that: The switch tube control module further includes an adjustment resistor and an adjustment capacitor, wherein the adjustment resistor is connected between the reference voltage terminal and the clock terminal of the control chip, and the adjustment capacitor is connected between the clock terminal and the ground terminal of the control chip.
9. The ultra-low power consumption auxiliary power supply circuit of the charging module according to any one of claims 1-3, 5-6, characterized in that: Further including: An absorption module, wherein the absorption module is connected between a first end of a primary winding of the transformer module, a second end of the primary winding and a first end of the switch tube; A voltage sampling module, wherein the voltage sampling module is connected to a voltage sampling feedback terminal of the control chip; A current sampling module is connected to a current sampling feedback terminal of the control chip.
10. A charging module, characterized in that: It comprises an ultra-low power consumption auxiliary power supply circuit of a charging module according to any one of claims 1-9.