CN218868122U - 500W power adapter of vehicle-mounted power battery - Google Patents
500W power adapter of vehicle-mounted power battery Download PDFInfo
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- CN218868122U CN218868122U CN202223600997.3U CN202223600997U CN218868122U CN 218868122 U CN218868122 U CN 218868122U CN 202223600997 U CN202223600997 U CN 202223600997U CN 218868122 U CN218868122 U CN 218868122U
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Abstract
The utility model discloses a vehicle-mounted power battery 500W power adapter, its internal circuit include commercial power input circuit, EMI filter circuit, rectification filter circuit, PFC control circuit, LLC power conversion circuit, output synchronous rectifier circuit, LLC control circuit, constant voltage constant current control feedback output voltage stabilizing circuit, standby control circuit, battery charge control switch circuit and output filter circuit. The utility model discloses a power adapter adopts parallelly connected a plurality of high-power MOS pipes, realizes 500W's power output, adopts the double-circuit to turn off intelligent rectifier chip U3 control fast simultaneously, has reduced the use of current standard outside components and parts to the at utmost, LLC control circuit, and its integrated energy-conserving technique helps optimizing efficiency in whole operating voltage within range to realize higher efficiency, standby control circuit provides other modules or the required operating voltage of chip, guarantees whole circuit steady operation.
Description
Technical Field
The utility model belongs to the technical field of power adapter, specifically relate to a vehicle-mounted power battery 500W power adapter.
Background
The vehicle-mounted power battery is generally used for starting ignition of an engine or vehicle-mounted electronic equipment, and a power adapter for charging the vehicle-mounted power battery generally has the following problems: 1. the power is small, and the volume is large; 2. the charging speed is slow, the conversion efficiency of the power adapter is low, and the energy consumption of the power adapter is large.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned problem, provide an on-vehicle power battery 500W power adapter for power adapter realizes high-power output and charger small in size, and the charger charge rate is fast, and power adapter's conversion is efficient, and self energy consumption is little.
The utility model discloses a realize through following technical scheme:
the utility model provides a on-vehicle power battery 500W power adapter which characterized in that: the internal circuit of the power supply comprises a mains supply input circuit, an EMI filter circuit, a rectification filter circuit, a PFC control circuit, an LLC power conversion circuit, an output synchronous rectification circuit, an LLC control circuit, a constant voltage and constant current control feedback output voltage stabilizing circuit, a standby control circuit, a battery charging control switch circuit and an output filter circuit;
the commercial power input circuit is connected to the PFC control circuit sequentially through the EMI filter circuit and the rectification filter circuit, the rectification filter circuit comprises a rectification bridge and filter capacitors C33 and C39, the PFC control circuit comprises MOS (metal oxide semiconductor) tubes Q3, Q3A and Q8, drain electrodes of the MOS tubes Q3 and Q3A are connected to an anode output end of the PFC control circuit through a diode D21, and grid electrodes of the MOS tubes Q3 and Q3A are connected to a GATEP pin of a chip U3 of the LLC control circuit through resistors R46A and R46 respectively; the model of the chip U3 is HR1211; the source electrodes of the MOS tubes Q3, Q3A and Q8 are respectively grounded, the grid electrode of the MOS tube Q8 is connected with the GATEP pin of the chip U3, and the drain electrode of the MOS tube Q8 is respectively connected with the grid electrodes of the MOS tubes Q3 and Q3A through R64 and R64A; the negative output end of the PFC control circuit is grounded;
the LLC power conversion circuit comprises MOS (metal oxide semiconductor) tubes Q1 and Q2 and power transformers TR1 and TR2, wherein the drain electrode of the MOS tube Q1 is connected with the positive electrode output end of the PFC control circuit, the connection point of the source electrode of the MOS tube Q1 and the drain electrode of the MOS tube Q2 is connected to one end of a primary winding of the power transformer TR1, the other end of the primary winding of the power transformer TR1 is grounded through a capacitor C16, and the source electrode of the MOS tube Q2 is grounded; the grid of the MOS tube Q1 is connected to the HSG pin of the chip U3 through a parallel circuit formed by a diode D5 and a resistor R3, and the grid of the MOS tube Q2 is connected to the LSG pin of the chip U3 through a parallel circuit formed by a diode D10 and a resistor R9;
the other end of the secondary side first winding is respectively connected to the drain electrodes of MOS (metal oxide semiconductor) tubes Q4 and Q5 of the output synchronous rectification circuit; the other end of the secondary side second winding is respectively connected to the drain electrodes of MOS (metal oxide semiconductor) tubes Q6 and Q7 of the output synchronous rectification circuit; VG2 of a two-way quick turn-off intelligent rectifier chip U8 of the output synchronous rectification circuit is connected to the grids of MOS transistors Q6 and Q7 through resistors R18 and R24 respectively; VG1 of the chip U8 is connected to the grids of the MOS tubes Q4 and Q5 through resistors R10 and R16 respectively; the source electrodes of the MOS tubes Q4, Q5, Q6 and Q7 are respectively grounded; the model of the chip U8 is MP6924; the positive output end of the output synchronous rectification circuit is connected into a battery charging control switch circuit and then connected to an output filter circuit after passing through a control switch; the output filter circuit comprises an inductance coil L6, two input ends of the inductance coil L6, one end of the inductance coil L6 is connected with the positive output end of the output synchronous rectification circuit passing through the control switch of the battery charging control switch circuit, and the other end of the inductance coil L6 is grounded through a parallel circuit consisting of resistors R6 and R6A; a capacitor C43 is connected between the two output ends of the inductance coil L6, and the output end of the inductance coil L6 is used as the connecting end of a load after being filtered by the capacitor C43;
the power transformer TR2 is connected to a standby control circuit comprising a power management chip U1, the model of the chip U1 is HF500-15, two ends of a primary side first load of the power transformer TR2 are connected with one end of the positive electrode output end of the PFC control circuit and the other end of the primary side first load is connected to a pin D of the chip U1, a primary side second load of the power transformer TR2 provides VCC input for the chip U1, a secondary side of the power transformer TR2 outputs +5V, +12V, a +5V output end outputs +3.3V through a voltage stabilizer chip U5, and the model of the chip U5 is MP2009EE-3;
the constant-voltage constant-current control feedback output voltage stabilizing circuit acquires a voltage sampling signal from the positive output end of the output synchronous rectifying circuit, acquires a current sampling signal from the negative input end of the inductance coil L6, and has an output end connected to an FBL pin of a chip U3 of the LLC control circuit;
the standby control circuit provides 12V VDD input for a chip U8, and provides a 12V power supply and +3.3V comparison voltage for the constant-voltage constant-current control feedback output voltage stabilizing circuit.
Further, the mains supply input circuit is provided with an overcurrent protection fuse F1 and a lightning-resistant piezoresistor VAR1.
Further, the positive input end of the inductance coil L6 is connected in series with a fuse F2 for overcurrent protection.
The utility model has the advantages that: the utility model discloses a power adapter adopts parallelly connected 4 high-power MOS pipes, realizes 500W's power output, simultaneously, adopts the quick turn-off intelligent rectifier chip U3 of double-circuit (the model is MP 6924) control, and the function of turning off fast can make and to lead to mode (CCM) and intermittent conduction mode (DCM) in succession, has reduced the use of current standard external components and parts furthest, adopts SOIC-8 encapsulation. The LLC control circuit adopts a chip U1 with the model of HR1211, the integrated energy-saving technology of the LLC control circuit is favorable for optimizing efficiency in the whole working voltage range, the PFC controller adopts a digital average current control scheme to realize a continuous conduction and intermittent conduction mixed working mode, the continuous conduction mode can reduce the peak current of an MOSFET (metal oxide semiconductor field effect transistor) under heavy load and enlarge the load range of the controller, and the intermittent conduction mode can reduce the switching frequency under light load to realize higher efficiency. The standby control circuit provides working voltage and comparison voltage required by other modules or chips, and ensures the stable operation of the whole circuit.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a schematic diagram of a first circuit part of the present invention.
Fig. 3 is a schematic diagram of a second circuit part of the present invention.
Fig. 4 is a schematic diagram of a third circuit part of the present invention.
In the figure, the power supply control circuit comprises a mains supply input circuit 1, an EMI filter circuit 2, a rectification filter circuit 3, a PFC control circuit 4, an LLC power conversion circuit 5, an LLC power conversion circuit 6, an output synchronous rectification circuit 7, an LLC control circuit 8, a constant voltage and constant current control feedback output voltage stabilizing circuit 9, a standby control circuit 10, a battery charging control switch circuit 11 and an output filter circuit.
Detailed Description
The present invention will be further described with reference to the following specific examples and the accompanying drawings.
As shown in fig. 1-4, an internal circuit of a 500W power adapter for a vehicle-mounted power battery includes a commercial power input circuit 1, an EMI filter circuit 2, a rectification filter circuit 3, a PFC control circuit 4, an LLC power conversion circuit 5, an output synchronous rectification circuit 6, an LLC control circuit 7, a constant voltage and constant current control feedback output voltage stabilizing circuit 8, a standby control circuit 9, a battery charging control switch circuit 10, and an output filter circuit 11.
The mains supply input circuit 1 is provided with an overcurrent protection fuse F1 and a lightning-resistant piezoresistor VAR1.
The mains supply input circuit 1 is connected to the PFC control circuit 4 sequentially through the EMI filter circuit 2 and the rectification filter circuit 3, the rectification filter circuit 3 comprises a rectifier bridge and filter capacitors C33 and C39, the PFC control circuit 4 comprises MOS (metal oxide semiconductor) tubes Q3, Q3A and Q8, the drains of the MOS tubes Q3 and Q3A are connected to the positive electrode output end of the PFC control circuit 4 through a diode D21, and the grids of the MOS tubes Q3 and Q3A are connected to a GATEP pin of a chip U3 of the LLC control circuit 7 through resistors R46A and R46 respectively; the model of the chip U3 is HR1211; the source electrodes of the MOS tubes Q3, Q3A and Q8 are respectively grounded, the grid electrode of the MOS tube Q8 is connected with the GATEP pin of the chip U3, and the drain electrode of the MOS tube Q8 is respectively connected with the grid electrodes of the MOS tubes Q3 and Q3A through R64 and R64A; the negative output terminal of the PFC control circuit 4 is grounded.
The LLC power conversion circuit 5 comprises MOS (metal oxide semiconductor) tubes Q1 and Q2 and power transformers TR1 and TR2, wherein the drain electrode of the MOS tube Q1 is connected with the anode output end of the PFC control circuit 4, the connection point of the source electrode of the MOS tube Q1 and the drain electrode of the MOS tube Q2 is connected to one end of a primary winding of the power transformer TR1, the other end of the primary winding of the power transformer TR1 is grounded through a capacitor C16, and the source electrode of the MOS tube Q2 is grounded; the grid of MOS pipe Q1 is connected to the HSG pin of chip U3 through the parallel circuit of diode D5 and resistance R3, and the grid of MOS pipe Q2 is connected to the LSG pin of chip U3 through the parallel circuit of diode D10 and resistance R9.
The connection point of a secondary side first winding and a secondary side second winding of the power transformer TR1 is connected to the positive electrode output end of the output synchronous rectification circuit 6, and the other end of the secondary side first winding is respectively connected to the drain electrodes of MOS (metal oxide semiconductor) tubes Q4 and Q5 of the output synchronous rectification circuit 6; the other end of the secondary side second winding is respectively connected to the drain electrodes of MOS (metal oxide semiconductor) tubes Q6 and Q7 of the output synchronous rectification circuit 6; VG2 of a double-path fast turn-off intelligent rectifier chip U8 of the output synchronous rectification circuit 6 is connected to the grid electrodes of MOS transistors Q6 and Q7 through resistors R18 and R24 respectively; VG1 of the chip U8 is connected to the grids of the MOS tubes Q4 and Q5 through resistors R10 and R16 respectively; the source electrodes of the MOS tubes Q4, Q5, Q6 and Q7 are respectively grounded; the model of the chip U8 is MP6924; the positive electrode output end of the output synchronous rectification circuit 6 is connected with a battery charging control switch circuit 10, and is connected with an output filter circuit 11 after passing through a control switch; the output filter circuit 11 comprises an inductance coil L6, two input ends of the inductance coil L6, one end of the output filter circuit is connected with the positive output end of the output synchronous rectification circuit 6 passing through a control switch of the battery charging control switch circuit 10, and the other end of the output filter circuit is grounded through a parallel circuit consisting of resistors R6 and R6A; and a capacitor C43 is connected between the two output ends of the inductance coil L6, and the output end of the inductance coil L is used as the connecting end of the load after being filtered by the capacitor C43.
The power transformer TR2 is connected to a standby control circuit 9 comprising a power management chip U1, the model of the chip U1 is HF500-15, two ends of a primary side first load of the power transformer TR2 are connected to an anode output end of the PFC control circuit 4, the other end of the primary side first load is connected to a pin D of the chip U1, a primary side second load of the power transformer TR2 provides VCC input for the chip U1, secondary sides of the power transformer TR2 respectively output +5V, +12V, +5V output end is output +3.3V through a voltage stabilizer chip U5, and the model of the chip U5 is MP2009EE-3.
The constant-voltage constant-current control feedback output voltage stabilizing circuit 8 acquires a voltage sampling signal from the positive output end of the output synchronous rectification circuit 6, acquires a current sampling signal from the negative input end of the inductance coil L6, and has an output end connected to an FBL pin of a chip U3 of the LLC control circuit 7.
The standby control circuit 9 provides a 12V VDD input for the chip U8, and provides a 12V power supply and a +3.3V comparison voltage for the constant-voltage constant-current control feedback output voltage stabilizing circuit 8.
And the positive electrode input end of the inductance coil L6 is connected in series with a fuse F2 for overcurrent protection.
The utility model discloses an output synchronous rectification circuit 6 adopts parallelly connected 4 high-power MOS pipes Q4, Q5, Q6, Q7, realize 500W's power output, and simultaneously, adopt double-circuit to turn off intelligent rectifier chip U3 fast (the model is MP 6924) control, MP6924 is a double-circuit fast turn-off intelligent rectifier that is used for LLC resonant converter synchronous rectification of a section, light load function has, so that shutting down the grid driver under light load, MP6924 fast turn-off function can make Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM), MP6924 furthest has reduced the use of current standard external components and parts, adopt SOIC-8 encapsulation. The chip U1 of the LLC control circuit 7 is of the HR1211 type, and its integrated power saving technique helps to optimize the efficiency over the whole operating voltage range. The PFC controller adopts a digital average current control scheme to realize a continuous conduction and discontinuous conduction mixed working mode. Under heavy load, the continuous conduction mode can reduce the peak current of the MOSFET and enlarge the load range of the controller. Under light load, the discontinuous conduction mode can reduce the switching frequency to achieve higher efficiency. The standby control circuit 9 provides working power supply and comparison voltage required by other modules or chips, and ensures the stable operation of the whole circuit.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and those skilled in the art should be equivalent replacement modes without departing from the spirit and principles of the present invention.
Claims (3)
1. The utility model provides a on-vehicle power battery 500W power adapter which characterized in that: the internal circuit comprises a mains supply input circuit, an EMI filter circuit, a rectification filter circuit, a PFC control circuit, an LLC power conversion circuit, an output synchronous rectification circuit, an LLC control circuit, a constant voltage and constant current control feedback output voltage stabilizing circuit, a standby control circuit, a battery charging control switch circuit and an output filter circuit;
the mains supply input circuit is connected to the PFC control circuit through the EMI filter circuit and the rectification filter circuit in sequence, the rectification filter circuit comprises a rectifier bridge and filter capacitors C33 and C39, the PFC control circuit comprises MOS tubes Q3, Q3A and Q8, the drains of the MOS tubes Q3 and Q3A are connected to the positive electrode output end of the PFC control circuit through a diode D21, and the grids of the MOS tubes Q3 and Q3A are connected to a GATEP pin of a chip U3 of the LLC control circuit through resistors R46A and R46 respectively; the model of the chip U3 is HR1211; the source electrodes of the MOS tubes Q3, Q3A and Q8 are respectively grounded, the grid electrode of the MOS tube Q8 is connected with the GATEP pin of the chip U3, and the drain electrode of the MOS tube Q8 is respectively connected with the grid electrodes of the MOS tubes Q3 and Q3A through R64 and R64A; the negative output end of the PFC control circuit is grounded;
the LLC power conversion circuit comprises MOS (metal oxide semiconductor) tubes Q1 and Q2 and power transformers TR1 and TR2, wherein the drain electrode of the MOS tube Q1 is connected with the positive electrode output end of the PFC control circuit, the connection point of the source electrode of the MOS tube Q1 and the drain electrode of the MOS tube Q2 is connected to one end of a primary winding of the power transformer TR1, the other end of the primary winding of the power transformer TR1 is grounded through a capacitor C16, and the source electrode of the MOS tube Q2 is grounded; the grid of the MOS tube Q1 is connected to the HSG pin of the chip U3 through a parallel circuit formed by a diode D5 and a resistor R3, and the grid of the MOS tube Q2 is connected to the LSG pin of the chip U3 through a parallel circuit formed by a diode D10 and a resistor R9;
the other end of the secondary side first winding is respectively connected to the drain electrodes of MOS (metal oxide semiconductor) tubes Q4 and Q5 of the output synchronous rectification circuit; the other end of the secondary side second winding is respectively connected to the drain electrodes of MOS (metal oxide semiconductor) tubes Q6 and Q7 of the output synchronous rectification circuit; VG2 of a two-way quick turn-off intelligent rectifier chip U8 of the output synchronous rectification circuit is connected to the grids of MOS transistors Q6 and Q7 through resistors R18 and R24 respectively; VG1 of the chip U8 is connected to the grids of the MOS tubes Q4 and Q5 through resistors R10 and R16 respectively; the source electrodes of the MOS tubes Q4, Q5, Q6 and Q7 are respectively grounded; the model of the chip U8 is MP6924; the positive output end of the output synchronous rectification circuit is connected into a battery charging control switch circuit and then connected to an output filter circuit after passing through a control switch; the output filter circuit comprises an inductance coil L6, two input ends of the inductance coil L6, one end of the inductance coil L6 is connected with the positive output end of the output synchronous rectification circuit passing through the control switch of the battery charging control switch circuit, and the other end of the inductance coil L6 is grounded through a parallel circuit consisting of resistors R6 and R6A; a capacitor C43 is connected between the two output ends of the inductance coil L6, and the output end of the inductance coil L6 is used as the connecting end of a load after being filtered by the capacitor C43;
the power transformer TR2 is connected to a standby control circuit comprising a power management chip U1, the type of the chip U1 is HF500-15, two ends of a primary side first load of the power transformer TR2 are connected with one end of a positive electrode output end of a PFC control circuit and the other end of the primary side first load is connected to a D pin of the chip U1, a primary side second load of the power transformer TR2 provides VCC input for the chip U1, secondary sides of the power transformer TR2 respectively output +5V, +12V, +5V, and a +3.3V is output from a +5V output end through a voltage stabilizer chip U5, and the type of the chip U5 is MP2009EE-3;
the constant-voltage constant-current control feedback output voltage stabilizing circuit acquires a voltage sampling signal from the positive electrode output end of the output synchronous rectifying circuit, acquires a current sampling signal from the negative electrode input end of the inductance coil L6, and the output end of the constant-voltage constant-current control feedback output voltage stabilizing circuit is connected to an FBL pin of a chip U3 of the LLC control circuit;
the standby control circuit provides a 12V VDD input for the chip U8, and provides a 12V power supply and +3.3V comparison voltage for the constant-voltage constant-current control feedback output voltage stabilizing circuit.
2. The vehicle-mounted power battery 500W power adapter according to claim 1, characterized in that: the commercial power input circuit is provided with a fuse F1 for overcurrent protection and a piezoresistor VAR1 for lightning resistance.
3. The vehicle-mounted power battery 500W power adapter according to claim 1, characterized in that: and the positive electrode input end of the inductance coil L6 is connected in series with a fuse F2 for overcurrent protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223600997.3U CN218868122U (en) | 2022-12-29 | 2022-12-29 | 500W power adapter of vehicle-mounted power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223600997.3U CN218868122U (en) | 2022-12-29 | 2022-12-29 | 500W power adapter of vehicle-mounted power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218868122U true CN218868122U (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223600997.3U Active CN218868122U (en) | 2022-12-29 | 2022-12-29 | 500W power adapter of vehicle-mounted power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218868122U (en) |
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2022
- 2022-12-29 CN CN202223600997.3U patent/CN218868122U/en active Active
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