CN219875180U - High-power charger for automobile production line - Google Patents
High-power charger for automobile production line Download PDFInfo
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- CN219875180U CN219875180U CN202321021491.9U CN202321021491U CN219875180U CN 219875180 U CN219875180 U CN 219875180U CN 202321021491 U CN202321021491 U CN 202321021491U CN 219875180 U CN219875180 U CN 219875180U
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 39
- 238000002955 isolation Methods 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 23
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 10
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- 238000010586 diagram Methods 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 2
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Abstract
The utility model provides a high-power charger for an automobile production line, which comprises: the device comprises an input connector, a lightning protection circuit, an input rectifying circuit, an input filter circuit, a surge current limiting circuit, a BUCK voltage reducing circuit, a holding circuit, a phase-shifting full-bridge circuit, an alternating-current voltage detecting circuit, a direct-current voltage detecting circuit, a first transformer, a first synchronous rectifying circuit, a first output filter circuit, a second transformer, a second synchronous rectifying circuit, a second output filter circuit, a primary current sampling circuit, a first opto-coupler isolation circuit, a second opto-coupler isolation circuit, a first microprocessor, an output voltage detecting circuit, an output current detecting circuit, a reverse connection protection circuit and an output connector; the utility model can provide large current output, improves the switching conversion efficiency and has obvious energy-saving effect during large current charging.
Description
Technical Field
The utility model relates to a storage battery charging wire, in particular to a high-power charger for an automobile production line.
Background
In automotive production lines, such as chassis lines, door lines, assembly lines, etc., there are often power cells that provide low voltage direct current for device handling.
Therefore, the power battery of the automobile production line needs to be charged frequently, and a high-power charger needs to be arranged at the moment.
The existing storage battery charger is low in power, often cannot meet the charging power requirement, and is low in switching conversion efficiency, so that electric energy is lost.
Disclosure of Invention
Aiming at the defects existing in the prior art, the embodiment of the utility model provides a high-power charger for an automobile production line, which can provide high-current output, improves the switching conversion efficiency and saves electric energy. In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the utility model is as follows:
the embodiment of the utility model provides a high-power charger for an automobile production line, which comprises the following components: the device comprises an input connector, a lightning protection circuit, an input rectifying circuit, an input filter circuit, a surge current limiting circuit, a BUCK voltage reducing circuit, a holding circuit, a phase-shifting full-bridge circuit, an alternating-current voltage detecting circuit, a direct-current voltage detecting circuit, a first transformer, a first synchronous rectifying circuit, a first output filter circuit, a second transformer, a second synchronous rectifying circuit, a second output filter circuit, a primary current sampling circuit, a first opto-coupler isolation circuit, a second opto-coupler isolation circuit, a first microprocessor, an output voltage detecting circuit, an output current detecting circuit, a reverse connection protection circuit and an output connector;
the input connector is used for externally connecting three-phase alternating current, the input connector is connected with one end of the lightning protection circuit, the other end of the lightning protection circuit is connected with the input end of the input rectifying circuit, the output end of the input rectifying circuit is connected with one end of the input filtering circuit, the other end of the input filtering circuit is connected with one end of the surge current limiting circuit, the other end of the surge current limiting circuit is connected with the input end of the BUCK step-down circuit, the output end of the BUCK step-down circuit is connected with one end of the holding circuit, the other end of the holding circuit is connected with the input end of the phase-shifting full-bridge circuit, and the output ends of the phase-shifting full-bridge circuit are respectively connected with the primary stages of the first transformer and the second transformer; the alternating current voltage detection circuit detects alternating current voltage between the lightning protection circuit and the input rectifying circuit and feeds back the alternating current voltage to the first microprocessor, and the direct current voltage detection circuit detects direct current voltage between the holding circuit and the phase-shifting full-bridge circuit and feeds back the direct current voltage to the first microprocessor through the second optocoupler isolation circuit; the first microprocessor is connected with the BUCK step-down circuit; the first microprocessor controls a switching tube in the phase-shifting full-bridge circuit through a first optocoupler isolation circuit; the primary side current sampling circuit samples current between the phase-shifting full-bridge circuit and the first transformer and feeds the current back to the first microprocessor;
the secondary side of the first transformer is connected with one end of a first synchronous rectification circuit, and the other end of the first synchronous rectification circuit is connected with one end of a first output filter circuit; the secondary side of the second transformer is connected with one end of a second synchronous rectification circuit, and the other end of the second synchronous rectification circuit is connected with one end of a second output filter circuit; the other end of the first output filter circuit and the other end of the second output filter circuit are connected with the input end of the reverse connection protection circuit, the output end of the reverse connection protection circuit is connected with an output connector, and the output connector is used for being connected with a storage battery; the first microprocessor controls switching tubes in the first synchronous rectification circuit and the second synchronous rectification circuit; the output voltage detection circuit detects the voltage between the first output filter circuit and the reverse connection protection circuit and feeds back the voltage to the first microprocessor, and the output current detection circuit detects the current between the first output filter circuit and the reverse connection protection circuit and feeds back the current to the first microprocessor.
Further, the first transformer, the first synchronous rectification circuit and the first output filter circuit are respectively the same as the second transformer, the second synchronous rectification circuit and the second output filter circuit;
the phase-shifting full-bridge circuit comprises switching tubes QA, QB, QC and QD, the first transformer comprises a transformer T, the first synchronous rectification circuit comprises switching tubes Q1 and Q2, and the first output filter circuit comprises inductors L1 and L2 and a capacitor C1;
the drain electrodes of the switching tubes QA and QC are connected, and the source electrodes of the QB and QD are connected; the source electrode of the switching tube QA is connected with the drain electrode of the QB and the primary side homonymous end of the transformer T, and the source electrode of the switching tube QC is connected with the drain electrode of the QD and the primary side heteronymous end of the transformer T; the secondary side homonymous end of the transformer T is connected with the drain electrode of the switch tube Q1 and one end of the inductor L1, the other end of the inductor L1 is connected with one end of the capacitor C1, the secondary side heteronymous end of the transformer T is connected with the source electrode of the switch tube Q2 and one end of the inductor L2, and the other end of the inductor L2 is connected with one end of the capacitor C1; the source of the switching tube Q1 is connected with the drain of the switching tube Q2 and the other end of the capacitor C1.
Further, the first microprocessor samples a DSP processor.
Further, the charger also comprises a second microprocessor, and the first microprocessor and the second microprocessor are connected through a CAN bus and/or an RS485 interface.
Further, the second microprocessor adopts an ARM processor.
Further, the second microprocessor is connected with a display screen.
The technical scheme provided by the embodiment of the utility model has the beneficial effects that: the high-power charger for the automobile production line can provide enough output current, and meets the requirement of on-site high-current charging of the automobile production line; the phase-shifting full-bridge circuit can improve the switching conversion efficiency, reduce the switching loss and has obvious energy-saving effect in the process of charging with large current.
Drawings
Fig. 1 is an electrical block diagram of a charger in an embodiment of the utility model.
Fig. 2 is a schematic diagram of a phase-shifting full-bridge circuit according to an embodiment of the present utility model during t0- > t 1.
Fig. 3 is a schematic diagram of a phase-shifting full-bridge circuit according to an embodiment of the present utility model during t1- > t 2.
Fig. 4 is a schematic diagram of a phase-shifting full-bridge circuit according to an embodiment of the present utility model during t2- > t 3.
Fig. 5 is a schematic diagram of a phase-shifting full-bridge circuit according to an embodiment of the present utility model during t3- > t 4.
Fig. 6 is a timing diagram of a phase-shifted full-bridge circuit and a synchronous rectification circuit according to an embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, a high-power charger for an automobile production line according to an embodiment of the present utility model includes: an input connector 1, a lightning protection circuit 2, an input rectifying circuit 3, an input filter circuit 4, a surge current limiting circuit 5, a BUCK step-down circuit 6, a holding circuit 7, a phase-shift full-bridge circuit 8, an alternating voltage detection circuit 9, a direct voltage detection circuit 10, a first transformer 11, a first synchronous rectifying circuit 12, a first output filter circuit 13, a second transformer 14, a second synchronous rectifying circuit 15, a second output filter circuit 16, a primary current sampling circuit 17, a first optocoupler isolation circuit 18, a second optocoupler isolation circuit 19, a first microprocessor 20, an output voltage detection circuit 21, an output current detection circuit 22, a reverse connection protection circuit 23 and an output connector 24;
the input connector 1 is used for externally connecting three-phase alternating current, the input connector 1 is connected with one end of the lightning protection circuit 2, the other end of the lightning protection circuit 2 is connected with the input end of the input rectifying circuit 3, the output end of the input rectifying circuit 3 is connected with one end of the input filtering circuit 4, the other end of the input filtering circuit 4 is connected with one end of the surge current limiting circuit 5, the other end of the surge current limiting circuit 5 is connected with the input end of the BUCK step-down circuit 6, the output end of the BUCK step-down circuit 6 is connected with one end of the holding circuit 7, the other end of the holding circuit 7 is connected with the input end of the phase-shifting full-bridge circuit 8, and the output ends of the phase-shifting full-bridge circuit 8 are respectively connected with the primary stages of the first transformer 11 and the second transformer 14; the alternating current voltage detection circuit 9 detects alternating current voltage between the lightning protection circuit 2 and the input rectification circuit 3 and feeds back the alternating current voltage to the first microprocessor 20, and the direct current voltage detection circuit 10 detects direct current voltage between the holding circuit 7 and the phase-shifting full-bridge circuit 8 and feeds back the direct current voltage to the first microprocessor 20 through the second optocoupler isolation circuit 19; the first microprocessor 20 is connected with the BUCK step-down circuit 6; the first microprocessor 20 controls a switching tube in the phase-shifting full-bridge circuit 8 through the first optocoupler isolation circuit 18; the primary side current sampling circuit 17 samples the current between the phase-shifting full-bridge circuit 8 and the first transformer 11 and feeds back the current to the first microprocessor 20;
the secondary of the first transformer 12 is connected with one end of the first synchronous rectification circuit 12, and the other end of the first synchronous rectification circuit 12 is connected with one end of the first output filter circuit 13; the secondary of the second transformer 14 is connected with one end of a second synchronous rectification circuit 15, and the other end of the second synchronous rectification circuit 15 is connected with one end of a second output filter circuit 16; the other end of the first output filter circuit 13 and the other end of the second output filter circuit 16 are connected with the input end of the reverse connection protection circuit 23, the output end of the reverse connection protection circuit 23 is connected with the output connector 24, and the output connector 24 is used for being connected with a storage battery; the first microprocessor 20 controls switching tubes in the first synchronous rectification circuit 12 and the second synchronous rectification circuit 15; the output voltage detection circuit 21 detects the voltage between the first output filter circuit 13 and the reverse connection protection circuit 23 and feeds back to the first microprocessor 20, and the output current detection circuit 22 detects the current between the first output filter circuit 13 and the reverse connection protection circuit 23 and feeds back to the first microprocessor 20.
In the embodiment provided by the utility model, the lightning protection circuit 2 can prevent abrupt voltage caused by lightning stroke from damaging the charger; the input rectifying circuit 3 rectifies the three-phase alternating current to obtain a direct current voltage of about 540v, and the input filtering circuit 4 can filter clutter in the input voltage; the BUCK circuit 6 can reduce the dc voltage of 540v to about 350v, and the first microprocessor 20 can control the output of the BUCK circuit 6 to be kept at 350v according to the feedback of the dc voltage detection circuit 10; an energy storage capacitor is arranged in the holding circuit 7 to provide energy storage for the charger during high-current output; the phase-shifting full-bridge circuit 8 is controlled by the first microprocessor 20, and can reduce the voltage of the primary side of the transformer, so that the output voltage of the charger is kept at a set direct-current low voltage, such as the charging voltage of a +12v storage battery; the phase-shifting full-bridge circuit 8 is adopted in the utility model, so that the switching conversion efficiency can be improved, the switching loss can be reduced, and the energy-saving effect is obvious during high-current charging; according to the utility model, two paths of synchronous rectification circuits are arranged, and the outputs of the two paths of synchronous rectification circuits are combined after being filtered, so that the output capacity of the charger is improved, and the field heavy current charging requirement of an automobile production line is met; the output end of the charger is provided with a reverse connection protection circuit 23, so that the damage to the charger caused by polarity reverse connection when the storage battery is connected is prevented; the output voltage detection circuit 21 and the output current detection circuit 22 can monitor the output voltage and the output current in real time, and the first microprocessor 20 can adjust the switching tube in the phase-shifting full-bridge circuit 8 in real time according to the output voltage and the output current monitored in real time, so that the output voltage is set according to the charging requirement.
The first transformer 11, the first synchronous rectification circuit 12 and the first output filter circuit 13 are respectively identical to the second transformer 14, the second synchronous rectification circuit 15 and the second output filter circuit 16;
as shown in fig. 2, 3, 4, and 5, the phase-shifting full-bridge circuit 8 includes switching transistors QA, QB, QC, and QD, the first transformer 11 includes a transformer T, the first synchronous rectification circuit 12 includes switching transistors Q1 and Q2, and the first output filter circuit 13 includes inductors L1, L2, and a capacitor C1;
the drain electrodes of the switching tubes QA and QC are connected, and the source electrodes of the QB and QD are connected; the source electrode of the switching tube QA is connected with the drain electrode of the QB and the primary side homonymous end of the transformer T, and the source electrode of the switching tube QC is connected with the drain electrode of the QD and the primary side heteronymous end of the transformer T; the secondary side homonymous end of the transformer T is connected with the drain electrode of the switch tube Q1 and one end of the inductor L1, the other end of the inductor L1 is connected with one end of the capacitor C1, the secondary side heteronymous end of the transformer T is connected with the source electrode of the switch tube Q2 and one end of the inductor L2, and the other end of the inductor L2 is connected with one end of the capacitor C1; the source electrode of the switching tube Q1 is connected with the drain electrode of the switching tube Q2 and the other end of the capacitor C1;
fig. 6 shows control timings of the phase-shift full-bridge circuit 8 and the first synchronous rectification circuit 12 and voltage and current variations on the inductors L1 and L2; the dashed lines in the figure represent the current tracks.
Specifically, the first microprocessor 20 samples a DSP processor, and the present utility model further includes a second microprocessor 25, where the first microprocessor 20 and the second microprocessor 25 are connected through a CAN bus and/or an RS485 interface; the processing speed of the processor can be improved, and voltage and current adjustment can be performed more quickly.
Specifically, the second microprocessor 25 employs an ARM processor;
specifically, the second microprocessor 25 is connected to a display screen 26; parameters such as charging voltage, charging current, etc. may be displayed on the display screen 26.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to the examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.
Claims (6)
1. A high power charger for an automotive production line, comprising: the anti-lightning protection circuit comprises an input connector (1), an anti-lightning protection circuit (2), an input rectifying circuit (3), an input filtering circuit (4), a surge current limiting circuit (5), a BUCK circuit (6), a holding circuit (7), a phase-shifting full-bridge circuit (8), an alternating voltage detection circuit (9), a direct voltage detection circuit (10), a first transformer (11), a first synchronous rectifying circuit (12), a first output filtering circuit (13), a second transformer (14), a second synchronous rectifying circuit (15), a second output filtering circuit (16), a primary current sampling circuit (17), a first opto-coupler isolation circuit (18), a second opto-coupler isolation circuit (19), a first microprocessor (20), an output voltage detection circuit (21), an output current detection circuit (22), a reverse connection protection circuit (23) and an output connector (24);
the input connector (1) is used for externally connecting three-phase alternating current, the input connector (1) is connected with one end of the lightning protection circuit (2), the other end of the lightning protection circuit (2) is connected with the input end of the input rectifying circuit (3), the output end of the input rectifying circuit (3) is connected with one end of the input filtering circuit (4), the other end of the input filtering circuit (4) is connected with one end of the surge current limiting circuit (5), the other end of the surge current limiting circuit (5) is connected with the input end of the BUCK step-down circuit (6), the output end of the BUCK step-down circuit (6) is connected with one end of the holding circuit (7), the other end of the holding circuit (7) is connected with the input end of the phase-shifting full-bridge circuit (8), and the output end of the phase-shifting full-bridge circuit (8) is respectively connected with the primary ends of the first transformer (11) and the second transformer (14); the alternating current voltage detection circuit (9) detects alternating current voltage between the lightning protection circuit (2) and the input rectification circuit (3) and feeds back the alternating current voltage to the first microprocessor (20), and the direct current voltage detection circuit (10) detects direct current voltage between the holding circuit (7) and the phase-shifting full-bridge circuit (8) and feeds back the direct current voltage to the first microprocessor (20) through the second optocoupler isolation circuit (19); the first microprocessor (20) is connected with the BUCK step-down circuit (6); the first microprocessor (20) controls a switching tube in the phase-shifting full-bridge circuit (8) through the first optocoupler isolation circuit (18); the primary side current sampling circuit (17) samples the current between the phase-shifting full-bridge circuit (8) and the first transformer (11) and feeds back the current to the first microprocessor (20);
the secondary side of the first transformer (11) is connected with one end of a first synchronous rectification circuit (12), and the other end of the first synchronous rectification circuit (12) is connected with one end of a first output filter circuit (13); the secondary side of the second transformer (14) is connected with one end of a second synchronous rectification circuit (15), and the other end of the second synchronous rectification circuit (15) is connected with one end of a second output filter circuit (16); the other end of the first output filter circuit (13) and the other end of the second output filter circuit (16) are connected with the input end of the reverse connection protection circuit (23), the output end of the reverse connection protection circuit (23) is connected with the output connector (24), and the output connector (24) is used for being connected with a storage battery; the first microprocessor (20) controls switching tubes in the first synchronous rectification circuit (12) and the second synchronous rectification circuit (15); the output voltage detection circuit (21) detects the voltage between the first output filter circuit (13) and the reverse connection protection circuit (23) and feeds back the voltage to the first microprocessor (20), and the output current detection circuit (22) detects the current between the first output filter circuit (13) and the reverse connection protection circuit (23) and feeds back the current to the first microprocessor (20).
2. The high-power charger for an automobile production line according to claim 1, wherein,
the first transformer (11), the first synchronous rectification circuit (12) and the first output filter circuit (13) are respectively identical to the second transformer (14), the second synchronous rectification circuit (15) and the second output filter circuit (16);
the phase-shifting full-bridge circuit (8) comprises switching tubes QA, QB, QC and QD, the first transformer (11) comprises a transformer T, the first synchronous rectification circuit (12) comprises switching tubes Q1 and Q2, and the first output filter circuit (13) comprises inductors L1 and L2 and a capacitor C1;
the drain electrodes of the switching tubes QA and QC are connected, and the source electrodes of the QB and QD are connected; the source electrode of the switching tube QA is connected with the drain electrode of the QB and the primary side homonymous end of the transformer T, and the source electrode of the switching tube QC is connected with the drain electrode of the QD and the primary side heteronymous end of the transformer T; the secondary side homonymous end of the transformer T is connected with the drain electrode of the switch tube Q1 and one end of the inductor L1, the other end of the inductor L1 is connected with one end of the capacitor C1, the secondary side heteronymous end of the transformer T is connected with the source electrode of the switch tube Q2 and one end of the inductor L2, and the other end of the inductor L2 is connected with one end of the capacitor C1; the source of the switching tube Q1 is connected with the drain of the switching tube Q2 and the other end of the capacitor C1.
3. The high-power charger for an automobile production line according to claim 1, wherein,
the first microprocessor (20) samples a DSP processor.
4. The high-power charger for automobile production line according to claim 3, wherein,
the charger also comprises a second microprocessor (25), and the first microprocessor (20) is connected with the second microprocessor (25) through a CAN bus and/or an RS485 interface.
5. The high-power charger for automobile production line of claim 4, wherein,
the second microprocessor (25) employs an ARM processor.
6. The high-power charger for automobile production line of claim 4, wherein,
the second microprocessor (25) is connected with a display screen (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321021491.9U CN219875180U (en) | 2023-04-26 | 2023-04-26 | High-power charger for automobile production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321021491.9U CN219875180U (en) | 2023-04-26 | 2023-04-26 | High-power charger for automobile production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875180U true CN219875180U (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321021491.9U Active CN219875180U (en) | 2023-04-26 | 2023-04-26 | High-power charger for automobile production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219875180U (en) |
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2023
- 2023-04-26 CN CN202321021491.9U patent/CN219875180U/en active Active
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