CN110601323A - Charging device and driving power generation circuit - Google Patents
Charging device and driving power generation circuit Download PDFInfo
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- CN110601323A CN110601323A CN201910806422.0A CN201910806422A CN110601323A CN 110601323 A CN110601323 A CN 110601323A CN 201910806422 A CN201910806422 A CN 201910806422A CN 110601323 A CN110601323 A CN 110601323A
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- 238000010248 power generation Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 71
- 239000003990 capacitor Substances 0.000 claims abstract description 64
- 238000004804 winding Methods 0.000 claims description 26
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 17
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/081—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters wherein the phase of the control voltage is adjustable with reference to the AC source
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a charging device and a driving power generation circuit thereof, wherein the driving power generation circuit comprises a first diode and a first capacitor, wherein the anode of the first diode is connected with a first node of a voltage conversion module of the charging device, the cathode of the first diode is connected with a first end of the first capacitor, the second end of the first resistor is connected with a positive output end of the voltage conversion module of the charging device, and in at least part of working period of the voltage conversion module, the voltage of the first node is higher than that of the positive output end. By implementing the technical scheme of the invention, the driving power generation circuit can ensure the stability of the driving voltage on the driving circuit, has simple structure and low cost, and also reduces the complexity and layout difficulty of the PCB.
Description
Technical Field
The invention relates to the field of storage battery charging, in particular to a charging device and a driving power supply generating circuit.
Background
In the field of battery charging, an anti-reverse diode DF needs to be added at the interface to protect the internal circuits of the charging device (e.g. charger, power supply), as shown in fig. 1. This diode DF can be arranged either outside or inside the charging device, and manufacturers producing charging devices are increasingly inclined to place this diode DF inside the charging device. In this way, the power loss generated by this diode DF greatly reduces the overall conversion efficiency of the charging device.
In order to improve the efficiency, relays may be connected in parallel to two ends of the diode DF, as shown in fig. 2, after the diode DF is turned on, the relays are attracted, the charging current is bypassed by the relays, and only a small part of the charging current passes through the diode DF, so that the loss of the diode DF is greatly reduced. Certainly, the diode DF may also be replaced by an MOS transistor SF, as shown in fig. 3, when a body diode of the MOS transistor SF is turned on, a forward driving voltage is applied between two poles of a gate and a source of the MOS transistor SF, and a charging current flows through a conductive channel of the MOS transistor SF, so that the conduction voltage drop can be significantly reduced, and the effect of reducing the loss can also be achieved.
A driving power supply is needed no matter a relay is connected in parallel with two ends of a diode DF, or a MOS tube SF is used for replacing the diode DF. Taking the MOS transistor SF as an example, the magnitude of the driving power supply does not exceed the gate limit voltage of the MOS transistor SF, generally about 15V, with the output positive electrode of the charging device as a reference. However, in order to generate the independent driving power, a special auxiliary source winding circuit or an isolation conversion module is required, which not only increases the cost of the system, but also increases the complexity and layout difficulty of the PCB of the charging device.
Disclosure of Invention
The invention aims to solve the technical problems of high cost, complex PCB and difficult layout in the prior art, and provides a charging device and a driving power supply generating circuit.
The technical scheme adopted by the invention for solving the technical problems is as follows: a drive power supply generation circuit of a charging device is configured for driving a reverse-preventing module by a drive circuit, the drive power supply generation circuit including: a first diode and a first capacitor, wherein the anode of the first diode is connected to the first node of the voltage conversion module of the charging device, the cathode of the first diode is connected to the first end of the first capacitor, the second end of the first resistor is connected to the positive output end of the voltage conversion module of the charging device, and,
the voltage of the first node is higher than the voltage of the positive output terminal during at least part of the period of operation of the voltage conversion module.
Preferably, the capacitor further comprises a first resistor, and the first resistor is connected between the cathode of the first diode and the first end of the first capacitor.
Preferably, the capacitor further comprises a second resistor, and the second resistor is connected in parallel across the first capacitor.
Preferably, a zener diode is further included, and a cathode of the zener diode is connected to the first end of the first capacitor, and an anode of the zener diode is connected to the second end of the first capacitor.
The invention also constructs a charging device, which comprises a voltage conversion module and an anti-reverse module, and also comprises:
a drive circuit; and
the above-described drive power generation circuit.
Preferably, the output stage of the voltage conversion module is a BUCK step-down circuit, wherein the BUCK step-down circuit includes a first MOS transistor, a first inductor, a second diode and an output capacitor, a drain of the first MOS transistor is connected to a positive terminal of a previous stage of output voltage, a source of the first MOS transistor is connected to a first end of the first inductor, a second end of the first inductor is a positive output terminal of the voltage conversion module, and is used for connecting a positive terminal of a storage battery through the anti-reverse module; the negative end of the previous-stage output voltage is the negative output end of the voltage conversion module and is used for being connected with the negative end of the storage battery; the negative electrode of the second diode is connected with the first end of the first inductor, the first end of the output capacitor is connected with the second end of the first inductor, and the positive electrode of the second diode and the second end of the output capacitor are respectively connected with the negative output end of the voltage conversion module; furthermore, it is possible to provide a liquid crystal display device,
the first end of the first inductor is the first node.
Preferably, the output stage of the voltage conversion module is an LLC circuit, and the LLC circuit includes a third diode, a fourth diode, an output capacitor, and a first transformer having a secondary winding with a center tap, where the center tap of the secondary winding of the first transformer is a positive output terminal of the voltage conversion module and is used to connect a positive terminal of a storage battery through the anti-reverse module; the negative electrode of the fourth diode is connected with the homonymous end of the secondary winding of the first transformer, the negative electrode of the third diode is connected with the synonym end of the secondary winding of the first transformer, the positive electrode of the fourth diode is connected with the positive electrode of the third diode and serves as the negative output end of the voltage conversion module, and the output capacitor is connected between the positive output end and the negative output end of the voltage conversion module; furthermore, it is possible to provide a liquid crystal display device,
the cathode of the fourth diode is the first node.
Preferably, the output stage of the voltage conversion module is a phase-shifted full-bridge circuit, and the phase-shifted full-bridge circuit includes: the second transformer comprises a fifth diode, a sixth diode, a second inductor, an output capacitor and a secondary winding, wherein the secondary winding is provided with a center tap, the center tap of the secondary winding of the second transformer is connected with the first end of the second inductor, and the second end of the second inductor is the positive output end of the voltage conversion module and is used for being connected with the positive end of a storage battery through the anti-reverse module; the negative electrode of the sixth diode is connected with the homonymous end of the secondary winding of the second transformer, the negative electrode of the fifth diode is connected with the synonym end of the secondary winding of the second transformer, the positive electrode of the sixth diode is connected with the positive electrode of the fifth diode and serves as the negative output end of the voltage conversion module, and the output capacitor is connected between the positive output end and the negative output end of the voltage conversion module; furthermore, it is possible to provide a liquid crystal display device,
the cathode of the sixth diode is the first node.
Preferably, the reverse prevention module comprises a seventh diode and a relay, wherein the anode of the seventh diode is connected to the positive output end of the voltage conversion module, the cathode of the seventh diode is connected to the positive end of the storage battery, the relay is connected in parallel with the seventh diode, and the drive power supply generation circuit drives the relay through the drive circuit.
Preferably, the reverse prevention module includes a first switch tube, a first end of the first switch tube is connected to the positive output end of the voltage conversion module, a second end of the first switch tube is connected to the positive end of the battery, and a control end of the first switch tube is connected to the output end of the driving circuit.
In the driving power generating circuit, the voltage of the first node is higher than the voltage of the positive output end of the voltage conversion module in at least partial time period, so that the voltage conversion module can charge the first capacitor through the first diode through the node, and in addition, the first diode can prevent the charge on the first capacitor from flowing back to the first node, thereby ensuring the stability of the driving voltage on the driving circuit. In addition, the driving power supply built by the capacitor and the diode has the advantages of simple structure and low cost, and the complexity and layout difficulty of the PCB are also reduced.
Drawings
In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort. In the drawings:
fig. 1 is a circuit diagram of a first charging device and a storage battery according to the prior art;
fig. 2 is a circuit diagram of a second conventional charging device and a secondary battery;
fig. 3 is a circuit diagram of a third conventional charging device and a secondary battery;
FIG. 4 is a circuit diagram of a charging device and a first embodiment of a storage battery according to the present invention;
FIG. 5 is a circuit diagram of a second embodiment of the charging device and the battery of the present invention;
FIG. 6 is a circuit diagram of a third embodiment of a charging device and a storage battery according to the present invention;
FIG. 7 is a circuit diagram of a fourth embodiment of the charging device and the battery of the present invention;
FIG. 8 is a circuit diagram of a fifth embodiment of the charging device and the battery of the present invention;
FIG. 9 is a circuit diagram of a charging device and a battery according to a sixth embodiment of the present invention;
fig. 10 is a circuit diagram of a seventh embodiment of the charging device and the storage battery of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 4 is a circuit diagram of a charging device and a first embodiment of a storage battery according to the present invention, and first, it is described that the charging device is, for example, a charger or a power supply, and is used for charging the storage battery, and includes a voltage conversion module, and further includes an anti-reverse module, a driving circuit, and a driving power generation circuit 11 which are built in or externally connected. The voltage conversion module is used for converting power supply voltage; the anti-reverse module is used for preventing the current of the storage battery from flowing into the charging device; the driving power generation circuit 11 drives the reverse preventing module through the driving circuit.
The drive power supply generation circuit 11 includes a first diode D and a first capacitor C. The positive pole of the first diode D is connected with the first node of the voltage conversion module of the charging device, the negative pole of the first diode D is connected with the first end of the first capacitor C, the second end of the first resistor C is connected with the positive output end of the voltage conversion module of the charging device, and in at least part of the working period of the voltage conversion module, the voltage of the first node is higher than that of the positive output end. In addition, the driving circuit is connected to the rear end of the first capacitor C, and the first capacitor C is used for providing driving voltage for the driving circuit. The anti-reverse module is an MOS tube SF, the source electrode of the MOS tube SF is connected with the positive output end of the voltage conversion module, the drain electrode of the MOS tube SF is connected with the positive end of the storage battery, and the grid electrode of the MOS tube SF is connected with the output end of the driving circuit.
With regard to the technical solution of this embodiment, first, it is explained that the driving power generating circuit can operate on the premise that: a first node is found within the voltage conversion module of the charging device, whose voltage Vn is higher than the voltage Vo at the positive output of the voltage conversion module for at least a part of the time period, so that the voltage conversion module can charge the first capacitor C via the first diode D via the first node. Moreover, the first diode D is used for preventing the charge on the first capacitor C from flowing back to the node, and the first capacitor C is responsible for storing the charge, so that the driving voltage on the driving circuit is ensured to be stable.
Fig. 5 is a circuit diagram of a charging device and a second embodiment of a storage battery according to the present invention, the charging device of the present embodiment includes a voltage conversion module, and further includes an anti-reverse module, a driving circuit, and a driving power generation circuit 11, which are built in or externally connected, and the driving power generation circuit 11 of the present embodiment is different from the driving power generation circuit shown in fig. 4 only in that: the voltage conversion module further comprises a first resistor R1, the first resistor R1 is connected between the cathode of the first diode D and the first end of the first capacitor C, and the voltage conversion module can charge the first capacitor C through the first diode D and the first resistor R1 via the first node, and the first resistor R1 is responsible for controlling the magnitude of the charging current on the first capacitor C.
Fig. 6 is a circuit diagram of a third embodiment of the charging device and the storage battery of the present invention, the charging device of the present embodiment includes a voltage conversion module, and further includes an anti-reverse module, a driving circuit and a driving power generation circuit 11, and the driving power generation circuit 11 of the present embodiment is different from the driving power generation circuit shown in fig. 5 only in that: and the circuit also comprises a second resistor R2, and the second resistor R2 is connected in parallel across the first capacitor C. Moreover, the second resistor R2 and the first resistor R1 divide the voltage, so the voltage (i.e. the driving voltage) on the first capacitor C can be adjusted by adjusting the resistance of the second resistor R2, and the charging current of the first capacitor C can be adjusted according to the load and the division ratio.
Fig. 7 is a circuit diagram of a charging device and a fourth embodiment of a storage battery according to the present invention, the charging device of the present embodiment includes a voltage conversion module, and further includes an anti-reverse module, a driving circuit, and a driving power generation circuit 11, which are built in or externally connected, and the driving power generation circuit 11 of the present embodiment is different from the driving power generation circuit shown in fig. 5 only in that: the voltage stabilizing diode Dz is connected with the first end of the first capacitor C through the cathode, and connected with the second end of the first capacitor C through the anode. Moreover, the voltage stabilizing diode Dz is used for ensuring that the voltage on the first capacitor C does not exceed the maximum limit voltage of the anti-reverse module, and an 18V or 15V voltage stabilizing tube can be selected. Finally, it should be noted that the zener diode Dz is not necessary, and the zener diode Dz may be omitted if the voltage on the first capacitor C does not exceed the maximum limit voltage of the anti-reverse module.
Fig. 8 is a circuit diagram of a fifth embodiment of the charging device and the storage battery of the present invention, which is different from the embodiment shown in fig. 7 only in that: the output stage of the voltage conversion module is a BUCK voltage reduction circuit, the BUCK voltage reduction circuit comprises a first MOS tube Sbuck, a first inductor L, a second diode Dbuck and an output capacitor Co, the drain electrode of the first MOS tube Sbuck is connected with the positive end of the previous stage of output voltage, the source electrode of the first MOS tube Sbuck is connected with the first end of the first inductor L, the second end of the first inductor L is the positive output end of the voltage conversion module and is used for being connected with the positive end of a storage battery through an anti-reverse module; the negative end of the previous stage of output voltage is the negative output end of the voltage conversion module and is used for being connected with the negative end of the storage battery; the cathode of the second diode Dbuck is connected with the first end of the first inductor L, the first end of the output capacitor Co is connected with the second end of the first inductor L, and the anode of the second diode Dbuck and the second end of the output capacitor Co are respectively connected with the negative output end of the voltage conversion module. Furthermore, the first end of the first inductor (L) is a first node.
In this embodiment, the first node is selected from a connection point of a first MOS transistor Sbuck and a second diode Dbuck in the BUCK step-down circuit, when the first MOS transistor Sbuck is turned on, a voltage Vn of the first node is higher than a voltage Vo of the positive output terminal, so that the first capacitor C can be charged through the first node, the first diode D and the first resistor R1, when the first MOS transistor Sbuck is turned off, the second diode Dbuck is turned on, and although the voltage Vn of the first node is lower than the voltage Vo of the positive output terminal, the reverse cut of the first diode D can prevent the charge on the first capacitor C from flowing back.
Fig. 9 is a circuit diagram of a sixth embodiment of the charging device and the secondary battery of the present invention, which is different from the embodiment shown in fig. 7 only in that: the output stage of the voltage conversion module is an LLC circuit, the LLC circuit comprises a third diode D11, a fourth diode D12, an output capacitor Co and a first transformer with a secondary winding provided with a center tap, and the center tap of the secondary winding of the first transformer is a positive output end of the voltage conversion module and is used for being connected with the positive end of the storage battery through an anti-reverse module; the cathode of the fourth diode D12 is connected to the dotted terminal of the secondary winding of the first transformer, the cathode of the third diode D11 is connected to the dotted terminal of the secondary winding of the first transformer, the anode of the fourth diode D12 is connected to the anode of the third diode D11 and serves as the negative output terminal of the voltage conversion module, and the output capacitor Co is connected between the positive and negative output terminals of the voltage conversion module. The cathode of the fourth diode D12 is a first node.
In this embodiment, the first node is selected at the negative terminal of the secondary rectifying diode (fourth diode D12) of the LLC circuit, so that when the ac voltage output by the previous stage is in the positive half cycle, the third diode D11 is turned on, and at this time, the voltage Vn at the first node and the voltage Vo at the output terminal satisfy: vn is 2Vo, so the first capacitor C can be charged to generate the required driving voltage. When the ac voltage output by the previous stage is in the negative half cycle, the fourth diode D12 is turned on, and at this time, the voltage Vn at the first node is 0, and the first diode D is turned off in the reverse direction, so as to prevent the charge on the first capacitor C from flowing back to the first node.
Fig. 10 is a circuit diagram of a seventh embodiment of a charging device and a storage battery according to the present invention, which is different from the embodiment shown in fig. 7 only in that: the output stage of the voltage conversion module is a phase-shifted full-bridge circuit, and it should be noted that, compared with the LLC circuit shown in fig. 9, the phase-shifted full-bridge circuit of this embodiment has the following main differences: the primary side network of the transformer omits an inductor and a resonant capacitor; the secondary network of the transformer adds a filter inductance (second inductance L2). Specifically, the phase-shifted full-bridge circuit comprises: the fifth diode D21, the sixth diode D22, the second inductor L2, the output capacitor Co and a second transformer with a secondary winding having a center tap, wherein the center tap of the secondary winding of the second transformer is connected to a first end of the second inductor L2, and a second end of the second inductor L2 is a positive output end of the voltage conversion module and is used for being connected to a positive end of the storage battery through the anti-reverse module; the cathode of the sixth diode D22 is connected to the dotted terminal of the secondary winding of the second transformer, the cathode of the fifth diode D21 is connected to the dotted terminal of the secondary winding of the second transformer, the anode of the sixth diode D22 is connected to the anode of the fifth diode D21, and serves as the negative output terminal of the voltage conversion module, and the output capacitor Co is between the positive and negative output terminals of the voltage conversion module. The cathode of the sixth diode D22 is a first node.
In this embodiment, the first node is selected at the negative terminal of the secondary rectifying diode (sixth diode D22) of the phase-shifted full-bridge circuit, so that when the fifth diode D21 is turned on, the voltage Vn at the first node and the voltage Vo at the positive output terminal satisfy: vn is 2Vo, so the first capacitor C can be charged to generate the required driving voltage. When the sixth diode D22 is turned on, the voltage Vn at the first node is 0, and the first diode D is turned off in the reverse direction, so that the charge on the first capacitor C is prevented from flowing back to the first node.
Finally, it should be noted that, although the anti-reverse modules in the above embodiments are described by taking the MOS transistor SF as an example, it should be understood that other types of switching transistors may be used for the MOS transistor SF, and the first end of the switching transistor is connected to the positive output terminal of the voltage conversion module, the second end of the first switching transistor is connected to the positive terminal of the battery, and the control end of the first switching transistor is connected to the output terminal of the driving circuit. In addition, in other embodiments, the reverse prevention module may further include a seventh diode and a relay, wherein an anode of the seventh diode is connected to the positive output terminal of the voltage conversion module, a cathode of the seventh diode is connected to the positive terminal of the battery, the relay is connected in parallel to the seventh diode, and the driving power generation circuit drives the relay through the driving circuit.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A driving power generation circuit of a charging device for driving a reverse blocking prevention module through a driving circuit, the driving power generation circuit comprising: a first diode (D) and a first capacitor (C), wherein the anode of the first diode (D) is connected to the first node of the voltage conversion module of the charging device, the cathode of the first diode (D) is connected to the first end of the first capacitor (C), the second end of the first resistor (C) is connected to the positive output end of the voltage conversion module of the charging device, and,
the voltage of the first node is higher than the voltage of the positive output terminal during at least part of the period of operation of the voltage conversion module.
2. The drive power generation circuit according to claim 1, further comprising a first resistor (R1), and the first resistor (R1) is connected between the cathode of the first diode (D) and the first terminal of the first capacitor (C).
3. The driving power generating circuit according to claim 2, further comprising a second resistor (R2), wherein the second resistor (R2) is connected in parallel across the first capacitor (C).
4. The driving power generating circuit according to any one of claims 1 to 3, further comprising a zener diode (Dz), wherein a cathode of the zener diode (Dz) is connected to the first terminal of the first capacitor (C), and an anode of the zener diode (Dz) is connected to the second terminal of the first capacitor (C).
5. A charging device comprises a voltage conversion module and an anti-reverse module, and is characterized by further comprising:
a drive circuit; and
the drive power generating circuit of any one of claims 1 to 4.
6. The charging device according to claim 5, wherein the output stage of the voltage conversion module is a BUCK step-down circuit, wherein the BUCK step-down circuit comprises a first MOS transistor (Ssuck), a first inductor (L1), a second diode (Dbuck) and an output capacitor (Co), a drain of the first MOS transistor (Ssuck) is connected to a positive terminal of an output voltage of a previous stage, a source of the first MOS transistor (Ssuck) is connected to a first terminal of the first inductor (L1), and a second terminal of the first inductor (L1) is a positive output terminal of the voltage conversion module and is used for connecting a positive terminal of a storage battery through the anti-reverse module; the negative end of the previous-stage output voltage is the negative output end of the voltage conversion module and is used for being connected with the negative end of the storage battery; the cathode of the second diode (Dbuck) is connected with the first end of the first inductor (L1), the first end of the output capacitor (Co) is connected with the second end of the first inductor (L1), and the anode of the second diode (Dbuck) and the second end of the output capacitor (Co) are respectively connected with the negative output end of the voltage conversion module; furthermore, it is possible to provide a liquid crystal display device,
the first terminal of the first inductor (L1) is the first node.
7. The charging device according to claim 5, wherein the output stage of the voltage conversion module is an LLC circuit, and the LLC circuit comprises a third diode (D11), a fourth diode (D12), an output capacitor (Co), and a first transformer with a center tap secondary winding, wherein the center tap secondary winding of the first transformer is the positive output terminal of the voltage conversion module and is used for connecting the positive terminal of the storage battery through the anti-reverse module; the cathode of the fourth diode (D12) is connected with the homonymous terminal of the secondary winding of the first transformer, the cathode of the third diode (D11) is connected with the synonym terminal of the secondary winding of the first transformer, the anode of the fourth diode (D12) is connected with the anode of the third diode (D11) and serves as the negative output terminal of the voltage conversion module, and the output capacitor (Co) is connected between the positive output terminal and the negative output terminal of the voltage conversion module; furthermore, it is possible to provide a liquid crystal display device,
the cathode of the fourth diode (D12) is the first node.
8. The charging device of claim 5, wherein the output stage of the voltage conversion module is a phase-shifted full-bridge circuit, and the phase-shifted full-bridge circuit comprises: a fifth diode (D21), a sixth diode (D22), a second inductor (L2), an output capacitor (Co) and a second transformer with a center tap on a secondary winding, wherein the center tap of the secondary winding of the second transformer is connected with a first end of the second inductor (L2), and a second end of the second inductor (L2) is a positive output end of the voltage conversion module and is used for being connected with the positive end of a storage battery through the anti-reverse module; the cathode of the sixth diode (D22) is connected with the homonymous terminal of the secondary winding of the second transformer, the cathode of the fifth diode (D21) is connected with the synonym terminal of the secondary winding of the second transformer, the anode of the sixth diode (D22) is connected with the anode of the fifth diode (D21) and serves as the negative output terminal of the voltage conversion module, and the output capacitor (Co) is connected between the positive output terminal and the negative output terminal of the voltage conversion module; furthermore, it is possible to provide a liquid crystal display device,
the cathode of the sixth diode (D22) is the first node.
9. The charging device according to any one of claims 5 to 8, wherein the reverse prevention module comprises a seventh diode and a relay, wherein an anode of the seventh diode is connected to the positive output terminal of the voltage conversion module, a cathode of the seventh diode is connected to the positive terminal of the secondary battery, the relay is connected in parallel to the seventh diode, and the driving power generation circuit drives the relay through the driving circuit.
10. The charging device according to any one of claims 5 to 8, wherein the reverse prevention module comprises a first switch tube, a first end of the first switch tube is connected to the positive output end of the voltage conversion module, a second end of the first switch tube is connected to the positive end of the storage battery, and a control end of the first switch tube is connected to the output end of the driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806422.0A CN110601323B (en) | 2019-08-29 | Charging device and driving power supply generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806422.0A CN110601323B (en) | 2019-08-29 | Charging device and driving power supply generating circuit |
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| CN110601323A true CN110601323A (en) | 2019-12-20 |
| CN110601323B CN110601323B (en) | 2024-07-05 |
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| EP0657947A1 (en) * | 1993-12-07 | 1995-06-14 | Nippondenso Co., Ltd. | Power converter |
| CN103354415A (en) * | 2013-06-28 | 2013-10-16 | 江苏浩峰汽车附件有限公司 | N-channel MOS tube grid electrode suspension drive circuit used to prevent reversed connection |
| CN103633704A (en) * | 2013-12-10 | 2014-03-12 | 惠州天能源科技有限公司 | Photovoltaic charge circuit preventing PV reverse connection and providing improved charging efficiency |
| CN106026277A (en) * | 2016-07-01 | 2016-10-12 | 北京云迹科技有限公司 | Controllable battery charging circuit and charger |
| CN210839041U (en) * | 2019-08-29 | 2020-06-23 | 深圳英驱新能源有限公司 | Charging device and driving power generation circuit |
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