CN220066918U - Charging circuit, charging device and charging equipment - Google Patents
Charging circuit, charging device and charging equipment Download PDFInfo
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- CN220066918U CN220066918U CN202320932063.5U CN202320932063U CN220066918U CN 220066918 U CN220066918 U CN 220066918U CN 202320932063 U CN202320932063 U CN 202320932063U CN 220066918 U CN220066918 U CN 220066918U
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- 238000001914 filtration Methods 0.000 claims abstract description 45
- 230000001360 synchronised effect Effects 0.000 claims abstract description 40
- 239000003990 capacitor Substances 0.000 claims description 125
- 229910002601 GaN Inorganic materials 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052744 lithium Inorganic materials 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The embodiment of the utility model provides a charging circuit, a charging device and charging equipment, wherein the charging circuit comprises: the charging circuit comprises a first filtering module, a bridge rectifier module, a second filtering module, a boosting module, a resonance module, a synchronous rectifier module, a first control module, a second control module, a switch module and a protection module, wherein the boosting module comprises a fifth inductor and is used for boosting the charging circuit through the fifth inductor, so that the temperature rise of an MOS tube in the boosting module in the charging circuit can be reduced, and the reliability of the charging circuit when the charging circuit charges a lithium battery is improved.
Description
Technical Field
The utility model relates to the technical field of charging circuits, in particular to a charging circuit, a charging device and charging equipment.
Background
Some lithium battery charging equipment in the prior art is large in size and difficult to miniaturize, and when the boost is realized in the charging circuit, the temperature rise of the MOS tube in the boost circuit is higher, so that the reliability of the charging circuit in charging the lithium battery is reduced.
Disclosure of Invention
The embodiment of the utility model provides a charging circuit, a charging device and charging equipment, so that the temperature rise of an MOS tube in a boosting module in the charging circuit can be reduced, and the reliability of the charging circuit when a lithium battery is charged can be improved.
A first aspect of an embodiment of the present utility model provides a charging circuit, including: the device comprises a first filtering module, a bridge rectifier module, a second filtering module, a boosting module, a resonance module, a synchronous rectifier module, a first control module, a second control module, a switch module and a protection module, wherein,
the input end of the first filtering module is connected with a mains supply port, the output end of the first filtering module is connected with the input end of the bridge rectifier module,
the output end of the bridge rectifier module is connected with the input end of the second filter module, the output end of the second filter module is connected with the input end of the boost module,
the output end of the boosting module is connected with the input end of the resonance module, the first output end of the resonance module is connected with the input end of the synchronous rectification module, the output end of the synchronous rectification module is connected with the first end of the switch module and the first end of the protection module, the second end of the switch module is connected with the output end of the charging circuit,
the control end of the switch module is connected with the second control module, the power input end of the second control module is connected with the second output end of the resonance module,
the second end of the protection module is connected with the first end of the first control module, and the first control module is connected with the control ends of the first filtering module, the bridge rectifier module, the second filtering module, the boosting module, the resonance module and the synchronous rectifier module;
the boosting module comprises a fifth inductor, and is used for boosting the charging circuit through the fifth inductor;
wherein the first filter module comprises a fuse, a first inductor, a second inductor, a first resistor, a second resistor, a first capacitor, a second capacitor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a sixth resistor and a fourth capacitor,
the first end of the fuse is connected with the fire wire port in the mains supply port, the second end of the fuse is connected with the first end of the first resistor and the first end of the first inductor,
the second end of the first inductor is connected with the second end of the second resistor and a zero line port in the mains supply port,
the third end of the first inductor is connected with the first end of the first capacitor, the first end of the second capacitor and the first end of the second inductor,
the fourth end of the first inductor is connected with the second end of the first capacitor, the first end of the third capacitor, the second end of the second inductor and the first end of the second resistor, the second end of the third capacitor is connected with the second end of the second capacitor and then grounded,
the third resistor is connected in series between the second end of the second resistor and the first end of the fourth resistor, the second end of the fourth resistor is connected with the first diode, the first end of the fourth capacitor and the first end of the first control module,
the fifth resistor and the sixth resistor are connected in series between the second end of the first diode and the second end of the fourth capacitor, and the second end of the fourth capacitor is grounded.
In one possible implementation, the boost module includes: a third inductor, a fourth inductor, a second diode, a third diode, a fourth diode, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a first MOS transistor, and a second MOS transistor,
the first end of the second diode is connected with the first end of the third inductor,
the second end of the second diode is connected with the second end of the third diode, the first end of the eighth resistor and the first end of the sixth capacitor through the seventh resistor, the second end of the sixth capacitor is grounded through the seventh capacitor,
the second end of the eighth resistor is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is connected with the second end of the third diode and the second end of the fourth inductor, the first end of the fourth inductor is connected with the second end of the third inductor, the first end of the first MOS tube, the first end of the eighth capacitor, the first end of the second MOS tube and the second end of the first control module, the second end of the eighth capacitor is grounded,
the second end of the first MOS tube is connected with the first end of the ninth resistor,
the second end of the ninth resistor is connected with the second end of the fourth diode, the first end of the thirteenth resistor, the first end of the ninth capacitor, the first end of the fifth diode and the first end of the eleventh resistor, the second end of the eleventh resistor is connected with the second end of the second MOS tube,
the first end of the fourth diode is connected with the third end of the first MOS tube in parallel through the tenth resistor and the third end of the second MOS tube through the twelfth resistor, the fourth end, the fifth end and the sixth end of the first MOS tube are connected and then grounded, the fourth end and the fifth end of the second MOS tube are grounded,
the second end of the thirteenth resistor is connected with the second end of the ninth capacitor and the first end of the fourteenth resistor, and the second end of the fourteenth resistor is connected with the first end of the fifth diode and the third end of the first control module.
In one possible implementation, the protection module includes a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty first resistor, a twenty second resistor, a twenty third resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a sixth diode, a seventh diode, a first optocoupler, and a second optocoupler, wherein,
the first end of the fifteenth resistor is connected with the first output end of the synchronous rectification module and the first end of the sixteenth resistor, the second end of the fifteenth resistor is connected with the first end of the second photoelectric coupler through the sixth diode,
the third end of the second photoelectric coupler is connected with the first end of the first control module,
the second end of the sixteenth resistor is connected with the first end of the seventeenth resistor, the second end of the seventeenth resistor is connected with the first end of the tenth capacitor, the first end of the eleventh capacitor, the first end of the eighteenth resistor, the first end of the nineteenth resistor and the control end of the seventh diode,
the second end of the eighteenth resistor is connected with the second end of the nineteenth resistor and then connected with the first equipotential end,
the second end of the tenth capacitor is connected with the first end of the twentieth resistor, the second end of the seventh diode, the third end of the first photoelectric coupler and the second end of the twenty-first resistor, the second end of the twentieth resistor is connected with the second end of the eleven capacitor,
the first end of the seventh diode is connected with the first equipotential end,
the first end of the first photoelectric coupler is connected with the first end of the twenty-first resistor and the second end of the twenty-second resistor, the first end of the twenty-second resistor is connected with the second output end of the synchronous rectification module,
the third end of the first photoelectric coupler is connected with the first end of the twelve capacitors and the fourth end of the first control module, the second end of the twelfth capacitor is connected with the second end of the twenty-third resistor and then grounded, and the first end of the twenty-third resistor is connected with the fourth end of the first photoelectric coupler.
In one possible implementation manner, the first photoelectric coupler is used for being disconnected when the current of the second output end of the synchronous rectification module is larger than a preset current so as to cut off the power supply of the second output end of the synchronous rectification module to the first control module.
In one possible implementation manner, the second photocoupler is configured to be disconnected when the current of the first output end of the synchronous rectification module is greater than a preset current, so as to cut off a link between the first output end of the synchronous rectification module and the first end of the first control module.
In one possible implementation, the first MOS transistor and the second MOS transistor include gallium nitride MOS transistors.
In one possible implementation, the second filtering module includes a PI-type filtering module.
A second aspect of an embodiment of the utility model provides a charging device comprising a circuit board and a charging circuit as claimed in any one of the first aspects.
A second aspect of an embodiment of the present utility model provides a charging apparatus comprising a housing and a charging device as described in the second aspect, the charging device being disposed within the housing.
The embodiment of the utility model has at least the following beneficial effects:
the charging circuit comprises a first filtering module, a bridge rectifier module, a second filtering module, a boosting module, a resonance module, a synchronous rectifier module, a first control module, a second control module, a switch module and a protection module, wherein the input end of the first filtering module is connected with a mains supply port, the output end of the first filtering module is connected with the input end of the bridge rectifier module, the output end of the bridge rectifier module is connected with the input end of the second filtering module, the output end of the second filtering module is connected with the input end of the boosting module, the output end of the boosting module is connected with the input end of the resonance module, the first output end of the resonance module is connected with the input end of the synchronous rectifier module, the output end of the synchronous rectifier module is connected with the first end of the switch module and the first end of the protection module, the second end of the switch module is connected with the output end of the charging circuit, the control end of the switch module is connected with the second control module, the power input end of the second control module is connected with the second output end of the resonance module, the second end of the protection module is connected with the first end of the first control module, the first control module is connected with the first filter module, the bridge rectifier module, the second filter module, the boosting module, the resonance module and the control end of the synchronous rectifier module, the boosting module comprises a fifth inductor, the boosting module is used for boosting the charging circuit through the fifth inductor, the first filter module comprises a fuse, a first inductor, a second inductor and a first resistor, the voltage boosting circuit comprises a first resistor, a first capacitor, a second capacitor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a sixth resistor and a fourth capacitor, wherein the first end of a fuse is connected with a live wire port in a mains supply port, the second end of the fuse is connected with the first end of the first resistor and the first end of the first resistor, the second end of the first inductor is connected with the second end of the second resistor and a zero line port in the mains supply port, the third end of the first inductor is connected with the first end of the first capacitor, the first end of the second capacitor and the first end of the second inductor, the first end of the third capacitor, the second end of the second inductor and the first end of the second resistor are connected, the second end of the third capacitor is connected with the second end of the second capacitor, the second end of the third capacitor is connected with the second end of the second resistor, the second end of the second capacitor is connected with the fourth resistor, the fourth resistor is connected with the fourth resistor, and the fourth resistor is connected with the fourth resistor in series, and the fourth resistor is connected with the fourth resistor.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a charging circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of another charging circuit according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of another charging circuit according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the utility model may be combined with other embodiments.
In order to better understand a charging circuit provided by an embodiment of the present utility model, a brief description of an existing charging circuit is provided below. In the existing charging circuit for charging the lithium battery, in the circuit structure of the boost module, an MOS tube is generally adopted to directly construct the boost circuit, for example, a general boost circuit is adopted, but in the boost circuit, the MOS tube generally has higher temperature rise, so that the stability of the MOS tube is reduced, meanwhile, the general boost circuit is adopted, and a general MOS tube is adopted, so that the condition of higher internal resistance is possibly existed, and the reduction of the charging efficiency is caused.
In order to solve the above problems, the embodiment of the utility model provides a charging circuit, in which boost regulation is performed through a fifth inductor in a boost module, so that the temperature rise of an MOS tube in the boost module is reduced, and the stability is improved.
Referring to fig. 1, fig. 1 is a schematic diagram of a charging circuit according to an embodiment of the utility model. As shown in fig. 1, the charging circuit includes: a first filtering module 1, a bridge rectifying module 2, a second filtering module 3, a boosting module 4, a resonance module 5, a synchronous rectifying module 6, a first control module 7, a second control module 8, a switching module 9 and a protection module 10, wherein,
the input end of the first filtering module 1 is connected with a mains supply port, the output end of the first filtering module 1 is connected with the input end of the bridge rectifier module 2,
the output end of the bridge rectifier module 2 is connected with the input end of the second filter module 3, the output end of the second filter module 3 is connected with the input end of the boost module 4,
the output end of the boosting module 4 is connected with the input end of the resonance module 5, the first output end of the resonance module 5 is connected with the input end of the synchronous rectification module 6, the output end of the synchronous rectification module 6 is connected with the first end of the switch module 9 and the first end of the protection module 10, the second end of the switch module 9 is connected with the output end of the charging circuit,
the control end of the switch module 9 is connected with the second control module 8, the power input end of the second control module 8 is connected with the second output end of the resonance module 5,
the second end of the protection module 10 is connected with the first end of the first control module 7, and the first control module 7 is connected with the control ends of the first filtering module 1, the bridge rectifier module 2, the second filtering module 3, the boosting module 4, the resonance module 5 and the synchronous rectifier module 6;
the boost module 4 comprises a fifth inductor L5 and a seventh inductor L7, and the boost module 4 is configured to boost the charging circuit through the fifth inductor and the seventh inductor;
the boosting module 4 comprises a fifth inductor L5, and the boosting module 4 is configured to boost the charging circuit through the fifth inductor L5;
the first filtering module 1 comprises a fuse 10, a first inductor L1, a second inductor L2, a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first diode D1, a sixth resistor R6 and a fourth capacitor C4,
a first end of the fuse 10 is connected to a fire wire port of the mains supply ports, a second end of the fuse 10 is connected to a first end of the first resistor R1 and a first end of the first inductor L1,
the second end of the first inductor L1 is connected with the second end of the second resistor R2 and a zero line port in the mains supply port,
the third end of the first inductor L1 is connected with the first end of the first capacitor C1, the first end of the second capacitor C2 and the first end of the second inductor L2,
the fourth end of the first inductor L1 is connected to the second end of the first capacitor C1, the first end of the third capacitor C3, the second end of the second inductor L2, and the first end of the second resistor R2, the second end of the third capacitor C3 is connected to the second end of the second capacitor C2 and then grounded,
the third resistor R3 is connected in series between the second end of the second resistor R2 and the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected with the first diode D1, the first end of the fourth capacitor C4 and the first end of the first control module,
the fifth resistor R5 and the sixth resistor R6 are connected in series between the second end of the first diode D1 and the second end of the fourth capacitor C4, and the second end of the fourth capacitor C4 is grounded.
Wherein the second filtering module 3 comprises a PI-type filtering module. Specifically, PI filters and the like are possible. Therefore, the low-frequency electromagnetic interference in the charging circuit can be suppressed, and the stability of the charging circuit is improved. The fifth inductance L5 is not shown in fig. 1, and its specific circuit configuration is shown in fig. 3.
The first filtering module 1 can form an EMI filtering circuit, so that high-frequency electromagnetic interference generated after the mains supply input end is connected to the mains supply can be restrained, and the stability of the charging circuit is improved.
In this example, the charging circuit includes a first filtering module, a bridge rectifier module, a second filtering module, a boost module, a resonance module, a synchronous rectifier module, a first control module, a second control module, a switch module and a protection module, where the input end of the first filtering module is connected to the mains supply port, the output end of the first filtering module is connected to the input end of the bridge rectifier module, the output end of the bridge rectifier module is connected to the input end of the second filtering module, the output end of the second filtering module is connected to the input end of the boost module, the output end of the boost module is connected to the input end of the boost module, the first output end of the synchronous rectifier module is connected to the input end of the synchronous rectifier module, the output end of the synchronous rectifier module is connected to the first end of the switch module, the first end of the protection module is connected to the first end of the protection module, the control end of the switch module is connected to the second control module, the output end of the second filtering module is connected to the input end of the second filtering module, the output end of the second filtering module is connected to the boost module, the output end of the second filtering module is connected to the first input end of the boost module, the first filter module is connected to the first input end of the first filter module, the first filter module is connected to the first output end of the first filter module, and second filter module, and the first output end of the first filter module is connected to the first output end of the first and second output end of the first and the first end of the fuse 10 is connected with the live wire port in the mains supply port, the second end of the fuse 10 is connected with the first end of the first resistor R1 and the first end of the first inductor L1, the second end of the first inductor L1 is connected with the second end of the second resistor R2 and the zero line port in the mains supply port, the third end of the first inductor L1 is connected with the first end of the first capacitor C1, the first end of the second capacitor C2 and the first end of the second inductor L2, the fourth end of the first inductor L1 is connected to the second end of the first capacitor C1, the first end of the third capacitor C3, the second end of the second inductor L2, and the first end of the second resistor R2, the second end of the third capacitor C3 is connected to the second end of the second capacitor C2 and then grounded, the third resistor R3 is connected in series between the second end of the second resistor R2 and the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the first diode D1, the first end of the fourth capacitor C4, and the first end of the first control module, the fifth resistor R5 and the sixth resistor R6 are connected in series between the second end of the first diode D1 and the second end of the fourth capacitor C4, and the second end of the fourth capacitor C4 is grounded, so that the voltage rise in the voltage boost module can be reduced by the fifth inductor, the reliability of the charging circuit when the lithium battery is charged is improved.
In one possible implementation, as shown in fig. 2, the boosting module includes: a third inductor L3, a fourth inductor L4, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R15, a first MOS transistor M1 and a second MOS transistor M2, wherein,
the first end of the second diode D2 is connected to the first end of the third inductor L3,
the second end of the second diode D2 is connected to the second end of the third diode D3, the first end of the eighth resistor R8, and the first end of the sixth capacitor C6 through the seventh resistor R7, the second end of the sixth capacitor C6 is grounded through the seventh capacitor,
the second end of the eighth resistor R8 is connected to the first end of the fifth capacitor C5, the second end of the fifth capacitor C5 is connected to the second end of the third diode D3 and the second end of the fourth inductor L4, the first end of the fourth inductor L4 is connected to the second end of the third inductor L3, the first end of the first MOS transistor M1, the first end of the eighth capacitor C8, the first end of the second MOS transistor M2 and the second end of the first control module, the second end of the eighth capacitor C8 is grounded,
the second end of the first MOS transistor M1 is connected to the first end of the ninth resistor R9,
the second end of the ninth resistor R9 is connected to the second end of the fourth diode D4, the first end of the thirteenth resistor R13, the first end of the ninth capacitor C9, the first end of the fifth diode D5, the first end of the eleventh resistor R11, the second end of the eleventh resistor R11 is connected to the second end of the second MOS transistor M2,
the first end of the fourth diode D2 is connected in parallel with the third end of the first MOS transistor M1 through the tenth resistor R10, and is connected with the third end of the second MOS transistor M2 through the twelfth resistor R12, the fourth end, the fifth end and the sixth end of the first MOS transistor M1 are connected and then grounded, the fourth end and the fifth end of the second MOS transistor M2 are grounded,
the second end of the thirteenth resistor R13 is connected to the second end of the ninth capacitor C9 and the first end of the fourteenth resistor R15, and the second end of the fourteenth resistor R15 is connected to the first end of the fifth diode and the third end of the first control module.
When the charging circuit works, the output current of the booster circuit is obtained by the current of the fifth inductor L5 due to the fifth inductor L5, so that the output power of the charging circuit can be improved in an inductive mode, meanwhile, the temperature rise of the first MOS tube M1 and the second MOS tube M2 is reduced, and the reliability and the stability of the charging circuit are improved.
In one possible implementation, as shown in fig. 3, the protection module includes a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty first resistor R21, a twenty second resistor R22, a twenty third resistor R23, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a sixth diode D6, a seventh diode D7, a first optocoupler 101, and a second optocoupler 102, where,
a first end of the fifteenth resistor R15 is connected to the first output end of the synchronous rectification module and the first end of the sixteenth resistor R16, a second end of the fifteenth resistor R15 is connected to the first end of the second photocoupler 102 through the sixth diode D6,
a third end of the second optocoupler 102 is connected to a first end of the first control module,
a second end of the sixteenth resistor R16 is connected to a first end of the seventeenth resistor R17, a second end of the seventeenth resistor R17 is connected to a first end of the tenth capacitor C10, a first end of the eleventh capacitor C11, a first end of the eighteenth resistor R18, a first end of the nineteenth resistor R19, a control end of the seventh diode D7,
a second end of the eighteenth resistor R18 is connected to the second end of the nineteenth resistor R19 and then to the first equipotential end,
a second end of the tenth capacitor C10 is connected to a first end of the twentieth resistor R20, a second end of the seventh diode D7, a third end of the first photocoupler 101, a second end of the twenty-first resistor R21, a second end of the twentieth resistor R20 is connected to a second end of the eleven capacitor,
a first terminal of the seventh diode D7 is connected to the first equipotential terminal,
the first end of the first photocoupler 101 is connected with the first end of the twenty-first resistor R21 and the second end of the twenty-second resistor, the first end of the twenty-second resistor R22 is connected with the second output end of the synchronous rectification module,
the third end of the first photocoupler 101 is connected to the first end of the twelve capacitors and the fourth end of the first control module, the second end of the twelfth capacitor C12 is connected to the second end of the twenty-third resistor R23 and then grounded, and the first end of the twenty-third resistor R23 is connected to the fourth end of the first photocoupler 101
The optocoupler 101 in the protection circuit is configured to be turned off when the current at the first output end of the synchronous rectification module 6 is greater than a preset current, so as to cut off the power supply from the first power supply to the first control module 7. Therefore, the power supply to the first control module 7 can be cut off when the output current is too large, so that the first control module 7 is in a short sleep state, and the stability of the charging circuit is improved.
The first photocoupler 101 is configured to be turned off when a current at the second output end of the synchronous rectification module is greater than a preset current, so as to cut off power supplied to the first control module by the second output end of the synchronous rectification module.
The second photoelectric coupler is used for being disconnected when the current of the first output end of the synchronous rectification module is larger than a preset current so as to cut off the link between the first output end of the synchronous rectification module and the first end of the first control module.
In one possible implementation, the first MOS transistor M1 and the second MOS transistor M2 include gallium nitride MOS transistors.
An embodiment of the present utility model provides a charging device comprising a circuit board and a charging circuit as described in any of the preceding embodiments.
An embodiment of the present utility model provides a charging apparatus including a housing and a charging device as described in the foregoing embodiment, the charging device being disposed in the housing.
The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.
Claims (9)
1. A charging circuit, the charging circuit comprising: the device comprises a first filtering module, a bridge rectifier module, a second filtering module, a boosting module, a resonance module, a synchronous rectifier module, a first control module, a second control module, a switch module and a protection module, wherein,
the input end of the first filtering module is connected with a mains supply port, the output end of the first filtering module is connected with the input end of the bridge rectifier module,
the output end of the bridge rectifier module is connected with the input end of the second filter module, the output end of the second filter module is connected with the input end of the boost module,
the output end of the boosting module is connected with the input end of the resonance module, the first output end of the resonance module is connected with the input end of the synchronous rectification module, the output end of the synchronous rectification module is connected with the first end of the switch module and the first end of the protection module, the second end of the switch module is connected with the output end of the charging circuit,
the control end of the switch module is connected with the second control module, the power input end of the second control module is connected with the second output end of the resonance module,
the second end of the protection module is connected with the first end of the first control module, and the first control module is connected with the control ends of the first filtering module, the bridge rectifier module, the second filtering module, the boosting module, the resonance module and the synchronous rectifier module;
the boosting module comprises a fifth inductor, and is used for boosting the charging circuit through the fifth inductor;
wherein the first filter module comprises a fuse, a first inductor, a second inductor, a first resistor, a second resistor, a first capacitor, a second capacitor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a sixth resistor and a fourth capacitor,
the first end of the fuse is connected with the fire wire port in the mains supply port, the second end of the fuse is connected with the first end of the first resistor and the first end of the first inductor,
the second end of the first inductor is connected with the second end of the second resistor and a zero line port in the mains supply port,
the third end of the first inductor is connected with the first end of the first capacitor, the first end of the second capacitor and the first end of the second inductor,
the fourth end of the first inductor is connected with the second end of the first capacitor, the first end of the third capacitor, the second end of the second inductor and the first end of the second resistor, the second end of the third capacitor is connected with the second end of the second capacitor and then grounded,
the third resistor is connected in series between the second end of the second resistor and the first end of the fourth resistor, the second end of the fourth resistor is connected with the first diode, the first end of the fourth capacitor and the first end of the first control module,
the fifth resistor and the sixth resistor are connected in series between the second end of the first diode and the second end of the fourth capacitor, and the second end of the fourth capacitor is grounded.
2. The charging circuit of claim 1, wherein the boost module comprises: a third inductor, a fourth inductor, a second diode, a third diode, a fourth diode, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a first MOS transistor, and a second MOS transistor,
the first end of the second diode is connected with the first end of the third inductor,
the second end of the second diode is connected with the second end of the third diode, the first end of the eighth resistor and the first end of the sixth capacitor through the seventh resistor, the second end of the sixth capacitor is grounded through the seventh capacitor,
the second end of the eighth resistor is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is connected with the second end of the third diode and the second end of the fourth inductor, the first end of the fourth inductor is connected with the second end of the third inductor, the first end of the first MOS tube, the first end of the eighth capacitor, the first end of the second MOS tube and the second end of the first control module, the second end of the eighth capacitor is grounded,
the second end of the first MOS tube is connected with the first end of the ninth resistor,
the second end of the ninth resistor is connected with the second end of the fourth diode, the first end of the thirteenth resistor, the first end of the ninth capacitor, the first end of the fifth diode and the first end of the eleventh resistor, the second end of the eleventh resistor is connected with the second end of the second MOS tube,
the first end of the fourth diode is connected with the third end of the first MOS tube in parallel through the tenth resistor and the third end of the second MOS tube through the twelfth resistor, the fourth end, the fifth end and the sixth end of the first MOS tube are connected and then grounded, the fourth end and the fifth end of the second MOS tube are grounded,
the second end of the thirteenth resistor is connected with the second end of the ninth capacitor and the first end of the fourteenth resistor, and the second end of the fourteenth resistor is connected with the first end of the fifth diode and the third end of the first control module.
3. The charging circuit of claim 2, wherein the protection module comprises a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty first resistor, a twenty second resistor, a twenty third resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a sixth diode, a seventh diode, a first optocoupler, and a second optocoupler, wherein,
the first end of the fifteenth resistor is connected with the first output end of the synchronous rectification module and the first end of the sixteenth resistor, the second end of the fifteenth resistor is connected with the first end of the second photoelectric coupler through the sixth diode,
the third end of the second photoelectric coupler is connected with the first end of the first control module,
the second end of the sixteenth resistor is connected with the first end of the seventeenth resistor, the second end of the seventeenth resistor is connected with the first end of the tenth capacitor, the first end of the eleventh capacitor, the first end of the eighteenth resistor, the first end of the nineteenth resistor and the control end of the seventh diode,
the second end of the eighteenth resistor is connected with the second end of the nineteenth resistor and then connected with the first equipotential end,
the second end of the tenth capacitor is connected with the first end of the twentieth resistor, the second end of the seventh diode, the third end of the first photoelectric coupler and the second end of the twenty-first resistor, the second end of the twentieth resistor is connected with the second end of the eleven capacitor,
the first end of the seventh diode is connected with the first equipotential end,
the first end of the first photoelectric coupler is connected with the first end of the twenty-first resistor and the second end of the twenty-second resistor, the first end of the twenty-second resistor is connected with the second output end of the synchronous rectification module,
the third end of the first photoelectric coupler is connected with the first end of the twelve capacitors and the fourth end of the first control module, the second end of the twelfth capacitor is connected with the second end of the twenty-third resistor and then grounded, and the first end of the twenty-third resistor is connected with the fourth end of the first photoelectric coupler.
4. A charging circuit according to claim 3, wherein the first optocoupler is configured to disconnect when the current at the second output of the synchronous rectification module is greater than a predetermined current, so as to cut off the power supplied from the second output of the synchronous rectification module to the first control module.
5. The charging circuit of claim 4, wherein the second optocoupler is configured to disconnect when a current at the first output of the synchronous rectification module is greater than a preset current to break a link between the first output of the synchronous rectification module and the first end of the first control module.
6. The charging circuit of any one of claims 3-5, wherein the first MOS transistor and the second MOS transistor comprise gallium nitride MOS transistors.
7. The charging circuit of claim 6, wherein the second filtering module comprises a PI-type filtering module.
8. A charging device, characterized in that the device comprises a circuit board and a charging circuit as claimed in any of claims 1-7.
9. A charging apparatus comprising a housing and the charging device of claim 8, the charging device disposed within the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320932063.5U CN220066918U (en) | 2023-04-21 | 2023-04-21 | Charging circuit, charging device and charging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320932063.5U CN220066918U (en) | 2023-04-21 | 2023-04-21 | Charging circuit, charging device and charging equipment |
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| Publication Number | Publication Date |
|---|---|
| CN220066918U true CN220066918U (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320932063.5U Active CN220066918U (en) | 2023-04-21 | 2023-04-21 | Charging circuit, charging device and charging equipment |
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| Country | Link |
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| CN (1) | CN220066918U (en) |
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- 2023-04-21 CN CN202320932063.5U patent/CN220066918U/en active Active
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