CN206759133U - A kind of charging system with overvoltage protection - Google Patents
A kind of charging system with overvoltage protection Download PDFInfo
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- CN206759133U CN206759133U CN201720356705.6U CN201720356705U CN206759133U CN 206759133 U CN206759133 U CN 206759133U CN 201720356705 U CN201720356705 U CN 201720356705U CN 206759133 U CN206759133 U CN 206759133U
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Abstract
A kind of charging system with overvoltage protection, belongs to charger technologies field.A kind of charging system with overvoltage protection of the utility model includes bridge rectifier, square wave generation circuit, LLC resonant transform circuits, positive negative pulse stuffing circuit, overvoltage crowbar, the rechargeable battery being sequentially connected；Ac input end exports direct current to square wave generation circuit through bridge rectifier.The utility model is simple in construction, and using human oriented design high-frequency soft switch circuit and positive negative pulse stuffing circuit, charging effect is good, has certain battery repairing function, and is protected using overvoltage crowbar to exporting to the voltage of rechargeable battery, improves battery performance.
Description
Technical field
It the utility model is related to charger technologies field, more particularly to a kind of charging system with overvoltage protection.
Background technology
Existing charger species is various, and charging performance is bad, especially the charger for electromobile battery charging,
Realize the circuit structure complexity of charge function and charge efficiency is low, electric energy loss is big, while battery is caused to damage, and reduces battery
Service life.When output exceedes reference voltage to the voltage of rechargeable battery, charging-cell temperature rise, battery performance is poor, holds
It is easily caused electric elements damage.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of Charging with overvoltage protection
System.
The utility model provides a kind of charging system with overvoltage protection, including be sequentially connected bridge rectifier,
Square wave generation circuit, LLC resonant transform circuits, positive negative pulse stuffing circuit, overvoltage crowbar, rechargeable battery；Ac input end passes through
Bridge rectifier exports direct current to square wave generation circuit；Wherein, the LLC resonant transform circuits include transformer, located at change
Resonant capacitance, the first inductance, the second inductance of depressor primary side side, the resonant capacitance are connected on the side with first inductance
Between wave generation circuit and transformer primary avris, second inductance in parallel is in transformer primary avris, transformer secondary side and institute
State the connection of positive negative pulse stuffing circuit；The positive negative pulse stuffing circuit includes the 3rd triode, the 4th triode, the 5th resistance, the 6th electricity
Resistance, the 7th resistance, the 8th resistance, the 4th electric capacity, the base stage and emitter stage of the 3rd triode are all connected with the LLC resonance and become
Changing circuit, the colelctor electrode of the 3rd triode connects the base stage of the 4th triode through the 5th resistance, and the described 3rd
The grounded emitter of triode；The emitter stage of 4th triode is through the 6th resistance and also successively through the described 4th
Electric capacity and the 7th resistance are connected with output end, and the colelctor electrode of the 4th triode is through the 8th resistance eutral grounding；It is described
Overvoltage crowbar includes the 18th resistance, fuse, thyristor, on-off circuit, controllable silicon drive circuit；The positive and negative arteries and veins
The anode that circuit connects the thyristor through the fuse is rushed, the anode of the thyristor is through on-off circuit and charging electricity
Pond connects；The controllable silicon drive circuit connects the control pole of the thyristor, the control pole and negative electrode of the thyristor
Between in parallel 18th resistance.
The charging system, utilize LLC resonant transform circuits so that rechargeable battery whole process is operated under sofe switch pattern, is born
When load and input change greatly, frequency change still very little, and switching Zero voltage transition in full-load range.Charging effect is good, tool
There is certain battery repairing function.Reach devulcanization effect, and negative pulse using the pulse circuit of positive negative pulse stuffing circuit simultaneously
Circuit accelerates charging rate and reduces battery temperature rise, further increases the charge efficiency and performance of battery.And pass through overvoltage
Protection circuit carries out overvoltage protection to the voltage exported to battery, in case damage battery, influences charging performance.
Preferably, it is also associated with LC filter circuits between the LLC resonant transform circuits and the positive negative pulse stuffing circuit.
Preferably, the LC filter circuits include the 3rd inductance, the 3rd electric capacity；3rd inductance is connected on transformer
Between secondary side and the positive negative pulse stuffing circuit, the 3rd electric capacity is connected in parallel on transformer secondary side.
Preferably, the drive circuit includes driving power, the 4th metal-oxide-semiconductor, comparison circuit, driving transformer；It is described
Driving power is successively through the comparison circuit, the 4th metal-oxide-semiconductor, the driving transformer to the thyristor.
Preferably, the thyristor is bidirectional triode thyristor pipe.
Preferably, the 4th metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
Preferably, the square wave generation circuit includes switch power source driving circuit, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the
Two diodes, the 3rd diode, the negative electrode of second diode are connected with the drain electrode of first metal-oxide-semiconductor, and the described 2nd 2
The anode of pole pipe connects the source electrode of first metal-oxide-semiconductor；The drain electrode of first metal-oxide-semiconductor connects the bridge rectifier；Institute
State the draining of the second metal-oxide-semiconductor, the source electrode of first metal-oxide-semiconductor is connected with the resonant capacitance respectively；The source of second metal-oxide-semiconductor
Pole connects second inductance and is grounded；The negative electrode of drain electrode connection the 3rd diode of second metal-oxide-semiconductor, the described 3rd
The anode of diode connects the source electrode of second metal-oxide-semiconductor；The gate pole of first metal-oxide-semiconductor, the gate pole of second metal-oxide-semiconductor connect
Connect the switch power source driving circuit.
Preferably, the switch power source driving circuit includes driving chip and its peripheral circuit.
Preferably, the switch power source driving circuit also includes under-voltage protecting circuit, the under-voltage protecting circuit includes
The 12nd resistance, the 13rd resistance being connected between driving chip and the bridge rectifier, and with the 13rd resistance
The 14th resistance for connecting and being grounded.
The utility model has the advantages that：
A kind of charging system with overvoltage protection of the utility model, it is simple in construction, opened using human oriented design high frequency is soft
Powered-down road and positive negative pulse stuffing circuit, charging effect is good, has certain battery repairing function, and utilize overvoltage crowbar pair
Export and protected to the voltage of rechargeable battery, improve battery performance.
Brief description of the drawings
Fig. 1 is a kind of system block diagram of the charging system with overvoltage protection of the utility model；
Fig. 2 is square wave generation circuit, LLC resonant transform circuits, the circuit diagram of LC filter circuits in Fig. 1；
Fig. 3 is the circuit diagram of positive negative pulse stuffing circuit in Fig. 1；
Fig. 4 is the circuit diagram of overvoltage crowbar in Fig. 1.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 show a kind of system block diagram of the charging system with overvoltage protection.The charging with overvoltage protection
System include bridge rectifier, square wave generation circuit, LLC resonant transform circuits, positive negative pulse stuffing circuit, overvoltage crowbar,
Rechargeable battery.The alternating current of external world's input is converted to direct current output to side after the bridge rectifier rectification, filtering process
Wave generation circuit.The square wave generation circuit is sequentially connected the LLC resonant transform circuits, the positive negative pulse stuffing circuit, overvoltage
Protection circuit, rechargeable battery.
Such as Fig. 2, to produce a satisfactory square-wave signal of frequency, the square wave produces the square wave generation circuit
Circuit includes switch power source driving circuit, the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the second diode D2, the 3rd diode D3.Institute
The negative electrode for stating the second diode D2 is connected with the drain electrode of the first metal-oxide-semiconductor M1, the anode connection institute of the second diode D2
The first metal-oxide-semiconductor M1 source electrode is stated, the drain electrode of the first metal-oxide-semiconductor M1 connects the bridge rectifier.The second metal-oxide-semiconductor M2
Drain, the source electrode of the first metal-oxide-semiconductor M1 is connected with the resonant capacitance Cx respectively, the source electrode of the second metal-oxide-semiconductor M2 connects
Meeting the second inductance L2 and be grounded, the drain electrode of the second metal-oxide-semiconductor M2 connects the negative electrode of the 3rd diode D3, and described the
Three diode D3 anode connects the source electrode of the second metal-oxide-semiconductor M2, gate pole, second metal-oxide-semiconductor of the first metal-oxide-semiconductor M1
M2 gate pole connects the switch power source driving circuit.
The switch power source driving circuit includes driving chip and its peripheral circuit.The driving chip uses L6599D,
The first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2 opening and closing, driving LLC resonant transform circuit work are driven by 15,11 pins.This is opened
Powered-down source driving circuit also includes under-voltage protecting circuit, and the under-voltage protecting circuit includes being connected to driving chip and the bridge-type
The 12nd resistance, the 13rd resistance between rectification circuit, and the 14th resistance for being connected and being grounded with the 13rd resistance.Drive
Under-voltage protecting circuit is connected with 7 pin of dynamic chip, system is automatically into guard mode when brownout.
The LLC resonant transform circuits include transformer, the resonant capacitance Cx located at transformer primary avris, the first inductance
L1, the second inductance L2.The resonant capacitance Cx and the first inductance L1 is connected on the square wave generation circuit and transformer primary
Between avris, the second inductance L2 is connected in parallel on transformer primary avris, and transformer secondary side is connected with the positive negative pulse stuffing circuit.
Wherein, the no-load voltage ratio n of transformer：1 can preset as needed, obtain currently setting power pair by LLC resonant transform circuits
The electric current answered.
In order to filter out the high frequency and spike of LLC resonant transform circuit output currents, in the LLC resonant transform circuits and institute
State and be connected with LC filter circuits between positive negative pulse stuffing circuit.The filter circuit includes the 3rd inductance L3, the 3rd electric capacity C3.It is described
3rd inductance L3 is connected between transformer secondary side and the positive negative pulse stuffing circuit, and the 3rd electric capacity C3 is connected in parallel on transformer
Secondary side.
The electric current after the positive negative pulse stuffing circuit reception processing, it is positive negative pulse stuffing electricity by the current transformation after processing such as Fig. 3
Stream, and positive negative impulse current is exported to rechargeable battery, to prevent and eliminate the crystalline chalcogenide on battery pole plates, so as to extend
The life-span of battery.The positive negative pulse stuffing circuit includes the 3rd triode Q3, the 4th triode Q4, the 5th resistance R5, the 6th resistance
R6, the 7th resistance R7, the 8th resistance R8, the 4th electric capacity C4.The base stage and emitter stage of the 3rd triode Q3 is all connected with described
LLC resonant transform circuits, the colelctor electrode of the 3rd triode Q3 is through the 5th resistance R5 connections the 4th triode Q3
Base stage, the grounded emitter of the 3rd triode Q3.The emitter stage of the 4th triode Q4 is through the 6th resistance R6
It is connected with output end, emitter stage the 4th electric capacity C4 and the 7th resistance R7 and the output successively of the 4th triode Q4
End connection, the colelctor electrode of the 4th triode Q4 are grounded through the 8th resistance R8.Polarized in charging process caused by battery
Voltage can hinder the charging of battery in itself, using positive negative pulse stuffing circuit in battery charging process, appropriate pause charging, and suitably
Negative pulse is added, negative pulse is the discharge channel for eliminating activation polarization influence, so as to eliminate various polarization rapidly
Voltage so that battery allows to charge using larger electric current in the charging stage, improves charging rate and efficiency.
Such as Fig. 4, the overvoltage crowbar includes the 18th resistance R18, fuse FU, thyristor SCR, switch electricity
Road, controllable silicon drive circuit.Anode of the positive negative pulse stuffing circuit through the fuse FU connections thyristor SCR, institute
The anode for stating controllable silicon SCR is connected through on-off circuit with rechargeable battery.The controllable silicon drive circuit connects the thyristor
SCR control pole, the 18th resistance R18 in parallel between the control pole and negative electrode of the thyristor SCR.The controllable silicon
Drive circuit includes driving power, comparison circuit, the 4th metal-oxide-semiconductor, driving transformer.The driving power is successively through the comparison
Circuit, the 4th metal-oxide-semiconductor, the driving transformer to the thyristor.The thyristor SCR for it is unidirectional or it is two-way can
Control silicone tube.4th metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.Controllable silicon drive circuit is reached and compared in the forward voltage of thyristor
During the voltage threshold of circuit, drive circuit conducting, controllable silicon drive circuit is sent out driving voltage value and become to driving transformer, driving
Depressor triggers thyristor, turns it on.When charging voltage is beyond permission normal range (NR), SCR drive circuits send driving letter
Number, thyristor conducting, fuse FU is blown, by force path of the shut-off output to rechargeable battery.
The above-mentioned circuit not being described in detail, using the common circuit of prior art, will not be repeated here.
Embodiment described above is only that preferred embodiment of the present utility model is described, not new to this practicality
The spirit and scope of type are defined.On the premise of the utility model design conception is not departed from, ordinary people in the field is to this
The all variations and modifications that the technical scheme of utility model is made, the scope of protection of the utility model, this practicality all should be dropped into
New claimed technology contents, all record in detail in the claims.
Claims (9)
1. a kind of charging system with overvoltage protection, it is characterised in that bridge rectifier, square wave including being sequentially connected produce
Raw circuit, LLC resonant transform circuits, positive negative pulse stuffing circuit, overvoltage crowbar, rechargeable battery；Ac input end is whole through bridge-type
Current circuit exports direct current to square wave generation circuit；Wherein, the LLC resonant transform circuits include transformer, located at transformer primary
The resonant capacitance of avris, the first inductance, the second inductance, the resonant capacitance are connected on the square wave with first inductance and produced
Between circuit and transformer primary avris, second inductance in parallel in transformer primary avris, transformer secondary side with it is described positive and negative
Impulse circuit connects；The positive negative pulse stuffing circuit includes the 3rd triode, the 4th triode, the 5th resistance, the 6th resistance, the 7th
Resistance, the 8th resistance, the 4th electric capacity, the base stage and emitter stage of the 3rd triode are all connected with the LLC resonant transform circuits,
The colelctor electrode of 3rd triode connects the base stage of the 4th triode through the 5th resistance, the 3rd triode
Grounded emitter；The emitter stage of 4th triode is through the 6th resistance and also successively through the 4th electric capacity and institute
State the 7th resistance to be connected with output end, the colelctor electrode of the 4th triode is through the 8th resistance eutral grounding；The overvoltage protection
Circuit includes the 18th resistance, fuse, thyristor, on-off circuit, controllable silicon drive circuit；The positive negative pulse stuffing circuit warp
The fuse connects the anode of the thyristor, and the anode of the thyristor is connected through on-off circuit with rechargeable battery；
The controllable silicon drive circuit connects the control pole of the thyristor, in parallel between the control pole and negative electrode of the thyristor
18th resistance.
2. the charging system according to claim 1 with overvoltage protection, it is characterised in that the LLC resonant transformations electricity
LC filter circuits are also associated between road and the positive negative pulse stuffing circuit.
3. the charging system according to claim 2 with overvoltage protection, it is characterised in that the LC filter circuits include
3rd inductance, the 3rd electric capacity；3rd inductance is connected between transformer secondary side and the positive negative pulse stuffing circuit, and described
Three electric capacity are connected in parallel on transformer secondary side.
4. the charging system according to claim 1 with overvoltage protection, it is characterised in that the drive circuit includes driving
Dynamic power supply, the 4th metal-oxide-semiconductor, comparison circuit, driving transformer；The driving power is successively through the comparison circuit, the described 4th
Metal-oxide-semiconductor, the driving transformer to the thyristor.
5. the charging system with overvoltage protection according to claim 1 or 4, it is characterised in that the thyristor is
Bidirectional triode thyristor pipe.
6. the charging system according to claim 4 with overvoltage protection, it is characterised in that the 4th metal-oxide-semiconductor is P ditches
Road metal-oxide-semiconductor.
7. the charging system according to claim 1 with overvoltage protection, it is characterised in that the square wave generation circuit bag
Switch power source driving circuit, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the second diode, the 3rd diode are included, second diode
Negative electrode is connected with the drain electrode of first metal-oxide-semiconductor, and the anode of second diode connects the source electrode of first metal-oxide-semiconductor；Institute
The drain electrode for stating the first metal-oxide-semiconductor connects the bridge rectifier；The draining of second metal-oxide-semiconductor, the source electrode of first metal-oxide-semiconductor
It is connected respectively with the resonant capacitance；The source electrode of second metal-oxide-semiconductor connects second inductance and is grounded；2nd MOS
The drain electrode of pipe connects the negative electrode of the 3rd diode, and the anode of the 3rd diode connects the source electrode of second metal-oxide-semiconductor；
The gate pole of first metal-oxide-semiconductor, the gate pole of second metal-oxide-semiconductor connect the switch power source driving circuit.
8. the charging system according to claim 7 with overvoltage protection, it is characterised in that the Switching Power Supply driving electricity
Road includes driving chip and its peripheral circuit.
9. the charging system according to claim 8 with overvoltage protection, it is characterised in that the Switching Power Supply driving electricity
Road also includes under-voltage protecting circuit, and the under-voltage protecting circuit includes being connected between driving chip and the bridge rectifier
The 12nd resistance, the 13rd resistance, and the 14th resistance for being connected and being grounded with the 13rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720356705.6U CN206759133U (en) | 2017-04-07 | 2017-04-07 | A kind of charging system with overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720356705.6U CN206759133U (en) | 2017-04-07 | 2017-04-07 | A kind of charging system with overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206759133U true CN206759133U (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720356705.6U Expired - Fee Related CN206759133U (en) | 2017-04-07 | 2017-04-07 | A kind of charging system with overvoltage protection |
Country Status (1)
| Country | Link |
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| CN (1) | CN206759133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109703400A (en) * | 2018-09-12 | 2019-05-03 | 张家港市泓溢电源科技有限公司 | A kind of charging circuit for automobile |
-
2017
- 2017-04-07 CN CN201720356705.6U patent/CN206759133U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109703400A (en) * | 2018-09-12 | 2019-05-03 | 张家港市泓溢电源科技有限公司 | A kind of charging circuit for automobile |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20190407 |
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| CF01 | Termination of patent right due to non-payment of annual fee |