CN208797621U - A kind of novel belt crosses the charging circuit of charging protection function - Google Patents
A kind of novel belt crosses the charging circuit of charging protection function Download PDFInfo
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- CN208797621U CN208797621U CN201821471896.1U CN201821471896U CN208797621U CN 208797621 U CN208797621 U CN 208797621U CN 201821471896 U CN201821471896 U CN 201821471896U CN 208797621 U CN208797621 U CN 208797621U
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Abstract
A kind of novel belt disclosed by the utility model crosses the charging circuit of charging protection function, including charging circuit, overcharge protection circuit and rechargeable battery, the overcharge protection circuit is connected between the charging circuit and rechargeable battery, the overcharge protection circuit includes voltage-stabiliser tube VD1, resistance R11, resistance R12, triode Q1 and diode D4, when charging normal, when rechargeable battery BT1 is not yet full of, triode Q1 normally, as charging progresses, charged battery voltage constantly rises, at this time, the voltage at the both ends voltage-stabiliser tube VD1 also constantly rises, when charged battery voltage rises to setting value, voltage-stabiliser tube VD1 reverse-conducting, the base stage of triode Q1 does not have enough to be biased to electric current, triode Q1 exits saturation state and ends, charge circuit is truncated at this time, reached charging protection function , overcharge protection circuit response is rapid, avoids charging process over-voltage from damaging rechargeable battery, plays to be effectively protected and use use as, and circuit structure is practical reliable.
Description
Technical field
The utility model relates to charging control circuit, especially a kind of band overcharges the charging circuit of protection function.
Background technique
At present portable rechargeable lighting apparatus using more and more extensive, be generally built-in with rechargeable battery, make
With in the process, the charging to internal charging battery need to be completed using charger, this is just applied to various types of charging circuits.
In actual use, it due to the charged battery capacity and voltage class difference inside chargeable lighting apparatus, needs
The voltage class of the charger of outfit is also different, for example, if the overtension of charger and be more than rechargeable battery itself electricity
Grade is pressed, then can make the circuit malfunctions between charger and rechargeable battery, rechargeable battery is caused to fail due to over-voltage,
It even can lead to the serious accidents such as rechargeable battery combustion explosion.Some overcharge protection circuits of existing appearance, it is accurate to cannot achieve
Overcharge protection, stability is poor.Therefore, the protection to battery how is better achieved, designs a overcharge protection circuit, this
A great challenge just is proposed to design.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides the charging circuit that a kind of novel belt crosses charging protection function,
Effectively realize the function of overcharging protection, it is reliable and stable.
To achieve the goals above, the technical scheme adopted by the utility model is
A kind of novel belt crosses the charging circuit of charging protection function, including charging circuit, overcharge protection circuit and charging electricity
Pond, the overcharge protection circuit are connected between the charging circuit and rechargeable battery, and the overcharge protection circuit includes pressure stabilizing
Pipe VD1, resistance R11, resistance R12, triode Q1 and diode D4, the cathode output end of the charging circuit and rechargeable battery
Anode is connected with the cathode of voltage-stabiliser tube VD1, and the anode of the voltage-stabiliser tube VD1 is connect with the resistance R11, the resistance R11's
Other end ground connection, the cathode of the rechargeable battery connect the anode of the diode D4, and the cathode of the diode D4 connects institute
The emitter of triode Q1 is stated, the base stage of the triode Q1 is connect with the anode of the voltage-stabiliser tube VD1, the triode Q1's
Collector is grounded by resistance R12.
Further, the anode of the rechargeable battery is connected with protective tube F2.
Further, the overcharge protection circuit further includes having resistance R10 and Light-emitting diode LED 1, the resistance R10
One end connect with the cathode output end of the charging circuit, the other end is connect with the input terminal of the Light-emitting diode LED 1,
The output end of the Light-emitting diode LED 1 is grounded.
Further, the charging circuit includes that DC plugs in charging circuit and Switching Power Supply charging circuit, and the DC inserts charging
Circuit input end external direct current power supply, the external AC power source of Switching Power Supply charging circuit input terminal.
Preferably, it includes DC plug DC1, diode D1 and resistance R1, the DC plug that the DC, which plugs in charging circuit,
The positive pin of DC1 connects the anode of the diode D1, and the negative pin of the DC plug DC1 is grounded, the diode D1's
Cathode connects resistance R1, and the other end of the resistance R1 connects the anode of the rechargeable battery.
Preferably, the Switching Power Supply charging circuit includes bridge rectifier filter BR1, capacitor C1, resistance R2- resistance
R8, diode D2, power-supply controller of electric IC1, capacitor C2 and transformer T1, the cathode output end of the bridge rectifier filter BR1
The first pin of the transformer T1 is connected, cathode output end connects the 4th pin of the transformer T1 and is grounded, described
Capacitor C1 is connected between the cathode output end and cathode output end of the bridge rectifier filter BR1, the transformer T1's
First pin is connected to the anode of the capacitor C2, the cathode ground connection of the capacitor C2, the change by resistance R2 and resistance R3
The second pin of depressor T1 is connected to the Drain pin of the power-supply controller of electric IC1, and the resistance R4 and resistance R5 are connected in parallel
Between the third pin of the transformer T1 and the VDD pin of the power-supply controller of electric IC1, the third of the transformer T1 is drawn
Foot is connect with the anode of the diode D2, the anode of the cathode connection capacitor C2 of the diode D2, the transformer T1's
4th pin is connect by resistance R6 with the VDD pin of the power-supply controller of electric IC1, the NC pin of the power-supply controller of electric IC1
It is connect between CS pin by resistance R7, the CS pin also passes through resistance R8 and is grounded, and the FB of the power-supply controller of electric IC1 draws
Foot is connect with the capacitor C2 anode, the anode of the cathode output end connection rechargeable battery of the transformer T1, cathode output
End ground connection.
Further, the Switching Power Supply charging circuit further includes having diode D3, capacitor C3 and resistance R9, described
The anode of diode D3 is connect with the cathode output end of the transformer T1, and the cathode of the diode D3 is with the capacitor C3's
Anode connection, the cathode ground connection of the capacitor C3, the resistance R9 are connected in parallel to the both ends of the capacitor C3.
Further, the input terminal of the bridge rectifier filter BR1 is equipped with protective tube F1.
The utility model has the beneficial effects that when rechargeable battery BT1 is not yet full of, triode Q1 is normally led when charging normal
Logical, as charging progresses, charged battery voltage constantly rises, at this point, the voltage at the both ends voltage-stabiliser tube VD1 also constantly rises, when
When charged battery voltage rises to setting value, voltage-stabiliser tube VD1 reverse-conducting, the base stage of triode Q1 does not have enough to be biased to electricity
Stream, triode Q1 exit saturation state and end, and charge circuit is truncated at this time, reaches charging protection function, overcharge protection electricity
Road response rapidly, avoids charging process over-voltage from damaging rechargeable battery, plays to be effectively protected and use use as, and circuit structure is real
With reliable.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing.
Fig. 1 is the circuit theory schematic diagram of the utility model.
Specific embodiment
For technology contents, the construction feature, the objects and the effects that the utility model is described in detail, below in conjunction with implementation
Mode simultaneously cooperates attached drawing to be explained in detail.
Referring to Fig. 1, a kind of novel belt provided by the utility model crosses the charging circuit of charging protection function, including charging electricity
Road, overcharge protection circuit and rechargeable battery, overcharge protection circuit are connected between charging circuit and rechargeable battery, overcharge protection
Circuit includes voltage-stabiliser tube VD1, resistance R11, resistance R12, triode Q1 and diode D4, the cathode output end of charging circuit with fill
The anode of battery is connected with the cathode of voltage-stabiliser tube VD1, and the anode of voltage-stabiliser tube VD1 is connect with resistance R11, and resistance R11's is another
End ground connection, the anode of the cathode connection diode D4 of rechargeable battery, the emitter of the cathode connecting triode Q1 of diode D4, three
The base stage of pole pipe Q1 is connect with the anode of voltage-stabiliser tube VD1, and the collector of triode Q1 is grounded by resistance R12, wherein triode
Q1 is the PNP type triode of S8550.
When charging normal, when rechargeable battery BT1 is not yet full of, the base stage of triode Q1 is pulled to ground level by resistance R11,
Triode Q1 normally, as charging progresses, charged battery voltage constantly rises, and Ucb constantly rises, and Ucb voltage is also etc.
Uab is added in the voltage of voltage-stabiliser tube VD1, in addition the voltage of Uab is fixed, i.e., the voltage at the both ends voltage-stabiliser tube VD1 also constantly rises, when
When charged battery voltage rises to setting value, voltage-stabiliser tube VD1 reverse-conducting, the base stage of triode Q1 does not have enough to be biased to electricity
Stream, triode Q1 exit saturation state and end, and charge circuit is truncated at this time, reaches charging protection function, overcharge protection electricity
Road response is rapid.Above-mentioned Uab is the voltage in Fig. 1 between a, b point, and Ucb is the voltage in Fig. 1 between c, b point.
In order to improve the overcurrent protection to rechargeable battery, it is connected with protective tube F2 in the anode of rechargeable battery, passes through insurance
Pipe can guarantee that circuit safety is run.
Further include having resistance R10 and Light-emitting diode LED 1 in above-mentioned overcharge protection circuit, one end of resistance R10 with
The cathode output end of the charging circuit connects, and the other end is connect with the input terminal of Light-emitting diode LED 1, light emitting diode
The output end of LED1 is grounded, and when rechargeable battery is in charged state, 1 electrified light emitting of Light-emitting diode LED plays prompt and makees
With.
In embodiment, charging circuit includes that DC plugs in charging circuit and Switching Power Supply charging circuit, and DC plugs in charging circuit input
Hold external direct current power supply, the external AC power source of Switching Power Supply charging circuit input terminal.
Wherein, it includes DC plug DC1, diode D1 and resistance R1, the positive pin of DC plug DC1 that DC, which plugs in charging circuit,
The anode of diode D1, the negative pin ground connection of DC plug DC1 are connected, the cathode of diode D1 connects resistance R1, resistance R1's
The anode of other end connection rechargeable battery.By DC plug DC1 external direct current power supply, it is charging electricity that DC, which plugs in charging circuit directly,
Pond provides DC charging.
Switching Power Supply charging circuit is Alternating Current Power Supply, specifically, Switching Power Supply charging circuit includes bridge rectifier filter
BR1, capacitor C1, resistance R2- resistance R8, diode D2, power-supply controller of electric IC1, capacitor C2 and transformer T1, bridge rectifier filtering
The first pin of the cathode output end connection transformer T1 of device BR1, cathode output end connect the 4th pin of transformer T1 simultaneously
Ground connection, capacitor C1 are connected between the cathode output end and cathode output end of bridge rectifier filter BR1, and the first of transformer T1
Pin is connected to the anode of capacitor C2, the cathode ground connection of capacitor C2, the second pin of transformer T1 by resistance R2 and resistance R3
It is connected to the Drain pin of power-supply controller of electric IC1, resistance R4 and resistance R5 are connected in the third pin and electricity of transformer T1 in parallel
Between the VDD pin of source controller IC 1, the third pin of transformer T1 is connect with the anode of diode D2, and diode D2's is negative
Pole connects the anode of capacitor C2, and the 4th pin of transformer T1 is connect by resistance R6 with the VDD pin of power-supply controller of electric IC1,
It is connected between the NC pin and CS pin of power-supply controller of electric IC1 by resistance R7, CS pin also passes through resistance R8 and is grounded, power supply control
The FB pin of device IC1 processed is connect with capacitor C2 anode, the anode of the cathode output end connection rechargeable battery of transformer T1, cathode
Output end ground connection, wherein the power-supply controller of electric IC1 that the embodiment uses controls chip, LP3775 type control for LP3775 type
Chip is that high-precision constant current/constant voltage primary side feedback controls chip, being capable of stability contorting output.Pass through bridge rectifier filter
BR1 converts alternating current to direct current, and transformer T1 plays antihypertensive effect.
In addition, Switching Power Supply charging circuit further includes having diode D3, capacitor C3 and resistance R9, the anode of diode D3 with
The cathode output end of transformer T1 connects, and the cathode of diode D3 is connect with the anode of capacitor C3, the cathode ground connection of capacitor C3, electricity
Resistance R9 is connected in parallel to the both ends of capacitor C3.
Further, the input terminal of bridge rectifier filter BR1 is equipped with protective tube F1.
The above, only the preferred embodiment of the utility model and oneself, the utility model is not limited to above-mentioned implementation
Mode, as long as its technical effect for reaching the utility model with identical means, all should belong to the protection scope of the utility model.
Claims (8)
1. a kind of novel belt crosses the charging circuit of charging protection function, including charging circuit, overcharge protection circuit and rechargeable battery
BT1, the overcharge protection circuit are connected between the charging circuit and rechargeable battery BT1, it is characterised in that: described to overcharge guarantor
Protection circuit includes voltage-stabiliser tube VD1, resistance R11, resistance R12, triode Q1 and diode D4, the anode output of the charging circuit
It holds and is connect with the cathode of the anode of rechargeable battery BT1 and voltage-stabiliser tube VD1, anode and the resistance R11 of the voltage-stabiliser tube VD1 connects
It connecing, the other end of resistance R11 ground connection, the cathode of the rechargeable battery BT1 connects the anode of the diode D4, and described two
The cathode of pole pipe D4 connects the emitter of the triode Q1, the anode of the base stage of the triode Q1 and the voltage-stabiliser tube VD1
Connection, the collector of the triode Q1 are grounded by resistance R12.
2. the charging circuit that novel belt according to claim 1 crosses charging protection function, it is characterised in that: the rechargeable battery
The anode of BT1 is connected with protective tube F2.
3. the charging circuit that novel belt according to claim 2 crosses charging protection function, it is characterised in that: described to overcharge protection
Circuit further includes having resistance R10 and Light-emitting diode LED 1, and one end of the resistance R10 and the anode of the charging circuit export
End connection, the other end are connect with the input terminal of the Light-emitting diode LED 1, the output end ground connection of the Light-emitting diode LED 1.
4. the charging circuit that novel belt according to claim 1 crosses charging protection function, it is characterised in that: the charging circuit
Charging circuit and Switching Power Supply charging circuit are inserted including DC, the DC plugs in charging circuit input terminal external direct current power supply, described to open
Close the external AC power source of power charging circuit input terminal.
5. the charging circuit that novel belt according to claim 4 crosses charging protection function, it is characterised in that: the DC inserts charging
Circuit includes the positive pin connection diode D1 of DC plug DC1, diode D1 and resistance R1, the DC plug DC1
Anode, the negative pin ground connection of the DC plug DC1, the cathode of the diode D1 connects resistance R1, the resistance R1's
The other end connects the anode of the rechargeable battery BT1.
6. the charging circuit that novel belt according to claim 4 crosses charging protection function, it is characterised in that: the Switching Power Supply
Charging circuit includes bridge rectifier filter BR1, capacitor C1, resistance R2- resistance R8, diode D2, power-supply controller of electric IC1, electricity
The cathode output end for holding C2 and transformer T1, the bridge rectifier filter BR1 connects the first pin of the transformer T1,
Cathode output end connects the 4th pin of the transformer T1 and is grounded, and the capacitor C1 is connected to the bridge rectifier filter
Between the cathode output end and cathode output end of BR1, the first pin of the transformer T1 is connected by resistance R2 with resistance R3
To the anode of the capacitor C2, the cathode ground connection of the capacitor C2, the second pin of the transformer T1 is connected to the power supply
The Drain pin of controller IC 1, the resistance R4 and resistance R5 be connected in parallel the third pin of the transformer T1 with it is described
Between the VDD pin of power-supply controller of electric IC1, the third pin of the transformer T1 is connect with the anode of the diode D2, institute
The anode of the cathode connection capacitor C2 of diode D2 is stated, the 4th pin of the transformer T1 passes through resistance R6 and the power supply control
The VDD pin of device IC1 processed connects, and is connected between the NC pin and CS pin of the power-supply controller of electric IC1 by resistance R7, described
CS pin also passes through resistance R8 and is grounded, and the FB pin of the power-supply controller of electric IC1 is connect with the capacitor C2 anode, the transformation
The anode of the cathode output end connection rechargeable battery BT1 of device T1, cathode output end ground connection.
7. the charging circuit that novel belt according to claim 6 crosses charging protection function, it is characterised in that: the Switching Power Supply
Charging circuit further includes having the positive and transformer T1 of diode D3, capacitor C3 and resistance R9, the diode D3 just
The connection of pole output end, the cathode of the diode D3 are connect with the anode of the capacitor C3, the cathode ground connection of the capacitor C3, institute
State the both ends that resistance R9 is connected in parallel to the capacitor C3.
8. the charging circuit that novel belt according to claim 6 crosses charging protection function, it is characterised in that: the bridge rectifier
The input terminal of filter BR1 is equipped with protective tube F1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821471896.1U CN208797621U (en) | 2018-09-07 | 2018-09-07 | A kind of novel belt crosses the charging circuit of charging protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821471896.1U CN208797621U (en) | 2018-09-07 | 2018-09-07 | A kind of novel belt crosses the charging circuit of charging protection function |
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| Publication Number | Publication Date |
|---|---|
| CN208797621U true CN208797621U (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821471896.1U Active CN208797621U (en) | 2018-09-07 | 2018-09-07 | A kind of novel belt crosses the charging circuit of charging protection function |
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| CN (1) | CN208797621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751383A (en) * | 2020-12-29 | 2021-05-04 | 广东金莱特电器股份有限公司 | Charging circuit and electric fan |
-
2018
- 2018-09-07 CN CN201821471896.1U patent/CN208797621U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751383A (en) * | 2020-12-29 | 2021-05-04 | 广东金莱特电器股份有限公司 | Charging circuit and electric fan |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221226 Address after: 529000 Room 203, Floor 2, Building 1, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee after: Jiangmen Xiaosong Intelligent Technology Co.,Ltd. Address before: 529085 301, Floor 3, Building 2, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee before: JIANGMEN PENGJIANG DISTRICT JINYING TECHNOLOGY Co.,Ltd. |