CN201690279U - Super capacitor protection circuit - Google Patents
Super capacitor protection circuit Download PDFInfo
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- CN201690279U CN201690279U CN2010201938914U CN201020193891U CN201690279U CN 201690279 U CN201690279 U CN 201690279U CN 2010201938914 U CN2010201938914 U CN 2010201938914U CN 201020193891 U CN201020193891 U CN 201020193891U CN 201690279 U CN201690279 U CN 201690279U
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- super capacitor
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Abstract
The utility model relates to a super capacitor protection circuit, which comprises a comparison operations circuit U1, a reference voltage circuit U2, an oscillation circuit U3, a switch pipe Q1, an inductor L3 and a diode D1, wherein a negative electrode of a super capacitor is connected with an input end of the comparison operations circuit U1, an output end of the reference voltage circuit U2 is connected with the input end of the U1, the output end of the U1 is connected the U3, the U3 is connected with a control pin of the switch pipe Q1, a third pin thereof is connected with a negative public line, a second pin of the Q1 is connected with one end of the inductor L3 and the diode D1, the other end of the L3 is connected with a positive electrode of the super capacitor which is protected. The super capacitor protection circuit can automatically monitor and protect the super capacitor during the charging process of a super capacitor group, when exceeding a given protection voltage, the super capacitor protection circuit automatically transports exceeded voltage to a primary super capacitor, and so on to N super capacitor. The super capacitor protection circuit has simple structure and reliable operation, and can effectively protect the super capacitor group, and prolongs the service life thereof.
Description
Technical field
The utility model relates to electric capacity protective device or electric capacity protective circuit, especially a kind of super capacitor protective circuit that protection is provided to ultracapacitor when being used to discharge and recharge.
Background technology
The rated voltage of ultracapacitor is very low, generally less than 3V, needs to be connected in series in a large number in application.Owing to often need big electric current charge and discharge in using, therefore on each monolithic capacitor in the series connection voltage whether consistent be vital.Influencing the major parameter whether ultracapacitor voltage divide equally has: capacitance, ESR, leakage current etc., although the influence that ultracapacitor is divided equally the voltage of ultracapacitor in these parameters of application initial stage is smaller, but in the middle and later periods of supercapacitor applications, along with the discreteness change of these parameters is big, increasing to the influence that ultracapacitor voltage is divided equally, finally cause the ultracapacitor life-span sharply to shorten.If do not take necessary all pressures measure, can cause that voltage is bigger on each monolithic capacitor, therefore, it is worthless taking more serial number to solve problem.
Fig. 3 is traditional super capacitor protective circuit, the characteristics of traditional circuit as we can see from the figure: when voltage was lower than breakover voltage, circuit was in " blocking-up " state, and very little leakage current is only arranged; And after voltage meets and exceeds breakover voltage, the electric current that flows through circuit will sharply increase with the increase of voltage, present the voltage stabilizing didoe characteristic, with the electric charge that reaches the shunting charging current or release and overcharge, the voltage of final ultracapacitor is limited in below the breakover voltage.
The advantage of sort circuit is that the circuit working principle is simple, reliable operation, and parameter consistency is good, and general maximum operating currenbt is below 1A.This specific character has also been brought the problem of using, and just more serious overvoltage can appear in some the ultracapacitor monomer in the bank of super capacitors in the charging process.
The utility model content
At the deficiency of above existing super capacitor protective circuit, the purpose of this utility model provides the super capacitor protective circuit of a kind of simple in structure, reliable operation, high conformity.
The purpose of this utility model is achieved by the following technical solution:
The super capacitor protective circuit comprises super capacitor and connected protective circuit, and described protective circuit comprises comparison operation circuit U 1, reference voltage circuit U2, oscillating circuit U3, switching tube Q1, inductor L3 and diode D1;
The negative pole of described super capacitor connects the homophase or the inverting input of comparison operation circuit U 1, and the output of reference voltage circuit U2 connects the anti-phase or in-phase input end of comparison operation circuit U 1;
The positive input terminal of described comparison operation circuit U 1 connects the positive common wire VCC of DC power supply, and the negative input end of comparison operation circuit U 1 connects the negative common wire GND of DC power supply;
The positive input terminal of described reference voltage circuit U2 connects the positive common wire VCC of DC power supply, and the negative input end of reference voltage circuit U2 connects the negative common wire GND of DC power supply;
The output of described comparison operation circuit U 1 connects oscillating circuit U3, and the oscillating impulse output of oscillating circuit U3 connects the control pin of switching tube Q1; The tripod of switching tube Q1 connects negative common wire GND, and the crus secunda of switching tube Q1 connects the end of inductor L3 and the negative pole of diode D1, and the other end of described inductor L3 connects the positive pole of protected super capacitor.
As optimal technical scheme of the present utility model, described protective circuit also comprises the voltage clipping element, and the voltage clipping element is connected the two ends of described super capacitor.
As optimal technical scheme of the present utility model, described super capacitor and protective circuit thereof are provided with more than two, and two above super capacitors and protective circuit thereof are connected in series mutually and constitute the super capacitor group.
The beneficial effects of the utility model are: with respect to prior art, the utility model in super capacitor or the big electric current fast charging and discharging of super capacitor group process, the electric current and the voltage that can efficient balance discharge and recharge.In the super capacitor group charging process of giving series connection; the super capacitor individuality can be monitored and protect to the protective circuit module automatically; when exceeding the protection voltage of setting, the voltage that the circuit of module will exceed is automatically transferred in the super capacitor of upper level, and the rest may be inferred up to N super capacitor.The utility model is simple in structure, reliable operation, high conformity, can effectively protect super capacitor or super capacitor group, prolongs its useful life.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the application schematic diagram of the utility model bank of super capacitors;
Fig. 3 is the principle schematic of traditional super capacitor protective circuit.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment:
As shown in Figure 1, the super capacitor protective circuit comprises super capacitor and connected protective circuit, and described protective circuit comprises comparison operation circuit U 1, reference voltage circuit U2, oscillating circuit U3, switching tube Q1, inductor L3 and diode D1; The negative pole of described super capacitor connects the homophase or the inverting input of comparison operation circuit U 1, and the output of reference voltage circuit U2 connects the anti-phase or in-phase input end of comparison operation circuit U 1; The positive input terminal of described comparison operation circuit U 1 connects the positive common wire VCC of DC power supply, and the negative input end of comparison operation circuit U 1 connects the negative common wire GND of DC power supply; The positive input terminal of described reference voltage circuit U2 connects the positive common wire VCC of DC power supply, and the negative input end of reference voltage circuit U2 connects the negative common wire GND of DC power supply; The output of described comparison operation circuit U 1 connects oscillating circuit U3, and the oscillating impulse output of oscillating circuit U3 connects the control pin of switching tube Q1; The tripod of switching tube Q1 connects negative common wire GND, and the crus secunda of switching tube Q1 connects the end of inductor L3 and the negative pole of diode D1, and the other end of described inductor L3 connects the positive pole of protected super capacitor.
In the present embodiment, described protective circuit also comprises voltage clipping elements such as resistance, and the voltage clipping element is connected the two ends of super capacitor.Present embodiment super capacitor protection module can be used to protect the monomer super capacitor, also is applicable to the super capacitor group that two above super capacitors are formed.
As shown in Figure 2, two above super capacitors and protective circuit thereof are connected in series mutually and constitute the super capacitor group.In the super capacitor group charging process of giving series connection; the super capacitor monomer can be monitored and protect to the protective circuit module automatically; when exceeding the protection voltage of setting, the voltage that the circuit of module will exceed is automatically transferred in the super capacitor of upper level, and the rest may be inferred up to N super capacitor.
Claims (3)
1. super capacitor protective circuit, comprise super capacitor and connected protective circuit, it is characterized in that: described protective circuit comprises comparison operation circuit (U1), reference voltage circuit (U2), oscillating circuit (U3), switching tube (Q1), inductor (L3) and diode (D1);
The negative pole of described super capacitor connects the homophase or the inverting input of comparison operation circuit (U1), and the output of reference voltage circuit (U2) connects the anti-phase or in-phase input end of comparison operation circuit (U1);
Just (+) input of described comparison operation circuit (U1) connects the positive common wire (VCC) of DC power supply, and negative (-) input of comparison operation circuit (U1) connects the negative common wire (GND) of DC power supply;
Just (+) input of described reference voltage circuit (U2) connects the positive common wire (VCC) of DC power supply, and negative (-) input of reference voltage circuit (U2) connects the negative common wire (GND) of DC power supply;
The output of described comparison operation circuit (U1) connects oscillating circuit (U3), and the oscillating impulse output of oscillating circuit (U3) connects the control pin of switching tube (Q1); The tripod of switching tube (Q1) connects negative common wire (GND), and the crus secunda of switching tube (Q1) connects an end of inductor (L3) and the negative pole of diode (D1), and the other end of described inductor (L3) connects the positive pole of protected super capacitor.
2. super capacitor protective circuit according to claim 1 is characterized in that: described protective circuit also comprises the voltage clipping element, and the voltage clipping element is connected the two ends of described super capacitor.
3. super capacitor protective circuit according to claim 1 and 2 is characterized in that: described super capacitor and protective circuit thereof are provided with more than two, and two above super capacitors and protective circuit thereof are connected in series mutually and constitute the super capacitor group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201938914U CN201690279U (en) | 2010-05-11 | 2010-05-11 | Super capacitor protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201938914U CN201690279U (en) | 2010-05-11 | 2010-05-11 | Super capacitor protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690279U true CN201690279U (en) | 2010-12-29 |
Family
ID=43378556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201938914U Expired - Fee Related CN201690279U (en) | 2010-05-11 | 2010-05-11 | Super capacitor protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595101A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Super-capacitor energy storing device |
-
2010
- 2010-05-11 CN CN2010201938914U patent/CN201690279U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595101A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Super-capacitor energy storing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20130511 |