CN202111512U - Back-up power system capable of detecting charging and discharging current - Google Patents
Back-up power system capable of detecting charging and discharging current Download PDFInfo
- Publication number
- CN202111512U CN202111512U CN2011201590084U CN201120159008U CN202111512U CN 202111512 U CN202111512 U CN 202111512U CN 2011201590084 U CN2011201590084 U CN 2011201590084U CN 201120159008 U CN201120159008 U CN 201120159008U CN 202111512 U CN202111512 U CN 202111512U
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- lithium battery
- control circuit
- battery group
- current
- charging
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model discloses a back-up power system capable of detecting charging and discharging current. The system comprises a direct current power source, a lithium battery pack, a discharge control circuit, a charge control circuit, a current detection circuit and a central processing unit, wherein the direct current power source is used for converting mains supply into direct current; the lithium battery pack is connected to an electric load of the direct current power source; the discharge control circuit and the charge control circuit are connected in series and are positioned between a connection point of the direct current power source and the electrical load and the lithium battery pack; the discharge control circuit is used for transmitting electric energy of the lithium battery pack to the electrical load; the charge control circuit is used for transmitting electric energy from the direct current power source to the lithium battery pack; one end of the current detection circuit is connected with a negative electrode of the lithium battery pack, and the other end of the current detection circuit is connected with the central processing unit; and the central processing unit is used for controlling on and off of the discharge control circuit and on and off of the charge control circuit according to discharging current or charging current of the current detection circuit. Through the back-up power system, charging current and discharging current can be monitored, and the lithium battery pack and the direct current power source are prevented from being damaged due to over-high current during charging or discharging, so that the lithium battery pack is effectively protected.
Description
Technical field
The utility model relates to electronics and power technique fields, is specifically related to a kind of backup power system that detects the impulse electricity electric current.
Background technology
In the high ferro power consumption equipment, especially the power management of ticket checking gate becomes the difficult point of art technology, because unexpected power failure or power failure can make the action of ticket checking imperfect, and causes the loss of passenger and railway; Secondly, often there is multiple anomaly in electrical network, for example: grid power blackout, electrical network quits work, no-voltage output; Pressure drop, line voltage are lower than nominal voltage 15%-20%, and the time possibly continue the several seconds; Surge, surging are also claimed in surge, and line voltage moment is higher than nominal voltage more than 10%, the time remaining several seconds; Continue under-voltage sustained overvoltage line and make an uproar, because of poor radio frequency or the electromagnetic interference of introducing of circuit shielding; Frequency drift, the mains frequency deviation that the generator instability causes; Switching transient is also claimed transient state, and the voltage deviation that is caused by electric equipment switch or discharge sometimes can be up to 20000 volts, but the duration is extremely short, only counts nanoseconds; Harmonic wave, in the electrical network by the electric equipment of nonlinear characteristic produce to the sine-shaped interference of alternating current.Thereby need can, this situation guarantee the completion of ticket checking transaction when taking place and stop new transaction by a kind of power supply through the communication apprizing system.This just requires, and the complete machine power supply possesses back-up capability.
Generally speaking, if having a power failure and during the less generation of fault battery be in the state of shelving that is full of, the temperature of battery life and environment etc. are relevant.If the power failure fault frequently takes place, battery life is relevant with usage frequency again.So the life-span of estimating battery is difficult to, and simply uses time (such as 3 years) standard to be used as overhauling and changing the foundation or the non insurance of battery pack, or can cause certain waste.In addition, this kind equipment relatively disperses in the high ferro, and frequent manual work is patrolled, and very difficulty is also uneconomical.
Summary of the invention
The utility model provides a kind of backup power system that detects the impulse electricity electric current, and this back-up source system can monitor charging current and discharging current, and electric current excessive damage lithium battery group and DC power supply when perhaps discharging prevent to charge; Thereby effectively protected the lithium battery group.
For achieving the above object; The technical scheme that the utility model adopts is: a kind of backup power system that detects the impulse electricity electric current; Comprise: be used for civil power is converted into the DC power supply of direct current,, be connected to the electric loading of using of said DC power supply by the lithium battery group that some lithium batteries are formed; The charge/discharge control circuit of series connection and charging control circuit are between said DC power supply and contact and lithium battery group with electric loading; This charge/discharge control circuit be used for the electric energy transmitting of lithium battery group give use electric loading, this charging control circuit be used for from the electric energy transmitting of DC power supply to the lithium battery group;
The inspection leakage resistance at said lithium battery group negative pole and connect at the end;
Current detection circuit one end is connected to lithium battery group negative pole; Its other end is connected to CPU; The inspection leakage resistance that is used to detect charging and discharging currents is connected between said lithium battery group negative pole and the ground connection; This current detection circuit is under the charge or discharge state in said lithium battery group, obtains charging current or discharging current and is transferred to CPU according to said inspection leakage resistance voltage;
The break-make that one CPU is controlled said charge/discharge control circuit according to the discharging current or the charging current of said current detection circuit and the break-make of charging control circuit.
Related content in the technique scheme is explained as follows:
1, in the such scheme, the first amplifier in-phase input end is connected to the negative pole of lithium battery group and the contact of inspection leakage resistance in the said current detection circuit, its reverse inter-input-ing ending grounding, and its output is connected to said CPU; The second amplifier inverting input is connected to the negative pole of lithium battery group and the contact of inspection leakage resistance, its in-phase input end ground connection, and its output is connected to CPU.
2, in the such scheme; The collector electrode of the 1st triode is connected to the base stage of the 2nd FET in the said charge/discharge control circuit; The grounded emitter of the 1st triode; The base stage of the 1st triode is accepted the discharge break-make control signal from CPU, and the source electrode of the 2nd FET connects the positive pole of lithium battery group, and the drain electrode of the 2nd FET is connected to DC power supply and with the contact of electric loading; Said discharge break-make control signal makes the 1st triode conducting, thereby makes the 2nd FET conducting, and the lithium battery group is passed through the 2nd FET to the electricity consumption electric.
3, in the such scheme; The grounded emitter of the 3rd triode in the said charging control circuit, the collector electrode of the 3rd triode is connected to the base stage of the 4th FET, and the 4th FET source electrode is connected to DC power supply and with the contact of electric loading; Charging break-make control signal from said CPU is imported from the 3rd transistor base; This charging break-make control signal is controlled the 3rd triode break-make, thereby makes the 4th FET conducting, and DC power supply charges to the lithium battery group.
Because the technique scheme utilization, the utility model compared with prior art has advantage and effect:
The utility model can be monitored charging current and discharging current by backup power system, and electric current excessive damage lithium battery group and DC power supply when perhaps discharging prevent to charge; Thereby effectively protected the lithium battery group; Secondly, the utility model can in time respond by backup power system, thereby has effectively protected the lithium battery group, makes the user can use battery fully and before significant trouble takes place, in time changes battery, and promptly economy is avoided again losing.
Description of drawings
Accompanying drawing 1 is the utility model circuit theory diagrams;
Accompanying drawing 2 is the utility model circuit diagram.
In the above accompanying drawing: 1, DC power supply; 2, lithium battery group; 3, use electric loading; 4, charge/discharge control circuit; 5, charging control circuit; 6, CPU; 7, current detection circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment: a kind of backup power system that detects the impulse electricity electric current shown in accompanying drawing 1-2, comprising: be used for civil power is converted into the DC power supply 1 of direct current, by the lithium battery group 2 that some lithium batteries are formed, be connected to the usefulness electric loading 3 of said DC power supply 1; The charge/discharge control circuit 4 of series connection and charging control circuit 5 are between said DC power supply 1 and contact and lithium battery group 2 with electric loading 3; This charge/discharge control circuit 4 is used for the electric energy transmitting of lithium battery group 2 is given with electric loading 3, this charging control circuit 5 be used for from the electric energy transmitting of DC power supply 1 to lithium battery group 2;
Inspection leakage resistance R1 is at said lithium battery group 2 negative poles and connect at the end.
Current detection circuit 7 one ends are connected to lithium battery group 2 negative poles; Its other end is connected to CPU 6; The inspection leakage resistance R1 that is used to detect charging and discharging currents is connected between said lithium battery group 2 negative poles and the ground connection; This current detection circuit 7 is under the charge or discharge state in said lithium battery group 2, obtains charging current or discharging current and is transferred to CPU 6 according to said inspection leakage resistance R1 voltage;
The break-make that one CPU 6 is controlled said charge/discharge control circuit 4 according to the discharging current or the charging current of said current detection circuit 7 and the break-make of charging control circuit 5.
The first amplifier U1B in-phase input end is connected to the negative pole of lithium battery group 2 and the contact of inspection leakage resistance R1 in the above-mentioned current detection circuit 7, and its reverse inter-input-ing ending grounding, its output are connected to said CPU 6; The second amplifier U1A inverting input is connected to the negative pole of lithium battery group 2 and the contact of inspection leakage resistance R1, its in-phase input end ground connection, and its output is connected to CPU 6.Be specially: current detection circuit 9 is made up of R1 ~ R9, U1A, U1B and C1.R1 is a voltage with the battery set charge/discharge current conversion; C1 electric capacity is local filtering, ensures the working stability of U1A; R2 ~ R5 and U1A constitute the anti-phase proportional amplifier, output discharging current signal ID; R6 ~ R9 and U1B constitute the in-phase proportion amplifier, output charging current signal IC; ID and IC signal input single-chip microcomputer are handled; No matter the amplifier of two parallel connections discharges is still charged; All use same inspection leakage resistance R1, in the opposite direction when discharging and recharging, so the signal on inspection leakage resistance R1 have just have negative; Use the parallel connection of homophase and inverting amplifier, guaranteed that signal is all for handling just can for CPU 8.
The collector electrode of the 1st triode Q1 is connected to the base stage of the 2nd FET Q2 in the above-mentioned charge/discharge control circuit 4; The grounded emitter of the 1st triode Q1; The base stage of the 1st triode Q1 is accepted the discharge break-make control signal PS from CPU 6; The source electrode of the 2nd FET Q2 connects the positive pole of lithium battery group 2, and the drain electrode of the 2nd FET Q2 is connected to DC power supply 1 and with the contact of electric loading 3; Said discharge break-make control signal PS makes the 1st triode Q1 conducting, thereby makes the 2nd FET Q2 conducting, and lithium battery group 2 is passed through the 2nd FET Q2 to supplying power with electric loading 3.
The grounded emitter of the 3rd triode Q3 in the above-mentioned charging control circuit 5; The collector electrode of the 3rd triode Q3 is connected to the base stage of the 4th FET Q4; The 4th FET Q4 source electrode is connected to DC power supply 1 and with the contact of electric loading 3, imports from the 3rd triode Q3 base stage from the charging break-make control signal CHG of said CPU 6, and this charging break-make control signal CHG controls the 3rd triode Q3 break-make; Thereby make the 4th FET Q4 conducting, DC power supply 1 is to 2 chargings of lithium battery group.
The foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection range of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the utility model.
Claims (4)
1. backup power system that can detect the impulse electricity electric current; Comprise: the DC power supply (1) that is used for civil power is converted into direct current; The lithium battery group of forming by some lithium batteries (2); Be connected to the usefulness electric loading (3) of said DC power supply (1); It is characterized in that: also comprise: charge/discharge control circuit of series connection (4) and charging control circuit (5) are positioned between said DC power supply (1) and the contact and lithium battery group (2) with electric loading (3); This charge/discharge control circuit (4) is used for the electric energy transmitting of lithium battery group (2) is given with electric loading (3), this charging control circuit (5) be used for from the electric energy transmitting of DC power supply (1) to lithium battery group (2);
Inspection leakage resistance (R1) is positioned at said lithium battery group (2) negative pole and connects at the end;
Current detection circuit (7) one ends are connected to the contact of lithium battery group (2) negative pole and ground connection; Its other end is connected to CPU (6); This current detection circuit (7) is under the charge or discharge state in said lithium battery group (2), obtains charging current or discharging current and is transferred to CPU (6) according to said inspection leakage resistance (R1) voltage;
The break-make that one CPU (6) is controlled said charge/discharge control circuit (4) according to the discharging current or the charging current of said current detection circuit (7) and the break-make of charging control circuit (5).
2. backup power system according to claim 1; It is characterized in that: first amplifier (U1B) in-phase input end is connected to the negative pole of lithium battery group (2) and the contact of inspection leakage resistance (R1) in the said current detection circuit (7); Its reverse inter-input-ing ending grounding, its output are connected to said CPU (6); Second amplifier (U1A) inverting input is connected to the negative pole of lithium battery group (2) and the contact of inspection leakage resistance (R1), its in-phase input end ground connection, and its output is connected to CPU (6).
3. backup power system according to claim 1 and 2; It is characterized in that: the collector electrode of the 1st triode (Q1) is connected to the base stage of the 2nd FET (Q2) in the said charge/discharge control circuit (4); The grounded emitter of the 1st triode (Q1); The base stage of the 1st triode (Q1) is accepted the discharge break-make control signal (PS) from CPU (6); The source electrode of the 2nd FET (Q2) connects the positive pole of lithium battery group (2), and the drain electrode of the 2nd FET (Q2) is connected to DC power supply (1) and with the contact of electric loading (3); Said discharge break-make control signal (PS) makes the 1st triode (Q1) conducting, thereby makes the 2nd FET (Q2) conducting, and lithium battery group (2) is passed through the 2nd FET (Q2) to supplying power with electric loading (3).
4. backup power system according to claim 1 and 2; It is characterized in that: the grounded emitter of the 3rd triode (Q3) in the said charging control circuit (5); The collector electrode of the 3rd triode (Q3) is connected to the base stage of the 4th FET (Q4); The 4th FET (Q4) source electrode is connected to DC power supply (1) and with the contact of electric loading (3); Charging break-make control signal (CHG) from said CPU (6) is imported from the 3rd triode (Q3) base stage; This charging break-make control signal (CHG) control the 3rd triode (Q3) break-make, thus make the 4th FET (Q4) conducting, and DC power supply (1) charges to lithium battery group (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201590084U CN202111512U (en) | 2011-05-18 | 2011-05-18 | Back-up power system capable of detecting charging and discharging current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201590084U CN202111512U (en) | 2011-05-18 | 2011-05-18 | Back-up power system capable of detecting charging and discharging current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202111512U true CN202111512U (en) | 2012-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201590084U Expired - Fee Related CN202111512U (en) | 2011-05-18 | 2011-05-18 | Back-up power system capable of detecting charging and discharging current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202111512U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681715A (en) * | 2017-09-21 | 2018-02-09 | 成都亿佰达电子科技有限公司 | It is a kind of to realize the device for extending power supply continuation of the journey duration |
| CN111555386A (en) * | 2020-04-30 | 2020-08-18 | 科华恒盛股份有限公司 | Power supply product and power supply's battery charging protection circuit |
-
2011
- 2011-05-18 CN CN2011201590084U patent/CN202111512U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681715A (en) * | 2017-09-21 | 2018-02-09 | 成都亿佰达电子科技有限公司 | It is a kind of to realize the device for extending power supply continuation of the journey duration |
| CN111555386A (en) * | 2020-04-30 | 2020-08-18 | 科华恒盛股份有限公司 | Power supply product and power supply's battery charging protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YICHENG (SUZHOU) ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: YICHENG (SUZHOU) NEW TECHNOLOGY CO., LTD. Effective date: 20120905 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 215163 SUZHOU, JIANGSU PROVINCE TO: 215000 SUZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120905 Address after: 215000 No. 350 Qingcheng Mountain Road, hi tech Industrial Development Zone, Jiangsu, Suzhou Patentee after: Easyway (Suzhou) Electronic Technology Co., Ltd. Address before: 215163, building 189, No. 1, Kunlun mountain road, hi tech Zone, Jiangsu, Suzhou Patentee before: Yicheng (Suzhou) New Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20150518 |
|
| EXPY | Termination of patent right or utility model |