CN202455116U - Novel discharge control circuit - Google Patents
Novel discharge control circuit Download PDFInfo
- Publication number
- CN202455116U CN202455116U CN2012200490609U CN201220049060U CN202455116U CN 202455116 U CN202455116 U CN 202455116U CN 2012200490609 U CN2012200490609 U CN 2012200490609U CN 201220049060 U CN201220049060 U CN 201220049060U CN 202455116 U CN202455116 U CN 202455116U
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- resistance
- operational amplifier
- discharge
- oxide
- control circuit
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model provides a novel discharge control circuit. A power resistor is parallelly connected between a source and a drain of a discharge power metal oxide semiconductor (MOS) tube, a discharge MOS control end of a discharge MOS tube switch circuit is connected with a switch control module, and one end of a current detecting resistor of the discharge MOS tube switch circuit is connected with a current detecting module. The novel discharge control circuit has the advantages that turn-on time is prolonged, and current generated in a loop when a battery is powered on is reduced. Adverse effects of current impact on the battery and elements of a system are suppressed, functions of a lithium battery protecting circuit are not affected, the service time of the battery or the elements of the system is effectively prolonged, and requirements on large-scale industrial production are met.
Description
Technical field
The utility model relates to battery and makes field, especially a kind of novel charge/discharge control circuit.
Background technology
At present, when battery and power-supply system access often appear in band protection circuit lithium ion battery when stand-by power supply and UPS applications, self-protection takes place, and can't supply power for system.Though traditional lead-acid battery does not exist the self-protection that powers on can't powerup issue, battery connecting system moment, bigger spark occurs through regular meeting and impact.More than two kinds of situations be mostly because power-supply system input configuration strobes and causes than Da Rong value electric capacity.Battery can be the charging of power-supply system input end capacitor when battery inserted; And there is big electrical potential difference at battery output and electric capacity two ends; Cause the transient state charging current very big, some occasion even kilo-ampere level impulse current can occur, this impulse current generally can not surpass level; But surpassed the delay time of li-ion cell protection line current protection, and can be unfavorable to battery or system's components and parts.
The utility model content
The utility model technical problem to be solved is to provide a kind of novel charge/discharge control circuit.
For solving the problems of the technologies described above, the technical scheme of the utility model is:
A kind of novel charge/discharge control circuit; Comprise discharge metal-oxide-semiconductor switching circuit; Parallel resistance between the source electrode of discharge power metal-oxide-semiconductor and drain electrode; Simultaneously the discharge MOS control end at discharge metal-oxide-semiconductor switching circuit is connected with switch control module, is connected with current detection module at inspection leakage resistance one end of discharge metal-oxide-semiconductor switching circuit.
Preferably; Above-mentioned novel charge/discharge control circuit; Said switch control module is made up of 7 resistance, an electric capacity, a clamp diode and two operational amplifiers; Wherein first resistance (R3) end is connected power supply respectively with second resistance (R9) end; First resistance (R3) other end connects the positive pole of first operational amplifier (U1), the positive pole and the 3rd resistance (R6) of second operational amplifier (U2) respectively; Second resistance (R9) other end is connected with first operational amplifier (U1) backward end with clamp diode (D1) respectively; Clamp diode (D1) other end ground connection, first operational amplifier (U1) minus earth, said first operational amplifier (U1) is connected with the 5th resistance (R12), electric capacity (C1) and the end in the same way of second operational amplifier (U2) respectively through the 4th resistance (R7); The 5th resistance (R12) is connected with second operational amplifier (U2) negative pole respectively with electric capacity (C1) other end and the 6th resistance (R13) end; The 6th resistance (R13) other end is connected with second operational amplifier (U2) backward end, and the 3rd resistance (R6) two ends connect the positive pole and the backward end of second operational amplifier (U2) respectively, and second operational amplifier (U2) is connected with said discharge MOS control end through the 6th resistance (R10); Said current detection module is made up of 5 resistance, two diodes and an operational amplifier; Wherein the 7th resistance (R15) end connects the power supply other end and connects the 3rd operational amplifier (U3) positive pole; The 8th resistance (R18) end connects the power supply other end and connects the 9th resistance (R19) and the 3rd operational amplifier (U 3) backward end respectively; The 9th resistance (R19) other end ground connection; The 3rd operational amplifier (U3) is connected with isolating diode (D4) with the tenth resistance (R17) successively; Isolating diode (D4) is through the 11 resistance (R20) ground connection; Isolating diode (D4) is connected with the end in the same way of first operational amplifier (U1) of switch control module simultaneously, and the end in the same way of the 3rd operational amplifier (U3) is connected with the negative pole of the 3rd operational amplifier (U3) through rectifier diode (D5), and the end in the same way of the 3rd operational amplifier (U3) connects the inspection leakage resistance of above-mentioned discharge metal-oxide-semiconductor switching circuit.
Preferably, above-mentioned novel charge/discharge control circuit, said power supply are the 5V power supply.
Preferably, above-mentioned novel charge/discharge control circuit, parallel resistor is a power-type resistance between the source electrode of said discharge power metal-oxide-semiconductor and drain electrode.
The utility model structure has following beneficial effect:
Above-mentioned novel charge/discharge control circuit; Has the advantage that prolongs turn-on time, produces electric current when reducing battery and powering in the loop; Thereby suppress the adverse effect that rush of current causes battery and system element; Simultaneously do not influence lithium electric protection circuit self function again, effectively prolonged the service time of battery or system's components and parts, be fit to requirements of large-scale industrial production.
Description of drawings
Fig. 1 is the circuit connection diagram of the said novel charge/discharge control circuit of the utility model;
Fig. 2 is the circuit connection diagram of switch control module in the said novel charge/discharge control circuit of the utility model;
Fig. 3 is the circuit connection diagram of current detection module in the said novel charge/discharge control circuit of the utility model.
Embodiment
For further specifying the utility model, existing conjunction with figs. is set forth in detail:
Like Fig. 1, Fig. 2 and shown in Figure 3; Said novel charge/discharge control circuit; Comprise discharge metal-oxide-semiconductor switching circuit; Parallelly connected power-type resistance R 21 between the source electrode of discharge power metal-oxide-semiconductor and drain electrode; Simultaneously the discharge MOS control end at discharge metal-oxide-semiconductor switching circuit is connected with switch control module, is connected with current detection module at inspection leakage resistance R16 one end of discharge metal-oxide-semiconductor switching circuit, and said switch control module is made up of 7 resistance, an electric capacity, a clamp diode and two operational amplifiers; Wherein first resistance R, 3 one ends are connected the 5V power supply respectively with second resistance R, 9 one ends; First resistance R, 3 other ends connect the positive pole of the first operational amplifier U1 respectively, anodal and the 3rd resistance R 6, the second resistance R 9 other ends of the second operational amplifier U2 are connected clamp diode D1 other end ground connection with clamp diode D1 respectively with the first operational amplifier U1 backward end; The first operational amplifier U1 minus earth; The said first operational amplifier U1 is connected with the end in the same way of the second operational amplifier U2 with the 5th resistance R 12, capacitor C 1 respectively through the 4th resistance R 7, and the 5th resistance R 12 is connected with the second operational amplifier U2 negative pole respectively with capacitor C 1 other end and the 6th resistance R 13 1 ends, and the 6th resistance R 13 other ends are connected with the second operational amplifier U2 backward end; The 3rd resistance R 6 two ends connect positive pole and the backward end of the second operational amplifier U2 respectively, and the second operational amplifier U2 is connected with said discharge MOS control end through the 6th resistance R 10; Said current detection module is made up of 5 resistance, two diodes and an operational amplifier; Wherein the 7th resistance R 15 1 ends connect the 5V power supply other end and connect the 3rd operational amplifier U3 positive pole; The 8th resistance R 18 1 ends connect the 5V power supply other end and connect the 9th resistance R 19 and the 3rd operational amplifier U3 backward end respectively; The 9th resistance R 19 other end ground connection; The 3rd operational amplifier U3 is connected with isolating diode D4 with the tenth resistance R 17 successively, and isolating diode D4 is through the 11 resistance R 20 ground connection, and isolating diode D4 is connected with the end in the same way of the first operational amplifier U1 of switch control module simultaneously; The end in the same way of the 3rd operational amplifier U3 is connected with the negative pole of the 3rd operational amplifier U3 through rectifier diode D5, and the end in the same way of the 3rd operational amplifier U3 connects the inspection leakage resistance R16 of above-mentioned discharge metal-oxide-semiconductor switching circuit.
On concrete the application; Above-mentioned novel charge/discharge control circuit is through adding the power-type resistance R 21 that can bear big transient power of a suitable resistance; Through predefined delay time; This power-type resistance R 21 of short circuit makes battery and system accomplish normal the access again, and promptly battery discharge experiences one section current-limit mode in earlier stage.
Charge/discharge control circuit turn-offs the discharge power metal-oxide-semiconductor, when battery begins to discharge in advance in the li-ion cell protection circuit when battery does not discharge; Electric current flows through the power-type resistance R 21 of parallel connection, and loop current determines by load impedance and R21 resistance jointly, when load impedance during much smaller than R21; Loop current is mainly by the R21 decision, and when powering on like battery, battery is system power supply input end capacitor charging situation; Charging current is determined that by R21 the battery discharge form is exceeded and banished electricity, and this cut-off current is set and is less than the current protection value that battery is provided with; Thereby when avoiding battery to power on electric capacity charging generation super-high-current is caused the action of battery protection circuit, the self-protection phenomenon takes place.Meanwhile discharge examination and delay control circuit detect battery discharge status through the VIN end; And get into the time-delay stage; The RC loop decision that delay time is made up of the 4th resistance R 7 and capacitor C 1; Delay time length can realize that capacitor C 1 can be a plurality of electric capacity parallel connections through adjustment the 4th resistance R 7 and capacitor C 1 value.And battery was to the power-supply system input end capacitor charging interval when this delay time setting should power on greater than battery, thereby battery is the big spark that the electric capacity charging produces when also avoiding battery to power on.Through behind the delay time, the upset of the second operational amplifier U2 level is opened the discharge metal-oxide-semiconductor through the FDC end, and discharge switching circuit is as shown in Figure 1, and the power-type resistance R 21 that is connected in parallel on discharge metal-oxide-semiconductor two ends this moment is by short circuit, and the discharge loop electric current is mainly determined by load.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (4)
1. novel charge/discharge control circuit; Comprise discharge metal-oxide-semiconductor switching circuit; It is characterized in that: parallel resistance between the source electrode of discharge power metal-oxide-semiconductor and drain electrode; Simultaneously the discharge MOS control end at discharge metal-oxide-semiconductor switching circuit is connected with switch control module, is connected with current detection module at inspection leakage resistance one end of discharge metal-oxide-semiconductor switching circuit.
2. novel charge/discharge control circuit according to claim 1; It is characterized in that: said switch control module is made up of 7 resistance, an electric capacity, a clamp diode and two operational amplifiers; Wherein first resistance (R3) end is connected power supply respectively with second resistance (R9) end; First resistance (R3) other end connects the positive pole of first operational amplifier (U1), the positive pole and the 3rd resistance (R6) of second operational amplifier (U2) respectively; Second resistance (R9) other end is connected with first operational amplifier (U1) backward end with clamp diode (D1) respectively; Clamp diode (D1) other end ground connection; First operational amplifier (U1) minus earth; Said first operational amplifier (U1) is connected with the 5th resistance (R12), electric capacity (C1) and the end in the same way of second operational amplifier (U2) respectively through the 4th resistance (R7), and the 5th resistance (R12) is connected with second operational amplifier (U2) negative pole respectively with electric capacity (C1) other end and the 6th resistance (R13) end, and the 6th resistance (R13) other end is connected with second operational amplifier (U2) backward end; The 3rd resistance (R6) two ends connect the positive pole and the backward end of second operational amplifier (U2) respectively, and second operational amplifier (U2) is connected with said discharge MOS control end through the 6th resistance (R10); Said current detection module is made up of 5 resistance, two diodes and an operational amplifier; Wherein the 7th resistance (R15) end connects the power supply other end and connects the 3rd operational amplifier (U3) positive pole; The 8th resistance (R18) end connects the power supply other end and connects the 9th resistance (R19) and the 3rd operational amplifier (U3) backward end respectively; The 9th resistance (R19) other end ground connection; The 3rd operational amplifier (U3) is connected with isolating diode (D4) with the tenth resistance (R17) successively; Isolating diode (D4) is through the 11 resistance (R20) ground connection; Isolating diode (D4) is connected with the end in the same way of first operational amplifier (U1) of switch control module simultaneously, and the end in the same way of the 3rd operational amplifier (U3) is connected with the negative pole of the 3rd operational amplifier (U3) through rectifier diode (D5), and the end in the same way of the 3rd operational amplifier (U3) connects the inspection leakage resistance of above-mentioned discharge metal-oxide-semiconductor switching circuit.
3. novel charge/discharge control circuit according to claim 2 is characterized in that: said power supply is the 5V power supply.
4. novel charge/discharge control circuit according to claim 1 is characterized in that: parallel resistor is a power-type resistance between the source electrode of said discharge power metal-oxide-semiconductor and drain electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200490609U CN202455116U (en) | 2012-02-15 | 2012-02-15 | Novel discharge control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200490609U CN202455116U (en) | 2012-02-15 | 2012-02-15 | Novel discharge control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202455116U true CN202455116U (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200490609U Expired - Fee Related CN202455116U (en) | 2012-02-15 | 2012-02-15 | Novel discharge control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202455116U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525667A (en) * | 2020-06-01 | 2020-08-11 | 长沙市健科电子有限公司 | Charging control circuit |
-
2012
- 2012-02-15 CN CN2012200490609U patent/CN202455116U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525667A (en) * | 2020-06-01 | 2020-08-11 | 长沙市健科电子有限公司 | Charging control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190417 Address after: 252000 No.5 Office Building of Caijin Building, 111 Changjiang Road, Liaocheng High-tech Zone, Shandong Province Patentee after: Shandong Massive New Materials Technology Co., Ltd. Address before: 311106 No. 102-5, 101 Shunda Road, Qianjiang Economic Development Zone, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Wanho Wanjia Power Battery Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20210215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |