CN204118791U - The control protection electric circuit of portable power source - Google Patents
The control protection electric circuit of portable power source Download PDFInfo
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- CN204118791U CN204118791U CN201420495870.6U CN201420495870U CN204118791U CN 204118791 U CN204118791 U CN 204118791U CN 201420495870 U CN201420495870 U CN 201420495870U CN 204118791 U CN204118791 U CN 204118791U
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- electrically connected
- triode
- power source
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- 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 kind of control protection electric circuit of portable power source, comprise lithium battery, the charging-discharging controller be electrically connected with described lithium battery both positive and negative polarity and in order to provide operating voltage to the external power source of described charging-discharging controller, between described external power source and described charging-discharging controller, be also electrically connected with overvoltage crowbar and instead fill protective circuit, also be provided with current limit detector, overtemperature protector and pressurizer, described current limit detector, overtemperature protector and pressurizer are electrically connected on described charging-discharging controller respectively; Thus the control and protection well achieved charging and discharging lithium battery operation, improve the security performance of portable power source, extend the useful life of portable power source.
Description
Technical field
The utility model relates to portable power source technical field, specifically provides a kind of control protection electric circuit of portable power source.
Background technology
At present, the portable power source on market does not mostly configure the protective circuit such as rational control circuit and overvoltage, overcurrent, excess temperature, and this just makes portable power source in charging process, easily occur security incident, the defect such as cause portable power source useful life short.
Summary of the invention
In order to overcome above-mentioned defect, the utility model provides a kind of control protection electric circuit of portable power source, and this control protection electric circuit advantages of simple, has multinomial defencive function, improves the security performance of portable power source, extends the useful life of portable power source.
The utility model in order to the technical scheme solving its technical problem and adopt is: a kind of control protection electric circuit of portable power source; comprise lithium battery, the charging-discharging controller be electrically connected with described lithium battery both positive and negative polarity and in order to provide operating voltage to the external power source of described charging-discharging controller; between described external power source and described charging-discharging controller, be also electrically connected with overvoltage crowbar and instead fill protective circuit; wherein
Described overvoltage crowbar comprises voltage stabilizing didoe, first triode, second triode and the first metal-oxide-semiconductor field effect transistor, the cathodic electricity of described voltage stabilizing didoe is connected to described external power source, ground connection after the anode series resistance of described voltage stabilizing didoe, the base stage of described first triode is electrically connected on the anode of described voltage stabilizing didoe, the collector electrode of described first triode is electrically connected on described external power source, and the collector electrode of described first triode is also electrically connected on the base stage of described second triode simultaneously, the equal ground connection of emitter of described first triode and the second triode, the collector electrode of described second triode is also electrically connected on described external power source, and the collector electrode of described second triode is also electrically connected on the grid of described first metal-oxide-semiconductor field effect transistor simultaneously, separately the source electrode of described first metal-oxide-semiconductor field effect transistor is electrically connected on described external power source,
Described anti-protective circuit of filling comprises the 5th resistance, 3rd triode and the second metal-oxide-semiconductor field effect transistor, one end of described 5th resistance is electrically connected on the drain electrode of described first metal-oxide-semiconductor field effect transistor, the other end of described 5th resistance is electrically connected on the base stage of described 3rd triode, the grounded emitter of described 3rd triode, the collector electrode of described 3rd triode is electrically connected on the grid of described second metal-oxide-semiconductor field effect transistor, and the collector electrode of described 3rd triode is also electrically connected on described charging-discharging controller simultaneously with after the sources connected in parallel of described second metal-oxide-semiconductor field effect transistor, the separately drain electrode of the described second metal-oxide-semiconductor field effect transistor also electric drain electrode being connected to described first metal-oxide-semiconductor field effect transistor.
As further improvement of the utility model, described charging-discharging controller is integrated with Buck-Boost translation circuit.
As further improvement of the utility model, described overvoltage crowbar is electrically connected on described external power source by micro USB interface;
Another described overvoltage crowbar also includes first, second and third and four resistance, the anode of described voltage stabilizing didoe is connected ground connection after the first resistance and the second electric resistance partial pressure successively, and the base stage of described first triode is electrically connected between described first resistance and the second resistance; Be electrically connected on described external power source after collector electrode series connection the 3rd resistance of described first triode, after collector electrode series connection the 4th resistance of described second triode, be electrically connected on described external power source.
As further improvement of the utility model, described anti-protective circuit of filling also includes the 6th, seven and eight resistance, the base stage of described 3rd triode is electrically connected on the other end of described 5th resistance through described 6th resistance, and the other end of described 5th resistance also simultaneously ground connection after the 7th resistance of connecting; Separately the collector electrode of described 3rd triode is also electrically connected on described charging-discharging controller after the 8th resistance of connecting.
As further improvement of the utility model, between described charging-discharging controller and lithium battery, be also electrically connected with overcurrent protector, described overcurrent protector adopts the single battery protection IC of R5478 model.
As further improvement of the utility model, this control protection electric circuit also includes current limit detector, overtemperature protector and pressurizer, and described current limit detector, overtemperature protector and pressurizer are electrically connected on described charging-discharging controller respectively.
The beneficial effects of the utility model are: be not only provided with in this control protection electric circuit and can operate to charging and discharging lithium battery the charging-discharging controller IC controlled; also be provided with to charging and discharging lithium battery operation carry out multiple function protection overvoltage crowbar, instead fill protective circuit, overcurrent protector, current limit detector, overtemperature protector and low pressure difference linear voltage regulator; thus the control and protection well achieved charging and discharging lithium battery operation; improve the security performance of portable power source, extend the useful life of portable power source.
Accompanying drawing explanation
Fig. 1 is operation principle schematic diagram of the present utility model;
Fig. 2 is the circuit theory schematic diagram of overvoltage crowbar described in the utility model;
Fig. 3 is the anti-circuit theory schematic diagram filling protective circuit described in the utility model.
By reference to the accompanying drawings, make the following instructions:
1---lithium battery 2---overvoltage crowbar
3---counter fill protective circuit 4---overcurrent protector
5---current limit detector 6---overtemperature protector
7---pressurizer 8---USB output interface
Embodiment
Referring to figure, preferred embodiment of the present utility model is described in detail.
The utility model discloses a kind of control protection electric circuit of portable power source; comprise lithium battery 1, the charging-discharging controller IC be electrically connected with described lithium battery 1 both positive and negative polarity and in order to provide operating voltage to the external power source of described charging-discharging controller IC; between described external power source and described charging-discharging controller IC, be also electrically connected with overvoltage crowbar 2 and instead fill protective circuit 3; wherein
Described overvoltage crowbar 2 comprises voltage stabilizing didoe D1, first triode Q1, second triode Q2 and the first metal-oxide-semiconductor field effect transistor Q4, the cathodic electricity of described voltage stabilizing didoe D1 is connected to described external power source, ground connection after the anode series resistance of described voltage stabilizing didoe D1, the base stage of described first triode Q1 is electrically connected on the anode of described voltage stabilizing didoe D1, the collector electrode of described first triode Q1 is electrically connected on described external power source, and the collector electrode of described first triode Q1 is also electrically connected on the base stage of described second triode Q2 simultaneously, the equal ground connection of emitter of described first triode Q1 and the second triode Q2, the collector electrode of described second triode Q2 is also electrically connected on described external power source, and the collector electrode of described second triode Q2 is also electrically connected on the grid of described first metal-oxide-semiconductor field effect transistor Q4 simultaneously, separately the source electrode of described first metal-oxide-semiconductor field effect transistor is electrically connected on described external power source,
Described anti-protective circuit 3 of filling comprises the 5th resistance R5, 3rd triode Q3 and the second metal-oxide-semiconductor field effect transistor Q5, one end of described 5th resistance R5 is electrically connected on the drain electrode of described first metal-oxide-semiconductor field effect transistor Q4, the other end of described 5th resistance R5 is electrically connected on the base stage of described 3rd triode Q3, the grounded emitter of described 3rd triode Q3, the collector electrode of described 3rd triode Q3 is electrically connected on the grid of described second metal-oxide-semiconductor field effect transistor Q5, and the collector electrode of described 3rd triode Q3 is also electrically connected on described charging-discharging controller IC simultaneously with after the sources connected in parallel of described second metal-oxide-semiconductor field effect transistor Q5, the separately drain electrode of the described second metal-oxide-semiconductor field effect transistor Q5 also electric drain electrode being connected to described first metal-oxide-semiconductor field effect transistor Q4.
In the present embodiment, described charging-discharging controller IC is integrated with Buck-Boost translation circuit.
In the present embodiment, described overvoltage crowbar 2 is electrically connected on described external power source by micro USB interface;
Another described overvoltage crowbar 2 also includes the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4, the anode of described voltage stabilizing didoe D1 is connected ground connection after the first resistance R1 and the second resistance R2 dividing potential drop successively, and the base stage of described first triode Q1 is electrically connected between described first resistance and the second resistance; Be electrically connected on described external power source after collector electrode series connection the 3rd resistance R3 of described first triode Q1, after collector electrode series connection the 4th resistance R4 of described second triode, be electrically connected on described external power source.
Described anti-protective circuit 3 of filling also includes the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8, the base stage of described 3rd triode Q3 is electrically connected on the other end of described 5th resistance R5 through described 6th resistance R6, and the other end of described 5th resistance R5 also simultaneously ground connection after the 7th resistance R7 that connects; Separately the collector electrode of described 3rd triode Q3 is also electrically connected on described charging-discharging controller IC after the 8th resistance R8 that connects.
In the present embodiment, between described charging-discharging controller IC and lithium battery, be also electrically connected with overcurrent protector 4, described overcurrent protector 4 adopts the single battery protection IC of R5478 model.
In the present embodiment, this control protection electric circuit also includes current limit detector 5, overtemperature protector 6 and low pressure difference linear voltage regulator 7, and described current limit detector, overtemperature protector and pressurizer are electrically connected on described charging-discharging controller IC respectively.
The operation principle of the control protection electric circuit of this portable power source is: during charging, electric current from micro USB interface successively through overvoltage crowbar 2, counter fill protective circuit 3, charging-discharging controller IC Buck circuit to lithium cell charging; During electric discharge, electric current exports through the Boost circuit of described charging-discharging controller IC and circumscribed USB output interface 8 successively from lithium battery.
The operation principle of described overvoltage crowbar 2 is: during charging, when charging voltage is more than 5.6v, voltage-stabiliser tube diode D1 can spill electric current by reverse breakdown, through the first resistance R1 and the second resistance R2 dividing potential drop current limliting conducting first triode Q1, drag down the base current of the second triode Q2 simultaneously, and then turn off the second triode Q2; Now, the grid voltage of P raceway groove first metal-oxide-semiconductor field effect transistor Q4 is turned off by pull-up the 4th resistance R4, makes the first metal-oxide-semiconductor field effect transistor Q4 be cut-off state, thus plays the function of protection to circuit.
Described anti-operation principle of filling protective circuit 3 is: when there is reverse charging; the grid voltage of P raceway groove second metal-oxide-semiconductor field effect transistor Q5 is turned off by pull-up the 8th resistance R8; make the second metal-oxide-semiconductor field effect transistor Q5 be cut-off state, thus circuit is played a protective role.
Claims (6)
1. the control protection electric circuit of a portable power source; comprise lithium battery (1), the charging-discharging controller (IC) be electrically connected with described lithium battery (1) both positive and negative polarity and in order to provide operating voltage to the external power source of described charging-discharging controller (IC); it is characterized in that: between described external power source and described charging-discharging controller (IC), be also electrically connected with overvoltage crowbar (2) and instead fill protective circuit (3); wherein
Described overvoltage crowbar (2) comprises voltage stabilizing didoe (D1), first triode (Q1), second triode (Q2) and the first metal-oxide-semiconductor field effect transistor (Q4), the cathodic electricity of described voltage stabilizing didoe (D1) is connected to described external power source, ground connection after the anode series resistance of described voltage stabilizing didoe (D1), the base stage of described first triode (Q1) is electrically connected on the anode of described voltage stabilizing didoe (D1), the collector electrode of described first triode (Q1) is electrically connected on described external power source, and the collector electrode of described first triode (Q1) is also electrically connected on the base stage of described second triode (Q2) simultaneously, the equal ground connection of emitter of described first triode (Q1) and the second triode (Q2), the collector electrode of described second triode (Q2) is also electrically connected on described external power source, and the collector electrode of described second triode (Q2) is also electrically connected on the grid of described first metal-oxide-semiconductor field effect transistor (Q4) simultaneously, separately the source electrode of described first metal-oxide-semiconductor field effect transistor is electrically connected on described external power source,
Described anti-protective circuit (3) of filling comprises the 5th resistance (R5), 3rd triode (Q3) and the second metal-oxide-semiconductor field effect transistor (Q5), one end of described 5th resistance (R5) is electrically connected on the drain electrode of described first metal-oxide-semiconductor field effect transistor (Q4), the other end of described 5th resistance (R5) is electrically connected on the base stage of described 3rd triode (Q3), the grounded emitter of described 3rd triode (Q3), the collector electrode of described 3rd triode (Q3) is electrically connected on the grid of described second metal-oxide-semiconductor field effect transistor (Q5), and the collector electrode of described 3rd triode (Q3) is also electrically connected on described charging-discharging controller (IC) simultaneously with after the sources connected in parallel of described second metal-oxide-semiconductor field effect transistor (Q5), separately the drain electrode of described second metal-oxide-semiconductor field effect transistor (Q5) also electricity be connected to the drain electrode of described first metal-oxide-semiconductor field effect transistor (Q4).
2. the control protection electric circuit of portable power source according to claim 1, is characterized in that: described charging-discharging controller (IC) is integrated with Buck-Boost translation circuit.
3. the control protection electric circuit of portable power source according to claim 2, is characterized in that: described overvoltage crowbar (2) is electrically connected on described external power source by micro USB interface;
Another described overvoltage crowbar (2) also includes first, second and third and four resistance (R1, R2, R3, R4), the anode of described voltage stabilizing didoe (D1) is connected ground connection after the first resistance (R1) and the second resistance (R2) dividing potential drop successively, and the base stage of described first triode (Q1) is electrically connected between described first resistance and the second resistance; Be electrically connected on described external power source after collector electrode series connection the 3rd resistance (R3) of described first triode (Q1), after collector electrode series connection the 4th resistance (R4) of described second triode, be electrically connected on described external power source.
4. the control protection electric circuit of portable power source according to claim 2, it is characterized in that: described anti-protective circuit (3) of filling also includes the 6th, seven and eight resistance (R6, R7, R8), the base stage of described 3rd triode (Q3) is electrically connected on the other end of described 5th resistance (R5) through described 6th resistance (R6), and the other end of described 5th resistance (R5) also simultaneously ground connection after the 7th resistance (R7) of connecting; Separately the collector electrode of described 3rd triode (Q3) is also electrically connected on described charging-discharging controller (IC) after the 8th resistance (R8) of connecting.
5. the control protection electric circuit of portable power source according to claim 2; it is characterized in that: between described charging-discharging controller (IC) and lithium battery, be also electrically connected with overcurrent protector (4), described overcurrent protector (4) adopts the single battery protection IC of R5478 model.
6. the control protection electric circuit of portable power source according to claim 2; it is characterized in that: this control protection electric circuit also includes current limit detector (5), overtemperature protector (6) and pressurizer (7), and described current limit detector, overtemperature protector and pressurizer are electrically connected on described charging-discharging controller (IC) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495870.6U CN204118791U (en) | 2014-08-29 | 2014-08-29 | The control protection electric circuit of portable power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495870.6U CN204118791U (en) | 2014-08-29 | 2014-08-29 | The control protection electric circuit of portable power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204118791U true CN204118791U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420495870.6U Expired - Fee Related CN204118791U (en) | 2014-08-29 | 2014-08-29 | The control protection electric circuit of portable power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204118791U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401360A (en) * | 2019-08-14 | 2019-11-01 | 成都克伏特航空设备有限公司 | A kind of output system of passive signal |
| CN110783986A (en) * | 2019-11-06 | 2020-02-11 | 国网山西省电力公司忻州供电公司 | Power supply circuit and portable power source |
-
2014
- 2014-08-29 CN CN201420495870.6U patent/CN204118791U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401360A (en) * | 2019-08-14 | 2019-11-01 | 成都克伏特航空设备有限公司 | A kind of output system of passive signal |
| CN110783986A (en) * | 2019-11-06 | 2020-02-11 | 国网山西省电力公司忻州供电公司 | Power supply circuit and portable power source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20170829 |