CN202931003U - Battery charging circuit and power supply circuit - Google Patents
Battery charging circuit and power supply circuit Download PDFInfo
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- CN202931003U CN202931003U CN 201220664058 CN201220664058U CN202931003U CN 202931003 U CN202931003 U CN 202931003U CN 201220664058 CN201220664058 CN 201220664058 CN 201220664058 U CN201220664058 U CN 201220664058U CN 202931003 U CN202931003 U CN 202931003U
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Abstract
The utility model discloses a battery charging circuit and a power supply circuit with the battery charging circuit. The battery charging circuit is used for charging rechargeable batteries which provide a load with a power supply. The battery charging circuit comprises a charging module, a control module and a switching module, wherein the charging module is used for charging the rechargeable batteries; the control module comprises a first field-effect tube which is connected with the charging module and is used for controlling the connection state of an input end of the charging module and the load according to the charging state of the rechargeable batteries; and the switching module is connected with the charging module and is used for controlling the connection state of the rechargeable batteries and the load according to the charging state of the rechargeable batteries. According to the utility model, power conversion is realized, and simultaneously electric energy loss of the circuit is reduced.
Description
Technical field
The utility model relates to charging technique field, particularly a kind of battery charger and power supply circuits.
Background technology
As everyone knows, be equipped with in general electronic equipment and electrical equipment and provide the rechargeable battery of power supply and the battery charger that this rechargeable battery is charged for load.With reference to shown in Figure 1, Fig. 1 is conventional batteries charging circuit structural representation.In prior art, battery charger comprises charging module 20, the second diode D2, the 3rd diode D3 and is connected connecting the positive voltage input Vi of external power supply positive voltage, wherein the input of charging module 20 is connected with positive voltage input Vi, output connects the positive pole of rechargeable battery 10, and the negative pole of this rechargeable battery is the common ground end; The end of load R0 is connected with the negative electrode of the second diode D2 and the 3rd diode D3 respectively, and the other end is connected with the common ground end; The anode of the second diode D2 is connected with the positive pole of rechargeable battery 10; The anode of the 3rd diode D3 is connected with positive voltage input Vi.When external power supply is inputted forward voltage from positive voltage input Vi, due to the voltage of the external power supply voltage higher than rechargeable battery 10, thereby make the second diode D2 cut-off, the 3rd diode D3 conducting, thereby realize electrical source exchange, but due to the conducting voltage with 0.7V to 1.2V at diode two ends, when the electric current of load is larger, the power that makes diode consume is larger, thereby causes the electric energy loss of battery charger higher.
The utility model content
Main purpose of the present utility model is to provide a kind of battery charger, is intended to realize the power supply conversion, reduces simultaneously the electric energy loss of circuit.
To achieve these goals, the utility model provides a kind of battery charger, and this battery charger is used for provide the rechargeable battery of power supply to charge for load, and it comprises:
Charging module is used for described rechargeable battery is charged;
Control module comprises the first field effect transistor, and this first field effect transistor is connected with described charging module, controls the input of described charging module and the connection status of load with the charged state according to rechargeable battery;
Handover module is connected with described charging module, to control the connection status of rechargeable battery and load according to the charged state of rechargeable battery.
Preferably, described battery charger also comprises the first diode and the positive voltage input that is used for connecting the external power supply positive voltage, the anodic bonding of this positive voltage input and described the first diode, the negative electrode of this first diode is connected with the input of described charging module.
Preferably, described control module also comprises the first resistance, the second resistance, the 3rd resistance and the first triode, the source electrode of described the first field effect transistor is connected with the input of described charging module, and drain electrode is connected with load, and grid is connected with the collector electrode of described the first triode by the first resistance; The first triode is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with the common ground end, also is connected with described positive voltage input by the 3rd resistance by the second resistance.
Preferably, described control module also comprises an electric capacity, and an end of this electric capacity is connected with the base stage of described the first triode, and the other end is connected with the common ground end.
Preferably, described handover module comprises the 4th resistance, the 5th resistance, the 6th resistance, the second field effect transistor, the second triode and the 3rd triode, wherein the drain electrode of the second field effect transistor is connected with the positive pole of rechargeable battery, source electrode is connected with described load, and grid is connected with the collector electrode of the second triode by the 4th resistance; The second triode is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with the source electrode of described the second field effect transistor by the 5th resistance; The 3rd triode is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with described positive voltage input by the 6th resistance, and collector electrode is connected with the base stage of described the second triode.
Preferably, described battery charger also comprises test module, this test module comprises the 7th resistance, the 8th resistance, the 4th triode and the 5th triode, wherein the 4th triode is the NPN triode, its emitter is connected with the common ground end, and base stage is connected with the base stage of the 8th resistance with the 5th triode by the 7th resistance of series connection, and collector electrode is connected with the base stage of the 3rd triode; The 5th triode is the NPN triode, and its emitter is connected with the common ground end, and collector electrode is connected with the base stage of the first triode.
The utility model also provides a kind of power supply circuits, these power supply circuits comprise battery, load and battery charger, wherein battery charger is connected with battery, so that described battery is charged, and controls the connection status of battery and load according to the charged state of battery; Described battery charger comprises:
Charging module is used for described rechargeable battery is charged;
Control module comprises the first field effect transistor, and this first field effect transistor is connected with described charging module, controls the input of described charging module and the connection status of load with the charged state according to rechargeable battery;
Handover module is connected with described charging module, to control the connection status of rechargeable battery and load according to the charged state of rechargeable battery.
The utility model is by arranging the first field effect transistor when rechargeable battery enters charged state, and the input of controlling charging module is connected with load, is disconnected by handover module control rechargeable battery and load simultaneously, thereby has realized electrical source exchange.Be resistive during due to the field effect transistor conducting, and conducting resistance is less, so the pressure drop at its two ends is less during conducting, thereby has reduced the electric energy loss of circuit, more be suitable for people and use.
Description of drawings
Fig. 1 is conventional batteries charging circuit structural representation;
Fig. 2 is the structural representation of the utility model battery charger one embodiment.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
With reference to Fig. 2, Fig. 2 is the structural representation of the utility model battery charger one embodiment.The battery charger that the present embodiment provides is used for provide the rechargeable battery 10 of power supply to charge for load R0, and this battery charger comprises:
In the present embodiment, when rechargeable battery 10 is not in charged state, handover module 40 will be controlled rechargeable battery 10 and load R0 electrical connection, thereby provide power supply for load R0.When external power supply to charging module 20 so that rechargeable battery 10 is charged, to output control signals to the first field effect transistor Q11 by control module 30, the input that this first field effect transistor Q11 controls charging module 20 according to this control signal is connected with load R0, control rechargeable battery 10 by handover module 40 simultaneously and disconnect with load R0, thereby by external power supply, load R0 is powered.
The utility model is by arranging the first field effect transistor Q11 when rechargeable battery 10 enters charged state, the input of controlling charging module 20 is connected with load R0, control rechargeable battery 10 by handover module 40 simultaneously and disconnect with load R0, thereby realized electrical source exchange.Be resistive during due to the field effect transistor conducting, and conducting resistance is less, so the pressure drop at its two ends is less during conducting, thereby has reduced the electric energy loss of circuit, more be suitable for people and use.
Further, based on above-described embodiment, in the present embodiment, above-mentioned battery charger also comprises the first diode D1 and the positive voltage input Vi that is used for connecting the external power supply positive voltage, the anodic bonding of this positive voltage input Vi and the first diode D1, the negative electrode of this first diode D1 is connected with the input of charging module 20.
When external power supply is inputted positive voltage from positive voltage input Vi, the first diode D1 conducting, and charge by 20 pairs of rechargeable batteries 10 of charging module, when external power supply is inputted negative voltage from positive voltage input Vi, the first diode D1 cut-off.Therefore, by being set, the first diode D1 can effectively prevent from connecing instead because of external power supply.
Particularly, above-mentioned control module 30 also comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the first triode Q1, the source electrode of above-mentioned the first field effect transistor Q11 is connected with the input of charging module 20, drain electrode is connected with load R0, and grid is connected with the collector electrode of the first triode Q1 by the first resistance R 1; The first triode Q1 is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with the common ground end, also is connected with positive voltage input Vi by the 3rd resistance R 3 by the second resistance R 2.
During work, when external power supply during from positive voltage input Vi input positive voltage, after external power supply carried out dividing potential drop through the second resistance R 2 and the 3rd resistance R 3, making the base stage of the first triode Q1 was high level, thereby makes the first triode Q1 conducting; After this first triode Q1 conducting, cause the first field effect transistor Q11 conducting, thereby make the input of charging module 20 be connected with load R0, R0 provides power supply for load.
Further, above-mentioned control module 30 also comprises a capacitor C 1, and an end of this capacitor C 1 is connected with the base stage of the first triode Q1, and the other end is connected with the common ground end.
During work, above-mentioned external power supply charges to capacitor C 1 after carrying out dividing potential drop by the second resistance R 2 and the 3rd resistance R 3, when the voltage at capacitor C 1 two ends during greater than the conducting voltage of the first triode Q1, the first triode Q1 just enters conducting state, the first field effect transistor Q11 conducting this moment.By the base stage at the first triode Q1, capacitor C 1 is set in the present embodiment, thereby the time that can effectively postpone the first field effect transistor Q11 conducting, thereby can guarantee after rechargeable battery 10 and being connected of load R0 disconnect, just make the input of charging module 20 be connected with load R0, therefore can prevent crossover current.
Particularly, above-mentioned handover module 40 comprises the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the second field effect transistor Q12, the second triode Q2 and the 3rd triode Q3, wherein the drain electrode of the second field effect transistor Q12 is connected with the positive pole of rechargeable battery 10, source electrode is connected with load R0, and grid is connected with the collector electrode of the second triode Q2 by the 4th resistance R 4; The second triode Q2 is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with the source electrode of the second field effect transistor Q12 by the 5th resistance R 5; The 3rd triode Q3 is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with positive voltage input Vi by the 6th resistance R 6, and collector electrode is connected with the base stage of the second triode Q2.
In the present embodiment, when without external power supply, the second field effect transistor Q12 and the second triode Q2 conducting, thus making rechargeable battery 10 and load R0 electrical connection, R0 provides power supply for load.When external power supply, the 3rd triode Q3 conducting, thus making the second field effect transistor Q12 and the second triode Q2 cut-off, disconnection rechargeable battery 10 is connected with load R0's.
Further, based on above-described embodiment, in the present embodiment, above-mentioned battery charger also comprises test module 50, and this test module 50 comprises the 7th resistance R 7, the 8th resistance R 8, the four triode Q4 and the 5th triode Q5, wherein the 4th triode Q4 is the NPN triode, its emitter is connected with the common ground end, and base stage is connected with the base stage of the 5th triode Q5 with the 8th resistance R 8 by the 7th resistance R 7 of series connection, and collector electrode is connected with the base stage of the 3rd triode Q3; The 5th triode Q5 is the NPN triode, and its emitter is connected with the common ground end, and collector electrode is connected with the base stage of the first triode Q1.
In the present embodiment, the link of above-mentioned the 7th resistance R 7 and the 8th resistance R 8 can be set to test lead TEST, when this test lead TEST input high level, and the 5th triode Q5 conducting, thus cause the first triode Q1 and the first field effect transistor Q11 conducting; The 4th triode Q4 conducting simultaneously makes the 3rd triode Q3 conducting, thereby causes the second triode Q2 and the second field effect transistor Q12 cut-off.The present embodiment is realized the switching of power supply by test module is set, therefore possess the test of not cutting off the power supply and switch the function that whether can work.
The utility model also provides a kind of power supply circuits, these power supply circuits comprise battery, load and battery charger, wherein battery charger is connected with battery, so that described battery is charged, and controls the connection status of battery and load according to the charged state of battery.The circuit structure of described battery charger and principle can with reference to aforementioned, not repeat them here.Naturally, adopted the technical scheme of above-mentioned battery charger due to the power supply circuits of the present embodiment, so these power supply circuits have all beneficial effects of above-mentioned battery charger.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (7)
1. a battery charger, be used for provide the rechargeable battery of power supply to charge for load, it is characterized in that, comprising:
Charging module is used for described rechargeable battery is charged;
Control module comprises the first field effect transistor, and this first field effect transistor is connected with described charging module, controls the input of described charging module and the connection status of load with the charged state according to rechargeable battery;
Handover module is connected with described charging module, to control the connection status of rechargeable battery and load according to the charged state of rechargeable battery.
2. battery charger as claimed in claim 1, it is characterized in that, described battery charger also comprises the first diode and the positive voltage input that is used for connecting the external power supply positive voltage, the anodic bonding of this positive voltage input and described the first diode, the negative electrode of this first diode is connected with the input of described charging module.
3. battery charger as claimed in claim 2, it is characterized in that, described control module also comprises the first resistance, the second resistance, the 3rd resistance and the first triode, the source electrode of described the first field effect transistor is connected with the input of described charging module, drain electrode is connected with load, and grid is connected with the collector electrode of described the first triode by the first resistance; The first triode is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with the common ground end, also is connected with described positive voltage input by the 3rd resistance by the second resistance.
4. battery charger as claimed in claim 3, is characterized in that, described control module also comprises an electric capacity, and an end of this electric capacity is connected with the base stage of described the first triode, and the other end is connected with the common ground end.
5. battery charger as described in claim 3 or 4, it is characterized in that, described handover module comprises the 4th resistance, the 5th resistance, the 6th resistance, the second field effect transistor, the second triode and the 3rd triode, wherein the drain electrode of the second field effect transistor is connected with the positive pole of rechargeable battery, source electrode is connected with described load, and grid is connected with the collector electrode of the second triode by the 4th resistance; The second triode is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with the source electrode of described the second field effect transistor by the 5th resistance; The 3rd triode is the NPN triode, and its emitter is connected with the common ground end, and base stage is connected with described positive voltage input by the 6th resistance, and collector electrode is connected with the base stage of described the second triode.
6. battery charger as claimed in claim 5, it is characterized in that, described battery charger also comprises test module, this test module comprises the 7th resistance, the 8th resistance, the 4th triode and the 5th triode, wherein the 4th triode is the NPN triode, its emitter is connected with the common ground end, base stage is connected with the base stage of the 8th resistance with the 5th triode by the 7th resistance of series connection, and collector electrode is connected with the base stage of the 3rd triode; The 5th triode is the NPN triode, and its emitter is connected with the common ground end, and collector electrode is connected with the base stage of the first triode.
7. power supply circuits, is characterized in that, comprises battery, load and battery charger, and wherein battery charger is connected with battery, so that described battery is charged, and controls the connection status of battery and load according to the charged state of battery; Described battery charger is the described battery charger of any one in claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220664058 CN202931003U (en) | 2012-12-05 | 2012-12-05 | Battery charging circuit and power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220664058 CN202931003U (en) | 2012-12-05 | 2012-12-05 | Battery charging circuit and power supply circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202931003U true CN202931003U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220664058 Expired - Fee Related CN202931003U (en) | 2012-12-05 | 2012-12-05 | Battery charging circuit and power supply circuit |
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| CN (1) | CN202931003U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326433A (en) * | 2013-06-19 | 2013-09-25 | 深圳市科曼医疗设备有限公司 | Power supply control circuit for portable device and portable monitor |
| CN107657307A (en) * | 2017-10-24 | 2018-02-02 | 王阳 | Bluetooth electronic tag system and localization method |
| CN109426292A (en) * | 2017-08-29 | 2019-03-05 | 华为技术有限公司 | Multiple feed circuit |
| CN114079302A (en) * | 2020-08-18 | 2022-02-22 | 荣耀终端有限公司 | Charging circuit, charging chip, electronic device and charging method |
-
2012
- 2012-12-05 CN CN 201220664058 patent/CN202931003U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326433A (en) * | 2013-06-19 | 2013-09-25 | 深圳市科曼医疗设备有限公司 | Power supply control circuit for portable device and portable monitor |
| CN103326433B (en) * | 2013-06-19 | 2015-09-16 | 深圳市科曼医疗设备有限公司 | Powering portable devices control circuit and portable monitor |
| CN109426292A (en) * | 2017-08-29 | 2019-03-05 | 华为技术有限公司 | Multiple feed circuit |
| CN107657307A (en) * | 2017-10-24 | 2018-02-02 | 王阳 | Bluetooth electronic tag system and localization method |
| CN114079302A (en) * | 2020-08-18 | 2022-02-22 | 荣耀终端有限公司 | Charging circuit, charging chip, electronic device and charging method |
| CN114079302B (en) * | 2020-08-18 | 2022-12-02 | 荣耀终端有限公司 | Charging circuit, charging chip, electronic device and charging method |
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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: 20130508 Termination date: 20201205 |