CN203026979U - Charging power supplying circuit and charging power supplying device - Google Patents
Charging power supplying circuit and charging power supplying device Download PDFInfo
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- CN203026979U CN203026979U CN 201220682692 CN201220682692U CN203026979U CN 203026979 U CN203026979 U CN 203026979U CN 201220682692 CN201220682692 CN 201220682692 CN 201220682692 U CN201220682692 U CN 201220682692U CN 203026979 U CN203026979 U CN 203026979U
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- charging
- voltage follower
- triode
- follower circuit
- battery
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Abstract
The utility model provides a charging power supplying circuit and a charging power supplying device. The charging power supplying circuit comprises a charging module and a voltage follower circuit, wherein the charging module is provided with an input end for being connected with an input power supply, and an output end which is used for being connected with a battery to be charged and is used for charging the battery; the voltage follower circuit comprises an input end, a control end and an output end; the input end of the voltage follower circuit is connected with the input end of the charting module; the control end of the voltage follower circuit is connected with the output end of the charging module; the output end of the voltage follower circuit is used for being connected with a load needing to be powered; the voltage follower circuit is used for supplying power to the load through the output end; and the input end of the charging module and the output end of the voltage follower circuit are separated through the control end so as to prevent influencing on charging the battery when power is supplied to the load. The charging power supplying circuit disclosed by the utility model can supply the power to the load and can also normally charge the battery.
Description
Technical field
The utility model relates to field of power supplies, relates in particular to a kind of charging circuit and charging device.
Background technology
At present, the secondary cell that has many electronic equipments and electrical equipment to use recharge to use is commonly called as rechargeable battery or storage battery.Such battery is a lot, and lead-acid battery, nickel-cadmium cell, Ni-MH battery, lithium ion battery and lithium polymer battery etc. are arranged.Their characteristic is different, but common characteristic is repeated charge to use hundreds of times to thousands of times.Such battery has a very important characteristic, is exactly to arrive certain degree when battery discharge, and be generally 80% left and right, just need in time charging, otherwise influential to the life-span of battery.If discharge surpasses 80%, untimely charging again may cause the number of times that recycles of battery to reduce greatly.The general device of rechargeable battery that uses is all provided charging circuit for oneself, as shown in Figure 1, is the circuit connection diagram of a kind of cheap electronic product commonly used charging device used.In this charging device, charging module 10 is connected between input power Vi and battery BT to be charged, and load RL is directly parallel in battery BT two ends.Although this circuit is very simple, the shortcoming that can't overcome is arranged.If when battery BT was charged, load RL did not work, this circuit can work.But for some electronic product, as wireless audio amplifier, portable MP 3 player etc., all using simultaneously possibly in charging.So, the electric current of charging all flow in load RL and has gone, and make the electric current of current ratio charging of the load RL that flows through also large, and battery BT also will provide one part of current, causes charging normally to carry out, if battery does not have electricity, even power supply also can't be normal.
The utility model content
Main purpose of the present utility model is to provide a kind of charging circuit and charging device, is intended to realize can charge normally to battery in to load supplying.
to achieve these goals, the utility model provides a kind of charging circuit, comprise charging module, described charging module has the input that is connected for input power, and be used for being connected with the output that battery is charged with battery to be charged, described charging circuit also comprises voltage follower circuit, described voltage follower circuit comprises input, control end and output, the input of described voltage follower circuit is connected with the input of described charging module, the control end of described voltage follower circuit is connected with the output of described charging module, the output of described voltage follower circuit is used for being connected with the load of need power supply, described voltage follower circuit powers to the load by described output, and charging exerts an influence to battery when by control end, the output of the output of described charging module and described voltage follower circuit being isolated to avoid powering to the load.
preferably, described voltage follower circuit comprises resistance, the first triode of NPN type and the second triode of positive-negative-positive, the base stage of described the first triode is connected with the input of described charging module by resistance, the collector electrode of described the first triode is connected with the input of described charging module, the emitter of described the first triode is used for being connected with the load of need power supply, the base stage of described the second triode is connected with the output of described charging module, the collector electrode of described the second triode is connected with the emitter of the first triode, the emitter of described the second triode is connected with the base stage of the first triode.
The utility model also provides a kind of charging device, and described charging device comprises aforesaid charging circuit.
Preferably, described charging device further comprises battery and load, and described battery is connected with the output of charging module, and described load is connected with the output of voltage follower circuit.
Preferably, the described charging device charging device that is wireless sound box or portable player.
In the utility model charging circuit, by adopting voltage follower circuit, load and battery are kept apart, both are independent of each other, when being load supplying, can charge normal battery simultaneously, and can make voltage for load supplying equal voltage to the battery charging, and current supply circuit and charge circuit are isolated, and power supply does not exert an influence to charging.
Description of drawings
Fig. 1 is the connection diagram of existing charging circuit.
Fig. 2 is the connection diagram of the utility model charging circuit.
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 embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 2, charging circuit of the present utility model, comprise charging module 10 and voltage follower circuit 20, described charging module 10 has for the input 11 that is connected with input power Vi and is used for being connected with the output 12 that battery BT is charged with battery BT to be charged, and described voltage follower circuit 20 comprises input 21, control end 22 and output 23.The input 21 of described voltage follower circuit 20 is connected with the input 11 of described charging module 10, the control end 22 of described voltage follower circuit 20 is connected with the output 12 of described charging module 10, the output 23 of described voltage follower circuit 20 is used for being connected with the load RL of need power supply, described voltage follower circuit 20, and charges to battery when by control end 22, the output 12 of described charging module 10 being isolated to avoid power to load RL with the output 23 of described voltage follower circuit 20 and exerts an influence to load RL power supply by described output 21.
Described voltage follower circuit 20 comprises the first triode Q1 of resistance R 1, NPN type and the second triode Q2 of positive-negative-positive.The base stage of described the first triode Q1 be connected with the input 11 of described charging module 10 by resistance R 1 (input 21 that namely is connected to described voltage follower circuit 20), the collector electrode of described the first triode Q1 is connected with the input 11 of described charging module 10 (input 21 that namely is connected to described voltage follower circuit 20), and the emitter of described the first triode Q1 is used for be connected with the load RL of need power supply (output 23 that namely is connected to described voltage follower circuit 20).The base stage of described the second triode Q2 be connected with the output 12 of described charging module 10 (control end 22 that namely is connected to described voltage follower circuit 20), the collector electrode of described the second triode Q2 is connected with the emitter of the first triode Q1, and the emitter of described the second triode Q2 is connected with the base stage of the first triode Q1.
Described charging circuit application is in the charging device time, and charging module 10 is connected between input power Vi and battery BT to be charged, to give battery BT constant current charge.When charging for battery BT and powering to load RL simultaneously, the high 0.7V of voltage of the emitter voltage comparison battery BT charging of the second triode Q2 of voltage follower circuit 20, the emitter voltage of the first triode Q1 hangs down 0.7V than the emitter voltage of the second triode Q2 again, so, the emitter voltage of the first triode Q1 just equals the voltage to battery BT charging.The power supply of load RL comes from input power Vi, and input power Vi is load R1 power supply by the first triode Q1, and the voltage of load RL power supply is equaled voltage to battery BT charging.The effect of R1 is to provide base current for the first triode Q1.
Described charging device can be the charging device of electronic product such as wireless sound box or portable player etc.
Described charging circuit is independent of each other both by adopting voltage follower circuit 20 that load RL and battery BT are kept apart.When powering for load RL, can charge normal battery BT simultaneously, and can make the voltage of powering for load RL equal the voltage that battery BT is charged, current supply circuit and charge circuit are isolated, and power supply does not exert an influence to charging.
The utility model is not limited to above execution mode, under the disclosed technology contents of above-mentioned execution mode, can also carry out various variations.Every equivalent structure transformation 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 (5)
1. charging circuit, comprise charging module, described charging module has the input that is connected for input power, and be used for being connected with the output that battery is charged with battery to be charged, it is characterized in that, described charging circuit also comprises voltage follower circuit, described voltage follower circuit comprises input, control end and output, the input of described voltage follower circuit is connected with the input of described charging module, the control end of described voltage follower circuit is connected with the output of described charging module, the output of described voltage follower circuit is used for being connected with the load of need power supply, described voltage follower circuit powers to the load by described output, and by the output isolation of control end with output and the described voltage follower circuit of described charging module.
2. charging circuit as claimed in claim 1, it is characterized in that, described voltage follower circuit comprises resistance, the first triode of NPN type and the second triode of positive-negative-positive, the base stage of described the first triode is connected with the input of described charging module by resistance, the collector electrode of described the first triode is connected with the input of described charging module, the emitter of described the first triode is used for being connected with the load of need power supply, the base stage of described the second triode is connected with the output of described charging module, the collector electrode of described the second triode is connected with the emitter of the first triode, the emitter of described the second triode is connected with the base stage of the first triode.
3. a charging device, is characterized in that, described charging device comprises charging circuit as claimed in claim 1 or 2.
4. charging device as claimed in claim 3, is characterized in that, described charging device further comprises battery and load, and described battery is connected with the output of charging module, and described load is connected with the output of voltage follower circuit.
5. charging device as claimed in claim 3, is characterized in that, the charging device that described charging device is wireless sound box or portable player.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220682692 CN203026979U (en) | 2012-12-11 | 2012-12-11 | Charging power supplying circuit and charging power supplying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220682692 CN203026979U (en) | 2012-12-11 | 2012-12-11 | Charging power supplying circuit and charging power supplying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026979U true CN203026979U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220682692 Expired - Lifetime CN203026979U (en) | 2012-12-11 | 2012-12-11 | Charging power supplying circuit and charging power supplying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203026979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113206525A (en) * | 2021-05-06 | 2021-08-03 | 秦佳电气有限公司 | Electric power energy storage control assembly |
-
2012
- 2012-12-11 CN CN 201220682692 patent/CN203026979U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113206525A (en) * | 2021-05-06 | 2021-08-03 | 秦佳电气有限公司 | Electric power energy storage control assembly |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |
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| CX01 | Expiry of patent term |