CN203617764U - Charging circuit with cell polarity reversal connection protection - Google Patents
Charging circuit with cell polarity reversal connection protection Download PDFInfo
- Publication number
- CN203617764U CN203617764U CN201320879998.8U CN201320879998U CN203617764U CN 203617764 U CN203617764 U CN 203617764U CN 201320879998 U CN201320879998 U CN 201320879998U CN 203617764 U CN203617764 U CN 203617764U
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- triode
- resistance
- circuit
- constant current
- battery
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- 230000001681 protective effect Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a charging circuit with cell polarity reversal connection protection. The charging circuit comprises a constant current output circuit used for charging a cell with correct polarity connection in a constant current mode and a polarity protection circuit connected with an output end and used for detecting correct connection of the electrode of the output end and an electrode of a cell or not. When the polarity connection is correct, the constant current is turned on and charging is carried out. When the polarity reversal connection is carried out, the constant current output is closed, and damage of the cell and the circuit is prevented. The charging circuit is formed through connection of cheap discrete electronic components. The charging circuit is simple in structure and is convenient to debug. Through combination of the electronic components, the charging circuit prevents damage of the cell and the circuit caused by cell polarity reversal connection effectively. The product reliability is raised greatly and the product service life is prolonged greatly.
Description
Technical field
The utility model relates to battery charger technical field, more specifically, relates to a kind of charging circuit with battery polar reverse connecting protection being made up of plain type discrete device.
Background technology
At present, conventional charging circuit all needs to have the positive and negative electrode of corresponding its output, otherwise will damage battery or charging circuit.
Utility model content
The purpose of this utility model is to provide a kind of charging circuit with battery polar reverse connecting protection being made up of simple and easy discrete device; to carry out identification protecting by a simple circuit; realize when connecing inverse time circuit and close output, can not cause damage to battery and circuit.
The purpose of this utility model is to be achieved through the following technical solutions:
There is a charging circuit for battery polar reverse connecting protection, comprise for to the battery constant current output circuit charging in the mode of constant current and the electrode for detection of output being connected with its output of polarity exact connect ion and the whether correct polar protective circuit of battery electrode.In the time that polarity is correct, open constant current and charge, in the time of reverse polarity connection, will close constant current output, prevent the damage of battery and circuit.
In the preferred scheme of one, described constant current output circuit comprises LED, resistance R 1, resistance R 2 and triode Q2, the positive pole of described LED is connected and receives power supply VCC again with one end of resistance R 1, and the other end of resistance R 1 is connected with the emitter of triode Q2; The negative pole of LED is connected with one end of resistance R 2 and the base stage of triode Q2; Another termination polar protective circuit of resistance R 2, the collector electrode of triode Q2 connects polar protective circuit.
In the preferred scheme of one; described polar protective circuit comprises triode Q1 and resistance R 1; the collector electrode of triode Q1 connects the other end of resistance R 2 in constant current output circuit; one end of the base stage connecting resistance R3 of triode Q1; the collector electrode of triode Q2 in another termination constant current output circuit of resistance R 3; the emitter of triode Q1 meets the GND of power supply, and the other end of resistance R 3 is the anode of output, the battery cathode that the transmitting of triode Q1 is very exported.
The beneficial effects of the utility model are: the utility model is formed by connecting by cheap discrete electronic component, and circuit structure is simple, and debugging is convenient; The utility model, by the combination of electronic component, is effectively protected the damage that causes circuit and battery because of when battery pole back connection, and has greatly been damaged high reliability and the useful life of product.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the utility model specific embodiment 1.
Fig. 2 is the circuit theory diagrams of the utility model specific embodiment 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described, but execution mode of the present utility model is not limited to this.
Specific embodiment 1:
As Fig. 1; there is a charging circuit for battery polar reverse connecting protection, comprise for to the battery constant current output circuit charging in the mode of constant current and the electrode for detection of output being connected with its output of polarity exact connect ion and the whether correct polar protective circuit of battery electrode.
As Fig. 2, constant current output circuit 1 comprises LED, resistance R 1, resistance R 2 and triode Q2, and the positive pole of described LED is connected and receives power supply VCC again with one end of resistance R 1, and the other end of resistance R 1 is connected with the emitter of triode Q2; The negative pole of LED is connected with one end of resistance R 2 and the base stage of triode Q2; Described polar protective circuit comprises triode Q1 and resistance R 1, the other end of the collector electrode connecting resistance R2 of triode Q1, one end of the base stage connecting resistance R3 of triode Q1, the collector electrode of another termination triode Q2 of resistance R 3 anode as output.The emitter of triode Q1 connects the GND of power supply the battery cathode as output.
The operation principle of the present embodiment:
As shown in Figure 2, VCC and GND receive respectively positive pole and the negative pole of power supply.In the time that output electrode does not connect battery, circuit is in closed condition, and whole circuit does not have electric current.When in correct connection when battery, battery provides a forward bias voltage to triode Q1, and electric current provides a bias voltage to triode Q1 through resistance R 3, and triode Q1 conducting, causes also conducting of triode Q2; Electric current arrives triode Q1 to the base stage that is transmitted into of triode Q2 through resistance R 2 more again through resistance R 1, and triode Q2 conducting, charges to battery.After triode Q1 conducting simultaneously, LED is lighted and is played indicative function.Due to the effect of the emitter resistance R1 of triode Q2, in the time that electric current increases, the pressure drop of resistance R 1 also raises, and causes the VBE of triode Q2 to reduce, and the collector current of triode Q2 also reduces thereupon, can only be limited in certain scope.When battery connects inverse time, triode Q1 can not conducting, and whole circuit, in closed condition, plays a protective role.
The above; it is only preferably specific embodiment of the utility model; but protection range of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose scope in; be equal to replacement or changed according to the technical solution of the utility model and utility model design thereof, all being belonged to protection range of the present utility model.
Claims (3)
1. one kind has the charging circuit of battery polar reverse connecting protection; it is characterized in that, comprise for to the battery constant current output circuit (1) charging in the mode of constant current and the electrode for detection of output being connected with its output of polarity exact connect ion and the whether correct polar protective circuit (2) of battery electrode.
2. the charging circuit with battery polar reverse connecting protection according to claim 1, it is characterized in that, described constant current output circuit (1) comprises LED, resistance R 1, resistance R 2 and triode Q2, the positive pole of described LED is connected and receives power supply VCC again with one end of resistance R 1, and the other end of resistance R 1 is connected with the emitter of triode Q2; The negative pole of LED is connected with one end of resistance R 2 and the base stage of triode Q2; Another termination polar protective circuit (2) of resistance R 2, the collector electrode of triode Q2 connects polar protective circuit (2).
3. the charging circuit with battery polar reverse connecting protection according to claim 2; it is characterized in that; polar protective circuit (2) comprises triode Q1 and resistance R 1; the collector electrode of triode Q1 connects the other end of resistance R 2 in constant current output circuit (1); one end of the base stage connecting resistance R3 of triode Q1; the collector electrode of triode Q2 in another termination constant current output circuit (1) of resistance R 3; the emitter of triode Q1 meets the GND of power supply; the other end of resistance R 3 is the anode of output, the battery cathode that the transmitting of triode Q1 is very exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879998.8U CN203617764U (en) | 2013-12-30 | 2013-12-30 | Charging circuit with cell polarity reversal connection protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879998.8U CN203617764U (en) | 2013-12-30 | 2013-12-30 | Charging circuit with cell polarity reversal connection protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617764U true CN203617764U (en) | 2014-05-28 |
Family
ID=50770386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320879998.8U Expired - Lifetime CN203617764U (en) | 2013-12-30 | 2013-12-30 | Charging circuit with cell polarity reversal connection protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092259A (en) * | 2014-07-11 | 2014-10-08 | 常州华达科捷光电仪器有限公司 | Charging protection circuit used for rechargeable battery |
-
2013
- 2013-12-30 CN CN201320879998.8U patent/CN203617764U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092259A (en) * | 2014-07-11 | 2014-10-08 | 常州华达科捷光电仪器有限公司 | Charging protection circuit used for rechargeable battery |
| CN104092259B (en) * | 2014-07-11 | 2016-06-22 | 常州华达科捷光电仪器有限公司 | A kind of charge protector for rechargeable battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |