CN211453875U - Circuit for judging battery voltage and outputting different control signals - Google Patents
Circuit for judging battery voltage and outputting different control signals Download PDFInfo
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- CN211453875U CN211453875U CN201921919968.9U CN201921919968U CN211453875U CN 211453875 U CN211453875 U CN 211453875U CN 201921919968 U CN201921919968 U CN 201921919968U CN 211453875 U CN211453875 U CN 211453875U
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- operational amplifier
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Abstract
The utility model discloses a judge battery voltage and export different control signal return circuits, it includes first resistance etc, first resistance, the second resistance, connect in parallel each other between the ninth resistance three, the one end of first resistance, the one end of second resistance, the one end of ninth resistance all links to each other with the one end of tenth resistance, emitting diode's one end, the one end of second electric capacity, the one end of third electric capacity, the fifteenth resistance all links to each other with the other end of tenth resistance, the one end of third resistance links to each other with second operational amplifier's output, the other end of third resistance, the one end of twelfth resistance all links to each other with the grid of MOS pipe, the one end of eleventh resistance links to each other with the source electrode of MOS pipe. The utility model is used for lithium battery charger judges battery voltage to according to the different control signal of battery voltage output.
Description
Technical Field
The utility model relates to a return circuit especially relates to a judge battery voltage and export different control signal return circuits.
Background
The traditional charger can not flexibly and quickly judge the voltage of the battery, thereby being difficult to realize the conditions of large current, small current, no charging, error indication and the like, and being inconvenient to use.
Disclosure of Invention
The utility model aims to solve the technical problem that a judge battery voltage and export different control signal return circuits is provided, it is used for lithium battery charger to judge battery voltage to according to the different control signal of exporting of battery voltage.
The utility model discloses a solve above-mentioned technical problem through following technical scheme: a loop for judging battery voltage and outputting different control signals is characterized by comprising a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a transformer, a first capacitor, a second capacitor, a third capacitor, a light-emitting diode, a microprocessor, an MOS (metal oxide semiconductor) tube, a diode, an optical coupler, a first operational amplifier, a second operational amplifier and a joint, wherein the first resistor, the second resistor and the ninth resistor are connected in parallel, one end of the first resistor, one end of the second resistor and one end of the ninth resistor are connected with one end of the tenth resistor, one end of the light-emitting diode, one end of the second capacitor and one end of the third capacitor, A fifteenth resistor is connected with the other end of a tenth resistor, one end of a third resistor is connected with the output end of the second operational amplifier, the other end of the third resistor and one end of a twelfth resistor are connected with the grid electrode of the MOS tube, one end of an eleventh resistor is connected with the source electrode of the MOS tube, one interface of a joint is connected with the drain electrode of the MOS tube, the other end of the eleventh resistor is connected with one end of a first capacitor, the other end of the first capacitor and one end of a diode are connected with the other interface of the joint, the other end of the eleventh resistor, one end of the first capacitor and the other end of the diode are connected with a transformer, a fourth resistor is connected with the inverting input end of the second operational amplifier, a fifth resistor and a sixth resistor are connected with the inverting input end of the second operational amplifier, a fifth resistor is connected with the sixth resistor in series, a seventh resistor is connected with one end of a light emitting diode in the optical coupler, one end of a sixteenth resistor is connected with the other end of a light emitting diode in the optical coupler, the other end of the sixteenth resistor is connected with the output end of the first operational amplifier, an eighth resistor is connected with the inverting input end of the first operational amplifier, the first resistor, the second resistor, the ninth resistor and the tenth resistor are connected with the non-inverting input end of the first operational amplifier, the thirteenth resistor is connected with the fifteenth resistor in series, the fourteenth resistor is connected with the third capacitor in series, the light emitting diode, the second capacitor, the third capacitor and the fifteenth resistor are connected in parallel, the thirteenth resistor, the fourteenth resistor, the fifteenth resistor, the second capacitor and the third capacitor are connected with a seventh pin of the microprocessor, and the light emitting diode is connected with a sixth pin of the microprocessor.
Preferably, the MOS tube is an N-channel MOS tube.
Preferably, the microprocessor is of the type HT66F 007.
Preferably, the other end of the eleventh resistor and one end of the first capacitor are both grounded, the first capacitor is a filter capacitor, and the eleventh resistor is a current sampling resistor.
Preferably, one end of the sixth resistor is grounded.
The utility model discloses an actively advance the effect and lie in: the utility model is used for lithium battery charger judges battery voltage to according to the different control signal of battery voltage output. The utility model discloses realize charger real-time detection battery voltage, according to battery voltage's different situation, the charger makes different responses, like different states such as heavy current charging, undercurrent charging, protection to reach functions such as intelligent security charges, protection battery, facilitate the use.
Drawings
Fig. 1 is a circuit diagram of the present invention for determining the battery voltage and outputting different control signal loops.
Detailed Description
The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.
As shown in fig. 1, the circuit for determining battery voltage and outputting different control signals of the present invention includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R7, a ninth resistor R7, a tenth resistor R7, an eleventh resistor R7, a twelfth resistor R7, a thirteenth resistor R7, a fourteenth resistor R7, a fifteenth resistor R7, a sixteenth resistor R7, a transformer T, a first capacitor C7, a second capacitor C7, a third capacitor C7, a light emitting diode Z7, a microprocessor MCU, a MOS transistor Q, a diode D7, a first operational amplifier U1 7, a second operational amplifier U1 7, a connector H7, a first resistor R7, a second resistor R7, a ninth resistor R7, a ninth resistor R72, a ninth resistor R7 and a tenth resistor R7 connected in parallel with a ninth terminal, one end of a light emitting diode Z1, one end of a second capacitor C2, one end of a third capacitor C3 and a fifteenth resistor R15 are connected with the other end of a tenth resistor R10, one end of a third resistor R3 is connected with the output end of a second operational amplifier U1B, the other end of the third resistor R3 and one end of a twelfth resistor R12 are connected with the grid electrode of the MOS tube Q, one end of an eleventh resistor R11 is connected with the source electrode of the MOS tube Q, one interface of a joint H1 is connected with the drain electrode of the MOS tube Q, the other end of an eleventh resistor R11 is connected with one end of a first capacitor C1, the other end of the first capacitor C1 and one end of a diode D1 are connected with the other interface of the joint H1, the other end of the eleventh resistor R11, one end of the first capacitor C1 and the other end of a diode D1 are connected with a transformer T, a fourth resistor R5 is connected with the inverting input end of the second operational amplifier U1B, and an inverting resistor R5 is connected with the input, A sixth resistor R6 is connected to a positive input terminal of the second operational amplifier U1B, a fifth resistor R5 is connected to a sixth resistor R6 in series, a seventh resistor R7 is connected to one end of a light emitting diode in the optical coupler U, one end of a sixteenth resistor R16 is connected to the other end of the light emitting diode in the optical coupler U, the other end of a sixteenth resistor R16 is connected to an output terminal of the first operational amplifier U1A, an eighth resistor R8 is connected to an inverting input terminal of the first operational amplifier U1A, a first resistor R1, a second resistor R2, a ninth resistor R9, and a tenth resistor R10 are connected to a positive input terminal of the first operational amplifier U1A, a thirteenth resistor R13 is connected to a fifteenth resistor R15 in series, a fourteenth resistor R14 is connected to a third capacitor C3 in series, a light emitting diode Z1, a second capacitor C2, a third capacitor C3, a fifteenth resistor R15 and a fourth resistor R68658, a fourteenth resistor R13 and a fourteenth resistor R14 are connected to each other in parallel, And the fifteenth resistor R15, the second capacitor C2 and the third capacitor C3 are all connected with the seventh pin of the microprocessor MCU, and the light-emitting diode Z1 is connected with the sixth pin of the microprocessor MCU.
The MOS tube is an N-channel MOS tube, so that the required voltage requirement is met, and the power consumption is reduced.
The type of the microprocessor MCU can be HT66F007, so that the structure is simple and the cost is low.
The other end of the eleventh resistor R11 and one end of the first capacitor C1 are both grounded, the first capacitor is a filter capacitor, the eleventh resistor is a current sampling resistor, the first capacitor is grounded to stabilize the output voltage, the output current flows to the ground through the eleventh resistor, a voltage drop is generated on the eleventh resistor, and the microprocessor MCU determines the current according to the voltage drop on the eleventh resistor.
One end of the sixth resistor R6 is grounded, and the sixth resistor is grounded to divide the voltage with the fifth resistor, so that the second operational amplifier has a fixed voltage reference.
The utility model discloses a set up fifth resistance R5, sixth resistance R6, eighth resistance R8, MOS pipe Q's operating condition can be controlled to tenth resistance R10's resistance, in the twinkling of an eye when the battery inserts lithium battery charger, MOS pipe Q works in the amplification zone, this moment because B + (the positive pole of battery) voltage is lithium battery charger's maximum voltage, B- (the negative pole of battery) voltage is the variable, consequently can judge the voltage of battery according to the voltage difference between B + and B-, if battery voltage is less than the not chargeable voltage of regulation, microprocessor MCU's third pin output low level signal this moment, MOS pipe Q closes, cut off the charging circuit, MCU's sixth pin output high low level signal switches simultaneously, emitting diode Z1 scintillation suggests this battery voltage too low to charge, realize protect function; when the battery voltage is greater than the chargeable voltage, a third pin of the microprocessor MCU outputs a high level signal, the MOS tube Q is in saturated conduction at the moment, the battery voltage is equal to the B + voltage, a sixth pin of the MCU outputs a high level signal, and the light-emitting diode Z1 lights; the voltage of the battery can be judged according to the B + voltage, when the microprocessor MCU detects that the battery voltage is a specified low-current charging voltage, a first pin of the microprocessor MCU outputs a high-level signal, and low-current charging is started through the feedback action of the optocoupler U; in-process battery voltage who charges risees gradually, when microprocessor MCU detects voltage and reaches can the heavy current charging voltage often, microprocessor MCU's second pin output high level signal, the feedback effect charger through opto-coupler U begins the heavy current and charges to realized exporting the effect of different control signal (being level signal) according to the different voltage of battery, the charger makes different responses promptly, like heavy current charging, the low current charges, different states such as protection, in order to reach intelligent security and charge, functions such as protection battery. The first resistor R1, the second resistor R2, the ninth resistor R9 and the tenth resistor R10 are used for voltage division, the size of the first resistor R1 is set through the action of the operational amplifier U1A and the optical coupler U, and the size of a loop circuit can be changed; the third resistor R3 is used for limiting current and dividing voltage; the fourth resistor R4 is used for limiting current; the seventh resistor R7 is used for limiting current; the eleventh resistor R11 is used for current sampling; the twelfth resistor R12 is used for limiting current and dividing voltage; the thirteenth resistor R13 and the fifteenth resistor R15 divide the voltage to adopt the voltage of the positive terminal of the battery; the fourteenth resistor R14 and the fifteenth resistor R15 divide the voltage to adopt the voltage of the negative terminal of the battery; the fifteenth resistor R15 is used for voltage division; the sixteenth resistor R16 is used for limiting current; the transformer T is used for voltage conversion; the first capacitor C1 is used for storing energy and filtering; the second capacitor C2 is used for filtering; the third capacitor C3 is used for filtering; the diode D1 is used for rectification; the first operational amplifier U1A controls the magnitude of the current; the second operational amplifier U1B controls the working state of the MOS transistor Q; the connector H1 is used to connect to an external load.
The above-mentioned embodiments further explain the technical problems, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A loop for judging battery voltage and outputting different control signals is characterized by comprising a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a transformer, a first capacitor, a second capacitor, a third capacitor, a light-emitting diode, a microprocessor, an MOS (metal oxide semiconductor) tube, a diode, an optical coupler, a first operational amplifier, a second operational amplifier and a joint, wherein the first resistor, the second resistor and the ninth resistor are connected in parallel, one end of the first resistor, one end of the second resistor and one end of the ninth resistor are connected with one end of the tenth resistor, one end of the light-emitting diode, one end of the second capacitor and one end of the third capacitor, A fifteenth resistor is connected with the other end of a tenth resistor, one end of a third resistor is connected with the output end of the second operational amplifier, the other end of the third resistor and one end of a twelfth resistor are connected with the grid electrode of the MOS tube, one end of an eleventh resistor is connected with the source electrode of the MOS tube, one interface of a joint is connected with the drain electrode of the MOS tube, the other end of the eleventh resistor is connected with one end of a first capacitor, the other end of the first capacitor and one end of a diode are connected with the other interface of the joint, the other end of the eleventh resistor, one end of the first capacitor and the other end of the diode are connected with a transformer, a fourth resistor is connected with the inverting input end of the second operational amplifier, a fifth resistor and a sixth resistor are connected with the inverting input end of the second operational amplifier, a fifth resistor is connected with the sixth resistor in series, a seventh resistor is connected with one end of a light emitting diode in the optical coupler, one end of a sixteenth resistor is connected with the other end of a light emitting diode in the optical coupler, the other end of the sixteenth resistor is connected with the output end of the first operational amplifier, an eighth resistor is connected with the inverting input end of the first operational amplifier, the first resistor, the second resistor, the ninth resistor and the tenth resistor are connected with the non-inverting input end of the first operational amplifier, the thirteenth resistor is connected with the fifteenth resistor in series, the fourteenth resistor is connected with the third capacitor in series, the light emitting diode, the second capacitor, the third capacitor and the fifteenth resistor are connected in parallel, the thirteenth resistor, the fourteenth resistor, the fifteenth resistor, the second capacitor and the third capacitor are connected with a seventh pin of the microprocessor, and the light emitting diode is connected with a sixth pin of the microprocessor.
2. The circuit for determining battery voltage and outputting different control signals according to claim 1, wherein said MOS transistors are N-channel MOS transistors.
3. The circuit for determining battery voltage and outputting different control signals according to claim 1, wherein said microprocessor is of the type HT66F 007.
4. The circuit for determining battery voltage and outputting different control signals according to claim 1, wherein the other end of the eleventh resistor and one end of the first capacitor are both grounded, the first capacitor is a filter capacitor, and the eleventh resistor is a current sampling resistor.
5. The circuit for determining battery voltage and outputting different control signals according to claim 1, wherein one end of said sixth resistor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921919968.9U CN211453875U (en) | 2019-11-08 | 2019-11-08 | Circuit for judging battery voltage and outputting different control signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921919968.9U CN211453875U (en) | 2019-11-08 | 2019-11-08 | Circuit for judging battery voltage and outputting different control signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211453875U true CN211453875U (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921919968.9U Active CN211453875U (en) | 2019-11-08 | 2019-11-08 | Circuit for judging battery voltage and outputting different control signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211453875U (en) |
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2019
- 2019-11-08 CN CN201921919968.9U patent/CN211453875U/en active Active
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