CN213093886U - Lithium battery control circuit - Google Patents
Lithium battery control circuit Download PDFInfo
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- CN213093886U CN213093886U CN202020769149.7U CN202020769149U CN213093886U CN 213093886 U CN213093886 U CN 213093886U CN 202020769149 U CN202020769149 U CN 202020769149U CN 213093886 U CN213093886 U CN 213093886U
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Abstract
The utility model discloses a lithium battery control circuit, which comprises a voltage stabilizing circuit, a charging circuit and a lithium battery, wherein the voltage stabilizing circuit is electrically connected with the lithium battery through the charging circuit; the voltage stabilizing circuit comprises a three-terminal voltage stabilizer, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first diode, a second diode and a third diode; the charging circuit comprises an integrated circuit, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a first light emitting diode and a second light emitting diode, the model of the integrated circuit is MH4057, output power can be improved through a voltage stabilizing circuit in the lithium battery control circuit, charging speed is improved, moreover, the integrated circuit has trickle and soft start functions in the charging circuit, the functions of limiting surge and trickle charging are achieved, and the practicability of the control circuit is further improved.
Description
Technical Field
The utility model relates to a lithium cell field, concretely relates to lithium cell control circuit.
Background
In the existing lithium battery charging circuit, when the integrated circuit for charging the lithium battery is supplied with power, the charging current is too small, so that the charging is too slow; moreover, the integrated circuit for charging the lithium battery has no trickle function, and is easy to generate a surge phenomenon, so that the reliability of charging the lithium battery is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome foretell not enough, provide a lithium cell control circuit.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a lithium battery control circuit comprises a voltage stabilizing circuit, a charging circuit and a lithium battery, wherein the voltage stabilizing circuit is electrically connected with the lithium battery through the charging circuit;
the voltage stabilizing circuit comprises a three-terminal voltage stabilizer, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first diode, a second diode and a third diode, wherein the input end of the three-terminal voltage stabilizer is grounded through the first capacitor and the second capacitor, the grounding end of the three-terminal voltage stabilizer is grounded, the output end of the three-terminal voltage stabilizer is grounded through the third capacitor and the fourth capacitor respectively, the output end of the three-terminal voltage stabilizer is connected with a charging circuit through a positive series circuit consisting of the first diode, the second diode and the third diode, the output end of the three-terminal voltage stabilizer is connected with the anode of the first diode, and the cathode of the third diode is grounded through the fifth capacitor;
the voltage stabilizing circuit further comprises a current expansion circuit, the current expansion circuit comprises a fourth diode, a fifth diode, a sixth diode and a button switch, the input end of the three-terminal voltage stabilizer is electrically connected with one end of the button switch through a positive series circuit formed by the fourth diode, the fifth diode and the sixth diode, and the other end of the button switch is connected with the charging circuit;
the charging circuit comprises an integrated circuit, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a first light emitting diode and a second light emitting diode, the model of the integrated circuit is MH4057, the fourth end of the integrated circuit is connected with the cathode of the third diode and the button switch, the fourth end of the integrated circuit is grounded through the sixth capacitor, and the fourth end of the integrated circuit is respectively connected with the anode of the first light-emitting diode and the anode of the second light-emitting diode through the first resistor, the cathode of the first light-emitting diode is connected with the fifth end of the integrated circuit, the cathode of the second light-emitting diode is connected with the first end of the integrated circuit, the second end of the integrated circuit is grounded, the sixth end of the integrated circuit is grounded through the second resistor, the third end of the integrated circuit is grounded through the seventh capacitor, the third end of the integrated circuit is connected with the anode of the lithium battery, and the cathode of the lithium battery is grounded.
In the control circuit of the lithium battery, the lithium battery is provided with a lithium battery,
in the voltage stabilizing circuit, the model of the three-terminal regulator is 78M05, an external power supply is about 9-15V, then energy storage and voltage limitation are carried out through a first capacitor, filtering processing is carried out through a second capacitor, voltage stabilization is carried out through the three-terminal regulator, 5V direct current voltage is output, filtering is carried out through a third capacitor, energy storage and voltage stabilization are carried out through a fourth capacitor, and meanwhile, voltage reduction and voltage limitation are carried out on output voltage through a positive series circuit consisting of a first diode, a second diode and a third diode, the output voltage is limited to about 3.3V, and the output of the voltage stabilizing circuit can be realized;
the voltage stabilizing circuit is additionally provided with a current amplifying circuit, a voltage limiting circuit is formed by a fourth diode, a fifth diode and a sixth diode, meanwhile, the on-off of the current amplifying circuit can be controlled by a button switch, the output current of the voltage stabilizing circuit is increased, and the output power is further improved;
in the charging circuit, the output voltage of the voltage stabilizing circuit supplies power to the integrated circuit, and the third end of the integrated circuit is used for charging the lithium battery; the integrated circuit has a model MH4057, has a 2.9V trickle charge function, and is self-provided with soft start, so that the surge current is limited.
Preferably, the capacitance values of the second capacitor and the third capacitor are 0.1uF, the capacitance values of the first capacitor and the fourth capacitor are 100uF, and the capacitance value of the fifth capacitor is 100 uF.
Preferably, the three-terminal regulator is 78M05 in model number and packaged TO-252; and the occupied volume can be reduced by adopting patch packaging.
Preferably, the first diode, the second diode and the third diode are packaged in a DO-214 AC.
The utility model has the advantages that: in the lithium battery control circuit, the output power can be improved through the voltage stabilizing circuit, the charging speed is improved, and the integrated circuit in the charging circuit has the trickle and soft start functions, so that the functions of limiting surge and trickle charging are realized, and the practicability of the control circuit is further improved.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic circuit diagram of the present invention.
In the figure: A. the voltage stabilizing circuit comprises a voltage stabilizing circuit, a charging circuit, a BT1 lithium battery, a U1 three-terminal regulator, a U2 integrated circuit, a C1 first capacitor, a C2 second capacitor, a C3 third capacitor, a C4 fourth capacitor, a C5 fifth capacitor, a C6 sixth capacitor, a C7 seventh capacitor, a VD1 first diode, a VD2 second diode, a VD3 third diode, a VD4 fourth diode, a VD5 fifth diode, a VD6 sixth diode, a S1 button switch, a R1 first resistor, a R2 second resistor, an LED1 first light emitting diode, an LED2 second light emitting diode.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, the lithium battery control circuit comprises a voltage stabilizing circuit a, a charging circuit B and a lithium battery BT1, wherein the voltage stabilizing circuit a is electrically connected with the lithium battery BT1 through the charging circuit B;
the voltage stabilizing circuit A comprises a three-terminal regulator U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first diode VD1, a second diode VD2 and a third diode VD3, wherein the input end of the three-terminal regulator U1 is grounded through the first capacitor C1 and the second capacitor C2, the ground end of the three-terminal regulator U1 is grounded, the output end of the three-terminal regulator U1 is grounded through the third capacitor C3 and the fourth capacitor C4 respectively, the output end of the three-terminal regulator U1 is connected with the charging circuit A through a positive series circuit formed by the first diode VD1, the second diode VD2 and the third diode VD3, the output end of the three-terminal regulator U1 is connected with the anode of the first diode VD1, and the cathode of the third diode VD3 is grounded through the fifth capacitor C5;
the voltage stabilizing circuit A further comprises a current expanding circuit, the current expanding circuit comprises a fourth diode VD4, a fifth diode VD5, a sixth diode VD6 and a button switch S1, the input end of the three-terminal voltage stabilizer U1 is electrically connected with one end of the button switch S1 through a positive series circuit formed by the fourth diode VD4, the fifth diode VD5 and the sixth diode VD6, and the other end of the button switch S1 is connected with the charging circuit B;
the charging circuit B comprises an integrated circuit U2, a sixth capacitor C6, a seventh capacitor C7, a first resistor R1, a second resistor R2, a first light-emitting diode LED1 and a second light-emitting diode LED2, the model of the integrated circuit U2 is MH4057, the fourth end of the integrated circuit U2 is connected with the cathode of a third diode VD3 and a push-button switch S1, the fourth end of the integrated circuit U2 is grounded through the sixth capacitor C6, the fourth end of the integrated circuit U2 is respectively connected with the anode of the first light-emitting diode LED1 and the anode of the second light-emitting diode LED2 through the first resistor R1, the cathode of the first light-emitting diode LED1 is connected with the fifth end of the integrated circuit U2, the cathode of the second light-emitting diode LED2 is connected with the first end of the integrated circuit U2, the second end of the integrated circuit U2 is grounded, the sixth end of the integrated circuit U2 is grounded through the second resistor R2, and the third end of the integrated circuit U7 is grounded through the third capacitor C2, and the third end of the integrated circuit U2 is connected with the anode of the lithium battery BT1, and the cathode of the lithium battery BT1 is grounded.
Preferably, the capacitance values of the second capacitor C2 and the third capacitor C3 are 0.1uF, the capacitance values of the first capacitor C1 and the fourth capacitor C4 are 100uF, and the capacitance value of the fifth capacitor C5 is 100 uF.
Preferably, the three-terminal regulator U1 is 78M05 packaged as TO-252.
Preferably, the first diode VD1, the second diode VD2 and the third diode VD3 are all packaged in DO-214 AC.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A lithium battery control circuit is characterized in that: the lithium battery charging circuit comprises a voltage stabilizing circuit, a charging circuit and a lithium battery, wherein the voltage stabilizing circuit is electrically connected with the lithium battery through the charging circuit;
the voltage stabilizing circuit comprises a three-terminal voltage stabilizer, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first diode, a second diode and a third diode, wherein the input end of the three-terminal voltage stabilizer is grounded through the first capacitor and the second capacitor, the grounding end of the three-terminal voltage stabilizer is grounded, the output end of the three-terminal voltage stabilizer is grounded through the third capacitor and the fourth capacitor respectively, the output end of the three-terminal voltage stabilizer is connected with a charging circuit through a positive series circuit consisting of the first diode, the second diode and the third diode, the output end of the three-terminal voltage stabilizer is connected with the anode of the first diode, and the cathode of the third diode is grounded through the fifth capacitor;
the voltage stabilizing circuit further comprises a current expansion circuit, the current expansion circuit comprises a fourth diode, a fifth diode, a sixth diode and a button switch, the input end of the three-terminal voltage stabilizer is electrically connected with one end of the button switch through a positive series circuit formed by the fourth diode, the fifth diode and the sixth diode, and the other end of the button switch is connected with the charging circuit;
the charging circuit comprises an integrated circuit, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a first light emitting diode and a second light emitting diode, the model of the integrated circuit is MH4057, the fourth end of the integrated circuit is connected with the cathode of the third diode and the button switch, the fourth end of the integrated circuit is grounded through the sixth capacitor, and the fourth end of the integrated circuit is respectively connected with the anode of the first light-emitting diode and the anode of the second light-emitting diode through the first resistor, the cathode of the first light-emitting diode is connected with the fifth end of the integrated circuit, the cathode of the second light-emitting diode is connected with the first end of the integrated circuit, the second end of the integrated circuit is grounded, the sixth end of the integrated circuit is grounded through the second resistor, the third end of the integrated circuit is grounded through the seventh capacitor, the third end of the integrated circuit is connected with the anode of the lithium battery, and the cathode of the lithium battery is grounded.
2. The lithium battery control circuit of claim 1, wherein: the capacitance values of the second capacitor and the third capacitor are 0.1uF, the capacitance values of the first capacitor and the fourth capacitor are 100uF, and the capacitance value of the fifth capacitor is 100 uF.
3. The lithium battery control circuit of claim 1, wherein: the model of the three-terminal regulator is 78M05, and the package is TO-252.
4. The lithium battery control circuit of claim 1, wherein: and the first diode, the second diode and the third diode are packaged into DO-214 AC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020769149.7U CN213093886U (en) | 2020-05-12 | 2020-05-12 | Lithium battery control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020769149.7U CN213093886U (en) | 2020-05-12 | 2020-05-12 | Lithium battery control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213093886U true CN213093886U (en) | 2021-04-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020769149.7U Active CN213093886U (en) | 2020-05-12 | 2020-05-12 | Lithium battery control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213093886U (en) |
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2020
- 2020-05-12 CN CN202020769149.7U patent/CN213093886U/en active Active
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