CN215817582U - Lead storage battery charging circuit with temperature compensation function - Google Patents
Lead storage battery charging circuit with temperature compensation function Download PDFInfo
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- CN215817582U CN215817582U CN202121715458.7U CN202121715458U CN215817582U CN 215817582 U CN215817582 U CN 215817582U CN 202121715458 U CN202121715458 U CN 202121715458U CN 215817582 U CN215817582 U CN 215817582U
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Abstract
The utility model discloses a lead storage battery charging circuit with a temperature compensation function, which comprises a power supply input end and a temperature compensation circuit for detecting the ambient temperature, wherein the power supply input end is sequentially connected with a voltage control circuit for regulating and outputting charging voltage according to a detection signal of the temperature compensation circuit, and an overcurrent protection circuit which is connected with a lead storage battery and is used for monitoring the charging voltage output by the voltage control circuit to realize overcurrent protection, the feedback resistance of the temperature compensation circuit can be adjusted according to the actual temperature of the lead storage battery, and the charging voltage is adjusted by the voltage control circuit, so that the charging voltage is more in line with the ideal temperature characteristic of the battery, and the aims of ensuring the effective capacity and the effective service life of the battery are fulfilled.
Description
[ technical field ]
The utility model relates to a lead storage battery charging circuit with a temperature compensation function.
[ background art ]
Batteries are required in many situations to provide backup power, and lead storage batteries are certainly preferred for cost and safety considerations. However, the relevant parameters of lead storage batteries are defined at a standard ambient temperature of 25 ℃. In fact, as the temperature increases, the electrochemical activity thereof increases, and the charging voltage thereof should become lower, otherwise the corrosion is increased and the battery life is impaired due to the increase of the polar plate activity thereof caused by an excessively high charging voltage. When the temperature is lowered, the activity of the electrolyte is lowered, and the voltage must be increased moderately, otherwise the actual use is affected due to the insufficient charge capacity.
The temperature characteristic of the battery is neglected by a common charging circuit, so that the service life of the lead storage battery is shortened due to overcharge at high temperature, and the battery cannot be fully charged due to insufficient charge at low temperature, even the basic standby power requirement cannot be met.
[ contents of utility model ]
The utility model overcomes the defects of the technology and provides a lead storage battery charging circuit with a temperature compensation function.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a lead accumulator charging circuit with temperature compensation function which characterized in that: including power input end and the temperature compensation circuit who is used for detecting ambient temperature, power input end is connected with the voltage control circuit who exports charging voltage according to temperature compensation circuit's detected signal regulation in order, be connected with lead accumulator and be used for monitoring the charging voltage that voltage control circuit exported and realize overcurrent protection's overcurrent protection circuit, temperature compensation circuit is including temperature sensitive resistor RT1, temperature sensitive resistor RT1 one end respectively with voltage control circuit, resistance R3 one end, lead accumulator connects, the temperature sensitive resistor RT1 other end respectively with the resistance R3 other end, resistance R5 one end is connected, the resistance R3 other end and voltage control circuit, electric capacity C3 one end, resistance R10 one end is connected, the electric capacity C3 other end, resistance R10 other end ground connection.
The lead storage battery charging circuit with the temperature compensation function is characterized in that: the voltage control circuit is connected with an input end external control circuit, and the overcurrent protection circuit is connected with an output end external control circuit.
The lead storage battery charging circuit with the temperature compensation function is characterized in that: the overcurrent protection circuit comprises a current detection chip U2, a pin I of a U2 of the current detection chip is respectively connected with the positive end of a diode D1 and one end of a resistor R1, a pin II of the current detection chip U2 is respectively connected with the other end of a resistor R1, one end of a resistor R4 and a temperature compensation circuit, a pin III of a U2 of the current detection chip is respectively connected with a base of a triode Q2 and one end of a resistor R9 through the resistor R7, the other end of the resistor R9 is grounded, a collector of the triode Q2 is connected with the other end of the resistor R4, and an emitter of the triode Q2 is connected with a voltage control circuit.
The lead storage battery charging circuit with the temperature compensation function is characterized in that: the voltage control circuit comprises a voltage reduction chip U1, a pin (R) of a voltage reduction chip U1 is respectively connected with one end of a resistor R2, one end of a capacitor C1, the positive end of an electrolytic capacitor EC1 and a power supply input end, a pin (C) of a voltage reduction chip U1 is connected with the other end of a resistor R2, a pin (C) of a voltage reduction chip U1, the other end of a capacitor C1 and the negative end of an electrolytic capacitor EC1 are respectively grounded, a pin (R) of the voltage reduction chip U1 is respectively connected with the negative end of a diode D2 and one end of an inductor L1, the other end of the inductor L1 is respectively connected with one end of a capacitor C2, the positive end of an electrolytic capacitor EC2 and a temperature compensation circuit, the positive end of a diode D2, the other end of a capacitor C2 and the negative end of an electrolytic capacitor EC2 are respectively grounded, and a pin (R) of a voltage reduction chip U1 is connected with a protection overcurrent circuit.
The utility model has the beneficial effects that:
the utility model is provided with the temperature compensation circuit, can adjust the feedback resistance of the temperature compensation circuit according to the actual temperature of the lead storage battery, and then adjusts the charging voltage through the voltage control circuit, thereby leading the charging voltage to be more in line with the ideal temperature characteristic of the battery and achieving the purposes of ensuring the effective capacity and the effective service life of the battery.
[ description of the drawings ]
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a circuit diagram of the present invention.
[ detailed description of the utility model ]
The following is a more detailed description of embodiments of the utility model, taken in conjunction with the accompanying drawings of which:
as shown in fig. 1-2, a lead storage battery charging circuit with temperature compensation function comprises a power input terminal 1 and a temperature compensation circuit 3 for detecting an ambient temperature, wherein the power input terminal 1 is sequentially connected with a voltage control circuit 4 for adjusting an output charging voltage according to a detection signal of the temperature compensation circuit 3, and an overcurrent protection circuit 2 connected with the lead storage battery for monitoring the charging voltage output by the voltage control circuit 4 to realize overcurrent protection. During charging, the temperature compensation circuit 3 detects the temperature of the lead storage battery, and adjusts the feedback resistance value in the temperature compensation circuit 3 according to the detected temperature, so as to adjust the output charging voltage of the voltage control circuit 4, thereby enabling the charging voltage to better accord with the ideal temperature characteristic of the battery, meanwhile, the over-current protection circuit 2 detects the charging voltage output by the voltage control circuit 4, and when the charging voltage is too large, the charging connection of the lead storage battery is disconnected to realize the over-current protection effect.
As shown in fig. 1 to 2, the voltage control circuit 4 is connected to an input-side external control circuit 5, and the overcurrent protection circuit 2 is connected to an output-side external control circuit 6, and the charging voltage is adjusted by inputting a control command from the outside.
As shown in fig. 2, the temperature compensation circuit 3 includes a temperature-sensitive resistor RT1, one end of the temperature-sensitive resistor RT1 is connected to the voltage control circuit 4, one end of the resistor R3, and the lead-acid battery, the other end of the temperature-sensitive resistor RT1 is connected to the other end of the resistor R3 and one end of the resistor R5, the other end of the resistor R3 is connected to the voltage control circuit 4, one end of the capacitor C3 is connected to one end of the resistor R10, and the other end of the capacitor C3 and the other end of the resistor R10 are grounded. The temperature sensitive resistor RT1 detects the temperature of the lead storage battery, the resistance value of the temperature sensitive resistor RT1 changes along with the temperature change of the lead storage battery, and then the feedback resistor R10 feeds the resistance value change of the temperature sensitive resistor RT1 back to the voltage control circuit 4 to adjust the output charging voltage.
As shown in fig. 2, the overcurrent protection circuit 2 includes a current detection chip U2, a pin (i) of the current detection chip U2 is connected to an anode of a diode D1 and one end of a resistor R1, a pin (ii) of the current detection chip U2 is connected to the other end of a resistor R1, one end of a resistor R4 and the temperature compensation circuit 3, a pin (iii) of the current detection chip U2 is connected to a base of a transistor Q2 and one end of the resistor R9 through a resistor R7, the other end of the resistor R9 is grounded, a collector of the transistor Q2 is connected to the other end of the resistor R4, and an emitter of the transistor Q2 is connected to the voltage control circuit 4.
As shown in fig. 2, the voltage control circuit 4 includes a voltage-reducing chip U1, a pin (R) of a voltage-reducing chip U1 is connected to one end of a resistor R2, one end of a capacitor C1, an anode end of an electrolytic capacitor EC1, and a power input terminal 1, a pin (C) of a voltage-reducing chip U1 is connected to the other end of a resistor R2, a pin (C) of a voltage-reducing chip U1, the other end of a capacitor C1, and a cathode end of an electrolytic capacitor EC1 are grounded, a pin (C) of a voltage-reducing chip U1 is connected to a cathode end of a diode D2 and one end of an inductor L1, the other end of the inductor L1 is connected to one end of a capacitor C2, an anode end of an electrolytic capacitor EC2, and a temperature compensation circuit 3, a pin (C) of a diode D2, the other end of a capacitor C2, and a cathode end of an electrolytic capacitor EC2 are grounded, and a pin (b) of a voltage-reducing chip U1 is connected to the overcurrent protection circuit 2.
The model of the buck chip U1 is LM2576, the output voltage of the voltage control circuit 4 is determined by the feedback circuit of the temperature compensation circuit, that is, Vout ═ Vfb (R10+ R5+ R3// RT1)/R10, and when the temperature rises, the temperature sensitive resistor RT1 decreases, and Vout decreases accordingly. Temperature compensation for different batteries can be realized by changing the resistance network.
Claims (4)
1. The utility model provides a lead accumulator charging circuit with temperature compensation function which characterized in that: including power input end (1) and temperature compensation circuit (3) that are used for detecting ambient temperature, power input end (1) is connected in order and is used for monitoring voltage control circuit (4) output's voltage control circuit (4) according to the detected signal regulation output charging voltage of temperature compensation circuit (3), be connected with lead accumulator and be used for monitoring voltage control circuit (4) output's charging voltage to realize overcurrent protection's overcurrent protection circuit (2), temperature compensation circuit (3) are including temperature sensitive resistor RT1, temperature sensitive resistor RT1 one end respectively with voltage control circuit (4), resistance R3 one end, lead accumulator is connected, the temperature sensitive resistor RT1 other end respectively with the resistance R3 other end, resistance R5 one end is connected, the resistance R3 other end and voltage control circuit (4), capacitance C3 one end, resistance R10 one end is connected, the capacitance C3 other end, resistance R10 other end ground connection.
2. A lead-acid battery charging circuit with temperature compensation function according to claim 1, characterized in that: the voltage control circuit (4) is connected with an input end external control circuit (5), and the overcurrent protection circuit (2) is connected with an output end external control circuit (6).
3. A lead-acid battery charging circuit with temperature compensation function according to claim 1, characterized in that: the overcurrent protection circuit (2) comprises a current detection chip U2, a pin I of a current detection chip U2 is respectively connected with the positive end of a diode D1 and one end of a resistor R1, a pin II of the current detection chip U2 is respectively connected with the other end of a resistor R1, one end of a resistor R4 and a temperature compensation circuit (3), a pin III of the current detection chip U2 is respectively connected with the base of a triode Q2 and one end of the resistor R9 through the resistor R7, the other end of the resistor R9 is grounded, the collector of the triode Q2 is connected with the other end of the resistor R4, and the emitter of the triode Q2 is connected with a voltage control circuit (4).
4. A lead-acid battery charging circuit with temperature compensation function according to claim 1, characterized in that: the voltage control circuit (4) comprises a voltage reduction chip U1, a pin (R) of a voltage reduction chip U1 is respectively connected with one end of a resistor R2, one end of a capacitor C1, the positive end of an electrolytic capacitor EC1 and a power input end (1), a pin (C) of a voltage reduction chip U1 is connected with the other end of a resistor R2, a pin (C) of a voltage reduction chip U1, the other end of a capacitor C1 and the negative end of an electrolytic capacitor EC1 are respectively grounded, a pin (R) of a voltage reduction chip U1 is respectively connected with the negative end of a diode D2 and one end of an inductor L1, the other end of the inductor L1 is respectively connected with one end of a capacitor C2, the positive end of an electrolytic capacitor EC2 and a temperature compensation circuit (3), the positive end of a diode D2, the other end of a capacitor C2 and the negative end of an electrolytic capacitor EC2 are respectively grounded, and a pin (R) of a voltage reduction chip U1 is connected with an overcurrent protection circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121715458.7U CN215817582U (en) | 2021-07-27 | 2021-07-27 | Lead storage battery charging circuit with temperature compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121715458.7U CN215817582U (en) | 2021-07-27 | 2021-07-27 | Lead storage battery charging circuit with temperature compensation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215817582U true CN215817582U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121715458.7U Active CN215817582U (en) | 2021-07-27 | 2021-07-27 | Lead storage battery charging circuit with temperature compensation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215817582U (en) |
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2021
- 2021-07-27 CN CN202121715458.7U patent/CN215817582U/en active Active
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