CN212085849U - Double-control lock key station charging control circuit - Google Patents
Double-control lock key station charging control circuit Download PDFInfo
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- CN212085849U CN212085849U CN202020832826.5U CN202020832826U CN212085849U CN 212085849 U CN212085849 U CN 212085849U CN 202020832826 U CN202020832826 U CN 202020832826U CN 212085849 U CN212085849 U CN 212085849U
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Abstract
The application relates to a charging control circuit of a double-control lock key station, which comprises a double-control lock key charging module; the double-control lock key charging module comprises a battery charging management chip and a charging state indicator lamp; the BAT pin of the battery charging management chip is suitable for electrically connecting the positive pole of the lithium battery to be charged, and the grounding pin of the battery charging management chip is suitable for electrically connecting the negative pole of the lithium battery; the battery charging management chip has a drain open charging state output pin externally connected with a current limiting resistor, and the current limiting resistor and the charging state indicator lamp are connected in series between the drain open charging state output pin and the voltage input pin; the drain open-circuit charging state output pin is externally connected with a pull-up resistor, and the pull-up resistor is electrically connected between the drain open-circuit charging state output pin and the voltage input pin; the voltage input pin of the battery charging management chip is used for inputting driving voltage, and the grounding pin of the battery charging management chip is grounded. It can prevent overcharging to two accuse lock keys.
Description
Technical Field
The utility model relates to a two accuse lock key station application field especially relates to a two accuse lock key station charge control circuit.
Background
As the range of human activities has expanded, mobile handheld devices have gained popularity with more people. The double-control lock is not exceptional in the field of double-control locks. While powering the handheld device becomes a problem. To solve this problem, a lithium battery having a small volume and high energy is widely used.
Lithium batteries are also used in double lock keys. Because the energy density of the lithium battery is high, if the safety of the lithium battery is difficult to guarantee by direct charging, the overcharge of the lithium battery can occur.
Disclosure of Invention
In view of the above, the present disclosure provides a charging control circuit for a dual-lock key station, which can prevent the dual-lock key from being overcharged.
According to an aspect of the present disclosure, there is provided a charging control circuit for a key station of a dual lock, including a key charging module of the dual lock; the double-control lock key charging module comprises a battery charging management chip and a charging state indicator lamp;
the BAT pin of the battery charging management chip is suitable for being electrically connected with the positive electrode of the lithium battery to be charged, and the grounding pin of the battery charging management chip is suitable for being electrically connected with the negative electrode of the lithium battery;
the current-limiting resistor is externally connected with a drain open-circuit charging state output pin of the battery charging management chip, and the current-limiting resistor and the charging state indicator lamp are connected in series between the drain open-circuit charging state output pin and a voltage input pin;
the drain open-circuit charging state output pin is externally connected with a pull-up resistor, and the pull-up resistor is electrically connected between the drain open-circuit charging state output pin and the voltage input pin;
the voltage input pin of the battery charging management chip is used for inputting driving voltage, and the grounding pin of the battery charging management chip is grounded.
In one possible implementation manner, the battery charging management chip is further configured with a charging current programming pin;
and a first resistor is connected in series between the charging current programming pin and the grounding end.
In one possible implementation manner, a capacitor bank is connected in series between a voltage input pin of the battery charging management chip and a ground terminal;
the capacitor group comprises a first capacitor and a second capacitor which are connected in parallel;
a first diode is also connected in series between the voltage input pin and the capacitor bank;
the anode of the first diode is electrically connected with the capacitor bank, and the cathode of the first diode is electrically connected with the voltage input pin.
In a possible implementation manner, a second resistor is further connected in series between the voltage input pin of the battery charge management chip and the BAT pin;
and a third capacitor is connected in series between the BAT pin and the ground terminal.
In a possible implementation mode, the system further comprises a power module, a control module, an upper computer communication module, a double-control lock key communication module and an external socket;
the power module, the control module, the upper computer communication module, the double-control lock key communication module and the double-control lock key charging module are integrated on the electric control mainboard;
the input end of the power supply module is suitable for being electrically connected with a power supply and is used for supplying power to the control module, the upper computer communication module, the double-control lock key communication module and the double-control lock key charging module;
the communication port of the upper computer communication module is electrically connected with the upper computer communication port of the control module, and the control module is electrically connected with the external socket through the double-control lock key communication module.
In one possible implementation, the power supply module includes a voltage reduction module and a voltage regulator;
the voltage input end of the voltage reduction module is suitable for being electrically connected to the power supply, the voltage output end of the voltage reduction module is electrically connected with the voltage input end of the voltage stabilizer, and the grounding end of the voltage reduction module is grounded;
the voltage output end of the voltage stabilizer is electrically connected to the double-control lock key communication module and the upper computer communication module;
and the voltage output end of the voltage reduction module is electrically connected to the double-control lock key charging module.
In one possible implementation, the power supply module further includes a rectifier bridge, a transient suppression diode, and a fourth capacitor;
the voltage input positive pole and the voltage input negative pole of the rectifier bridge are suitable for being electrically connected with two poles of the power supply, the voltage output positive pole of the rectifier bridge is electrically connected with the voltage input end of the voltage reduction module, and the voltage output negative pole of the rectifier bridge is grounded;
the transient suppression diode is electrically connected between the voltage input anode of the rectifier bridge and the voltage input cathode of the rectifier bridge;
the fourth capacitor is connected in parallel with the transient suppression diode.
In a possible implementation manner, the power module further includes a third resistor, a light emitting diode, a fourth resistor, and a fifth capacitor;
the third resistor and the light emitting diode are connected in series and then electrically connected between the voltage output end of the voltage reduction module and a ground end;
wherein the cathode of the light emitting diode is grounded;
the fifth capacitor is connected in series between the voltage input end of the voltage reduction module and a ground end;
the fourth resistor is connected in series with the voltage output end of the voltage stabilizer;
a plurality of filter capacitors connected in parallel are electrically connected between the voltage output end of the voltage reduction module and the grounding end;
a plurality of filter capacitors connected in parallel are electrically connected between the voltage input end of the voltage stabilizer and the grounding end of the voltage stabilizer, and a filter capacitor is electrically connected between the voltage output end of the voltage stabilizer and the grounding end.
In one possible implementation, the key communication module includes a key communication chip;
the voltage input pin of the double-control lock key communication chip is electrically connected with the voltage output end of the power module, and the serial data pin of the double-control lock key communication chip are electrically connected to the double-control lock key communication port of the control module;
a Schottky diode is connected in series between a voltage input pin of the double-control lock key communication chip and a voltage output end of the power module;
and a signal input/output pin of the double-control lock key communication chip is electrically connected to the external socket.
In one possible implementation manner, the upper computer communication module comprises an upper computer communication chip;
the voltage input end of the upper computer communication chip is electrically connected with the voltage output end of the power supply module, and the T2I pin and the R2O pin of the upper computer communication chip are electrically connected with the upper computer communication port of the control module;
the T2O pin and the R2I pin of the upper computer communication chip are suitable for being electrically connected with an upper computer;
the control module is a microprocessor.
The first pin of the battery charging management chip
The end is a drain open circuit charging state output pin, the first pin is externally connected with a current limiting resistor, one end of the current limiting resistor, which is not electrically connected with the first pin of the battery charging management chip, is electrically connected to the cathode of a charging state indicator lamp, the charging state indicator lamp is a red diode charging indicator lamp, and the anode of the charging state indicator lamp is connected with a 5V power supply. When the double-control lock key charging module charges the double-control lock key,
the port is held low by a built-in NMOS. The charging state indicator lamp is turned on and is lightened. When charging is completed
And the high-resistance state is presented, and the charging state indicator lamp is turned off. On a battery charge management chip
The ports entering pull-up resistors not associated with the battery charge management chip
One end of the port connection is connected with a 5V power supply, so that the battery charging management chip can be completely extinguished under the state that the double-control lock key is fully charged. Therefore, the charging state at the moment can be judged by judging whether the battery charging management chip is lightened, and the double-control lock key is prevented from being overcharged.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
Fig. 1 shows an overall control block diagram of a double-lock key station charging control circuit of an embodiment of the present disclosure;
fig. 2 illustrates a circuit diagram of a double-lock charging module of a double-lock key station charging control circuit of an embodiment of the present disclosure;
FIG. 3 shows a power module circuit diagram for a dual-lock key station charge control circuit of an embodiment of the present disclosure;
fig. 4 shows a key communication module circuit diagram of the key station charging control circuit of the double-lock according to an embodiment of the present disclosure;
FIG. 5 is a circuit diagram of an upper computer communication module of a charging control circuit of a dual-control lock key station according to an embodiment of the present disclosure
Fig. 6 shows a control block diagram of a double-control lock key station charging control circuit according to an embodiment of the disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
Fig. 1 shows a schematic diagram of an overall circuit control module 120 of a charging control circuit of a double-control lock key station according to an embodiment of the present application. Fig. 2 shows a circuit diagram of an interlock lock key charging module of the interlock lock key station charging control circuit according to an embodiment of the present application. As shown in fig. 1 or fig. 2, the dual-control lock key charging module 140 is included, and the dual-control lock key charging module 140 includes a battery charging management chip U1 and a charging status indicator lamp D1. The BAT pin of the battery charging management chip U1 is suitable for being electrically connected with the positive electrode of the lithium battery to be charged, and the grounding pin of the battery charging management chip U1 is suitable for being electrically connected with the negative electrode of the lithium battery. The open-drain charging state output pin of the battery charging management chip U1 is externally connected with a current limiting resistor R1, and the current limiting resistor R1 and the charging state indicator lamp D1 are connected in series between the open-drain charging state output pin and the voltage input pin. The open-drain charging state output pin is externally connected with a pull-up resistor R2, and the pull-up resistor R2 is electrically connected between the open-drain charging state output pin and the voltage input pin. The voltage input pin of the battery charging management chip U1 is used for inputting a driving voltage, and the ground pin of the battery charging management chip U1 is grounded.
The battery charging management chip U1 in the double-control lock key station charging control circuit in the embodiment of the application can adopt a linear lithium battery charging management chip U1 with the model of LTC4054ES-4.2, and can also adopt LTC40XX series with the same pin definition.
The first pin of the battery charging management chip U1
The terminal is an open-drain charging state output pin, the first pin is externally connected with a current limiting resistor R1, and one end of the current limiting resistor R1, which is not electrically connected with the first pin of the battery charging management chip U1, is electrically connected to the charging state fingerThe cathode of the indicator light D1, the charging status indicator light D1 is a red diode charging indicator light, and the anode of the charging status indicator light D1 is connected to a 5V power supply. When the twin-lock key charging module 140 charges the twin-lock key,
the port is held low by a built-in NMOS. The charge status indicator lamp D1 is turned on, and the charge status indicator lamp D1 is turned on. When charging is completed
And a high impedance state is presented, and the charging state indicator lamp D1 is turned off. At the battery charge management chip U1
The port enters a pull-up resistor R2, and the pull-up resistor R2 is not connected with the battery charging management chip U1
One end of the port connection is connected with a 5V power supply, so that the battery charging management chip U1 can be completely turned off in the state that the double-control lock key is fully charged. Therefore, the charging state at this time can be judged by whether the battery charging management chip U1 is lighted or not, and overcharging of the twin lock key is prevented.
In one implementation, the battery charging management chip U1 is further configured with a charging current programming pin, and a first resistor R4 is connected in series between the charging current programming pin and a ground terminal.
In one possible implementation manner, a capacitor bank is connected in series between the voltage input pin of the battery charging management chip U1 and the ground terminal, and the capacitor bank includes a first capacitor C1 and a second capacitor C2 connected in parallel. A first diode D2 is also connected in series between the voltage input pin and the capacitor bank, the anode of the first diode D2 is electrically connected with the capacitor bank, and the cathode of the first diode D2 is electrically connected with the voltage input pin.
In a possible implementation manner, a second resistor R3 is also connected in series between the voltage input pin of the battery charging management chip U1 and the BAT pin, and a third capacitor C3 is connected in series between the BAT pin and the ground terminal.
Here, it should be noted that the second pin BAT of the battery charge management chip U1 is a ground pin, and the third pin BAT of the battery charge management chip U1 is a charging power supply output pin, and is connected to the positive electrode of the key battery. The third pin of the battery charging management chip U1 provides the charging voltage for the double-control lock key battery to be controlled at 4.2V, and the internal accurate resistance voltage divider is also led out from the third pin of the battery charging management chip U1 to control the output voltage. A third pin of the battery charge management chip U1 may be electrically connected to the control module 120 to monitor the charge condition of the key fob battery. The access of the third capacitor C3 can prevent the stroboscopic problem of the charging state indicator lamp D1 under the condition that the third pin of the battery charging management chip U1 is not accessed to the dual-control lock key battery, and effectively absorbs the wave frequency of the third pin of the battery charging management chip U1.
The fifth pin PROG of the battery charging management chip U1 is a charging current programming pin, which is a switch for detecting and charging a charging current, and the programmable current can reach five hundred milliamperes. The first resistor R4 connected in series between the fifth pin of the battery charging management chip U1 and the ground terminal can prevent the charging current from being overlarge, and the safe charging of the double-control lock key battery is ensured. The fourth pin VCC of battery charging management chip U1 is the chip pin that charges, between VCC and GND, parallelly connected first electric capacity C1 and second electric capacity C2, and adopts different capacitance values, for the interference waveform filtering of the high frequency or the low frequency that appear, guarantees to the stability of two accuse lock key battery charging.
During the charging process, if the voltage of the BAT pin of the battery charge management chip U1 is lower than 2.9V, the battery charge management chip U1 enters the trickle charge mode. In this mode, the BAT terminal charging current of the battery charging management chip U1 is 1/10 of the set value charging current value. In the embodiment of the application, a second resistor R3 is connected in series between BAT and VCC of the battery charging management chip U1, so that when the BAT pin of the battery charging management chip U1 is charged in a trickle mode, a branch current is superposed, and the total current reaches the starting current when the dual-control lock key works. When the voltage of the BAT pin is higher than 2.9V, the battery charging management chip U1 enters into constant current charging, the charging current is a set charging current value, and the lithium battery is normally charged. The first diode D2 is provided to prevent the esk battery from reverse charging the power module 110 through the second resistor R3.
In a possible implementation manner, the portable electronic device further includes a power module 110, a control module 120, an upper computer communication module 130, a dual-lock key communication module 150, and an external socket 200, wherein the power module 110, the control module 120, the upper computer communication module 130, the dual-lock key communication module 150, and the dual-lock key charging module 140 are integrated on the electronic control motherboard 100. The input terminal of the power module 110 is adapted to be electrically connected to a power supply for supplying power to the control module 120, the upper computer communication module 130, the key communication module 150 and the key charging module 140. The communication port of the upper computer communication module 130 is electrically connected with the upper computer communication port of the control module 120, and the control module 120 is electrically connected with the external socket 200 through the double-control lock key communication module 150.
As shown in fig. 1 or fig. 3, in one possible implementation, the power module 110 includes a voltage-reducing module U2 and a voltage regulator U3, a voltage input terminal of the voltage-reducing module U2 is adapted to be electrically connected to a power supply, a voltage output terminal of the voltage-reducing module U2 is electrically connected to a voltage input terminal of the voltage regulator U3, and a ground terminal of the voltage-reducing module U2 is grounded. The voltage output terminal of the voltage regulator U3 is electrically connected to the key communication module 150 and the upper computer communication module 130, wherein the voltage output terminal of the voltage reduction module U2 also supplies power to the key charging module 140.
Furthermore, in a possible implementation manner, the power module 110 further includes a rectifier bridge B1, a transient suppression diode D3, and a fourth capacitor C4, wherein a positive voltage input terminal and a negative voltage input terminal of the rectifier bridge B1 are adapted to be electrically connected to two poles of the power supply, a positive voltage output terminal of the rectifier bridge B1 is electrically connected to a voltage input terminal of the voltage dropping module U2, and a negative voltage output terminal of the rectifier bridge B1 is grounded. The transient suppression diode D3 is electrically connected between the positive voltage input terminal of the rectifier bridge B1 and the negative voltage input terminal of the rectifier bridge B1, and the fourth capacitor C4 is connected in parallel with the transient suppression diode D3.
Further, in a possible implementation manner, the power module 110 further includes a third resistor R5, a fourth resistor R6, and a light emitting diode D4, the third resistor R5 and the light emitting diode D4 are connected in series to the voltage output of the voltage dropping module U2, and the cathode of the light emitting diode D4 is grounded. A plurality of filter capacitors connected in parallel are electrically connected between the voltage output end and the grounding end of the voltage reduction module U2, a filter capacitor is connected in parallel between the voltage output end of the voltage reduction module U2 and the grounding end of the voltage stabilizer U3, and a filter capacitor is connected in parallel between the voltage output end of the voltage stabilizer U3 and the grounding end of the voltage stabilizer U3.
Here, it should be noted that the filter capacitor includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, and a twelfth capacitor C12. The input end of the fifth capacitor C5 is electrically connected with the voltage output of the rectifier bridge B1, and the output end of the fifth capacitor C5 is grounded. An input end of the sixth capacitor C6 is electrically connected to the voltage output end of the isolated power supply module 110, an output end of the sixth capacitor C6 is grounded, the seventh capacitor C7 is arranged in parallel with the sixth capacitor C6, and the eighth capacitor C8 and the sixth capacitor C6 are arranged in parallel. The ninth capacitor C9 is disposed in parallel with the voltage regulator U3, an input terminal of the ninth capacitor C9 is electrically connected to a voltage output terminal of the isolated power supply module 110, an output terminal of the ninth capacitor C9 is grounded, and the tenth capacitor C10 and the ninth capacitor C9 are disposed in parallel. An input end of an eleventh capacitor C11 is electrically connected with a voltage output end of the voltage stabilizer U3, an output end of the eleventh capacitor C11 is grounded, an input end of a twelfth capacitor C12 is electrically connected with an output end of the sixth resistor, and an output end of the twelfth capacitor C12 is grounded.
According to the double-control lock key station charging control circuit, the power supply module 110 is externally connected with a 12V power supply, and the transient suppression diode D3 is added at two ends of the 12V power supply, so that abnormal transient voltage on the power supply can be effectively suppressed, and the generated surge and static electricity are protected. The addition of a fourth capacitor C4 is more effective in absorbing the abnormal spike waveform generated by the power supply. The rectifier bridge B1 effectively plays a role in preventing reverse connection. 12V is reduced to 5V by an isolated power supply module 110. And then a forward low dropout regulator U3 can effectively reduce the power loss, and finally obtain 3.3V voltage. And the 5V power supply and the 3.3V power supply power for all chips needing power supply on the circuit board. In order to reduce the interference of the power supply and the power ground on the power supply of a subsequent control circuit, a large number of filter capacitors are added in the circuit, and various different capacitance values are selected to filter high-frequency noise waves and low-frequency noise waves. Thereby achieving an ideal waveform with ripple at 100 mV. The third resistor R5 and the fourth resistor R6 are current limiting resistors. The light emitting diode D4 is a 5V power indicator.
As shown in fig. 1 or fig. 4, in one possible implementation, the dck key communication module 150 includes a dck key communication chip, a voltage input pin of the dck key communication chip is electrically connected to a voltage output terminal of the power module 110, and a serial data pin of the dck key communication chip are electrically connected to a dck key communication port of the control module 120. A schottky diode D6 is connected in series between the voltage input pin of the key communication chip and the voltage output terminal of the power module 110, and the signal input/output pin of the key communication chip is electrically connected to the external socket 200.
The electric control main board 100 of the charging control circuit of the double-control lock key station in the embodiment of the application adopts a single bus communication mode, so that I/O resources can be effectively saved. The key communication chip of the double-control lock is directly controlled by the control module 120. When less external double-control lock key equipment is connected with the double-control lock key station, a lithium battery carried by the double-control lock key reversely applies extra voltage to a 5V power supply, and therefore a Schottky diode D6 is added at a 4-pin VCC end of the double-control lock key communication chip. The anode of the Schottky diode D6 is connected with a 3.3V power supply, and the cathode is connected with a VCC end.
As shown in fig. 1, 5 or 6, the upper computer communication module 130 includes an upper computer communication chip, a voltage input end of the upper computer communication chip is electrically connected to a voltage output end of the power module 110, and a T2I pin and an R2O pin of the upper computer communication chip are electrically connected to an upper computer communication port of the control module 120. And the T2O pin and the R2I pin of the communication chip of the upper computer are suitable for being electrically connected with the upper computer. The control module 120 is a microprocessor.
And the level conversion chip (upper computer communication chip) is used for communicating with an upper computer and converting TTL serial port signals into RS232 serial port signals. The upper computer interface adopts a DB9 serial port connector, and has universal universality when being connected with an upper computer or a computer.
The control module 120 employs a high performance, low power consumption AVR 8-bit microprocessor U3. The communication data between the upper computer and the double-control lock key can be effectively processed, and the function practicability of the double-control lock key is realized.
In a possible implementation manner, the dual-control lock further includes a display module 300, and the display module 300 is electrically connected to the control module 120, so that the state of the dual-control lock key after receiving the command of the upper computer can be displayed.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A charging control circuit of a double-control lock key station is characterized by comprising a double-control lock key charging module; the double-control lock key charging module comprises a battery charging management chip and a charging state indicator lamp;
the BAT pin of the battery charging management chip is suitable for being electrically connected with the positive electrode of the lithium battery to be charged, and the grounding pin of the battery charging management chip is suitable for being electrically connected with the negative electrode of the lithium battery;
the current-limiting resistor is externally connected with a drain open-circuit charging state output pin of the battery charging management chip, and the current-limiting resistor and the charging state indicator lamp are connected in series between the drain open-circuit charging state output pin and a voltage input pin;
the drain open-circuit charging state output pin is externally connected with a pull-up resistor, and the pull-up resistor is electrically connected between the drain open-circuit charging state output pin and the voltage input pin;
the voltage input pin of the battery charging management chip is used for inputting driving voltage, and the grounding pin of the battery charging management chip is grounded.
2. The circuit of claim 1, wherein the battery charge management chip is further configured with a charge current programming pin;
and a first resistor is connected in series between the charging current programming pin and the grounding end.
3. The circuit of claim 1, wherein a capacitor bank is connected in series between the voltage input pin of the battery charging management chip and a ground terminal;
the capacitor group comprises a first capacitor and a second capacitor which are connected in parallel;
a first diode is also connected in series between the voltage input pin and the capacitor bank;
the anode of the first diode is electrically connected with the capacitor bank, and the cathode of the first diode is electrically connected with the voltage input pin.
4. The circuit of claim 1, wherein a second resistor is further connected in series between the voltage input pin of the battery charge management chip and the BAT pin;
and a third capacitor is connected in series between the BAT pin and the ground terminal.
5. The circuit according to any one of claims 1 to 4, further comprising a power module, a control module, an upper computer communication module, a double-control lock key communication module and an external socket;
the power module, the control module, the upper computer communication module, the double-control lock key communication module and the double-control lock key charging module are integrated on the electric control mainboard;
the input end of the power supply module is suitable for being electrically connected with a power supply and is used for supplying power to the control module, the upper computer communication module, the double-control lock key communication module and the double-control lock key charging module;
the communication port of the upper computer communication module is electrically connected with the upper computer communication port of the control module, and the control module is electrically connected with the external socket through the double-control lock key communication module.
6. The dual lock key station charging control circuit of claim 5, wherein the power module comprises a voltage step-down module and a voltage regulator;
the voltage input end of the voltage reduction module is suitable for being electrically connected to the power supply, the voltage output end of the voltage reduction module is electrically connected with the voltage input end of the voltage stabilizer, and the grounding end of the voltage reduction module is grounded;
the voltage output end of the voltage stabilizer is electrically connected to the double-control lock key communication module and the upper computer communication module;
and the voltage output end of the voltage reduction module is electrically connected to the double-control lock key charging module.
7. The tandem lock key station charging control circuit of claim 6, wherein the power module further comprises a rectifier bridge, a transient suppression diode, and a fourth capacitor;
the voltage input positive pole and the voltage input negative pole of the rectifier bridge are suitable for being electrically connected with two poles of the power supply, the voltage output positive pole of the rectifier bridge is electrically connected with the voltage input end of the voltage reduction module, and the voltage output negative pole of the rectifier bridge is grounded;
the transient suppression diode is electrically connected between the voltage input anode of the rectifier bridge and the voltage input cathode of the rectifier bridge;
the fourth capacitor is connected in parallel with the transient suppression diode.
8. The dual lock key station charging control circuit of claim 6, wherein the power module further comprises a third resistor, a light emitting diode, and a fourth resistor;
the third resistor and the light emitting diode are connected in series and then electrically connected between the voltage output end of the voltage reduction module and a ground end;
wherein the cathode of the light emitting diode is grounded;
the fourth resistor is connected in series with the voltage output end of the voltage stabilizer;
a plurality of filter capacitors connected in parallel are electrically connected between the voltage output end of the voltage reduction module and the grounding end;
a plurality of filter capacitors connected in parallel are electrically connected between the voltage input end of the voltage stabilizer and the grounding end of the voltage stabilizer, and a filter capacitor is electrically connected between the voltage output end of the voltage stabilizer and the grounding end.
9. The bi-lock key station charging control circuit of claim 5, wherein the bi-lock key communication module comprises a bi-lock key communication chip;
the voltage input pin of the double-control lock key communication chip is electrically connected with the voltage output end of the power module, and the serial data pin of the double-control lock key communication chip are electrically connected to the double-control lock key communication port of the control module;
a Schottky diode is connected in series between a voltage input pin of the double-control lock key communication chip and a voltage output end of the power module;
and a signal input/output pin of the double-control lock key communication chip is electrically connected to the external socket.
10. The dual lock key station charging control circuit of claim 5, wherein the host computer communication module comprises a host computer communication chip;
the voltage input end of the upper computer communication chip is electrically connected with the voltage output end of the power supply module, and the T2I pin and the R2O pin of the upper computer communication chip are electrically connected with the upper computer communication port of the control module;
the T2O pin and the R2I pin of the upper computer communication chip are suitable for being electrically connected with an upper computer;
the control module is a microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020832826.5U CN212085849U (en) | 2020-05-18 | 2020-05-18 | Double-control lock key station charging control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020832826.5U CN212085849U (en) | 2020-05-18 | 2020-05-18 | Double-control lock key station charging control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116526626A (en) * | 2023-05-08 | 2023-08-01 | 闪极科技(深圳)有限公司 | Charging circuit supporting programmable charging and charging method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116526626A (en) * | 2023-05-08 | 2023-08-01 | 闪极科技(深圳)有限公司 | Charging circuit supporting programmable charging and charging method |
| CN116526626B (en) * | 2023-05-08 | 2023-12-29 | 闪极科技(深圳)有限公司 | Charging circuit supporting programmable charging and charging method |
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