CN215494646U - Switch control circuit and power supply management system - Google Patents
Switch control circuit and power supply management system Download PDFInfo
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- CN215494646U CN215494646U CN202122197112.9U CN202122197112U CN215494646U CN 215494646 U CN215494646 U CN 215494646U CN 202122197112 U CN202122197112 U CN 202122197112U CN 215494646 U CN215494646 U CN 215494646U
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Abstract
The utility model discloses a switch control circuit. The switch control circuit includes: the switching circuit comprises a switching module, and the switching circuit outputs a switching control signal based on a trigger signal generated by a user on the switching action of the switching module; a signal conversion circuit electrically connected to the switching circuit, the signal conversion circuit configured to receive the switching control signal and convert the switching control signal into a pulse control signal; and the microcontroller is electrically connected with the signal conversion circuit and is configured to receive the pulse control signal and control the electric connection between the switch control circuit and a power supply loop to be switched on or switched off according to the pulse control signal. The method and the device can reduce the power consumption of the system and prolong the service life of the system. The power supply is particularly suitable for occasions with high voltage, low power consumption and wide working voltage range. In addition, a power supply management system is also provided.
Description
Technical Field
The utility model relates to the technical field of automatic control, in particular to a switch control circuit and a power supply management system.
Background
With the increasing improvement of living standard, more and more scientific and technical products and automobile products are going into the daily life of people, wherein, the motorcycle is taken as the solution of last few kilometers by more and more people with the advantages of flexibility, rapidness, difficult jam and the like.
The traditional motorcycle uses fuel oil as consumption, on one hand, the motorcycle is not friendly to the environment, and on the other hand, the motorcycle is not enough in noise and comfort. Therefore, the pure electric driven motorcycle is suitable for transportation, and the pure electric motorcycle is popular with the advantages of energy conservation, environmental protection, silence and the like. In order to maximize the endurance mileage of the pure electric motorcycle, a corresponding battery management system is needed to monitor and manage parameters of the battery, such as charging and discharging. While the circuitry used to supply the battery management system is typically power hungry and requires additional tapping of the corresponding switch. This is extremely inconvenient.
Therefore, how to solve the problems that the power consumption of the conventional circuit for supplying the battery management system is usually high and the corresponding switch needs to be touched is an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a switch control circuit, which includes:
the switching circuit comprises a switching module, and the switching circuit outputs a switching control signal based on a trigger signal generated by a user on the switching action of the switching module;
a signal conversion circuit electrically connected to the switching circuit, the signal conversion circuit configured to receive the switching control signal and convert the switching control signal into a pulse control signal;
and the microcontroller is electrically connected with the signal conversion circuit and is configured to receive the pulse control signal and control the electric connection between the switch control circuit and a power supply loop to be switched on or switched off according to the pulse control signal.
The switch control circuit is provided with a signal conversion circuit to convert a switch control signal output by the switch circuit into a pulse control signal, and then is provided with a microcontroller to receive the pulse control signal and control the electric connection between the switch control circuit and a power supply loop to be switched on or off according to the pulse control signal. That is, the electrical connection between the switch control circuit and the power supply loop is accurately turned on or off in real time according to the switching state of the switch module through the conversion of the signal. The additional light touch switch is not needed, and meanwhile, the power consumption of the system can be reduced, and the service life of the system is prolonged. The power supply is particularly suitable for occasions with high voltage, low power consumption and wide working voltage range.
In one embodiment, the device further comprises a power supply switch;
the power supply switch is connected between the switch control circuit and the power supply loop.
In one embodiment, the signal conversion circuit comprises a first signal conversion module and a second signal conversion module;
the first signal conversion module is respectively connected with the switch module and the power supply switch, and is configured to convert the switch control signal into a high-level pulse control signal for output;
the second signal conversion module is connected with the first signal conversion module, and the second signal conversion module is configured to convert the high-level pulse control signal into a high-level pulse control signal output or a low-level pulse control signal output.
In one embodiment, the method further comprises the following steps:
the signal sampling circuit is connected between the second signal conversion module and the microcontroller and is used for sampling the high-level pulse control signal or the low-level pulse control signal output by the second signal conversion module and transmitting the high-level pulse control signal or the low-level pulse control signal to the microcontroller;
and the microcontroller switches on or off the power supply switch according to the high-level pulse control signal or the low-level pulse control signal.
In one embodiment, the first signal conversion module is further connected with the power supply switch;
the power supply switch is configured to receive the high-level pulse control signal output by the first signal conversion module.
In one embodiment, the first signal conversion module comprises a resistor R58, a second resistor R65, a capacitor C43 and an optocoupler U12;
a first end of the resistor R58 is connected with the output end of the switch module, and a second end of the resistor R58 is connected with a first end of the resistor R65;
a second terminal of the resistor R65 is connected to a first terminal of the capacitor C43, and a second terminal of the capacitor C43 is connected to an input terminal of the optocoupler U12;
the output end of the optical coupler U12 is connected with the power supply switch.
In one embodiment, the second signal conversion module includes a diode D6, a diode D7, a zener diode ZD5, a resistor R66, a switch M11, a resistor R59, a resistor R60, a resistor R67, and a resistor R68;
a first terminal of the diode D6 is connected between the switch module and the common terminal of the resistor R58, and a second terminal of the diode D6 is connected to the first terminal of the switch transistor M11;
a first terminal of the diode D7 is connected between the resistor R65 and the common terminal of the capacitor C43, and a second terminal of the diode D7 is connected to a second terminal of the switching tube M11;
the zener diode ZD5 is connected between the second end of the diode D7 and the first end of the switch tube M11;
the resistor R66 is connected between the second end of the diode D7 and the first end of the switch tube M11;
a first end of the resistor R59 is connected with a first end of the switch tube M11, a second end of the resistor R59 is connected with a first end of the resistor R60, and a second end of the resistor R60 is grounded;
the first end of the resistor R67 is connected with the third end of the switch tube M11, the second end of the resistor R67 is connected with the first end of the resistor R68, and the second end of the resistor R68 is connected with the signal sampling circuit.
In one embodiment, the method further comprises the following steps:
and the protection circuit is connected between a power supply and the switch control circuit and is used for protecting the switch control circuit.
In one embodiment, the switch module comprises a normally open/normally closed switch.
Based on the same inventive concept, the present application further provides a power supply management system, including:
a switch control circuit as claimed in any one of the preceding claims; and
and the power supply circuit is connected with the switch control circuit and is used for providing electric energy for a battery management system.
The power supply management system comprises the switch control circuit and a power supply loop, wherein the switch control circuit is provided with a signal conversion circuit to convert a switch control signal output by the switch circuit into a pulse control signal, and then is provided with a microcontroller to receive the pulse control signal and control the electric connection between the switch control circuit and the power supply loop to be switched on or off according to the pulse control signal. That is, the electrical connection between the switch control circuit and the power supply loop is accurately turned on or off in real time according to the switching state of the switch module through the conversion of the signal. Furthermore, the off/on state of the battery management system connected with the power supply loop can be consistent with the on/off state of the switch module. Therefore, the power consumption of the system can be reduced, and the service life of the system can be prolonged. The power supply is particularly suitable for occasions with high voltage, low power consumption and wide working voltage range.
Drawings
FIG. 1 is a block diagram of a switch control circuit according to an embodiment;
FIG. 2 is a block diagram of a switch control circuit in another embodiment;
FIG. 3 is a circuit diagram of an embodiment of a switch control circuit;
FIG. 4 is a circuit diagram of the switch circuit shown in FIG. 3;
fig. 5 is a schematic circuit structure diagram of the first signal conversion module in fig. 3;
FIG. 6 is a schematic circuit diagram of a second signal conversion module shown in FIG. 3;
FIG. 7 is a schematic diagram of the circuit structure of the signal sampling circuit in FIG. 3;
FIG. 8 is a schematic circuit diagram of the microcontroller shown in FIG. 3;
FIG. 9 is a schematic circuit diagram of the power supply switch of FIG. 3;
fig. 10 is a circuit structure diagram of the protection circuit in fig. 3.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As described in the foregoing background, the conventional switch control circuit needs a light touch switch, and has high operating power consumption, high cost, complex circuit and poor stability.
In view of the above, the present application is intended to provide a new solution to the above-mentioned technical problem, and the specific structure thereof will be described in detail in the following embodiments.
Reference may be made to fig. 1, which is a block diagram of a switch control circuit provided in the present application. The switch control circuit can be applied to a power supply system loop of an electric motorcycle BMS (battery management system). The switch control circuit may include a switch circuit 10, a signal conversion circuit 20, and a microprocessor 310; reference may be made to fig. 3 or fig. 4. The switch circuit of the present application may include a switch module SW1, and the switch circuit of the present application mainly outputs a switch control signal SW0 (accordingly, the switch control signal SW0 is an on signal or an off signal) based on a trigger signal generated by a user's switching action (e.g., on or off) of the switch module SW 1; it is to be understood that the switch control signal SW0 may be a high level signal, such as "1"; it may be a low level signal, for example, "0".
Optionally, the switch module SW1 of the present application may be a normally open/normally closed switch, but it is understood that the switch module SW1 may also be other similar switches, such as relays, membrane switches, etc. The present application is not further limited herein.
With continued reference to fig. 1, a signal conversion circuit 20, electrically connected to the switch circuit 10, the signal conversion circuit 20 configured to receive the switch control signal SW0 and convert the switch control signal SW0 into a pulse control signal S2. As described above, the switch control signal SW0 is only a high level signal or a low level signal, and after the conversion by the signal conversion circuit 20, it becomes the pulse control signal SC, and the pulse control signal SC is a control signal with a duty ratio that is periodically overlapped by high and low levels. The conversion principle of the signal conversion circuit 20 will be described in the following specific embodiment.
With continuing reference to fig. 1, and with additional reference to fig. 2, a microcontroller 310 is electrically connected to the signal conversion circuit 20, and the microcontroller 310 is configured to receive the pulse control signal SC and control the electrical connection between the switch control circuit and a power supply circuit 2002 to be turned on or off according to the pulse control signal SC. The microcontroller 310 of the present application may be, for example, an MCU, and its specific type may be, for example, any available integrated chip capable of implementing microprocessing and microcontrol. The operation principle of the microcontroller 310 will be described in the following embodiments with reference to the signal conversion circuit 20 and the switch module SW 1.
The switch control circuit converts the switch control signal SW0 output by the switch circuit 10 into the pulse control signal SC by the setting signal conversion circuit 20, and then the microcontroller 310 is configured to receive the pulse control signal SC and control the electrical connection between the switch control circuit and a power supply circuit 2002 to be switched on or off according to the pulse control signal SC. That is, the signal conversion is used to implement the accurate and real-time conduction or closing of the electrical connection between the switch control circuit and the power supply circuit 2002 according to the switch state of the switch module SW1, so that the subsequent circuit connected to the power supply circuit 2002 enters the power-on or power-off state. Therefore, the power consumption of the subsequent system circuit can be reduced, and the service life of the system can be prolonged. The power supply is particularly suitable for occasions with high voltage, low power consumption and wide working voltage range.
In an embodiment, referring to fig. 2 again, the switch control circuit of the present application may further include a power supply switch 40; the power supply switch 40 is connected between the switch control circuit and the power supply circuit 2002. The microcontroller 310 controls the switch control circuit to be electrically connected to or disconnected from the power supply circuit 2002 according to the pulse control signal SC output by the signal conversion circuit 20, and in fact, the microcontroller 310 controls the power supply switch 40 to be electrically connected to or disconnected from the power supply circuit. The power switch 40 may include a field effect transistor, which may be a junction field effect transistor or a metal oxide field effect transistor; in addition, the field effect transistor can be an enhancement type field effect transistor and can also be a depletion type field effect transistor; further, the fet may be a P-type fet or an N-type fet, which is not further limited herein. The power switch 40 may also be another type of switch. In addition, since the power switch 40 can be a switch tube of different types, the signal for turning on or off can be a high level or a low level, that is, the power switch can be turned on at a low level and turned off at a high level; alternatively, the high level is on and the low level is off.
In one embodiment, with continued reference to fig. 2, the signal conversion circuit 20 of the present application may include a first signal conversion module 210 and a second signal conversion module 220.
The first signal conversion module 210 is respectively connected to the switch module SW1 and the power supply switch 40, and the first signal conversion module 210 is configured to convert the switch control signal SW0 into a high-level pulse control signal SC1 and output the high-level pulse control signal. Specifically, the first signal conversion module 210 mainly performs the conversion when the switch control signal SW0 is at a high level, i.e., the switch module SW1 is in a normally closed state. The high-level pulse control signal SC1 means that during the time period when the switch module SW1 is normally closed, the pulse control signal SC1 outputted by the first signal conversion module 210 is all high-level.
The second signal conversion module 220 is connected to the first signal conversion module 210, and the second signal conversion module 220 is configured to convert the high-level pulse control signal SC1 into a high-level pulse control signal SC2 output or a low-level pulse control signal SC3 output. Specifically, when the switch module SW1 is in the normally closed state, the second signal conversion module 220 outputs the high-level pulse control signal SC1 converted by the first signal conversion module 210; when the switch module SW1 is in the normally open state, the second signal conversion module 220 converts the high-level pulse control signal SC2 converted by the first signal conversion module 210 into the low-level pulse control signal SC3 for output.
Further, as shown in fig. 2, the first signal conversion module 210 of the present application is further connected to the power supply switch 40; the power supply switch 40 is configured to receive the high-level pulse control signal SC1 output by the first signal conversion module 210. That is, when the switch module SW1 is in the normally closed state, the power switch 40 can be directly operated by the high-level pulse control signal SC1 converted by the first signal conversion module 210.
Referring to fig. 2, in an embodiment, the switch control circuit of the present application may further include:
a signal sampling circuit 320, wherein the signal sampling circuit 320 is connected between the second signal conversion module 220 and the microcontroller 310, and is configured to sample the high-level pulse control signal SC2 or the low-level pulse control signal SC2 output by the second signal conversion module 220 and transmit the same to the microcontroller 310.
The microcontroller 310 turns on or off the power switch 40 according to the high-level pulse control signal SC2 or the low-level pulse control signal SC 3. That is, besides the aforementioned power switch 40 can be operated by the high-level pulse control signal SC1 output by the first signal conversion module 210, it can be turned on or off by the microcontroller 310 according to the received high-level pulse control signal SC2 or the received low-level pulse control signal SC3 collected by the signal sampling circuit 320. Thereby realizing the conduction or the closing between the switch control circuit and the power supply loop 2002.
In one embodiment, with continuing reference to fig. 2, the switch control circuit of the present application may further comprise:
a protection circuit 50, wherein the protection circuit 50 is connected between a power source (not shown) and the switch control circuit for protecting the switch control circuit. Specifically, the protection circuit 50 may have functions of rectifying and filtering, reverse connection prevention, overcurrent or short circuit protection, and absorption of transient pulse high voltage, and the specific protection principle will be described in the following embodiments.
In order to facilitate understanding of the operation principle of the switch control circuit of the present application, the following describes a specific configuration and principle of the switch control circuit of the present application with reference to fig. 3 to 10. The switch control circuit may include, in turn, a protection circuit 50, a power supply switch 40, a microcontroller 310, a switching circuit 10, a first signal conversion module 210, a second signal conversion module 220, and a signal sampling circuit 320.
The protection circuit 50 may include a diode D4, a resistance wire F1, a zener diode TVS1 and a capacitor C11, wherein the diode D4 is connected to an input power source, the resistance wire F1 is connected to a diode D4, one end of the zener diode TVS1 is connected to the resistance wire F1, the other end of the zener diode TVS1 is grounded, one end of the capacitor C11 is connected to the resistance wire F1, and the other end of the capacitor C11 is grounded. The diode D4 and the capacitor C11 play roles in rectifying, filtering and reverse connection prevention, the resistance wire F1 plays a role in overcurrent or short-circuit protection, and the voltage stabilizing diode TVS1 absorbs high voltage of transient pulse, so that rear-end devices are protected.
The switch circuit 10 includes a diode D5 and a switch module SW1, an input end of the diode D5 is connected to the resistance wire F1, an output end is connected to the switch module SW1, and the subsequent switch module SW1 is exemplified by a normally open/normally closed switch.
The first signal conversion module 210 includes a resistor R58, a second resistor R65, a capacitor C43, and an optocoupler U12;
a first end of the resistor R58 is connected with the output end of the switch module SW1, and a second end of the resistor R58 is connected with a first end of the resistor R65;
a second terminal of the resistor R65 is connected to a first terminal of the capacitor C43, and a second terminal of the capacitor C43 is connected to an input terminal of the optocoupler U12;
the output end of the optical coupler U12 is connected with the power supply switch.
The second signal conversion module 220 comprises a diode D6, a diode D7, a zener diode ZD5, a resistor R66, a switching tube M11, a resistor R59, a resistor R60, a resistor R67, and a resistor R68;
a first terminal of the diode D6 is connected between the switch module SW1 and the common terminal of the resistor R58, and a second terminal of the diode D6 is connected to the first terminal of the switching tube M11;
a first terminal of the diode D7 is connected between the resistor R65 and the common terminal of the capacitor C43, and a second terminal of the diode D7 is connected to a second terminal of the switching tube M11;
the zener diode ZD5 is connected between the second end of the diode D7 and the first end of the switch tube M11;
the resistor R66 is connected between the second end of the diode D7 and the first end of the switch tube M11;
a first end of the resistor R59 is connected with a first end of the switch tube M11, a second end of the resistor R59 is connected with a first end of the resistor R60, and a second end of the resistor R60 is grounded;
the first end of the resistor R67 is connected with the third end of the switch tube M11, the second end of the resistor R67 is connected with the first end of the resistor R68, and the second end of the resistor R68 is connected with the signal sampling circuit 320.
The microcontroller 310 comprises a resistor R54, a resistor R56 and a switch tube M6; the resistor R54 is connected with a PW-ON pin of the MCU, and the other end of the resistor R54 is connected with the first end of the switch tube M6; one end of the resistor R56 is connected between the resistor R54 and the common end of the switch tube M6, the other end is grounded, the second end of the switch tube M6 is grounded, the third end is connected with the 4-pin of the optocoupler U12, and the third end is also connected with the first end of the resistor R51. It will be appreciated that the MCU core is not actually shown in the microcontroller 310 of the present application, and that the core is subsequently represented as an MCU.
The power supply switch 40 comprises a resistor R48, a resistor R51, a switch tube M4 and a capacitor C32, wherein the second end of the resistor R51 is connected with the first end of a resistor R48, the first end of the switch tube M4 is connected with the second end of a resistor R48, the second end of the switch tube M4 is connected between the common end of the resistor R48 and the common end of the resistor R51, and the third end of the switch tube M4 is connected with an output.
The signal sampling circuit 320 comprises an optical coupler U11 and a resistor R61, wherein the input end of the optical coupler U11 is connected with the second end of the resistor R68, the input end of the resistor R61 is connected with a 3.3V input voltage, the output end of the resistor R61 is connected with the SW pin of the microcontroller 310, and the output end of the optical coupler U11 is also connected with the SW pin of the microcontroller 310.
The concrete during operation:
when the normally open/normally closed switch SW1 is closed, the diode D5, the switch module SW1, the resistor R58, the resistor R65, the capacitor C43 and a circuit where the optical coupler U12 is located are conducted to charge the capacitor C43, a 1-2 pin luminous tube of the optical coupler U12 is made to emit light and a 3-4 pin of the optical coupler U12 is conducted in the charging process of the capacitor C43, and after voltage division is carried out through the resistor R48 and the resistor R51, the light is transmitted to a control pin of the switch tube M4 to enable the switch tube M4 to be conducted, so that the switch tube M4 is communicated with a subsequent power supply loop. During this period, the PW _ ON pin of the MCU outputs a high level, which is divided by the resistor R54 and the resistor R56 to the control pin of the switch transistor M6, so that the switch transistor M6 is turned ON to maintain the conduction of the switch transistor M4. The MCU is powered on, and after the MCU is powered on, the MCU will provide a high voltage control signal to turn on the switch M6, so that the switch M4 connected to the power supply circuit 2002 is always kept on.
When the normally open/normally closed switch SW1 is turned off, the capacitor C43 discharges, and the voltage is divided into a control pin of the switching tube M11 through the diode D7, the zener diode ZD5, the resistor R66, the resistor R65, the resistor R58, the diode D6, the resistor R59 and the resistor R60, so that the switching tube M11 is turned on.
When the switch tube M11 is switched on, the light emitting tube of 1-2 pins of the optical coupler U11 emits light through the resistor R67, the resistor R68 and the optical coupler U11, the 3-4 pins are switched on, and the voltage is divided through the resistor R61, so that the SW pin signal of the MCU is pulled down, and the discharge duration of the capacitor C43 is limited; so that the MCU detects a pulse signal that is high or low. At this time, the MCU will provide a low-level control signal to turn off the switch M6, thereby turning off the switch M4, and further cutting off the system power supply loop 2002.
The normally open/normally closed switch SW1 is combined with the charging and discharging characteristics of the capacitor C43 in the switch control loop, so that the off/on state of the battery management system connected with the power supply loop 2002 is consistent with the on/off state of the normally open/normally closed switch SW 1.
Based on the same inventive concept, the application also provides a power supply management system, which can be applied to a BMS (battery management system) power supply system loop of an electric motorcycle. With additional reference to fig. 2 and 3, the power management system may include the switch control circuit and a power supply loop 2002 according to any of the embodiments described above. The power supply circuit 2002 is used for supplying power to the BMS system. The main working principle of the system is as follows: when the switch module SW is normally closed, the first signal conversion module 210 in the switch control circuit is powered on and charges the capacitor C43 therein, and the power supply switch 40 is enabled to conduct the power supply circuit 2002, the power supply circuit 2002 then supplies power to the BMS system, and the BMS system enters a power-on state. The BMS system is used for controlling and managing the battery. When the switch module SW is switched to be normally open, the capacitor C43 in the first signal conversion module 210 discharges, and since the discharge of the capacitor C43 is a slow process, after passing through the second signal conversion module 220, the pulse control signal collected by the signal sampling circuit 320 also has a corresponding high-to-low change process, and after being transmitted to the microcontroller 310, the SW pin signal of the microcontroller 310 is pulled low, and the microcontroller 310 provides a low-level control signal to turn off the switch tube M6 in the power supply switch 40, so that the power supply loop 2002 stops supplying power to the BMS system, and the BMS system enters a shutdown state. Thus, the requirements of low power consumption and high voltage can be realized.
In summary, the power management system of the present application includes the switch control circuit and the power supply loop described in any of the foregoing embodiments, and the switch control circuit converts the switch control signal output by the switch circuit into the pulse control signal by using the charge-discharge characteristic of the capacitor, and then the microcontroller is configured to receive the pulse control signal and control the electrical connection between the switch control circuit and the power supply loop to be turned on or off according to the change of the pulse control signal. That is, the electrical connection between the switch control circuit and the power supply loop is accurately turned on or off in real time according to the switching state of the switch module through the charging and discharging characteristics of the capacitor. Furthermore, the off/on state of the battery management system connected with the power supply loop can be consistent with the on/off state of the switch module. Therefore, the power consumption of the system can be reduced, and the service life of the system can be prolonged. The power supply is particularly suitable for occasions with high voltage, low power consumption and wide working voltage range.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A switch control circuit, comprising:
the switching circuit comprises a switching module, and the switching circuit outputs a switching control signal based on a trigger signal generated by a user on the switching action of the switching module;
a signal conversion circuit electrically connected to the switching circuit, the signal conversion circuit configured to receive the switching control signal and convert the switching control signal into a pulse control signal;
and the microcontroller is electrically connected with the signal conversion circuit and is configured to receive the pulse control signal and control the electric connection between the switch control circuit and a power supply loop to be switched on or switched off according to the pulse control signal.
2. The switch control circuit of claim 1, further comprising a power supply switch;
the power supply switch is connected between the switch control circuit and the power supply loop.
3. The switch control circuit of claim 2, wherein the signal conversion circuit comprises a first signal conversion module and a second signal conversion module;
the first signal conversion module is respectively connected with the switch module and the power supply switch, and is configured to convert the switch control signal into a high-level pulse control signal for output;
the second signal conversion module is connected with the first signal conversion module, and the second signal conversion module is configured to convert the high-level pulse control signal into a high-level pulse control signal output or a low-level pulse control signal output.
4. The switch control circuit of claim 3, further comprising:
the signal sampling circuit is connected between the second signal conversion module and the microcontroller and is used for sampling the high-level pulse control signal or the low-level pulse control signal output by the second signal conversion module and transmitting the high-level pulse control signal or the low-level pulse control signal to the microcontroller;
and the microcontroller switches on or off the power supply switch according to the high-level pulse control signal or the low-level pulse control signal.
5. The switch control circuit of claim 3, wherein the first signal conversion module is further connected to the power switch;
the power supply switch is configured to receive the high-level pulse control signal output by the first signal conversion module.
6. The switch control circuit of claim 3, wherein the first signal conversion module comprises a resistor R58, a second resistor R65, a capacitor C43, and an optocoupler U12;
a first end of the resistor R58 is connected with the output end of the switch module, and a second end of the resistor R58 is connected with a first end of the resistor R65;
a second terminal of the resistor R65 is connected to a first terminal of the capacitor C43, and a second terminal of the capacitor C43 is connected to an input terminal of the optocoupler U12;
the output end of the optical coupler U12 is connected with the power supply switch.
7. The switch control circuit according to claim 6, wherein the second signal conversion module comprises a diode D6, a diode D7, a zener diode ZD5, a resistor R66, a switch tube M11, a resistor R59, a resistor R60, a resistor R67 and a resistor R68;
a first terminal of the diode D6 is connected between the switch module and the common terminal of the resistor R58, and a second terminal of the diode D6 is connected to the first terminal of the switch transistor M11;
a first terminal of the diode D7 is connected between the resistor R65 and the common terminal of the capacitor C43, and a second terminal of the diode D7 is connected to a second terminal of the switching tube M11;
the zener diode ZD5 is connected between the second end of the diode D7 and the first end of the switch tube M11;
the resistor R66 is connected between the second end of the diode D7 and the first end of the switch tube M11;
a first end of the resistor R59 is connected with a first end of the switch tube M11, a second end of the resistor R59 is connected with a first end of the resistor R60, and a second end of the resistor R60 is grounded;
the first end of the resistor R67 is connected with the third end of the switch tube M11, the second end of the resistor R67 is connected with the first end of the resistor R68, and the second end of the resistor R68 is connected with the signal sampling circuit.
8. The switch control circuit according to any one of claims 1 to 7, further comprising:
and the protection circuit is connected between a power supply and the switch control circuit and is used for protecting the switch control circuit.
9. The switch control circuit of any of claims 1-7, wherein the switch module comprises a normally open/normally closed switch.
10. A power supply management system, characterized in that the power supply management system comprises:
the switch control circuit of any one of claims 1-9; and
and the power supply circuit is connected with the switch control circuit and is used for providing electric energy for a battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122197112.9U CN215494646U (en) | 2021-09-09 | 2021-09-09 | Switch control circuit and power supply management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122197112.9U CN215494646U (en) | 2021-09-09 | 2021-09-09 | Switch control circuit and power supply management system |
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| Publication Number | Publication Date |
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| CN202122197112.9U Active CN215494646U (en) | 2021-09-09 | 2021-09-09 | Switch control circuit and power supply management system |
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