Control circuit for automatic start and stop of vehicle storage battery

Abstract

The utility model provides a control circuit for automatic start and stop of a vehicle storage battery. The control circuit comprises a storage battery power supply circuit, a key electric control circuit, a microcontroller module, a post-processing circuit and a vehicle electric circuit. The storage battery power supply circuit is connected with the key electric control circuit, the microcontroller module, the post-processing circuit and the vehicle electric circuit. The microcontroller module is respectively connected with the key electric control circuit, the post-processing circuit and the vehicle electric circuit; during power-on, the key electric control circuit provides a power supply of the storage battery power supply circuit for the microcontroller module; the microcontroller module controls the post-processing circuit and the vehicle electric circuit to be powered on respectively by outputting a high-level signal; during power failure, the key electric control circuit sends out a low-level signal; and the microcontroller module respectively controls the post-processing circuit, the vehicle electric circuit and the key electric control circuit to be powered off by outputting a low-level signal. Through the circuit, the control efficiency of starting and stopping of the vehicle and the user experience are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle battery start-stop, in particular to a control circuit for automatic start-stop of a vehicle battery. Background Art

[0002] The vehicle's battery is an important component when the vehicle is powered on and started. The vehicle generally uses a lead-acid battery as the battery, and the vehicle's DC power supply control circuit is composed of the configured manual main switch, distribution circuit, key power switch and central electrical box. Before the vehicle is powered on and started, the main switch must be turned on, the key must be turned to the power-on position, and the vehicle's power relay must be connected to power on the entire vehicle. By turning the key to the power-off position, the vehicle's power relay is disconnected, and then the main switch is turned off to power off the entire vehicle.

[0003] Since some electrical components of the vehicle (such as turn signals, microcontrollers, etc.) are not controlled by turning the key but are directly controlled by the main switch, if the vehicle is parked for a long time and the main switch is forgotten to be turned off, it will cause vehicle battery loss and inability to start the vehicle, and even pose a safety hazard. After most vehicles adopt the National IV engine, it is required that the power cannot be cut off immediately after the vehicle is turned off, making it impossible to control the power off of the vehicle battery by turning off the main switch, reducing the control efficiency of the vehicle start-stop and reducing the user experience of vehicle start-stop. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a control circuit for automatic start and stop of a vehicle battery. By adding a relay in the key electrical circuit, the electrical signal interaction between the microcontroller module and the key electrical circuit is realized. At the same time, only the main switch for emergency start and stop is retained, and the function of manual switch to control vehicle start and stop is cancelled. The level signal of the key electrical control circuit is controlled by turning the key switch to perform automatic start and stop control for the vehicle battery. In general, for vehicles equipped with post-processing delay relays, the vehicle power cut-off can be directly controlled by the key electrical circuit, which improves the control efficiency of the vehicle start and stop, and thus improves the user experience of vehicle start and stop.

[0005] The embodiment of the present application provides a control circuit for automatic start and stop of a vehicle battery, the control circuit comprising: a battery power supply circuit, a key power control circuit, a microcontroller module, a post-processing circuit and a vehicle power circuit:

[0006] The battery power supply circuit is respectively connected to the key electric control circuit, the microcontroller module, the post-processing circuit and the vehicle power circuit; the microcontroller module is respectively connected to the key electric control circuit, the post-processing circuit and the vehicle power circuit;

[0007] When the vehicle is powered on, the key electric control circuit receives the power-on signal of the key electric switch and provides the power output of the battery power supply circuit to the microcontroller module; the microcontroller module controls the post-processing circuit and the vehicle power circuit to be powered on respectively by outputting a high-level signal;

[0008] When the vehicle is powered off and shut down, the key electrical control circuit receives the power-off signal of the key electrical switch and outputs a low-level signal to the microcontroller module; the microcontroller module responds to the change of the input level signal by outputting a low-level signal to control the post-processing circuit and the vehicle power circuit to disconnect and power off, and controls the key electrical control circuit to power off.

[0009] Furthermore, the battery power supply circuit includes: a battery and a manual control switch:

[0010] The first end of the battery is connected to the first end of the manual control switch; the second end of the manual control switch is respectively connected to the first end of the key electrical control circuit, the first end of the post-processing circuit and the first end of the vehicle electrical circuit; the second end of the battery is respectively connected to the second end of the key electrical control circuit, the fifth end of the microcontroller module, the second end of the post-processing circuit and the second end of the vehicle electrical circuit.

[0011] Furthermore, the key electric control circuit includes: a key electric switch control circuit and a key electric self-locking relay:

[0012] The first end of the key electric switch control circuit and the first end of the key electric self-locking relay are respectively connected to the first end of the battery power supply circuit; the second end of the key electric switch control circuit and the second end of the key electric self-locking relay are respectively connected to the positive power supply terminal of the microcontroller module; the third end of the key electric switch control circuit is connected to the first output end of the microcontroller module; the third end of the key electric self-locking relay is connected to the second output end of the microcontroller module; the fourth end of the key electric switch control circuit and the fourth end of the key electric self-locking relay are respectively connected to the second end of the battery power supply circuit; the fifth end of the key electric switch control circuit is connected to the first input end of the microcontroller module.

[0013] Furthermore, the key electric switch control circuit includes: a key electric switch and a key electric relay.

[0014] The first end of the key electric switch is connected to the first end of the battery power supply circuit; the second end of the key electric switch is respectively connected to the first end and the sixth end of the key electric relay; the second end of the key electric relay is connected to the positive power supply terminal of the microcontroller module; the third end of the key electric relay is connected to the first output end of the microcontroller module; the fourth end of the key electric relay is connected to the second end of the battery power supply circuit; and the fifth end of the key electric relay is connected to the first input end of the microcontroller module.

[0015] Furthermore, the post-processing circuit includes: a post-processing delay relay and a post-processing system module:

[0016] The first end of the post-processing delay relay is connected to the first end of the battery power supply circuit; the second end of the post-processing delay relay is connected to the first end of the post-processing system module; the third end of the post-processing delay relay is connected to the fourth output end of the microcontroller module; the fourth end of the post-processing delay relay and the second end of the post-processing system module are respectively connected to the second end of the battery power supply circuit.

[0017] Furthermore, the vehicle power circuit includes: a main switch relay and a vehicle power module:

[0018] The first end of the main switch relay is connected to the first end of the battery power supply circuit; the second end of the main switch relay is connected to the first end of the vehicle power module; the third end of the main switch relay is connected to the third output end of the microcontroller module; the fourth end of the main switch relay and the second end of the vehicle power module are respectively connected to the second end of the battery power supply circuit.

[0019] Furthermore, the vehicle power module includes: a vehicle power relay, a power load and a power protection circuit

[0020] The first end of the vehicle electric relay and the first end of the power protection circuit are respectively connected to the second end of the main switch relay; the second end of the vehicle electric relay is connected to the first end of the power load; the fourth end of the vehicle electric relay, the second end of the power load and the second end of the power protection circuit are respectively connected to the second end of the battery power supply circuit.

[0021] Furthermore, the vehicle electric relay includes a plurality of independent power supply relays connected in parallel.

[0022] Furthermore, the power protection circuit includes: a power protection module and a battery diagnosis module:

[0023] The power protection module is arranged in the power supply circuit corresponding to the vehicle power module; the first end of the battery diagnosis module is connected to the second end of the main switch relay; the second input of the battery diagnosis module is connected to the second end of the battery power supply circuit.

[0024] Furthermore, it is characterized in that the power protection module includes a current detection module and a voltage detection module:

[0025] The current detection module is connected in series in the power supply circuit corresponding to the vehicle power module; the voltage detection module is connected in parallel at both ends of the power supply circuit.

[0026] A control circuit for automatic start and stop of a vehicle battery is provided in an embodiment of the present application, and the control circuit includes: a battery power supply circuit, a key power control circuit, a microcontroller module, a post-processing circuit and a vehicle power circuit: the battery power supply circuit is respectively connected to the key power control circuit, the microcontroller module, the post-processing circuit and the vehicle power circuit; the microcontroller module is respectively connected to the key power control circuit, the post-processing circuit and the vehicle power circuit; when the vehicle is powered on, the key power control circuit receives a power-on signal of a key power switch and provides a power output of the battery power supply circuit to the microcontroller module; the microcontroller module controls the post-processing circuit and the vehicle power circuit to be powered on respectively by outputting a high-level signal; when the vehicle is powered off and shut down, the key power control circuit receives a power-off signal of a key power switch and outputs a low-level signal to the microcontroller module; the microcontroller module controls the post-processing circuit and the vehicle power circuit to be powered off respectively by outputting a low-level signal in response to a change in the input level signal, and controls the key power control circuit to be powered off.

[0027] Compared with the circuit in the prior art that directly controls the start and stop of the vehicle battery by the main switch, so that some electrical devices of the vehicle are not controlled by turning the key, by adding a relay in the key electrical circuit, the electrical signal interaction between the microcontroller module and the key electrical circuit is realized, and at the same time only the main switch for emergency start and stop is retained, the function of manual switch controlling the start and stop of the vehicle is cancelled, and the level signal of the key electrical control circuit is controlled by turning the key switch to perform automatic start and stop control for the vehicle battery. In general, for vehicles equipped with post-processing delay relays, the vehicle power off can be directly controlled by the key electrical circuit, which improves the control efficiency of the vehicle start and stop, and thereby improves the user experience of vehicle start and stop.

[0028] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 One of the structural schematic diagrams of a vehicle battery automatic start-stop control circuit provided in an embodiment of the present application;

[0031] Figure 2 The second structural schematic diagram of a vehicle battery automatic start-stop control circuit provided in an embodiment of the present application;

[0032] Figure 3 The third structural diagram of a vehicle battery automatic start-stop control circuit provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of a vehicle power module provided in an embodiment of the present application.

[0034] Icon: Vehicle battery automatic start and stop control circuit: 10; Battery power supply circuit: 110; Key power control circuit: 120; Microcontroller module: 130; Post-processing circuit: 140; Vehicle power circuit: 150; Battery: 111; Manual control switch: 112; Key power switch control circuit: 121; Key power self-locking relay: 122; Key power switch: 1211; Key power relay: 1212; Post-processing delay relay: 141; Post-processing system module: 142; Main switch relay: 151; Vehicle power module: 152; Vehicle power relay: 1521; Power protection circuit: 1522; Power load: 1523; Power protection module: 15221; Battery diagnosis module: 15222; Current detection module: 152211; Voltage detection module: 152212. DETAILED DESCRIPTION

[0035] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0036] Research has found that, at present, since some electrical components of the vehicle (such as turn signals, microcontrollers, etc.) are not controlled by turning the key but are directly controlled by the main switch, if the vehicle is parked for a long time and the main switch is forgotten to be turned off, it will cause vehicle battery loss and inability to start the vehicle, and even pose a safety hazard. After most vehicles adopt the National IV engine, it is required that the power cannot be cut off immediately after the vehicle is turned off, making it impossible to control the power off of the vehicle battery by turning off the main switch, reducing the control efficiency of the vehicle start and stop, and reducing the user experience of vehicle start and stop.

[0037] Based on this, an embodiment of the present application provides a control circuit for automatic start and stop of a vehicle battery. By adding a relay in the key electrical circuit, electrical signal interaction between the microcontroller module and the key electrical circuit is realized. At the same time, only the main switch for emergency start and stop is retained, and the function of manual switch to control vehicle start and stop is cancelled. The level signal of the key electrical control circuit is controlled by turning the key switch to perform automatic start and stop control for the vehicle battery. In general, for vehicles equipped with post-processing delay relays, the vehicle power can be directly controlled to be cut off through the key electricity, which improves the control efficiency of the vehicle start and stop, and thereby improves the user experience of vehicle start and stop.

[0038] See also Figure 1 , Figure 1 This is one of the structural schematic diagrams of a vehicle battery automatic start-stop control circuit provided in an embodiment of the present application. Figure 1 As shown in the figure, a schematic diagram of the structure of the control circuit for automatic start and stop of a vehicle battery provided in an embodiment of the present application, the control circuit 10 includes: a battery power supply circuit 110, a key power control circuit 120, a microcontroller module 130, a post-processing circuit 140 and a vehicle power circuit 150.

[0039] The battery power supply circuit 110 is respectively connected to the key electric control circuit 120, the microcontroller module 130, the post-processing circuit 140 and the vehicle electric circuit 150; the microcontroller module 130 is respectively connected to the key electric control circuit 120, the post-processing circuit 140 and the vehicle electric circuit 150;

[0040] Specifically, when the vehicle is powered on, the key electrical control circuit 120 receives the power-on signal of the key electrical switch and provides the power output of the battery power supply circuit 110 to the microcontroller module 130; the microcontroller module 130 controls the post-processing circuit 140 and the vehicle power circuit 150 to be powered on respectively by increasing the output high-level signal.

[0041] Here, when the key electrical control circuit 120 receives the power-on signal of the key electrical switch, the key electrical control circuit 120 receives the power output of the battery power supply circuit 110 and supplies power to the microcontroller module 130; the microcontroller module 130 controls the post-processing circuit 140 and the vehicle power circuit 150 to be powered on respectively by increasing the level signals of the third output terminal of the microcontroller module 130 and the fourth output terminal of the microcontroller module 130, thereby powering on and starting the vehicle.

[0042] Furthermore, when the vehicle is powered off and shut down, the key electrical control circuit 120 receives the power-off signal of the key electrical switch and outputs a low-level signal to the microcontroller module to disconnect it; the microcontroller module 130 responds to the change of the input level signal by outputting a low-level signal to control the post-processing circuit 140 and the vehicle power circuit 150 to disconnect and power off, and controls the key electrical control circuit 120 to power off.

[0043] Here, when the key electrical control circuit 120 receives a power-off signal from the key electrical switch, the key electrical control circuit 120 reduces the level signal of the output of the key electrical control circuit 120; the microcontroller module 130 responds to the change of the level signal at the first input terminal, and controls the post-processing circuit 140 and the vehicle power circuit 150 to be powered off respectively by reducing the level signal at the third output terminal of the microcontroller module 130 and the fourth output terminal of the microcontroller module 130; the microcontroller module 130 responds to the power-off of the post-processing circuit 140 and the vehicle power circuit 150, and controls the key electrical control circuit 120 to be powered off by reducing the level signal at the second output terminal of the microcontroller module 130, thereby shutting down the vehicle.

[0044] Here, the microcontroller module 130 and the key electric control circuit 120 interact and cooperate with each other through level signals to realize the power-on and power-off control of the entire vehicle; the microcontroller module 130 is an independent microcontroller or reuses some pins and functions of the entire vehicle microcontroller.

[0045] The input and output of the microcontroller module 130 are connected to the pins of the relevant relays, a basic embedded control program is set in the microcontroller module 130, and the output ends of the microcontroller module 130 are connected to the control coils of the relays in the connected circuits.

[0046] For further information, see Figure 2 , Figure 2 This is a second structural diagram of a vehicle battery automatic start-stop control circuit provided in an embodiment of the present application. Figure 2 As shown in , the battery power supply circuit 110 includes: a battery 111 and a manual control switch 112.

[0047] Among them, the first end of the battery 111 is connected to the first end of the manual control switch 112; the second end of the manual control switch 112 is respectively connected to the first end of the key electric control circuit 120, the first end of the post-processing circuit 140 and the first end of the vehicle power circuit 150; the second end of the battery 111 is respectively connected to the second end of the key electric control circuit 120, the fifth end of the microcontroller module 130, the second end of the post-processing circuit 140 and the second end of the vehicle power circuit 150.

[0048] In one possible implementation of the present application, when the positive terminal (first end) of the battery 111 is connected to the manual control switch 112, the second end of the manual control switch 112 is the positive terminal of the battery power supply circuit 110, and the negative terminal of the battery 111 is the negative terminal of the battery power supply circuit 110; when the negative terminal (first end) of the battery 111 is connected to the manual control switch 112, the second end of the manual control switch 112 is the negative terminal of the battery power supply circuit 110, and the positive terminal of the battery 111 is the positive terminal of the battery power supply circuit 110.

[0049] Specifically, the battery 111 is a battery device installed in the vehicle, which provides power support for various circuits and electrical appliances in the control circuit 10; the manual control switch 112, that is, the main switch set in the vehicle, the manual control switch 112 is in the on state in the embodiment of the present application; wherein, when the control circuit of the embodiment of the present application cannot cut off the power of the entire vehicle, the power of the entire vehicle is cut off by disconnecting the manual control switch 112.

[0050] Further, such as Figure 2 As shown in , the key electric control circuit 120 includes: a key electric switch control circuit 121 and a key electric self-locking relay 122 .

[0051] Among them, the first end of the key electric switch control circuit 121 and the first end of the key electric self-locking relay 122 are respectively connected to the first end of the battery power supply circuit 110; the second end of the key electric switch control circuit 121 and the second end of the key electric self-locking relay 122 are respectively connected to the positive power supply terminal of the microcontroller module 130; the third end of the key electric switch control circuit 121 is connected to the first output end of the microcontroller module 130; the third end of the key electric self-locking relay 122 is connected to the second output end of the microcontroller module 130; the fourth end of the key electric switch control circuit 121 and the fourth end of the key electric self-locking relay 122 are respectively connected to the second end of the battery power supply circuit 110; the fifth end of the key electric switch control circuit 121 is connected to the first input end of the microcontroller module 130.

[0052] Here, the first and second ends of the key electric self-locking relay 122 are respectively the input and output ends of the relay normally open contact, and the third and fourth ends of the key electric self-locking relay 122 are respectively the positive and negative ends of the relay control coil.

[0053] Specifically, the power supply required by the microcontroller module 130 is connected to the battery 111 through a dual power supply circuit formed by the positive power supply terminal of the microcontroller module 130 connected to the key electric switch control circuit 121 and the key electric self-locking relay 122 to provide power support to the microcontroller module 130.

[0054] Among them, the battery 111, the manual control switch 112, the key electric switch control circuit 121 and the power pins of the microcontroller module 130 constitute the first power supply circuit of the microcontroller module 130; the battery 111, the manual control switch 112, the key electric self-locking relay 122 and the power pins of the microcontroller module 130 constitute the second power supply circuit of the microcontroller module 130.

[0055] For further information, see Figure 3 , Figure 3 This is a third structural diagram of a vehicle battery automatic start-stop control circuit provided in an embodiment of the present application. Figure 3 As shown in , the key electric switch control circuit 121 includes: a key electric switch 1211 and a key electric relay 1212 .

[0056] Among them, the first end of the key electric switch 1211 is connected to the first end of the battery power supply circuit 110; the second end of the key electric switch 1211 is respectively connected to the first end and the sixth end of the key electric relay 1212; the second end of the key electric relay 1212 is connected to the positive power supply terminal of the microcontroller module 130; the third end of the key electric relay 1212 is connected to the first output end of the microcontroller module 130; the fourth end of the key electric relay 1212 is connected to the second end of the battery power supply circuit 110; the fifth end of the key electric relay 1212 is connected to the first input end of the microcontroller module 130.

[0057] Here, the first end and the second end of the key electric relay 1212 are respectively the input end and the output end of the normally closed contact of the relay, the sixth end and the fifth end of the key electric relay 1212 are respectively the input end and the output end of the normally open contact of the relay, and the third end and the fourth end of the key electric relay 1212 are respectively the positive end and the negative end of the relay control coil.

[0058] Specifically, when the key electric switch 1211 is turned on, the first power supply circuit is energized and turned on; the microcontroller module 130 is powered on and executes the built-in power-on control logic program, the second output terminal of the microcontroller module 130 outputs a high-level signal, the coil of the key electric self-locking relay 122 is energized, the normally open contact of the key electric self-locking relay 122 is connected, and the second power supply circuit is energized and turned on. At this time, the microcontroller module 130 can obtain power support from the power supply circuits respectively formed by the key electric relay 1212 and the key electric self-locking relay 122.

[0059] Here, the key electrical relay 1212 can monitor the on / off status of the key electrical switch control circuit 121 by connecting the signal monitoring pin of the first input end of the microcontroller module 130; when the key is electrically connected, the first input end of the microcontroller module 130 is at a high level; when the key is electrically disconnected, the first input end of the microcontroller module 130 is at a low level.

[0060] Furthermore, when the post-processing circuit 140 is powered off, the level signal of the first output terminal of the microcontroller module 130 changes from a high level to a low level, the coil of the key electric relay 1212 is powered off, the normally closed node of the key electric relay 1212 changes from open to closed, and the normally open contact of the key electric relay 1212 changes from connected to open; the microcontroller module 130 executes the built-in power-off control logic program, and the level signal of the second output terminal of the microcontroller module 130 changes from a high level to a low level, controlling the coil of the key electric self-locking relay 122 to be powered off, the normally open contact of the key electric self-locking relay 122 changes from closed to open, and the second power supply line of the microcontroller module 130 is disconnected, so that the microcontroller module 130 is powered off, completing the power-off shutdown of the vehicle.

[0061] Further, such as Figure 2 As shown in , the post-processing circuit 140 includes: a post-processing delay relay 141 and a post-processing system module 142:

[0062] Among them, the first end of the post-processing delay relay 141 is connected to the first end of the battery power supply circuit 110; the second end of the post-processing delay relay 141 is connected to the first end of the post-processing system module 142; the third end of the post-processing delay relay 141 is connected to the fourth output end of the microcontroller module 130; the fourth end of the post-processing delay relay 141 and the second end of the post-processing system module 142 are respectively connected to the second end of the battery power supply circuit 110.

[0063] Here, the first end and the second end of the post-processing delay relay 141 are respectively the input end and the output end of the normally open contact of the relay, and the third end and the fourth end of the post-processing delay relay 141 are respectively the positive end and the negative end of the relay control coil; the first end and the second end of the post-processing system module 142 are respectively the positive end and the negative end of the post-processing system module 142 when powered.

[0064] Specifically, since the vehicle's National IV engines are all equipped with a post-processing system module 142, the post-processing system module 142 requires that the vehicle's engine can only be turned off after a certain period of time has passed after being turned off; wherein, the post-processing delay relay 141 is independent of the power relay provided in the vehicle, and the post-processing delay relay 141 can delay the power-off of the vehicle under the control of the microcontroller module 130.

[0065] Here, when the vehicle is powered on, the microcontroller module 130 outputs a high-level signal at the fourth output terminal to control the closure of the coil of the delay relay 141 to provide support for the vehicle's power-on start; when the vehicle is powered off and shut down, after a certain period of time has passed since the coil of the main switch relay 151 was powered off, the microcontroller module 130 outputs a low-level signal at the fourth output terminal to control the post-processing circuit 140 to power off.

[0066] Further, such as Figure 2 As shown in , the vehicle power circuit 150 includes: a main switch relay 151 and a vehicle power module 152 .

[0067] Among them, the first end of the main switch relay 151 is connected to the first end of the battery power supply circuit 110; the second end of the main switch relay 151 is connected to the first end of the vehicle power module 152; the third end of the main switch relay 151 is connected to the third output end of the microcontroller module 130; the fourth end of the main switch relay 151 and the second end of the vehicle power module 152 are respectively connected to the second end of the battery power supply circuit 110. Here, the first end and the second end of the main switch relay 151 are respectively the input end and the output end of the normally open contact of the relay, the third end and the fourth end of the main switch relay 151 are respectively the positive end and the negative end of the relay control coil; the first end and the second end of the vehicle power module 152 are respectively the positive end and the negative end of the vehicle power module 152 when supplying power.

[0068] Specifically, when the vehicle is powered on and started, the microcontroller module 130 controls the coil of the main switch relay 151 to close by outputting a high level signal at the third output terminal, thereby completing the power-on and starting of the vehicle.

[0069] Furthermore, when the vehicle is powered off and shut down, the microcontroller module 130 controls the coil of the main switch relay 151 to be powered off by outputting a low-level signal at the third output terminal, thereby powering off the entire vehicle circuit of the vehicle.

[0070] For further information, see Figure 4 , Figure 4 This is a schematic diagram of the structure of a vehicle power module provided in an embodiment of the present application. Figure 4 As shown in , the vehicle power module 152 includes: a vehicle power relay 1521 , a power load 1523 and a power protection circuit 1522 .

[0071] Among them, the first end of the vehicle electric relay 1521 and the first end of the power protection circuit 1522 are respectively connected to the second end of the main switch relay 151; the second end of the vehicle electric relay 1521 is connected to the first end of the power load 1523; the fourth end of the vehicle electric relay 1521, the second end of the power load 1523 and the second end of the power protection circuit 1522 are respectively connected to the second end of the battery power supply circuit 110.

[0072] Here, the first end and the second end of the vehicle electrical relay 1521 are respectively the input end and the output end of the relay's normally open contact, the third end and the fourth end of the vehicle electrical relay 1521 are respectively the positive end and the negative end of the relay control coil; the first end and the second end of the electrical load 1523 are respectively the positive end and the negative end of the electrical load 1523 when power is supplied.

[0073] Furthermore, the vehicle electric relay 1521 includes a plurality of independent power supply relays connected in parallel.

[0074] The first end and the second end of the vehicle electrical relay are the input end and the output end of the relay normally open contact, and the third end and the fourth end are the positive end and the negative end of the relay control coil; the first end and the second end of the vehicle electrical load are the positive end and the negative end of the vehicle electrical load power supply.

[0075] Specifically, after the key electrical control circuit 120 is powered on, the coil of each independent power supply relay is energized to power on the entire vehicle; wherein, each independent power supply relay is independently controlled by the microcontroller module 130 to be turned on and off. In addition, according to the equipment requirements of the vehicle, for example, in cases of delayed power-on and delayed power-off, the power supply start and stop of the vehicle equipment can be independently controlled, including the post-processing delay relay 141, the vehicle heater and the vehicle air conditioner, which can all be independently controlled.

[0076] Further, such as Figure 4 As shown in , the power protection circuit 1522 includes: a power protection module 15221 and a battery diagnosis module 15222 .

[0077] The power protection module 15221 is arranged in the power supply circuit corresponding to the vehicle power module 152; the first end of the battery diagnosis module 15222 is connected to the second end of the main switch relay 151; the second input of the battery diagnosis module 15222 is connected to the second end of the battery power supply circuit 110. Specifically, the power protection module 15221 provides a circuit protection function that can realize automatic control for the main branch power supply circuit in the vehicle, for example, monitoring the vehicle current and voltage. When the current of the power supply circuit is detected to be abnormal, and when the power supply circuit has a short circuit or an open circuit or other faults, the power protection module 15221 can promptly alarm and cut off the power supply until the fault is restored, and the power protection module 15221 resumes power supply.

[0078] Furthermore, the battery diagnostic module 15222 is a detection module provided on the power supply circuit of the vehicle. The battery diagnostic module 15222 detects and diagnoses the capacity, current, voltage, etc. of the battery, and determines the battery failure in real time and issues an alarm for the signs of battery failure, thereby improving the operating efficiency of the circuit in the vehicle.

[0079] Further, such as Figure 4 As shown in , the power protection module 15221 includes a current detection module 152211 and a voltage detection module 152212 .

[0080] Among them, the current detection module 152211 is connected in series in the power supply circuit corresponding to the vehicle power module 152; and the voltage detection module 152212 is connected in parallel at both ends of the power supply circuit.

[0081] Specifically, the output signals of the current detection module 152211 and the voltage detection module 152212 interact with the microcontroller module 130. When current or voltage abnormalities occur, an alarm is sent to the microcontroller module 130, and the microcontroller module 130 cuts off the relay of the corresponding circuit according to the alarm signal.

[0082] A control circuit for automatic start and stop of a vehicle battery is provided in an embodiment of the present application, and the control circuit includes: the battery power supply circuit is respectively connected to the key power control circuit, the microcontroller module, the post-processing circuit and the vehicle power circuit; the microcontroller module is respectively connected to the key power control circuit, the post-processing circuit and the vehicle power circuit; when the vehicle is powered on, the key power control circuit receives a power-on signal of a key single switch and provides a power output of the battery power supply circuit to the microcontroller module; the microcontroller module controls the post-processing circuit and the vehicle power circuit to be powered on respectively by increasing the output level signal; when the vehicle is powered off and shut down, the key power control circuit receives a power-off signal of a key power switch and reduces the output level signal; in response to the reduction of the input level signal, the microcontroller module controls the post-processing circuit and the vehicle power circuit to be disconnected and powered off respectively by reducing the output level signal, and controls the key power control circuit to be powered off.

[0083] In this way, compared with the circuit in the prior art that directly controls the start and stop of the vehicle battery by the main switch, so that some electrical devices of the vehicle are not controlled by turning the key, by adding a relay in the key electrical circuit, the electrical signal interaction between the microcontroller module and the key electrical circuit is realized, and at the same time, only the main switch for emergency start and stop is retained, and the function of manual switch to control the start and stop of the vehicle is cancelled. The level signal of the key electrical control circuit is controlled by turning the key switch to perform automatic start and stop control for the vehicle battery. In general, for vehicles equipped with post-processing delay relays, the vehicle power can be directly controlled to be cut off by the key electricity, which improves the control efficiency of the vehicle start and stop, and thereby improves the user experience of vehicle start and stop.

[0084] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the circuits, systems and units described above can refer to the corresponding processes in the aforementioned embodiments and will not be repeated here.

[0085] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A vehicle battery automatic start and stop control circuit, characterized in that: The control circuit includes: a battery power supply circuit, a key power control circuit, a microcontroller module, a post-processing circuit and a vehicle power circuit: The battery power supply circuit is respectively connected to the key electric control circuit, the microcontroller module, the post-processing circuit and the vehicle power circuit; the microcontroller module is respectively connected to the key electric control circuit, the post-processing circuit and the vehicle power circuit; When the vehicle is powered on, the key electric control circuit receives the power-on signal of the key electric switch and provides the power output of the battery power supply circuit to the microcontroller module; the microcontroller module controls the post-processing circuit and the vehicle power circuit to be powered on respectively by outputting a high-level signal; When the vehicle is powered off and shut down, the key electrical control circuit receives the power-off signal of the key electrical switch and outputs a high-level signal to the microcontroller module; the microcontroller module responds to the change of the input level signal by outputting a low-level signal to control the post-processing circuit and the vehicle power circuit to disconnect and power off, and controls the key electrical control circuit to power off.

2. The control circuit according to claim 1, characterized in that: The battery power supply circuit includes: a battery and a manual control switch: The first end of the battery is connected to the first end of the manual control switch; the second end of the manual control switch is respectively connected to the first end of the key electrical control circuit, the first end of the post-processing circuit and the first end of the vehicle electrical circuit; the second end of the battery is respectively connected to the second end of the key electrical control circuit, the fifth end of the microcontroller module, the second end of the post-processing circuit and the second end of the vehicle electrical circuit.

3. The control circuit according to claim 1, characterized in that: The key electric control circuit includes: a key electric switch control circuit and a key electric self-locking relay: The first end of the key electric switch control circuit and the first end of the key electric self-locking relay are respectively connected to the first end of the battery power supply circuit; the second end of the key electric switch control circuit and the second end of the key electric self-locking relay are respectively connected to the positive power supply terminal of the microcontroller module; the third end of the key electric switch control circuit is connected to the first output end of the microcontroller module; the third end of the key electric self-locking relay is connected to the second output end of the microcontroller module; the fourth end of the key electric switch control circuit and the fourth end of the key electric self-locking relay are respectively connected to the second end of the battery power supply circuit; the fifth end of the key electric switch control circuit is connected to the first input end of the microcontroller module.

4. The control circuit according to claim 3, characterized in that: The key electric switch control circuit comprises: a key electric switch and a key electric relay; The first end of the key electric switch is connected to the first end of the battery power supply circuit; the second end of the key electric switch is respectively connected to the first end and the sixth end of the key electric relay; the second end of the key electric relay is connected to the positive power supply terminal of the microcontroller module; the third end of the key electric relay is connected to the first output end of the microcontroller module; the fourth end of the key electric relay is connected to the second end of the battery power supply circuit; and the fifth end of the key electric relay is connected to the first input end of the microcontroller module.

5. The control circuit according to claim 1, characterized in that: The post-processing circuit includes: a post-processing delay relay and a post-processing system module: The first end of the post-processing delay relay is connected to the first end of the battery power supply circuit; the second end of the post-processing delay relay is connected to the first end of the post-processing system module; the third end of the post-processing delay relay is connected to the fourth output end of the microcontroller module; the fourth end of the post-processing delay relay and the second end of the post-processing system module are respectively connected to the second end of the battery power supply circuit.

6. The control circuit according to claim 1, characterized in that: The vehicle power circuit includes: a main switch relay and a vehicle power module: The first end of the main switch relay is connected to the first end of the battery power supply circuit; the second end of the main switch relay is connected to the first end of the vehicle power module; the third end of the main switch relay is connected to the third output end of the microcontroller module; the fourth end of the main switch relay and the second end of the vehicle power module are respectively connected to the second end of the battery power supply circuit.

7. The control circuit according to claim 6, characterized in that: The vehicle power module includes: a vehicle power relay, a power load and a power protection circuit The first end of the vehicle electric relay and the first end of the power protection circuit are respectively connected to the second end of the main switch relay; the second end of the vehicle electric relay is connected to the first end of the power load; the fourth end of the vehicle electric relay, the second end of the power load and the second end of the power protection circuit are respectively connected to the second end of the battery power supply circuit.

8. The control circuit according to claim 7, characterized in that: The vehicle electric relay includes a plurality of independent power supply relays connected in parallel.

9. The control circuit according to claim 7, characterized in that: The power protection circuit includes: a power protection module and a battery diagnosis module: The power protection module is arranged in the power supply circuit corresponding to the vehicle power module; the first end of the battery diagnosis module is connected to the second end of the main switch relay; the second input of the battery diagnosis module is connected to the second end of the battery power supply circuit.

10. The control circuit according to claim 9, characterized in that: The power protection module includes a current detection module and a voltage detection module: The current detection module is connected in series in the power supply circuit corresponding to the vehicle power module; the voltage detection module is connected in parallel at both ends of the power supply circuit.

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