Storage battery automatic charging control system of automobile equipment

Abstract

The utility model discloses a storage battery automatic charging control system of automobile equipment, which comprises a storage battery, an automatic charging control module, a power supply module and a charging switch module, the automatic charging control module comprises a first control circuit and a charging circuit, the power supply module is connected to the control end of the first control circuit, and the charging switch module is connected to the control end of the charging circuit. The input end of the charging circuit is connected with the control end of the first control circuit, power supply connection and disconnection between the power supply module and the charging circuit are controlled through the control end of the first control circuit, and the output end of the charging circuit is respectively connected with the positive electrode and the negative electrode of the storage battery; the storage battery, the first control circuit and the charging switch module are connected in series. According to the utility model, charging and disconnection of the storage battery can be controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of battery charging, in particular to an automatic charging control system for the battery of automotive equipment. Background Art

[0002] At present, when automotive equipment is powered on, it generally uses the power in the battery. If it is not charged by an external charger, the battery power will be used up quickly. If the battery is not charged in time, it is easy to cause battery damage. Therefore, it is very necessary to charge the battery in time to ensure sufficient battery power.

[0003] The existing conventional method for charging a battery is as follows: Charge by clamping two clips of a charger on both ends of the battery. Among them, the two clips of the charger are divided into a red clip and a black clip. The red clip (positive electrode) is connected to the positive electrode of the battery, and the black clip (negative electrode) is connected to the negative electrode of the battery, so as to realize the charging process of the battery. This method has the following disadvantages:

[0004] 1. Each time the battery of automotive equipment is charged, two clips of the charger need to be used to clamp both ends of the battery. During use, there may be a phenomenon of incorrect connection of the positive and negative electrodes. When the positive and negative electrodes of the battery of automotive equipment are incorrectly connected to the two clips of the charger, it will cause a short circuit in the circuit, resulting in battery damage and further causing a series of serious consequences;

[0005] 2. When charging, the power cord of the charger needs to be inserted into the mains power supply, and then the switch button on the charger is turned on. After charging, the switch button of the charger needs to be turned off, and the power cord of the charger is pulled out; the operation is relatively troublesome. Summary of the Utility Model

[0006] In view of this, the purpose of the present utility model is to provide an automatic charging control system for the battery of automotive equipment.

[0007] In order to achieve the above technical purpose, the technical solution adopted by the present utility model is as follows:

[0008] An automatic charging control system for the battery of automotive equipment, comprising: a battery, an automatic charging control module, a power supply module, and a charging switch module. The automatic charging control module includes a first control circuit and a charging circuit. The power supply module is connected to the control end of the first control circuit. The input end of the charging circuit is connected to the control end of the first control circuit. The power connection and disconnection between the power supply module and the charging circuit are controlled through the control end of the first control circuit. The output end of the charging circuit is respectively connected to the positive electrode and the negative electrode of the battery; the battery, the first control circuit, and the charging switch module are connected in series.

[0009] Further, the charging switch module includes a switch S1. When one end of the switch S1 is connected to the negative electrode of the storage battery, the positive electrode of the storage battery is connected to the input end of the first control circuit, and the output end of the first control circuit and the other end of the switch S1 are both grounded; when one end of the switch S1 is connected to the positive electrode of the storage battery, the other end of the switch S1 is connected to the input end of the first control circuit, and the output end of the first control circuit and the negative electrode of the storage battery are both grounded.

[0010] Further, the first control circuit includes a double-way normally open relay RL1. The double-way normally open relay RL1 includes a first coil CL1 and a double-way normally open contact NO1 which are connected to each other; one end of the double-way normally open contact NO1 is connected to the corresponding port of the power supply module, and the other end of the double-way normally open contact NO1 is connected to the corresponding port of the charging circuit; when one end of the switch S1 is connected to the negative electrode of the storage battery, one end of the first coil CL1 is grounded, and the other end of the first coil CL1 is connected to the positive electrode of the storage battery; when one end of the switch S1 is connected to the positive electrode of the storage battery, one end of the first coil CL1 is grounded, and the other end of the first coil CL1 is connected to the other end of the switch S1.

[0011] Further, the charging circuit includes a charger U1, and the model of the charger U1 is LRS-350-12; the L port of the charger U1 is connected to the normally open contact of the double-way normally open contact NO1 that is connected to the live wire of the power supply module, the N port of the charger U1 is connected to the normally open contact of the double-way normally open contact NO1 that is connected to the neutral wire of the power supply module, the V+ port of the charger U1 is connected to the positive electrode of the storage battery, and the V- port of the charger U1 is connected to the negative electrode of the storage battery.

[0012] Further, the automatic charging control module further includes a second control circuit, and the second control circuit is respectively connected to the output end of the charging circuit and the positive electrode of the storage battery.

[0013] Further, the second control circuit is a single-way normally open relay RL2. The single-way normally open relay RL2 includes a second coil CL2 and a single-way normally open contact NO2 which are connected to each other. One end of the second coil CL2 is connected to the V+ port of the charger U1, the other end of the second coil CL2 is grounded, one end of the single-way normally open contact NO2 is connected to the V+ port of the charger U1, and the other end of the single-way normally open contact NO2 is connected to the positive electrode of the storage battery.

[0014] Further, the second control circuit is a diode D1. The positive electrode of the diode D1 is connected to the V+ port of the charger U1, and the negative electrode of the diode D1 is connected to the positive electrode of the storage battery.

[0015] Further, the automatic charging control module further includes an alarm circuit, which includes an alarm unit and a driving unit. One end of the driving unit is grounded, and the other end of the driving unit is respectively connected to one end of the alarm unit and the positive electrode of the storage battery, and the other end of the alarm unit is connected to the positive electrode of the storage battery.

[0016] Further, the driving unit includes a PNP triode Q1, a resistor R1, a variable resistor R2, a resistor R3, a resistor R4, and a voltage regulator U2. The model of the voltage regulator U2 is TL431. One end of the resistor R1, the A pole of the voltage regulator U2, and the C pole of the PNP triode Q1 are all grounded. The R pole of the voltage regulator U2 is respectively connected to the other end of the resistor R1 and one end of the variable resistor R2. The K pole of the voltage regulator U2 is respectively connected to one end of the resistor R3 and one end of the resistor R4. The B pole of the PNP triode Q1 is connected to the other end of the resistor R4. The E pole of the PNP triode Q1 is connected to one end of the alarm unit. The other end of the variable resistor R2 and the other end of the resistor R3 are both connected to the positive electrode of the storage battery.

[0017] Further, the alarm unit includes a buzzer LS1. One end of the buzzer LS1 is connected to the positive electrode of the storage battery, and the other end of the buzzer LS1 is connected to the E pole of the PNP triode Q1.

[0018] Adopting the above technical solution, compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. After closing the switch S1, the double-way normally open contacts NO1 of the double-way normally open relay RL1 and the single-way normally open contact NO2 of the single-way normally open relay RL2 are closed, and the loop between the charging circuit and the storage battery is conducted. During the process of charging the storage battery, the power supply module provides 220V commercial power for the charging circuit through the double-way normally open relay RL1, and the charging circuit receives and performs voltage conversion to charge the storage battery. During this charging process, since the charging circuit and the storage battery are connected by wires, and the connection method of the positive and negative electrodes of the storage battery is also designed in advance; without using the two clips of the charger to clamp both ends of the storage battery, the situation of incorrect connection of the positive and negative electrodes of the storage battery and the charger can be avoided;

[0020] 2. When charging is required, directly close the switch S1 connected to the negative electrode of the storage battery, and there is current passing through between the charging circuit and the storage battery, and charging is automatically started to ensure that the storage battery has sufficient power; when power-off is required, only directly open the switch S1 connected to the negative electrode of the storage battery, and there is no current passing through between the charging circuit and the storage battery, and power-off is automatically performed. Therefore, as long as the closing and opening states of the switch S1 are controlled in the structure of the present utility model, the automatic charging and power-off processes of the storage battery can be realized, without repeatedly plugging and unplugging the power cord of the charger, and the operation is relatively simple;

[0021] 3. When the switch S1 connected to the negative electrode of the storage battery is closed, a beeping sound of the buzzer LS1 is generated, and charging is automatically started at the same time to ensure that the storage battery has sufficient power. If the storage battery stops charging during the charging process, the buzzer LS1 will keep beeping, which can timely remind the user that a failure may occur during the charging process, so that the user can deal with it in time to ensure that the storage battery can be protected and used for a longer time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of an automatic charging control system for a storage battery of an automotive device provided in an embodiment of the present invention.

[0024] Figure 2 It is a specific circuit diagram showing the connection of the storage battery, the first control circuit, the charging circuit, the second control circuit, the alarm circuit, the power supply module, and the charging switch module in an embodiment of the present invention (wherein, the second control circuit uses a single-channel normally open relay RL2).

[0025] Figure 3 It is a specific circuit diagram showing the connection of the storage battery, the first control circuit, the charging circuit, the second control circuit, the alarm circuit, the power supply module, and the charging switch module in an embodiment of the present invention (wherein, the second control circuit uses a diode D1).

[0026] Figure 4 It is a schematic structural diagram showing that one end of the switch S1 in an embodiment of the present invention is connected to the positive electrode of the storage battery.

[0027] Figure 5 It is a schematic diagram showing the current conduction process after the switch S1 in an embodiment of the present invention is closed.

[0028] Figure 6 It is a schematic diagram showing the energization process of the second coil CL2 of the single-channel normally open relay RL2 in an embodiment of the present invention.

[0029] Figure 7 It is a schematic diagram showing that the single-channel normally open contact NO2 of the single-channel normally open relay RL2 in an embodiment of the present invention is closed to realize automatic charging of the storage battery.

[0030] Figure 8It is a schematic diagram of the triggering process of the buzzer LS1 after the switch S1 in the embodiment of the present utility model is closed and before the single-channel normally open contact NO2 of the single-channel normally open relay RL2 is closed.

[0031] Description of reference numerals in the figure:

[0032] 1 - storage battery, 2 - automatic charging control module, 21 - first control circuit, 22 - charging circuit, 23 - second control circuit, 24 - alarm circuit, 241 - alarm unit, 242 - driving unit, 3 - power supply module, 4 - charging switch module. Specific implementation manner

[0033] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present utility model, but do not limit the scope of the present utility model. Similarly, the following embodiments are only partial embodiments of the present utility model rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0034] Please refer to Figures 1-4 As shown, a battery automatic charging control system for an automotive device of the present utility model includes: a storage battery 1, an automatic charging control module 2, a power supply module 3, and a charging switch module 4. The automatic charging control module 2 includes a first control circuit 21 and a charging circuit 22. The power supply module 3 is connected to the control end of the first control circuit 21. The input end of the charging circuit 22 is connected to the control end of the first control circuit 21. The power connection and disconnection between the power supply module 3 and the charging circuit 22 are controlled through the control end of the first control circuit 21. The output end of the charging circuit 22 is respectively connected to the positive and negative electrodes of the storage battery 1. The storage battery 2, the first control circuit 21, and the charging switch module 4 are connected in series.

[0035] The present utility model realizes turning on the first control circuit 21 to provide the AC 220V power transmitted by the power supply module 3 to the charging circuit 22 when the automotive device is powered on by closing the switch of the charging switch module 4. After the charging circuit 22 obtains the AC 220V power, it inputs a DC 13.5V power to charge the storage battery 1. After the charging switch module 4 is turned off, the power between the power supply module 3 and the charging circuit 22 is disconnected through the first control circuit 21, and the charging circuit 22 cannot charge the storage battery 1.

[0036] In this embodiment, the charging switch module 4 includes a switch S1, as Figure 2As shown, when one end of the switch S1 is connected to the negative electrode of the storage battery 1, the positive electrode of the storage battery 1 is connected to the input end of the first control circuit 21, and the output end of the first control circuit 21 and the other end of the switch S1 are both grounded; as Figure 4 shown, when one end of the switch S1 is connected to the positive electrode of the storage battery 1, the other end of the switch S1 is connected to the input end of the first control circuit 21, and the output end of the first control circuit 21 and the negative electrode of the storage battery 1 are both grounded. The switch S1 is a high-power knife switch, and the start and stop of the first control circuit 21 are controlled by the closing and opening of the switch S1, so as to realize the conduction and cut-off between the charging circuit 22 and the storage battery 1, and complete the process of automatically charging or powering off the storage battery 1.

[0037] In this embodiment, the first control circuit 21 includes a double-way normally open relay RL1. The double-way normally open relay RL1 includes a first coil CL1 and a double-way normally open contact NO1 connected to each other. One end of the double-way normally open contact NO1 is connected to the corresponding port of the power supply module 3, and the other end of the double-way normally open contact NO1 is connected to the corresponding port of the charging circuit 22. When one end of the switch S1 is connected to the negative electrode of the storage battery 1, one end of the first coil CL1 is grounded, and the other end of the first coil CL1 is connected to the positive electrode of the storage battery 1. When one end of the switch S1 is connected to the positive electrode of the storage battery 1, one end of the first coil CL1 is grounded, and the other end of the first coil CL1 is connected to the other end of the switch S1. The double-way normally open contact NO1 is in an open state when the first coil CL1 is not powered on, resulting in no conduction between the double-way normally open relay RL1 and the power supply module 3. When the switch S1 is closed, the first coil CL1 is powered on, causing the double-way normally open contact NO1 to close and the double-way normally open relay RL1 to conduct with the power supply module 3. When the switch S1 is opened, the first coil CL1 loses power, causing the double-way normally open contact NO1 to open and the double-way normally open relay RL1 not to conduct with the power supply module 3. Therefore, the start and stop of the first control circuit 21 are controlled by the closing and opening of the switch S1, so as to realize whether the charging circuit 22 supplies power.

[0038] In this embodiment, the charging circuit 22 includes a charger U1, and the model of the charger U1 is LRS-350-12. The L port of the charger U1 is connected to the normally open contact of the double-way normally open contact NO1 that is connected to the live wire of the power supply module 3, the N port of the charger U1 is connected to the normally open contact of the double-way normally open contact NO1 that is connected to the neutral wire of the power supply module 3, the V+ port of the charger U1 is connected to the positive electrode of the storage battery 1, and the V- port of the charger U1 is connected to the negative electrode of the storage battery 1.

[0039] In this embodiment, the automatic charging control module 2 further includes a second control circuit 23, and the second control circuit 23 is respectively connected to the output end of the charging circuit 22 and the positive electrode of the storage battery 1. By providing the second control circuit between the charging circuit 22 and the storage battery 1, the power consumption of the output voltage of the charging circuit 22 can be reduced. The second control circuit 23 can adopt a single - path normally - open relay RL2 or a diode D1. The following is a detailed description of these two embodiments. Other embodiments with the same functions all fall within the protection scope of the present utility model.

[0040] Embodiment 1:

[0041] As Figure 2 shown, the second control circuit 23 is a single - path normally - open relay RL2. The single - path normally - open relay RL2 includes a second coil CL2 and a single - path normally - open contact NO2 which are connected to each other. One end of the second coil CL2 is connected to the V + port of the charger U1, the other end of the second coil CL2 is grounded, one end of the single - path normally - open contact NO2 is grounded, and the other end of the single - path normally - open contact NO2 is connected to the positive electrode of the storage battery 1. The single - path normally - open contact NO2 is in an open state when the second coil CL2 is not powered on, resulting in no conduction between the single - path normally - open relay RL2 and the charging circuit 22. When the switch S1 is closed, the second coil CL2 is powered on, causing the single - path normally - open contact NO2 to close. Through the single - path normally - open relay RL2, the charging circuit 22 is connected to the positive electrode of the storage battery 1 to charge the storage battery 1; when the switch S1 is opened, the second coil CL2 loses power, causing the single - path normally - open contact NO2 to open, disconnecting the charging circuit 22 from the storage battery 1, and the storage battery 1 is powered off. Therefore, by closing and opening the switch S1, the start and stop of the second control circuit 23 are controlled, thereby realizing whether the storage battery 1 is charged.

[0042] Embodiment 2:

[0043] As Figure 3 shown, the second control circuit 23 is a diode D1. The positive electrode of the diode D1 is connected to the V + port of the charger U1, and the negative electrode of the diode D1 is connected to the positive electrode of the storage battery. Using the diode D1 can reduce the power consumption of the output voltage of the charging circuit 22.

[0044] In this embodiment, the automatic charging control module 2 further includes an alarm circuit 24. The alarm circuit 24 includes an alarm unit 241 and a driving unit 242. One end of the driving unit 242 is grounded, and the other end of the driving unit 242 is respectively connected to one end of the alarm unit 241 and the positive electrode of the storage battery 1. The other end of the alarm unit 241 is connected to the positive electrode of the storage battery 1. The voltage of the driving unit 242 is adjusted through the closing and opening of the switch S1 and the faults during the charging process, and the opening and closing of the alarm unit 241 are driven by the voltage of the driving unit 242.

[0045] In this embodiment, the driving unit 242 includes a PNP triode Q1, a resistor R1, a variable resistor R2, a resistor R3, a resistor R4, and a voltage regulator U2. The voltage regulator U2 is a three-terminal shunt voltage regulator, and its model is TL431. One end of the resistor R1, the A pole of the voltage regulator U2, and the C pole of the PNP triode Q1 are all grounded. The R pole of the voltage regulator U2 is respectively connected to the other end of the resistor R1 and one end of the variable resistor R2. The K pole of the voltage regulator U2 is respectively connected to one end of the resistor R3 and one end of the resistor R4. The B pole of the PNP triode Q1 is connected to the other end of the resistor R4. The E pole of the PNP triode Q1 is connected to one end of the alarm unit 241. The other end of the variable resistor R2 and the other end of the resistor R3 are both connected to the positive electrode of the storage battery 1.

[0046] In this embodiment, the alarm unit 241 includes a buzzer LS1. One end of the buzzer LS1 is connected to the positive electrode of the storage battery 1, and the other end of the buzzer LS1 is connected to the E pole of the triode Q1.

[0047] Taking the second control circuit 23 using a single-channel normally open relay RL2 as an example, the working principle of the present invention is described. Its specific working principle is as follows:

[0048] After the switch S1 is closed, the current energizing process is as Figure 5 shown. At this time, the first coil CL1 of the double-channel normally open relay RL1 is energized, and the double-channel normally open contact NO1 is closed. The 220V alternating current provided by the power supply module 3 (mains electricity) is input to the charger U1 through the double-channel normally open contact NO1. After the charger U1 performs voltage conversion, it outputs a DC voltage of 13.5V. After the DC voltage output by the charger U1 reaches the operating voltage of the single-channel normally open relay RL2, the second coil CL2 of the single-channel normally open relay RL2 is energized, as Figure 6 shown; at this time, the single-channel normally open contact NO2 of the single-channel normally open relay RL2 is closed, realizing automatic charging of the storage battery 1, as Figure 7 shown.

[0049] After the switch S1 is closed and before the single-way normally open contact NO2 of the single-way normally open relay RL2 is closed, the storage battery 1 cannot be charged; as Figure 8 shown, at this time, the voltage at the negative electrode of the storage battery 1 is lower than 12.8 V, the voltage at point a where the resistor R1 and the resistor R2 are in series is lower than 2.495 V, the A pole and the K pole of the voltage regulator U2 are turned on, and there is current flowing through the B pole of the triode Q1, driving the triode Q1 to conduct, so that the buzzer LS1 emits a prompt sound.

[0050] After the single-way normally open contact NO2 of the single-way normally open relay RL2 is closed, the storage battery 1 is charged, the voltage at the negative electrode of the storage battery 1 is higher than 12.8 V, the voltage at point a where the resistor R1 and the resistor R2 are in series is higher than 2.495 V, the A pole and the K pole of the voltage regulator U2 are cut off, and the triode Q1 is also cut off, and the buzzer LS1 stops emitting a prompt sound.

[0051] When the switch S1 is disconnected, the first coil CL1 of the double-way normally open relay RL1 loses power, the double-way normally open contact NO1 is disconnected, the charger U1 stops outputting 13.5 V DC power, the second coil CL2 of the single-way normally open relay RL2 loses power, and the single-way normally open contact NO2 of the single-way normally open relay RL2 is disconnected, realizing automatic power-off of the storage battery 1.

[0052] During the charging process, if the voltage suddenly cuts off or there is a charging failure or other reasons resulting in non-charging, the voltage at the negative electrode of the storage battery 1 is lower than 12.8 V, the voltage at point a where the resistor R1 and the resistor R2 are in series is lower than 2.495 V, the A pole and the K pole of the voltage regulator U2 are turned on, and there is current flowing through the B pole of the triode Q1, driving the triode Q1 to conduct, so that the buzzer LS1 emits a prompt sound.

[0053] The utility model can be applied to the charging control of the storage battery 1 of automotive equipment. Since automotive equipment often needs to disconnect and connect the negative electrode of the storage battery 1 for measurement, the switch S1 of the utility model can realize the functions of disconnecting and connecting the negative electrode of the storage battery 1. At the same time, it can also realize automatically charging the storage battery 1 when the negative electrode of the storage battery 1 is connected, automatically disconnecting the charging of the storage battery 1 when the negative electrode of the storage battery 1 is disconnected, and there is a short-time buzzer LS1 prompt sound when the negative electrode of the storage battery 1 is connected. If the storage battery 1 cannot be charged after the negative electrode of the storage battery 1 is connected or the charging is abnormal during the charging process, the buzzer LS1 will continuously emit a prompt sound to remind the user to check.

[0054] The utility model realizes emitting a prompt sound of successful power-on when the negative electrode of the storage battery 1 of automotive equipment is connected and powered on successfully at extremely low cost, and automatically charges the storage battery 1 after power-on. When the storage battery 1 is disconnected, it automatically shuts down the charging of the storage battery 1, eliminating the need to repeatedly plug and unplug the power cord of the charger, and prolonging the service life of the storage battery 1.

[0055] The above are only some embodiments of the present utility model, and thus do not limit the protection scope of the present utility model. Any equivalent device or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included in the patent protection scope of the present utility model.

Claims

1. An automatic charging control system for the storage battery of an automotive device, characterized in that, Comprising: A storage battery, an automatic charging control module, a power supply module, and a charging switch module. The automatic charging control module includes a first control circuit and a charging circuit. The power supply module is connected to the control end of the first control circuit. The input end of the charging circuit is connected to the control end of the first control circuit. The power connection and disconnection between the power supply module and the charging circuit are controlled through the control end of the first control circuit. The output end of the charging circuit is respectively connected to the positive and negative electrodes of the storage battery. The storage battery, the first control circuit, and the charging switch module are connected in series.

2. The automatic charging control system for the storage battery of an automotive device according to claim 1, characterized in that, The charging switch module includes a switch S1. When one end of the switch S1 is connected to the negative electrode of the storage battery, the positive electrode of the storage battery is connected to the input end of the first control circuit, and the output end of the first control circuit and the other end of the switch S1 are both grounded. When one end of the switch S1 is connected to the positive electrode of the storage battery, the other end of the switch S1 is connected to the input end of the first control circuit, and the output end of the first control circuit and the negative electrode of the storage battery are both grounded.

3. The automatic charging control system for the storage battery of an automotive device according to claim 2, characterized in that, The first control circuit includes a double-way normally open relay RL1. The double-way normally open relay RL1 includes a first coil CL1 and a double-way normally open contact NO1 that are connected to each other. One end of the double-way normally open contact NO1 is connected to the corresponding port of the power supply module, and the other end of the double-way normally open contact NO1 is connected to the corresponding port of the charging circuit. When one end of the switch S1 is connected to the negative electrode of the storage battery, one end of the first coil CL1 is grounded, and the other end of the first coil CL1 is connected to the positive electrode of the storage battery. When one end of the switch S1 is connected to the positive electrode of the storage battery, one end of the first coil CL1 is grounded, and the other end of the first coil CL1 is connected to the other end of the switch S1.

4. The automatic charging control system for the storage battery of an automotive device according to claim 3, wherein, The charging circuit includes a charger U1, and the model of the charger U1 is LRS-350-12. The L port of the charger U1 is connected to the normally open contact in the double-way normally open contact NO1 that is connected to the live wire of the power supply module, the N port of the charger U1 is connected to the normally open contact in the double-way normally open contact NO1 that is connected to the neutral wire of the power supply module, the V+ port of the charger U1 is connected to the positive electrode of the storage battery, and the V- port of the charger U1 is connected to the negative electrode of the storage battery.

5. The automatic charging control system for the storage battery of an automotive device according to claim 4, characterized in that, The automatic charging control module further includes a second control circuit, and the second control circuit is respectively connected to the output end of the charging circuit and the positive electrode of the storage battery.

6. The automatic charging control system for the storage battery of an automotive device according to claim 5, wherein, The second control circuit is a single-way normally open relay RL2. The single-way normally open relay RL2 includes a second coil CL2 and a single-way normally open contact NO2 that are connected to each other. One end of the second coil CL2 is connected to the V+ port of the charger U1, the other end of the second coil CL2 is grounded, one end of the single-way normally open contact NO2 is connected to the V+ port of the charger U1, and the other end of the single-way normally open contact NO2 is connected to the positive electrode of the storage battery.

7. The automatic charging control system for the storage battery of an automotive device according to claim 5, wherein The second control circuit is diode D1. The positive electrode of the diode D1 is connected to the V+ port of the charger U1, and the negative electrode of the diode D1 is connected to the positive electrode of the storage battery.

8. The automatic charging control system for the storage battery of an automotive device according to claim 1, characterized in that, The automatic charging control module further includes an alarm circuit. The alarm circuit includes an alarm unit and a driving unit. One end of the driving unit is grounded, the other end of the driving unit is respectively connected to one end of the alarm unit and the positive electrode of the storage battery, and the other end of the alarm unit is connected to the positive electrode of the storage battery.

9. The automatic charging control system for the storage battery of an automotive device according to claim 8, characterized in that The driving unit includes a PNP triode Q1, a resistor R1, a variable resistor R2, a resistor R3, a resistor R4 and a voltage regulator U2. The model of the voltage regulator U2 is TL431. One end of the resistor R1, the A pole of the voltage regulator U2 and the C pole of the PNP triode Q1 are all grounded. The R pole of the voltage regulator U2 is respectively connected to the other end of the resistor R1 and one end of the variable resistor R2. The K pole of the voltage regulator U2 is respectively connected to one end of the resistor R3 and one end of the resistor R4. The B pole of the PNP triode Q1 is connected to the other end of the resistor R4. The E pole of the PNP triode Q1 is connected to one end of the alarm unit. The other end of the variable resistor R2 and the other end of the resistor R3 are both connected to the positive electrode of the storage battery.

10. The automatic charging control system for the storage battery of an automotive device according to claim 8, characterized in that, The alarm unit includes a buzzer LS1. One end of the buzzer LS1 is connected to the positive electrode of the storage battery, and the other end of the buzzer LS1 is connected to the E pole of the PNP triode Q1.

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