Powerful start control system of automobile battery

Abstract

The utility model discloses a strong start control system of an automobile battery, which is characterized in that when the voltage of the automobile battery is detected to be too low or the temperature is relatively low, the voltage is boosted through a boosting unit, and pulse current is provided through PWM (Pulse Width Modulation) control, so that the instantaneous discharge capability of the automobile battery is enhanced. According to the utility model, the automobile battery can be quickly charged under the condition that the voltage of the automobile battery is too low, and the voltage is increased, so that the automobile battery has the starting capability, thereby improving the starting success rate of an engine.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile battery management machine starting control, and particularly relates to a powerful starting control system for enhancing the starting capability of an automobile battery. BACKGROUND

[0002] In cold environments, long periods of non-use, or battery aging, the performance of the automobile battery can significantly decrease, making it difficult or even impossible to start the vehicle. This is mainly due to the following factors:

[0003] 1. When the temperature decreases, the viscosity of the electrolyte of the automobile battery increases, and the ion mobility decreases, resulting in an increase in the internal resistance of the battery and a decrease in the discharge capacity, so that sufficient starting current cannot be provided;

[0004] 2. If the automobile is not started for a long time, the self-discharge and static power consumption of the battery can cause its voltage to decrease. When the voltage is below a certain threshold, even if an emergency power supply is connected externally, the automobile battery may still be unable to provide sufficient instantaneous power to start the engine.

[0005] The automobile emergency power supplies currently on the market mainly adopt two working modes. One is a direct power supply mode, in which the emergency power supply is directly connected in parallel with the automobile battery to provide additional starting current. However, if the voltage of the automobile battery is extremely low (such as below 9V), the internal resistance will significantly increase, causing the external power supply to be unable to provide sufficient instantaneous current, and still failing to successfully start. The other is a buffer charging mode, in which the emergency power supply first charges the automobile battery and then attempts to start. However, in the case of low temperature or a severely discharged battery, the charging process is slow, which may delay the starting time or even fail to successfully start. SUMMARY

[0006] The application provides a powerful starting control system for an automobile battery, which can quickly charge the automobile battery when the voltage of the automobile battery is too low and increase the voltage of the automobile battery, so that the automobile battery has starting capability, thereby improving the success rate of starting the engine.

[0007] The powerful starting control system for an automobile battery provided by the application comprises:

[0008] a power supply unit;

[0009] a micro-processing unit;

[0010] a first MOS tube, an input end of the first MOS tube being connected to a positive pole of the power supply unit, an output end of the first MOS tube being connected to a positive pole of the automobile battery, and a negative pole of the automobile battery being connected to a negative pole of the power supply unit;

[0011] a first MOS tube driving unit, an input end of the first MOS tube driving unit being connected to an output end of the micro processing unit, and an output end of the first MOS tube driving unit being connected to a control end of the first MOS tube;

[0012] a boosting unit, an input end of the boosting unit being connected to a positive pole of the power supply unit;

[0013] a second MOS tube, an input end of the second MOS tube being connected to an output end of the boosting unit, and an output end of the second MOS tube being connected to a positive pole of the diode, and a negative pole of the diode being connected to a positive pole of the automobile battery;

[0014] a second MOS tube driving unit, an input end of the second MOS tube driving unit being connected to an output end of the micro processing unit, and an output end of the second MOS tube driving unit being connected to a control end of the second MOS tube;

[0015] a detecting unit, connected to the micro processing unit, for detecting voltage and current of the automobile battery.

[0016] Preferably, the second MOS tube driving unit comprises a PWM driving circuit with adjustable duty ratio and soft start function.

[0017] Preferably, the detecting unit comprises a voltage detecting unit, a current detecting unit, a first resistor, a second resistor, a third resistor and a fourth resistor, one end of the first resistor and one end of the second resistor are respectively connected to a positive pole of the automobile battery, the other end of the first resistor is connected to an output end of a reference power supply, the other end of the second resistor is connected to one end of the third resistor, the other end of the third resistor is grounded, an input end of the voltage detecting unit is connected between the second resistor and the third resistor, an output end of the voltage detecting unit is connected to an input end of the micro processing unit, the fourth resistor is connected in series between a negative pole of the automobile battery and a negative pole of the power supply unit, an input end of the current detecting unit is connected between the negative pole of the automobile battery and the fourth resistor, and an output end of the current detecting unit is connected to an input end of the micro processing unit.

[0018] Preferably, the strong start control system further comprises a filter unit, the filter unit being arranged between an output end of the second MOS tube and the diode, for filtering the PWM signal output by the second MOS tube.

[0019] Preferably, the filter unit comprises an inductor and a capacitor, the inductor being connected in series between the output end of the second MOS tube and the diode, one end of the capacitor being connected between the inductor and the diode, and the other end of the capacitor being grounded.

[0020] Preferably, the strong start control system further comprises a temperature sensing unit, the temperature sensing unit being used for detecting ambient temperature and sending a detection signal to the micro processing unit.

[0021] One or more technical solutions provided in the application have at least the following technical effects or advantages:

[0022] The boost unit can increase the charging voltage to 16V-18V, rapidly increase the voltage of the automobile battery in a short time, improve the starting success rate, and the application can detect the voltage and current of the automobile battery in real time, and feed back the data to the micro processing unit to adjust the charging strategy, when detecting that the battery voltage is too low or the current is too large, the micro processing unit can automatically adjust the charging power to prevent overcharging or overcurrent, and ensure the safety of the charging process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure schematic diagram of the strong starting control system of the embodiment one is shown in the figure.

[0024] Figure 2 The structure schematic diagram of the strong starting control system of the embodiment two is shown in the figure.

[0025] Figure 3 The structure schematic diagram of the strong starting control system of the embodiment three is shown in the figure. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below with reference to the accompanying drawings.

[0027] Embodiment one,

[0028] As shown in the figure, the strong starting control system of the automobile battery of the embodiment, includes a power supply unit 10, a micro processing unit 20, a first MOS tube Q1, a first MOS tube driving unit 30, a boost unit 80, a second MOS tube Q2, a second MOS tube driving unit 40 and a detection unit. Figure 1 The input end of the first MOS tube Q1 is connected to the positive pole of the power supply unit 10, the output end of the first MOS tube Q1 is connected to the positive pole of the automobile battery BAT, the negative pole of the automobile battery BAT is connected to the negative pole of the power supply unit 10, the first MOS tube Q1 is a P-channel MOS tube, the source of the first MOS tube Q1 is the input end, the drain of the first MOS tube Q1 is the output end, and the gate of the first MOS tube Q1 is the control end.

[0029] The input end of the first MOS tube driving unit 30 is connected to the output end of the micro processing unit 20, and the output end of the first MOS tube driving unit 30 is connected to the control end of the first MOS tube Q1, so that the micro processing unit 20 can control the on-off of the first MOS tube Q1 through the first MOS tube driving unit 30.

[0030]

[0031] ​The input end of the voltage boosting unit 80 is connected to the positive pole of the power supply unit 10, and the voltage boosting unit 80 is capable of boosting the output current of the power supply unit 10.

[0032] The input end of the second MOS tube Q2 is connected to the output end of the voltage boosting unit 80, the output end of the second MOS tube Q2 is connected to the positive pole of the diode D1, the negative pole of the diode D1 is connected to the positive pole of the automobile battery BAT, the second MOS tube Q2 is a P-channel MOS tube, the source of the second MOS tube Q2 is the input end, the drain of the second MOS tube Q2 is the output end, and the gate of the second MOS tube Q2 is the control end.

[0033] The input end of the second MOS tube driving unit 40 is connected to the output end of the micro processing unit 20, and the output end of the second MOS tube driving unit 40 is connected to the control end of the second MOS tube Q2, so that the micro processing unit 20 can control the on-off of the second MOS tube Q2 through the second MOS tube driving unit 40.

[0034] The detection unit is connected to the micro processing unit 20, and is used for detecting the voltage and current of the automobile battery BAT and sending the detection results to the micro processing unit 20.

[0035] The second MOS tube driving unit comprises a PWM driving circuit with adjustable duty ratio and soft start function.

[0036] The detection unit comprises a voltage detection unit 50, a current detection unit 60, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, one end of the first resistor R1 and one end of the second resistor R2 are respectively connected to the positive pole of the automobile battery BAT, the other end of the first resistor R1 is connected to the output end of the reference power supply 70, the other end of the second resistor R2 is connected to one end of the third resistor R3, the other end of the third resistor R3 is grounded, the input end of the voltage detection unit 50 is connected to the circuit between the second resistor R2 and the third resistor R3, the output end of the voltage detection unit 50 is connected to the input end of the micro processing unit 20, the fourth resistor R4 is connected in series between the negative pole of the automobile battery BAT and the negative pole of the power supply unit 10, the input end of the current detection unit 60 is connected to the circuit between the negative pole of the automobile battery BAT and the fourth resistor R4, and the output end of the current detection unit 60 is connected to the input end of the micro processing unit 20.

[0037] The voltage detection unit 50 comprises a digital-analog converter, the third resistor R3 and the second resistor R2 are used for voltage division of the input voltage of the automobile battery BAT, an analog voltage signal after voltage division is converted into a digital signal by an analog-digital converter, and the digital signal is transmitted to the MCU for processing, if it is detected that the voltage of the automobile battery BAT is lower than 9V, it is judged that the automobile battery BAT is in the power shortage state, and the boosting unit 80 needs to be started to supply power, if the voltage of the automobile battery BAT recovers to more than 12V, it can be judged that the charging is completed, and the boosting unit 80 is closed.

[0038] The current detection unit 60 is used for monitoring the charging current of the automobile battery BAT and transmitting to the micro processing unit 20, avoiding overcurrent, and judging the charging acceptance capacity of the automobile battery BAT.

[0039] Embodiment two,

[0040] As Figure 2 shown, the strong starting control system of the embodiment increases the filter unit 81 on the basis of the embodiment one, the filter unit 81 is arranged on the line between the output end of the second MOS tube Q2 and the anode of the diode D1, the filter unit 81 is used for filtering the PWM signal output by the second MOS tube Q2.

[0041] Specifically, the filter unit 81 comprises an inductor and a capacitor, the inductor is connected in series on the line between the output end of the second MOS tube Q2 and the anode of the diode D1, one end of the capacitor is connected on the line between the inductor and the anode of the diode D1, and the other end of the capacitor is grounded, that is to say, the filter unit 81 adopts an LC filter circuit, which can filter the PWM signal output by the second MOS tube Q2, improve the stability of the power supply and reduce electromagnetic interference.

[0042] Embodiment three,

[0043] As Figure 3 shown, the strong starting control system of the embodiment increases the temperature sensing unit 90 on the basis of the embodiment two, the temperature sensing unit 90 is used for detecting the ambient temperature and transmitting the detection signal to the micro processing unit 20, so that in the low temperature environment (such as below-20 DEG C), the charging capacity of the ordinary emergency power supply is significantly reduced, leading to starting difficulty, and the application can still quickly recover the automobile battery voltage in the low temperature environment by the combination mode of high voltage charging + PWM charging, and improve the starting capacity.

[0044] When starting the automobile engine, if the voltage of the automobile battery BAT is sufficient (such as >10V), the micro processing unit 20 directly controls the first MOS tube Q1 to be turned on, so that the power supply unit 10 of the emergency power supply charges the automobile battery BAT and supports starting.

[0045] If the car is in a low temperature environment of -10℃, the voltage of the car battery BAT drops to 10V, causing difficulty in starting, and the car emergency starting power supply, after detecting that the voltage of the car battery BAT is too low, starts the voltage boosting unit 80, raises the output voltage to 17V, and charges through the second MOS tube Q2 in PWM mode, so that the voltage of the car battery BAT rapidly rises to above 12V, thereby successfully completing the engine start;

[0046] If the car is not used for a long time, the voltage of the car battery BAT drops to 8V, and the car emergency starting power supply starts the charging mode, first pre-charges in a low current mode, and after the voltage of the car battery BAT rises to above 10V, switches to a high efficiency PWM charging mode, so that the voltage of the car battery BAT further rises to 12.5V, and ensures that the engine can be started normally.

[0047] The specification and drawings are merely exemplary of the present application and are to be regarded as covering all modifications, variations, combinations, or equivalents that fall within the scope of the present application. Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the application, modifications and variations of this application can be made by those skilled in the art upon the understanding of this detailed description, the preferred embodiments of the application having been presented as the best mode of practicing the application.

Claims

1. A powerful start control system for an automotive battery, characterized by, The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery. The application relates to a strong starting control system for a vehicle battery.

2. The system for forced start control of an automotive battery as claimed in claim 1 wherein, The application relates to a strong starting control system for a vehicle battery.

3. The system for forced start control of an automotive battery as claimed in claim 2 wherein, The application relates to a strong starting control system for a vehicle battery.

4. The system for forced start control of an automotive battery as claimed in claim 3 wherein, The application relates to a strong starting control system for a vehicle battery.

5. The system for forced start control of an automotive battery as claimed in claim 4 wherein, The application relates to a strong starting control system for a vehicle battery.

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