Multifunctional vehicle-mounted composite power supply system

Abstract

The utility model relates to a kind of multifunctional vehicle-mounted composite power supply system, comprising: charging controller, for being connected with vehicle-mounted battery;The charging controller includes charging power supply and filter circuit, the charging power supply is connected with the filter circuit, the filter circuit is connected with the vehicle-mounted battery;Super capacitor, with DC / DC converter series connection, the DC / DC converter is parallelly connected with vehicle-mounted battery, for reducing voltage fluctuation of vehicle-mounted battery in charging process;Alarm module, for real-time monitoring the temperature and operating voltage of vehicle-mounted battery, when the temperature or operating voltage of vehicle-mounted battery is not in preset range, alarm is sent.The utility model can effectively buffer large current impact by super capacitor in series between battery and load, and cooperate DC / DC converter, reduce voltage fluctuation in charging and power consumption process, guarantee the stable work of vehicle-mounted electronic equipment, improve the electrical performance of vehicle as a whole.

Description

Technical Field

[0001] This utility model relates to the field of vehicle power technology, and in particular to a multifunctional vehicle composite power system. Background Technology

[0002] With the continuous development of automotive electronics technology, on-board power systems are playing an increasingly important role in providing stable power to vehicle electronic devices and ensuring normal vehicle operation. Traditional on-board power systems mainly rely on lead-acid batteries for power supply. However, with the increase in vehicle electrical load and the higher requirements for vehicle electrical performance, traditional battery power supply methods are no longer sufficient to meet the diverse needs of modern automobiles. For example, under conditions of frequent start-stop of high-power equipment, peak power consumption, or instantaneous high load, battery voltage fluctuations are prone to occur, affecting the normal operation of electrical equipment and even impacting the battery's lifespan. Furthermore, if the battery operates in high or low temperature environments, or if its operating voltage is abnormal, it can easily lead to safety hazards and pose certain risks.

[0003] In existing technologies, some vehicle power systems have achieved charging control and safety protection for batteries. However, they generally suffer from drawbacks such as complex structure, high cost, and low functional integration, making it difficult to achieve comprehensive protection and management of the battery while ensuring the power system's high efficiency and stability. Therefore, how to provide a multifunctional vehicle power system that is simple in structure, complete in function, can efficiently buffer current surges, and monitor battery status in real time has become an urgent technical problem to be solved in this field. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model embodiment is to provide a multifunctional vehicle-mounted composite power supply system.

[0005] A multifunctional vehicle-mounted composite power system, comprising:

[0006] A charging controller for connecting to a vehicle battery; the charging controller includes a charging power supply and a filtering circuit, the charging power supply being connected to the filtering circuit, and the filtering circuit being connected to the vehicle battery;

[0007] A supercapacitor, connected in series with a DC / DC converter, which is connected in parallel with the vehicle battery, is used to reduce voltage fluctuations of the vehicle battery during charging.

[0008] The alarm module is used to monitor the temperature and operating voltage of the vehicle battery in real time. When the temperature or operating voltage of the vehicle battery is outside the preset range, an alarm will be issued.

[0009] Preferably, the DC / DC converter includes:

[0010] A first capacitor C1 is connected at one end to the first terminal of a first switching transistor Q1 and at the other end to the second terminal of the first switching transistor Q1; the control terminal of the first switching transistor Q1 is connected to the PWM control module.

[0011] The first diode D1 has its anode connected to the first terminal of the first switching transistor Q1, and its cathode connected to the second terminal of the first switching transistor Q1.

[0012] The second switch Q2 has its first end connected to the second end of the first switch Q1, and its second end connected to the other end of the first capacitor C1.

[0013] The second diode D2 has its anode connected to the first terminal of the second switch Q2, and its cathode connected to the second terminal of the second switch Q2.

[0014] The second capacitor C2 has one end connected to the second terminal of the first switch Q1, and the other end connected to the second terminal of the second switch Q2.

[0015] Preferably, it further includes: a first inductor L1, one end of the first inductor L1 being connected to the first end of the first switch Q1, and the other end of the first inductor L1 being connected to one end of the second capacitor C2.

[0016] Preferably, the filter circuit includes:

[0017] Fuse F1, one end of which is connected to the charging power supply, and the other end of which is connected to one end of the third capacitor C3; the other end of the third capacitor C3 is connected to one end of the fourth capacitor C4;

[0018] The fifth capacitor C5, one end of which is connected to one end of the third capacitor C3, and the other end of which is connected to the other end of the fourth capacitor C4;

[0019] The first resistor R1 is connected to one end of the fifth capacitor C5, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to the other end of the fifth capacitor C5.

[0020] A varistor R3, one end of which is connected to one end of a first resistor R1, and the other end of which is connected to the other end of a second resistor R2;

[0021] A common-mode inductor L2 is provided, with its first terminal connected to one end of the varistor R3 and its second terminal connected to the other end of the varistor R3. The third and fourth terminals of the common-mode inductor L2 are used to connect to the shock protection circuit.

[0022] Preferably, the shock-resistant circuit includes:

[0023] The sixth capacitor C6 has one end connected to one end of the relay switch K, and the other end of the relay switch K is used to connect to the vehicle battery.

[0024] A thermistor R4 is provided, with one end of the thermistor R4 connected to one end of the relay switch K, and the other end of the thermistor R4 connected to the other end of the relay switch K.

[0025] Preferably, the other end of the sixth capacitor C6 is used to connect to the vehicle battery.

[0026] Preferably, the shock-resistant circuit further includes:

[0027] The relay control module is connected to the relay switch K. When the resistance of the thermistor R4 is less than the preset value, the relay control module controls the relay switch K to close.

[0028] Preferably, the alarm module includes:

[0029] A temperature sensor is installed on the vehicle battery to collect the temperature of the vehicle battery.

[0030] Voltage acquisition sensor, used to acquire the operating voltage of vehicle battery;

[0031] The microcontroller is connected to the temperature sensor, voltage acquisition sensor, and buzzer respectively. When the temperature or operating voltage of the vehicle battery is outside the preset range, it controls the buzzer to sound an alarm.

[0032] According to the specific embodiments provided by this utility model, the following technical effects are disclosed:

[0033] This utility model relates to a multifunctional vehicle-mounted composite power supply system. Compared with the prior art, this utility model can effectively buffer large current surges, reduce voltage fluctuations during charging and power consumption, ensure the stable operation of vehicle-mounted electronic equipment, and improve the overall electrical performance of the vehicle by connecting a supercapacitor in series between the battery and the load and cooperating with a DC / DC converter.

[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A diagram of a multifunctional vehicle-mounted composite power supply system provided by this utility model;

[0037] Figure 2 The circuit diagram of the DC / DC converter provided by this utility model;

[0038] Figure 3 The filter circuit diagram provided by this utility model. Detailed Implementation

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Please see Figure 1A multifunctional vehicle-mounted composite power system, comprising:

[0043] A charging controller for connecting to a vehicle battery; the charging controller includes a charging power supply and a filtering circuit, the charging power supply being connected to the filtering circuit, and the filtering circuit being connected to the vehicle battery;

[0044] A supercapacitor, connected in series with a DC / DC converter, which is connected in parallel with the vehicle battery, is used to reduce voltage fluctuations of the vehicle battery during charging.

[0045] The alarm module is used to monitor the temperature and operating voltage of the vehicle battery in real time. When the temperature or operating voltage of the vehicle battery is outside the preset range, an alarm will be issued.

[0046] For further details, please refer to Figure 2 The DC / DC converter includes:

[0047] A first capacitor C1 is connected at one end to the first terminal of a first switching transistor Q1 and at the other end to the second terminal of the first switching transistor Q1; the control terminal of the first switching transistor Q1 is connected to the PWM control module.

[0048] The first diode D1 has its anode connected to the first terminal of the first switching transistor Q1, and its cathode connected to the second terminal of the first switching transistor Q1.

[0049] The second switch Q2 has its first end connected to the second end of the first switch Q1, and its second end connected to the other end of the first capacitor C1.

[0050] The second diode D2 has its anode connected to the first terminal of the second switch Q2, and its cathode connected to the second terminal of the second switch Q2.

[0051] The second capacitor C2 has one end connected to the second terminal of the first switch Q1, and the other end connected to the second terminal of the second switch Q2.

[0052] The first inductor L1 has one end connected to the first terminal of the first switch Q1, and the other end connected to one terminal of the second capacitor C2.

[0053] The supercapacitor is first connected in series with the DC / DC converter, and then in parallel with the vehicle battery, which is directly connected to the DC bus. The biggest advantage of this structure is that the supercapacitor shares the instantaneous high current load of the battery, effectively reducing the probability of frequent charging and discharging and deep discharging of the battery, thereby extending the battery's lifespan and slowing down its performance degradation.

[0054] For further details, please refer to Figure 3 The filtering circuit includes:

[0055] Fuse F1, one end of which is connected to the charging power supply, and the other end of which is connected to one end of the third capacitor C3; the other end of the third capacitor C3 is connected to one end of the fourth capacitor C4;

[0056] The fifth capacitor C5, one end of which is connected to one end of the third capacitor C3, and the other end of which is connected to the other end of the fourth capacitor C4;

[0057] The first resistor R1 is connected to one end of the fifth capacitor C5, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to the other end of the fifth capacitor C5.

[0058] A varistor R3, one end of which is connected to one end of a first resistor R1, and the other end of which is connected to the other end of a second resistor R2;

[0059] A common-mode inductor L2 is provided, with its first terminal connected to one end of the varistor R3 and its second terminal connected to the other end of the varistor R3. The third and fourth terminals of the common-mode inductor L2 are used to connect to the shock protection circuit.

[0060] To suppress differential-mode signal interference in the circuit, capacitors C5 and C6 were added. Together with common-mode inductor L2, they form a differential-mode filter circuit. Differential-mode signal interference has a loop here, which will not pollute the external power supply and can also prevent the input of external differential-mode signals.

[0061] The sixth capacitor C6 has one end connected to one end of the relay switch K, and the other end of the relay switch K is used to connect to the vehicle battery.

[0062] A thermistor R4 is provided, with one end of the thermistor R4 connected to one end of the relay switch K, and the other end of the thermistor R4 connected to the other end of the relay switch K.

[0063] The relay control module is connected to the relay switch K. When the resistance of the thermistor R4 is less than the preset value, the relay control module controls the relay switch K to close.

[0064] To limit the large instantaneous current during startup, a thermistor R4 is introduced into the circuit. When

[0065] Once the bus voltage in the circuit increases and stabilizes, relay K1 will activate, allowing current to flow through the relay to power the battery.

[0066] It should be noted that the alarm module includes:

[0067] A temperature sensor is installed on the vehicle battery to collect the temperature of the vehicle battery.

[0068] Voltage acquisition sensor, used to acquire the operating voltage of vehicle battery;

[0069] A microcontroller is connected to a temperature sensor, a voltage sensor, and a buzzer. When the temperature or operating voltage of the vehicle battery is outside the preset range, it controls the buzzer to sound an alarm. By monitoring key battery safety parameters and providing proactive alarms, it can effectively prevent battery damage, vehicle malfunctions, and even fires caused by overheating, overcharging, or over-discharging, significantly improving the safety and reliability of the vehicle's power supply system.

[0070] This invention effectively buffers large current surges by connecting a supercapacitor in series between the battery and the load, and in conjunction with a DC / DC converter, thereby reducing voltage fluctuations during charging and power consumption, ensuring the stable operation of on-board electronic equipment, and improving the overall electrical performance of the vehicle.

[0071] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multifunctional vehicle-mounted composite power supply system, characterized in that, include: A charging controller for connecting to a vehicle battery; the charging controller includes a charging power supply and a filtering circuit, the charging power supply being connected to the filtering circuit, and the filtering circuit being connected to the vehicle battery; The filtering circuit includes: A fuse (F1) is connected at one end to a charging power source and at the other end to one end of a third capacitor (C3); the other end of the third capacitor (C3) is connected to one end of a fourth capacitor (C4). The fifth capacitor (C5) has one end connected to one end of the third capacitor (C3), and the other end connected to the other end of the fourth capacitor (C4). The first resistor (R1) has one end connected to one end of the fifth capacitor (C5), and the other end of the first resistor (R1) is connected to one end of the second resistor (R2), and the other end of the second resistor (R2) is connected to the other end of the fifth capacitor (C5). A varistor (R3), one end of which is connected to one end of a first resistor (R1), and the other end of which is connected to the other end of a second resistor (R2); A common-mode inductor (L2) has its first terminal connected to one terminal of the varistor (R3), and its second terminal connected to the other terminal of the varistor (R3); the third and fourth terminals of the common-mode inductor (L2) are used to connect to an anti-shock circuit. The shock-resistant circuit includes: The sixth capacitor (C6) has one end connected to one end of the relay switch (K), and the other end of the relay switch (K) is used to connect to the vehicle battery. A thermistor (R4), one end of which is connected to one end of a relay switch (K), and the other end of which is connected to the other end of a relay switch (K); The other end of the sixth capacitor (C6) is used to connect to the vehicle battery; The relay control module is connected to the relay switch (K). When the resistance of the thermistor (R4) is less than the preset value, the relay control module controls the relay switch (K) to close. A supercapacitor, connected in series with a DC / DC converter, which is connected in parallel with the vehicle battery, is used to reduce voltage fluctuations of the vehicle battery during charging. The alarm module is used to monitor the temperature and operating voltage of the vehicle battery in real time. When the temperature or operating voltage of the vehicle battery is outside the preset range, an alarm will be issued.

2. The multifunctional vehicle-mounted composite power supply system according to claim 1, characterized in that, The DC / DC converter includes: A first capacitor (C1) is connected at one end to the first terminal of a first switching transistor (Q1) and at the other end to the second terminal of the first switching transistor (Q1). The control terminal of the first switching transistor (Q1) is connected to the PWM control module. The first diode (D1) has its anode connected to the first terminal of the first switching transistor (Q1) and its cathode connected to the second terminal of the first switching transistor (Q1). The second switch (Q2) has its first terminal connected to the second terminal of the first switch (Q1), and its second terminal connected to the other terminal of the first capacitor (C1). The second diode (D2) has its anode connected to the first terminal of the second switch (Q2) and its cathode connected to the second terminal of the second switch (Q2). The second capacitor (C2) has one end connected to the second end of the first switch (Q1), and the other end connected to the second end of the second switch (Q2).

3. The multifunctional vehicle-mounted composite power supply system according to claim 2, characterized in that, Also includes: The first inductor (L1) has one end connected to the first terminal of the first switch (Q1), and the other end of the first inductor (L1) is connected to one end of the second capacitor (C2).

4. The multifunctional vehicle-mounted composite power supply system according to claim 1, characterized in that, The alarm module includes: A temperature sensor is installed on the vehicle battery to collect the temperature of the vehicle battery. Voltage acquisition sensor, used to acquire the operating voltage of vehicle battery; The microcontroller is connected to the temperature sensor, voltage acquisition sensor, and buzzer respectively. When the temperature or operating voltage of the vehicle battery is outside the preset range, it controls the buzzer to sound an alarm.

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