A control system for detecting and controlling abnormal high current during normal startup of automobile power supply

Abstract

The present invention discloses a normal start-up large current abnormal detection and control system for an automobile power supply, and relates to the technical field of automobile starting power supplies. In the present invention: a power management unit is electrically connected to a main battery of a starting power supply through a switch circuit; a drive control module drives and controls the on and off of the switch circuit; a Mosfet circuit is serially connected to the negative output line of the main battery of the starting power supply, and the drive control module drives and controls the on and off of the Mosfet circuit; an independent low-voltage circuit is electrically connected to the starting module, and the starting module transmits a starting signal to a main processing controller; the main processing controller compares the output voltage and current information of the starting power supply with a reference value, and according to the comparison information of the voltage and current, the main processing controller sends a corresponding drive control signal to the PCB inside the starting power supply. In the process of quality inspection of the starting power supply, the present invention reduces the degree of damage to the PCB caused by abnormal start-up, and also reduces the additional design of the power supply circuit.

Description

Technical Field

[0001] The invention relates to the technical field of automobile starting power supply, and in particular to an automobile power supply normal starting large current abnormality detection and control system. Background Art

[0002] The car starting power supply will generate a large current during the car starting process, and the voltage will also change greatly. After the car starting power supply is produced, it is necessary to conduct quality inspection on the car starting power supply. During the quality inspection, the corresponding car circuit can be simulated, and then the starting power supply can be connected to the simulated car circuit to simulate the car starting, and the starting current and voltage information generated by the starting power supply can be monitored to determine whether the starting power supply quality is qualified.

[0003] During the simulated quality inspection of the automobile starting power supply, if there is a problem inside the starting power supply, an abnormal current will be generated during the starting process, and at the same time, it will cause certain damage to the components inside the starting power supply [such as the PCB control board]. During the quality inspection of the starting power supply, reducing the degree of damage to the PCB caused by abnormal starting has become a problem that needs to be solved in the quality inspection of the automobile starting power supply. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a large current abnormality detection and control system for normal startup of an automobile power supply, thereby reducing the degree of damage to the PCB caused by abnormal startup during the quality inspection of the startup power supply.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The invention provides a detection and control system for abnormal large current during normal starting of an automobile power supply, comprising an automobile starting simulation circuit connected to a starting power supply, the starting power supply comprising an internal PCB, the automobile starting simulation circuit comprising a starting module, the detection and control system comprising a voltage detection module and a current detection module connected to the starting power supply, the PCB being provided with a power management unit and a switch circuit, the power management unit being electrically connected to a main battery of the starting power supply through the switch circuit; the PCB being provided with a drive control module, the power management module sending a control signal to the drive control module, the drive control module driving and controlling the on and off of the switch circuit; the PCB being provided with a MOSFET circuit, the MOSFET circuit being serially connected to a negative electrode output line of a main battery of the starting power supply, the drive control module driving and controlling the on and off of the MOSFET circuit; the detection and control system comprising a main processing controller and an independent low-voltage circuit, the independent low-voltage circuit being electrically connected to the starting module, the starting module transmitting a starting signal to the main processing controller.

[0007] The main processing controller obtains the output voltage and current information of the starting power supply, compares the output voltage and current information of the starting power supply with the reference value, and sends a corresponding drive control signal to the PCB inside the starting power supply based on the comparison information of the voltage and current.

[0008] When the starting current and voltage of the starting power supply are abnormal, the main processing controller sends a starting power supply startup abnormality signal to the power management unit, and the power management unit controls the switch circuit and the Mosfet circuit to be disconnected through the drive control module, and starts the built-in independent battery to power the PCB; when the starting power supply needs to be started again, the main processing controller sends a starting test signal to the power management unit, and the power management unit controls the Mosfet circuit to be turned on through the drive control module. The main processing controller obtains the current and voltage information of the starting power supply in real time. If the starting current and voltage values ​​are normal, the main processing controller sends a normal starting signal to the power management unit, and the power management unit controls the switch circuit to be turned on through the drive control module, and the main battery inside the starting power supply powers the PCB inside the starting power supply.

[0009] As a preferred technical solution for the abnormal detection and control system in the present invention: the starting power supply is internally configured with a built-in independent battery independently connected to the power management unit of the PCB, and the PCB is configured with a charging module electrically connected to the built-in independent battery; the starting power supply housing is configured with an external interface electrically connected to the PCB, the charging module is independently connected to the switching circuit and the external interface, and the external interface is configured with a charging interface that cooperates with an independent low-voltage circuit of the detection and control system.

[0010] As a preferred technical solution for the abnormal detection control system in the present invention: the detection control system includes a startup parameter acquisition module, which acquires the startup power circuit information detected by the voltage detection module and the current detection module, and the startup parameter acquisition module transmits the acquired startup power circuit information to the main processing controller.

[0011] As a preferred technical solution for the abnormal detection control system in the present invention: the main processing controller of the detection control system includes a status information monitoring module, which detects the power driving state of the PCB inside the starting power supply, and determines whether the PCB is directly powered by the main battery of the starting power supply, or is auxiliary powered by a built-in independent battery, or is powered by an independent low-voltage circuit of the detection control system.

[0012] As a preferred technical solution for the abnormal detection control system in the present invention: a time module, a current analysis module and a voltage drop analysis module are configured in the main processing controller, the current analysis module obtains the current information detected by the current detection module in real time, and the voltage drop analysis module obtains the voltage value of the starting power supply just before the starting moment and the lowest voltage value during the starting process; the main processing controller analyzes the change information occurring in the current analysis module and the voltage drop analysis module in the same time domain, and judges the corresponding faults of the internal components of the starting power supply through the linearization output degree of the starting power supply.

[0013] As a preferred technical solution of the abnormal detection and control system in the present invention: the detection and control system includes a wireless module, and the main processing controller transmits the acquired voltage, current information, abnormal judgment information and status information of the PCB in the startup power supply to the remote system or cloud server through the wireless module.

[0014] As a preferred technical solution for the abnormality detection control system in the present invention: the drive control module of the PCB includes multiple independent control circuits, one of which is connected to the switch circuit drive, and another is connected to the Mosfet circuit drive; multiple independent signal circuits are configured between the drive control module and the power management unit.

[0015] As a preferred technical solution for the abnormality detection control system in the present invention: a low-voltage power supply line is configured between the power management unit and the drive control module and between the power management unit and the switching circuit; the power management unit is configured with a priority module, and when the main battery of the starting power supply is turned on through the switching circuit, the main battery of the starting power supply is connected, and the power management unit switches the power supply source to the main battery of the starting power supply through the priority module.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention connects the automobile starting power supply to the automobile starting simulation circuit with adjustable parameters, detects the output current and voltage information of the starting power supply when the automobile starting simulation circuit is started through the detection control system, promptly cuts off the connection between the starting power supply and the outside world and the internal PCB when abnormal starting occurs, and can re-start the starting power supply after troubleshooting under the intervention of the detection control system, and can automatically conduct the PCB connection state inside the starting power supply that can start normally, thereby reducing the degree of damage to the PCB caused by abnormal starting during the quality inspection of the starting power supply;

[0018] The present invention realizes the starting drive of the automobile starting simulation circuit through the independent low-voltage circuit of the detection system, and can also power the PCB that has been disconnected from the starting power main battery, thereby reducing the design of additional power supply and simplifying the complexity of the power supply circuit under certain conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a system logic diagram of the detection control system, the starting power supply, and the automobile starting simulation circuit in the present invention;

[0020] Figure 2 It is a system logic diagram of the main processing controller, the starting power supply and its internal PCB in the present invention;

[0021] Figure 3 This is a schematic diagram of the analysis and processing logic of the starting current and voltage information in the main processing controller of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Embodiment 1

[0024] See also Figure 1 The starting power supply is connected to the car starting simulation circuit, the car simulation circuit includes a starting module, and the independent low-voltage circuit of the detection and control system supplies power to the starting module. When the starting module starts, it sends a starting signal to the main processing controller of the detection and control system. The main processing controller obtains the starting current and voltage information of the car starting simulation circuit during the starting process through the starting parameter acquisition module.

[0025] exist Figure 1 In the figure, the detection and control system mainly includes the components in the dotted box, which basically concentrate the power supply, signal acquisition, starting current and voltage parameters in the same detection and control system, and then concentrate them in a detection and control device to complete the integrated design.

[0026] Embodiment 2

[0027] See also Figure 2In the present invention, the main processing controller obtains the current and voltage information of the starting power supply, and the main processing controller sends a drive control signal to the power management unit. The power management unit controls the on and off of the switch circuit through the drive control module. The power management unit controls the on and off of the Mosfet circuit through the drive control module. In this way, when an abnormality occurs in the starting power supply, the connection between the main battery inside the starting power supply and the PCB can be cut off in time, and the external output negative line of the main battery inside the starting power supply is also cut off. The PCB is switched to a built-in independent battery or an external power supply for power supply. Before it is determined that the starting power supply needs to be restarted, the PCB and the main battery of the starting power supply are both in a disconnected state. When the fault is eliminated and the starting power supply needs to be restarted, the main processing controller sends a start signal to the power management unit, and the power management unit controls the Mosfet circuit to be turned on through the drive control module. The main processing controller obtains the starting current and voltage information again. If the starting current and voltage are normal, the main processing controller sends a start normal signal to the power management unit, and the power management unit controls the switch circuit to be turned on through the drive control module, and the power management unit switches back to the main battery power supply state of the starting power supply.

[0028] Embodiment 3

[0029] See also Figure 3 In the present invention, a time module, a current analysis module and a voltage drop analysis module are configured in the main processing controller. The current analysis module obtains the current information detected by the current detection module in real time, and the voltage drop analysis module obtains the voltage value of the starting power supply just before the start-up moment and the lowest voltage value during the start-up process. The main processing controller monitors and analyzes the current and voltage in the time domain, which can make a reference judgment on the inside of the starting power supply to a certain extent. For example, for a starting power supply containing a supercapacitor, during the start-up process, the voltage drop is low and the current changes greatly, so that it can be judged that during the start-up process, the performance of the supercapacitor in the starting power supply is in a normal state. If the voltage drop is large, the supercapacitor in the starting power supply may be abnormal.

[0030] Embodiment 4

[0031] The external interface is equipped with multiple interfaces, one of which is a charging interface for charging the built-in independent battery, two positive and negative output ports, and a data line interface for connecting the detection and control system. The detection and control system is equipped with a power supply, which can power the starter module of the car start simulation circuit through an independent low-voltage circuit, and can also independently power the PCB when the PCB is disconnected from the main battery inside the starter power supply.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection and control system for abnormal large current during normal startup of an automobile power supply, comprising an automobile startup simulation circuit connected to a startup power supply, the startup power supply including an internal PCB, the automobile startup simulation circuit including a startup module, and the detection and control system including a voltage detection module and a current detection module connected to the startup power supply, characterized in that: The PCB is configured with a power management unit and a switch circuit, and the power management unit is electrically connected to a main battery of a starting power source through the switch circuit; The PCB is provided with a drive control module, the power management module sends a control signal to the drive control module, and the drive control module drives the on and off of the switch circuit; The PCB is provided with a Mosfet circuit, the Mosfet circuit is connected in series to the negative output line of the main battery of the starting power supply, and the drive control module drives and controls the on and off of the Mosfet circuit; The detection control system includes a main processing controller and an independent low-voltage circuit, wherein the independent low-voltage circuit is electrically connected to a start-up module, and the start-up module transmits a start-up signal to the main processing controller; The startup power supply is internally configured with a built-in independent battery independently connected to the power management unit of the PCB, and the PCB is configured with a charging module electrically connected to the built-in independent battery; The starting power supply housing is provided with an external interface electrically connected to the PCB, the charging module is independently connected to the switch circuit and the external interface respectively, and the external interface is provided with a charging interface matched with an independent low-voltage circuit of the detection control system; The main processing controller obtains the output voltage and current information of the starting power supply, compares the output voltage and current information of the starting power supply with the reference value, and sends a corresponding drive control signal to the PCB inside the starting power supply according to the comparison information of the voltage and current; When the starting current and voltage of the starting power supply are abnormal, the main processing controller sends a starting power supply abnormality signal to the power management unit, and the power management unit controls the switch circuit and the Mosfet circuit to be disconnected through the drive control module, and starts the built-in independent battery to power the PCB; When the starting power supply needs to be started again, the main processing controller sends a starting test signal to the power management unit, and the power management unit controls the Mosfet circuit to be turned on through the drive control module. The main processing controller obtains the current and voltage information of the starting power supply in real time. If the starting current and voltage values ​​are normal, the main processing controller sends a normal starting signal to the power management unit, and the power management unit controls the switch circuit to be turned on through the drive control module. The main battery inside the starting power supply supplies power to the PCB inside the starting power supply.

2. The automobile power supply normal start large current abnormality detection and control system according to claim 1 is characterized in that: The detection and control system includes a startup parameter acquisition module, which acquires startup power circuit information detected by the voltage detection module and the current detection module, and transmits the acquired startup power circuit information to the main processing controller.

3. The automobile power supply normal start-up large current abnormality detection and control system according to claim 1 is characterized in that: The main processing controller of the detection and control system includes a status information monitoring module, which detects the power driving state of the PCB inside the starting power supply, and determines whether the PCB is directly powered by the main battery of the starting power supply, or is auxiliary powered by a built-in independent battery, or is powered by an independent low-voltage circuit of the detection and control system.

4. The automobile power supply normal start-up large current abnormality detection and control system according to claim 1 is characterized in that: The main processing controller is configured with a time module, a current analysis module and a voltage drop analysis module. The current analysis module obtains the current information detected by the current detection module in real time, and the voltage drop analysis module obtains the voltage value of the startup power supply just before the startup moment and the lowest voltage value during the startup process; The main processing controller determines the corresponding faults of the internal components of the starting power supply by analyzing the change information of the current analysis module and the voltage drop analysis module in the same time domain and the linear output degree of the starting power supply.

5. The automobile power supply normal start-up large current abnormality detection and control system according to claim 1 is characterized in that: The detection and control system includes a wireless module, and the main processing controller transmits the acquired voltage, current information, abnormal judgment information and status information of the PCB in the startup power supply to a remote system or a cloud server through the wireless module.

6. The automobile power supply normal startup large current abnormality detection and control system according to claim 1, characterized in that: The drive control module of the PCB includes multiple independent control circuits, one of which is connected to the switch circuit drive, and another is connected to the Mosfet circuit drive; A plurality of independent signal lines are arranged between the drive control module and the power management unit.

7. The automobile power supply normal start-up large current abnormality detection and control system according to claim 1 is characterized in that: A low-voltage power supply line is configured between the power management unit and the drive control module and between the power management unit and the switch circuit; The power management unit is configured with a priority module. When the main battery of the starting power supply is turned on through the switch circuit, the main battery of the starting power supply is connected, and the power management unit switches the power supply source to the main battery of the starting power supply through the priority module.

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