Backup power control system and control method for automotive lithium iron phosphate batteries

Abstract

A backup power control system and method for automotive lithium iron phosphate batteries are disclosed. When the lithium iron phosphate battery of a vehicle is unable to reach the operating voltage of the vehicle's electronic control devices (such as electric doors or computers) due to insufficient voltage, a backup power control system is activated through a power rescue application on a smart mobile device. The system automatically executes a boost procedure, allowing the lithium iron phosphate battery to be boosted by a boost module and then transmitted to a supercapacitor module. The supercapacitor module, having reached its operating voltage, then powers the vehicle's electronic control devices to start them, enabling subsequent power rescue measures to be taken.

Description

Technical Field

[0001] This invention relates to power recovery for vehicle electronic control devices. Background Technology

[0002] If the vehicle's main secondary battery has insufficient voltage, the starter motor and other electronic control devices (such as power doors and computer) that rely on it for power will not function. In particular, if the doors cannot be opened remotely or electronically, the owner will be unable to enter the vehicle to perform any necessary emergency power assistance measures. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a backup power control system and control method for automotive lithium iron phosphate batteries.

[0004] Technical features of this invention:

[0005] A backup power control system for automotive lithium iron phosphate batteries, comprising:

[0006] A lithium iron phosphate battery module, a boost module, and a supercapacitor module are connected in parallel; the lithium iron phosphate battery module, the boost module, and the supercapacitor module are connected in parallel with a vehicle electronic control device.

[0007] A first switch, a second switch, and a third switch; wherein the first switch is electrically connected to the negative terminal of the vehicle's electronic control device and the negative terminal of the supercapacitor module; the second switch is electrically connected to the input negative terminal and the output negative terminal of the boost module; and the third switch is electrically connected to the positive terminal of the lithium iron phosphate battery module and the input positive terminal of the boost module.

[0008] A backup control module includes a detection unit, a control unit, and a Bluetooth module, which are commanded, controlled, ordered, and managed by a microprocessor. The detection unit detects the voltage of the lithium iron phosphate battery module and the supercapacitor module. The control unit controls the first switch, the second switch, and the third switch. The microprocessor communicates with a power rescue application built into a smart mobile device via the Bluetooth module.

[0009] A control method for a backup power control system for a vehicle lithium iron phosphate battery involves activating the backup power control system using a power rescue application in a smart mobile device. The lithium iron phosphate battery module stores and boosts the voltage of a supercapacitor module through a boost module. When the supercapacitor module boosts the voltage to a preset value (e.g., 15V), it provides voltage and current solely to the vehicle's electronic control devices (e.g., electric doors, computer), and the lithium iron phosphate battery module does not supply power to the vehicle's electronic control devices.

[0010] When the lithium iron phosphate battery fails to start the vehicle's electronic control system due to low voltage, the backup power control system can be activated through this power rescue application. This system uses a supercapacitor to boost the voltage and start the vehicle's electronic control system, especially the power doors and computer, allowing the owner to enter the vehicle and perform subsequent rescue measures.

[0011] Providing sufficient voltage and current to the vehicle's electronic control system solely through the supercapacitor module has the advantage of protecting the lithium iron phosphate battery module from over-discharge and damage.

[0012] This invention uses a supercapacitor module to power the vehicle's electronic control device, rather than the vehicle's starter motor, thereby reducing the discharge burden on the lithium iron phosphate battery module when it is under low voltage and protecting the lithium iron phosphate battery module.

[0013] The backup power control system and method of the present invention provide the dual purpose of low voltage rescue and protecting the battery from damage due to over-discharge.

[0014] For users, when faced with a vehicle's electronic control system failing to start, they can simply use the power rescue application on their smart mobile device to activate the vehicle's electronic control system, achieving one-click rescue. Attached Figure Description

[0015] [ Figure 1 [This is a block diagram of the system of the present invention.]

[0016] [ Figure 2 This is one of the schematic diagrams of the supercapacitor voltage boosting system of the present invention.

[0017] [ Figure 3 This is the second schematic diagram of the supercapacitor boosting system of the present invention.

[0018] [ Figure 4 This is a schematic diagram of the electronic control device of the vehicle powered by a supercapacitor in the system of the present invention.

[0019] List of reference numerals in the attached diagram: 1: Backup power control system; 2: Backup control module; 10: Vehicle electronic control device; 11: Supercapacitor module; 12: Boost module; 13: Lithium iron phosphate battery module; 14: First switch; 15: Second switch; 16: Third switch; 21: Microprocessor; 22: Detection unit; 23: Control unit; 24: Bluetooth module; 30: Power rescue application. Detailed Implementation

[0020] like Figure 1 The present invention provides a backup power control system 1 for automotive lithium iron phosphate batteries, comprising:

[0021] A lithium iron phosphate battery module 13, a boost module 12, and a supercapacitor module 11 are connected in parallel. These modules are connected in parallel with a vehicle electronic control unit 10. A first switch 14 is electrically connected to the negative terminal of the vehicle electronic control unit 10 and the negative terminal of the supercapacitor module 11; a second switch 15 is electrically connected to the input negative terminal and the output negative terminal of the boost module 12; and a third switch 16 is electrically connected to the positive terminal of the lithium iron phosphate battery module 13 and the input positive terminal of the boost module 12. The first switch 14, second switch 15, and third switch 16 include, but are not limited to, metal-oxide-semiconductor field-effect transistors (MOSFETs) and relays.

[0022] The backup power control system of the present invention further includes a backup control module 2, which comprises: a detection unit 22, a control unit 23, and a Bluetooth module 24, all commanded, controlled, ordered, and managed by a microprocessor 21. The detection unit 22 detects the voltage of the lithium iron phosphate battery module 13 and the supercapacitor module 11. The control unit 23 controls the first switch 14, the second switch 15, and the third switch 16. The microprocessor 21 communicates with a power rescue application 30 via the Bluetooth module 24. The power rescue application 30 is built into a smart mobile device (not shown).

[0023] The aforementioned control system 1 executes a control method to address the problem that the vehicle's electronic control device 10 cannot start due to excessively low lithium iron phosphate battery voltage. The vehicle's electronic control device 10 includes, but is not limited to, electronically controlled doors or a computer.

[0024] like Figures 1 to 4 The control method includes:

[0025] Step 1, the microprocessor 21 receives a control command issued from the power rescue application 30; the control command is issued by the user of the smart mobile device through the power rescue application 30 when the vehicle's electronic control device 10 fails to start.

[0026] Step 2: The control unit 23 turns off the first switch 14 and the second switch 15, and turns on the third switch 16. The lithium iron phosphate battery module 13 stores and boosts the voltage of the supercapacitor module 11 through the boost module 12. At the same time, the detection unit 22 detects the voltage of the supercapacitor module 11.

[0027] Step 3: When the voltage of the supercapacitor module 11 reaches a preset value (e.g., 15V), the control unit 23 turns off the third switch 16 and stops charging the supercapacitor module 11.

[0028] Step 4: The control unit 23 turns on the first switch 14, while the second switch 15 and the third switch 16 remain closed. The supercapacitor module 11 supplies power to the vehicle's electronic control device 10, enabling the vehicle's electronic control device 10 to start.

[0029] In this invention, the supercapacitor module 11 normally assists in the instantaneous starting of the vehicle and in stabilizing voltage and rapid charging and discharging during vehicle operation. This is known technology and will not be elaborated upon here. However, when the lithium iron phosphate battery module 13 is at a low voltage (e.g., below 10V), not only can the vehicle not be started, but the vehicle's electronic control device 10 also cannot operate. For example, the electric doors cannot be opened, the computer cannot be started, and the owner cannot take subsequent power rescue measures. When a car owner faces this problem, they can use the power rescue application 30 in the smart mobile device to activate the backup power control system 1. The backup power control system 1 will turn off the first switch 14 and the second switch 15, and turn on the third switch 16. The supercapacitor module 11 will be charged and boosted (e.g., to 15V) directly from the lithium iron phosphate battery module 13 through the boost module 12. When the supercapacitor module 11 reaches a preset voltage, the backup power control system 1 will turn off the second switch 15 and the third switch 16, and turn on the first switch 14 alone. This allows the supercapacitor module 11 to provide sufficient voltage and current to the vehicle's electronic control device 10, enabling the electric doors and computer to open. At this time, the lithium iron phosphate battery module 13 will not supply power to the vehicle's electronic control device 10, protecting the lithium iron phosphate battery module 13 from over-discharge and damage.

Claims

1. A backup power control system for automotive lithium iron phosphate batteries, characterized in that, include: A lithium iron phosphate battery module, a boost module, and a supercapacitor module are connected in parallel; the lithium iron phosphate battery module, the boost module, and the supercapacitor module are connected in parallel with a vehicle's electronic control device; A first switch, a second switch, and a third switch; wherein the first switch is electrically connected to the negative terminal of the vehicle's electronic control device and the negative terminal of the supercapacitor module, the second switch is electrically connected to the input negative terminal and the output negative terminal of the boost module, and the third switch is electrically connected to the positive terminal of the lithium iron phosphate battery module and the input positive terminal of the boost module. A backup control module includes a detection unit, a control unit, and a Bluetooth module, which are commanded, controlled, ordered, and managed by a microprocessor. The detection unit detects the voltage of the lithium iron phosphate battery module and the supercapacitor module. The control unit controls the first switch, the second switch, and the third switch. The microprocessor communicates with a power rescue application built into a smart mobile device via the Bluetooth module.

2. A control method for a backup power control system for a vehicle-mounted lithium iron phosphate battery according to claim 1, characterized in that, Includes the following steps: The first step is for the microprocessor to receive a control command issued from the power rescue application; In the second step, the control unit turns off the first switch and the second switch, turns on the third switch, and the lithium iron phosphate battery module boosts the voltage of the supercapacitor module through the boost module; at the same time, the detection unit detects the voltage of the supercapacitor module. In the third step, when the supercapacitor module reaches a preset voltage, the control unit turns off the third switch to stop charging the supercapacitor module. In the fourth step, the control unit turns on the first switch while keeping the second and third switches closed, and supplies power to the vehicle's electronic control unit solely through the supercapacitor module, enabling the vehicle's electronic control unit to start.

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