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US-12623564-B2 - Vehicle starting method, power supply, and vehicle

US12623564B2US 12623564 B2US12623564 B2US 12623564B2US-12623564-B2

Abstract

Examples of vehicle starting methods, power supplies, and vehicles are described. One example method includes obtaining a voltage of a first battery of a vehicle by an external power supply. When the voltage of the first battery is lower than a first voltage threshold, a second battery of the external power supply is controlled to supply power to the vehicle, to start the vehicle. In this way, whether the first battery has an insufficient voltage may be determined by obtaining the voltage of the first battery of the vehicle, and after it is determined that the first battery has the insufficient voltage, electrical energy for starting the vehicle is provided by the second battery of the external power supply, to start the vehicle.

Inventors

  • Jian Sun
  • Hui Wang
  • Lulu Yang
  • Tianzhu SONG

Assignees

  • Shenzhen Yinwang Intelligent Technologies Co., Ltd.

Dates

Publication Date
20260512
Application Date
20240315

Claims (6)

  1. 1 . A vehicle, comprising: a first battery, wherein the first battery is connected to at least one controller of the vehicle; a connection portion, wherein the connection portion is a cigarette lighter interface of the vehicle connected to the first battery and the at least one controller, and the connection portion is further configured to be connected to an external power supply; and a switching circuit, wherein: the switching circuit is configured to switch to a first mode under a first condition, and wherein: in the first mode, the switching circuit is configured to connect the connection portion to the at least one controller through a first circuit; and the first condition comprises: a voltage of the first battery is lower than a first voltage threshold, or the switching circuit receives a first signal, and the first signal is used to control the switching circuit to work in the first mode; and the switching circuit is configured to switch to a third mode under a third condition, and wherein: in the third mode, the switching circuit is configured to enable the vehicle to supply power to the connection portion through a first circuit; and the third condition comprises: the switching circuit receives a third signal, and the third signal is used to control the switching circuit to work in the third mode.
  2. 2 . The vehicle according to claim 1 , wherein the switching circuit is configured to switch to a second mode under a second condition, and wherein: in the second mode, the switching circuit is configured to connect the connection portion to the first battery through a second circuit; and the second condition comprises: a voltage of the first battery is higher than a second voltage threshold, or the switching circuit receives a second signal, and the second signal is used to control the switching circuit to work in the second mode.
  3. 3 . A method for controlling a vehicle power system of a vehicle, wherein the vehicle comprises a first battery, at least one controller, a switching circuit, and a connection portion, wherein the connection portion is a cigarette lighter interface of the vehicle connected to the first battery and the at least one controller, and the connection portion is further configured to be connected to an external power supply, the method comprising: controlling the switching circuit to switch to a first mode under a first condition or switch to a third mode under a third condition, wherein controlling the switching circuit to switch to the first mode under the first condition comprises: in the first mode, connecting the connection portion to the at least one controller through a first circuit of the switching circuit; and the first condition comprises: a voltage of the first battery is lower than a first voltage threshold, or the switching circuit receives a first signal, and the first signal is used to control the switching circuit to work in the first mode; and wherein controlling the switching circuit to switch to the third mode under a third condition comprises: in the third mode, enabling the vehicle to supply power to the connection portion through the first circuit; and the third condition comprises: the switching circuit receives a third signal, and the third signal is used to control the switching circuit to work in the third mode.
  4. 4 . The method according to claim 3 , further comprising: controlling the switching circuit to switch to a second mode under a second condition, wherein controlling the switching circuit to switch to the second mode under the second condition comprises: in the second mode, connecting the connection portion to the first battery through a second circuit; and the second condition comprises: a voltage of the first battery is higher than a second voltage threshold, or the switching circuit receives a second signal, and the second signal is used to control the switching circuit to work in the second mode.
  5. 5 . A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores program instructions, and when the program instructions are executed by a computer of a vehicle, cause the computer to perform operations for controlling a power system of the vehicle, wherein the vehicle comprises a first battery, at least one controller, a switching circuit, and a connection portion, wherein the connection portion is a cigarette lighter interface of the vehicle connected to the first battery and the at least one controller, and the connection portion is further configured to be connected to an external power supply; the operations comprising: controlling the switching circuit to switch to a first mode under a first condition or switch to a third mode under a third condition, wherein controlling the switching circuit to switch to the first mode under the first condition comprises: in the first mode, connecting the connection portion to the at least one controller through a first circuit of the switching circuit; and the first condition comprises: a voltage of the first battery is lower than a first voltage threshold, or the switching circuit receives a first signal, and the first signal is used to control the switching circuit to work in the first mode; and wherein controlling the switching circuit to switch to the third mode under a third condition comprises: in the third mode, enabling the vehicle to supply power to the connection portion through the first circuit; and the third condition comprises: the switching circuit receives a third signal, and the third signal is used to control the switching circuit to work in the third mode.
  6. 6 . The non-transitory computer-readable storage medium according to claim 5 , the operations further comprising: controlling the switching circuit to switch to a second mode under a second condition, wherein controlling the switching circuit to switch to the second mode under the second condition comprises: in the second mode, connecting the connection portion to the first battery through a second circuit; and the second condition comprises: a voltage of the first battery is higher than a second voltage threshold, or the switching circuit receives a second signal, and the second signal is used to control the switching circuit to work in the second mode.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2021/119109, filed on Sep. 17, 2021, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD This application relates to the technical field of electric vehicles, and in particular, to a vehicle starting method, a power supply, and a vehicle. BACKGROUND With continuous development and evolution of intelligentization and electrification of a vehicle, more functions are developed and applied to the vehicle, so that functions of the vehicle are increasingly rich and powerful, and a quantity and performance of controllers are gradually increased. To enable various functions of the vehicle to function normally, no matter whether the vehicle is running or stalls, a vehicle-mounted low voltage storage battery (also referred to as an auxiliary battery) is required to continuously supply low voltage electrical energy. Therefore, if the vehicle is parked for a long time, power of the vehicle-mounted low voltage storage battery in the vehicle may be gradually consumed, and finally the vehicle-mounted low voltage storage battery is in an insufficient voltage (that is, the power of the battery is lower than a preset value) state. When the vehicle-mounted low voltage storage battery is in the insufficient voltage state, because a controller cannot obtain sufficient low voltage electrical energy, the controller cannot work. In this case, a part using an electronic lock, for example, a vehicle door, a front cover plate, or a rear cover plate of the vehicle, cannot be opened by using an electronic key. If the vehicle is equipped with a mechanical key, the vehicle door, the front cover plate, and the rear cover plate of the vehicle can be opened by using the mechanical key, and then a plurality of components for protecting and hiding the vehicle-mounted low voltage storage battery may be removed by using a special-purpose tool, to enable a positive electrode and a negative electrode of the vehicle-mounted low voltage storage battery to be exposed. If the vehicle is not equipped with a mechanical key, the plurality of components for protecting and hiding the vehicle-mounted low voltage storage battery may be removed after the vehicle door, the front cover plate, and the rear cover plate of the vehicle are opened by using the special-purpose tool, to enable the positive electrode and the negative electrode of the vehicle-mounted low voltage storage battery to be exposed. Finally, a positive electrode and a negative electrode of an emergency power supply are connected to the positive electrode and the negative electrode of the vehicle-mounted low voltage storage battery, to provide low voltage electricity to the vehicle by using the emergency power supply and start the vehicle. SUMMARY This application provides a vehicle starting method, a power supply, and a vehicle, so that when a first battery of the vehicle has an insufficient voltage and fails to start the vehicle, electrical energy for starting the vehicle may be provided, to start the vehicle. According to a first aspect, this application provides a vehicle starting method. The method includes: obtaining a voltage of a first battery of a vehicle; and when the voltage of the first battery is lower than a first voltage threshold, controlling a second battery of an external power supply to supply power to the vehicle. In this way, whether the first battery has an insufficient voltage may be determined by obtaining the voltage of the first battery of the vehicle, and after it is determined that the first battery has the insufficient voltage, electrical energy for starting the vehicle is provided by the second battery of the external power supply, to start the vehicle. As a possible implementation in the first aspect, the controlling a second battery of an external power supply to supply power to the vehicle includes: controlling the second battery to supply power to the vehicle through a first circuit. A maximum operating current allowed by the first circuit is a first current threshold. In this way, overload protection may be provided through the first circuit, to avoid damage to an electronic component like a controller in the vehicle due to an excessively large current. As a possible implementation in the first aspect, the method further includes: when the voltage of the first battery is higher than a second voltage threshold, controlling the second battery to stop supplying power to the vehicle. After the vehicle is started, the controller in the vehicle controls a high voltage battery in the vehicle to charge the first battery. Therefore, when it is detected that the voltage of the first battery is higher than the second voltage threshold, it may be determined that the high voltage battery starts to charge the first battery, and the vehicle has been started. Therefore, the second battery may be controlled to stop supplyin