Battery charging method and device applied to vehicle, electronic equipment, storage medium and program product

Abstract

Embodiments of the present application provide a battery charging method and device applied to a vehicle, electronic equipment, storage medium and program product. The method comprises: detecting a voltage state of a storage battery in the vehicle during control of a photovoltaic assembly in the vehicle to charge a power battery in the vehicle; and when it is determined that the voltage state of the storage battery represents that the voltage of the storage battery is less than a first preset threshold, controlling a vehicle step-down DC / DC to be turned on, so that voltage lines of the power battery, the vehicle step-down DC / DC and the storage battery are connected, and the power battery charges the storage battery through the vehicle step-down DC / DC. The method is used to improve the utilization rate of photovoltaic power generation, avoid the occurrence of the situation that the vehicle cannot be normally started due to the continuous discharge of the storage battery and the resulting power loss.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a battery charging method, device, electronic device, storage medium, and program product applied to a vehicle. Background Art

[0002] With the rapid development of new energy technologies in the vehicle field, electric vehicles are being chosen by more and more users as a means of transportation. Faced with the charging needs of electric vehicles, many electric vehicles choose to charge their vehicle batteries through photovoltaic modules.

[0003] In the existing technology, the vehicle power battery can be charged through photovoltaic modules, and since the vehicle power battery requires a large amount of power, the utilization rate of photovoltaic power generation is higher.

[0004] However, existing photovoltaic charging technology is not yet mature in high-voltage charging of vehicle power batteries, and cannot take into account the status of all batteries in the vehicle. It is easy to cause the battery to run low when charging the power battery, which will damage the battery life and cause the vehicle to fail to start normally. Summary of the Invention

[0005] The embodiments of the present application provide a battery charging method, device, electronic device, storage medium and program product for use in a vehicle, which are used to solve the problem of insufficient battery power when a photovoltaic module charges a power battery.

[0006] In a first aspect, an embodiment of the present application provides a battery charging method for a vehicle. The method is applied to a photovoltaic controller in the vehicle. The photovoltaic controller is respectively connected to a photovoltaic module, a power battery, a storage battery, and a vehicle step-down DC / DC in the vehicle. The power battery is connected to the storage battery via the vehicle step-down DC / DC. The method includes:

[0007] In the process of controlling the photovoltaic components in the vehicle to charge the power battery in the vehicle, detecting the voltage state of the battery in the vehicle;

[0008] When it is determined that the voltage state of the battery indicates that the battery voltage is less than a first preset threshold, the vehicle step-down DC / DC is controlled to be turned on, so that the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery are conductive, so that the power battery charges the battery through the vehicle step-down DC / DC.

[0009] In a second aspect, an embodiment of the present application provides a battery charging device for a vehicle, the device being applied to a photovoltaic controller in the vehicle, the photovoltaic controller being connected to a photovoltaic module, a power battery, a storage battery, and a vehicle step-down DC / DC in the vehicle, respectively, the power battery being connected to the storage battery via the vehicle step-down DC / DC; the device comprising:

[0010] a detection unit configured to detect a voltage state of the battery in the vehicle during control of the photovoltaic module in the vehicle to charge the power battery in the vehicle;

[0011] a control unit configured to control the vehicle DC / DC to be turned on to make a voltage path of the power battery, the vehicle DC / DC and the battery be connected, so that the power battery charges the battery through the vehicle DC / DC when it is determined that the voltage state of the battery represents that the battery voltage is less than a first preset threshold.

[0012] In a third aspect, an embodiment of the present application provides a photovoltaic controller, comprising: a memory, a processor;

[0013] The memory stores computer execution instructions.

[0014] The processor executes the computer execution instructions stored in the memory, so that the processor executes the first aspect and / or various possible implementation manners of the first aspect.

[0015] In a fourth aspect, an embodiment of the present application provides a battery charging system applied to a vehicle, comprising: the photovoltaic controller, the photovoltaic module, the power battery, the battery and the vehicle DC / DC as described in the third aspect.

[0016] The photovoltaic controller is connected with the photovoltaic module, the power battery, the battery and the vehicle DC / DC in the vehicle respectively, and the power battery is connected with the battery through the vehicle DC / DC.

[0017] In a fifth aspect, an embodiment of the present application provides a vehicle, wherein the vehicle is provided with the battery charging system applied to the vehicle as described in the fourth aspect.

[0018] In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, wherein the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0019] In a seventh aspect, an embodiment of the present application provides a computer program product, comprising a computer program, and the computer program is executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0020] The battery charging method applied to the vehicle provided by the embodiment of the application, through the process that the photovoltaic assembly charges the vehicle power battery, the photovoltaic controller detects the voltage state of the storage battery in real time, when the voltage of the storage battery reaches the first preset threshold, the photovoltaic controller controls the whole vehicle voltage reduction DC / DC to start, so that the vehicle power battery charges the storage battery, the photovoltaic assembly charging the vehicle power battery improves the utilization rate of photovoltaic power generation, when the voltage or the electric quantity of the storage battery is insufficient, the photovoltaic controller controls the whole vehicle voltage reduction DC / DC to start in time, charges the storage battery through the power battery, and the power loss of the storage battery is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated by reference in the specification and forming part of the specification, show embodiments consistent with the application, and together with the specification, serve to explain the principles of the application.

[0022] Figure 1 The flowchart of the battery charging method applied to the vehicle provided by the embodiment of the application Figure 1 ;

[0023] Figure 2 The flowchart of the battery charging method applied to the vehicle provided by the embodiment of the application Figure 2 ;

[0024] Figure 3 The flowchart of the battery charging method applied to the vehicle provided by the embodiment of the application Figure 3 ;

[0025] Figure 4 The structural diagram of the battery charging device applied to the vehicle provided by the embodiment of the application

[0026] Figure 5 The structural diagram of the photovoltaic controller provided by the embodiment of the application

[0027] Figure 6 The structural diagram of the battery charging system applied to the vehicle provided by the embodiment of the application Figure 1 ;

[0028] Figure 7 The structural diagram of the battery charging system applied to the vehicle provided by the embodiment of the application Figure 2 .

[0029] Through the above drawings, the specific embodiments of the application have been shown, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the application by any means, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0031] As new energy vehicles are increasingly equipped with photovoltaic modules to charge vehicle batteries, how to use photovoltaic modules to complete the charging process of vehicle batteries has become a new technical issue.

[0032] In one example, PV panels can be used to charge vehicle batteries. However, because vehicle batteries have a small storage capacity and the vehicle's power battery can be charged via the vehicle's step-down DC / DC converter, if the PV panels also charge the battery, the battery will easily become fully charged. Once fully charged, the PV power cannot be used, resulting in low PV power generation utilization.

[0033] In another example, photovoltaic panels can be used to charge a vehicle's power battery. However, when charging the vehicle's power battery, especially after the vehicle is turned off, the battery's voltage and charge level decrease as the power supply progresses, leading to a potential battery drain. This is because the battery's charging process requires the battery to power components such as the vehicle's battery management system and vehicle control system. If the battery is not charged in a timely manner, the battery voltage and charge level decrease as the power supply progresses, causing the vehicle to run out of power.

[0034] The battery charging method, device, electronic device, storage medium and program product provided in this application for vehicle are intended to solve the above-mentioned technical problems.

[0035] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0036] Figure 1 A schematic diagram of a battery charging method for a vehicle provided in this application Figure 1 The method is applied to the photovoltaic controller in the vehicle. The photovoltaic controller is connected to the photovoltaic components, power battery, storage battery and vehicle step-down DC / DC in the vehicle respectively. The power battery is connected to the storage battery through the vehicle step-down DC / DC. Figure 1 As shown, the method includes:

[0037] S101. While controlling a photovoltaic assembly in a vehicle to charge a power battery in the vehicle, detect a voltage state of a battery in the vehicle.

[0038] For example, photovoltaic modules are solar panels installed on vehicles that convert sunlight into electricity. Power batteries are core components of new energy vehicles, providing the necessary power to drive the electric motor and propel the vehicle. A photovoltaic controller is a component of new energy vehicles that manages the process of charging the vehicle battery from the photovoltaic modules.

[0039] During the charging process, the power battery in the vehicle supplies power to the vehicle battery management system, vehicle control system and other components. If the battery cannot be charged in time, the battery voltage will drop and the power will decrease as the power supply process proceeds, and the vehicle will easily run out of power.

[0040] Therefore, when the photovoltaic controller charges the power battery, the photovoltaic controller detects the voltage status of the vehicle battery in real time by connecting to the battery.

[0041] S102. When it is determined that the voltage state of the battery indicates that the battery voltage is less than a first preset threshold, control the vehicle step-down DC / DC to turn on, so that the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery are conductive, so that the power battery charges the battery through the vehicle step-down DC / DC.

[0042] For example, a battery is a component in a vehicle that stores electrical energy. When the engine is not running (i.e., when the vehicle is powered off or turned off), it provides power to the vehicle's electrical systems, such as lighting, speakers, and navigation. While the vehicle is charging its power battery, the battery also powers other components, such as the vehicle's battery management system and vehicle control system. A step-down DC / DC converter is a power conversion device used in a vehicle's electrical system, converting the high voltage of the vehicle's power battery into the lower voltage required by the battery and various onboard electronic devices to ensure their proper function.

[0043] When the PV controller detects that the battery voltage is less than a first preset threshold, indicating that the battery voltage is too low, and if it cannot be charged in time, the battery will easily run out of power. The PV controller then controls the vehicle's step-down DC / DC converter to turn on, connecting the voltage paths between the power battery, the vehicle's step-down DC / DC converter, and the battery. The vehicle's step-down DC / DC converter then steps down the current from the vehicle's power battery to the constant voltage current required by the battery, charging the battery. Because the power battery's input power per unit time to the battery after charging the battery through the vehicle's step-down DC / DC converter is greater than the battery's output power per unit time to power other components, such as the vehicle's battery management system and vehicle control system, the likelihood of battery runout is reduced.

[0044] An embodiment of the present application provides a battery charging method for a vehicle. During the process of charging the vehicle's power battery with a photovoltaic component, a photovoltaic controller detects the voltage status of the battery in real time. When the battery voltage reaches a first preset threshold, the photovoltaic controller controls the vehicle's step-down DC / DC to turn on, so that the vehicle's power battery charges the battery. Charging the vehicle's power battery with the photovoltaic component improves the utilization rate of photovoltaic power generation. When the battery voltage or power is insufficient, the battery is charged in a timely manner through the power battery, avoiding battery depletion, which may cause the vehicle to fail to start normally.

[0045] Figure 2 A schematic diagram of a battery charging method for a vehicle provided in this application Figure 2 The method is applied to a photovoltaic controller in a vehicle. The photovoltaic controller is connected to the photovoltaic components, power battery, storage battery, and vehicle step-down DC / DC in the vehicle respectively. The power battery is connected to the storage battery through the vehicle step-down DC / DC. The photovoltaic controller is connected to the battery management system in the vehicle, and the battery management system is connected to the power battery through a first relay. The photovoltaic controller is provided with a second relay and a boost DC / DC connected to each other. The photovoltaic components are connected to the second relay, and the boost DC / DC is connected to the battery management system. Figure 2 As shown, this embodiment Figure 1 Based on the embodiment, a battery charging method applied to a vehicle is described in detail. The method includes:

[0046] S201 , in response to a trigger signal, controlling a photovoltaic controller to turn on; wherein the trigger signal indicates that a voltage value of a photovoltaic component indicating a voltage state is greater than or equal to a second preset threshold.

[0047] For example, when the external light is weak, the light energy is not enough to be converted into electrical energy by the photovoltaic module, or the electrical energy converted from the light energy cannot meet the voltage required for the photovoltaic module to power the power supply. As the light becomes stronger, the voltage of the electrical energy converted by the photovoltaic module increases.

[0048] In one example, the voltage signal generated by the photovoltaic assembly reaches the voltage required to turn on the photovoltaic controller, and the photovoltaic controller turns on in response to the voltage signal. The second preset threshold is the minimum voltage value of the electrical energy converted by the photovoltaic assembly that can turn on the photovoltaic controller.

[0049] In one example, the voltage signal generated by the photovoltaic component reaches the voltage required for the photovoltaic component to charge the vehicle power battery, and the photovoltaic controller turns on in response to the voltage signal. The second preset threshold is the minimum voltage value that the electrical energy converted by the photovoltaic component can use to power the vehicle power battery.

[0050] S202: Send a high-level signal to the battery management system to wake up the battery management system.

[0051] For example, the battery management system BMS (Battery Management System) is an electronic control unit of a vehicle used to monitor and manage the charging and discharging process of the vehicle's power battery and ensure the safe operation of the vehicle's power battery. When not charging, the vehicle's battery management system is in a dormant state.

[0052] In one example, if the second preset threshold is the minimum voltage value of the photovoltaic controller that can be activated by the electric energy converted by the photovoltaic component, after the photovoltaic controller is turned on, the photovoltaic controller detects the electric power output by the photovoltaic component. If the electric power output by the photovoltaic component is greater than the preset electric power threshold, the photovoltaic controller sends a high-level signal to the connected battery management system to wake up the battery management system and start the subsequent charging process.

[0053] In one example, if the second preset threshold is the minimum voltage value that the electric energy converted by the photovoltaic module can use to power the vehicle's power battery, after the photovoltaic controller is turned on, the photovoltaic module immediately sends a high-level signal to the connected battery management system to wake up the battery management system and start the subsequent charging process.

[0054] S203. Send a charging request instruction to the battery management system so that the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system, and the first relay; wherein the charging request instruction indicates that the power battery needs to be charged; the battery management system is used to close the first relay so that the battery management system is connected to the power battery through the first relay.

[0055] In one example, step S203 further includes:

[0056] Sending a charging request instruction to the battery management system; wherein the charging request instruction is also used by the battery management system to obtain the status of the power battery; when the status of the power battery indicates that the power battery is in a chargeable state, the battery management system is used to close the first relay;

[0057] Receiving a charging permission signal sent by a battery management system; wherein the charging permission signal indicates that the power battery can be charged;

[0058] The second relay in the photovoltaic controller is closed, and the boost DC / DC in the photovoltaic controller is awakened, so that the photovoltaic component is connected to the battery management system through the photovoltaic controller. Then, the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system and the first relay.

[0059] Exemplarily, the photovoltaic controller sends a charging request instruction to the battery management system. The charging request instruction is used to indicate that the external light intensity of the vehicle meets the vehicle charging conditions, and instructs the vehicle battery management system to detect whether the current vehicle power battery needs to be charged.

[0060] After receiving the charging request instruction from the photovoltaic controller, the vehicle battery management system detects the vehicle power battery status, which includes the power battery temperature, power battery voltage and power battery signal.

[0061] In one example, if the vehicle's power battery temperature is within a preset normal temperature range, the vehicle's power battery voltage is less than a preset charging-unnecessary voltage, and the vehicle's power battery signal is a preset normal signal, indicating that the vehicle's power battery is currently rechargeable, the battery management system closes the first relay located between the battery management system and the power battery, allowing current from the photovoltaic module to flow through the vehicle management system and supply the power battery for charging. The first relay controls the flow of current from the vehicle management system to the power battery. When the vehicle's power battery is not being charged, the first relay is disconnected.

[0062] In one example, if the vehicle power battery temperature is outside the preset normal temperature range, or the vehicle power battery voltage is greater than or equal to the preset charging-free voltage, or the vehicle power battery signal is not a preset normal signal, it indicates that the current vehicle power battery is in an unrechargeable state, the first relay continues to remain in the disconnected state, and the photovoltaic controller periodically sends a charging request instruction to the battery management system until it receives a charging permission signal from the battery management system.

[0063] When the battery management system turns off the first relay, the battery management system sends a charging permission signal to the photovoltaic controller. The charging permission signal indicates that the circuit between the battery management system and the power battery is connected and the power battery can be charged.

[0064] After receiving the charging permission signal from the battery management system, the PV management system closes the second relay inside the PV controller, which is connected to the PV module and the boost DC / DC. This allows the current from the PV module to be conducted to the vehicle battery management system. The PV controller then controls the boost DC / DC to turn on, boosting the current from the PV module to the charging voltage of the vehicle's power battery, allowing the PV module to charge the vehicle's power battery. The boost DC / DC is set in the PV controller to boost the current from the PV module so that the lower voltage generated by the PV module can meet the high-voltage charging requirements of the power battery. The second relay is set in the PV controller to control the on-off current path from the PV module to the boost DC / DC.

[0065] S204 . In the process of controlling the photovoltaic assembly in the vehicle to charge the power battery in the vehicle, detecting the voltage state of the battery in the vehicle.

[0066] Exemplarily, when the power battery in the vehicle is charging, the storage battery supplies power to components such as the vehicle battery management system and the vehicle control system, and if the storage battery cannot be charged in time, the voltage of the storage battery will decrease and the power will decrease as the power supply process proceeds, and the vehicle is prone to power loss.

[0067] Therefore, when the photovoltaic controller closes the second relay in the photovoltaic controller, the photovoltaic controller opens the real-time detection of the voltage state of the vehicle storage battery.

[0068] S205, when it is determined that the voltage state of the storage battery represents that the voltage of the storage battery is less than the first preset threshold, the vehicle step-down DC / DC is controlled to be turned on, so that the voltage lines of the power battery, the vehicle step-down DC / DC and the storage battery are conducted, so that the power battery charges the storage battery through the vehicle step-down DC / DC.

[0069] In one example, the step S205 of "controlling the vehicle step-down DC / DC to be turned on" includes:

[0070] Power is supplied to the internal chip of the vehicle step-down DC / DC to wake up the vehicle step-down DC / DC to be turned on.

[0071] Exemplarily, when the photovoltaic controller detects that the voltage of the storage battery is less than the first preset threshold, it represents that the voltage of the storage battery is too low at this moment, and if it cannot be charged in time, the storage battery is prone to power loss. The photovoltaic controller controls the vehicle step-down DC / DC to be turned on, the voltage lines of the power battery, the vehicle step-down DC / DC and the storage battery are conducted, and the vehicle step-down DC / DC reduces the current from the vehicle power battery, reduces the constant voltage current required by the storage battery, and charges the storage battery. Since the input power of the power battery to the storage battery per unit time is greater than the output power of the storage battery to other components such as the vehicle battery management system and the vehicle control system per unit time after the power battery charges the storage battery through the vehicle step-down DC / DC, the occurrence of the power loss of the storage battery is reduced.

[0072] S206, if it is determined that the voltage value represented by the voltage state of the photovoltaic module is less than the second preset threshold, a first stop charging instruction is sent to the battery management system, wherein the first stop charging instruction is used to instruct to stop charging the power battery; and the battery management system is used to control the first relay to be disconnected after receiving the first stop charging instruction.

[0073] Exemplarily, when the voltage value of the photovoltaic module obtained by the photovoltaic controller in real time is less than the second preset threshold, it represents that the external light of the vehicle is weakened and cannot reach the required light intensity for charging, and then the photovoltaic controller sends a first stop charging instruction to the battery management system, which is used to instruct to stop charging the power battery.

[0074] After receiving the first stop charging instruction from the photovoltaic controller, the battery management system disconnects the first relay and sends a feedback signal to the photovoltaic controller.

[0075] S207: Receive a feedback signal sent by the battery management system, and disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery; wherein the feedback signal indicates that charging of the power battery has stopped.

[0076] For example, the photovoltaic controller receives a feedback signal from the battery management system, indicating that the circuit between the battery management system and the power battery has been disconnected. The photovoltaic controller disconnects the circuit between the photovoltaic component and the battery management system by disconnecting the second relay. At the same time, the photovoltaic controller sends a low-level signal to the vehicle battery management system to control the battery management system to sleep.

[0077] S208. When it is determined that the voltage state of the battery indicates that the battery voltage is greater than or equal to a first preset threshold, shut down the vehicle step-down DC / DC to disconnect the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery.

[0078] For example, when the battery voltage is greater than or equal to a first preset threshold, it indicates that the battery no longer needs to be charged and there is no power shortage. The vehicle step-down DC / DC is turned off, so that the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery are disconnected, and the power battery stops charging the battery.

[0079] The embodiment of the present application provides a battery charging method for a vehicle, which controls the photovoltaic controller to turn on in response to a trigger signal; wherein the trigger signal indicates that the voltage value of the voltage state of the photovoltaic component is greater than or equal to a second preset threshold value, sends a high-level signal to the battery management system to wake up the battery management system, and sends a charging request instruction to the battery management system, so that the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system, and the first relay; wherein the charging request instruction indicates that the power battery needs to be charged; the battery management system is used to turn off the first relay so that the battery management system is connected to the power battery through the first relay, and in the process of controlling the photovoltaic component in the vehicle to charge the power battery in the vehicle, detects the voltage state of the battery in the vehicle, and when it is determined that the voltage state of the battery indicates that the battery voltage is less than the first preset threshold value, controls the vehicle step-down DC / DC to turn on, so that the voltage paths of the power battery, the vehicle step-down DC / DC, and the battery are connected, so that the power battery is connected through The vehicle's step-down DC / DC charges the battery. If it is determined that the voltage value represented by the voltage state of the photovoltaic module is less than a second preset threshold, a first stop charging instruction is sent to the battery management system, wherein the first stop charging instruction is used to instruct to stop charging the power battery; the battery management system is used to control the first relay to disconnect after receiving the first stop charging instruction, receive the feedback signal sent by the battery management system, and disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery; wherein the feedback signal indicates that charging of the power battery has stopped. When it is determined that the voltage state of the battery represents that the battery voltage is greater than or equal to the first preset threshold, the vehicle's step-down DC / DC is turned off to disconnect the voltage routes of the power battery, the vehicle's step-down DC / DC, and the battery, so that the photovoltaic module charges the vehicle's power battery, thereby improving the utilization rate of photovoltaic power generation. When the battery voltage or power is insufficient, the battery is charged in time through the power battery, thereby avoiding the battery being depleted and the vehicle being unable to start normally. Figure 3 A schematic diagram of a battery charging method for a vehicle provided in this application Figure 3 The method is applied to a photovoltaic controller in a vehicle. The photovoltaic controller is respectively connected to the photovoltaic components, power battery, storage battery, and vehicle step-down DC / DC in the vehicle. The power battery is connected to the storage battery through the vehicle step-down DC / DC. The photovoltaic controller is connected to the battery management system in the vehicle, and the battery management system is connected to the power battery through a first relay. The photovoltaic controller is provided with a second relay and a boost DC / DC connected to each other. The photovoltaic components are connected to the second relay, and the boost DC / DC is connected to the battery management system. Figure 3 As shown, this embodiment Figure 1 Based on the embodiment, a battery charging method applied to a vehicle is described in detail. The method includes:

[0080] S301, in response to a trigger signal, control the photovoltaic controller to start; wherein the trigger signal represents that the voltage value represented by the voltage state of the photovoltaic module is greater than or equal to the second preset threshold value.

[0081] Exemplarily, this step can refer to the above step S201, and will not be repeated here.

[0082] S302, send a high-level signal to the battery management system to wake up the battery management system.

[0083] Exemplarily, this step can refer to the above step S202, and will not be repeated here.

[0084] S303, send a charging request instruction to the battery management system to make the photovoltaic module charge the power battery through the photovoltaic controller, the battery management system and the first relay; wherein the charging request instruction represents that the power battery needs to be charged; the battery management system is used to close the first relay to make the battery management system conduct with the power battery through the first relay.

[0085] In one example, step S303 further comprises:

[0086] sending a charging request instruction to the battery management system; wherein the charging request instruction is also used for the battery management system to obtain the state of the power battery; when the state of the power battery represents that the power battery is in a chargeable state, the battery management system is used to close the first relay;

[0087] receive the charging permission signal sent by the battery management system; wherein the charging permission signal represents that the power battery can be charged;

[0088] close the second relay in the photovoltaic controller and wake up the boost DC / DC in the photovoltaic controller, so that after the photovoltaic module is conducted with the battery management system through the photovoltaic controller, the photovoltaic module charges the power battery through the photovoltaic controller, the battery management system and the first relay.

[0089] Exemplarily, this step can refer to the above step S203, and will not be repeated here.

[0090] S304, in the process of controlling the photovoltaic module in the vehicle to charge the power battery in the vehicle, detecting the voltage state of the storage battery in the vehicle.

[0091] Exemplarily, this step can refer to the above step S204, and will not be repeated here.

[0092] S305, when it is determined that the voltage state of the storage battery represents that the storage battery voltage is less than the first preset threshold value, control the whole vehicle to start the boost DC / DC, so that the voltage lines of the power battery, the whole vehicle boost DC / DC and the storage battery are conducted, so that the power battery charges the storage battery through the whole vehicle boost DC / DC.

[0093] In one example, in step S305, “controlling the vehicle step-down DC / DC to start” includes:

[0094] Power is supplied to the internal chip of the vehicle's step-down DC / DC to wake up the vehicle's step-down DC / DC and start it up.

[0095] For example, this step may refer to the above-mentioned step S205 and will not be described in detail.

[0096] S306. Receive a stop charging signal sent by the battery management system; wherein the stop charging signal indicates a request to stop charging the power battery, the stop charging signal is issued when determining that the power battery is in an unrechargeable state, and the stop charging signal is issued after the battery management system controls the first relay to be disconnected.

[0097] For example, when the battery management system is obtaining the status of the vehicle power battery in real time, if it is found that the vehicle power battery is in an unrechargeable state, such as the vehicle power battery temperature is outside the preset normal temperature range, or the vehicle power battery voltage is greater than or equal to the preset charging-free voltage, or the vehicle power battery signal is not a preset normal signal, the battery management system disconnects the first relay and sends a stop charging signal to the photovoltaic controller.

[0098] S307: Disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery.

[0099] For example, after receiving the stop charging signal, the photovoltaic controller disconnects the internal second relay, and at the same time sends a low-level signal to the vehicle battery management system to control the battery management system to sleep.

[0100] S308: When it is determined that the voltage state of the battery indicates that the battery voltage is greater than or equal to a first preset threshold, shut down the vehicle step-down DC / DC to disconnect the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery.

[0101] For example, this step may refer to the above-mentioned step S208 and will not be described in detail.

[0102] An embodiment of the present application provides a battery charging method for a vehicle, which controls the photovoltaic controller to turn on in response to a trigger signal; wherein the trigger signal indicates that the voltage value of the voltage state of the photovoltaic component is greater than or equal to a second preset threshold value, sends a high-level signal to the battery management system to wake up the battery management system, and sends a charging request instruction to the battery management system, so that the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system, and the first relay; wherein the charging request instruction indicates that the power battery needs to be charged; the battery management system is used to turn off the first relay so that the battery management system is connected to the power battery through the first relay, and in the process of controlling the photovoltaic component in the vehicle to charge the power battery in the vehicle, detects the voltage state of the battery in the vehicle, and when it is determined that the voltage state of the battery indicates that the battery voltage is less than the first preset threshold value, controls the vehicle step-down DC / DC to turn on, so that the power battery, the vehicle step-down DC / DC, and the battery three The voltage path of the two is turned on, so that the power battery charges the storage battery through the vehicle step-down DC / DC, and receives a stop charging signal sent by the battery management system; wherein, the stop charging signal represents a request to stop charging the power battery, and the stop charging signal is issued when it is determined that the status of the power battery represents that the power battery is in an unrechargeable state, and the stop charging signal is issued after the battery management system controls the first relay to be disconnected, disconnecting the second relay in the photovoltaic controller to stop supplying power to the power battery, and when it is determined that the voltage status of the battery represents that the battery voltage is greater than or equal to a first preset threshold, turning off the vehicle step-down DC / DC, so that the voltage paths of the power battery, the vehicle step-down DC / DC, and the battery are disconnected, so that the photovoltaic component charges the vehicle power battery, which improves the utilization rate of photovoltaic power generation. When the battery voltage or power is insufficient, the battery is charged in time through the power battery, avoiding the occurrence of battery power loss, which causes the vehicle to be unable to start normally. Figure 4 This is a schematic diagram of the structure of a battery charging device for a vehicle provided in this application, such as Figure 4 As shown, this embodiment provides a battery charging device 40 for a vehicle, comprising:

[0103] The detection unit 401 is used to detect the voltage state of the battery in the vehicle during the process of controlling the photovoltaic assembly in the vehicle to charge the power battery in the vehicle;

[0104] The control unit 402 is configured to control the vehicle step-down DC / DC to turn on when determining that the battery voltage status indicates that the battery voltage is less than a first preset threshold, so as to connect the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery, so that the power battery charges the battery through the vehicle step-down DC / DC.

[0105] In a possible implementation, the control unit 402 includes:

[0106] The wake-up module 4021 is used to supply power to the internal chip of the vehicle's buck DC / DC to wake up the vehicle's buck DC / DC and turn it on.

[0107] In one possible implementation, the photovoltaic controller is connected to a battery management system in the vehicle, and the battery management system is connected to the power battery via a first relay;

[0108] The detection unit 401 includes:

[0109] The control module 4011 is configured to control the photovoltaic controller to start in response to a trigger signal, wherein the trigger signal indicates that the voltage state of the photovoltaic module is greater than or equal to a second preset threshold value;

[0110] The charging module 4012 is used to send a charging request instruction to the battery management system so that the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system, and the first relay; wherein the charging request instruction indicates that the power battery needs to be charged; the battery management system is used to close the first relay so that the battery management system is connected to the power battery through the first relay.

[0111] In one possible implementation, the photovoltaic controller is provided with a second relay and a boost DC / DC connected to each other, the photovoltaic module is connected to the second relay, and the boost DC / DC is connected to the battery management system; the charging module 4012 includes:

[0112] Sending a charging request instruction to the battery management system; wherein the charging request instruction is also used by the battery management system to obtain the status of the power battery; when the status of the power battery indicates that the power battery is in a chargeable state, the battery management system is used to close the first relay;

[0113] Receiving a charging permission signal sent by a battery management system; wherein the charging permission signal indicates that the power battery can be charged;

[0114] The second relay in the photovoltaic controller is turned off, and the boost DC / DC in the photovoltaic controller is awakened, so that the photovoltaic component is connected to the battery management system through the photovoltaic controller. Then, the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system and the first relay.

[0115] In a possible implementation, before sending the charging request instruction to the battery management system, the method further includes:

[0116] Send a high-level signal to the battery management system to wake up the battery management system.

[0117] In a possible implementation, the apparatus further includes:

[0118] The sending unit 403 is configured to send a first stop charging instruction to the battery management system if it is determined that the voltage value representing the voltage state of the photovoltaic module is less than a second preset threshold value, wherein the first stop charging instruction is used to instruct to stop charging the power battery; the battery management system is configured to control the first relay to be disconnected after receiving the first stop charging instruction;

[0119] The first receiving unit 404 is configured to receive a feedback signal sent by the battery management system and disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery; wherein the feedback signal indicates that charging of the power battery has stopped.

[0120] In a possible implementation, the apparatus further includes:

[0121] The second receiving unit 405 is configured to receive a stop charging signal sent by the battery management system; wherein the stop charging signal indicates a request to stop charging the power battery, and the stop charging signal is issued when the power battery is determined to be in an unchargeable state, and the stop charging signal is issued after the battery management system controls the first relay to be disconnected;

[0122] The first processing unit 406 is configured to disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery.

[0123] In a possible implementation, the apparatus further includes:

[0124] The second processing unit 407 is configured to shut down the vehicle step-down DC / DC when determining that the battery voltage status indicates that the battery voltage is greater than or equal to a first preset threshold, so as to disconnect the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery.

[0125] This embodiment provides a battery charging device for a vehicle, which can execute the method provided in the above method embodiment. Its implementation principle and technical effects are similar, and are not described in detail in this embodiment.

[0126] Figure 5 This is a schematic diagram of the structure of a photovoltaic controller provided in this application. Figure 5 As shown, the electronic device 50 provided in this embodiment includes: at least one processor 501 and a memory 502. Optionally, the device 50 further includes a communication component 503. The processor 501, the memory 502 and the communication component 503 are connected via a bus 504.

[0127] In a specific implementation process, at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that the at least one processor 501 performs the above method.

[0128] The specific implementation process of the processor 501 can be found in the above method embodiment. Its implementation principle and technical effects are similar and will not be repeated here in this embodiment.

[0129] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly implemented by a hardware processor or implemented by a combination of hardware and software modules in the processor.

[0130] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory.

[0131] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be classified into address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just one type of bus.

[0132] The present application also provides a battery charging system for a vehicle, such as Figure 6 As shown, the battery charging system 60 for a vehicle provided in this embodiment includes: a photovoltaic module 601, a photovoltaic controller 602, a power battery 603, a vehicle step-down DC / DC 604, and a storage battery 605, wherein the photovoltaic controller 602 is respectively connected to the photovoltaic module 601, the power battery 603, the storage battery 605, and the vehicle step-down DC / DC 604 in the vehicle, and the power battery 603 is connected to the storage battery 605 through the vehicle step-down DC / DC 604.

[0133] The present application also provides a battery charging system 2 for a vehicle, such as Figure 7As shown, the battery charging system 70 for a vehicle provided in this embodiment includes: a photovoltaic module 701, a photovoltaic controller 702, a second relay 703, a boost DC / DC 704, a battery management system 705, a first relay 706, a power battery 707, a vehicle-wide buck DC / DC 708, and a storage battery 709, wherein the photovoltaic controller 702 is respectively connected to the photovoltaic module 701, the power battery 707, the storage battery 709, and the vehicle-wide buck DC / DC 708 in the vehicle, the power battery 707 is connected to the storage battery 709 via the vehicle-wide buck DC / DC 708, the photovoltaic controller 702 is connected to the battery management system 705 in the vehicle, and the battery management system 705 is connected to the power battery 707 via the first relay 706; the photovoltaic controller 702 is provided with a second relay 703 and a boost DC / DC 704 connected to each other, the photovoltaic module 701 is connected to the second relay 703, and the boost DC / DC 704 is connected to the battery management system 705.

[0134] The present application also provides a vehicle, in which a battery charging system for the vehicle is provided.

[0135] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0136] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0137] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile memory device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0138] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0139] The division of units is merely a logical functional division; actual implementations may employ alternative divisions, such as combining or integrating multiple units or components into another system, or omitting or disabling certain features. Furthermore, any direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units, either through an interface, electrical, mechanical, or other means.

[0140] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0141] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0142] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0143] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0144] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A battery charging method for a vehicle, characterized in that: The method is applied to a photovoltaic controller in a vehicle, wherein the photovoltaic controller is respectively connected to a photovoltaic module, a power battery, a storage battery, and a vehicle step-down DC / DC in the vehicle, and the power battery is connected to the storage battery via the vehicle step-down DC / DC. The method comprises: In the process of controlling the photovoltaic components in the vehicle to charge the power battery in the vehicle, detecting the voltage state of the battery in the vehicle; When it is determined that the voltage state of the battery indicates that the battery voltage is less than a first preset threshold, the vehicle step-down DC / DC is controlled to be turned on, so that the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery are conductive, so that the power battery charges the battery through the vehicle step-down DC / DC.

2. The method according to claim 1, characterized in that Controlling the vehicle step-down DC / DC to start, including: Power is supplied to the internal chip of the vehicle step-down DC / DC to wake up the vehicle step-down DC / DC and turn it on.

3. The method according to claim 1, characterized in that The photovoltaic controller is connected to a battery management system in the vehicle, and the battery management system is connected to the power battery via a first relay; Control the photovoltaic panels in the vehicle to charge the power battery in the vehicle, including: In response to a trigger signal, controlling the photovoltaic controller to turn on; wherein the trigger signal indicates that the voltage value of the photovoltaic component is greater than or equal to a second preset threshold; A charging request instruction is sent to the battery management system so that the photovoltaic assembly charges the power battery through the photovoltaic controller, the battery management system, and the first relay; wherein the charging request instruction indicates that the power battery needs to be charged; the battery management system is used to close the first relay so that the battery management system is connected to the power battery through the first relay.

4. The method according to claim 3, characterized in that The photovoltaic controller is provided with a second relay and a boost DC / DC connected to each other, the photovoltaic module is connected to the second relay, and the boost DC / DC is connected to the battery management system; sending a charging request instruction to the battery management system so that the photovoltaic module charges the power battery through the photovoltaic controller, the battery management system, and the first relay, including: sending a charging request instruction to the battery management system; wherein the charging request instruction is also used by the battery management system to obtain the status of the power battery; when the status of the power battery indicates that the power battery is in a chargeable state, the battery management system is used to close the first relay; receiving a charging permission signal sent by the battery management system; wherein the charging permission signal indicates that the power battery can be charged; The second relay in the photovoltaic controller is turned off, and the boost DC / DC in the photovoltaic controller is awakened, so that the photovoltaic component is connected to the battery management system through the photovoltaic controller. Then, the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system, and the first relay.

5. The method according to claim 4, characterized in that Before sending the charging request instruction to the battery management system, the method further includes: A high level signal is sent to the battery management system to wake up the battery management system.

6. The method according to claim 4, characterized in that The method further comprises: If it is determined that the voltage value represented by the voltage state of the photovoltaic assembly is less than a second preset threshold, a first stop charging instruction is sent to the battery management system, wherein the first stop charging instruction is used to instruct to stop charging the power battery; the battery management system is configured to control the first relay to be disconnected after receiving the first stop charging instruction; Receive a feedback signal sent by the battery management system and disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery; wherein the feedback signal indicates that charging of the power battery has stopped.

7. The method according to claim 4, characterized in that The method further comprises: receiving a stop charging signal sent by the battery management system; wherein the stop charging signal indicates a request to stop charging the power battery, the stop charging signal is issued when it is determined that the state of the power battery indicates that the power battery is in an unrechargeable state, and the stop charging signal is issued after the battery management system controls the first relay to be disconnected; The second relay in the photovoltaic controller is disconnected to stop supplying power to the power battery.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: When it is determined that the voltage state of the battery indicates that the battery voltage is greater than or equal to a first preset threshold, the vehicle step-down DC / DC is turned off to disconnect the voltage paths of the power battery, the vehicle step-down DC / DC, and the battery.

9. A battery charging device for a vehicle, characterized in that: The device is applied to a photovoltaic controller in a vehicle. The photovoltaic controller is respectively connected to the photovoltaic components, power battery, storage battery, and vehicle step-down DC / DC in the vehicle. The power battery is connected to the storage battery via the vehicle step-down DC / DC. The device includes: A detection unit, configured to detect a voltage state of a battery in the vehicle while controlling the photovoltaic assembly in the vehicle to charge the power battery in the vehicle; The control unit is configured to, when determining that the voltage state of the battery indicates that the battery voltage is less than a first preset threshold, control the vehicle step-down DC / DC to turn on, so that a voltage path among the power battery, the vehicle step-down DC / DC, and the battery is conductive, so that the power battery charges the battery through the vehicle step-down DC / DC.

10. The device according to claim 9, characterized in that The control unit comprises: The wake-up module is used to supply power to the internal chip of the vehicle step-down DC / DC to wake up the vehicle step-down DC / DC and turn it on.

11. The device according to claim 9, characterized in that The photovoltaic controller is connected to a battery management system in the vehicle, and the battery management system is connected to the power battery via a first relay; The detection unit comprises: A control module, configured to control the photovoltaic controller to turn on in response to a trigger signal; wherein the trigger signal indicates that the voltage value of the photovoltaic module is greater than or equal to a second preset threshold; A charging module is configured to send a charging request instruction to the battery management system so that the photovoltaic assembly charges the power battery through the photovoltaic controller, the battery management system, and the first relay; wherein the charging request instruction indicates that the power battery needs to be charged; and the battery management system is configured to close the first relay so that the battery management system is connected to the power battery through the first relay.

12. The device according to claim 11, characterized in that The photovoltaic controller is provided with a second relay and a boost DC / DC connected to each other, the photovoltaic assembly is connected to the second relay, and the boost DC / DC is connected to the battery management system; the charging module includes: sending a charging request instruction to the battery management system; wherein the charging request instruction is also used by the battery management system to obtain the status of the power battery; when the status of the power battery indicates that the power battery is in a chargeable state, the battery management system is used to close the first relay; receiving a charging permission signal sent by the battery management system; wherein the charging permission signal indicates that the power battery can be charged; The second relay in the photovoltaic controller is turned off, and the boost DC / DC in the photovoltaic controller is awakened, so that the photovoltaic component is connected to the battery management system through the photovoltaic controller. Then, the photovoltaic component charges the power battery through the photovoltaic controller, the battery management system, and the first relay.

13. The device according to claim 12, characterized in that Before sending the charging request instruction to the battery management system, the method further includes: A high level signal is sent to the battery management system to wake up the battery management system.

14. The device according to claim 12, characterized in that The device further comprises: a sending unit, configured to send a first stop charging instruction to the battery management system if it is determined that the voltage value representing the voltage state of the photovoltaic assembly is less than a second preset threshold, wherein the first stop charging instruction is used to instruct to stop charging the power battery; and the battery management system is configured to control the first relay to be disconnected after receiving the first stop charging instruction; The first receiving unit is configured to receive a feedback signal sent by the battery management system and disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery; wherein the feedback signal indicates that charging of the power battery has stopped.

15. The device according to claim 12, characterized in that The device further comprises: a second receiving unit, configured to receive a stop charging signal sent by the battery management system; wherein the stop charging signal indicates a request to stop charging the power battery, the stop charging signal is issued when it is determined that the power battery is in an unchargeable state, and the stop charging signal is issued after the battery management system controls the first relay to be disconnected; The first processing unit is configured to disconnect the second relay in the photovoltaic controller to stop supplying power to the power battery.

16. The device according to any one of claims 9 to 15, characterized in that The device further comprises: The second processing unit is configured to shut down the vehicle step-down DC / DC when determining that the voltage state of the battery indicates that the battery voltage is greater than or equal to a first preset threshold, so as to disconnect the voltage paths among the power battery, the vehicle step-down DC / DC, and the battery.

17. A photovoltaic controller, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 8.

18. A battery charging system for a vehicle, characterized in that: include: The photovoltaic controller, photovoltaic module, power battery, storage battery, and vehicle step-down DC / DC according to claim 17; The photovoltaic controller is respectively connected to the photovoltaic components, power battery, storage battery and vehicle step-down DC / DC in the vehicle, and the power battery is connected to the storage battery through the vehicle step-down DC / DC.

19. A vehicle, characterized in that: The vehicle is provided with the battery charging system for a vehicle according to claim 18 .

20. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 8 when executed by a processor.

21. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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