Battery power shortage protection method, battery, vehicle and storage medium

Abstract

The invention relates to the technical field of batteries, and provides a battery power shortage protection method, a battery, a vehicle and a computer readable storage medium. According to the battery power shortage protection method, when the vehicle is requested to be failed in charging and it is detected that the battery is in the discharging state, the SOC of the battery is obtained, and whether the power battery of the vehicle normally charges the battery or not can be determined by judging the size relation between the SOC and the first SOC threshold value. If the SOC is not larger than the first SOC threshold value, it is indicated that the power battery of the vehicle cannot normally charge the battery, and at the moment, a whole vehicle power-off request is sent to the vehicle. In order to ensure that the battery can be subjected to power shortage protection, when the preset instruction returned by the vehicle according to the whole vehicle power-off request is received, the low-voltage power supply access of the battery is disconnected, so that the low-voltage power utilization module in the vehicle can be powered off, and then the battery power shortage is avoided; therefore, a battery power shortage protection scheme which can improve the user experience and is higher in intelligent degree is provided.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery power shortage protection method, a battery, a vehicle, and a computer-readable storage medium. Background Art

[0002] New energy vehicles have characteristics such as being affordable and having a high degree of intelligence, and are favored by users. Currently, most new energy vehicles are equipped with a battery that provides a low-voltage power supply. During vehicle operation, the battery can be charged by the vehicle's power battery. After the vehicle parks and enters the sleep state, this battery still needs to supply power to some functional modules in the vehicle, such as chips, electronic devices, sensors, dash cams, etc.

[0003] However, during vehicle operation, if the battery cannot be charged by the power battery, it will cause the battery to experience a power shortage due to long-term power consumption, affecting the subsequent normal use of the vehicle. It can be seen that the batteries in related vehicles have problems that are likely to affect the user experience and have a low degree of intelligence. Summary of the Invention

[0004] The purpose of this application is to provide a battery power shortage protection method, a battery, a vehicle, and a computer-readable storage medium, aiming to provide a battery power shortage protection solution that can improve the user experience and has a higher degree of intelligence.

[0005] In the first aspect of the embodiments of this application, a battery power shortage protection method is provided, which is applied to a battery configured in a vehicle to provide a low-voltage power supply. The method includes:

[0006] When the battery fails to request charging from the vehicle and it is detected that the battery is in a discharging state, obtain the state of charge (SOC) of the battery;

[0007] If the SOC is not greater than a first SOC threshold, send a vehicle power-off request to the vehicle; where the vehicle power-off request is used to instruct the vehicle to display a prompt message, and the prompt message is at least used to prompt the user to perform a parking operation;

[0008] In response to a preset instruction returned by the vehicle according to the vehicle power-off request, disconnect the low-voltage power supply path of the battery.

[0009] A battery power loss protection method provided by an embodiment of the present application. When the request for supplementary power from the vehicle fails and it is detected that the battery is in a discharging state, the remaining battery power (State Of Charge, SOC) is obtained. By judging the size relationship between the SOC and the first SOC threshold, it can be further determined whether the power battery of the vehicle can normally charge the battery. If the SOC is not greater than the first SOC threshold, it means that the power battery of the vehicle cannot normally charge the battery. At this time, a vehicle power-off request is sent to the vehicle. Since this vehicle power-off request is used to instruct the vehicle to display a prompt message, and this prompt message is at least used to prompt the user to perform a parking operation, the user can perform or not perform the parking operation according to this prompt message. The vehicle can reflect the situation of the user performing the parking operation according to the preset instruction returned in response to the vehicle power-off request. To ensure that power loss protection can be provided for the battery, when receiving the preset instruction returned by the vehicle in response to the vehicle power-off request, by disconnecting the low-voltage power supply path of the battery, the low-voltage power consumption modules in the vehicle can be powered off, thereby avoiding the power battery of the vehicle causing power loss of the battery without charging the battery, thus providing a battery power loss protection solution that can improve the user experience and has a higher degree of intelligence.

[0010] The second aspect of the embodiment of the present application provides a battery power loss protection method, which is applied to a vehicle. The vehicle is configured with a battery, and the battery is used to provide a low-voltage power supply. The method includes:

[0011] Receiving a vehicle power-off request sent by the battery; wherein, the vehicle power-off request is triggered by the battery when the request for supplementary power fails and it is in a discharging state and the detected SOC is not greater than the first SOC threshold;

[0012] In response to the vehicle power-off request, displaying a prompt message, and the prompt message is at least used to prompt the user to perform a parking operation;

[0013] In response to the operation of the user based on the prompt message, returning a preset instruction to the battery; wherein, the preset instruction is used to instruct the battery to disconnect the low-voltage power supply path of the battery.

[0014] The third aspect of the embodiment of the present application provides a battery, a memory, a processor, and a computer program stored in the memory and operable on an energy storage converter. When the processor executes the computer program, the steps of the battery power loss protection method provided in the first aspect are implemented.

[0015] The fourth aspect of the embodiment of the present application provides a vehicle, a memory, a processor, and a computer program stored in the memory and operable on the vehicle. When the processor executes the computer program, the steps of the battery power loss protection method provided in the first aspect are implemented; or the steps of the battery supplementary power method provided in the second aspect are implemented.

[0016] The fifth aspect of the embodiments of the present application provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the steps of the battery power shortage protection method provided in the first aspect above; or implements the steps of the battery charging method provided in the second aspect above.

[0017] It can be understood that the beneficial effects of the second to fifth aspects above can be referred to the relevant descriptions in the first or second aspect above, and will not be elaborated here. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the usage environment of the battery power shortage protection method provided by the embodiments of the present application;

[0019] Figure 2 It is a flowchart of the implementation of a battery power shortage protection method provided by the embodiments of the present application;

[0020] Figure 3 It is a flowchart of the implementation of a battery power shortage protection method provided by another embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of an implementation solution of a battery power shortage protection method provided by the embodiments of the present application;

[0022] Figure 5 It is a structural block diagram of a battery provided by the embodiments of the present application;

[0023] Figure 6 It is a structural block diagram of a vehicle provided by the embodiments of the present application. Detailed Embodiments

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0026] Exemplarily, most current new energy vehicles are equipped with a battery that provides a low-voltage power supply. During vehicle operation, the power battery of the vehicle can be used to recharge this battery. After the vehicle is parked and in a dormant state, this battery still needs to supply power to some functional modules in the vehicle, such as chips, electronic devices, sensors, dash cams, etc.

[0027] However, during vehicle operation, if the battery cannot be recharged by the power battery, it will cause the battery to run out of power due to long-term power consumption, affecting the subsequent normal use of the vehicle. It can be seen that the batteries in related vehicles have problems that are likely to affect the user experience and have a relatively low level of intelligence.

[0028] To solve the above technical problems, this embodiment provides a method for protecting a battery from running out of power, which can not only improve the user experience but also have a higher level of intelligence. To facilitate understanding of the battery power loss protection method provided in this embodiment, reference can be made to Figure 1 the schematic diagram of the usage environment of the battery power loss protection method shown in

[0029] Figure 1 which shows the relationship between the battery and the vehicle. To facilitate understanding of the solution, in Figure 1 the usage environment of the battery power loss protection method can be divided into a battery side and a vehicle side according to the working principles or control entities of the battery, the low-voltage power load, and the vehicle-side battery respectively.

[0030] It can be understood that Figure 1 the battery side and the vehicle side shown in Figure 1 are only for facilitating understanding of the solution. In actual implementation, the battery and the vehicle are not isolated or separated. In addition, the battery is configured in the vehicle and provides electrical energy for the low-voltage electrical loads in the vehicle, that is, the low-voltage power supply. Based on this,

[0031] In Figure 1 the battery side includes a battery management system. The battery management system of this battery can also be called the low-voltage side battery management system and is used to control the charging and discharging operations of the battery cells. In all embodiments of this application, if there is no special description, the battery management system of the battery and the low-voltage side battery management system both refer to the battery management system in the battery. Similarly, a battery management system (not shown in the figure) can also be configured in the vehicle-side battery, and the battery management system in the power battery is a completely different battery management system from the battery management system of the battery.

[0032] Exemplarily, during vehicle driving, the battery management system / low-voltage side battery management system of the battery can utilize the electrical energy of the battery cells on the battery side to supply power to the unit modules in the battery management system / low-voltage side battery management system through the power supply unit. At the same time, it can also supply power to the low-voltage electrical loads on both sides of the vehicle, such as chips and sensors in the vehicle. During this process, the vehicle-side battery can output direct current through the DC / DC unit, and the battery management system / low-voltage side battery management system can utilize this direct current to charge the battery cells in a timely manner, thereby keeping the battery side fully charged.

[0033] However, when a module in the vehicle fails, such as the DC / DC unit fails and cannot work, or when the electrical energy of the vehicle-side battery of the vehicle is about to be exhausted, the vehicle cannot charge the battery while in operation. At this time, the battery is in a discharging state. If the vehicle-side battery cannot charge the battery in a timely manner, the battery is prone to a power shortage phenomenon after long-term discharging, affecting the subsequent normal use of the vehicle.

[0034] To avoid the battery running out of power or even suffering a power shortage, the battery power shortage protection method provided in this embodiment can be Figure 1 executed by the battery management system / low-voltage side battery management system on the battery side. When the battery management system / low-voltage side battery management system fails to request power replenishment from the vehicle and detects that the battery is in a discharging state, it obtains the remaining state of charge (SOC) of the battery. By judging the size relationship between the SOC and the first SOC threshold, it can then determine whether the vehicle's power battery can normally charge the battery. If the SOC is not greater than the first SOC threshold, it means that the vehicle's power battery cannot normally charge the battery. At this time, a vehicle power-off request is sent to the vehicle. Since this vehicle power-off request is used to instruct the vehicle to display a prompt message, and this prompt message is at least used to prompt the user to perform a parking operation, the user can perform or not perform the parking operation according to this prompt message. The vehicle can react to the situation of the user performing the parking operation according to the preset instruction returned in response to the vehicle power-off request. To ensure that the battery can be protected against power shortage, when receiving the preset instruction returned by the vehicle in response to the vehicle power-off request, by disconnecting the low-voltage power supply path of the battery, the low-voltage electrical modules in the vehicle can be powered off, thereby avoiding the vehicle's power battery causing the battery to run out of power without charging the battery, thus providing a battery power shortage protection solution that can improve the user experience and has a higher degree of intelligence.

[0035] The following only takes the battery management system in the battery as the execution subject as an example, and details a battery power shortage protection method provided in this embodiment through specific implementation manners. It can be understood that in all embodiments of the application, the battery specifically refers to Figure 1On the battery side, that is, the battery includes at least multiple battery cells, as well as a battery management system / low-voltage side battery management system. The vehicle-side battery can be the power battery of the vehicle, or it can be an additional battery pack, energy storage device, etc. configured on the vehicle, which is not limited here. Refer to Figure 2 , Figure 2 shows the implementation flowchart of a battery power shortage protection method provided by an embodiment of the present application. As Figure 2 shown, the battery power shortage protection method includes the following steps:

[0036] 110: When the request for charging from the vehicle fails and it is detected that the battery is in a discharging state, obtain the remaining battery charge SOC.

[0037] In 110, the battery requests charging from the vehicle, which means requesting to use the vehicle-side battery, such as the power battery, to charge the battery when the vehicle is in a dormant state or an operating state. The vehicle is in a non-operating state, that is, the vehicle control unit is in a dormant state and the vehicle key is in an unignited state. The vehicle being in an operating state generally refers to the vehicle being in an unturned-off state, that is, it can be understood as any state after the vehicle is ignited. For example, the vehicle is not moving after ignition or the vehicle is in a driving state, which is not limited here.

[0038] In this embodiment, when the vehicle is in an operating state, the vehicle-side battery can supply power to all loads in the vehicle. Here, all loads also include low-voltage electrical loads.

[0039] Exemplarily, in combination with Figure 1 the example, when the vehicle is in a non-operating state, such as an off state, a dormant state, etc., in order to ensure that the low-voltage electrical loads can be normally powered, the battery side uses the electrical energy of the battery cells to provide a low-voltage power supply for the low-voltage electrical loads. That is, when the vehicle is in a non-operating state, in order to enable the low-voltage electrical loads to work normally, the battery can be in a discharging state. As Figure 1 shown, a timer is provided on the battery side, and the power supply unit can be woken up regularly by this timer to supply power to the MCU. The MCU determines whether to use the vehicle-side battery to charge it according to the electrical parameters of the battery cells. Here, the electrical parameters can be the battery cell voltage, the remaining battery charge, etc., which is not limited here.

[0040] For example, when the timer wakes up the power supply unit to supply power to the MCU for the first time, at this time, since the MCU obtains that the remaining charge SOC is greater than 60%, it is determined that no charging is required.

[0041] For another example, when the power supply unit wakes up for the Nth time to supply power to the MCU, since the MCU obtains the remaining battery capacity (SOC) of 50%, it is determined that charging is required. The MCU can wake up the vehicle-side battery and / or the vehicle controller on the vehicle side through the vehicle network, and request the vehicle-side battery to output direct current through the DC / DC unit to charge the battery cells on the battery side, thereby completing the charging operation. Here, if the MCU wakes up the vehicle-side battery and / or the vehicle controller on the vehicle side through the vehicle network and requests the vehicle-side battery to output direct current through the DC / DC unit but fails to charge, it can be determined that the request for charging from the vehicle fails. In specific implementation, after requesting charging, if no charging voltage / charging current is detected, it can be determined that charging cannot be performed, and further it can be determined that the request for charging from the vehicle fails.

[0042] When the vehicle is in the running state, the vehicle-side battery can output low-voltage direct current through the DC / DC unit to supply power to low-voltage electrical loads. At this time, the battery side can also use this low-voltage direct current to charge the battery cells. That is, when the vehicle is in the running state, the vehicle-side battery can charge the battery at the same time, that is, the battery can be in the charging state. Based on this, when the vehicle is in the running state, if it is detected that the battery is in the discharging state, at least the following two situations can be determined. Specifically:

[0043] The first situation is that the power consumption demand of the low-voltage electrical load suddenly increases. For example, when suddenly adding an electrical device with a large power consumption, the voltage of the DC / DC unit is instantaneously pulled down. At this time, in order to meet the suddenly increased power consumption demand, the battery switches to the discharging state to provide a low-voltage power supply and supplies power to the low-voltage electrical load together with the DC / DC unit. Here, since the DC / DC unit can adjust the amount of electrical energy it outputs according to the low-voltage electrical load, after a period of time when the battery is in the discharging state, the DC / DC unit can adjust its output electrical energy to make the battery exit the discharging state, and the DC / DC unit supplies power to the low-voltage electrical load again. That is, when the power consumption demand of the low-voltage electrical load suddenly increases, although the battery is in the discharging state, in the subsequent process, after the battery exits the discharging state, the vehicle-side battery supplies power to the low-voltage electrical load through the DC / DC unit. In this way, the electrical energy consumed by the battery is less, and it is not necessary to request the vehicle to charge it.

[0044] In the second case, the DC / DC unit fails or the vehicle malfunctions. For example, when the DC / DC unit is open-circuited and cannot convert the electrical energy provided by the vehicle-side battery into low-voltage direct current for output, in order to ensure the normal use of low-voltage electrical loads, the battery switches to the discharge state at this time to provide a low-voltage power supply for the low-voltage electrical loads. Here, when the DC / DC unit failure has not been restored, the battery remains in the discharge state continuously. In this way, the electrical energy consumed by the battery increases over time. When the electrical energy of the battery cells on the battery side is consumed to a certain extent, the MCU on the battery side can request power replenishment from the vehicle through the vehicle network. If the request for power replenishment from the vehicle fails and it is detected that the battery is still in the discharge state, it can be determined that the DC / DC unit or the vehicle has malfunctioned. That is, in this embodiment, regardless of whether the vehicle is in the running state or the non-running state, when the request for power replenishment from the vehicle fails and it is detected that the battery is in the discharge state, obtaining the SOC of the battery can be used as a basis for determining that the DC / DC unit has malfunctioned or the vehicle has malfunctioned.

[0045] In specific implementation, obtain the battery SOC. This SOC value can be the true SOC value of the battery, or it can be the SOC value estimated through the SOC value estimation strategy or the SOC estimation algorithm.

[0046] For example, the analog front-end unit in the battery samples the electrical parameters (voltage and / or current) of the battery cells to determine the current remaining power of the battery and the current full charge capacity of the battery. Since the SOC value also reflects the percentage of the current remaining power of the battery in the current full charge capacity (Full Charge Capacity, FCC) of the battery, the true SOC value can be calculated based on the current full charge capacity of the battery and the FCC.

[0047] For another example, the analog front-end unit in the battery samples the electrical parameters (voltage and / or current) of the battery cells, and sends the sampled electrical parameters to the MCU. The MCU executes the SOC value estimation strategy or the SOC estimation algorithm to obtain the SOC value.

[0048] It is easy to understand that since in this embodiment, the battery SOC is used as a basis for judging whether the DC / DC unit has malfunctioned or the vehicle has malfunctioned, it is not required that the battery SOC has high accuracy. Therefore, in specific implementation, the SOC of the battery can also be obtained by the open-circuit voltage method, the ampere-hour integration method, and the Kalman filtering method, so no limitation is made here.

[0049] 120: If the SOC is not greater than the first SOC threshold, send a vehicle power-off request to the vehicle; where the vehicle power-off request is used to instruct the vehicle to display a prompt message, and the prompt message is at least used to prompt the user to perform a parking operation.

[0050] In 120, the first SOC threshold is used to characterize the SOC value when the battery is about to trigger the over-discharge protection mechanism.

[0051] Exemplarily, in a specific implementation, the first SOC threshold can be an SOC value corresponding to the current voltage of the battery when it is greater than the over-discharge protection voltage of the battery. For example, when the voltage of the battery at SOC of 100% is 3.8V - 3.5V, and the over-discharge protection voltage of the battery is lower than 3V, the first SOC threshold can be the SOC value corresponding to the battery when the voltage is lower than 3.5V and greater than 3.3V.

[0052] It should be noted that the battery SOC is usually comprehensively estimated through voltage, current integration (coulomb counting), temperature, etc., and the voltage curve of the battery is non-linear at low power. For example, the voltage of lithium batteries drops suddenly at low SOC, resulting in a large SOC estimation error. When the voltage of the lithium battery drops to the over-discharge protection point, the SOC may be close to 0% to 5%, that is, the SOC corresponding to the over-discharge protection voltage is usually close to 0%, but the actual remaining capacity may become smaller due to factors such as battery aging and temperature change. Based on this, using the SOC corresponding to the voltage before the battery triggers the over-discharge protection mechanism as the first SOC threshold can prevent the battery from immediately losing power or suffering from a dead battery due to over-discharge.

[0053] In this embodiment, when the SOC is not greater than the first SOC threshold, it means that the power battery of the vehicle cannot charge the battery normally. At this time, a vehicle power-off request is sent to the vehicle. Since this vehicle power-off request is used to instruct the vehicle to display a prompt message, and this prompt message is at least used to prompt the user to perform a parking operation, the user can perform or not perform a parking operation according to this prompt message. Here, when the user learns this prompt message, the user can perform a parking operation or not perform a parking operation, and at the same time, the vehicle can return a preset instruction to the battery according to the user's execution situation based on the prompt message. In all embodiments of the present application, the module in the vehicle that communicates or interacts with the battery can specifically be the vehicle controller.

[0054] It can be understood that when the SOC is not greater than the first SOC threshold, it can also be understood as the result after the battery has continuously powered the low-voltage load after the battery's request for charging from the vehicle fails, that is, the result of continuously being in a discharging state. In this way, it can be defaulted that the MCU in the battery management system of the battery has woken up the vehicle network and interacted with the vehicle controller. Based on this, in order to prevent the battery from continuously discharging and causing a dead battery, the MCU in the battery management system sends a vehicle power-off request to the vehicle controller, which can instruct the vehicle controller to make preparations for vehicle power-off on the vehicle side, that is, to prepare for disconnecting the low-voltage power supply path of the battery on the battery side.

[0055] Exemplarily, when the battery management system of the battery determines that the SOC is not greater than the first SOC threshold, it sends a vehicle power-off request to the vehicle controller of the vehicle. The vehicle controller displays a prompt message according to the vehicle power-off request to prompt the user to perform a parking operation. During actual use, the user can perform a parking operation or control the vehicle to continue running according to the prompt message. Correspondingly, after the vehicle controller displays the prompt message on the in-vehicle screen, it can return a preset instruction to the battery according to the user's operation.

[0056] 130: In response to the preset instruction returned by the vehicle according to the vehicle power-off request, disconnect the low-voltage power supply path of the battery.

[0057] In 130, the preset instruction refers to the instruction triggered by the vehicle after receiving the vehicle power-off request. Specifically, it can be the instruction returned by the vehicle controller according to the user's operation after receiving the vehicle power-off request.

[0058] In this embodiment, disconnecting the low-voltage power supply path of the battery can specifically be disconnecting the path for the battery to supply power to the low-voltage electrical load. Combining Figure 1 with the example, in the MCU in the battery management system on the battery side, the circuit breaker can be controlled to disconnect, thereby disconnecting the cell circuit in the battery. At this time, the battery no longer supplies power to the low-voltage electrical load. In this way, it is possible to avoid the battery discharging continuously and running out of power. At the same time, by disconnecting the low-voltage power supply path of the battery, the user can more intuitively learn that the vehicle is having a fault at this time, and then the user can choose to restart the vehicle after parking.

[0059] It is easy to understand that in order to avoid causing panic to the user when disconnecting the low-voltage power supply path of the battery, in some embodiments, when responding to the preset instruction returned by the vehicle according to the vehicle power-off request, a countdown message can also be sent to the vehicle controller, so that the vehicle controller can display a countdown for describing the disconnection of the low-voltage power supply path of the battery through the vehicle's screen. In this way, it is possible to intuitively prompt the user of the remaining time until the low-voltage power supply path of the battery is disconnected, and it can avoid suddenly disconnecting the low-voltage power supply path of the battery, causing all the low-voltage electrical loads of the vehicle to power off and causing panic to the user.

[0060] As an embodiment, the preset instruction includes an allow power-off instruction and a prohibit power-off instruction. Step 130 can specifically include Step 1 and Step 2. In this embodiment, Step 1 and Step 2 are parallel steps, and the execution order is not sequential. And after Step 1 is executed, Step 2 is no longer executed, or after Step 2 is executed, Step 1 is no longer executed until a new preset instruction is responded to.

[0061] Step 1: When the preset instruction is an allow power-off instruction, disconnect the low-voltage power supply path of the battery.

[0062] Step 2: When the preset instruction is a prohibited power-down instruction and a target message about the vehicle is monitored, the low-voltage power supply path of the battery is disconnected when the state of charge (SOC) is not greater than the second SOC threshold; wherein the second SOC threshold is less than the first SOC threshold.

[0063] Exemplarily, in specific implementation, when it is detected that the user performs a parking operation according to the prompt information, for example, when the user controls the vehicle to pull over and decelerate or stop, it means that the user performs a parking operation. At this time, the preset instruction may be a permitted power-down instruction indicating that the user allows the vehicle to power down. When the preset instruction is a permitted power-down instruction, it means that the user is preparing to park or has parked the vehicle, that is, it means that the vehicle power-down operation can be performed at this time.

[0064] As a possible implementation manner, when the user is preparing to park or has parked the vehicle, the vehicle controller sends a command to disconnect the high-voltage relay to the battery management system of the vehicle-side battery. After the vehicle controller receives the power-down completion instruction feedback by the battery management system of the vehicle-side battery, a high-voltage disconnection reminder is displayed through the vehicle screen. Then the vehicle controller sends a permitted power-down instruction to the battery management system of the battery.

[0065] In some embodiments, when the vehicle controller receives the power-down completion instruction feedback by the battery management system of the vehicle-side battery, after a delay period, for example, after a delay of 3 seconds, the vehicle controller controls the controllers of other modules in the vehicle to release the network through the vehicle network and enter the sleep state.

[0066] Correspondingly, step 1 may specifically include: when the preset instruction is a permitted power-down instruction and it is confirmed that the network has been released, the battery management system of the battery controls the circuit breaker to disconnect, or controls the discharge switch in the battery to disconnect. At this time, the battery also enters the sleep state.

[0067] Exemplarily, in specific implementation, when it is detected that the user does not perform a parking operation according to the prompt information, for example, when the user controls the vehicle to maintain the driving state or closes the prompt information, it means that the user does not perform a parking operation. At this time, the preset instruction may be a prohibited power-down instruction indicating that the user prohibits the vehicle from powering down.

[0068] In step 2, when the preset instruction is a prohibited power-down instruction and at the same time a target message about the vehicle is monitored, it means that the communication between the battery side and the vehicle side is normal at this time, that is, the communication between the battery management system of the battery and the vehicle controller is normal. The reason for prohibiting the vehicle from powering down is that the user does not want the vehicle to power down at this time, or the vehicle operating environment does not allow the vehicle to power down at this time. Based on this, the user is allowed to control the vehicle to drive for a period of time until the SOC is not greater than the second SOC threshold, and then the low-voltage power supply path of the battery is disconnected.

[0069] As a possible implementation manner, the second SOC threshold in step 2 is used to indicate that the current voltage of the battery is not greater than the over-discharge protection voltage of the battery.

[0070] For example, the voltage of the battery when the SOC is 100% is 3.8V to 3.5V, the over-discharge protection voltage of the battery is lower than 3V, and the first SOC threshold may be the SOC value corresponding to the battery when the voltage is lower than 3.5V and greater than 3.3V. Here, the second SOC threshold may be the SOC value corresponding to the battery when the voltage is lower than 3.3V and greater than 3V.

[0071] It is easy to understand that when the low-voltage power supply path of the battery is disconnected, the low-voltage power loads in the vehicle are powered off. Although the battery on the vehicle side may still have power, the low-voltage power loads in the vehicle, such as chips, sensors, etc., cannot work normally because the battery cannot provide low-voltage power, and the vehicle controller in the vehicle is also powered off. The reason for disconnecting the low-voltage power supply path of the battery is, firstly, to protect the battery from power loss, and secondly, considering that most vehicle faults can be eliminated after the vehicle is restarted, so after disconnecting the low-voltage power supply path of the battery, the low-voltage power loads in the vehicle stop working, which can inform the user that the vehicle may have a fault at this time, and then urge the user to trigger the restart operation after the vehicle is powered off, which helps to eliminate the vehicle fault.

[0072] The above scheme obtains the remaining power (State Of Charge, SOC) of the battery when the vehicle is in operation and detects that the battery is in a discharge state, and determines the size relationship between the SOC and the first SOC threshold value, thereby determining whether the power battery of the vehicle is normally charging the battery. If the SOC is not greater than the first SOC threshold value, it means that the power battery of the vehicle cannot charge the battery normally, and a vehicle power-off request is sent to the vehicle at this time. Since the vehicle power-off request is used to instruct the vehicle to display a prompt message, and the prompt message is at least used to prompt the user to perform a parking operation, the user can perform or not perform the parking operation according to the prompt message. The preset instruction returned by the vehicle according to the vehicle power-off request can reflect the situation in which the user performs the parking operation. In order to ensure that the battery can be protected from power failure, when the preset instruction returned by the vehicle according to the vehicle power-off request is received, the low-voltage power supply path of the battery can be disconnected, so as to prevent the vehicle's power battery from causing the battery to fail to charge the battery, thereby providing a battery power failure protection solution that can improve the user experience and is more intelligent.

[0073] As an embodiment, after step 120, the following steps are further included:

[0074] If the preset instruction returned by the vehicle according to the vehicle power-off request is not received, the low-voltage power supply path of the battery is disconnected after waiting for a preset time.

[0075] In this embodiment, if the battery management system of the battery receives a preset instruction returned by the vehicle according to the vehicle power-off request, it indicates that there may be a fault in the vehicle's vehicle network. Based on this, a preset duration can be waited for the user to perform parking control on the vehicle.

[0076] In specific implementation, the preset duration can be 30 seconds, 1 minute, 2 minutes, etc., which is not limited here.

[0077] As an embodiment, the above step: if the preset instruction returned by the vehicle according to the vehicle power-off request is not received, then after waiting for the preset duration, disconnect the low-voltage power supply path of the battery, may include:

[0078] If the preset instruction returned by the vehicle according to the vehicle power-off request is not received, then monitor the target message about the vehicle. If the target message about the vehicle is not monitored, then after waiting for the preset duration, disconnect the low-voltage power supply path of the battery.

[0079] In this embodiment, the target message about the vehicle may specifically be a message for the vehicle controller to release the vehicle network. Here, when the user controls the vehicle to perform a parking operation, the vehicle controller can control the vehicle to power off and order each module on the vehicle side to release the vehicle network, thereby triggering this target message. That is, this target message is used to indicate that the vehicle power-off is completed and / or the vehicle network is released.

[0080] If the battery management system of the battery does not receive the preset instruction returned by the vehicle according to the vehicle power-off request, then monitor the target message about the vehicle. If the battery management system of the battery does not monitor the target message about the vehicle, it indicates that there may be a fault in the vehicle's vehicle network. Based on this, after waiting for the preset duration, the low-voltage power supply path of the battery can be disconnected.

[0081] As an embodiment, after the step of disconnecting the low-voltage power supply path of the battery, it further includes:

[0082] In the case where the user triggers a hardware wake-up instruction, determine the validity of the hardware wake-up instruction. When the hardware wake-up instruction is valid, in response to the hardware wake-up instruction, conduct the low-voltage power supply path of the battery.

[0083] In this embodiment, the hardware wake-up instruction is triggered by the user operating the hardware switch of the vehicle.

[0084] It should be noted that in order to avoid accidental touch by the user, in the case where the user triggers a hardware wake-up instruction, the validity of the hardware wake-up instruction can be determined, and thus it can be distinguished whether it is an accidental touch by the user or a real and valid hardware wake-up instruction.

[0085] For example, the effective duration of the corresponding hardware wake-up instruction may be set, such as 500 milliseconds. When the duration of the hardware wake-up instruction is equal to or greater than 500 milliseconds, it indicates that the hardware wake-up instruction is effective.

[0086] For another example, the effective duration of the corresponding hardware wake-up instruction can be set, such as 500 milliseconds to 700 milliseconds. When the duration of the hardware wake-up instruction is between 500 milliseconds and 700 milliseconds, it means that the hardware wake-up instruction is effective. When the duration of the hardware wake-up instruction is greater than 700 milliseconds, it means that the hardware switch line may be stuck. At this time, the hardware wake-up instruction should be judged as invalid, so as to avoid long-term or repeated triggering of the hardware wake-up instruction due to the hardware switch stuck.

[0087] It is understandable that after disconnecting the low-voltage power supply path of the battery, the vehicle loses the low-voltage power supply, and the battery (power battery) on the vehicle side is not powered. At this time, all modules in the vehicle are in a power-off state. When the user triggers the hardware wake-up command, the vehicle side is equivalent to restarting, that is, all modules in the vehicle are equivalent to restarting after powering off, and can be initialized and restored to normal with a high probability.

[0088] As an embodiment, the hardware switch includes any one of a door handle, a lock switch, a trunk switch, a window switch, a handbrake switch, and a display switch of the vehicle.

[0089] In this embodiment, after the step of disconnecting the low-voltage power supply path of the battery, when the user triggers any of the above hardware switches, the hardware wake-up instruction can be triggered, and then the low-voltage power supply path of the battery is turned on, thereby realizing the restart operation of the vehicle. In this way, the failure of the vehicle-side battery or the failure of the DC / DC unit in the vehicle side can be eliminated with a high probability, so that after the vehicle is restarted, the vehicle-side battery can supply power to the low-voltage power load through the DC / DC unit and charge the battery at the same time.

[0090] Figure 3 FIG. 2 shows a flow chart of a method for protecting a battery from power failure according to another embodiment of the present invention. Figure 2 The difference between the embodiments is that the execution subject of the battery power-loss protection method provided in this embodiment is a vehicle equipped with a battery, and the battery is used to provide a low-voltage power supply. Figure 1 In the example shown, the execution subject of this embodiment may be a vehicle controller on the vehicle side. Figure 3 As shown, a battery low power protection method provided in this embodiment includes:

[0091] 210: receiving a vehicle power-off request sent by a battery; wherein the vehicle power-off request is triggered when the battery fails to request for power replenishment and detects that the SOC is not greater than a first SOC threshold value in a discharging state.

[0092] In 210, when the state of charge (SOC) of the vehicle is not greater than the first SOC threshold, it indicates that the power battery of the vehicle cannot charge the battery normally. At this time, the battery sends a request to power off the entire vehicle to the vehicle.

[0093] In a specific implementation, the vehicle controller in the vehicle can communicate with the battery through the vehicle network. Specifically, it can communicate with the battery management system of the battery through the vehicle network. Based on this, when the vehicle is in an operating state, the vehicle controller can receive the request to power off the entire vehicle sent by the battery management system of the battery through the vehicle network.

[0094] As an embodiment, the first SOC threshold is used to indicate that the current voltage of the battery is greater than the over-discharge protection voltage of the battery.

[0095] It can be understood that the principle, motivation, and related concept explanations for the battery to trigger this request to power off the entire vehicle have been described in detail in Figure 1 and Figure 2 In the embodiments of Figure 2 In the case where the step 210 of this embodiment corresponds to the step 120 of the embodiment shown in

[0096] 220: In response to the request to power off the entire vehicle, display a prompt message, and the prompt message is at least used to prompt the user to perform a parking operation.

[0097] In this embodiment, since this request to power off the entire vehicle is used to instruct the vehicle to display a prompt message, and the prompt message is at least used to prompt the user to perform a parking operation, the user can perform or not perform a parking operation according to this prompt message. Here, when the user learns this prompt message, the user can perform a parking operation or not perform a parking operation. At the same time, the vehicle can return a preset instruction to the battery according to the execution situation of the user based on the prompt message.

[0098] In a specific implementation, the vehicle controller can instruct the vehicle's screen to display this prompt message, thereby prompting the user to perform a parking operation.

[0099] 230: In response to the operation of the user based on the prompt message, return a preset instruction to the battery; wherein, the preset instruction is used to instruct the battery to disconnect the low-voltage power supply path of the battery.

[0100] It can be understood that the principle, motivation, and related concept explanations for the operation of the user based on the prompt message have been described in detail in Figure 1 and Figure 2 In the embodiments of Figure 2 In the case where the step 230 of this embodiment corresponds to the step 130 of the embodiment shown in

[0101] As an embodiment, after step 230, it may further include: displaying a prompt for troubleshooting the vehicle's faults or a prompt for restarting the vehicle; and / or replacing the line for charging the battery.

[0102] In this embodiment, since after returning a preset instruction to the battery, when the battery has not responded to the preset instruction to disconnect the low-voltage power supply path of the battery, a prompt for troubleshooting the vehicle's faults or a prompt for restarting the vehicle can be displayed to let the user know that the vehicle currently has a fault and needs to be restarted. And / or by replacing the line for charging the battery, after disconnecting the low-voltage power supply path of the battery and restarting the vehicle, the battery can be charged through the new line.

[0103] Refer to Figure 4 , Figure 4 shows a schematic diagram of an implementation solution of a battery power shortage protection method provided by an embodiment of the present application. In Figure 4 example, different from Figure 1 , the vehicle is provided with a hardware switch. The hardware switch is connected between the battery and the ground. The hardware switch is used for the user to trigger a hardware wake-up instruction when the battery disconnects the low-voltage power supply path of the battery.

[0104] As an embodiment, the hardware switch is specifically connected to the power supply unit in the battery. Here, the power supply unit is a low-voltage reset. When the user triggers a hardware wake-up instruction through the hardware switch, it is equivalent to conducting the path between the power supply unit and the ground. At this time, the power supply unit is reset, and then the MCU in the battery is powered. After the MCU is powered on, it controls the circuit breaker to conduct, and then the low-voltage power supply path of the battery is conducted.

[0105] In specific implementation, the ground connected by the hardware switch can be the vehicle frame, or other grounding terminals fitted in the vehicle, which is not limited here.

[0106] It is easy to understand that the execution subject of the steps provided in this embodiment is the vehicle, which can correspond to the steps in Figure 2 the embodiment. Therefore, in specific implementation, reference can be made to Figures 1 to 2 the corresponding embodiment to correspondingly implement Figure 3 the steps and effects of the battery power shortage protection method in the embodiment. Therefore, it will not be elaborated here.

[0107] Figure 5 is a structural block diagram of a battery provided by an embodiment of the present application. As Figure 5 shown, the battery 5 of this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and operable on the processor 50, such as a program for the battery power shortage protection method. When the processor 50 executes the computer program 52, it implements the steps in each of the above embodiments of the battery power shortage protection method, such as Figure 2 the steps shown. For details, please refer toFigure 2 For the relevant descriptions in the corresponding embodiments, they will not be elaborated here.

[0108] Figure 6 It is a structural block diagram of a vehicle provided by an embodiment of the present application. As Figure 6 shown, the vehicle 6 of this embodiment includes: a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and operable on the processor 60, such as a program for the battery power shortage protection method. When the processor 60 executes the computer program 62, it implements the steps in each of the above embodiments of the battery power shortage protection method, such as Figure 2 or Figure 3 the steps shown. For details, please refer to Figure 2 or Figure 3 For the relevant descriptions in the corresponding embodiments, they will not be elaborated here.

[0109] The battery and the vehicle may include, but are not limited to, a processor and a memory. Those skilled in the art can understand that Figure 5 it is only an example of the battery 5, Figure 6 it is only an example of the vehicle 6, and does not constitute a limitation on the battery 5 or the vehicle 6. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the vehicle may further include input / output devices, network access devices, buses, etc.

[0110] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0111] The memory may be the battery 5 or an internal storage unit of the vehicle 6, such as a hard disk or memory of the battery 5 or the vehicle 6. The memory may also be an external storage device of the battery 5 or the vehicle 6, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the battery 5 or the vehicle 6. Further, the memory may also include both an internal storage unit of the battery 5 or the vehicle 6 and an external storage device. The memory is used to store the computer program and other programs and data required by the vehicle. The memory may also be used to temporarily store data that has been output or will be output.

[0112] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery power-loss protection method, characterized in that: The battery is configured in a vehicle and used to provide a low voltage power supply. The method includes: When requesting the vehicle to replenish power fails and detecting that the battery is in a discharged state, obtaining the remaining power SOC of the battery; If the SOC is not greater than a first SOC threshold, a vehicle power-off request is sent to the vehicle; wherein the vehicle power-off request is used to instruct the vehicle to display prompt information, and the prompt information is at least used to prompt a user to perform a parking operation; In response to a preset instruction returned by the vehicle according to the vehicle power-off request, the low-voltage power supply path of the battery is disconnected.

2. The battery power-loss protection method according to claim 1, characterized in that: The preset instructions include a power-off permission instruction and a power-off prohibition instruction; The step of disconnecting the low-voltage power supply path of the battery in response to a preset instruction returned by the vehicle according to the vehicle power-off request comprises: When the preset instruction is the power-off permission instruction, disconnecting the low-voltage power supply path of the battery; When the preset instruction is the power-off prohibition instruction and a target message about the vehicle is monitored, the low-voltage power supply path of the battery is disconnected when the SOC is not greater than a second SOC threshold; wherein the second SOC threshold is less than the first SOC threshold.

3. The battery power-loss protection method according to claim 2, characterized in that: The first SOC threshold value is used to indicate that the current voltage of the battery is greater than the over-discharge protection voltage of the battery; and / or The second SOC threshold is used to indicate that the current voltage of the battery is not greater than the over-discharge protection voltage of the battery.

4. The battery power-loss protection method according to claim 1, characterized in that: After the step of sending the vehicle power-off request to the vehicle, the method further includes: If the preset instruction returned by the vehicle according to the vehicle power-off request is not received, the low-voltage power supply path of the battery is disconnected after waiting for a preset time.

5. The battery power-loss protection method according to claim 4, characterized in that: If the preset instruction returned by the vehicle according to the vehicle power-off request is not received, disconnecting the low-voltage power supply path of the battery after waiting for a preset time, includes: If the preset instruction returned by the vehicle according to the vehicle power-off request is not received, monitoring the target message about the vehicle; If no target message about the vehicle is monitored, the low-voltage power supply path of the battery is disconnected after waiting for a preset time.

6. The battery power-loss protection method according to any one of claims 1 to 5, characterized in that: After the step of disconnecting the low-voltage power supply path of the battery, the method further includes: When a user triggers a hardware wake-up instruction, determining the validity of the hardware wake-up instruction; When the hardware wake-up instruction is valid, in response to the hardware wake-up instruction, the low-voltage power supply path of the battery is turned on.

7. The battery power-loss protection method according to claim 6, characterized in that: The hardware wake-up instruction is triggered by a user operating a hardware switch of the vehicle, and the hardware switch includes any one of a door handle, a lock switch, a trunk switch, a window switch, a handbrake switch, and a display switch of the vehicle.

8. A battery power-loss protection method, characterized in that: In a vehicle, the vehicle is equipped with a battery, the battery is used to provide a low-voltage power supply, and the method includes: Receiving a vehicle power-off request sent by the battery; wherein the vehicle power-off request is triggered when the battery fails to request for power replenishment and detects that the SOC is not greater than a first SOC threshold in a discharging state; In response to the vehicle power-off request, displaying prompt information, wherein the prompt information is at least used to prompt the user to perform a parking operation; In response to an operation performed by the user based on the prompt information, a preset instruction is returned to the battery; wherein the preset instruction is used to instruct the battery to disconnect a low-voltage power supply path of the battery.

9. The battery power-loss protection method according to claim 8, characterized in that: After the step of returning the preset instruction to the battery, the method further includes: Display vehicle troubleshooting prompts or vehicle restart prompts; and / or Replace the circuit that charges the battery.

10. The battery power-loss protection method according to claim 8, characterized in that: The vehicle is provided with a hardware switch, which is connected between the battery and the ground. The hardware switch is used for allowing a user to trigger a hardware wake-up instruction when the battery disconnects the low-voltage power supply path of the battery.

11. The battery power-loss protection method according to claim 10, characterized in that: The hardware switch includes any one of a door handle, a lock switch, a trunk switch, a window switch, a handbrake switch and a display screen switch of the vehicle.

12. A battery, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the battery, wherein the processor implements the steps of the battery low power protection method as described in any one of claims 1 to 7 when executing the computer program.

13. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the vehicle, wherein when the processor executes the computer program, the steps of the battery low power protection method as described in any one of claims 1 to 7 are implemented; or the steps of the battery low power protection method as described in any one of claims 8 to 11 are implemented.

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