Battery protection method and device of hybrid power vehicle and vehicle

Abstract

The invention relates to a battery protection method and device of a hybrid power vehicle and the vehicle. The method comprises the steps that under the condition that the electric quantity of a power battery of the hybrid power vehicle is continuously reduced, the real-time remaining electric quantity of the power battery and vehicle parameters of the hybrid power vehicle are obtained; wherein the vehicle parameters at least comprise at least one of fuel tank liquid level information of the hybrid power vehicle, a vehicle state and a battery state of a power battery; determining a target electric quantity threshold value matched with the real-time residual electric quantity from a plurality of preset electric quantity threshold values, and determining a corresponding battery protection strategy according to the target electric quantity threshold value and the vehicle parameters; and executing the battery protection strategy to prevent the power battery of the hybrid vehicle from feeding. By adopting the method, power feeding of the power battery of the hybrid vehicle can be prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery protection method, device and vehicle for a hybrid vehicle. BACKGROUND

[0002] The hybrid electric vehicle can continue to drive for a period of time by using the power of the power battery after the fuel is exhausted, at this time the hybrid electric vehicle is converted into an electric vehicle, and the hybrid electric vehicle can effectively alleviate the defects of the electric vehicle.

[0003] However, in the case of continuous consumption of the power of the hybrid electric vehicle, the vehicle cannot be refueled or externally charged in time, which will cause the high-voltage battery of the hybrid electric vehicle to feed power, and when the high-voltage battery feeds power, the vehicle cannot start the engine and cannot drive. Moreover, when the power battery feeds power, it can only be returned to the factory for repair, which brings inconvenience to the user. Therefore, a protection scheme is needed to prevent the battery from feeding power. SUMMARY

[0004] Therefore, it is necessary to provide a battery protection method, device, computer equipment, computer readable storage medium and computer program product for a hybrid vehicle, which can prevent the power battery of the hybrid vehicle from feeding power.

[0005] In a first aspect, the present application provides a battery protection method for a hybrid vehicle, comprising:

[0006] In the case that the power of the power battery of the hybrid vehicle is continuously reduced, the real-time residual power of the power battery and the vehicle parameters of the hybrid vehicle are obtained; wherein the vehicle parameters at least include at least one of the tank liquid level information, the vehicle state and the battery state of the power battery of the hybrid vehicle;

[0007] A target power threshold value matched with the real-time residual power is determined from a plurality of preset power threshold values, and a corresponding battery protection strategy is determined according to the target power threshold value and the vehicle parameters;

[0008] The battery protection strategy is executed to prevent the power battery of the hybrid vehicle from feeding power.

[0009] In one embodiment, the battery protection strategy corresponding to the target power threshold value is determined according to the vehicle parameters, comprising:

[0010] In the case that the target power threshold value is a first target power threshold value, if the vehicle state in the vehicle parameters is a high-voltage power-on state and the battery state is power battery discharging, a first battery protection strategy of the power battery is determined;

[0011] The first battery protection strategy includes: if the discharge duration of the power battery continues for a preset discharge duration, then the electrical connection between the power battery and the high-voltage system of the hybrid vehicle is cut off, and the vehicle state is adjusted to a high-voltage off-state.

[0012] In one embodiment, determining the battery protection strategy corresponding to the target battery capacity threshold based on the vehicle parameters includes:

[0013] If the target power threshold is the first target power threshold, and if the vehicle status in the vehicle parameters is a high-voltage power-off state and the fuel tank level information is not the preset level information, then the second battery protection strategy for the power battery is determined.

[0014] The second battery protection strategy includes: prohibiting the hybrid vehicle from receiving high voltage and prohibiting the hybrid vehicle from starting.

[0015] In one embodiment,

[0016] The step of determining the battery protection strategy corresponding to the target battery capacity threshold based on the vehicle parameters includes:

[0017] If the target power threshold is the second target power threshold, and the battery status in the vehicle parameters is that the power battery is idle and the vehicle status is that the high voltage is off, then a third battery protection strategy for the power battery is determined; the second target power threshold is less than the first target power threshold.

[0018] The battery protection strategy includes: prohibiting the high voltage of the power battery from being applied to the high voltage system of the hybrid vehicle, and displaying at least one of the following prompts on the display interface of the hybrid vehicle: low battery, unable to start, or contact after-sales service provider.

[0019] In one embodiment, the method further includes:

[0020] In response to a diagnostic command triggered by the after-sales service provider, the controller of the hybrid vehicle releases the permission restriction, and the hybrid vehicle is put into a start-allowed state;

[0021] In response to a triggered fuel start command, the high voltage of the hybrid vehicle is energized to start the engine of the hybrid vehicle at a preset power, and the engine is ignited at a preset injection ignition time; the preset power is less than the power of the engine during normal operation, and the preset injection ignition time is earlier than the injection ignition time of the engine during normal operation.

[0022] In one embodiment, the method further includes:

[0023] If, after the hybrid vehicle has started successfully, the engine is detected to be unable to meet the continuous power consumption required for the normal operation of the hybrid vehicle, the engine will be stopped.

[0024] Secondly, this application also provides a battery protection device for a hybrid vehicle, comprising:

[0025] The data acquisition module is used to acquire the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle when the power battery power of the hybrid vehicle continues to decrease; wherein the vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and battery status of the power battery.

[0026] The battery protection module is used to determine a target power threshold that matches the real-time remaining power from a plurality of preset power thresholds, determine a corresponding battery protection strategy based on the target power threshold and the vehicle parameters, and execute the battery protection strategy to prevent the power battery of the hybrid vehicle from being depleted.

[0027] Thirdly, this application also provides a vehicle, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0028] When the power battery of the hybrid vehicle continues to decrease, the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle are obtained; wherein, the vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and battery status of the power battery.

[0029] A target battery threshold matching the real-time remaining battery power is determined from multiple preset battery power thresholds, and a corresponding battery protection strategy is determined based on the target battery power threshold and the vehicle parameters.

[0030] The battery protection strategy is implemented to prevent the power battery of the hybrid vehicle from being depleted.

[0031] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0032] When the power battery of the hybrid vehicle continues to decrease, the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle are obtained; wherein, the vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and battery status of the power battery.

[0033] A target battery threshold matching the real-time remaining battery power is determined from multiple preset battery power thresholds, and a corresponding battery protection strategy is determined based on the target battery power threshold and the vehicle parameters.

[0034] The battery protection strategy is implemented to prevent the power battery of the hybrid vehicle from being depleted.

[0035] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0036] When the power battery of the hybrid vehicle continues to decrease, the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle are obtained; wherein, the vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and battery status of the power battery.

[0037] A target battery threshold matching the real-time remaining battery power is determined from multiple preset battery power thresholds, and a corresponding battery protection strategy is determined based on the target battery power threshold and the vehicle parameters.

[0038] The battery protection strategy is implemented to prevent the power battery of the hybrid vehicle from being depleted.

[0039] The aforementioned battery protection method, device, vehicle, computer-readable storage medium, and computer program product for hybrid vehicles acquire the real-time remaining charge of the power battery and vehicle parameters of the hybrid vehicle when the power battery charge of the hybrid vehicle continuously decreases. The vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and power battery status. A target charge threshold matching the real-time remaining charge is determined from multiple preset charge thresholds. Based on the target charge threshold and vehicle parameters, a corresponding battery protection strategy is determined. The battery protection strategy is executed to prevent the power battery of the hybrid vehicle from being discharged. This method, when preventing the power battery from being discharged, determines the corresponding battery protection strategy based on the target current threshold corresponding to the current real-time remaining charge and the vehicle parameters. That is, it can perform corresponding control based on the actual battery charge and the actual vehicle situation to maintain the charge and prevent battery discharge. Therefore, this method can prevent the battery charge from decreasing over time when the real-time remaining charge meets preset conditions, avoiding the situation where the battery charge cannot be maintained at a certain value, leading to over-discharge and battery damage. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a flowchart illustrating a battery protection method for a hybrid vehicle in one embodiment.

[0042] Figure 2 This is a flowchart illustrating a battery protection method for a hybrid vehicle in another embodiment.

[0043] Figure 3 This is a structural block diagram of a battery protection device for a hybrid vehicle in one embodiment;

[0044] Figure 4 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] HEV (Hybrid Electric Vehicle) vehicles lack plug-in charging capabilities and rely solely on the engine-driven electric motor to charge the high-voltage battery. When the high-voltage battery is depleted, the vehicle cannot start and will be unable to move. Therefore, strategies have been proposed to prevent battery depletion.

[0047] Understandably, for HEV vehicles, when users move the car slightly or frequently start and stop it, the battery charge is constantly being depleted without replenishment, leading to further decline. When the charge falls below a certain level, the vehicle will not start. Even at a dealership, without specific solutions, service personnel will be unable to start the vehicle. For PHEV vehicles, if the charging gun is not plugged in continuously, the battery will also become too low after prolonged use, potentially damaging the battery.

[0048] It's important to note that in hybrid vehicles, when the vehicle enters the power-ready state, the high-voltage battery needs to charge the capacitors of the motor controller and other high-voltage accessories, which consumes some power. Then, due to the low state of charge (SOC), the engine will be started to charge the battery. Starting the engine also consumes some power. After the engine starts, if it can continuously charge the battery for a period of time, the battery's charge will increase. However, if the driver immediately turns off the engine, or briefly moves the vehicle and then turns it off, the battery's charge time is too short, and the battery's charge cannot be replenished, leading to further depletion. After repeating this several times, the battery will become completely depleted. This will cause the battery to report a fault, indicating that the battery charge is too low to pre-charge to the high voltage. In this case, the vehicle will need to be taken to a repair shop to replace the high-voltage battery.

[0049] However, related technologies do not propose corresponding strategies to prevent battery depletion in the aforementioned scenarios. Therefore, a battery protection method for hybrid vehicles is proposed. This method addresses the situation where the real-time remaining charge of the hybrid vehicle's power battery is less than a predetermined value, and considers the possibility that the real-time remaining charge gradually decreases over time and cannot be recharged when it is less than the predetermined value. This protects the power battery from damage and avoids the need to replace high-voltage battery components at a repair shop due to battery failure.

[0050] In one embodiment, such as Figure 1 As shown, a battery protection method for a hybrid vehicle is provided. This embodiment illustrates the method applied to a terminal, which can be a vehicle. It is understood that this method can also be applied to a server, or to a system including both a terminal and a server, and implemented through interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0051] Step 102: When the power battery of the hybrid vehicle continues to decrease, obtain the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle; wherein, the vehicle parameters include at least one of the following: fuel tank level information of the hybrid vehicle, vehicle status, and battery status of the power battery.

[0052] The power battery, also known as a high-voltage battery, refers to the battery system used in hybrid vehicles to store and provide high-voltage electrical energy. Unlike the low-voltage batteries used in traditional gasoline vehicles, high-voltage batteries can have voltages above 200 volts, depending on specific requirements. For example, some plug-in hybrid electric vehicles have high-voltage batteries with voltages reaching around 300 volts.

[0053] Fuel tank level information can be understood as real-time or static data on the amount of fuel remaining in the fuel tank of a vehicle or other equipment (such as a generator, fuel tank, etc.). It is usually measured by sensors and displayed on the instrument panel, central control screen or remote monitoring system.

[0054] Battery status can include charging and discharging states. Discharging of the power battery occurs when the vehicle starts or charges, requiring high-voltage energization of the internal onboard high-voltage devices. This involves applying the high voltage of the power battery to these devices; in this case, the hybrid vehicle's state is "high voltage applied." Correspondingly, the hybrid vehicle's state is "high voltage deactivated," which refers to disconnecting the high-voltage battery from the high-voltage system (such as the motor or inverter) and ensuring the safe release of electrical energy in the high-voltage circuit. The hybrid vehicle's state includes at least two states: high voltage applied and high voltage deactivated. Obtaining the real-time remaining charge of the power battery and the vehicle parameters of the hybrid vehicle can be achieved using existing methods, which will not be elaborated upon here.

[0055] Step 104: Determine the target battery threshold that matches the real-time remaining battery power from multiple preset battery power thresholds, and determine the corresponding battery protection strategy based on the target battery power threshold and vehicle parameters.

[0056] The preset battery power thresholds can include at least a first target battery power threshold, a second target battery power threshold, and a third target battery power threshold. It is understood that the power supply of a hybrid vehicle exists in different ranges, representing different battery states. These ranges can include the real-time remaining battery power being less than the preset remaining battery power range for normal use, the real-time remaining battery power being less than the first target battery power threshold, the real-time remaining battery power being less than the second target battery power threshold, and the real-time remaining battery power being less than the third target battery power threshold indicating battery damage. The first target battery power threshold is greater than the second target battery power threshold; for example, a first target battery power threshold of 28% is greater than a second target battery power threshold of 25%. The second target battery power threshold can be a safety threshold; if the remaining battery power is less than the second target battery power threshold, special operations can be performed to force high-voltage power on and start the engine. It is understood that if the real-time remaining battery power is less than the third target battery power threshold, i.e., the minimum battery power threshold, the high-voltage battery is damaged and in a faulty state, requiring replacement of the high-voltage battery components.

[0057] For example, the preset remaining battery capacity range for normal use is 30%-72%, or other ranges within the preset range where the difference from 30%-72% is less than or equal to this range. Taking the preset remaining battery capacity range of 30%-72% as an example, within this range, 38%-72% corresponds to the normal energy management interval. When the remaining battery capacity is less than 38%, the engine will start to charge the battery; during vehicle operation, the engine will enter parallel mode, driving P2 to charge the high-voltage battery; and coasting or braking will recover energy to charge the high-voltage battery. If the remaining battery capacity is less than 38% but not less than a preset value (e.g., 30%), the real-time remaining battery capacity will decrease over time, and the motor's power usage will be limited based on the battery's output power. The specific limiting method can be set according to actual needs and will not be elaborated here. If the remaining battery capacity is less than the preset value, a corresponding protection strategy will be determined based on the real-time remaining battery capacity, battery status, and vehicle status to prevent damage to the battery if it becomes unchargeable.

[0058] The battery protection strategy includes a first battery protection strategy when the remaining battery charge is less than a first target charge threshold, the battery state is power battery discharging, and the vehicle state is high voltage power-on; a second battery protection strategy when the real-time remaining charge is less than the first target charge threshold, the battery state is power battery idle, and the vehicle state is high voltage power-off; and a third battery protection strategy when the real-time remaining charge is less than the second target charge threshold, the battery state is power battery idle, and the vehicle state is high voltage power-off.

[0059] For example, if the real-time remaining power meets the preset conditions, but the real-time remaining power cannot be maintained and gradually decreases over time, then the battery protection strategy of the power battery is determined based on the vehicle status and battery status.

[0060] Step 106: Implement a battery protection strategy to prevent the hybrid vehicle's power battery from being depleted.

[0061] For example, when the hybrid vehicle is in Driving mode, if the real-time remaining battery power is less than the preset remaining battery power range for normal use, for example, if the real-time remaining battery power drops below 30%, the engine will be forcibly started to charge the high-voltage battery, and a prompt message will be generated. This prompt message can be displayed on the instrument panel, and the prompt message could be: "Current battery power is low; keep the engine running to charge the high-voltage battery." Furthermore, if the high-voltage battery power cannot be maintained and the power decreases over time, to prevent battery damage due to depletion, a target battery power threshold matching the real-time remaining battery power needs to be determined from multiple preset battery power thresholds. Based on the target battery power threshold and vehicle parameters, a battery protection strategy for the power battery is determined to control the high-voltage battery power consumption and save energy.

[0062] In the aforementioned battery protection method for hybrid vehicles, when the power battery charge of the hybrid vehicle continuously decreases, the real-time remaining power charge of the power battery and the vehicle parameters of the hybrid vehicle are obtained. The vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and power battery status. A target power threshold matching the real-time remaining power charge is determined from multiple preset power charge thresholds. Based on the target power charge threshold and the vehicle parameters, a corresponding battery protection strategy is determined. The battery protection strategy is executed to prevent the power battery of the hybrid vehicle from being discharged. This method, when preventing the power battery from being discharged, determines the corresponding battery protection strategy based on the target current threshold corresponding to the current real-time remaining power charge and the vehicle parameters. That is, it can perform corresponding control based on the actual battery charge and the actual vehicle situation to maintain the power charge and prevent battery discharge. Therefore, this method can prevent the battery charge from decreasing over time when the real-time remaining power charge meets preset conditions, avoiding the situation where the battery charge cannot be maintained at a certain value, leading to over-discharge and battery damage.

[0063] If the real-time remaining power is less than a preset value, and the power battery cannot be charged, and / or the real-time remaining power of the power battery decreases over time, then to prevent the power battery from running out of power, the following protection strategies exist, specifically including the following situations:

[0064] Scenario 1: When the target power threshold is the first target power threshold, if the vehicle status in the vehicle parameters is high voltage power-on state and the battery status is power battery discharge state, then the first battery protection strategy for the power battery is determined; the first battery protection strategy includes: if the discharge time of the power battery continues to the preset discharge time, then the electrical connection between the power battery and the high voltage system of the hybrid vehicle is cut off, and the vehicle status is adjusted to high voltage power-off state.

[0065] The first target battery charge threshold can be 28%. For example, if the remaining battery charge (SOC) is lower than the first target charge threshold of 28%, and the battery is continuously discharging for a preset discharge time, then the high-voltage power-off is controlled, i.e., the electrical connection between the power battery and the high-voltage system of the hybrid vehicle is cut off, and the vehicle state is adjusted to a high-voltage power-off state. Further, when the SOC is greater than the first target charge threshold of 28%, there will be a 60-second power-off delay; therefore, for cases where the SOC is less than the first target charge threshold, to reduce power loss, the power-off time can be shortened to less than 60 seconds. For example, when the SOC is less than 28%, the high-voltage power-off delay time is shortened to 20 seconds. Alternatively, the high-voltage power-off delay time can also be shortened to 10 seconds or 30 seconds, etc.

[0066] For example, if the remaining battery power is less than 28%, a forced high voltage will be applied if the battery is detected as not charging. Furthermore, if the remaining battery power is below 28%, the high voltage will be applied 20 seconds after the system power-off, meaning the high voltage power-off delay is shortened to 20 seconds. This also prevents unexpected situations from occurring when the high voltage circuit is disconnected. This method can prevent the battery from being over-discharged and losing power when it cannot be charged.

[0067] Scenario 2: When the target power threshold is the first target power threshold, if the vehicle status in the vehicle parameters is a high-voltage power-off state and the fuel tank level information is not the preset level information, then the second battery protection strategy for the power battery is determined; the second battery protection strategy includes: prohibiting the hybrid vehicle from being connected to high voltage and prohibiting the hybrid vehicle from starting.

[0068] The preset fuel level information can be the minimum fuel quantity required for normal start-up and high-pressure operation of a hybrid vehicle. The minimum fuel quantity can be represented by the fuel level, for example, the preset fuel quantity is 3% of the fuel level. Optionally, high-pressure operation can proceed normally even when the fuel level is greater than 3%.

[0069] For example, if the remaining battery charge (SOC) is below the first target charge threshold of 28%, the battery is in a resting state, and the vehicle is in a high-voltage charging state. If the remaining fuel level of the hybrid vehicle is less than 3% of the fuel level, then the hybrid vehicle is prohibited from applying high voltage and from starting. This method avoids continuous discharge of the high-voltage battery, which could lead to damage due to insufficient charging. Optionally, if the real-time remaining charge of the power battery is greater than 25%, the hybrid vehicle can apply high voltage normally if the fuel level is greater than 3%, meaning the engine can reach a normal high-voltage operating state and generate sufficient power. Under normal operating conditions, the system applies high voltage for 60 seconds after power-off. If the engine is restarted during the 60-second normal shutdown period, it will drop from high voltage to low voltage after an additional 60 seconds. When the vehicle is in Reary mode, the engine can be started and charged in any gear.

[0070] Scenario 3: When the target battery level is the second target battery level, if the battery status in the vehicle parameters is "power battery idle" and the vehicle status is "high voltage off", then the third battery protection strategy for the power battery is determined; the second target battery level is less than the first target battery level; the battery protection strategy includes: prohibiting the high voltage of the power battery from being applied to the high voltage system of the hybrid vehicle, and displaying at least one of the following prompts on the hybrid vehicle's display interface: low battery level, unable to start, or contact after-sales service provider.

[0071] For example, if the real-time remaining battery power is less than the second target battery power threshold (e.g., 25%), the battery status is "power battery idle" and the vehicle status is "high voltage off". In this case, high voltage connection to the vehicle will be prohibited, meaning the high voltage of the power battery will not be applied to the high voltage system of the hybrid vehicle. The hybrid vehicle's display screen will show at least one of the following prompts: low battery, unable to start, or contact after-sales service. At this time, the high-voltage power battery cannot provide high voltage to the high-voltage generator to start the engine. Therefore, the hybrid vehicle must be started by after-sales service personnel using a diagnostic tool and diagnostic commands before high voltage connection can be allowed and the vehicle can be started. The second target battery power threshold is determined by after-sales personnel through special operations that can force high voltage connection and engine starting. For example, if the remaining battery power is between the second target battery power threshold of 25% and the third target battery power threshold of 20%, after-sales personnel can only operate the high voltage connection and engine starting 2-3 times.

[0072] Please contact your local dealer for the following steps: When the remaining battery power is less than 25% of the second target battery threshold, the service personnel should use a diagnostic tool and UDS (Unified Diagnostic Services) service request 31 to send a Routine Control request to the controller. Upon receiving this instruction, the controller will respond with "Routine Control In Progress," indicating that the controller has released the restriction and allows the vehicle to start. The service personnel should then start the vehicle. The controller will apply high voltage to start the engine. The controller will then report "Routine completed." If, due to battery failure or other reasons, high voltage cannot be applied and the vehicle cannot start, the controller will report "Routine aborted before completed." Furthermore, after the vehicle starts successfully, the service personnel need to exit the Routine Control start request.

[0073] Understandably, when the remaining battery power is less than 25% of the second target battery power threshold, it indicates a very low battery level. If the normal starting requirements of a hybrid vehicle are met, starting failure and battery depletion may occur. Therefore, unlike conventional starting methods, a low-power starting approach and an advanced engine fuel injection ignition timing control method are employed. Specifically:

[0074] In an exemplary embodiment, in response to a diagnostic command triggered by the after-sales service provider, the controller of the hybrid vehicle is deactivated, and the hybrid vehicle is placed in a start-allowed state. In response to a triggered fuel start command, the hybrid vehicle is powered on at high voltage to start its engine at a preset power level, and fuel injection is controlled at a preset ignition timing. The preset power is less than the engine's normal operating power, and the preset ignition timing is earlier than the engine's normal operating ignition timing. If, after successful starting of the hybrid vehicle, the engine is detected to be unable to meet the continuous power consumption required for normal operation of the hybrid vehicle, the engine is stopped.

[0075] The preset power is determined by reducing the power required for normal starting. Starting the hybrid vehicle's engine at the preset power, and controlling the engine's fuel injection ignition at the preset injection timing, can be manifested as: using low-power starting, reducing the target engine speed driven by the electric motor during engine start-up, and advancing the engine's fuel injection ignition timing. The specific timing of advancing the engine's fuel injection ignition and the specific power reduction value can be determined based on actual conditions, ensuring that the engine can be successfully started when the battery is low on charge. Engine starting refers to starting the engine's crankshaft to rotate through some means (such as an electric motor, manual operation, etc.), thereby driving the pistons inside the engine and putting the engine into working condition.

[0076] For example, when the real-time remaining battery power is less than 25% of the second target battery power threshold, the factory mode start-up is a non-fuel cut-off start-up mode. The battery power is used for low-power start-up and low-speed synchronous fuel injection. Because the battery power is low, the engine cannot reach high speed, so the engine is injected and started in advance. For example, the engine is injected and started after 1.2 seconds. After the motor starts the engine, if the engine cannot run normally and continues to consume power, the engine is actively stopped to avoid the motor consuming power to keep the engine running.

[0077] In the above method, when the real-time remaining power of the hybrid vehicle is low, corresponding control strategies are adopted for the power in different ranges to reduce the power consumption of the battery. When the power gradually decreases over time and cannot be recharged, the power battery is protected according to the battery status, the remaining fuel of the hybrid vehicle, and the vehicle status to prevent the battery from being damaged to the point that it needs to be replaced, thus extending the battery's service life.

[0078] In one exemplary embodiment, such as Figure 2 As shown, a battery protection method for a hybrid vehicle is provided. This embodiment illustrates the application of this method to a terminal, and includes the following steps:

[0079] Step 202: When the power battery of the hybrid vehicle continues to decrease, obtain the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle; wherein, the vehicle parameters include at least one of the following: fuel tank level information of the hybrid vehicle, vehicle status, and battery status of the power battery.

[0080] Step 204: If the target power threshold is the first target power threshold, and the vehicle status in the vehicle parameters is high voltage power-on state and the battery status is power battery discharge state, then the first battery protection strategy of the power battery is determined and executed.

[0081] Step 206: If the target power threshold is the first target power threshold, and the vehicle status in the vehicle parameters is a high-voltage power-off state and the fuel tank level information is not the preset level information, then the second battery protection strategy of the power battery is determined and executed.

[0082] Step 208: If the target battery level is the second target battery level, and the battery status in the vehicle parameters is "power battery idle" and the vehicle status is "high voltage off", then the third battery protection strategy for the power battery is determined and executed.

[0083] Step 210: In response to the diagnostic command triggered by the after-sales service provider, the controller of the hybrid vehicle releases the permission restriction, and the hybrid vehicle is put into a start-allowed state.

[0084] Step 212: In response to the triggered fuel start command, control the high voltage of the hybrid vehicle to be energized, start the engine of the hybrid vehicle with a preset power, and control the engine to inject fuel and ignite at a preset fuel injection and ignition time.

[0085] Step 214: If the engine is detected to be unable to meet the continuous power consumption required for the normal operation of the hybrid vehicle after the hybrid vehicle has started successfully, then the engine is stopped.

[0086] It should be noted that the specific implementation of this embodiment can be achieved through the methods defined above, and will not be elaborated here. In the above embodiment, when the battery power is in different ranges, a corresponding battery protection strategy is determined based on the real-time remaining power and vehicle parameters to maintain the battery power. When the real-time remaining power is less than a preset value, the power consumption is reduced and the charging rate is increased by controlling the starting method, accessory consumption, and charging power. The user is also alerted via the instrument panel. When the battery power is detected to be further reduced, high-voltage power-on is prohibited to protect the battery from damage. Furthermore, after-sales personnel can force high-voltage power-on and engine start through special operations to enable battery charging and prevent it from entering a fault state. In other words, the control methods described above reduce battery power consumption and save energy as much as possible. Simultaneously, considering the situation where the battery power is continuously depleted and cannot be charged, the system protects the battery from damage, avoiding the need to replace high-voltage battery components at a repair shop, extending battery life and reducing costs.

[0087] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0088] Based on the same inventive concept, this application also provides a battery protection device for a hybrid vehicle to implement the battery protection method for the hybrid vehicle described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more embodiments of the battery protection device for hybrid vehicles provided below can be found in the limitations of the battery protection method for hybrid vehicles described above, and will not be repeated here.

[0089] In one exemplary embodiment, such as Figure 3 As shown, a battery protection device for a hybrid vehicle is provided, including: a data acquisition module 302 and a battery protection module 304, wherein:

[0090] The data acquisition module 302 is used to acquire the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle when the power battery power of the hybrid vehicle continues to decrease; wherein, the vehicle parameters include at least one of the following: fuel tank level information of the hybrid vehicle, vehicle status, and battery status of the power battery.

[0091] The battery protection module 304 is used to determine a target energy threshold that matches the real-time remaining energy from multiple preset energy thresholds, determine the corresponding battery protection strategy based on the target energy threshold and vehicle parameters, and execute the battery protection strategy to prevent the power battery of the hybrid vehicle from being depleted.

[0092] The aforementioned battery protection device for hybrid vehicles acquires the real-time remaining charge of the power battery and vehicle parameters when the power battery charge of the hybrid vehicle continuously decreases. The vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and power battery status. A target charge threshold matching the real-time remaining charge is determined from multiple preset charge thresholds. Based on the target charge threshold and vehicle parameters, a corresponding battery protection strategy is determined. This strategy is then executed to prevent the power battery from being depleted. This method, when preventing battery depletion, determines the corresponding battery protection strategy based on the target current threshold corresponding to the current real-time remaining charge and the vehicle parameters. This means that appropriate control can be performed based on the actual battery charge and vehicle conditions to maintain charge and prevent battery depletion. Therefore, this method can prevent the battery charge from decreasing over time even when the real-time remaining charge meets preset conditions, avoiding situations where the battery charge cannot be maintained at a certain value, leading to over-discharge and battery damage.

[0093] In an exemplary embodiment, the battery protection module 304 is used to determine a first battery protection strategy for the power battery if the vehicle status in the vehicle parameters is a high-voltage power-on state and the battery status is a power battery discharge state when the target power threshold is a first target power threshold.

[0094] The first battery protection strategy includes: if the discharge time of the power battery continues for the preset discharge time, the electrical connection between the power battery and the high-voltage system of the hybrid vehicle will be cut off, and the vehicle state will be adjusted to a high-voltage off-state.

[0095] In an exemplary embodiment, the battery protection module 304 is configured to determine a second battery protection strategy for the power battery if, when the target charge threshold is a first target charge threshold, the vehicle status in the vehicle parameters is a high-voltage power-off state and the fuel tank level information is not a preset level information; the second battery protection strategy includes: prohibiting the hybrid vehicle from being powered on by high voltage and prohibiting the hybrid vehicle from starting.

[0096] In an exemplary embodiment, the battery protection module 304 is configured to determine a third battery protection strategy for the power battery if the battery status in the vehicle parameters is that the power battery is idle and the vehicle status is that the high voltage is off when the target power threshold is a second target power threshold; the second target power threshold is less than the first target power threshold.

[0097] Battery protection strategies include: prohibiting the application of the high voltage of the power battery to the high voltage system of the hybrid vehicle, and displaying at least one of the following prompts on the hybrid vehicle's display interface: low battery, unable to start, or contact after-sales service provider.

[0098] In one exemplary embodiment, the battery protection module 304 is configured to, in response to a diagnostic command triggered by an after-sales service provider, control the controller of the hybrid vehicle to release the permission restriction, and put the hybrid vehicle into a start-enabled state.

[0099] In response to a triggered fuel start command, the system controls the high-voltage power supply of the hybrid vehicle to start the engine of the hybrid vehicle at a preset power, and controls the engine to inject fuel and ignite at a preset fuel injection and ignition time; the preset power is less than the engine's normal operating power, and the preset fuel injection and ignition time is earlier than the engine's normal operating fuel injection and ignition time.

[0100] In one exemplary embodiment, the battery protection module 304 is configured to stop the engine if, after the hybrid vehicle has started successfully, it is detected that the engine cannot meet the continuous power consumption required for the normal operation of the hybrid vehicle.

[0101] The various modules in the battery protection device of the aforementioned hybrid vehicle can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware within or independently of the processor in a computer device, or stored in software within the memory of a computer device, so that the processor can call and execute the corresponding operations of each module.

[0102] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 4As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a battery protection method for a hybrid vehicle. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0103] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0104] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0105] In one embodiment, a vehicle is also provided, including a memory and a processor, the memory storing a computer program, which the processor executes to implement the steps in the above method embodiments.

[0106] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0107] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0108] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0109] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0110] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0111] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A battery protection method for a hybrid vehicle, characterized in that, The method includes: When the power battery of the hybrid vehicle continues to decrease, the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle are obtained; wherein, the vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and battery status of the power battery. A target battery threshold matching the real-time remaining battery power is determined from multiple preset battery power thresholds, and a corresponding battery protection strategy is determined based on the target battery power threshold and the vehicle parameters. The battery protection strategy is implemented to prevent the power battery of the hybrid vehicle from being depleted.

2. The method according to claim 1, characterized in that, The step of determining the battery protection strategy corresponding to the target battery capacity threshold based on the vehicle parameters includes: If the target power threshold is the first target power threshold, and the vehicle status in the vehicle parameters is high voltage power-on state and the battery status is power battery discharge state, then the first battery protection strategy for the power battery is determined. The first battery protection strategy includes: if the discharge duration of the power battery continues for a preset discharge duration, then the electrical connection between the power battery and the high-voltage system of the hybrid vehicle is cut off, and the vehicle state is adjusted to a high-voltage off-state.

3. The method according to claim 1, characterized in that, The step of determining the battery protection strategy corresponding to the target battery capacity threshold based on the vehicle parameters includes: If the target power threshold is the first target power threshold, and if the vehicle status in the vehicle parameters is a high-voltage power-off state and the fuel tank level information is not the preset level information, then the second battery protection strategy for the power battery is determined. The second battery protection strategy includes: prohibiting the hybrid vehicle from receiving high voltage and prohibiting the hybrid vehicle from starting.

4. The method according to claim 2, characterized in that, The step of determining the battery protection strategy corresponding to the target battery capacity threshold based on the vehicle parameters includes: If the target power threshold is the second target power threshold, and the battery status in the vehicle parameters is power battery idle and the vehicle status is high voltage power-off state, then a third battery protection strategy for the power battery is determined; the second target power threshold is less than the first target power threshold. The battery protection strategy includes: prohibiting the high voltage of the power battery from being applied to the high voltage system of the hybrid vehicle, and displaying at least one of the following prompts on the display interface of the hybrid vehicle: low battery, unable to start, or contact after-sales service provider.

5. The method according to claim 4, characterized in that, The method further includes: In response to a diagnostic command triggered by the after-sales service provider, the controller of the hybrid vehicle releases the permission restriction, and the hybrid vehicle is put into a start-allowed state; In response to a triggered fuel start command, the high voltage of the hybrid vehicle is energized to start the engine of the hybrid vehicle at a preset power, and the engine is ignited at a preset injection ignition time; the preset power is less than the power of the engine during normal operation, and the preset injection ignition time is earlier than the injection ignition time of the engine during normal operation.

6. The method according to claim 5, characterized in that, The method further includes: If, after the hybrid vehicle has started successfully, the engine is detected to be unable to meet the continuous power consumption required for the normal operation of the hybrid vehicle, the engine will be stopped.

7. A battery protection device for a hybrid vehicle, characterized in that, The device includes: The data acquisition module is used to acquire the real-time remaining power of the power battery and the vehicle parameters of the hybrid vehicle when the power battery power of the hybrid vehicle continues to decrease; wherein the vehicle parameters include at least one of the following: fuel tank level information, vehicle status, and battery status of the power battery. The battery protection module is used to determine a target battery threshold that matches the real-time remaining battery power from a plurality of preset battery power thresholds, and to determine a corresponding battery protection strategy based on the target battery power threshold and the vehicle parameters. The battery protection strategy is implemented to prevent the power battery of the hybrid vehicle from being depleted.

8. A vehicle comprising a memory and a processor, said memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

Images