A method for controlling the anti-feedback of automobile batteries

Abstract

The present invention discloses a method for controlling the anti-power-feedback of automobile batteries. When the vehicle is powered off, the remaining fuel in the tank is obtained, and the number of power-feedback times available for charging the battery is determined according to the remaining fuel in the tank; if the number of power-feedback times is greater than a set value, the next power-feedback time is calculated, and the vehicle is dormant. When the dormant time of the vehicle reaches the next power-feedback time, the vehicle is awakened, and the battery is powered after the engine is started; if the number of power-feedback times is less than or equal to the set value, it is prompted that the fuel amount is insufficient, and the power-feedback process is exited. The present invention calculates the number of times the remaining fuel can be used to start the engine for power-feedback and the next power-feedback interval time according to the fuel amount and the vehicle's power consumption when the vehicle is powered off, and plans a power-feedback plan according to the number and interval time, and wakes up the vehicle and powers up according to the power-feedback plan; reduces the number of wake-ups as much as possible, reduces unnecessary power consumption and waste, and saves resources; at the same time, it also avoids the problem of running out of fuel due to power-feedback of the battery, causing the vehicle to break down.

Description

Technical Field

[0001] The invention belongs to the technical field of automobiles, and in particular relates to an anti-feedback control method for automobile batteries. Background Art

[0002] As a core component in the automotive electrical system, the battery plays a very important role. For traditional cars, it is used as a power supply to meet the power needs of the vehicle when the vehicle is not started. After the vehicle is powered off, due to the static current consumption of the vehicle and the self-discharge of the battery, if the vehicle is stored for a long time without use, it will cause the vehicle battery to be discharged, resulting in problems such as the vehicle being unable to start and drive again. Traditional models can replenish power by starting the engine and using the generator to generate electricity to replenish power to the low-voltage battery when the battery is low, and try to avoid problems such as long-term storage and charging of the battery. There are currently two ways to replenish power:

[0003] One is to leave the vehicle unpowered and uncharged, and then the generator will work to charge the battery after the engine is started next time. In this way, since the battery has no charge after the vehicle is unpowered, if it is left unpowered for a long time, the static power consumption of the vehicle will cause the battery to be fed back. When the vehicle is started again, the vehicle cannot be started or driven due to insufficient battery power, resulting in a breakdown.

[0004] The other is to wake up the vehicle at regular intervals when the vehicle is stationary. After waking up, if the battery is fully charged, there is no need to recharge. If the battery is not fully charged, the engine is started to recharge the battery. This method wakes up the vehicle at regular intervals regardless of whether the battery is fully charged. Waking up the vehicle increases the power consumption of the vehicle's low-voltage electrical appliances. The higher the frequency of waking up, the more electricity is wasted. The more times the engine is started, the more electricity is consumed when starting, and the more fuel is consumed. This not only wastes energy, but also pollutes the environment. In addition, the scheduled engine start may consume fuel to recharge the battery. If the fuel is exhausted, when the vehicle is started again, even if the battery is fully charged, the engine cannot be started due to exhaustion of fuel, and the vehicle cannot be driven, resulting in a breakdown. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a method for controlling the anti-feedback of an automobile battery.

[0006] The technical solution adopted by the present invention is: a method for controlling the anti-feedback of an automobile battery,

[0007] When the vehicle is powered off, the remaining fuel amount in the fuel tank is obtained, and the number of times the battery can be charged is determined based on the remaining fuel amount in the fuel tank;

[0008] If the number of charging times is greater than the set value, the next charging time is calculated, the vehicle is dormant, and when the dormant time reaches the next charging time, the vehicle is awakened, and the engine is started to charge the battery;

[0009] If the number of charging times is less than or equal to the set value, it will prompt that the fuel level is insufficient and exit the charging process.

[0010] Furthermore, the number of power replenishment times is calculated by the following formula

[0011]

[0012] Among them, N is the number of recharges; E0 is the amount of electricity that can be converted into electricity when the fuel tank is full; E1 is the amount of electricity consumed when starting the engine; E2 is the amount of electricity consumed by low-voltage accessories; E3 is the amount of electricity charged by the generator to the low-voltage battery; F1 is the threshold for starting power generation of the fuel in the tank; F2 is the threshold for stopping charging of the fuel in the tank.

[0013] Furthermore, the amount of electricity E2 consumed by the low-voltage accessory is determined by the following formula:

[0014]

[0015] Among them, U is the low-voltage battery voltage; I1 is the current consumption of the low-voltage accessories, and T0 is the single power generation time of the generator to the low-voltage battery.

[0016] Furthermore, the amount of electricity E3 charged by the generator to the low-voltage battery is determined by the following formula:

[0017]

[0018] Among them, U is the low-voltage battery voltage; I2 is the charging current of the generator to the low-voltage battery, and T0 is the single power generation time of the generator to the low-voltage battery.

[0019] Furthermore, before calculating the next power-on time, first determine whether it is the first power-off. If so, calculate the power-on time using the following formula:

[0020]

[0021] Among them, T1 is the next recharge time when the power is turned off for the first time; C0 is the capacity of the low-voltage battery; C1 is the power consumption of the low-voltage system when the power goes from working state to dormant state when the power is turned off for the first time; C2 is the static power consumption of the whole vehicle when the vehicle is in dormant state; C3 is the self-discharge of the low-voltage battery when the vehicle is stationary; P1 is the termination threshold of low-voltage battery power generation; P2 is the recharge threshold at which a generator is required to recharge the low-voltage battery.

[0022] Furthermore, before calculating the next power-on time, first determine whether it is the first power-off. If not, calculate the power-on time using the following formula:

[0023]

[0024] Among them, T2 is the next recharging time when it is not the first power-off; C0 is the capacity of the low-voltage battery; C2 is the static power consumption of the whole vehicle when the vehicle is in dormant state; C3 is the self-discharge of the low-voltage battery when the vehicle is stationary; P1 is the termination threshold of low-voltage battery power generation; P2 is the recharging threshold at which a generator is required to recharge the low-voltage battery.

[0025] Furthermore, when the vehicle is dormant, if the dormant time has not reached the next charging time and it is detected that the user is operating the vehicle, the charging process is exited.

[0026] Furthermore, after waking up the vehicle, when it is detected that the fuel level in the fuel tank is greater than or equal to the lower limit of the remaining fuel level, a prompt is given to start the engine to generate electricity. If the engine start is confirmed within the set time, the engine is started, and the generator works to replenish the battery until the charging termination threshold is reached. The engine is then stopped, the remaining fuel level in the fuel tank is obtained again, and the number of replenishment times is calculated. If the engine start is not confirmed within the set time or it is confirmed that the engine will not be started, the battery will not be replenished, the remaining fuel level in the fuel tank is directly obtained, and the number of replenishment times is calculated.

[0027] Furthermore, after waking up the vehicle, when it is detected that the fuel level in the fuel tank is less than the lower limit of the remaining fuel level, it is prompted that the fuel level is insufficient and the charging process is exited.

[0028] Furthermore, the following steps are included:

[0029] Step 1: When the vehicle is powered off, determine whether it is the first time to power off. If so, go to step 2; if not, go to step 3;

[0030] Step 2, obtaining the remaining fuel in the fuel tank, and determining the number of recharging times available for the battery to be charged according to the remaining fuel in the fuel tank; if the number of recharging times is greater than the set value, calculating the next recharging time, and executing step 3; if the number of recharging times is less than or equal to the set value, executing step 5;

[0031] Step 3: The vehicle is in sleep mode, and the sleep time is detected. When the sleep time reaches the next charging time, the vehicle is woken up and prompted to start the engine to generate electricity;

[0032] Step 4: confirm that the engine is started, the generator is working, and the battery is charged until the power generation termination threshold is reached, then the engine is stopped and the process returns to step 2;

[0033] Step 5, prompting that the oil level is insufficient.

[0034] The beneficial effects of the present invention are:

[0035] The present invention calculates the number of times the engine can be started for recharging and the next recharging interval time based on the amount of fuel when the vehicle is powered off and the vehicle's power consumption, plans a recharging plan based on the number of times and the interval time, and wakes up the vehicle and recharges the power according to the recharging plan; reduces the number of wake-ups as much as possible, reduces unnecessary power consumption and waste, and saves resources; at the same time, it also avoids the problem of running out of fuel due to recharging the battery and causing a breakdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a control flow chart of the present invention. DETAILED DESCRIPTION

[0037] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] The present invention provides a method for controlling the anti-power-feeding of automobile batteries. When the vehicle is powered off, the remaining fuel amount in the fuel tank is obtained, and the number of power-replenishing times available for charging the battery is determined according to the remaining fuel amount in the fuel tank; if the number of power-replenishing times is greater than or equal to a set value, the next power-replenishing time is calculated, and the vehicle is dormant. When the dormant time of the vehicle reaches the next power-replenishing time, the vehicle is awakened, and the battery is recharged after the engine is started; if the number of power-replenishing times is less than the set value, it is prompted that the fuel amount is insufficient, and the power-replenishing process is exited.

[0039] The present invention calculates the number of times the engine can be started for recharging and the next recharging interval time based on the amount of fuel when the vehicle is powered off and the vehicle's power consumption, plans a recharging plan based on the number of times and the interval time, and wakes up the vehicle and recharges the power according to the recharging plan; reduces the number of wake-ups as much as possible, reduces unnecessary power consumption and waste, and saves resources; at the same time, it also avoids the problem of running out of fuel due to recharging the battery and causing a breakdown.

[0040] like Figure 1 As shown, the battery anti-feedback control method of the present invention specifically includes the following steps:

[0041] Step 1: When the vehicle is powered off, determine whether it is the first power-off. If so, proceed to step 2; if not, proceed to step 4. The first power-off refers to the manual power-off by the user after the vehicle is used; non-first power-off refers to the first power-off of the vehicle / after manual power-off, the vehicle goes into sleep, wakes up after a period of time, and then goes into sleep again, that is, automatic power-off without human operation.

[0042] Step 2, obtain the remaining fuel amount in the fuel tank, and determine the number of recharges available for charging the battery based on the remaining fuel amount in the fuel tank; if the number of recharges is greater than the set value, execute step 3; if the number of recharges is less than or equal to the set value, execute step 7; the set value can be 1 or 2 times.

[0043] Step 3, determine whether it is the first power-off. If so, calculate the next power-on time T1 after the first power-off and execute step 4; if not, calculate the next power-on time T2 after hibernation; execute step 4; the next power-on time is the time interval from the start of vehicle hibernation to the next time the vehicle wakes up and prepares for power-on.

[0044] Step 4, the vehicle is in hibernation, and the hibernation time is detected (i.e., the countdown to the wake-up time starts). If the user does not operate the vehicle during the hibernation process and the hibernation time reaches the next power replenishment time (i.e., the wake-up time is up), the vehicle is woken up, and when the fuel level is sufficient, the engine is prompted to start to generate electricity, and step 5 or step 6 is executed; if the user is detected to operate the vehicle during the hibernation process, the power replenishment process is exited. The user operating the vehicle refers to unlocking the vehicle through the key or manual central control, opening the door, powering on the vehicle / operating the start switch, etc. The hibernation refers to all controllers (the power consumption of controllers that are normally powered is reduced to the minimum, and the power of controllers that are not normally powered will be directly cut off) entering the lowest power consumption mode.

[0045] Step 5: The user confirms to start the engine within the set time, the generator works, and the battery is charged until the power generation termination threshold P1 is reached, then the engine is stopped and the process returns to step 2.

[0046] Step 6: If the user does not confirm starting the engine within the set time T3 (or exceeds the set time) or confirms not to start the engine, the battery will not be recharged and the process returns to step 2.

[0047] Step 7, the system will prompt that the fuel level is insufficient and exit the charging process.

[0048] In step 2 above, the number of recharging times is calculated using the following formula:

[0049]

[0050] Among them, N is the number of replenishment times; E0 is the amount of electricity that can be converted into electricity when the fuel tank is full, in KWh; E1 is the amount of electricity consumed by starting the engine, in KWh; E2 is the amount of electricity consumed by low-voltage accessories when the vehicle is awake, in KWh; E3 is the amount of electricity charged by the generator to the low-voltage battery, in KWh; F1 is the starting threshold for power generation of the fuel in the tank, that is, the starting threshold for engine start power generation that can be converted to the remaining fuel in the tank after the vehicle is powered off or awakened from sleep, in %, and F2 is the termination threshold for charging the fuel in the tank, that is, the minimum remaining fuel threshold for power generation in the tank. When it is lower than this value, it means that the fuel is insufficient, in %. Setting F2 is to avoid exhausting the fuel due to replenishing the battery, so that the vehicle will break down due to lack of fuel when the driver starts the vehicle next time.

[0051] The power E2 consumed by the above low-voltage accessories is determined by the following formula:

[0052]

[0053] Among them, U is the low-voltage battery voltage; I1 is the current consumption of the low-voltage accessories; T0 is the single power generation time of the generator to the low-voltage battery, that is, the time taken by the generator to charge the battery from P2 to P1, which is a fixed value.

[0054] The amount of electricity E3 charged by the above generator to the low-voltage battery is determined by the following formula:

[0055]

[0056] Among them, U is the low-voltage battery voltage; I2 is the charging current of the generator to the low-voltage battery, and T0 is the single power generation time of the generator to the low-voltage battery.

[0057] In step 3 above, the next recharging time T1 when the vehicle is powered off for the first time is determined by the following formula:

[0058]

[0059] Among them, T1 is the next recharge time when the power is turned off for the first time; C0 is the capacity of the low-voltage battery (Ah); C1 is the power consumption of the low-voltage system from the working state to the dormant state when the vehicle is stationary and the power is turned off for the first time; C2 is the static power consumption of the whole vehicle when the vehicle is in the dormant state; C3 is the self-discharge of the low-voltage battery when the vehicle is stationary; the stationary state until the vehicle is stationary includes states such as waking up the vehicle and sleeping; P1 is the low-voltage battery power generation termination threshold, that is, the battery power threshold (%) reached after the vehicle has been driven for a cycle or the engine has generated power for the low-voltage battery through the generator; P2 is the recharge threshold (%) for the generator to recharge the low-voltage battery. When the battery is lower than this value, it means that the battery needs to be recharged. In theory, when the battery voltage is higher than P1, the engine will not start for recharging. However, when the vehicle is in hibernation, due to the static electricity consumption of the battery and the consumption of the normally powered controller, even if the battery power reaches P1 when the power is turned off or charged, the power will be consumed to below P1 after the hibernation charging time, and it is necessary to start the engine to generate electricity for the battery. Therefore, the present invention does not consider the charging operation when the battery power is higher than P1.

[0060] In the above step 3, the next power replenishment time T2 when the vehicle is not powered off for the first time (after hibernation) is determined by the following formula:

[0061] Among them, T2 is the next recharging time when it is not the first power-off; C0 is the capacity of the low-voltage battery; C2 is the static power consumption of the whole vehicle when the vehicle is in dormant state; C3 is the self-discharge of the low-voltage battery when the vehicle is stationary; P1 is the termination threshold of low-voltage battery power generation; P2 is the recharging threshold at which a generator is required to recharge the low-voltage battery.

[0062] Under normal circumstances, since the number of supplementary charges calculated after the last power-off is greater than or equal to the set value, it means that the fuel level is sufficient (that is, the fuel level is higher than F2 (minimum fuel level)). At this time, the fuel level should also be sufficient after waking up. In order to avoid abnormal power consumption caused by failure or other situations when the vehicle is dormant, resulting in the fuel level being lower than the termination charging threshold. Therefore, in the above step 4, after waking up the vehicle, the fuel level in the tank needs to be checked again. When the remaining fuel level is lower than the termination charging threshold, it prompts that the fuel level is insufficient and the supplementary charge process is exited; when it is higher than the termination charging threshold, it prompts to start the engine to generate electricity.

[0063] In the above steps 4 to 6, prompt information and information confirmation can be prompted and confirmed through communication between the mobile phone and the vehicle computer.

[0064] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field.

Claims

1. A method for preventing power feeding of automobile batteries, characterized in that: When the vehicle is powered off, the remaining fuel amount in the fuel tank is obtained, and the number of times the battery can be charged is determined based on the remaining fuel amount in the fuel tank; If the number of charging times is greater than the set value, the next charging time is calculated, the vehicle is dormant, and when the dormant time reaches the next charging time, the vehicle is awakened, and the engine is started to charge the battery; If the number of charging times is less than or equal to the set value, it will prompt that the fuel level is insufficient and exit the charging process; The number of recharging times is calculated using the following formula: Among them, N is the number of recharges; E0 is the amount of electricity that can be converted into electricity when the fuel tank is full; E1 is the amount of electricity consumed when starting the engine; E2 is the amount of electricity consumed by low-voltage accessories; E3 is the amount of electricity charged by the generator to the low-voltage battery; F1 is the threshold for starting power generation of the fuel in the tank; F2 is the threshold for stopping charging of the fuel in the tank.

2. The method for preventing power feed of an automobile battery according to claim 1, characterized in that: The amount of electricity E2 consumed by the low-voltage accessory is determined by the following formula: Among them, U is the low-voltage battery voltage; I1 is the current consumed by the low-voltage accessories, and T is the single power generation time of the generator to the low-voltage battery.

3. The method for preventing power feed of an automobile battery according to claim 1, characterized in that: The amount of electricity E3 charged by the generator to the low-voltage battery is determined by the following formula: Among them, U is the low-voltage battery voltage; I2 is the charging current of the generator to the low-voltage battery, and T is the single power generation time of the generator to the low-voltage battery.

4. The method for preventing power feed of an automobile battery according to claim 1, characterized in that: Before calculating the next power-on time, first determine whether it is the first power-off. If so, calculate the power-on time using the following formula: Among them, T1 is the next recharge time when the power is turned off for the first time; C0 is the capacity of the low-voltage battery; C1 is the power consumption of the low-voltage system when the power goes from working state to sleep state when the power is turned off for the first time; C2 is the static power consumption of the whole vehicle when the vehicle is in sleep state; C3 is the self-discharge of the low-voltage battery when the vehicle is stationary; P1 is the power generation termination threshold; P2 is the recharge threshold at which the generator is required to recharge the low-voltage battery.

5. The method for preventing power feed of automobile battery according to claim 1, characterized in that: Before calculating the next power-on time, first determine whether it is the first power-off. If not, calculate the power-on time using the following formula: Among them, T2 is the next recharging time when it is not the first time to power off; C0 is the capacity of the low-voltage battery; C2 is the static power consumption of the whole vehicle when the vehicle is in dormant state; C3 is the self-discharge of the low-voltage battery when the vehicle is stationary; P1 is the power generation termination threshold; P2 is the recharging threshold at which the generator is required to recharge the low-voltage battery.

6. The method for preventing power feed of an automobile battery according to claim 1, characterized in that: When the vehicle is in sleep mode, if the sleep time has not reached the next charging time and the user is detected operating the vehicle, the charging process will be exited.

7. The method for preventing power feed of automobile battery according to claim 1, characterized in that: After waking up the vehicle, when it is detected that the fuel level in the tank is greater than or equal to the lower limit of the remaining fuel level, a prompt is given to start the engine to generate electricity. If the engine start is confirmed within the set time, the engine starts, and the generator works to replenish the battery until the charging termination threshold is reached. The engine is then stopped, the remaining fuel level in the tank is obtained again, and the number of replenishment times is calculated. If the engine start is not confirmed within the set time or it is confirmed that the engine will not be started, the battery will not be replenished, the remaining fuel level in the tank is directly obtained, and the number of replenishment times is calculated.

8. The method for preventing power feed of automobile battery according to claim 1, characterized in that: After waking up the vehicle, when the fuel level in the tank is detected to be less than the lower limit of the remaining fuel level, it will prompt that the fuel level is insufficient and exit the charging process.

9. The method for preventing power feed of automobile battery according to claim 1, characterized in that: The following steps are involved: Step 1: When the vehicle is powered off, determine whether it is the first time to power off. If so, go to step 2; if not, go to step 3; Step 2, obtaining the remaining fuel in the fuel tank, and determining the number of recharging times available for the battery to be charged according to the remaining fuel in the fuel tank; if the number of recharging times is greater than the set value, calculating the next recharging time, and executing step 3; if the number of recharging times is less than or equal to the set value, executing step 5; Step 3: The vehicle is in sleep mode, and the sleep time is detected. When the sleep time reaches the next charging time, the vehicle is woken up and prompted to start the engine to generate electricity; Step 4: confirm that the engine is started, the generator is working, and the battery is charged until the power generation termination threshold is reached, then the engine is stopped and the process returns to step 2; Step 5, prompting that the oil level is insufficient.

Images