A method and device for protecting a low-voltage storage battery of an automobile

Abstract

The application discloses a kind of automobile low-voltage battery power shortage protection control methods, comprising the following steps: S1) engine is turned off, judge whether ignition signal is powered off, if not, obtain the charge amount state and available charge amount of battery and execute energy classification shutdown step until the ignition signal is powered off;S2) ignition signal is powered off but bus is not dormant, obtain charge amount state, available charge amount and battery state, battery state is judged according to battery state judging step;S3) after bus is dormant, execute static current value monitoring program, static current value monitoring program is used to control the opening and closing of battery power supply switch according to battery static current value, the duration of static current value and charge amount state.The application also discloses a kind of automobile low-voltage battery power shortage protection device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of automobile, and particularly relates to the field of automobile low-voltage storage battery protection. BACKGROUND

[0002] During the use of the vehicle, the user may encounter the situation that the vehicle cannot be started due to the low-voltage storage battery running out of power. Scenario one: such as in the case of long-time parking, the normal state static current continuously consumes the power, the driving recorder is directly installed on the positive and negative poles of the storage battery, the vehicle is locked and the storage battery power and the bus are continuously consumed after being woken up by accident, etc., which will cause the static current consumption to cause the low-voltage storage battery to run out of power. Scenario two: such as the poor state of the storage battery, which makes the storage battery prone to running out of power, resulting in the vehicle being unable to start. Scenario three: after the engine is turned off, the vehicle is not powered off, and the low-voltage storage battery is continuously consumed by the vehicle electrical appliances, resulting in the storage battery running out of power.

[0003] Chinese patent CN107878212A provides a kind of automobile storage battery protection method and system to prevent running out of power, wherein the method comprises the following steps: S01, it is judged whether the current state of vehicle is closed lock hibernation state, if the current state of vehicle is closed lock hibernation state, then enter step S02;S02, it is judged whether the current storage battery group is in the state of running out of power, if the current storage battery group is in the state of running out of power, then enter step S03;S03, it is judged whether the current gear position of vehicle is in P or N, if the current gear position of vehicle is in P or N, then enter step S04;S04, it is judged whether the current engine fuel quantity is greater than or equal to the preset value, if the current engine fuel quantity is greater than or equal to the preset value, then enter step S05;S05, start engine to charge the storage battery group.

[0004] Although the method can automatically start the engine without key, making the vehicle more intelligent, and avoiding the problem of storage battery running out of power caused by long-time static storage of the vehicle, the method is realized by starting the engine to charge the storage battery, and cannot control the storage battery power supply switch according to the battery state to achieve the purpose of blocking the consumption of the storage battery power by the vehicle electrical equipment. SUMMARY

[0005] The present application provides a kind of automobile low-voltage storage battery protection control method and device, which solves the problem that the storage battery power supply switch cannot be controlled according to the battery state in the prior art to achieve the purpose of blocking the consumption of the storage battery power by the vehicle electrical equipment.

[0006] The present application provides a kind of automobile low-voltage storage battery protection control method, comprising the following steps:

[0007] S1) engine off, determine if the ignition signal is powered down, if not, get the state of charge and available charge of the battery and perform energy hierarchical shutdown step to gradually turn off the power consumption devices on the vehicle according to the state of charge and the available charge, if the ignition signal is powered down, perform the next step;

[0008] S2) the ignition signal is powered down but the bus is not in sleep, get the state of charge, the available charge and the battery state, the battery state is determined according to the battery state determination step, if the state of charge, the available charge and the battery state meet the first battery power switch shutdown condition, perform the battery power switch shutdown, and perform the next step after the bus is in sleep;

[0009] S3) after the bus is in sleep, perform the static current value monitoring program, the static current value monitoring program is used to control the opening and closing of the battery power switch according to the battery static current value, the duration of the static current value and the state of charge.

[0010] According to an embodiment of the present application, the energy hierarchical shutdown step further comprises:

[0011] S11) get the current state of charge and available charge, if the state of charge is less than the first state of charge or the available charge is less than the first available charge, perform the first energy shutdown program and perform the next step, otherwise, re-execute S11, the first state of charge and the first available charge include the power consumption of the additional function, and the first energy shutdown program includes turning off the additional function;

[0012] S12) get the current state of charge and available charge, if the state of charge is less than the second state of charge or the available charge is less than the second available charge, perform the second energy shutdown program and perform the next step, otherwise, re-execute S12, the second state of charge and the second available charge include the power consumption of the basic function, and the second energy shutdown program includes turning off the basic function and prompting; S13) get the current state of charge and available charge, if the state of charge is less than the third state of charge or the available charge is less than the third available charge, perform the third energy shutdown program and perform the next step, otherwise, re-execute S13, the third state of charge and the third available charge include the power consumption when the battery power is low, and the energy shutdown program includes powering down the ignition signal.

[0013] According to an embodiment of the present application, the first battery power switch shutdown condition further comprises:

[0014] S21) if the charge amount state is less than a fourth charge amount state or the available charge amount is less than a fourth available charge amount, performing a battery power supply switch shutdown, otherwise performing the next step, the fourth available charge amount state and the fourth available charge amount including the battery power amount for the next start-up of the battery;

[0015] S22) if the battery state is determined to be poor or the available charge amount is less than the fourth available charge amount according to the battery state determination step, performing the battery power supply switch shutdown.

[0016] According to an embodiment of the present application, the static current value monitoring procedure further comprises:

[0017] When the vehicle has a mild power consumption anomaly, a first power loss protection procedure is started, the mild power consumption anomaly including the static current value being greater than a first static current and less than or equal to a second static current, the first power loss protection procedure including resetting the battery, logically determining the static current, and shutting down the battery power supply switch;

[0018] When the vehicle has a severe power consumption anomaly, a second power loss protection procedure is started, the severe power consumption anomaly including the static current value being greater than the second static current, the second power loss protection procedure including shutting down the battery power supply switch;

[0019] When the vehicle is in a normal parking state, a third power loss protection procedure is started, the normal parking state including the static current value being less than the first static current, the third power loss protection procedure including a reminder of long-term parking of the vehicle and shutting down the battery power supply switch.

[0020] According to an embodiment of the present application, the battery state determination step further comprises:

[0021] obtaining a first battery charge amount sampling point and a second battery charge amount sampling point, the first battery charge amount sampling point and the second battery charge amount sampling point being separated by a certain sampling time;

[0022] calculating a charge amount slope value according to the first battery charge amount sampling point and the second battery charge amount sampling point;

[0023] determining the battery state according to the charge amount slope value.

[0024] According to an embodiment of the present application, the expression for calculating the charge amount slope value is:

[0025] K = η1*η2(SOC t2 -SOC t1 ) / △T

[0026] wherein η1 represents a correction value corresponding to different discharge currents;

[0027] η2 represents a correction value corresponding to different battery temperatures;

[0028] SOC t1 is the first battery charge amount sampling point;

[0029] SOC t2 is the second battery charge amount sampling point.

[0030] According to an embodiment of the present application, the third power loss protection procedure further comprises:

[0031] reminding a user to charge the battery when the duration of the static current value is equal to the third duration or the charge state is equal to the first charge state.

[0032] The embodiment of the present application provides a low-voltage battery power loss protection device for an automobile, comprising:

[0033] a battery data management module, which is used to monitor the state of the battery, and the state comprises the voltage, the current, the temperature of the battery, the charge state of the battery and the available charge amount;

[0034] a battery power supply switch;

[0035] a body controller, which is used to turn off an ignition signal;

[0036] a low-voltage energy management module, which is used to receive the state of the battery and then execute the low-voltage battery power loss protection control method for the automobile as described above.

[0037] According to an embodiment of the present application, the low-voltage energy management module is integrated with a gateway controller, and the gateway controller is used to remotely transmit and receive signals.

[0038] According to an embodiment of the present application, the battery power supply switch is a smart battery power supply switch, which is used to remotely receive signals to control the switch.

[0039] The one or more technical solutions provided by the embodiment of the present application have at least the following technical effects or advantages:

[0040] 1. Since the energy grading judgment step and the static current value monitoring procedure are adopted, the purpose of gradually reducing the consumption of the battery is achieved.

[0041] 2. Since the low-voltage energy management module is arranged, the logical judgment and management of the switch of the battery can be performed. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1The preferred low-voltage battery power loss protection control method of the embodiment;

[0043] Figure 2 The preferred low-voltage battery power loss protection control method of the embodiment is a logic control flow chart.

[0044] Figure 3 The preferred low-voltage battery power loss protection control method of the embodiment is a control block diagram.

[0045] Figure 4 The preferred low-voltage battery power loss protection control method of the embodiment is a control block diagram.

[0046] Figure 5 The preferred low-voltage battery power loss protection control method of the embodiment is a control block diagram.

[0047] Figure 6 The preferred low-voltage battery power loss protection control method of the embodiment is a control block diagram. DETAILED DESCRIPTION

[0048] The technical solutions of the embodiments of the application will be described in detail below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the embodiments of the application.

[0049] When the user parks and manually turns off the engine, but the ignition signal is not powered off, the user may be waiting for someone or need to rest and stay in the car, and then the headlights, radio and other electrical appliances remain on, and the vehicle is in a large current consumption state of the battery. According to the total discharge time of the full charge of the low-voltage battery at a certain generating current, when the headlights and radio and other electrical appliances are turned on, the corresponding current is about 22A. If the user continues to maintain this state, after 1-2h, the SOC (state-of-charge, SOC of the vehicle battery) will be reduced to a low value, such as about 20%. If no measures are taken, the low-voltage battery will be depleted, and the vehicle cannot be restarted, so the state needs to be controlled.

[0050] Figure 1 The preferred low-voltage battery power loss protection control method of the embodiment is shown in FIG. 1, which includes the following steps: Figure 1

[0051] ​S1) engine off, determine whether the ignition signal is powered off, if not, get the charge state and available charge of the battery and perform energy hierarchical shutdown step until the ignition signal is powered off, the energy hierarchical shutdown step is used to gradually turn off the power consumption devices on the vehicle according to the charge state and available charge of the battery, if the ignition signal is powered off, the next step is performed;

[0052] S2) when the ignition signal is powered off but the bus is not in sleep, get the charge state, available charge and battery state, the battery state is determined according to the battery state determination step, if the charge state, available charge and battery state meet the first battery power supply switch-off condition, perform the battery power supply switch-off, and after the bus is in sleep, the next step is performed;

[0053] S3) after the bus is in sleep, perform the static current value monitoring program, the static current value monitoring program is used to control the opening and closing of the battery power supply switch according to the battery static current value, the duration of the static current value and the charge state.

[0054] Figure 2 The preferred low-voltage battery power protection control method of the present embodiment is a logic control flowchart. The specific steps of the automobile low-voltage battery power protection control method of the present application will be further described below in combination with Figure 1 and Figure 2 The specific steps of the automobile low-voltage battery power protection control method of the present application will be further described below in combination with

[0055] S1) engine off, determine whether the ignition signal is powered off, if not, get the charge state and available charge of the battery and perform energy hierarchical shutdown step until the ignition signal is powered off, the energy hierarchical shutdown step is used to gradually turn off the power consumption devices on the vehicle according to the charge state and available charge of the battery, if the ignition signal is powered off, the next step is performed;

[0056] In this step, the energy hierarchical shutdown step further includes:

[0057] S11) get the current charge state and available charge, if the charge state is less than the first charge state or the available charge is less than the first available charge, perform the first energy shutdown program and perform the next step, otherwise, re-perform S11, the first charge state and the first available charge include the power consumption of the additional function, and the first energy shutdown program includes turning off the additional function;

[0058] S12) Obtain the current charge status and available charge. If the charge status is less than the second charge status or the available charge is less than the second available charge, execute the second energy shutdown procedure and proceed to the next step; otherwise, re-execute S12. The second charge status and second available charge include the power consumption for removing basic functions. The second energy shutdown procedure includes disabling basic functions and issuing a reminder. S13) Obtain the current charge status and available charge. If the charge status is less than the third charge status or the available charge is less than the third available charge, execute the third energy shutdown procedure and proceed to the next step; otherwise, re-execute S13. The third available charge status and third available charge include the charge level when the battery charge is low. The energy shutdown procedure includes: powering off the ignition signal.

[0059] In this step, with the engine off and KL.15 (ignition signal) powered on, the energy management tiered shutdown operation is executed by determining the battery's State of Charge (SOC) or available battery charge (Qe). The battery's State of Charge calculation expression is as follows:

[0060] Q = Q0 + Qe;

[0061] Where Q is the charge of the battery, Q0 is the starting charge required to start the vehicle, and Qe is the available charge excluding the starting charge.

[0062] When the State of Charge (SOC) and Qe of the battery drop to a certain threshold, it triggers Energy Shutdown Level 1, shutting down certain functions. If it continues to drop to a lower threshold, it triggers Energy Shutdown Level 2, shutting down more electrical functions. Then, if SOC and Qe continue to decrease, it triggers Energy Shutdown Level 3, directly shutting down KL.15.

[0063] Preferably, the first charge amount state SOC in this step is set to 40%, the first available charge amount Qe is set to 10 Ah; the second charge amount state SOC is set to 35%, the second available charge amount Qe is set to 10 Ah; the third charge amount state SOC is set to 30%, the third available charge amount Qe is set to 3 Ah; when SOC < 40% or Qe < 10 Ah, the energy shutdown level 1 is triggered, such as controlling the vehicle electrical appliances to have no function about the off-home function. When SOC < 35% or Qe < 7 Ah, the energy shutdown level 2 is triggered, such as controlling the vehicle electrical appliances to be turned off about the indoor and outdoor environment light, reading light, foot light, controller, air conditioner blower, seat ventilation light device, and the sunroof cannot be opened. At the same time, the instrument and navigation give a warning, and the embodiment preferably triggers the warning: the 12V storage battery is about to be depleted, please turn off the ignition switch immediately, or start the engine, then the entertainment system is automatically turned off. When SOC < 30% or Qe < 3 Ah, the energy shutdown level 3 is triggered, and KL.15 (ignition signal) is directly executed to automatically power off, and the instrument is black screen.

[0064] S2) When the ignition signal is powered off but the bus is not in sleep, the charge amount state, the available charge amount and the storage battery state are obtained, the storage battery state is judged according to the storage battery state judgment step, if the charge amount state, the available charge amount and the storage battery state reach the first storage battery power supply switch-off condition, the storage battery power supply switch-off is executed, and the next step is executed after the bus is in sleep;

[0065] In this step, the common methods for the storage battery state judgment step include internal resistance, health state of the storage battery, energy flux of the storage battery and the like.

[0066] The embodiment of the application proposes a new method for judging the storage battery state. According to the characteristic curve of a certain vehicle storage battery, the slope of the SOC decrease under different discharge currents is defined, and the temperature is corrected, because the corresponding SOC decrease slope is not the same under different discharge currents and storage battery temperatures. This point is the same as the user's mobile phone battery. When the mobile phone battery state is poor, the more functions are turned on, the lower the temperature is, and the faster the mobile phone charge amount state value decreases. When the slope value is too large and greater than a certain threshold, it means that the state of the storage battery is worse.

[0067] Preferably, the storage battery state judgment step further comprises:

[0068] The first storage battery charge amount sampling point and the second storage battery charge amount sampling point are obtained, and the first storage battery charge amount sampling point and the second storage battery charge amount sampling point are separated by a certain sampling time;

[0069] The charge amount slope value is calculated according to the first storage battery charge amount sampling point and the second storage battery charge amount sampling point.

[0070] determining the state of the battery according to the charge amount slope value.

[0071] wherein the calculation of the charge amount slope value calculation expression is:

[0072] K = η1*η2(SOC t2 -SOC t1 ) / △T

[0073] wherein η1 represents a correction value corresponding to different discharge currents;

[0074] η2 represents a correction value corresponding to different battery temperatures;

[0075] SOC t1 is the first battery charge amount sampling point;

[0076] SOC t2 is the second battery charge amount sampling point.

[0077] In this step, the first battery power supply switch-off condition further comprises:

[0078] S21) if the charge amount state is less than a fourth charge amount state or the available charge amount is less than a fourth available charge amount, performing battery power supply switch-off, otherwise performing the next step, the fourth available charge amount state and the fourth available charge amount including the amount of power for the next start of the battery;

[0079] S22) if it is determined according to the battery state determination step that the state of the battery is poor or the available charge amount is less than the fourth available charge amount, performing the battery power supply switch-off.

[0080] Preferably, the fourth charge amount state SOC is set to 25%, and the fourth available charge amount Qe is set to 2 Ah. When KL.15 is detected after power-off, the charge amount state SOC and the available charge amount of the battery can be read at this time when the gateway and the related bus are not immediately hibernated, and when SOC < 25% or Qe < 2 Ah, the battery power supply switch-off is directly performed, ensuring that the low-voltage battery has enough power to meet the next start.

[0081] S3) After the bus hibernation, a static current value monitoring program is executed, which is used to control the opening and closing of the battery power supply switch according to the battery static current value, the duration of the static current value and the charge amount state.

[0082] Preferably, the static current value monitoring program further comprises:

[0083] When the vehicle has a mild power consumption anomaly, a first power loss protection procedure is started, the mild power consumption anomaly including the static current value being greater than a first static current and less than or equal to a second static current, the first power loss protection procedure including a reset of the storage battery, a logical judgment of the static current, and turning off the storage battery power supply switch;

[0084] When the vehicle has a severe power consumption anomaly, a second power loss protection procedure is started, the severe power consumption anomaly including the static current value being greater than the second static current, the second power loss protection procedure including turning off the storage battery power supply switch;

[0085] When the vehicle is in a normal parking state, a third power loss protection procedure is started, the normal parking state including the static current value being less than the first static current, the third power loss protection procedure including a reminder of long-term parking of the vehicle and turning off the storage battery power supply switch.

[0086] The first power loss protection procedure includes:

[0087] a reset of the storage battery, a one-time opening and closing operation of the storage battery power supply switch being performed;

[0088] After the opening and closing step, it is determined again whether the static current value is greater than the first static current and less than or equal to the second static current, if yes, a next step of determining whether the duration of the static current value is greater than a first duration or the state of charge is less than a third state of charge is performed, if yes, the storage battery power supply switch is turned off, otherwise, the static current value monitoring procedure is re-executed;

[0089] The second power loss protection procedure includes:

[0090] determining whether the duration of the static current value is greater than a second duration or the state of charge is less than a third state of charge, if yes, the storage battery power supply switch is turned off, otherwise, the static current value monitoring procedure is re-executed;

[0091] The third power loss protection procedure includes:

[0092] determining whether the duration of the static current value is equal to a third duration or the state of charge is equal to a first state of charge, if yes, the static current value monitoring procedure is re-executed, otherwise, a next step of determining whether the duration of the static current value is greater than a fourth duration or the state of charge is less than a fourth state of charge is performed, if yes, the storage battery power supply switch is turned off, otherwise, the static current value monitoring procedure is re-executed.

[0093] The third power loss protection procedure further includes:

[0094] The user is reminded to charge the battery when the duration of the static current value is equal to the third duration or the charge amount state is equal to the first charge amount state.

[0095] In this step, the static current value monitoring program determines the size of the static current value in three cases:

[0096] If the static current value is large, such as when the vehicle has a mild power consumption anomaly. In this embodiment, the static current value is preferably greater than the first static current and less than or equal to the second static current. The opening and closing of the battery power supply switch is performed, and the purpose of this operation is to prevent occasional communication failures caused by the controller chip, which results in a large static current. After the controller chip is reset by power-on and power-off, the possible failure may disappear, and the static current returns to a normal value. If it does not return to a normal value, it is determined whether the duration of the static current value exceeds the threshold or the SOC is lower than the threshold, and if so, the battery power supply switch is turned off.

[0097] If the static current value is very large, such as when the vehicle has a severe power consumption anomaly. In this embodiment, the static current value is preferably greater than the second static current, and it is determined whether the duration of the static current value exceeds the threshold or the SOC is lower than the threshold, and if so, the battery power supply switch is turned off.

[0098] If the static current value is small, such as when the vehicle is in a normal parked state and no device has a power consumption anomaly. In this embodiment, when the static current value is less than or equal to the first static current, the battery power supply switch is turned off after the vehicle has been parked for a few days or the battery charge amount state decreases to a threshold, and the low-voltage battery no longer consumes power.

[0099] In this step, the first static current is set to 50 mA; the second static current is set to 20 A; the first duration of the static current is set to 1 day; the second duration is set to 0.5 days; the third duration is set to 20 days; the fourth duration is set to 30 days; the first charge amount state is set to 40%; the second charge amount state is set to 35%; the third charge amount state is set to 30%; and the fourth charge amount state is set to 25%. It is worth noting that these durations and charge amount states can be adjusted according to actual needs.

[0100] The following is the specific application process of the static current value monitoring program on the car:

[0101] After the KL.15 is powered off, the vehicle will enter a sleep mode usually after 30s-1 min, at which time the state of the battery is periodically detected. When a static current value I≤50mA is detected, a logical judgment of the state of the battery is performed. When the duration of the static current t=20 days or the state of the charge of the battery SOC=40%, a reminder is sent to the user's mobile phone through a T-Box (Telematics BOX remote information processing system), prompting that the 12V battery is low and needs to be started to charge. Then the judgment is continued, and when the duration of the static current value t>30 or SOC<25% is detected, the low-voltage energy management module issues an instruction to disconnect the battery power supply switch, and the battery power supply switch is disconnected.

[0102] When a static current value 50mA<I≤20A is detected, a logical judgment of the state of the battery is performed. The possible reasons for this situation are: the positive and negative poles of the battery are directly connected to a similar driving recorder; the vehicle bus is accidentally awakened by a controller failure; the key of the keyless entry system is continuously moved to awaken the bus; after the person leaves the car, the parking light is mistakenly turned on, etc., resulting in high static current and causing the battery to run out.

[0103] The battery power supply switch is reset, i.e., it is disconnected and then turned on. The main reason is that as the number of vehicle controllers increases, the chip is prone to occasional faults during cyclic detection. When the controller fails, it will cause the bus to wake up, causing the static current to be too high. However, this type of controller failure can automatically disappear after reset, similar to our phone crashing, where the function becomes normal after the phone is restarted. Therefore, by adding this reset step, unnecessary occasional faults that cause the static current to be too large are reduced. The logic of this reset is that the low-voltage energy management control battery power supply switch is integrated in the gateway and is disconnected, and at the same time, the low-voltage energy management sends an instruction to the T-Box to close the battery power supply switch after a delay of 30s, and the T-Box controls the closing of the battery power supply switch, because the battery power supply switch is disconnected, the gateway also stops working, and the T-Box is directly powered by the positive and negative poles of the battery and can continue to work.

[0104] After the battery power supply switch is reset, it is determined whether the static current value is still 50mA<I≤20A. If so, a logical judgment of the state of the battery is performed. The specific judgment logic is that when the parking time t>1 day or SOC<30%, KL.30 is automatically executed to disconnect to prevent the static current from being too large and causing the battery to run out.

[0105] When the static current value is too large, I>20A, such as when the bus wakes up, multiple controller failures, high beam always on (when the high beam signal controller fails, the regulations require it to be always on), etc., the static current value is logically judged at this time, and if the duration t>0.5h or SOC<30% is executed, the KL.30 is automatically turned off.

[0106] Figure 3 The control block diagram of the preferred low-voltage battery depletion protection method of the present embodiment is shown in Figure 3 The present embodiment also provides a low-voltage battery depletion protection device for an automobile, which comprises:

[0107] A battery data management module 20 is used to monitor the state of the battery, including the voltage, current, temperature, charge state, and available charge of the battery.

[0108] A battery power supply switch 30;

[0109] A body controller 40 is used to turn off the ignition signal 41.

[0110] A low-voltage energy management module 50 is used to receive the state of the battery and execute the above-mentioned low-voltage battery depletion protection control method for an automobile.

[0111] The battery data management module 20 is connected to the negative terminal of the battery, and the battery data management module 200 can detect the voltage, current, and temperature values of the battery. These detection values are sent to the gateway through the LIN (Local Interconnect Network serial network) bus. Preferably, the battery data management module 200 wakes up itself every 6s after the bus is in sleep mode, detects the static current value, and if the static current is not too high, the LIN is woken up once every 24h, and if the static current is too high, the LIN is woken up in time to provide relevant logical judgment to the low-voltage energy management.

[0112] The low-voltage energy management module 50 receives the voltage, current, and temperature values from the battery data management module, performs relevant logical calculations to obtain the charge state value SOC and available charge Qe of the battery, etc. After logical judgment, it sends an instruction to the battery power supply switch 30 to turn off or not. The battery power supply switch 30 is used to automatically disconnect the circuit of the battery power supply switch 30 after receiving the instruction from the low-voltage energy management to turn off the battery power supply switch 30, and preferably, the battery power supply switch can also perform the closing operation on the circuit.

[0113] Preferably, the low-voltage energy management module 50 is integrated with a gateway controller 70 for remotely transmitting and receiving signals.

[0114] Preferably, the instrument panel 80 and the infotainment system 90 are connected to the low-voltage energy management module 50, and the instrument panel 80 and the infotainment system 90 can display alarm signals from the low-voltage energy management module 50.

[0115] Preferably, the battery power supply switch 30 can be an intelligent battery power supply switch 31, used to remotely receive signals and control the switch.

[0116] Figure 4 The wiring diagram for the preferred gateway controller and intelligent battery power supply switch in this embodiment is shown below. Figure 4 As shown, the intelligent battery power supply switch 31 is positioned in the middle of the connection line between the generator 100 and the positive terminal of the battery 10. The connection point between the vehicle's electrical grid and the generator and battery 10 is located between the intelligent battery power supply switch 31 and the generator 100. This prevents a sudden power outage of the vehicle's electrical grid caused by the failure of the intelligent battery power supply switch 31 during driving. Otherwise, if the intelligent battery power supply switch 31 fails to open, the vehicle's electrical grid will suddenly lose power, resulting in loss of power steering and engine stall, which would be extremely dangerous.

[0117] The control line controlled by the gateway controller 70 is connected to the control line of the intelligent battery power supply switch 31. Preferably, when the low-voltage energy management module 50 integrated in the gateway controller 70 needs to disconnect the intelligent battery power supply switch 31 after complex logic judgment, it is only necessary to control the control line of the intelligent battery power supply switch 31 through the control line of the gateway controller 70.

[0118] Figure 5 The preferred wiring diagram for this embodiment is shown between the remote information processing system T-Box and the intelligent battery power supply switch. (See diagram below.) Figure 5 As shown, the power supply of the remote information processing system 110 is directly connected to the positive and negative terminals of the battery. When the gateway controls the smart battery power supply switch to be turned off, the remote information processing system 110 can still be powered by the positive and negative terminals of the battery to maintain normal operation and can receive KL.30 on / off commands sent by the mobile application.

[0119] In use, if a user finds the vehicle unable to unlock when they need to use it, they can send a "KL.30 engage" command via the mobile application. Upon receiving the "KL.30 engage" command from the mobile application, the telematics system 110 engages the intelligent battery power switch, allowing the vehicle to unlock normally and preventing the vehicle from failing to start due to a low-voltage battery. It is important to note that sending a signal to the telematics system 110 via the mobile application is just one form of wireless control, and it is not limited to this method.

[0120] The mobile phone application end can control the active automatic disconnection function of the intelligent battery power supply switch 31. When the user knows that the vehicle will not be used for several days or a long time, the intelligent battery power supply switch can be turned off through the mobile phone application end to avoid unnecessary static current consumption and ensure that the low-voltage battery does not run out of power.

[0121] Figure 6 The figure shows the circuit connection of the preferred manual switch and the intelligent battery power supply switch of the present embodiment. As shown in the figure, the circuit of the intelligent battery power supply switch is additionally provided with a manual switch 120 to prevent the intelligent battery power supply switch 31 from being attracted by the mobile phone application. When in use, the vehicle door can be opened by a mechanical key, and then the engine compartment cover is opened. The intelligent switch is attracted by manual operation. The specific connection mode of the manual switch 120 is that one end is connected to the positive and negative poles of the battery 10, and the other end is connected to the intelligent battery power supply switch 31. Figure 6

[0122] Preferably, the manual switch 120 can be manually disconnected. For example, when the mobile phone application cannot automatically control the intelligent battery power supply switch 31 to disconnect, the disconnection function of the intelligent battery power supply switch can be executed by opening the engine compartment cover. This is suitable for the scenario where the user knows that the vehicle will not be used for several days or a long time, but cannot operate through the mobile phone application.

[0123] Those skilled in the art will appreciate that information, signals, and data can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0124] Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

[0125] ​The various illustrative logical blocks, circuits, and circuits described in connection with the embodiments disclosed herein can be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0126] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In the alternative, the processor and the storage medium can reside as discrete components in a user terminal.

[0127] In one or more exemplary embodiments, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0128] The above embodiments are provided to persons skilled in the art to implement or use the present application, and the persons skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive idea of the present application, and thus the scope of protection of the present application should not be limited by the above embodiments, but should be the maximum scope of protection meeting the innovative features mentioned in the claims.

Claims

1. A method for protecting a low-voltage storage battery of an automobile, comprising the following steps: S1) when the engine is off, determining whether an ignition signal is powered off, if not, obtaining a charge state of the storage battery and an available charge amount, and performing an energy hierarchical shutdown step until the ignition signal is powered off, the energy hierarchical shutdown step being used to gradually turn off power-consuming devices on the vehicle according to the charge state of the storage battery and the available charge amount, and if the ignition signal is powered off, performing the next step; S2) when the ignition signal is powered off but the bus is not in sleep mode, obtaining the charge state, the available charge amount, and a storage battery state, the storage battery state being determined according to a storage battery state determining step, if the charge state, the available charge amount, and the storage battery state meet a first storage battery power supply switch shutdown condition, performing a storage battery power supply switch shutdown, and after the bus is in sleep mode, performing the next step; S3) after the bus is in sleep mode, performing a static current value monitoring program, the static current value monitoring program being used to control opening and closing of the storage battery power supply switch according to a battery static current value, a duration of the static current value, and the charge state; wherein the static current value monitoring program further comprises: starting a first battery discharge protection program when the vehicle has a mild power consumption anomaly; starting a second battery discharge protection program when the vehicle has a severe power consumption anomaly; and starting a third battery discharge protection program when the vehicle is in a normal parking state; the first battery discharge protection program comprises: resetting the storage battery, and performing an opening and closing operation on the storage battery power supply switch; after the opening and closing operation, re-determining whether the static current value is greater than a first static current and less than or equal to a second static current, if yes, performing the next determination, if not, re-performing the static current value monitoring program, the next determination being determining whether a duration of the static current value is greater than a first duration or the charge state is less than a third charge state, if yes, disconnecting the storage battery power supply switch, if not, re-performing the static current value monitoring program; the second battery discharge protection program comprises: determining whether the duration of the static current value is greater than a second duration or the charge state is less than the third charge state, if yes, disconnecting the storage battery power supply switch, if not, re-performing the static current value monitoring program; and the third battery discharge protection program comprises: determining whether the duration of the static current value is equal to a third duration or the charge state is equal to a first charge state, if yes, re-performing the static current value monitoring program, if not, performing the next determination, the next determination step being determining whether the duration of the static current value is greater than a fourth duration or the charge state is less than a fourth charge state, if yes, disconnecting the storage battery power supply switch, if not, re-performing the static current value monitoring program; and the storage battery state determining step further comprises: obtaining a first storage battery charge sampling point and a second storage battery charge sampling point, the first storage battery charge sampling point and the second storage battery charge sampling point being separated by a certain sampling time. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ calculating a charge amount slope value according to the first battery charge amount sampling point and the second battery charge amount sampling point; judging a battery state according to the charge amount slope value; the calculation of the charge amount slope value is calculated by the following expression: K = η1*η2(SOC t2 -SOC t1 ) / △T wherein, η1 represents a correction value corresponding to different discharge currents; η2 represents a correction value corresponding to different battery temperatures; SOC t1 is the first battery charge amount sampling point; SOC t2 is the second battery charge amount sampling point.

2. The automobile low voltage storage battery depletion protection control method according to claim 1, characterized by, the energy grading shutdown step further comprises: S11) obtaining the current charge amount state and available charge amount, if the charge amount state is less than a first charge amount state or the available charge amount is less than a first available charge amount, executing a first energy shutdown program and performing the next step, otherwise re-executing S11, the first charge amount state and the first available charge amount including the power consumption of removing additional functions, the first energy shutdown program including shutting down additional functions; S12) obtaining the current charge amount state and available charge amount, if the charge amount state is less than a second charge amount state or the available charge amount is less than a second available charge amount, executing a second energy shutdown program and performing the next step, otherwise re-executing S12, the second charge amount state and the second available charge amount including the power consumption of removing basic functions, the second energy shutdown program including shutting down basic functions and prompting; S13) obtaining the current charge amount state and available charge amount, if the charge amount state is less than a third charge amount state or the available charge amount is less than a third available charge amount, executing a third energy shutdown program and performing the next step, otherwise, re-executing S13, the third available charge amount state and the third available charge amount including the power consumption when the battery power is low, the energy shutdown program including: powering down the ignition signal.

3. The automobile low voltage storage battery depletion protection control method according to claim 1, characterized by, the first battery power supply switch shutdown condition further comprises: S21) if the charge amount state is less than a fourth charge amount state or the available charge amount is less than a fourth available charge amount, executing the battery power supply switch shutdown, otherwise performing the next step, the fourth available charge amount state and the fourth available charge amount including the power consumption for the next start of the battery; S22) if it is judged according to the battery state judging step that the battery state is poor or the available charge amount is less than the fourth available charge amount, executing the battery power supply switch shutdown.

4. A low-voltage battery power protection device for a vehicle, comprising: a battery data management module, the battery data management module being used to monitor the state of the battery, the state including: the voltage, current and temperature of the battery, the charge amount state and available charge amount of the battery; a battery power supply switch; a body controller, the body controller being used to shut down the ignition signal; a low-voltage energy management module, the low-voltage energy management module being used to receive the state of the battery and execute the low-voltage battery power protection control method for a vehicle as claimed in claims 1-3.

5. The automotive low-voltage storage battery depletion protection device according to claim 4, characterized by The low-voltage energy management module is integrated with a gateway controller, the gateway controller being used to remotely transmit and receive signals.

6. The automotive low-voltage storage battery depletion protection device according to claim 5, characterized by The battery power supply switch is a smart battery power supply switch, the smart battery power supply switch being used to remotely receive signals to control the switch.

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