Control processing method and device for backup battery and vehicle

Abstract

The application provides a control processing method and device of a backup battery and a vehicle. The method comprises the following steps: determining whether the backup battery enters a charging mode according to the real-time temperature of the backup battery after the vehicle starts; if yes, controlling the battery power switch to control the battery voltage acquisition module to detect the real-time voltage of the backup battery based on a start detection voltage control instruction; determining the initial charging mode of the backup battery according to the real-time voltage, and charging the backup battery according to the initial charging mode; after the charging of the backup battery according to the initial charging mode is completed, determining the target charging mode of the backup battery according to the voltage and the real-time temperature of the backup battery at a target time, and continuing to charge the backup battery according to the target charging mode. Different charging modes are determined according to different real-time voltages and real-time temperatures, so as to avoid the problem that the charging efficiency is low due to the fact that the backup battery is charged by using a fixed charging current in the prior art.

Description

Technical Field

[0001] The present application relates to the field of charge and discharge control technology, and in particular to a control processing method, device and vehicle for a backup battery. Background Art

[0002] In order to prevent the on-board communication terminal equipment from failing to work after the on-board power supply is damaged, in addition to using the on-board power supply as the main battery, a rechargeable backup battery will also be set up. Even if the main battery has an abnormality, the backup battery can be used to support the on-board communication terminal equipment to continue working for a period of time.

[0003] Existing backup battery charging and discharging methods have obvious deficiencies in charging efficiency, over-discharge protection, static power consumption, etc., which seriously affect the performance and life of the backup battery as well as the reliability and stability of the vehicle-mounted communication terminal equipment. Summary of the Invention

[0004] The purpose of this application is to address the deficiencies in the above-mentioned prior art and provide a method, device and vehicle for controlling a backup battery, thereby improving the performance and life of the backup battery.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a control processing method for a backup battery, the method comprising:

[0007] Obtaining the real-time temperature of the backup battery after the vehicle is started, and determining whether the backup battery enters a charging mode based on the real-time temperature;

[0008] If so, sending a startup detection voltage control instruction to the battery power switch of the backup battery, so that the battery power switch controls the battery voltage acquisition module to detect the real-time voltage of the backup battery based on the startup detection voltage control instruction;

[0009] determining an initial charging mode of the backup battery according to the real-time voltage, and charging the backup battery according to the initial charging mode, wherein the initial charging mode includes: a first timed charging mode or a second timed charging mode, wherein both the first timed charging mode and the second timed charging mode have fixed charging durations, and the duration of the second timed charging mode is shorter than the duration of the first charging mode;

[0010] After the backup battery is charged according to the initial charging mode, the target charging mode of the backup battery is determined according to the voltage and real-time temperature of the backup battery at the target time, and the backup battery is continued to be charged according to the target charging mode. The target charging mode includes: the initial charging mode or the pulse charging mode, and the pulse charging mode is periodic charging.

[0011] Optionally, determining the initial charging mode of the backup battery according to the real-time voltage includes:

[0012] If the real-time voltage is less than a first preset voltage threshold, determining that the initial charging mode is the first timed charging mode;

[0013] If the real-time voltage is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, the initial charging mode is determined to be the second timed charging mode.

[0014] Optionally, the process of charging the backup battery according to the initial charging mode includes:

[0015] Obtaining the real-time temperature and real-time voltage of the backup battery during charging;

[0016] determining a stop mode of the backup battery according to the real-time temperature and / or real-time voltage of the backup battery during charging, wherein the stop mode includes pausing charging and ending charging;

[0017] Obtain the new real-time voltage and the new real-time temperature of the backup battery after the backup battery is suspended for a preset period of time, determine a new charging mode according to the real-time voltage and the real-time temperature, and continue to charge the backup battery according to the new charging mode.

[0018] Optionally, determining the stop mode of the backup battery according to the real-time temperature and / or real-time voltage of the backup battery during charging includes:

[0019] If the real-time temperature of the backup battery during charging is not within the preset temperature range and the real-time voltage is less than a third preset voltage threshold, determining that the stop mode of the backup battery is to suspend charging;

[0020] If the real-time voltage of the backup battery during the charging process is greater than or equal to a third preset voltage threshold, it is determined that the stop mode for the backup battery is to end charging.

[0021] Optionally, determining the target charging mode of the backup battery according to the voltage of the backup battery at the target time and the real-time temperature of the backup battery includes:

[0022] If the initial charging mode is the first timed charging mode, and the voltage of the backup battery at the target time is greater than a second preset voltage threshold, determining that the target charging mode is the pulse charging mode;

[0023] If the initial charging mode is the first scheduled charging mode, and the voltage of the backup battery at the target time is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, then determining that the target charging mode is the first scheduled charging mode;

[0024] If the initial charging mode is the second timed charging mode, and the voltage of the backup battery at the target time is greater than a second preset voltage threshold, determining that the target charging mode is the pulse charging mode;

[0025] If the initial charging mode is the second timed charging mode, and the voltage of the backup battery at the target time is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, the target charging mode is determined to be the second timed charging mode.

[0026] Optionally, it also includes:

[0027] Obtaining the real-time main power supply voltage of the central control host on the vehicle and status information of the central control host, and determining whether to start the backup battery based on the real-time main power supply voltage and the status information;

[0028] If yes, sending a startup control instruction to the backup battery so that the backup battery starts based on the startup control instruction;

[0029] determining whether to turn off the backup battery according to the real-time voltage of the backup battery after the backup battery is started or the duration of the backup battery being turned on;

[0030] If so, a shutdown control instruction is sent to the backup battery to shut down the backup battery.

[0031] Optionally, the determining whether to turn off the backup battery according to the real-time voltage of the backup battery after the backup battery is started or the duration of the backup battery being turned on includes:

[0032] Obtaining an average voltage of the backup battery at a current moment and a voltage at a moment before the current moment;

[0033] Whether to turn off the backup battery is determined according to the voltage average value, a fourth preset voltage threshold, and the startup time of the backup battery.

[0034] Optionally, the determining whether to turn off the backup battery according to the voltage average value, a fourth preset voltage threshold, and a power-on duration of the backup battery includes:

[0035] If the voltage average value is less than or equal to the fourth preset voltage threshold or the startup time of the backup battery is greater than the preset time threshold, it is determined to shut down the backup battery.

[0036] In a second aspect, an embodiment of the present application further provides a control processing device for a backup battery, comprising a memory and a processor, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, the steps of the control processing method for the backup battery described in the first aspect above are implemented.

[0037] In a third aspect, an embodiment of the present application further provides a vehicle, comprising the processing device described in the second aspect and a backup battery, wherein the backup battery includes a battery power switch.

[0038] The beneficial effects of this application are:

[0039] The present application provides a control and processing method, device, and vehicle for a backup battery, which determines whether to charge the backup battery based on the real-time temperature of the backup battery after the vehicle is started. If so, the initial charging mode of the backup battery is first determined based on the real-time voltage of the backup battery obtained, and the backup battery is charged according to the initial charging mode; after the backup battery is charged according to the initial charging mode, the target charging mode of the backup battery is determined based on the voltage of the backup battery at the target time and the real-time temperature of the backup battery, and the backup battery is continued to be charged according to the target charging mode. When determining the charging mode of the backup battery, the real-time voltage and real-time temperature of the backup battery are taken into consideration, and different charging modes are determined according to different real-time voltages and real-time temperatures, thereby avoiding the problems of low charging efficiency, overcharging, severe heating, and shortened battery life caused by charging the backup battery with a fixed charging current or a fixed charging mode in the prior art, thereby improving the performance and life of the backup battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a structural diagram of a backup battery in the prior art;

[0042] Figure 2 A schematic diagram of the structure of a backup battery provided in an embodiment of the present application;

[0043] Figure 3 A flowchart of a control processing method for a backup battery provided in an embodiment of the present application;

[0044] Figure 4 A flowchart of another backup battery control processing method provided in an embodiment of the present application;

[0045] Figure 5 A schematic diagram of a complete flow chart of charging control of a backup battery provided in an embodiment of the present application;

[0046] Figure 6 A flowchart of another backup battery control method provided in an embodiment of the present application;

[0047] Figure 7 A flowchart of another backup battery control method provided in an embodiment of the present application;

[0048] Figure 8 A schematic diagram of a flow chart of a backup battery discharging process provided in an embodiment of the present application;

[0049] Figure 9 This is a structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0051] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0052] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0053] Existing backup batteries have the following disadvantages during the charging and discharging process:

[0054] First, existing technologies typically charge backup batteries in telematics boxes (TBOXes) using a fixed charging current, a simple constant current and constant voltage charging mode, or a continuous charging mode. This fixed charging current can lead to overcharging and severe heating in aging batteries or high-temperature environments, shortening battery life and inefficient charging.

[0055] Second, during the discharge process, existing over-discharge protection mechanisms are often insensitive. Some TBOX backup battery systems only set a single lower voltage limit as the over-discharge protection threshold, triggering protection only when the battery voltage drops below this threshold. However, in actual use, the battery voltage drops rapidly when approaching the over-discharge threshold. Once detected, irreversible damage may have already occurred to the battery, and the battery charge is low. If the backup battery is still used at this time, not only will the original operating time be reduced, but excessive use will also affect the battery life. Therefore, existing over-discharge protection for backup batteries is not timely.

[0056] Third, for some TBOX devices that require long periods of continuous operation, the backup battery may enter a deep discharge state when the main power supply fails. Existing technologies have not considered how to avoid or minimize the impact of this deep discharge on battery life. Frequent deep discharge can damage the battery electrode material structure, increase internal resistance, reduce capacity, and significantly shorten the battery's service life. Therefore, deep discharge of the backup battery can affect its lifespan.

[0057] Fourth, the controller-related detection circuit of the automobile with a backup battery still maintains basic work through the normal power supply path after the vehicle is turned off, such as voltage sampling, MCU standby, reference source retention, etc., forming a continuous microampere current consumption (typical value 50-200 μA, and the selection of the voltage dividing resistor is not appropriate, and the current consumption may be greater). This power consumption superimposes the inherent self-discharge rate of the backup battery (about 3-5% / month for lead-acid batteries and about 1-2% / month for lithium batteries), causing the battery capacity to accelerate decay, and in extreme cases, the backup battery life may be shortened by more than 30%. Therefore, the existing backup battery has high power consumption in a static state. If the vehicle is parked for more than 30 days after being turned off, the continuous power consumption of the detection circuit may cause the remaining capacity (SOC) of the backup battery to fall below the safety threshold (such as when the SOC of the lead-acid battery is less than 50%, the plate sulfate is intensified), which will result in: related controller data loss, such as key information such as fault codes and adaptive parameters stored in RAM lost due to power failure; emergency function failure, such as the backup power supply of the airbag and the electronic handbrake system that relies on the backup battery cannot be activated. At -20°C or below, the available capacity of the battery decreases by 40-60%, and superimposed with the static power consumption of the detection circuit, it may trigger a false low battery warning, or even force the system into a protective shutdown state.

[0058] In summary, the existing TBOX backup battery has obvious shortcomings in many aspects during the charging and discharging process, which seriously affects the performance, life of the backup battery, and the reliability and stability of the TBOX device. Therefore, in view of the shortcomings of the existing backup battery in the prior art, a control processing method for a backup battery is proposed.

[0059] Figure 1 Figure 1 is a structural diagram of a backup battery in the prior art, Figure 2 Figure 2 is a structural diagram of a backup battery provided by an embodiment of the present application. From Figure 1 It can be seen from the structure of the existing backup battery in

[0060] The structure of the backup battery in the present application is shown in Figure 2 In the present application, the battery power switch of the backup battery is used to control the battery voltage acquisition module. As shown in Figure 2 In the present application, a double transistor Q1 with a built-in bias resistor can be used as the battery power switch of the backup battery, as shown in Figure 2As shown, the first end of the double transistor Q1 is grounded, the second end of the transistor switch module is connected with the control processing device of the backup battery through the resistor R7, the third end of the double transistor Q1 is connected with one end of the resistor R8, the fourth end of the double transistor Q1 is connected with the first output end of the backup battery, wherein the first output end of the backup battery is the positive electrode of the backup battery, and the fifth end of the double transistor Q1 is connected with the sixth end of the double transistor Q1.

[0061] With reference to the foregoing Figure 2 , the other end of the resistor R8 is connected with one end of the resistor R10 and one end of the resistor R9 respectively, the other end of the resistor R10 is connected with one end of the capacitor C5 and the battery voltage acquisition module respectively, and the other end of the resistor R9 is connected with the other end of the capacitor C5. Wherein, the resistor R8 and the resistor R9 are the bias resistors in the battery power switch, and the resistance ratio of R8 and R9 is fixed. If the resistance of R8 and R9 is amplified at the same time, the static power consumption of the battery voltage acquisition module can be reduced.

[0062] Optionally, when the control processing device of the backup battery outputs high level to the second end of the double transistor Q1, the first end and the sixth end of the double transistor Q1 are turned on based on the high level, and the fifth end of the double transistor Q1 and the sixth end of the double transistor Q1 are grounded at this time. Since the fifth end of the double transistor Q1 is grounded, the third end of the double transistor Q1 and the fourth end of the double transistor Q1 are turned on at this time, and the double transistor Q1 is turned on at this time, and the battery voltage acquisition module is connected to the backup battery circuit.

[0063] The structure of the backup battery in the present application can also include a battery temperature acquisition module, which is connected with the second output end of the backup battery, and the third output end of the backup battery is grounded.

[0064] Optionally, the battery voltage acquisition module can acquire the real-time voltage of the backup battery during charging and discharging; the control processing device of the backup battery can send a start detection voltage control instruction to the transistor switch module; the battery power switch of the backup battery can control the battery voltage acquisition module to acquire the real-time voltage of the backup battery based on the start detection voltage control instruction. In addition, the control processing device of the backup battery can send a start control instruction to the backup battery to make the backup battery start based on the start control instruction and supply power to the central control host. The control processing device of the backup battery can control the charging and discharging of the backup battery by using the control processing method of the backup battery provided in the present application.

[0065] Specifically, when the backup battery needs to be used to power peripheral devices or the voltage of the backup battery needs to be detected, the control processing device of the backup battery provides a start-up detection voltage control instruction to turn on the battery power switch Q1 of the backup battery; when the backup battery voltage does not need to be detected, the control processing device of the backup battery provides a shut-down detection voltage control instruction, and the battery power switch Q1 of the backup battery is not turned on, which effectively avoids the static power consumption superposition problem caused by the battery voltage acquisition module when the backup battery is not in use.

[0066] Optionally, using a transistor as a battery power switch for the backup battery can also prevent the battery voltage from flowing back into other circuits, which not only avoids increasing static power consumption but also avoids damaging devices on other circuits.

[0067] It is worth noting that in addition to using transistors as battery power switches for backup batteries, this application can also use fixed relays, load switches, magnetic latching relays, energy harvesting plus supercapacitors or voltage monitoring ICs in conjunction with PMICs to achieve on-off control of the battery power switch.

[0068] Figure 3 A flowchart of a control processing method for a backup battery provided in an embodiment of the present application is shown as follows: Figure 3 As shown, the method is applied to the control processing device of the backup battery mentioned above, and the method may include:

[0069] S101. Obtain the real-time temperature of the backup battery after the vehicle is started.

[0070] Specifically, after the vehicle is started, the temperature acquisition module of the backup battery can acquire the real-time temperature of the backup battery and send the acquired real-time temperature of the backup battery to the control processing device of the backup battery.

[0071] S102: Determine whether the backup battery enters a charging mode according to the real-time temperature.

[0072] Specifically, when the control processing device of the backup battery receives the real-time temperature of the backup battery after the vehicle is started, it can determine whether the backup battery enters the charging mode based on the real-time temperature. Specifically, if the real-time temperature of the backup battery after the vehicle is started is within the preset temperature range, it is determined that the backup battery can enter the charging mode and the following step S103 is executed. The preset temperature range can be, for example, greater than -20°C and less than 70°C, that is, -20°C <T<70℃,其中,T为实时温度。

[0073] Optionally, if the real-time temperature of the backup battery is not at -20°C after the vehicle is started <T<70℃范围内时,执行下述步骤S106。

[0074] S103: Sending a startup detection voltage control instruction to the battery power switch of the backup battery, so that the battery power switch controls the battery voltage acquisition module to detect the real-time voltage of the backup battery based on the startup detection voltage control instruction.

[0075] Specifically, after the control processing device of the backup battery determines that the backup battery can enter the charging mode, the control processing device of the backup battery can send a start-up detection voltage control instruction to the battery power switch of the backup battery, wherein the start-up detection voltage control instruction can be a high level, for example. When the battery power switch of the backup battery receives the start-up detection voltage control instruction, it is turned on. When the battery power switch of the backup battery is turned on, the battery voltage acquisition module can detect the real-time voltage of the backup battery.

[0076] S104: Determine an initial charging mode of the backup battery according to the real-time voltage, and charge the backup battery according to the initial charging mode.

[0077] The initial charging mode may include a first timed charging mode or a second timed charging mode. Both the first timed charging mode and the second timed charging mode have fixed charging durations, and the duration of the second timed charging mode is shorter than that of the first charging mode.

[0078] Optionally, when the real-time voltage of the backup battery after the vehicle is started is different, the charging mode for charging the backup battery is also different. Therefore, when the control processing device of the backup battery receives the real-time voltage of the backup battery after the vehicle is started, it can use a preset method to determine the initial charging mode of the backup battery according to the difference in real-time voltage.

[0079] S105 . After charging the backup battery according to the initial charging mode, determine a target charging mode for the backup battery according to the voltage and real-time temperature of the backup battery at the target time, and continue charging the backup battery according to the target charging mode.

[0080] The target charging mode may include an initial charging mode or a pulse charging mode. The pulse charging mode is a periodic charging mode. For example, a cycle of the pulse charging mode is charging for 1 second and resting for 4 minutes and 59 seconds.

[0081] The target time may refer to a time period after the completion of the initial charging mode, and the time period may be, for example, 9 minutes, 10 minutes, 11 minutes, 12 minutes, 13 minutes, 14 minutes, 15 minutes, etc. Specifically, after the completion of the initial charging mode, the voltage of the backup battery and the real-time temperature of the backup battery are detected after a certain period of time. For example, after the completion of the initial charging mode, the voltage of the backup battery is detected 10 minutes later, and the detected voltage and real-time temperature are sent to the control processing device of the backup battery. Then, the control processing device of the backup battery receives the voltage of the backup battery at the target time period after the completion of the initial charging mode and the certain period of time.

[0082] S106: Turn off the vehicle after a preset time interval.

[0083] For example, the preset time period may be 10 minutes. That is, if it is determined that the temperature of the backup battery does not meet the preset temperature range, the vehicle is turned off after 10 minutes. When the user restarts the vehicle, step S101 is executed again.

[0084] In this embodiment, whether to charge the backup battery is determined based on the real-time temperature of the backup battery after the vehicle is started. If so, the initial charging mode of the backup battery is first determined based on the real-time voltage of the backup battery, and the backup battery is charged according to the initial charging mode. After charging the backup battery according to the initial charging mode, the target charging mode of the backup battery is determined based on the voltage of the backup battery at the target time and the real-time temperature of the backup battery, and the backup battery is continued to be charged according to the target charging mode. When determining the charging mode of the backup battery, the real-time voltage and real-time temperature of the backup battery are taken into consideration, and different charging modes are determined based on different real-time voltages and real-time temperatures. This avoids the problems of low charging efficiency, overcharging, severe heating, and shortened battery life caused by charging the backup battery with a fixed charging current or a fixed charging mode in the prior art, thereby improving the performance and life of the backup battery.

[0085] Optionally, determining the initial charging mode of the backup battery according to the real-time voltage in S104 may include:

[0086] Specifically, if the real-time voltage of the backup battery after the vehicle is started is less than a first preset voltage threshold, the initial charging mode is determined to be the first timed charging mode.

[0087] The first preset voltage threshold is 3.92V, and the first timed charging mode can be continuous charging for 3 hours. Then, when the real-time voltage of the backup battery is less than 3.92 after the vehicle is started, in order to quickly restore the power of the backup battery, continuous charging for 3 hours is performed.

[0088] If the real-time voltage of the backup battery after the vehicle is started is greater than or equal to a first preset voltage threshold and less than or equal to a second preset voltage threshold, the initial charging mode is determined to be the second timed charging mode. The second preset voltage threshold may be 3.98V, and the first timed charging mode may be continuous charging for two hours. Therefore, if the real-time voltage of the backup battery after the vehicle is started is greater than or equal to 3.92V and less than or equal to 3.98V, that is, 3.92V≤V≤3.98V, the backup battery is charged continuously for two hours.

[0089] In this embodiment, the initial charging mode of the backup battery is determined based on the temperature and voltage of the backup battery after the vehicle is started, so that the initial charging mode of the backup battery is more in line with the current situation of the backup battery, avoiding the problem of using a fixed charging method to directly charge the backup battery, which greatly shortens the service life of the backup battery.

[0090] Figure 4 A flow chart of another method for controlling a backup battery provided in an embodiment of the present application is shown as follows: Figure 4 As shown, the process of charging the backup battery according to the initial charging mode in the above S104 may include:

[0091] S201: Acquire the real-time temperature and real-time voltage of the backup battery during the charging process.

[0092] Optionally, when the backup battery is charged using the initial charging mode, the real-time voltage of the backup battery during the charging process can be collected through the battery voltage collection module, and the real-time temperature of the backup battery during the charging process can be collected through the temperature collection module, and the collected real-time temperature and real-time voltage of the backup battery during charging in the initial charging mode are sent to the control processing device of the backup battery.

[0093] S202: Determine a stop mode of the backup battery according to the real-time temperature and / or real-time voltage of the backup battery during charging.

[0094] The stop mode may include pausing charging and ending charging. Pausing charging means temporarily stopping charging the backup battery using the initial charging mode; ending charging means ending charging of the backup battery, i.e., shutting down the vehicle.

[0095] S203: Obtain the new real-time voltage and temperature of the backup battery after the backup battery is suspended for a preset period of time, determine a new charging mode according to the new real-time voltage and temperature, and continue charging the backup battery according to the new charging mode.

[0096] Optionally, when the stop mode is to pause charging, after the preset duration of charging pause, the new real-time temperature and new real-time voltage of the backup battery after the preset duration can be re-obtained, and the new charging mode of the backup battery can be re-determined based on the new real-time temperature and new real-time voltage after the preset duration.

[0097] Specifically, if the new real-time temperature of the backup battery after the preset pause period is within the preset temperature range, and the new real-time voltage of the backup battery is less than a first preset voltage threshold, the new charging mode of the backup battery is determined to be the first scheduled charging mode, and the backup battery continues to be charged according to the first scheduled charging mode. If the new real-time temperature of the backup battery after the preset pause period is not within the preset temperature range, the pause mode is iteratively executed until the new real-time temperature of the backup battery is within the preset temperature range, at which point the pause mode is terminated and the backup battery continues to be charged using the first scheduled charging mode.

[0098] If, after pausing for the preset time period, the new real-time temperature of the backup battery is within the preset temperature range, and the new real-time voltage is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, then the new charging mode of the backup battery is determined to be the second scheduled charging mode, and the backup battery continues to be charged according to the second scheduled charging mode. If, after pausing for the preset time period, the new real-time temperature of the backup battery is not within the preset temperature range, then the pause mode is iteratively executed until the new real-time temperature of the backup battery is within the preset temperature range, at which point the pause mode is terminated and the backup battery continues to be charged using the second scheduled charging mode.

[0099] If, after the preset pause period, the new real-time temperature of the backup battery is within the preset temperature range, and the new real-time voltage is greater than a second preset voltage threshold, the new charging mode of the backup battery is determined to be the pulse charging mode, and the backup battery continues to be charged in the pulse charging mode. If, after the preset pause period, the new real-time temperature of the backup battery is not within the preset temperature range, the pause mode is iteratively executed until the new real-time temperature of the backup battery is within the preset temperature range, at which point the pause mode is terminated and the backup battery continues to be charged in the pulse charging mode.

[0100] It is worth noting that, when the backup battery is charged in the target charging mode, the above steps S201 to S203 are also executed. The execution method and steps are similar to those in the initial charging mode, and are not described in detail here.

[0101] Optionally, the above S202, determining the stop mode of the backup battery according to the real-time temperature and / or real-time voltage, may include:

[0102] If the real-time temperature of the backup battery during charging is not within the preset temperature range and the real-time voltage is less than a third preset voltage threshold, the stop mode of the backup battery is determined to be charging pause.

[0103] If the real-time voltage of the backup battery during charging is greater than or equal to a third preset voltage threshold, the stop mode for the backup battery is determined to be charging termination, wherein the third preset voltage threshold is 4.95V.

[0104] In this embodiment, the real-time voltage and temperature of the backup battery are also taken into consideration during the backup battery charging process, and the charging mode of the backup battery is dynamically adjusted according to the real-time voltage and temperature of the backup battery during the charging process, thereby improving the charging efficiency of the backup battery.

[0105] Optionally, the above S105, determining the target charging mode of the backup battery according to the voltage and real-time temperature of the backup battery at the target time, may include:

[0106] If the initial charging mode is the first scheduled charging mode, and the voltage of the backup battery at the target time is greater than the second preset voltage threshold, the target charging mode is determined to be the pulse charging mode. Specifically, if the voltage of the backup battery is greater than 3.98V 10 minutes after charging is completed using the first scheduled charging mode, the target charging mode of the backup battery is determined to be the pulse charging mode. That is, after charging is completed using the first scheduled charging mode, the backup battery is charged using the pulse charging mode.

[0107] If the initial charging mode is the first scheduled charging mode, and the voltage of the backup battery at the target time is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, the target charging mode is determined to be the second scheduled charging mode. Specifically, if the voltage of the backup battery is greater than or equal to 3.92V and less than or equal to 3.98V 10 minutes after charging is completed using the first scheduled charging mode, the target charging mode of the backup battery is determined to be the second scheduled charging mode, that is, after charging is completed using the first scheduled charging mode, the backup battery continues to be charged using the first scheduled charging mode.

[0108] If the initial charging mode is the second timed charging mode, and the voltage of the backup battery at the target time is greater than the second preset voltage threshold, the target charging mode is determined to be the pulse charging mode. Specifically, if the voltage of the backup battery is greater than 3.98V 10 minutes after charging is completed using the second timed charging mode, the target charging mode of the backup battery is determined to be the pulse charging mode. That is, after charging is completed using the second timed charging mode, the backup battery is charged using the pulse charging mode.

[0109] If the initial charging mode is the second timed charging mode, and the voltage of the backup battery at the target time is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, it is determined that the target charging mode is the second timed charging mode. Specifically, after 10 minutes of charging using the second timed charging mode, if the voltage of the backup battery is greater than or equal to 3.92v and less than or equal to 3.98v, it is determined that the target charging mode of the backup battery is the second timed charging mode, that is, after the second timed charging mode is completed, the backup battery continues to be charged using the second charging mode.

[0110] In this embodiment, after the backup battery is charged according to the initial charging mode, the target charging mode of the backup battery is determined again according to the voltage and temperature of the backup battery, so that the backup battery uses different charging modes at different voltages, which greatly improves the charging efficiency of the battery.

[0111] Figure 5 A complete flowchart of the charging control of the backup battery provided in the embodiment of the present application is shown in FIG. 1, Figure 5 The steps S301-S302 in FIG. 1 are the same as the steps S101-S102 in the foregoing specific embodiments. Figure 5 The steps S3014-S3018 in FIG. 1 are the same as the step S104 in the foregoing specific embodiments, specifically, the process of charging the backup battery according to the first timed charging mode; Figure 5 The steps S308-S3013 in FIG. 1 are also the same as the step S104 in the foregoing specific embodiments, specifically, the process of charging the backup battery according to the second timed charging mode. Figure 5 The steps S303-S307 in FIG. 1 are the same as the process of continuing to charge the backup battery according to the target charging mode in the step S105 in the foregoing specific embodiments. Among them, Figure 5 The steps S3014, S309 and S305 in FIG. 1 are the same as the step S202 in the foregoing specific embodiments, Figure 5 The steps S3014, S309 and S305 shown in FIG. 1 all omit the step of judging whether the real-time voltage of the backup battery is less than the third preset voltage threshold when the real-time temperature of the backup battery in the charging process is not in the preset temperature range. However, in the actual method steps, the steps S3014, S309 and S305 are the same as the step S202 in the foregoing specific embodiments.

[0112] It is worth noting that when the backup battery is charged according to the first timed charging mode, the second timed charging mode and the pulse charging mode respectively, it can be judged whether the vehicle is powered off, and if the vehicle is powered off, the charging of the backup battery is directly ended.

[0113] Figure 6 A flowchart of another method for controlling a backup battery provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the method may further include:

[0114] S401: Acquire the real-time main power supply voltage and status information of the central control host on the vehicle.

[0115] Optionally, the main power supply voltage refers to the voltage of the main battery when the main battery is providing power to the central control host. That is, when the main battery is operating, the real-time main power supply voltage of the main battery is collected in real time. Specifically, the main power supply voltage can be collected at a first preset interval, where the first preset interval can be 2ms. Therefore, the real-time main power supply voltage of the main battery can be collected in real time at a 2ms period. The status information of the central control host may include: normal power state and ignition cycle state.

[0116] S402: Determine whether to start the backup battery according to the real-time main power voltage and status information.

[0117] The real-time main power supply voltage of the main battery can reflect whether the main battery can still supply power to the central control host at the current moment, and the status information of the central control host can represent the status of the central control host at the current moment.

[0118] Specifically, if the state information of the central control host is normal mode and ignition state, and the real-time main power supply voltage of the central control host is less than a fifth preset voltage threshold, it is determined to start the backup battery. The fifth preset voltage threshold may be 9V, for example.

[0119] Specifically, if the VIN code is written into the central control host, the central control host is in normal mode, and the backup battery can be enabled in this normal mode. If the VIN code is not written into the central control host, the central control host is in factory mode, and the backup battery cannot be enabled in this factory mode. If "KL15 is enabled" is in the central control host, it means that the central control host is in ignition state at this time. If the central control host is not "KL15 enabled", the central control host is in standby state, and the backup battery is not started at this time. When the central control host is in normal mode and in ignition state, whether to start the backup battery is determined based on the real-time main power supply voltage. When the real-time main power supply voltage of the main battery is less than 9V, it means that the main battery cannot supply power to the central control host at this time, and then it is determined to start the backup battery.

[0120] Optionally, if it is determined to start the backup battery, the following step S403 may be executed; otherwise, the following step S407 may be executed.

[0121] S403: Send a startup control instruction to the battery power switch of the backup battery, so that the battery power switch starts the backup battery based on the startup control instruction.

[0122] Specifically, after the backup battery control processing device determines to start the backup battery, it can send a startup control instruction to the backup battery. Upon receiving the startup control instruction, the backup battery starts and supplies power to the central control host, at which point the backup battery enters discharge mode. The startup control instruction can include enabling the backup battery's boost circuit. Simultaneously, when starting the backup battery, a detection voltage control signal can be sent to the backup battery's power switch, causing the battery voltage acquisition module to collect the backup battery's real-time voltage after startup.

[0123] S404: Determine whether to turn off the backup battery according to the real-time voltage of the backup battery after the backup battery is started or the duration of the backup battery being turned on.

[0124] Optionally, after the backup battery is started, that is, when the backup battery is in discharge mode, the battery voltage acquisition module may acquire the real-time voltage of the backup battery after startup. The backup battery control processing device may determine whether to shut down the backup battery based on the real-time voltage of the backup battery after startup or the duration of the backup battery being on.

[0125] Specifically, if it is determined to turn off the backup battery, execute the following step S405; otherwise, execute the following step S406.

[0126] S405: Send a shutdown control instruction to the backup battery to shut down the backup battery.

[0127] Specifically, when the backup battery control processing device determines that the backup battery needs to be shut down, it sends a shutdown control instruction to the backup battery, thereby shutting down the backup battery and causing it to stop supplying power to the central control unit. Simultaneously, the backup battery control processing device can send a shutdown voltage detection control instruction to the backup battery's power switch. At this point, the battery power switch is turned off, and the battery voltage acquisition module stops acquiring the backup battery's voltage.

[0128] S406. Continue to use the backup battery to supply power to the central control host.

[0129] S407: Determine not to enable the backup battery.

[0130] In this embodiment, when the real-time main power supply voltage of the main battery is less than the fifth preset voltage threshold and the central control unit is in a normal state with the ignition on, the backup battery is activated and put into operation. When the backup battery is deactivated, the battery voltage acquisition module for the backup battery is also deactivated, thereby avoiding static power loss caused by the battery voltage acquisition module.

[0131] Figure 7 A flowchart of another method for controlling a backup battery provided in an embodiment of the present application is shown in FIG.Figure 7 As shown, the above S404, determining whether to turn off the backup battery according to the real-time voltage of the backup battery after the backup battery is started or the length of time the backup battery is turned on, may include:

[0132] S501: Obtain an average voltage of the backup battery at a current moment and a voltage at a moment before the current moment.

[0133] The current moment refers to any moment after the backup battery is started.

[0134] If the voltage acquisition module acquires the voltage of the backup battery every 1 second, the voltage at the first second and the voltage at the second second may be averaged to obtain an average voltage value of the first second and the second second.

[0135] S502: Determine whether to turn off the backup battery according to the voltage average value, a fourth preset voltage threshold, and the duration of the backup battery being turned on.

[0136] The fourth preset voltage threshold may be, for example, 3.5V.

[0137] If the voltage average value is less than or equal to the fourth preset voltage threshold or the backup battery is turned on for longer than a preset time threshold, it is determined to turn off the backup battery.

[0138] In this embodiment, when the boost circuit of the backup battery is turned on for a preset time threshold or is less than or equal to the fourth preset voltage threshold, the boost circuit of the backup battery will be turned off to prevent the backup battery from being over-powered, thereby preventing the backup battery from being continuously discharged and causing over-discharge problems.

[0139] Optionally, when the voltage of the backup battery is less than or equal to the fourth preset voltage threshold, that is, less than or equal to 3.5V, it indicates that the backup battery does not meet the working requirements of the host, and the backup battery is turned off at this time. However, because the power consumption of the device is not fixed, it is sometimes large and sometimes small, which causes the voltage of the backup battery to fluctuate. When the voltage detected by the battery voltage acquisition module is less than or equal to 3.5V, the power of the backup battery is immediately cut off. However, in fact, the voltage of the backup battery may still be high at this time because the fluctuation of the load causes the battery voltage to be temporarily pulled down. Therefore, in this embodiment, the average voltage value is used to determine whether to turn off the backup battery, so that the basis for turning off the backup battery is more accurate and avoids accidental shutdown.

[0140] Figure 8 A flow chart of the backup battery discharging process provided in an embodiment of the present application is provided. Figure 8 S601 to S6010 in the above-mentioned specific real-time method are the same as the steps S401 to S405, and the number of steps is not repeated.

[0141] Optionally, a multi-parameter threshold model can also be used in the control device of the backup battery in the present application. For example, it can determine whether to start the backup battery based on the main power supply voltage fluctuation, load current mutation and battery health collected in real time, combined with time series analysis. A hysteresis comparison algorithm is used to avoid frequent switching. For example, the backup power supply is started after the main power supply voltage is lower than 10.8V (12V system) for 500ms. The main power supply voltage fluctuation threshold can be a ±5% tolerance. If the main power supply voltage fluctuation collected in real time exceeds the ±5% tolerance, an alarm message is sent. The load current mutation threshold can be 20% of the rated value. If the load current mutation collected in real time exceeds 20%, an alarm message is sent. The backup battery health threshold can be 80%. If the determined backup battery health is less than 80%, an alarm message is sent.

[0142] Optionally, the backup battery control device of the present application may also utilize a dynamic priority scheduling method. For example, a load grading matrix may be established, such as a priority level of 1 for core devices and 3 for auxiliary devices. Non-critical loads on the central control host may also be automatically disconnected when the backup battery capacity falls below 30%. The backup battery control device may obtain the power consumption of each module on the central control host in real time via the CAN bus or Modbus protocol, and implement millisecond-level load scheduling response based on the acquired power consumption of each module.

[0143] Figure 9 This is a structural block diagram of a control processing device for a backup battery provided in an embodiment of the present application. Figure 9 As shown, the electronic device may include: a processor 701 and a memory 702.

[0144] Optionally, a bus 703 may also be included, wherein the memory 702 is used to store machine-readable instructions executable by the processor 701. When the electronic device 700 is running, the processor 701 communicates with the memory 702 through the bus 703. When the machine-readable instructions are executed by the processor 701, the method steps in the above method embodiment are performed.

[0145] An embodiment of the present application further provides a vehicle, which may include the control processing device for the backup battery and the backup battery in the aforementioned specific embodiments, wherein the backup battery includes a battery power switch.

[0146] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0147] In addition, the functional units in the various embodiments of the present application can be integrated into a single processing unit, each unit can exist physically separately, or two or more units can be integrated into a single unit. If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the portion that contributes to the prior art, or the portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0148] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.

Claims

1. A control method for a backup battery, characterized in that: The method comprises: Obtaining the real-time temperature of the backup battery after the vehicle is started, and determining whether the backup battery enters a charging mode based on the real-time temperature; If so, sending a startup detection voltage control instruction to the battery power switch of the backup battery, so that the battery power switch controls the battery voltage acquisition module to detect the real-time voltage of the backup battery based on the startup detection voltage control instruction; determining an initial charging mode of the backup battery according to the real-time voltage, and charging the backup battery according to the initial charging mode, wherein the initial charging mode includes: a first timed charging mode or a second timed charging mode, wherein both the first timed charging mode and the second timed charging mode have fixed charging durations, and the duration of the second timed charging mode is shorter than the duration of the first timed charging mode; After charging the backup battery according to the initial charging mode is completed, determining a target charging mode for the backup battery according to the voltage and real-time temperature of the backup battery at a target time, and continuing to charge the backup battery according to the target charging mode, wherein the target charging mode includes: the initial charging mode or a pulse charging mode, wherein the pulse charging mode is periodic charging; The determining the target charging mode of the backup battery according to the voltage of the backup battery at the target time and the real-time temperature of the backup battery includes: If the initial charging mode is the first timed charging mode, and the voltage of the backup battery at the target time is greater than a second preset voltage threshold, determining that the target charging mode is the pulse charging mode; If the initial charging mode is the first timed charging mode, and the voltage of the backup battery at the target time is greater than or equal to a first preset voltage threshold and less than or equal to a second preset voltage threshold, determining that the target charging mode is the second timed charging mode; If the initial charging mode is the second timed charging mode, and the voltage of the backup battery at the target time is greater than a second preset voltage threshold, determining that the target charging mode is the pulse charging mode; If the initial charging mode is the second timed charging mode, and the voltage of the backup battery at the target time is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, the target charging mode is determined to be the second timed charging mode.

2. The control processing method of the backup battery according to claim 1, characterized in that: The determining the initial charging mode of the backup battery according to the real-time voltage includes: If the real-time voltage is less than a first preset voltage threshold, determining that the initial charging mode is the first timed charging mode; If the real-time voltage is greater than or equal to the first preset voltage threshold and less than or equal to the second preset voltage threshold, the initial charging mode is determined to be the second timed charging mode.

3. The control processing method of the backup battery according to claim 1, characterized in that: The process of charging the backup battery according to the initial charging mode includes: Obtaining the real-time temperature and real-time voltage of the backup battery during charging; determining a stop mode of the backup battery according to the real-time temperature and / or real-time voltage of the backup battery during charging, wherein the stop mode includes pausing charging and ending charging; Obtain the new real-time voltage and the new real-time temperature of the backup battery after the backup battery is suspended for a preset period of time, determine a new charging mode according to the real-time voltage and the real-time temperature, and continue to charge the backup battery according to the new charging mode.

4. The control processing method of the backup battery according to claim 3, characterized in that: The step of determining the stop mode of the backup battery according to the real-time temperature and / or real-time voltage of the backup battery during charging includes: If the real-time temperature of the backup battery during charging is not within the preset temperature range and the real-time voltage is less than a third preset voltage threshold, determining that the stop mode of the backup battery is to suspend charging; If the real-time voltage of the backup battery during the charging process is greater than or equal to a third preset voltage threshold, it is determined that the stop mode for the backup battery is to end charging.

5. The control processing method of the backup battery according to claim 1, characterized in that: Also includes: Obtaining the real-time main power supply voltage of the central control host on the vehicle and status information of the central control host, and determining whether to start the backup battery based on the real-time main power supply voltage and the status information; If yes, sending a startup control instruction to the backup battery so that the backup battery starts based on the startup control instruction; determining whether to turn off the backup battery according to the real-time voltage of the backup battery after the backup battery is started or the duration of the backup battery being turned on; If so, a shutdown control instruction is sent to the backup battery to shut down the backup battery.

6. The control processing method of the backup battery according to claim 5, characterized in that: The determining whether to turn off the backup battery according to the real-time voltage of the backup battery after the backup battery is started or the duration of the backup battery being turned on includes: Obtaining an average voltage of the backup battery at a current moment and a voltage at a moment before the current moment; Whether to turn off the backup battery is determined according to the voltage average value, a fourth preset voltage threshold, and the startup time of the backup battery.

7. The control processing method of the backup battery according to claim 6, characterized in that: The determining whether to turn off the backup battery according to the voltage average value, the fourth preset voltage threshold, and the power-on time of the backup battery includes: If the voltage average value is less than or equal to the fourth preset voltage threshold or the startup time of the backup battery is greater than the preset time threshold, it is determined to shut down the backup battery.

8. A control and processing device for a backup battery, characterized in that: The system comprises a memory and a processor, wherein the memory stores a computer program executable by the processor, and the processor implements the steps of the backup battery control processing method according to any one of claims 1 to 7 when executing the computer program.

9. A vehicle, characterized in that: It comprises the control processing device according to claim 8 and a backup battery, wherein the backup battery includes a battery power switch.

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