Battery state determination method and device, vehicle-mounted terminal and vehicle

Abstract

The embodiment of the invention is suitable for the technical field of automobiles, and provides a battery state determination method and device, a vehicle-mounted terminal and a vehicle. The method comprises the steps that working data of a brake battery corresponding to a state judgment scene is obtained; the state judgment scene comprises an electric quantity judgment scene; the working data corresponding to the electric quantity judgment scene comprises a capacitance value of the brake battery and the residual electric quantity of the brake battery; and determining the battery state of the brake battery based on the working data and a judgment condition corresponding to the state judgment scene. According to the method provided by the embodiment of the invention, calculation can be performed by combining the capacitance value and the residual electric quantity of the brake battery in an electric quantity judgment scene of the vehicle-mounted terminal, so that the determination accuracy of the battery state is improved.

Description

Technical Field

[0001] The embodiments of the present application belong to the field of automobile technology, and in particular, relate to a battery status determination method, device, vehicle-mounted terminal, and vehicle. Background Art

[0002] In recent years, with the development of vehicle electrification and intelligence, vehicle braking systems have also begun to evolve into wire-controlled braking systems. The wire-controlled braking system is mainly composed of electronic control units, pedal sensors, brakes and other components. When the driver steps on the pedal, the pedal sensor can convert the collected pedal opening value into an input electrical signal and transmit it to the electronic control unit. The electronic control unit generates an output electrical signal after calculation based on the input electrical signal, and transmits the output electrical signal to the brake to lock the wheel through the brake to complete the braking.

[0003] Since the transmission of electrical signals in the wire-controlled brake system consumes electrical energy, the wire-controlled brake system is often equipped with a battery module to provide electrical energy for various components in the wire-controlled brake system. In the prior art, in order to ensure the availability of the wire-controlled brake system, the vehicle-mounted terminal needs to continuously detect the remaining power (State Of Charge, SOC) of the battery module in the brake system through a sensor, and determine whether the battery module is in an available state based on the remaining power. However, the remaining power collected by the sensor in real time may be affected by factors such as the environment and the detection accuracy of the sensor. Therefore, the accuracy of determining the available state of the battery module based only on the remaining power is low. Summary of the invention

[0004] In view of this, embodiments of the present application provide a battery status determination method, device, vehicle-mounted terminal and vehicle to improve the accuracy of determining the battery status.

[0005] A first aspect of an embodiment of the present application provides a method for determining a battery status, comprising:

[0006] Acquire working data of the brake battery corresponding to a state judgment scenario; the state judgment scenario includes a power judgment scenario; the working data corresponding to the power judgment scenario includes a capacitance value of the brake battery and a remaining power of the brake battery;

[0007] The battery state of the brake battery is determined based on the working data and the judgment condition corresponding to the state judgment scenario.

[0008] In a possible implementation manner of the first aspect, the judgment condition includes a charging threshold and a braking requirement value corresponding to the power judgment scenario; the braking requirement value is less than the charging threshold;

[0009] The determining the battery state of the brake battery based on the working data and the judgment condition corresponding to the state judgment scenario includes:

[0010] determining an actual available power of the brake battery based on the capacitance value and the remaining power;

[0011] If the actual available power is less than or equal to the braking demand value corresponding to the vehicle model information, determining that the brake battery is in an unavailable state;

[0012] If the actual available power is greater than the braking demand value and the actual available power is less than the charging threshold, it is determined that the brake battery is in a state to be charged.

[0013] In a possible implementation manner of the first aspect, after determining that the brake battery is in an unusable state, the method includes:

[0014] Based on the current driving speed of the vehicle, controlling the braking system of the vehicle to perform an assisted parking operation, and displaying a fifth prompt message; the fifth prompt message is used to inform the driver that the brake battery of the current vehicle is in an unusable state;

[0015] After determining that the brake battery is in a state to be charged, the method further comprises:

[0016] A charging instruction is initiated to a charging control module in the braking system, the braking battery is charged through the charging control module, and the battery state of the braking battery in the charging judgment scenario is determined based on the working data and judgment conditions corresponding to the charging judgment scenario.

[0017] In a possible implementation manner of the first aspect, determining the actual available power of the brake battery based on the capacitance value and the remaining power includes:

[0018] Inputting the capacitance value and the remaining power into a preset filtering algorithm respectively to determine a remaining power correction value and a capacitance correction value;

[0019] The remaining power correction value and the capacitance correction value are input into the power function to determine the actual available power.

[0020] In a possible implementation manner of the first aspect, inputting the remaining power correction value and the capacitance correction value into a power function to determine the actual available power includes:

[0021] The actual available power is determined based on the remaining power correction value, the capacitance correction value, the remaining life correction value, the voltage correction value, the capacitance conversion coefficient, and the voltage conversion coefficient.

[0022] In a possible implementation manner of the first aspect, the state judgment scenario includes a charging judgment scenario; the judgment condition includes a charging failure condition and a charging restriction condition corresponding to the charging judgment scenario; the working data corresponding to the charging judgment scenario includes an input voltage value and an input current value of the brake battery;

[0023] The determining the battery state of the brake battery based on the working data and the judgment condition corresponding to the state judgment scenario includes:

[0024] If the input voltage value and / or the input current value meets the charging failure condition, determining that the brake battery is in a charging failure state;

[0025] If neither the input voltage value nor the input current value satisfies the charging failure condition, determining whether the input voltage value and / or the input current value satisfies the charging restriction condition;

[0026] If the input voltage value and / or the input current value meets the charge restriction condition, it is determined that the brake battery is in a charge restriction state.

[0027] In a possible implementation manner of the first aspect, the state judgment scenario includes a discharge judgment scenario; the judgment condition includes a discharge restriction condition and a discharge failure condition corresponding to the discharge judgment scenario; the working data corresponding to the discharge judgment scenario includes an output voltage value and an output current value of the brake battery;

[0028] The determining the battery state of the brake battery based on the working data and the judgment condition corresponding to the state judgment scenario includes:

[0029] If the output voltage value and / or the output current value meets the discharge failure condition, determining that the brake battery is in a discharge failure state;

[0030] If the output voltage value and the output current value do not satisfy the discharge failure condition, determining whether the output voltage value and / or the output current value satisfies the discharge restriction condition;

[0031] If the output voltage value and / or the output current value meets the discharge restriction condition, it is determined that the brake battery is in a discharge restriction state.

[0032] In a possible implementation of the first aspect, the state judgment scenario includes a capacity judgment scenario; the judgment condition includes a first number threshold and a second number threshold corresponding to the capacity judgment scenario; the working data corresponding to the capacity judgment scenario includes the remaining life of the brake battery;

[0033] The determining the battery state of the brake battery based on the working data and the judgment threshold corresponding to the state judgment scenario includes:

[0034] Based on the mapping relationship between the remaining life and the preset number of braking times, determining the maximum number of braking times corresponding to the remaining life;

[0035] If the maximum number of braking times is less than or equal to the first number threshold, determining that the brake battery is in a state of severely limited capacity;

[0036] If the maximum number of braking times is greater than the first number threshold, determining whether the maximum number of braking times is less than or equal to the second number threshold;

[0037] If the maximum number of braking times is less than or equal to the second number threshold, it is determined that the brake battery is in a capacity-limited state.

[0038] A second aspect of an embodiment of the present application provides a battery status determination device, which is applied to the brake system as described in the first aspect above, comprising:

[0039] A data acquisition module, used to acquire working data of the brake battery corresponding to a state judgment scenario; the state judgment scenario includes a power judgment scenario; the working data corresponding to the power judgment scenario includes a capacitance value of the brake battery and a remaining power of the brake battery;

[0040] A judgment module is used to determine the battery state of the brake battery based on the working data and a judgment threshold corresponding to the state judgment scenario.

[0041] A third aspect of an embodiment of the present application provides a vehicle-mounted terminal, which is used to execute the battery status determination method as described in the first aspect above.

[0042] The fourth aspect of an embodiment of the present application provides a vehicle-mounted terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the battery status determination method as described in the first aspect above is implemented.

[0043] A fifth aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery status determination method as described in the first aspect above is implemented.

[0044] A sixth aspect of the embodiments of the present application provides a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the battery status determination method described in the first aspect.

[0045] Compared with the prior art, the embodiments of the present application have the following advantages:

[0046] In the embodiment of the present application, the vehicle-mounted terminal can determine the battery state of the brake battery according to the working data and judgment threshold corresponding to the state judgment scenario; wherein the state judgment scenario of the brake battery may include the power judgment scenario; the working data corresponding to the power judgment scenario may include the capacitance value of the brake battery and the remaining power of the brake battery. That is, in different state judgment scenarios, the vehicle-mounted terminal can judge the battery state of the brake battery according to different working data; especially in the power judgment scenario, the vehicle-mounted terminal can judge the battery state in combination with the capacitance value and the remaining power, so the vehicle-mounted terminal can improve the judgment accuracy of the battery state. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 is a schematic diagram of a vehicle provided in an embodiment of the present application;

[0049] Figure 2 is a schematic diagram of a battery status determination method provided in an embodiment of the present application;

[0050] Figure 3 is a functional schematic diagram of an energy management unit provided in an embodiment of the present application;

[0051] Figure 4 It is a judgment flow diagram of a discharge judgment scenario provided in an embodiment of the present application;

[0052] Figure 5 is a schematic diagram of the capacity state of a brake battery provided in an embodiment of the present application;

[0053] Figure 6 is a schematic diagram of another method for determining a battery status provided in an embodiment of the present application;

[0054] Figure 7 It is a calculation diagram of a filtering algorithm provided in an embodiment of the present application;

[0055] Figure 8 It is a judgment flow diagram of a charging judgment scenario provided in an embodiment of the present application;

[0056] Fig. 9 is a schematic diagram of a battery status determination device provided in an embodiment of the present application;

[0057] Fig.10 It is a schematic diagram of a vehicle-mounted terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] In the following description, specific details such as specific system structures, technologies, etc. are proposed for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from hindering the description of the present application.

[0059] In recent years, with the development of vehicle electrification and intelligence, vehicle braking technology has also gradually developed towards wire-controlled brake system technology. The wire-controlled brake system can maximize the braking energy recovery rate and is more suitable for the development needs of future autonomous driving or domain control technology. The number of parts in the wire-controlled brake system is less than that of traditional hydraulic or pneumatic brake systems, which makes it easier to implement vehicle layout and can reduce the use and maintenance costs of OEMs and car owners.

[0060] Most of the existing brake systems are hydraulic brake systems or pneumatic brake systems. In hydraulic brake systems, either a vacuum booster pump or an electronic booster is used as a brake booster source. Pneumatic brake systems use air compressors and air reservoirs as brake booster sources to provide and store brake energy for the brake system. Both hydraulic and pneumatic energy storage devices are inferior to electric storage devices in terms of energy utilization and energy transmission time, and the energy storage devices and transmission devices of these two brake systems are complex in design, involve more parts, and have high use and maintenance costs. In contrast, since the brake booster source in the wire control brake system is an electric storage device, that is, the brake energy in the wire control brake system is electrical energy, the energy utilization rate and energy transmission rate of the wire control brake system are higher than those of the hydraulic brake system and the pneumatic brake system. In addition, compared with the vacuum booster pump or the air compressor, the main body of the electric storage device is a brake battery, so the design of the electric storage device in the wire control brake system is simpler and involves fewer parts; further, since the design of the electric energy transmission device is also simpler, the use and maintenance costs of the wire control brake system are lower.

[0061] In order to improve the energy supply safety of the power storage device and the accuracy of the fault alarm of the power storage device, the power storage device provided in the embodiment of the present application may be equipped with an energy management unit, which monitors the battery status of the power storage device (for example, actual available power, charge and discharge status, remaining battery life, etc.) in real time, charges the power storage device through the vehicle battery in time, and sends an alarm message to remind the driver when necessary.

[0062] The technical solution of the present application is described below through specific embodiments.

[0063] See also Figure 1 , shows a schematic diagram of a vehicle provided by an embodiment of the present application. Figure 1 As shown, the vehicle 1 may include a brake battery 11 and a vehicle-mounted terminal 12. The vehicle-mounted terminal 12 may collect working data of the brake battery 11 when the vehicle is started, and determine the battery state of the brake battery 11 according to the collected working data. For the specific method of determining the battery state by the vehicle-mounted terminal 12, please refer to the content of the method embodiment of this application.

[0064] See also Figure 2 , showing a schematic diagram of a battery status determination method provided in an embodiment of the present application. The method can be applied to a vehicle-mounted terminal. Among them, the above-mentioned vehicle-mounted terminal can be an electronic control unit (Electronic Control Unit, ECU), a microcontroller unit (Microcontroller Unit, MCU), a central processing unit (Central Processing Unit, CPU), an automobile engine control module (Automobile Engine Control Module, ECM) and other vehicle-mounted terminals. The above-mentioned battery status determination method can specifically include the following steps:

[0065] S201. Acquire working data of a brake battery corresponding to a state judgment scenario.

[0066] In this embodiment, in order to improve the safety of the braking energy supply of the braking system, an energy management unit can be run on the vehicle-mounted terminal in the power storage device of the braking system. The energy management unit can store multiple pre-set status judgment scenarios. The energy management unit on the vehicle-mounted terminal can monitor the battery status of the brake battery in real time. Among them, the brake battery can be a battery in the power storage device of the wire control brake system. The energy management unit can charge the brake battery according to the working data of the brake battery to improve the braking energy supply stability of the brake battery. The energy management unit on the vehicle-mounted terminal can also send prompt information in time to inform the driver of the battery status of the brake battery when it monitors that the battery status of the brake battery cannot meet the specified braking requirements.

[0067] Specifically, the state judgment scenarios pre-stored in the energy management unit may include but are not limited to power judgment scenarios, charging judgment scenarios, discharging judgment scenarios, capacity judgment scenarios, etc. Among them, the judgment period corresponding to a certain state judgment scenario can be used to indicate the interval time for the vehicle-mounted terminal to perform periodic battery status detection on the brake battery according to the state judgment scenario. The judgment period corresponding to each state judgment scenario can be set by R&D personnel according to the importance of each state judgment scenario. For any state judgment scenario, when the vehicle-mounted terminal determines that the current moment satisfies the judgment period corresponding to the state judgment scenario, the vehicle-mounted terminal obtains the working data corresponding to the state judgment scenario to monitor the battery status of the power storage device in real time.

[0068] Among them, the working data of the brake battery may include but is not limited to the output voltage value, output current value, capacitance value, input voltage value, input current value, remaining power (State Of Charge, SOC), remaining life (state of health, SOH) and other data of the brake battery. Specifically, in the power judgment scenario, the vehicle-mounted terminal can judge the battery status of the brake battery according to the capacitance value and remaining power of the brake battery; in the charging judgment scenario, the vehicle-mounted terminal can judge the battery status of the brake battery according to the input voltage value and input current value of the brake battery; in the discharge judgment scenario, the vehicle-mounted terminal can judge the battery status of the brake battery according to the output voltage value and output current value of the brake battery; in the capacity judgment scenario, the vehicle-mounted terminal can judge the battery status of the brake battery according to the remaining life of the brake battery.

[0069] S202: Determine the battery status of the brake battery based on the working data and the judgment threshold corresponding to the status judgment scenario.

[0070] In this embodiment, after acquiring the working data corresponding to the status judgment scenario, the vehicle-mounted terminal can determine the battery status of the brake battery according to the working data and judgment threshold corresponding to the status judgment scenario, and perform corresponding operations according to the battery status of the brake battery, so as to promptly inform the driver of the battery status of the brake battery and / or maintain the braking performance of the brake battery.

[0071] Through the method provided in this embodiment, the vehicle-mounted terminal can determine the battery status of the brake battery according to the working data and judgment threshold corresponding to the status judgment scenario. Furthermore, the working data of the brake battery may include but is not limited to the output voltage value, output current value, capacitance value, input voltage value, input current value, remaining power, remaining life and other data of the brake battery. The status judgment scenario may include but is not limited to the judgment scenario such as power judgment scenario, charging judgment scenario, discharging judgment scenario, and capacity judgment scenario. Therefore, the method provided in this embodiment enables the vehicle-mounted terminal to determine the battery status of the brake battery through multiple different judgment scenarios, thereby improving the judgment accuracy of the battery status.

[0072] See also Figure 3 , shows a functional schematic diagram of an energy management unit provided in an embodiment of the present application. Figure 3 As shown in (a), the energy management unit may include a signal acquisition module, a signal processing module and a state judgment module. Among them, the signal acquisition module can be used to collect working data corresponding to the brake battery, such as the output voltage value, output current value, capacitance value, input voltage value, input current value, remaining power, remaining life, etc. of the brake battery. After collecting the working data of the brake battery, the signal acquisition module can input the working data into the signal processing module. The signal processing module may include a filtering algorithm and a power function. The signal processing module may correct the collected working data through the filtering algorithm, and calculate the corrected working data through the power function to determine the actual available power of the brake battery. The signal processing module may input the corrected working data and the actual available power of the brake battery into the state judgment module to determine the battery state of the brake battery.

[0073] like Figure 3 As shown in (b), the signal acquisition module in the energy management unit can also collect signals transmitted by each brake module in the brake system, such as the signal transmitted by the parking switch and the signal transmitted by the brake pedal. After receiving the signal transmitted by the brake module, the energy management unit can control the brake battery to output braking energy to each brake module in the brake system according to the signal transmitted by the brake module to achieve the braking function.

[0074] In one possible implementation, the status judgment scenario in the vehicle terminal may include a discharge judgment scenario of the brake battery. Among them, the working data corresponding to the discharge judgment scenario may include but is not limited to the output voltage value and output current value of the brake battery. It should be noted that when there are multiple brake batteries in the brake system, the output end of each brake battery may be installed with a voltage sensor and a current sensor for respectively collecting the output voltage value and output current value of each brake battery. The vehicle terminal can perform discharge status judgment on each brake battery separately. In the discharge judgment scenario, the vehicle terminal can obtain the output voltage value and output current value of the brake battery according to the judgment period corresponding to the discharge judgment scenario, and determine the discharge status of the brake battery in combination with the discharge failure condition and the discharge restriction condition corresponding to the discharge judgment scenario.

[0075] See also Figure 4 , shows a schematic diagram of a judgment process of a discharge judgment scenario provided by an embodiment of the present application. Figure 4 As shown, after obtaining the output voltage value and the output current value, the vehicle-mounted terminal can first determine whether the output voltage value and the output current value meet the discharge failure condition. Among them, the discharge failure condition refers to the battery status judgment condition of whether the brake battery can discharge normally. If the vehicle-mounted terminal determines that the output voltage value or the output current value meets the discharge failure condition, the vehicle-mounted terminal can determine that the current battery status of the brake battery is a discharge failure state. At this time, the vehicle-mounted terminal can generate a first prompt message and display the first prompt message through the vehicle-mounted display device. Among them, the first prompt message can be used to inform the user that the brake battery is in a discharge failure state and cannot be discharged normally.

[0076] Specifically, after the vehicle-mounted terminal collects the output voltage value of the brake battery in the discharge state, it can determine whether a short circuit or an open circuit occurs at the output end of the brake battery according to the output current value. If the vehicle-mounted terminal determines that a short circuit or an open circuit occurs at the output end of the brake battery according to the output current value, the vehicle-mounted terminal can determine that the output current value meets the discharge failure condition. If the vehicle-mounted terminal determines that there is no short circuit or open circuit at the output end of the brake battery according to the output current value, the vehicle-mounted terminal can further determine whether the output current value is greater than the first current threshold. Among them, the first current threshold is a current judgment parameter for whether the brake battery can be discharged normally. If the vehicle-mounted terminal determines that the current value is less than or equal to the first current threshold, the vehicle-mounted terminal can determine that the output current of the current brake battery does not meet the discharge failure condition. If the vehicle-mounted terminal determines that the current value is greater than the first current threshold, the vehicle-mounted terminal can determine that the output current value meets the discharge failure condition. It should be noted that the method provided in this embodiment is not used to limit the order in which the vehicle-mounted terminal judges the output voltage value and the output current value for battery discharge failure.

[0077] In one possible implementation, Figure 4 As shown, if the vehicle-mounted terminal determines that both the output voltage value and the output current value do not meet the discharge failure condition, the vehicle-mounted terminal can further determine whether the output voltage value and the output current value meet the discharge restricted condition. Among them, the discharge restricted condition refers to the battery status judgment condition of whether the discharge performance of the brake battery is reduced. If the vehicle-mounted terminal determines that the output voltage value and / or the output current value meet the discharge restricted condition, the vehicle-mounted terminal can determine that the brake battery is in a discharge restricted state. The vehicle-mounted terminal can generate a second prompt message and display the second prompt message through the vehicle-mounted display device. Among them, the second prompt message can be used to inform the user that the brake battery is in a discharge restricted state and cannot be discharged normally. If the vehicle-mounted terminal determines that both the output voltage value and the output current value do not meet the discharge restricted condition, the vehicle-mounted terminal can determine that the brake battery is in a normal discharge state.

[0078] Specifically, when the vehicle-mounted terminal determines whether the brake battery meets the discharge restriction condition, for the output voltage value, the vehicle-mounted terminal can determine whether the current output voltage value of the brake battery is within the voltage output range. Among them, the voltage range is a range composed of the output voltage lower limit value and the output voltage upper limit value. The output voltage lower limit value is the minimum output voltage value when the discharge performance of the brake battery is normal. The output voltage upper limit value is the maximum output voltage value when the discharge performance of the brake battery is normal. If the vehicle-mounted terminal determines that the current output voltage value of the brake battery is outside the voltage output range, the vehicle-mounted terminal can determine that the current output voltage value of the brake battery meets the discharge restriction condition. If the vehicle-mounted terminal determines that the current output voltage value of the brake battery is within the voltage output range, the vehicle-mounted terminal can determine that the current output voltage value of the brake battery does not meet the discharge restriction condition.

[0079] For the output current value, the on-board terminal can determine whether the current output current value of the brake battery is less than the output current threshold. The output current threshold is a current judgment parameter for whether the discharge performance of the brake battery has decreased. If the on-board terminal determines that the current output current value of the brake battery is less than the output current threshold, the on-board terminal can determine that the current output current value of the brake battery meets the discharge restriction condition. If the on-board terminal determines that the current output current value of the brake battery is greater than or equal to the output current threshold, the on-board terminal can determine that the current output current value of the brake battery does not meet the discharge restriction condition. It should be noted that the method provided in this embodiment is not used to limit the order in which the on-board terminal makes battery discharge restriction judgments on the output voltage value and the output current value.

[0080] Through the method provided in this embodiment, the vehicle-mounted terminal can determine the discharge status of the brake battery based on the output voltage value and the output current value of the brake battery, and when the brake battery is in a discharge failure state or a discharge limited state, the driver is promptly informed of the brake battery discharge limitation or brake battery discharge failure through prompt information.

[0081] In a possible implementation, the state judgment scenario of the brake battery may also include a capacity judgment scenario, and the judgment condition may include a first number threshold and a second number threshold corresponding to the capacity judgment scenario. Among them, the working data of the brake battery in the capacity judgment scenario may include the remaining life of the brake battery. It should be noted that when there are multiple brake batteries in the brake system, each brake battery may be installed with a remaining life sensor for collecting the remaining life of each brake battery respectively. The vehicle-mounted terminal can perform capacity judgment on each brake battery respectively. In the capacity judgment scenario, the vehicle-mounted terminal can obtain the remaining life of the brake battery according to the judgment cycle corresponding to the capacity judgment scenario. For any brake battery, the vehicle-mounted terminal can determine the maximum number of braking times corresponding to the brake battery according to the mapping relationship between the remaining life corresponding to the brake battery and the number of braking times pre-set by the R&D personnel. Among them, the maximum number of braking times can be used to indicate that when the brake battery is fully charged, the electrical energy in the brake battery can meet the number of times the brake system completes the braking operation.

[0082] After obtaining the maximum number of braking times of the brake battery, the on-board terminal can first determine whether the maximum number of braking times is less than or equal to the first number threshold. If the on-board terminal determines that the maximum number of braking times is less than or equal to the first number threshold, the on-board terminal can determine that the brake battery is in a state of severe capacity limitation. Among them, the first number threshold can be specified in industry regulations related to automobile braking performance, which is the minimum number of braking times that the braking performance of the vehicle's braking system needs to meet in a single trip, that is, at this time, the power of the brake battery in a fully charged state cannot meet the minimum number of braking times required in a single trip. At this time, the on-board terminal can generate a third prompt message and provide the on-board display device to display the third prompt message to inform the user that the brake battery is in a state of severe capacity limitation, and the trip needs to be stopped as soon as possible and the brake battery needs to be repaired.

[0083] If the vehicle-mounted terminal determines that the maximum number of braking times is greater than the first number threshold, the vehicle-mounted terminal may further determine whether the maximum number of braking times is less than or equal to the second number threshold. Among them, the first number threshold may be the optimal number of braking times that the braking performance of the vehicle's braking system needs to meet in a single trip as specified in the relevant clauses. If the vehicle-mounted terminal determines that the maximum number of braking times is less than or equal to the second number threshold, the vehicle-mounted terminal may determine that the brake battery is in a capacity-limited state, that is, at this time, the power of the brake battery in a fully charged state cannot meet the optimal number of braking times required in a single trip. At this time, the vehicle-mounted terminal may generate a fourth prompt message, and provide the vehicle-mounted display device to display the fourth prompt message, so as to inform the user that the brake battery is in a capacity-limited state and the brake battery needs to be repaired. If the vehicle-mounted terminal determines that the maximum number of braking times is greater than the second number threshold, the vehicle-mounted terminal may determine that the brake battery is currently in a normal capacity state, and the vehicle-mounted terminal may not generate a prompt message.

[0084] See also Figure 5 , shows a schematic diagram of the capacity state of a brake battery provided in an embodiment of the present application. Figure 5 As shown, during use, as the brake battery ages, the remaining life of the brake battery will also decrease. Since the remaining life of the brake battery can be used to represent the ratio between the current actual capacity of the brake battery and the initial rated capacity. When the remaining life of the battery is reduced to a certain value, that is, the current actual capacity of the brake battery is small, at this time, the maximum number of braking times of the brake battery will also decrease accordingly. Therefore, the method provided in this embodiment enables the on-board terminal to continuously monitor the maximum number of braking times of the brake battery according to the remaining life of the brake battery, and when the maximum number of braking times does not meet the driving braking requirements, promptly inform the user to maintain the brake battery in the brake system, such as replacing the brake battery. Therefore, the method provided in this embodiment can improve the braking performance of the brake system, thereby improving the driving safety of the user.

[0085] Figure 6 FIG. 2 shows a specific implementation flow chart of a battery status determination method S202 provided in the second embodiment of the present application. Figure 6 , compared to Figure 2 In the embodiment, the method for determining the battery status provided in this embodiment includes S202: S601 to S603, which are described in detail as follows:

[0086] S601 : Determine the actual available power of the brake battery based on the capacitance value and the remaining power.

[0087] In this embodiment, the state judgment scenario in the vehicle terminal may include a power judgment scenario. Accordingly, the judgment threshold used by the vehicle terminal for state judgment may include a charging threshold and a braking demand value corresponding to the power judgment scenario. Among them, the braking demand value may be less than the charging threshold. When the vehicle terminal determines that the current moment satisfies the judgment cycle corresponding to the power judgment scenario, the vehicle terminal may obtain the working data corresponding to the power judgment scenario, that is, the vehicle terminal may obtain the output voltage value, capacitance value, remaining power and remaining life of the brake battery. The vehicle terminal can calculate the actual available power of the brake battery based on the output voltage value, capacitance value, remaining power and remaining life of the brake battery.

[0088] In one possible implementation, when the vehicle-mounted terminal calculates the actual available power of the brake battery, it can first input the obtained output voltage value, capacitance value, remaining power and remaining life into the filtering algorithm pre-set by the R&D personnel, so as to correct the output voltage value, capacitance value, remaining power and remaining life through the filtering algorithm to determine the remaining power correction value, remaining life correction value, voltage correction value and capacitance correction value. After obtaining the remaining power correction value, remaining life correction value, voltage correction value and capacitance correction value, the vehicle-mounted terminal can input the remaining power correction value, remaining life correction value, voltage correction value and capacitance correction value into the power function pre-set by the R&D personnel to calculate the actual available power of the brake battery through the power function. Specifically, the power function can be as follows:

[0089]

[0090] Among them, P can be used to represent the actual available power of the brake battery. K Can be used to indicate the capacitance correction value of the brake battery. V K Can be used to indicate the voltage correction value of the brake battery. SOC K Can be used to indicate the remaining power correction value of the brake battery. K Can be used to indicate the remaining life correction value of the brake battery.

[0091] In one possible implementation, see Figure 7 , shows a calculation schematic diagram of a filtering algorithm provided by an embodiment of the present application. Figure 7 As shown, before the vehicle-mounted terminal corrects the working data, if the current working data is the working data collected by the vehicle-mounted terminal in the first collection cycle, the vehicle-mounted terminal can determine the data estimate value corresponding to the next collection cycle based on the currently collected working data, the covariance pre-set by the R&D personnel, and the initial estimate value, so as to correct the working data of the next collection cycle.

[0092] For the working data collected in the subsequent collection cycle, the vehicle terminal can input the working data collected in the current collection cycle and the data estimation value generated in the last collection cycle into the Kalman gain function to calculate the gain coefficient for the current collection cycle. After determining the gain coefficient, the vehicle terminal can calculate the working data correction value according to the gain coefficient, the working data and the data estimation value. The vehicle terminal can update the covariance according to the gain coefficient, the data estimation value and the working data correction value, and calculate the data estimation value corresponding to the next collection cycle according to the updated covariance, so as to correct the working data of the next collection cycle. Specifically, when the working data is the output voltage value, the data estimation value can be the voltage estimation value, and the working data correction value can be the voltage correction value. When the working data is the capacitance value, the data estimation value can be the capacitance estimation value, and the working data correction value can be the capacitance correction value. When the working data is the remaining power, the data estimation value can be the remaining power estimation value, and the working data correction value can be the remaining power correction value. When the working data is the remaining life, the data estimation value can be the remaining life estimation value, and the working data correction value can be the remaining life correction value.

[0093] During the use of the brake battery, the output voltage value, capacitance value, remaining power and remaining life of the brake battery will change with the use environment and use conditions of the brake battery. Furthermore, since the sensor also has certain measurement errors when collecting the output voltage value and capacitance value. Therefore, if the vehicle-mounted terminal directly calculates the actual available power of the brake battery based on the collected output voltage value, capacitance value, remaining power and remaining life, it is easy to cause the calculation accuracy of the actual available power to be low, thereby affecting the vehicle-mounted terminal's judgment accuracy of the battery status of the brake battery.

[0094] In this embodiment, since the vehicle terminal can correct the output voltage value, capacitance value, remaining power and remaining life of the brake battery through the Kalman filter algorithm, the method provided in this embodiment can improve the calculation accuracy of the actual available power, thereby enabling the vehicle terminal to more accurately estimate and evaluate the battery status of the brake battery, thereby improving the operational safety of the brake system.

[0095] S602: If the actual available power is less than or equal to the braking demand value corresponding to the vehicle model information, it is determined that the brake battery is in an unavailable state.

[0096] In this embodiment, after determining the actual available power of the brake battery, the vehicle terminal can determine the battery state of the brake battery according to the actual available power, the braking demand value and the charging threshold. Specifically, the vehicle terminal can first query the demand value mapping relationship pre-set by the R&D personnel according to the vehicle model information corresponding to the vehicle to determine the braking demand value corresponding to the current vehicle.

[0097] Among them, the braking demand value corresponding to a vehicle model can be used to indicate that when the vehicle model is fully loaded, the braking energy output by the storage device in the braking system is required to perform a braking operation through the braking system. The on-board terminal can first determine whether the actual available power of the brake battery is less than or equal to the braking demand value corresponding to the vehicle model information. If the on-board terminal determines that the actual available power of the brake battery is less than or equal to the braking demand value, the vehicle may not be able to complete a braking operation at present. At this time, the on-board terminal can determine that the brake battery of the braking system is in an unavailable state. The on-board terminal can generate a fifth prompt message and display the fifth prompt message through the on-board display device to inform the driver that the brake battery of the current vehicle is in an unavailable state.

[0098] In a possible implementation, when the vehicle terminal determines that the current brake battery of the vehicle is in an unusable state, the vehicle terminal can also obtain the current driving speed of the vehicle, and control the braking system of the vehicle to perform an auxiliary parking operation corresponding to the driving speed according to the driving speed to improve the safety of the vehicle. For example, the vehicle terminal can play an auxiliary braking video through the vehicle display device to teach the driver to stop the vehicle in a safe way.

[0099] S603: If the actual available power is greater than the braking demand value and the actual available power is less than the charging threshold, it is determined that the brake battery is in a state to be charged.

[0100] In this embodiment, if the vehicle terminal determines that the actual available power of the brake battery is greater than the braking demand value corresponding to the vehicle model information, the vehicle terminal can further determine whether the actual available power of the brake battery is less than the charging threshold preset by the R&D personnel. When the vehicle terminal determines that the actual available power is greater than the braking demand value, and the actual available power is less than the charging threshold, the vehicle terminal can determine that the brake battery is currently in a state to be charged, that is, the current working data of the brake battery meets the charging conditions. At this time, the vehicle terminal can initiate a charging instruction to the charging control module in the braking system to obtain electrical energy from the vehicle battery through the charging control module.

[0101] If the vehicle terminal determines that the actual available power is greater than the braking demand value, and the actual available power is greater than or equal to the charging threshold, the vehicle terminal can determine that the brake battery is currently in a sufficient power state. At this time, the vehicle terminal may not generate the first prompt information and does not perform a charging operation on the brake battery.

[0102] In one possible implementation, after initiating a charging instruction to the charging control module, the on-board terminal can determine that the current scenario satisfies the charging judgment scenario of the brake battery. Among them, the working data corresponding to the charging judgment scenario may include but is not limited to the input voltage value, input current value and charging time of the brake battery. It should be noted that when there are multiple brake batteries in the braking system, a voltage sensor and a current sensor may be installed at the input end of each brake battery to respectively collect the input voltage value and input current value of each brake battery. When each brake battery is charged, the on-board terminal can judge the charging status of each brake battery in each charge. In the charging judgment scenario, the on-board terminal can obtain the input voltage value, input current value and charging time of the brake battery according to the judgment cycle corresponding to the charging judgment scenario, and determine the charging status of the brake battery in combination with the charging failure condition and the charging restriction condition corresponding to the charging judgment scenario.

[0103] As shown below, a calculation formula of actual available power in the prior art is shown.

[0104]

[0105] Wherein, P may represent the actual available power of the brake battery, C may represent the capacitance value of the brake battery, and V may represent the voltage value of the brake battery.

[0106] As can be seen from the above formula, in the prior art, researchers often calculate the actual available power of the brake battery by using the capacitance value and the voltage value. However, in addition to being affected by the voltage value and the capacitance value, the actual available power of the brake battery will also be affected by other factors in the brake battery. Therefore, the calculation accuracy of the existing calculation formula for the actual available power is relatively high. The method provided in the embodiment of the present application enables the vehicle-mounted terminal to calculate the actual available power based on the output voltage value and the capacitance value, and further combines the remaining power and the remaining life of the brake battery. Therefore, the method provided in this embodiment can improve the calculation accuracy of the actual available power.

[0107] See also Figure 8 , shows a schematic diagram of a judgment process of a charging judgment scenario provided by an embodiment of the present application. Figure 8As shown, after obtaining the output voltage value and the input current value, the vehicle-mounted terminal can first determine whether the output voltage value and the input current value meet the charging failure condition. Among them, the charging failure condition refers to the battery status judgment condition of whether the brake battery can be charged normally. If the vehicle-mounted terminal determines that the output voltage value or the input current value meets the charging failure condition, the vehicle-mounted terminal can determine that the current battery status of the brake battery is a charging failure state. At this time, the vehicle-mounted terminal can generate a sixth prompt message and display the sixth prompt message through the vehicle-mounted display device. Among them, the sixth prompt message can be used to inform the user that the brake battery is in a charging failure state and cannot be charged normally.

[0108] Specifically, after the vehicle-mounted terminal collects the input voltage value of the brake battery under charging state, it can first calculate the voltage difference between the input voltage value and the ground voltage value, and determine whether the voltage difference is less than the voltage difference threshold. The voltage difference threshold is a voltage judgment parameter for whether the brake battery can be charged normally. If the vehicle-mounted terminal determines that the voltage difference is less than the voltage difference threshold, the vehicle-mounted terminal can determine that the input voltage value of the brake battery meets the charging failure condition. If the vehicle-mounted terminal determines that the voltage difference is greater than or equal to the voltage difference threshold, the vehicle-mounted terminal can determine that the input voltage value of the brake battery does not meet the charging failure condition.

[0109] The vehicle-mounted terminal can determine whether a short circuit or an open circuit occurs at the input end of the brake battery according to the input current value. If the vehicle-mounted terminal determines that a short circuit or an open circuit occurs at the input end of the brake battery according to the input current value, the vehicle-mounted terminal can determine that the input current value meets the discharge failure condition. If the vehicle-mounted terminal determines that there is no short circuit or open circuit at the input end of the brake battery according to the input current value, the vehicle-mounted terminal can further determine whether the input current value is greater than the second current threshold. Among them, the first current threshold is a current judgment parameter for whether the brake battery can be charged normally. If the vehicle-mounted terminal determines that the current value is less than or equal to the second current threshold, the vehicle-mounted terminal can determine that the current input current of the brake battery meets the charging failure condition. If the vehicle-mounted terminal determines that the current value is greater than the second current threshold, the vehicle-mounted terminal can determine that the input current value does not meet the charging failure condition. It should be noted that the method provided in this embodiment is not used to limit the order in which the vehicle-mounted terminal judges the battery charging failure on the input voltage value and the input current value.

[0110] In one possible implementation, Figure 8As shown, if the vehicle-mounted terminal determines that both the input voltage value and the input current value do not meet the charging failure condition, the vehicle-mounted terminal can further determine whether at least one of the input voltage value, the input current value and the charging time meets the charging restricted condition. Among them, the charging restricted condition refers to the battery status judgment condition of whether the charging performance of the brake battery is reduced. If the vehicle-mounted terminal determines that any one or more of the output voltage value, the input current value and the charging time meet the charging restricted condition, the vehicle-mounted terminal can determine that the brake battery is in a charging restricted state. The vehicle-mounted terminal can generate a seventh prompt message and display the seventh prompt message through the vehicle-mounted display device. Among them, the seventh prompt message can be used to inform the user that the brake battery is in a charging restricted state and cannot be charged normally. If the vehicle-mounted terminal determines that the input voltage value, the input current value and the charging time do not meet the charging restricted condition, the vehicle-mounted terminal can determine that the brake battery is in a normal charging state.

[0111] Specifically, when the on-board terminal determines whether the brake battery meets the restricted charging condition, for the output voltage value, the on-board terminal can determine whether the current input voltage value of the brake battery is within the voltage input range. Among them, the voltage range is a range composed of the lower limit value of the input voltage and the upper limit value of the input voltage. The lower limit value of the input voltage is the minimum input voltage value when the charging performance of the brake battery is normal. The upper limit value of the input voltage is the maximum input voltage value when the charging performance of the brake battery is normal. If the on-board terminal determines that the current input voltage value of the brake battery is outside the voltage input range, the on-board terminal can determine that the current input voltage value of the brake battery meets the restricted charging condition. If the on-board terminal determines that the current input voltage value of the brake battery is within the voltage input range, the on-board terminal can determine that the current input voltage value of the brake battery does not meet the restricted charging condition.

[0112] For the input current value, the vehicle-mounted terminal can determine whether the current input current value of the brake battery is less than the input current threshold. Among them, the input current threshold is a current judgment parameter for whether the charging performance of the brake battery is reduced. If the vehicle-mounted terminal determines that the current input current value of the brake battery is less than the input current threshold, the vehicle-mounted terminal can determine that the current input current value of the brake battery meets the charging restriction condition. If the vehicle-mounted terminal determines that the current input current value of the brake battery is greater than or equal to the input current threshold, the vehicle-mounted terminal can determine that the current input current value of the brake battery does not meet the charging restriction condition.

[0113] Regarding the charging time, the on-board terminal can determine whether the current charging time of the brake battery is greater than the time threshold. Among them, the time threshold is a charging time judgment parameter for whether the charging performance of the brake battery is reduced. If the on-board terminal determines that the current charging time of the brake battery is greater than the time threshold, the on-board terminal can determine that the current charging time of the brake battery meets the charging restriction condition. If the on-board terminal determines that the current charging time of the brake battery is less than or equal to the time threshold, the on-board terminal can determine that the current charging time of the brake battery does not meet the charging restriction condition. It should be noted that the method provided in this embodiment is not used to limit the order in which the on-board terminal makes battery charging restriction judgments on the charging time, input voltage value, and input current value.

[0114] According to the method provided in this embodiment, the vehicle terminal can determine the charging state of the brake battery according to the input voltage value and input current value of the brake battery, and inform the driver of the battery state of the brake battery through prompt information when the brake battery is in a charging failure state or a charging limited state. Therefore, the method provided in this embodiment enables the driver to know the fault condition of the brake battery in time when the brake battery has a charging fault, and then can repair the brake battery in a targeted manner. Therefore, the method provided in this embodiment improves the effectiveness of brake battery charging.

[0115] It should be noted that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0116] Reference Fig. 9 , shows a schematic diagram of a battery status determination device provided in an embodiment of the present application, which may specifically include a data acquisition module 901 and a determination module 902, wherein:

[0117] The data acquisition module 901 is used to acquire the working data of the brake battery corresponding to the state judgment scenario; the working data corresponding to the power judgment scenario includes the capacitance value of the brake battery and the remaining power of the brake battery;

[0118] The judgment module 902 is used to determine the battery state of the brake battery based on the working data and the judgment threshold corresponding to the state judgment scenario.

[0119] The judgment module can also be used to control the braking system of the vehicle to perform an assisted parking operation based on the current driving speed of the vehicle, and display a fifth prompt message; the fifth prompt message is used to inform the driver that the brake battery of the current vehicle is in an unusable state; initiate a charging instruction to the charging control module in the braking system, charge the brake battery through the charging control module, and determine the battery state of the brake battery in the charging judgment scenario based on the working data and judgment conditions corresponding to the charging judgment scenario.

[0120] The judgment module can also be used to input the capacitance value and the remaining power into a preset filtering algorithm respectively to determine the remaining power correction value and the capacitance correction value; input the remaining power correction value and the capacitance correction value into a power function to determine the actual available power.

[0121] The judgment module can also be used to determine the actual available power based on the remaining power correction value, the capacitance correction value, the remaining life correction value, the voltage correction value, the capacitance conversion coefficient and the voltage conversion coefficient.

[0122] The judgment module can also be used to determine that the brake battery is in a charging failure state if the input voltage value and / or the input current value meets the charging failure condition; if the input voltage value and the input current value do not meet the charging failure condition, determine whether the input voltage value and / or the input current value meet the charging restriction condition; if the input voltage value and / or the input current value meet the charging restriction condition, determine that the brake battery is in a charging restriction state.

[0123] The judgment module can also be used to determine that the brake battery is in a discharge failure state if the output voltage value and / or the output current value meet the discharge failure condition; if the output voltage value and the output current value do not meet the discharge failure condition, then determine whether the output voltage value and / or the output current value meet the discharge restriction condition; if the output voltage value and / or the output current value meet the discharge restriction condition, then determine that the brake battery is in a discharge restriction state.

[0124] The judgment module can also be used to determine the maximum number of braking times corresponding to the remaining life based on the mapping relationship between the remaining life and the preset number of braking times; if the maximum number of braking times is less than or equal to the first number threshold, it is determined that the brake battery is in a state of severe capacity limitation; if the maximum number of braking times is greater than the first number threshold, it is determined whether the maximum number of braking times is less than or equal to the second number threshold; if the maximum number of braking times is less than or equal to the second number threshold, it is determined that the brake battery is in a state of capacity limitation.

[0125] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment part.

[0126] Reference Fig.10 , shows a schematic diagram of a vehicle-mounted terminal provided by an embodiment of the present application. Fig.10 As shown, the vehicle terminal 1000 in the embodiment of the present application includes: a processor 1010, a memory 1010, and a computer program 1021 stored in the memory 1010 and executable on the processor 1010. When the processor 1010 executes the computer program 1021, the steps in each embodiment of the above-mentioned battery status determination method are implemented, such as Fig.10 Alternatively, when the processor 1010 executes the computer program 1021, the functions of each module / unit in the above-mentioned device embodiments are realized, for example, Fig. 9 Functions of modules 901 to 902 are shown.

[0127] Exemplarily, the computer program 1021 may be divided into one or more modules / units, which are stored in the memory 1010 and executed by the processor 1010 to complete the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which may be used to describe the execution process of the computer program 1021 in the vehicle-mounted terminal 1000. For example, the computer program 1021 may be divided into a data acquisition module and a judgment module, and the specific functions of each module are as follows:

[0128] A data acquisition module, used to acquire the working data of the brake battery corresponding to the state judgment scenario; the working data corresponding to the power judgment scenario includes the capacitance value of the brake battery and the remaining power of the brake battery;

[0129] A judgment module is used to determine the battery state of the brake battery based on the working data and a judgment threshold corresponding to the state judgment scenario.

[0130] The vehicle terminal 1000 may include, but is not limited to, a processor 1010 and a memory 1010. Those skilled in the art will appreciate that Fig.10 It is only an example of the vehicle-mounted terminal 1000 and does not constitute a limitation of the vehicle-mounted terminal 1000. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the vehicle-mounted terminal 1000 may also include input and output devices, network access devices, buses, etc.

[0131] The processor 1010 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0132] The memory 1010 may be an internal storage unit of the vehicle-mounted terminal 1000, such as a hard disk or memory of the vehicle-mounted terminal 1000. The memory 1010 may also be an external storage device of the vehicle-mounted terminal 1000, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the vehicle-mounted terminal 1000. Further, the memory 1010 may also include both an internal storage unit of the vehicle-mounted terminal 1000 and an external storage device. The memory 1010 is used to store the computer program 1021 and other programs and data required by the vehicle-mounted terminal 1000. The memory 1010 may also be used to temporarily store data that has been output or is to be output.

[0133] An embodiment of the present application also discloses a vehicle-mounted terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the battery status determination method described in the aforementioned embodiments is implemented.

[0134] The embodiment of the present application further discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the battery status determination method as described in the above-mentioned embodiments is implemented.

[0135] The embodiment of the present application further discloses a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the battery status determination method described in the above-mentioned embodiments.

[0136] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above-mentioned embodiments, a person skilled in the art should understand that the technical solutions described in the above-mentioned embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for determining a battery status, characterized in that: include: Obtaining the working data of the brake battery corresponding to the state judgment scenario; The state judgment scenario includes a power judgment scenario; the working data corresponding to the power judgment scenario includes the capacitance value of the brake battery and the remaining power of the brake battery; The battery state of the brake battery is determined based on the working data and the judgment condition corresponding to the state judgment scenario.

2. The method according to claim 1, characterized in that The judgment condition includes a charging threshold and a braking requirement value corresponding to the power judgment scenario; the braking requirement value is less than the charging threshold; The determining the battery state of the brake battery based on the working data and the judgment condition corresponding to the state judgment scenario includes: determining an actual available power of the brake battery based on the capacitance value and the remaining power; If the actual available power is less than or equal to the braking demand value corresponding to the vehicle model information, determining that the brake battery is in an unavailable state; If the actual available power is greater than the braking demand value and the actual available power is less than the charging threshold, it is determined that the brake battery is in a state to be charged.

3. The method according to claim 2, characterized in that After determining that the brake battery is in an unusable state, the method further comprises: Based on the current driving speed of the vehicle, controlling the braking system of the vehicle to perform an assisted parking operation, and displaying a fifth prompt message; the fifth prompt message is used to inform the driver that the brake battery of the current vehicle is in an unusable state; After determining that the brake battery is in a state to be charged, the method further comprises: A charging instruction is initiated to a charging control module in the braking system, the braking battery is charged through the charging control module, and the battery state of the braking battery in the charging judgment scenario is determined based on the working data and judgment conditions corresponding to the charging judgment scenario.

4. The method according to claim 2, characterized in that: The determining the actual available power of the brake battery based on the capacitance value and the remaining power includes: Inputting the capacitance value and the remaining power into a preset filtering algorithm respectively to determine a remaining power correction value and a capacitance correction value; The remaining power correction value and the capacitance correction value are input into the power function to determine the actual available power.

5. The method according to claim 4, characterized in that The inputting the remaining power correction value and the capacitance correction value into the power function to determine the actual available power includes: The actual available power is determined based on the remaining power correction value, the capacitance correction value, the remaining life correction value, the voltage correction value, the capacitance conversion coefficient, and the voltage conversion coefficient.

6. The method according to any one of claims 1 to 5, characterized in that: The state judgment scenario includes a charging judgment scenario; the judgment condition includes a charging failure condition and a charging restriction condition corresponding to the charging judgment scenario; the working data corresponding to the charging judgment scenario includes an input voltage value and an input current value of the brake battery; The determining the battery state of the brake battery based on the working data and the judgment condition corresponding to the state judgment scenario includes: If the input voltage value and / or the input current value meets the charging failure condition, determining that the brake battery is in a charging failure state; If neither the input voltage value nor the input current value satisfies the charging failure condition, determining whether the input voltage value and / or the input current value satisfies the charging restriction condition; If the input voltage value and / or the input current value meets the charge restriction condition, it is determined that the brake battery is in a charge restriction state.

7. The method according to any one of claims 1 to 5, characterized in that: The state judgment scenario includes a discharge judgment scenario; the judgment condition includes a discharge restriction condition and a discharge failure condition corresponding to the discharge judgment scenario; the working data corresponding to the discharge judgment scenario includes an output voltage value and an output current value of the brake battery; The determining the battery state of the brake battery based on the working data and the judgment condition corresponding to the state judgment scenario includes: If the output voltage value and / or the output current value meets the discharge failure condition, determining that the brake battery is in a discharge failure state; If the output voltage value and the output current value do not satisfy the discharge failure condition, determining whether the output voltage value and / or the output current value satisfies the discharge restriction condition; If the output voltage value and / or the output current value meets the discharge restriction condition, it is determined that the brake battery is in a discharge restriction state.

8. The method according to any one of claims 1 to 5, characterized in that: The state judgment scenario includes a capacity judgment scenario; the judgment condition includes a first number threshold and a second number threshold corresponding to the capacity judgment scenario; the working data corresponding to the capacity judgment scenario includes the remaining life of the brake battery; The determining the battery state of the brake battery based on the working data and the judgment threshold corresponding to the state judgment scenario includes: Based on the mapping relationship between the remaining life and the preset number of braking times, determining the maximum number of braking times corresponding to the remaining life; If the maximum number of braking times is less than or equal to the first number threshold, determining that the brake battery is in a state of severely limited capacity; If the maximum number of braking times is greater than the first number threshold, determining whether the maximum number of braking times is less than or equal to the second number threshold; If the maximum number of braking times is less than or equal to the second number threshold, it is determined that the brake battery is in a capacity-limited state.

9. A vehicle-mounted terminal, characterized in that: It includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the vehicle-mounted terminal implements the battery status determination method as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: It comprises a vehicle-mounted terminal, and the vehicle-mounted terminal is used to execute the battery status determination method as described in any one of claims 1-8.

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