Vehicle-mounted battery control method, device and equipment and storage medium

Abstract

The invention discloses a vehicle-mounted battery control method, device and equipment and a storage medium, and relates to the technical field of vehicle control, and the method comprises the steps: obtaining the current remaining electric quantity of a vehicle-mounted battery and a battery temperature parameter, and detecting whether the vehicle-mounted battery meets an abnormality processing condition or not; if the exception handling condition is met, correcting the current remaining electric quantity to obtain a corrected remaining electric quantity; searching a battery limit parameter in a battery calibration information table according to the corrected residual electric quantity and the battery temperature parameter; and controlling the power and / or current of the vehicle-mounted battery according to the battery limiting parameters. Whether the vehicle meets the exception handling condition or not is analyzed, whether the two-dimensional table can reflect the actual charging and discharging capacity of the vehicle-mounted battery or not is determined, and when the exception handling condition is met, the current remaining electric quantity is corrected firstly, and corresponding parameters are searched for in the battery calibration information table according to the corrected value for control. Therefore, the control of the vehicle-mounted battery is more suitable for the actual condition of the battery, and the control effect is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a vehicle-mounted battery control method, device, equipment, and storage medium. Background Art

[0002] The existing discharge strategy of electric vehicle power batteries (abbreviated as on-board batteries) is to use a two-dimensional table lookup of remaining capacity (SOC) and temperature to obtain the power and / or current allowed for discharge and recharge.

[0003] However, this two-dimensional table is obtained by performing a static voltage test on the battery. During the operation of the battery, it is affected by the discharge conditions and battery characteristics, which will cause the two-dimensional table to be unable to fully reflect the actual discharge and / or recharge capacity of the power battery. Directly using this two-dimensional table to control the vehicle battery will not actually have an ideal overall control effect. Summary of the Invention

[0004] The main purpose of this application is to provide a vehicle-mounted battery control method, device, equipment and storage medium, aiming to solve the technical problem that the existing technology directly uses two-dimensional table lookup control when controlling the vehicle-mounted battery, resulting in unsatisfactory control effect.

[0005] To achieve the above objectives, the present application proposes a vehicle battery control method, the method comprising:

[0006] Obtaining the current remaining power and battery temperature parameters of the vehicle battery, and detecting whether the vehicle battery meets the abnormality handling conditions;

[0007] If the abnormal processing condition is met, the current remaining power is corrected to obtain a corrected remaining power;

[0008] searching a battery limit parameter in a battery calibration information table according to the corrected remaining power and the battery temperature parameter, wherein the battery calibration information table stores battery limit parameters obtained by performing a static voltage test on the vehicle battery, the battery limit parameters including battery power and / or battery current;

[0009] The power and / or current of the vehicle battery is controlled according to the battery limiting parameter.

[0010] Optionally, at least one of the following conditions must be met to determine that the exception handling condition is met:

[0011] The vehicle battery does not trigger the remaining power correction within the preset time or preset mileage;

[0012] The cumulative number of charge and discharge times of the vehicle battery is greater than or equal to the preset cumulative determination number, and no remaining power correction is triggered;

[0013] The stored value corresponding to the remaining power correction in the vehicle battery is abnormal;

[0014] The number of abnormal power-off times of the vehicle corresponding to the on-board battery reaches the preset power-off times;

[0015] The difference between the measured parameters of the vehicle battery and the software estimated parameters is greater than a preset difference threshold.

[0016] Optionally, the correcting the current remaining power to obtain a corrected remaining power includes:

[0017] Correcting the current remaining power based on a first power correction method to obtain a first corrected remaining power, and / or correcting the current remaining power based on a second power correction method to obtain a second corrected remaining power;

[0018] The first corrected remaining power and / or the second corrected remaining power are used as the corrected remaining power.

[0019] Optionally, the correcting the current remaining power based on the first power correction method to obtain a first corrected remaining power includes:

[0020] Obtaining a first power correction coefficient;

[0021] Matching the current remaining power with the remaining power in the battery calibration information table to determine the target power;

[0022] Correcting the serial number corresponding to the target power according to the first power correction coefficient to obtain a corrected serial number;

[0023] The remaining power corresponding to the correction serial number in the battery calibration information table is used as the first corrected remaining power.

[0024] Optionally, the correcting the current remaining power based on the second power correction method to obtain a second corrected remaining power includes:

[0025] Obtaining a second power correction coefficient and obtaining a power interval span value corresponding to the battery calibration information table;

[0026] Determining a power correction value according to the second power correction coefficient and the power interval span value;

[0027] The current remaining power is corrected according to the power correction value to obtain a second corrected remaining power.

[0028] Optionally, the battery temperature parameter includes a maximum temperature value and a minimum temperature value, and the corrected remaining power includes a first corrected remaining power value and / or a second corrected remaining power value;

[0029] The searching for the battery limit parameter in the battery calibration information table according to the corrected remaining power and the battery temperature parameter includes:

[0030] searching a first limit parameter in a battery calibration information table according to the first corrected remaining power and the maximum temperature value, searching a second limit parameter in the battery calibration information table according to the first corrected remaining power and the minimum temperature value, and using the minimum value of the first limit parameter and the second limit parameter as a first candidate limit parameter;

[0031] and / or,

[0032] searching a third limit parameter in a battery calibration information table according to the second corrected remaining power and the maximum temperature value, searching a fourth limit parameter in the battery calibration information table according to the second corrected remaining power and the minimum temperature value, and using the minimum value of the third limit parameter and the fourth limit parameter as a second candidate limit parameter;

[0033] The maximum value of the first to-be-selected limit parameter and / or the second to-be-selected limit parameter is used as the battery limit parameter.

[0034] Optionally, after controlling the power and / or current of the vehicle battery according to the battery limit parameter, the method further includes:

[0035] If the vehicle battery triggers a pre-processing strategy, detecting the storage bits in each limit timing storage bit that store a value of zero or empty to obtain a value detection result, the pre-processing strategy includes a pre-undervoltage processing strategy and a pre-overvoltage processing strategy;

[0036] Determine the number of repeated triggering times according to the numerical detection result;

[0037] Obtaining the parameter change rate and monitoring timing value corresponding to the number of repeated triggering times;

[0038] Limiting the current or voltage change rate of the vehicle battery according to the parameter change rate and starting timing;

[0039] If the vehicle battery triggers the preprocessing strategy when the timing value is less than or equal to the monitoring timing value, the timing value is stored in the limit timing storage bit corresponding to the repeated triggering times, and the step of detecting the storage bit in each limit timing storage bit whose stored value is zero or empty to obtain the numerical detection result is returned.

[0040] In addition, to achieve the above objectives, the present application also proposes a vehicle-mounted battery control device, the vehicle-mounted battery control device comprising:

[0041] An acquisition module is used to obtain the current remaining power and battery temperature parameters of the vehicle battery and detect whether the vehicle battery meets the abnormality processing conditions;

[0042] a correction module, configured to correct the current remaining power to obtain a corrected remaining power if an abnormal processing condition is met;

[0043] a search module, configured to search a battery limit parameter in a battery calibration information table according to the corrected remaining power and the battery temperature parameter, wherein the battery calibration information table stores battery limit parameters obtained by performing a static voltage test on the vehicle battery, the battery limit parameters including battery power and / or battery current;

[0044] A control module is used to control the power and / or current of the vehicle battery according to the battery limit parameters.

[0045] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle-mounted battery control device, which includes: a memory, a processor, and a computer program stored on the memory and runnable on the processor, and the computer program is configured to implement the steps of the vehicle-mounted battery control method as described above.

[0046] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the vehicle battery control method as described above are implemented.

[0047] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the vehicle battery control method as described above.

[0048] One or more technical solutions proposed in this application have at least the following technical effects:

[0049] Since the analysis is to see whether the vehicle meets the abnormal handling conditions, it is determined whether the two-dimensional table can reflect the actual charge and discharge capacity of the vehicle battery. When the abnormal handling conditions are met, the current remaining power is corrected first, and the corresponding parameters are searched in the battery calibration information table according to the corrected value for control. This ensures that the control of the vehicle battery is more in line with the actual situation of the battery and improves the control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0051] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0052] Figure 1 A flowchart of the first embodiment of the vehicle battery control method of the present application is provided;

[0053] Figure 2 A flow chart illustrating a second embodiment of the vehicle battery control method of the present application;

[0054] Figure 3 A flowchart of the third embodiment of the vehicle battery control method of the present application is provided;

[0055] Figure 4 This is a schematic diagram of the module structure of the vehicle-mounted battery control device according to an embodiment of the present application;

[0056] Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in the vehicle battery control method in the embodiment of the present application.

[0057] The purpose, features and advantages of this application will be further explained with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0058] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0059] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0060] Based on this, the embodiment of the present application provides a vehicle battery control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the vehicle battery control method of the present application.

[0061] In this embodiment, the vehicle battery control method includes steps S10 to S40:

[0062] Step S10: obtaining the current remaining power and battery temperature parameters of the vehicle-mounted battery, and detecting whether the vehicle-mounted battery meets the abnormality processing conditions.

[0063] It should be noted that the executor of this embodiment can be the vehicle itself, or an on-board battery control device arranged in the vehicle. The on-board battery control device can be a controller arranged in the vehicle, such as an ECU controller, or other identical or similar devices. This embodiment does not limit this. In this embodiment and the following embodiments, the on-board battery control method of this application is described using the on-board battery control device as an example.

[0064] It should be noted that the battery temperature parameter of the vehicle battery can be the temperature of the vehicle battery during operation, and the battery temperature parameter can include a maximum temperature and a minimum temperature, wherein the maximum temperature can be the maximum temperature that appears when the vehicle battery is running within a certain period of time (such as within 10 minutes or within 5 minutes), or the maximum temperature of the vehicle battery allowed to heat up when the vehicle battery maintains normal operation. Similarly, the minimum temperature can be the minimum temperature that appears when the vehicle battery is running within a certain period of time (such as within 10 minutes or within 5 minutes), or the minimum temperature of the vehicle battery allowed to heat up when the vehicle battery maintains normal operation.

[0065] In actual use, in order to determine whether the previously calibrated two-dimensional table of remaining capacity (SOC) and temperature can correctly reflect the actual charging and discharging capacity of the vehicle battery, it is possible to detect whether the vehicle battery meets the abnormal processing conditions.

[0066] In a specific implementation, in order to ensure accurate judgment, the vehicle battery may be judged to meet the abnormality judgment condition when at least one of the following conditions is met:

[0067] The vehicle battery does not trigger the remaining power correction within the preset time or preset mileage;

[0068] The cumulative number of charge and discharge times of the vehicle battery is greater than or equal to the preset cumulative determination number, and no remaining power correction is triggered;

[0069] The stored value corresponding to the remaining power correction in the vehicle battery is abnormal;

[0070] The number of abnormal power-off times of the vehicle corresponding to the on-board battery reaches the preset power-off times;

[0071] The difference between the measured parameters of the vehicle battery and the software estimated parameters is greater than a preset difference threshold.

[0072] It should be noted that the preset duration, preset mileage, preset cumulative determination times, and preset power-off determination times can all be set in advance by the manager of the vehicle-mounted battery control device.

[0073] It is understandable that if the remaining power of the on-board battery is not corrected within a period of time, or when the mileage of a vehicle equipped with an on-board battery exceeds a certain mileage, then due to the accumulation of various errors, the detected current remaining power will differ from the actual remaining power of the on-board battery. In this case, the two-dimensional table cannot accurately reflect the actual charge and discharge capacity of the on-board battery and needs to be corrected. Therefore, it can be determined that the abnormal processing conditions are met;

[0074] Similarly, if the vehicle battery has been charged and discharged multiple times but the remaining capacity of the vehicle battery has not been corrected, the detected current remaining capacity will be different from the actual remaining capacity of the vehicle battery. In this case, the two-dimensional table cannot accurately reflect the actual charge and discharge capacity of the vehicle battery and needs to be corrected. Therefore, it can be determined that the abnormal processing conditions are met;

[0075] If the stored value corresponding to the correction of the remaining power in the vehicle battery is abnormal, such as the corresponding stored value is lost or cannot be read, it is difficult to determine whether there is an error. In this case, for safety reasons, it can be determined that correction is required. Therefore, it can be determined that the abnormal processing conditions are met.

[0076] At the same time, if the number of abnormal power-off times of the vehicle corresponding to the vehicle battery is large, the vehicle battery may be damaged to a certain extent, which may lead to inaccurate judgment and need to be corrected. Therefore, it can be determined that the abnormal processing conditions are met;

[0077] In actual applications, if the actual measured parameters of the vehicle battery differ significantly from the software-estimated parameters, such as the actual measured current remaining power and the remaining power derived through a model or specific algorithm, if the difference between the two is greater than a certain value (such as 5% or 10%), it means that the vehicle battery needs to be corrected at this time. Therefore, it can be determined that the abnormal processing conditions are met.

[0078] Step S20: If the abnormal processing condition is met, the current remaining power is corrected to obtain a corrected remaining power.

[0079] Step S30: searching for battery limit parameters in a battery calibration information table according to the corrected remaining power and the battery temperature parameter.

[0080] It should be noted that the battery calibration information table is the two-dimensional table with the remaining capacity (SOC) and temperature as the horizontal and vertical coordinates respectively. The battery calibration information table stores battery limit parameters obtained by performing a static voltage test on the vehicle battery.

[0081] The battery calibration information table may include an ammeter and / or a voltmeter, based on which the battery limiting parameters may include battery power and / or battery current. The ammeter may be a two-dimensional table with the remaining capacity (SOC) and temperature as the horizontal and vertical coordinates, respectively, and the current value as the specific value in the table. Similarly, the voltmeter may be a two-dimensional table with the remaining capacity (SOC) and temperature as the horizontal and vertical coordinates, respectively, and the voltage value as the specific value in the table.

[0082] In actual application, the voltage and / or current used for control can be obtained by searching in a voltage meter and / or an ammeter according to the corrected remaining power and battery temperature parameters, thereby obtaining the battery limit parameters.

[0083] In actual use, if the vehicle battery meets the abnormal processing conditions, it means that the vehicle battery needs to be corrected. At this time, the two-dimensional table is actually difficult to represent the actual charging and discharging capabilities of the power battery. If the vehicle battery is controlled based on the two-dimensional table, it may lead to inaccurate control and difficulty in exerting the maximum capacity of the battery. In order to avoid this situation, the current remaining power can be corrected to obtain the corrected remaining power.

[0084] After the corrected remaining capacity is determined, the battery limit parameter can be searched in the battery calibration information table according to the corrected remaining capacity and the battery temperature parameter.

[0085] Step S40: Controlling the power and / or current of the vehicle battery according to the battery limit parameter.

[0086] In actual use, after obtaining the battery limit parameters, the power and / or current of the vehicle battery can be controlled according to the battery limit parameters, that is, the maximum current and / or maximum voltage allowed when the vehicle battery is charged or discharged is limited.

[0087] This embodiment provides a vehicle battery control method. Since it analyzes whether the vehicle meets the abnormal processing conditions, determines whether the two-dimensional table can reflect the actual charging and discharging capabilities of the vehicle battery, and when the abnormal processing conditions are met, first corrects the current remaining power, and then searches the battery calibration information table for the corresponding parameters based on the corrected value for control, it ensures that the control of the vehicle battery is more in line with the actual situation of the battery, thereby improving the control effect.

[0088] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 2 , step S20 of the vehicle battery control method includes steps S201 to S202:

[0089] Step S201: If the abnormal processing condition is met, the current remaining power is corrected based on the first power correction method to obtain a first corrected remaining power, and / or the current remaining power is corrected based on the second power correction method to obtain a second corrected remaining power.

[0090] Step S202: using the first corrected remaining power and / or the second corrected remaining power as the corrected remaining power.

[0091] It should be noted that, in order to ensure the power correction effect, this embodiment provides a first power correction method and a second power correction method. The two power correction methods can be used separately or in combination.

[0092] In actual use, if the two power correction methods are used separately, the value obtained using the power correction method can be directly used as the corrected remaining power. For example: if only the first power correction method is used to correct the current remaining power, the first corrected remaining power can be directly used as the corrected remaining power.

[0093] If two power correction methods are used in combination, the values obtained after power correction by the two methods can be used as the corrected remaining power. For example, if the first power correction method and the second power correction method are used to correct the current remaining power respectively, the first corrected remaining power and the second corrected remaining power can be used as the corrected remaining power.

[0094] In actual use, there are differences between the two power correction methods. In this embodiment, correcting the current remaining power based on the first power correction method to obtain the first corrected remaining power may include:

[0095] Obtaining a first power correction coefficient;

[0096] Matching the current remaining power with the remaining power in the battery calibration information table to determine the target power;

[0097] Correcting the serial number corresponding to the target power according to the first power correction coefficient to obtain a corrected serial number;

[0098] The remaining power corresponding to the correction serial number in the battery calibration information table is used as the first corrected remaining power.

[0099] It should be noted that the first power correction coefficient can be defined according to the interval span of the power current set (map) corresponding to the discharge and recharge of the vehicle battery. For example, when the vehicle accumulates X1 mileage or Y1 ampere (A) current, the first power correction coefficient n = 1; when the vehicle accumulates X2 mileage or Y2 ampere-hours, the first power correction coefficient n = 2; when the vehicle accumulates X3 mileage or Y3 ampere-hours, the first power correction coefficient n = 3, and so on. <X2<X3<...<Xk,Y1<Y2<Y3<...<Yk。

[0100] In actual use, the current remaining power can be compared with the remaining power in the battery calibration information table to determine the target power, that is, the coordinate value corresponding to the current remaining power in the battery calibration information table. Afterwards, the serial number corresponding to the target power can be corrected according to the first power correction coefficient to obtain the corrected serial number. Finally, the remaining power corresponding to the corrected serial number in the battery calibration information table is used as the first corrected remaining power.

[0101] It should be noted that battery operating conditions can be divided into two categories: discharge conditions and energy recovery conditions.

[0102] In actual use, the corresponding battery operating condition of the on-board battery can be determined based on the vehicle's current operating conditions. For example, when the driver steps on the accelerator pedal to accelerate the vehicle, the battery operating condition can be determined to be a discharge condition. When the driver releases the accelerator pedal or steps on the brake pedal, the battery operating condition can be determined to be an energy recovery condition. When correcting the sequence number corresponding to the target power level based on the first power correction coefficient, the correction can be made in conjunction with the battery operating condition.

[0103] For ease of understanding, an example is given below, but this does not limit the present solution:

[0104] Assume that the current remaining power is M, and the remaining power in the battery calibration information table is 0, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100, respectively, in percentage. If M is less than 30 and greater than 20, it can be determined that the target power corresponding to M is 30, and the sequence number corresponding to 30 is 4. At this time, the first power correction coefficient n obtained is 1. If the battery operating condition is the discharge condition, the correction sequence number = 4-n = 3, and the first corrected remaining power is 20%;

[0105] If the battery operating condition is the energy recovery condition, the correction number = 4 + n = 5, and the first correction remaining power is 40%.

[0106] In actual use, there are differences between the two power correction methods. In this embodiment, the current remaining power is corrected based on the second power correction method to obtain the second corrected remaining power, including:

[0107] Obtaining a second power correction coefficient and obtaining a power interval span value corresponding to the battery calibration information table;

[0108] Determining a power correction value according to the second power correction coefficient and the power interval span value;

[0109] The current remaining power is corrected according to the power correction value to obtain a second corrected remaining power.

[0110] It should be noted that the power interval span value corresponding to the battery calibration information table can be the difference between two adjacent remaining powers in the battery calibration information table. For example, if the remaining powers in the battery calibration information table are 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100, and the unit is percentage, then the power interval span value is 10%.

[0111] In actual use, the second power correction coefficient is set in a similar manner to the first power correction coefficient, but the second power correction coefficient can be a decimal, that is, a floating point value.

[0112] In specific applications, the second power correction coefficient can be multiplied by the power interval span value, and the obtained product can be used as the power correction value. When correcting the current remaining power according to the power correction value, it can also be combined with the battery operating conditions.

[0113] For ease of understanding, an example is given below, but this does not limit the present solution:

[0114] Assume that the current remaining power is M, and the remaining power in the battery calibration information table is 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100, respectively, in percentage. The power interval span value is 10% at this time. The first power correction coefficient n obtained at this time is 0.6. If the battery operating condition is the discharge condition, the second corrected remaining power = M-0.6*10%;

[0115] If the battery operating condition is the energy recovery condition, the second corrected remaining capacity = M + 0.6 * 10%.

[0116] In a specific implementation, the battery temperature parameter may include a maximum temperature value and a minimum temperature value, and depending on the adopted power correction method, the corrected residual voltage may include a first corrected residual voltage and / or a second corrected residual voltage. To ensure that the final battery limit parameter can be obtained normally, step S30 in this embodiment may include:

[0117] searching a first limit parameter in a battery calibration information table according to the first corrected remaining power and the maximum temperature value, searching a second limit parameter in the battery calibration information table according to the first corrected remaining power and the minimum temperature value, and using the minimum value of the first limit parameter and the second limit parameter as a first candidate limit parameter;

[0118] and / or,

[0119] searching a third limit parameter in a battery calibration information table according to the second corrected remaining power and the maximum temperature value, searching a fourth limit parameter in the battery calibration information table according to the second corrected remaining power and the minimum temperature value, and using the minimum value of the third limit parameter and the fourth limit parameter as a second candidate limit parameter;

[0120] The maximum value of the first to-be-selected limit parameter and / or the second to-be-selected limit parameter is used as the battery limit parameter.

[0121] It should be noted that if only the first power correction method is used, the first selected limit parameter can be directly used as the battery limit parameter; if only the second power correction method is used, the second selected limit parameter can be directly used as the battery limit parameter; and if both the first power correction method and the second power correction method are used at the same time, the maximum value of the first selected limit parameter and the second selected limit parameter needs to be used as the battery limit parameter.

[0122] For ease of understanding, the following examples are given, but are not intended to limit this solution:

[0123] Assume that the maximum temperature is Tmax, the minimum temperature is Tmin, the first corrected remaining capacity is SOC1, and the second corrected remaining capacity is SOC2;

[0124] If only the first power correction method is used, the first limit parameter can be expressed as (SOC1, Tmax), and the second limit parameter can be expressed as (SOC1, Tmin). In this case, the battery limit parameter lab_now=the first candidate parameter lab_now1=min((SOC1, Tmax), (SOC1, Tmin));

[0125] If only the second power correction method is used, the third limit parameter can be expressed as (SOC2, Tmax), and the fourth limit parameter can be expressed as (SOC2, Tmin). In this case, the battery limit parameter lab_now=the second candidate parameter lab_now2=min((SOC2, Tmax), (SOC2, Tmin));

[0126] If the first power correction method and the second power correction method are used at the same time, the first limit parameter can be expressed as (SOC1, Tmax), the second limit parameter can be expressed as (SOC1, Tmin), the third limit parameter can be expressed as (SOC2, Tmax), and the fourth limit parameter can be expressed as (SOC2, Tmin). At this time, the first candidate parameter lab_now1 = min((SOC1, Tmax), (SOC1, Tmin)), the second candidate parameter lab_now2 = min((SOC2, Tmax), (SOC2, Tmin)), and the final battery limit parameter lab_now = max(lab_now1, lab_now2).

[0127] Among them, min() is a function for finding the minimum value, and max is a function for finding the maximum value.

[0128] This embodiment provides a vehicle battery control method. This embodiment provides multiple power correction methods to ensure that the appropriate power correction method can be flexibly selected according to actual needs, ensuring that it is more in line with the actual battery status and meets the control requirements of the vehicle battery.

[0129] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 3 After step S40, the vehicle battery control method further includes steps S50 to S90:

[0130] Step S50: If the vehicle-mounted battery triggers the pre-processing strategy, the storage bits storing the value of zero or empty in each limit timing storage bit are detected to obtain a value detection result.

[0131] Step S60: determining the number of repeated triggering times according to the numerical detection result.

[0132] Step S70: Obtain the parameter change rate and monitoring timing value corresponding to the number of repeated triggering times.

[0133] Step S80: limiting the current or voltage change speed of the vehicle battery according to the parameter change rate, and starting timing.

[0134] Step S90: If the vehicle battery triggers the preprocessing strategy when the timing value is less than or equal to the monitoring timing value, the timing value is stored in the limit timing storage bit corresponding to the repeated triggering times, and the step of detecting the storage bits in each limit timing storage bit whose stored values are zero or empty to obtain the numerical detection result is returned.

[0135] It should be noted that during discharge, if the limit is too slow, the cell voltage drops quickly, which can easily trigger an undervoltage fault and cannot better protect the battery pack. If the limit is too fast, the battery pack discharge power decreases rapidly, and the battery pack capacity is not fully utilized. During recharging (i.e., energy recovery), if the limit is too slow, the cell voltage rises quickly, which can easily trigger an overvoltage fault and cannot better protect the battery pack. If the limit is too fast, the energy recovery power decreases rapidly, and the battery pack capacity is not fully utilized. To avoid triggering battery over-discharge or overcharging, relevant strategies are usually set to limit the discharge and recharge power of the power battery pack through the processing logic provided by the strategy to protect the battery pack.

[0136] Based on this, the pre-processing strategy includes a pre-undervoltage processing strategy and a pre-overvoltage processing strategy. The pre-undervoltage processing strategy is the processing logic for dealing with undervoltage faults during discharge, and the pre-overvoltage processing strategy is the processing logic for dealing with overvoltage faults during energy recovery.

[0137] In actual use, when controlling the vehicle battery, its operating parameters can be monitored. When the operating parameters meet the triggering conditions of the pre-processing strategy (such as when the battery cell voltage is lower than the threshold and lasts for a period of time, it is determined to trigger the pre-undervoltage processing strategy. Energy recovery is similar and will not be repeated here), in order to reasonably limit it, you can first detect the storage bits in each limit timing storage bit that store a value of zero or empty to obtain the numerical detection result.

[0138] The limit timing storage bit may be a parameter for storing a limit timing value.

[0139] In actual use, the limit timing storage bits have a sequence of use (for example, if there are three storage bits, ST1, ST2, and ST3, ST1 is used first, and then if it is repeatedly triggered, ST2 is used, and if it is triggered again, ST3 is used for testing). Based on this sequence of use, the number of repeated triggering of the preprocessing strategy can be determined according to the numerical detection results. For example: if the storage values of all limit timing storage bits are 0 or empty, it can be determined that the preprocessing strategy is triggered for the first time; if only the first of the limit timing storage bits is not 0 or empty, it can be determined that the preprocessing strategy is triggered for the second time, and so on.

[0140] In actual applications, different repeated trigger times can correspond to different parameter change rates and monitoring timing values. For example, the parameter change rate corresponding to repeated trigger times 1 is SK1, and the monitoring timing value is T1; the parameter change rate corresponding to repeated trigger times 2 is SK2, and the monitoring timing value is T2; and so on.

[0141] The greater the number of repeated triggering times, the greater the limited parameter change rate can be, and the greater the monitoring timing value can be.

[0142] In actual use, after obtaining the parameter change rate and monitoring timing value corresponding to the number of repeated triggers, the current or voltage change speed of the vehicle battery can be limited according to the parameter change rate, and the timing can be started. At the same time, during the timing process, the vehicle battery is continuously detected to see if it triggers the pre-processing strategy;

[0143] If the vehicle battery triggers the preprocessing strategy when the timing value is less than or equal to the detection timing value, the timing number can be stored in the limit timing storage bit corresponding to the number of repeated triggering times, and the process returns to the above-mentioned step of detecting the storage bits in each limit timing storage bit whose stored value is zero or empty to obtain the numerical detection result if the vehicle battery triggers the preprocessing strategy.

[0144] For example: assuming that the number of repeated triggers is 1, the corresponding parameter change rate is SK1, and the monitoring timing value T1 is then limited according to SK1. At the same time, timing is performed. If the timing value t is less than or equal to T1, it is detected that the on-board battery triggers the preprocessing strategy, and the timing value t is stored in the limit timing storage bit ST1 corresponding to the number of repeated triggers, and the process returns to execute the step of detecting the storage bits in each limit timing storage bit whose stored value is zero or empty if the on-board battery triggers the preprocessing strategy, and obtaining the numerical detection result.

[0145] This embodiment provides a vehicle battery control method. After the battery is controlled, it will further detect whether the vehicle battery triggers the pre-processing strategy. When the pre-processing strategy is triggered, appropriate parameters are used to limit it according to the number of repeated triggering, and continuous detection is performed at the same time, making the control more precise and better avoiding the occurrence of pre-undervoltage and pre-overvoltage phenomena.

[0146] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the vehicle battery control method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0147] This application also provides a vehicle-mounted battery control device, please refer to Figure 4 , the vehicle-mounted battery control device includes:

[0148] An acquisition module 10 is configured to acquire the current remaining power and battery temperature parameters of the vehicle battery and detect whether the vehicle battery meets an abnormality handling condition;

[0149] a correction module 20, configured to correct the current remaining power to obtain a corrected remaining power if an abnormality handling condition is met;

[0150] a search module 30, configured to search a battery calibration information table for battery limit parameters based on the corrected remaining power and the battery temperature parameter, wherein the battery calibration information table stores battery limit parameters obtained by performing a static voltage test on the vehicle battery, the battery limit parameters including battery power and / or battery current;

[0151] The control module 40 is configured to control the power and / or current of the vehicle-mounted battery according to the battery limiting parameters.

[0152] The vehicle-mounted battery control device provided in this application utilizes the vehicle-mounted battery control method of the aforementioned embodiment, resolving the technical issue of prior art techniques that directly utilize two-dimensional table lookup control to control vehicle-mounted batteries, resulting in unsatisfactory control effects. Compared to prior art techniques, the vehicle-mounted battery control device provided in this application achieves the same beneficial effects as the vehicle-mounted battery control method of the aforementioned embodiment, and the other technical features of the vehicle-mounted battery control device are the same as those disclosed in the aforementioned embodiment method, which are not further detailed here.

[0153] The present application provides a vehicle-mounted battery control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle-mounted battery control method in the above-mentioned embodiment one.

[0154] Reference below Figure 5 , which shows a schematic structural diagram of a vehicle-mounted battery control device suitable for implementing an embodiment of the present application. The vehicle-mounted battery control device in the embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 5 The vehicle-mounted battery control device shown is merely an example and should not impose any limitations on the functions and scope of use of the embodiments of the present application.

[0155] like Figure 5As shown, the vehicle battery control device may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory 1002 or the program loaded from the storage device 1003 into the random access memory 1004. The random access memory 1004 also stores various programs and data required for the operation of the device. The processing device 1001, the read-only memory 1002 and the random access memory 1004 are connected to each other via a bus 1005. The input / output interface 1006 is also connected to the bus. Generally, the following systems can be connected to the input / output interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle battery control device to communicate with other devices wirelessly or wired to exchange data. Although the figure shows a vehicle battery control device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or provided instead.

[0156] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a read-only memory 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are performed.

[0157] The vehicle-mounted battery control device provided in this application utilizes the vehicle-mounted battery control method of the aforementioned embodiment, resolving the technical issue of prior art techniques that directly utilize two-dimensional table lookup control to control vehicle-mounted batteries, resulting in unsatisfactory control effects. Compared to prior art techniques, the beneficial effects of the vehicle-mounted battery control device provided in this application are the same as those of the vehicle-mounted battery control method provided in the aforementioned embodiment. Other technical features of this vehicle-mounted battery control device are the same as those disclosed in the aforementioned embodiment and are not further elaborated upon here.

[0158] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0159] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0160] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer program) stored thereon, and the computer-readable program instructions are used to execute the vehicle battery control method in the above embodiment.

[0161] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0162] The computer-readable storage medium may be included in the vehicle-mounted battery control device; or may exist independently without being assembled into the vehicle-mounted battery control device.

[0163] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by a vehicle-mounted battery control device, the vehicle-mounted battery control device is caused to: obtain the current remaining power and battery temperature parameters of the vehicle-mounted battery, and detect whether the vehicle-mounted battery meets an abnormality handling condition; if the abnormality handling condition is met, correct the current remaining power to obtain a corrected remaining power; search a battery calibration information table for battery limit parameters based on the corrected remaining power and the battery temperature parameters, the battery calibration information table storing battery limit parameters obtained by performing a static voltage test on the vehicle-mounted battery, the battery limit parameters including battery power and / or battery current; and control the power and / or current of the vehicle-mounted battery based on the battery limit parameters.

[0164] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0165] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0166] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0167] The computer-readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described vehicle battery control method. This computer-readable storage medium can address the technical problem of the prior art of directly using a two-dimensional table lookup control to control the vehicle battery, resulting in unsatisfactory control effects. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the vehicle battery control method provided in the above-described embodiment, and are not further elaborated here.

[0168] The present application also provides a computer program product, comprising a computer program, which implements the steps of the above-mentioned vehicle battery control method when executed by a processor.

[0169] The computer program product provided in this application can solve the technical problem of the prior art of directly using a two-dimensional table lookup to control an onboard battery, resulting in unsatisfactory control effects. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the onboard battery control method provided in the above embodiment, and will not be elaborated here.

[0170] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle battery control method, characterized in that: The vehicle battery control method includes: Obtaining the current remaining power and battery temperature parameters of the vehicle battery, and detecting whether the vehicle battery meets the abnormality handling conditions; If the abnormal processing condition is met, the current remaining power is corrected to obtain a corrected remaining power; searching a battery limit parameter in a battery calibration information table according to the corrected remaining power and the battery temperature parameter, wherein the battery calibration information table stores battery limit parameters obtained by performing a static voltage test on the vehicle battery, the battery limit parameters including battery power and / or battery current; The power and / or current of the vehicle battery is controlled according to the battery limiting parameter.

2. The vehicle-mounted battery control method according to claim 1, wherein: The exception handling conditions are met if at least one of the following is met: The vehicle battery does not trigger the remaining power correction within the preset time or preset mileage; The cumulative number of charge and discharge times of the vehicle battery is greater than or equal to the preset cumulative determination number, and no remaining power correction is triggered; The stored value corresponding to the remaining power correction in the vehicle battery is abnormal; The number of abnormal power-off times of the vehicle corresponding to the on-board battery reaches the preset power-off times; The difference between the measured parameters of the vehicle battery and the software estimated parameters is greater than a preset difference threshold.

3. The vehicle-mounted battery control method according to claim 1, wherein: The correcting the current remaining power to obtain the corrected remaining power includes: Correcting the current remaining power based on a first power correction method to obtain a first corrected remaining power, and / or correcting the current remaining power based on a second power correction method to obtain a second corrected remaining power; The first corrected remaining power and / or the second corrected remaining power are used as the corrected remaining power.

4. The vehicle-mounted battery control method according to claim 3, wherein: The correcting the current remaining power based on the first power correction method to obtain a first corrected remaining power includes: Obtaining a first power correction coefficient; Matching the current remaining power with the remaining power in the battery calibration information table to determine the target power; Correcting the serial number corresponding to the target power according to the first power correction coefficient to obtain a corrected serial number; The remaining power corresponding to the correction serial number in the battery calibration information table is used as the first corrected remaining power.

5. The vehicle-mounted battery control method according to claim 3, wherein: The correcting the current remaining power based on the second power correction method to obtain a second corrected remaining power includes: Obtaining a second power correction coefficient and obtaining a power interval span value corresponding to the battery calibration information table; Determining a power correction value according to the second power correction coefficient and the power interval span value; The current remaining power is corrected according to the power correction value to obtain a second corrected remaining power.

6. The vehicle-mounted battery control method according to claim 1, wherein: The battery temperature parameter includes a maximum temperature value and a minimum temperature value, and the corrected remaining power includes a first corrected remaining power value and / or a second corrected remaining power value; The searching for the battery limit parameter in the battery calibration information table according to the corrected remaining power and the battery temperature parameter includes: searching a first limit parameter in a battery calibration information table according to the first corrected remaining power and the maximum temperature value, searching a second limit parameter in the battery calibration information table according to the first corrected remaining power and the minimum temperature value, and using the minimum value of the first limit parameter and the second limit parameter as a first candidate limit parameter; and / or, searching a third limit parameter in a battery calibration information table according to the second corrected remaining power and the maximum temperature value, searching a fourth limit parameter in the battery calibration information table according to the second corrected remaining power and the minimum temperature value, and using the minimum value of the third limit parameter and the fourth limit parameter as a second candidate limit parameter; The maximum value of the first to-be-selected limit parameter and / or the second to-be-selected limit parameter is used as the battery limit parameter.

7. The vehicle-mounted battery control method according to any one of claims 1 to 6, characterized in that: After controlling the power and / or current of the vehicle battery according to the battery limiting parameters, the method further includes: If the vehicle battery triggers a pre-processing strategy, detecting the storage bits in each limit timing storage bit that store a value of zero or empty to obtain a value detection result, the pre-processing strategy includes a pre-undervoltage processing strategy and a pre-overvoltage processing strategy; Determine the number of repeated triggering times according to the numerical detection result; Obtaining the parameter change rate and monitoring timing value corresponding to the number of repeated triggering times; Limiting the current or voltage change rate of the vehicle battery according to the parameter change rate and starting timing; If the vehicle battery triggers the preprocessing strategy when the timing value is less than or equal to the monitoring timing value, the timing value is stored in the limit timing storage bit corresponding to the repeated triggering times, and the step of detecting the storage bit in each limit timing storage bit whose stored value is zero or empty to obtain the numerical detection result is returned.

8. A vehicle-mounted battery control device, characterized in that: The vehicle-mounted battery control device comprises: An acquisition module is used to obtain the current remaining power and battery temperature parameters of the vehicle battery and detect whether the vehicle battery meets the abnormality processing conditions; a correction module, configured to correct the current remaining power to obtain a corrected remaining power if an abnormal processing condition is met; a search module, configured to search a battery limit parameter in a battery calibration information table according to the corrected remaining power and the battery temperature parameter, wherein the battery calibration information table stores battery limit parameters obtained by performing a static voltage test on the vehicle battery, the battery limit parameters including battery power and / or battery current; A control module is used to control the power and / or current of the vehicle battery according to the battery limit parameters.

9. A vehicle-mounted battery control device, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle battery control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle battery control method according to any one of claims 1 to 7 are implemented.

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