Method, device, equipment and storage medium for correcting battery SOC misjudgment

Abstract

The present invention relates to the technical field of data processing, and discloses a method, device, equipment and storage medium for correcting misjudgment of battery power SOC. The method comprises: calculating the current power SOC of the battery according to the current voltage, current current and current state of the battery as well as the vehicle; determining the current mode of the battery according to the current power SOC and a preset power SOC threshold, obtaining the corresponding real-time voltage and real-time current according to the current mode, calculating a target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC; because the present invention determines the current mode of the battery by the current power SOC and the preset power SOC threshold, then calculates the target corrected power SOC according to the real-time voltage and the real-time current, and then corrects the current power SOC based on the target corrected power SOC, compared with the prior art of directly judging an action by the power SOC measured by a sensor, the accuracy of judging an action can be effectively improved, and the power SOC can be dynamically corrected.

Description

Technical Field

[0001] The present invention relates to the field of data processing technology, and in particular to a correction method, device, equipment and storage medium for misjudgment of battery power SOC. Background Art

[0002] With the continuous development of vehicle technology, the performance of vehicles has gradually improved. There are many factors that affect the performance of vehicles, such as the remaining battery capacity SOC. At present, the battery power SOC is realized by the battery sensor through the open circuit voltage method and the ampere-hour integration method. However, the ampere-hour integration method will deviate over time, and the correction of the open circuit voltage method requires a long period of static. In summary, the power SOC accuracy is low or misjudgment will eventually occur. When the power SOC accuracy is low, it affects the function actuation. When the power SOC is misjudged, it causes the battery to be fed, and in severe cases, it even causes the vehicle to be unable to start. The standard for judging the actuation is the power SOC, and the current power SOC is monitored by the battery sensor. However, when the power SOC is wrong, the accuracy of judging the actuation is low.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a method, device, equipment and storage medium for correcting misjudgment of battery power SOC, aiming to solve the technical problems of low accuracy of judgment action and inability to dynamically correct power SOC in the prior art.

[0005] To achieve the above object, the present invention provides a method for correcting a battery power SOC misjudgment, the method comprising the following steps:

[0006] Get the current voltage and current of the battery and the current state of the vehicle;

[0007] Calculate the current charge SOC of the battery according to the current voltage, current current and current state;

[0008] Determine a current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtain corresponding real-time voltage and real-time current according to the current mode;

[0009] The target corrected electrical quantity SOC is calculated according to the real-time voltage and the real-time current, and the current electrical quantity SOC is corrected by the target corrected electrical quantity SOC.

[0010] Optionally, the current mode includes a discharge mode, the real-time voltage includes a first real-time voltage, the real-time current includes a first real-time current, and the target corrected SOC includes a first corrected SOC;

[0011] The determining the current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtaining the corresponding real-time voltage and real-time current according to the current mode, includes:

[0012] When the current power SOC is greater than a preset power SOC threshold, determining that the current mode of the battery is a discharge mode;

[0013] Discharging the battery according to the discharge mode to obtain a first real-time voltage and a first real-time current;

[0014] Accordingly, the calculating the target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC, includes:

[0015] A first corrected electrical quantity SOC is calculated according to the first real-time voltage and the first real-time current, and the current electrical quantity SOC is corrected by the first corrected electrical quantity SOC.

[0016] Optionally, before calculating a first corrected power SOC according to the first real-time voltage and the first real-time current and correcting the current power SOC by using the first corrected power SOC, the method further includes:

[0017] Get the current temperature of the target battery;

[0018] Discharging the target battery according to the current temperature within a preset time period to obtain a target discharge curve;

[0019] The step of calculating a first corrected electrical quantity SOC according to the first real-time voltage and the first real-time current according to the target discharge curve, and correcting the current electrical quantity SOC by the first corrected electrical quantity SOC.

[0020] Optionally, discharging the target battery according to the current temperature within a preset time period to obtain a target discharge curve includes:

[0021] Discharging the target battery according to the current temperature within a preset time period to obtain one or more current discharge curves;

[0022] Obtaining a set of discharge temperature and current parameters according to the one or more current discharge curves;

[0023] Determining a discharge current coefficient by using the discharge temperature and current parameter set;

[0024] A target discharge curve is generated according to the discharge current coefficient and a current discharge curve.

[0025] Optionally, the step of calculating a first corrected power SOC according to the first real-time voltage and the first real-time current according to the target discharge curve, and correcting the current power SOC by the first corrected power SOC includes:

[0026] Calculating the first real-time current according to the target discharge curve to obtain a current discharge voltage threshold;

[0027] When the first real-time voltage is less than the current discharge voltage threshold, calculating a first corrected SOC according to the target voltage and the target current;

[0028] The previous electrical quantity SOC is corrected by using the first corrected electrical quantity SOC.

[0029] Optionally, the current mode includes a charging mode, the real-time voltage includes a second real-time voltage, the real-time current includes a second real-time current, and the target corrected SOC includes a second corrected SOC;

[0030] The determining the current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtaining the corresponding real-time voltage and real-time current according to the current mode, includes:

[0031] When the current power SOC is less than a preset power SOC threshold, determining that the current mode of the battery is a charging mode;

[0032] Charging the battery according to the charging mode to obtain a second real-time voltage and a second real-time current;

[0033] Accordingly, the calculating the target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC, includes:

[0034] A second corrected electrical quantity SOC is calculated according to the second real-time voltage and the second real-time current, and the current electrical quantity SOC is corrected by the second corrected electrical quantity SOC.

[0035] Optionally, the calculating a second corrected power SOC according to the second real-time voltage and the second real-time current, and correcting the current power SOC by the second corrected power SOC includes:

[0036] Charging the target battery according to the current temperature in a first time period to obtain a target charging curve;

[0037] Calculating the second real-time voltage according to the target charging curve to obtain a current charging current threshold;

[0038] When the second real-time current is less than the current charging current threshold, a second corrected power SOC is calculated according to the second real-time voltage and the second real-time current, and the current power SOC is corrected by the second corrected power SOC.

[0039] Optionally, charging the target battery according to the current temperature within the first time period to obtain a target charging curve includes:

[0040] Charging the target battery according to the current temperature in a first time period to obtain one or more current charging curves;

[0041] Obtaining a charging temperature and current parameter set according to the one or more current charging curves;

[0042] Determine a charging current coefficient by using the charging temperature and current parameter set;

[0043] A target charging curve is generated according to the charging current coefficient and the current charging curve.

[0044] Optionally, before determining the current mode of the battery according to the current power SOC and a preset power SOC threshold, the method further includes:

[0045] Obtain the vehicle's parking and discharging SOC change and starting power SOC;

[0046] Obtaining a lower limit power SOC according to the stop-discharge power SOC change and the start-up power SOC;

[0047] When the lower limit power SOC is less than the target power SOC threshold, determining whether the lower limit power SOC is greater than a preset depth of discharge power SOC;

[0048] When the lower limit power SOC is greater than the preset depth of discharge power SOC, the preset power SOC threshold is determined according to the lower limit power SOC, the preset degradation power SOC and the preset depth of discharge power SOC.

[0049] In addition, to achieve the above-mentioned purpose, the present invention further proposes a battery power SOC misjudgment correction device, the battery power SOC misjudgment correction device comprising:

[0050] An acquisition module, used for acquiring the current voltage and current of the battery and the current state of the vehicle;

[0051] A calculation module, used for calculating the current charge SOC of the battery according to the current voltage, current current and current state;

[0052] A determination module, configured to determine a current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtain corresponding real-time voltage and real-time current according to the current mode;

[0053] The correction module is used to calculate a target corrected power SOC according to the real-time voltage and the real-time current, and to correct the current power SOC by the target corrected power SOC.

[0054] In addition, to achieve the above-mentioned purpose, the present invention also proposes a battery power SOC misjudgment correction device, the battery power SOC misjudgment correction device comprising: a memory, a processor, and a battery power SOC misjudgment correction program stored in the memory and executable on the processor, the battery power SOC misjudgment correction program being configured to implement the battery power SOC misjudgment correction method as described above.

[0055] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which a correction program for battery power SOC misjudgment is stored. When the correction program for battery power SOC misjudgment is executed by a processor, the correction method for battery power SOC misjudgment as described above is implemented.

[0056] The method for correcting the misjudgment of the battery power SOC proposed by the present invention obtains the current voltage and current current of the battery and the current state of the vehicle; calculates the current power SOC of the battery according to the current voltage, current current and current state; determines the current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtains the corresponding real-time voltage and real-time current according to the current mode; calculates the target corrected power SOC according to the real-time voltage and real-time current, and corrects the current power SOC according to the target corrected power SOC; because the present invention determines the current mode of the battery through the current power SOC and the preset power SOC threshold, and then calculates the target corrected power SOC according to the real-time voltage and real-time current, and then corrects the current power SOC based on the target corrected power SOC, compared with the prior art of directly judging the actuation by the power SOC measured by the sensor, it can effectively improve the accuracy of judging the actuation and dynamically correct the power SOC. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a structural schematic diagram of a device for correcting battery power SOC misjudgment in a hardware operating environment involved in an embodiment of the present invention;

[0058] Figure 2 It is a flowchart diagram of a first embodiment of a method for correcting misjudgment of battery power SOC according to the present invention;

[0059] Figure 3 It is a flow chart of a second embodiment of a method for correcting misjudgment of battery power SOC according to the present invention;

[0060] Figure 4 A schematic diagram of a target discharge curve of an embodiment of a method for correcting misjudgment of battery power SOC according to the present invention;

[0061] Figure 5 It is a flow chart of a third embodiment of a method for correcting misjudgment of battery power SOC according to the present invention;

[0062] Figure 6 A schematic diagram of a target charging curve of an embodiment of a method for correcting misjudgment of battery power SOC according to the present invention;

[0063] Figure 7 It is a functional module diagram of the first embodiment of the battery SOC misjudgment correction device of the present invention.

[0064] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0065] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0066] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the structure of a device for correcting misjudgment of battery power SOC in a hardware operating environment according to an embodiment of the present invention.

[0067] like Figure 1As shown, the correction device for the battery power SOC misjudgment may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0068] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the correction device for battery power SOC misjudgment, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0069] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a correction program for battery power SOC misjudgment.

[0070] exist Figure 1 In the battery power SOC misjudgment correction device shown, the network interface 1004 is mainly used for data communication with the network integration platform workstation; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the battery power SOC misjudgment correction device of the present invention can be set in the battery power SOC misjudgment correction device, and the battery power SOC misjudgment correction device calls the battery power SOC misjudgment correction program stored in the memory 1005 through the processor 1001, and executes the battery power SOC misjudgment correction method provided by the embodiment of the present invention.

[0071] Based on the above hardware structure, an embodiment of a method for correcting misjudgment of battery power SOC of the present invention is proposed.

[0072] Reference Figure 2 , Figure 2 FIG. 1 is a flow chart of a first embodiment of a method for correcting misjudgment of battery power SOC according to the present invention.

[0073] In a first embodiment, the method for correcting a misjudgment of battery power SOC comprises the following steps:

[0074] Step S10, obtaining the current voltage and current of the battery and the current state of the vehicle.

[0075] It should be noted that the executor of this embodiment is a device for correcting misjudgment of battery power SOC, and may also be other devices that can achieve the same or similar functions, such as a vehicle controller, etc. This embodiment does not limit this. In this embodiment, a vehicle controller is taken as an example for explanation.

[0076] It should be understood that the current voltage refers to the voltage provided by the battery to the vehicle, which can be measured by a voltage sensor or other voltage measuring devices. The current current refers to the current provided by the battery to the vehicle, which can be measured by a current sensor or other current measuring devices. The current voltage and current current change in real time. The current state refers to the driving state of the vehicle, which includes acceleration, deceleration and stationary states.

[0077] Step S20, calculating the current charge SOC of the battery according to the current voltage, current current and current state.

[0078] It can be understood that the current SOC refers to the remaining power of the current vehicle battery. The SOC is usually expressed in the form of a percentage. The current SOC refers to the ratio of the remaining dischargeable power of the battery after it has been used for a period of time or has been unused for a long time to the power in its fully charged state. Since the accuracy of measuring the battery SOC directly through a battery sensor is low, this embodiment calculates the current state of the vehicle, the current voltage and the current current of the battery, so as to accurately obtain the current SOC of the battery.

[0079] Step S30, determining the current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtaining the corresponding real-time voltage and real-time current according to the current mode.

[0080] It should be understood that the preset SOC threshold refers to the reference value for setting the battery charge. When the current SOC is greater than or less than the preset SOC threshold, the current SOC needs to be dynamically corrected. That is, after obtaining the current SOC, the current SOC is compared with the preset SOC threshold to determine the current mode of the battery. Since the voltage and current of the battery will change in different modes, the battery is measured in real time by a voltage sensor and a current sensor to obtain the real-time voltage and current.

[0081] Further, step S30 includes: when the current power SOC is greater than a preset power SOC threshold, determining that the current mode of the battery is a discharge mode; discharging the battery according to the discharge mode to obtain a first real-time voltage and a first real-time current; accordingly, calculating the target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC, including: calculating a first corrected power SOC according to the first real-time voltage and the first real-time current, and correcting the current power SOC by the first corrected power SOC.

[0082] It can be understood that when the current power SOC is greater than the preset power SOC threshold, it indicates that the current mode of the battery is the discharge mode. At this time, the battery needs to be discharged to obtain a first real-time voltage and a first real-time current, that is, the first real-time voltage is the voltage of the battery after discharge, and the first real-time current is the current of the battery after discharge.

[0083] Further, step S30 includes: when the current power SOC is less than a preset power SOC threshold, determining that the current mode of the battery is a charging mode; charging the battery according to the charging mode to obtain a second real-time voltage and a second real-time current; accordingly, calculating the target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC, including: calculating the second corrected power SOC according to the second real-time voltage and the second real-time current, and correcting the current power SOC by the second corrected power SOC.

[0084] It should be understood that when the current power SOC is less than the preset power SOC threshold, it indicates that the current mode of the battery is the charging mode. At this time, the battery needs to be charged to obtain a second real-time voltage and a second real-time current, that is, the second real-time voltage is the voltage after the battery is charged, and the second real-time current is the current after the battery is discharged.

[0085] Furthermore, before step S30, it also includes: obtaining the stop and discharge SOC change and the starting SOC of the vehicle; obtaining the lower limit SOC according to the stop and discharge SOC change and the starting SOC; when the lower limit SOC is less than the target SOC threshold, judging whether the lower limit SOC is greater than the preset depth of discharge SOC; when the lower limit SOC is greater than the preset depth of discharge SOC, determining the preset SOC threshold according to the lower limit SOC, the preset degradation SOC and the preset depth of discharge SOC.

[0086] It can be understood that the stop-discharge SOC change refers to the amount of electricity caused by the slight power consumption of the vehicle when the engine is turned off. The starting SOC refers to the minimum SOC of the battery to start the vehicle. The preset discharge depth SOC refers to the battery discharge depth required for calculating the fuel consumption simulation. The preset discharge depth SOC is the maximum value of the battery SOC. The preset degradation SOC refers to the minimum SOC of the inherent degradation of the battery. The lower limit SOC of ISS and regenerative control action is calculated by the stop-discharge SOC change and the starting SOC, that is, the lower limit SOC = stop-discharge SOC change + starting SOC, the target current threshold SOC is 100%, when the lower limit SOC is less than the target current threshold SOC and the lower limit SOC is greater than the preset discharge depth SOC, the lower limit SOC, the preset degradation SOC and the preset discharge depth SOC obtain the current SOC threshold range, and the preset SOC threshold is selected from the current SOC threshold range. For example, the current SOC threshold range is (lower limit SOC & preset degradation SOC) ≤ The preset charge SOC threshold ≤ the preset discharge depth SOC.

[0087] Step S40, calculating a target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC.

[0088] It can be understood that the target corrected SOC refers to the SOC for correcting the current SOC, and the target corrected SOC includes a first corrected SOC and a second corrected SOC. The first corrected SOC refers to the SOC for correcting when the current SOC is greater than a preset SOC threshold, and the second corrected SOC refers to the SOC for correcting when the current SOC is less than the preset SOC threshold. When the current mode of the battery is the discharge mode, the real-time voltage at this time is the first real-time voltage, and the real-time current is the first real-time current. Specifically, after obtaining the first real-time voltage and the first real-time current, the current discharge voltage threshold of the battery is determined by the first real-time current and the target discharge curve, and it is determined whether the current discharge voltage threshold is greater than the first real-time voltage. If not, it is determined that the current SOC at this time is too high, that is, the current SOC is corrected by the first corrected SOC. For example, the current SOC is 8 5%, and the preset power SOC threshold is 80%, then the current power SOC is corrected to (79%, 80%) through the first corrected power SOC, at this time, the ISS and the regenerative control are prohibited from being actuated, and the generator generates electricity normally to charge the battery. When the discharge mode of the battery is the discharge mode, the real-time voltage at this time is the second real-time voltage, and the real-time current is the second real-time current. Specifically, after obtaining the second real-time voltage and the second real-time current, the current charging current threshold of the battery is determined by the second real-time voltage and the target charging curve, and it is determined whether the second real-time current is greater than the current charging current threshold. If not, it is determined that the current power SOC at this time is low, that is, the current power SOC is corrected by the second corrected power SOC. For example, if the current power SOC is 75%, and the preset power SOC threshold is 80%, then the current power SOC is corrected to (80%, 81%) through the second corrected power SOC, and at this time, the ISS and the regenerative control are allowed to be actuated to discharge the battery.

[0089] The present embodiment obtains the current voltage and current current of the battery and the current state of the vehicle; calculates the current charge SOC of the battery according to the current voltage, current current and current state; determines the current mode of the battery according to the current charge SOC and a preset charge SOC threshold, and obtains the corresponding real-time voltage and real-time current according to the current mode; calculates the target corrected charge SOC according to the real-time voltage and real-time current, and corrects the current charge SOC according to the target corrected charge SOC; since the present embodiment determines the current mode of the battery by the current charge SOC and a preset charge SOC threshold, and then calculates the target corrected charge SOC according to the real-time voltage and real-time current, and then corrects the current charge SOC based on the target corrected charge SOC, compared with the prior art of directly judging the actuation by the charge SOC measured by the sensor, it can effectively improve the accuracy of judging the actuation and dynamically correct the charge SOC.

[0090] In one embodiment, if Figure 3 The second embodiment of the method for correcting the misjudgment of the battery power SOC of the present invention is proposed based on the first embodiment. Before step S40, the method further includes:

[0091] Step S401, obtaining the current temperature of the target battery.

[0092] It should be understood that the current temperature refers to the temperature of the vehicle's battery. In order to effectively improve the accuracy of obtaining the target discharge curve, the current temperature is set to 25 degrees Celsius. It can also be set to other temperatures. This embodiment does not limit this and takes 25 degrees Celsius as an example for explanation.

[0093] Step S402, discharging the target battery according to the current temperature within a preset time period to obtain a target discharge curve.

[0094] It can be understood that the target discharge curve refers to a curve of continuous discharge at the current temperature and within a preset time period. The target discharge curve uses the discharge characteristics of the battery. The preset time period can be 30 seconds or other time periods. This embodiment is not limited to this. 30 seconds is used as an example for explanation. Since the battery voltage is constantly changing during the preset time period, the battery voltage is constantly changing. Figure 4 , Figure 4 It is the target discharge curve of the battery at 25 degrees Celsius and a time period of 30 seconds. The horizontal axis represents the current value during the discharge process, and the vertical axis represents the voltage value during the discharge process. It can be seen from the target discharge curve that the current value is negatively correlated with the voltage value.

[0095] Further, step S402 includes: discharging the target battery according to the current temperature within a preset time period to obtain one or more current discharge curves; obtaining a discharge temperature current parameter set according to the one or more current discharge curves; determining a discharge current coefficient through the discharge temperature current parameter set; and generating a target discharge curve according to the discharge current coefficient and the current discharge curve.

[0096] It should be understood that the target discharge curve is obtained by the discharge current coefficient and the current discharge curve. The number of the current discharge curve is not less than one, that is, one or more. For example, the target discharge curve is f=f(I Discharge @30s-25℃)+(1+I Discharge *k)(T-25)*0.2 / 55, where k is the coefficient, I discharge is the battery current. Since the coefficient k is an unknown number, we can select I under the discharge temperature and current parameter set. DischargeThe coefficient k is solved. The discharge temperature current parameter set is a set of no less than two discharge temperature current parameters. This embodiment is described by taking three discharge temperature current parameters as an example. The k solved at 40 degrees Celsius is k1, the k solved at 0 degrees Celsius is k2, and the k solved at -30 degrees Celsius is k3. At this time, the coefficient k=1 / 3(k1+k2+k3).

[0097] Step S403 , calculating a first corrected electrical quantity SOC according to the first real-time voltage and the first real-time current according to the target discharge curve, and correcting the current electrical quantity SOC by the first corrected electrical quantity SOC.

[0098] It can be understood that after obtaining the target discharge curve, the current discharge voltage threshold corresponding to the first real-time current is calculated through the target discharge curve, and whether the current power SOC is too high is judged according to the current discharge voltage threshold and the first real-time voltage. If the first real-time voltage is less than the current discharge voltage threshold, it indicates that the current power SOC is too high. At this time, the first corrected power SOC required to correct the battery is calculated based on the first real-time voltage and the first real-time current, and the current power SOC is corrected by the first corrected power SOC.

[0099] Further, step S403 includes: calculating the first real-time current according to the target discharge curve to obtain a current discharge voltage threshold; when the first real-time voltage is less than the current discharge voltage threshold, calculating a first corrected power SOC according to the target voltage and target current; and correcting the previous power SOC by the first corrected power SOC.

[0100] It should be understood that the current discharge voltage threshold refers to the voltage threshold corresponding to the first real-time current, which is specifically obtained by calculating the first real-time current through the target discharge curve. For example, the first real-time current is I1, and the current discharge voltage threshold calculated by the target discharge curve is f(I1), while the first real-time voltage is U1. At this time, U1<f(I1), then the first corrected power SOC is calculated through U1 and I1, and the current power SOC is corrected by the first corrected power SOC.

[0101] The present embodiment acquires the current temperature of the target battery; discharges the target battery according to the current temperature within a preset time period to obtain a target discharge curve; calculates a first corrected SOC according to the first real-time voltage and the first real-time current according to the target discharge curve, and corrects the current SOC by the first corrected SOC; since the present embodiment discharges the target battery according to the current temperature within a preset time period, and then calculates the first real-time voltage and the first real-time current according to the target discharge curve to obtain the first corrected SOC, and then corrects the current SOC by the first corrected SOC, it is possible to achieve dynamic correction of the SOC.

[0102] In one embodiment, if Figure 5 Based on the first embodiment, a third embodiment of the method for correcting misjudgment of battery power SOC of the present invention is proposed. Step S40 includes:

[0103] Step S404, charging the target battery according to the current temperature within the first time period to obtain a target charging curve.

[0104] It can be understood that the target charging curve refers to the curve of charging the target battery in the first time period and at the current temperature. The battery is charged in the first time period at the current temperature. During the charging process, the current gradually decreases with the passage of time and approaches a specific value in the first time period. The first time period can be 5 seconds or other time periods. This embodiment is not limited to this. 5 seconds is used as an example for explanation. Since the current of the battery will continue to change in the first time period, the reference Figure 6 , Figure 6 This is the target charging curve of the battery at 25 degrees Celsius and within 5 seconds. The horizontal axis represents time, and the vertical axis represents charging current. It can be seen from the target charging curve that the current is negatively correlated with time.

[0105] Further, step S404 includes: charging the target battery according to the current temperature within a first time period to obtain one or more current charging curves; obtaining a charging temperature and current parameter set according to the one or more current charging curves; determining a charging current coefficient through the charging temperature and current parameter set; and generating a target charging curve according to the charging current coefficient and the current charging curve.

[0106] It should be understood that the current charging curve refers to a curve for charging the target battery at the current temperature, and the number of the current charging curves is not less than one, that is, one or more. There is an unknown charging current coefficient K in the current charging curve. Due to the existence of the unknown charging current coefficient K, it is impossible to calculate the current charging current threshold corresponding to the second real-time voltage according to the current charging curve. Therefore, the current I of the charging temperature current parameter set is calculated. BAT Solve for the charging current coefficient K. The charging temperature current parameter set is a set of no less than two charging temperature current parameters. This embodiment takes three charging temperature current parameters as an example for explanation. The target charging curve is F(5s@UT)=F(5S@U-25℃)+(T-25)*K. For example, the current I at 40 degrees Celsius, 0 degrees Celsius, and -30 degrees Celsius is BAT The solved charging current coefficients are K1, K2 and K3 respectively. At this time, the charging current coefficient K=1 / 3(K1+K2+K3). After obtaining the charging current coefficient K, the charging current coefficient K is substituted into the current charging curve to generate the target charging curve.

[0107] Step S405: Calculate the second real-time voltage according to the target charging curve to obtain a current charging current threshold.

[0108] It should be understood that the second real-time voltage refers to the voltage after the battery is charged, that is, the current power SOC is less than the preset power SOC threshold. At this time, the current mode of the battery is the charging mode, that is, the battery is charged to obtain the second real-time voltage. Since the current and voltage of the battery will change during the charging process, the battery is measured in real time through the voltage sensor and the current sensor to obtain the second real-time voltage and the second real-time current. After obtaining the second real-time voltage, the second real-time voltage is calculated through the target charging curve to obtain the current charging current threshold.

[0109] Step S406, when the second real-time current is less than the current charging current threshold, a second corrected SOC is calculated according to the second real-time voltage and the second real-time current, and the current SOC is corrected by the second corrected SOC.

[0110] It can be understood that the second corrected SOC refers to the corrected SOC when the current SOC is less than the preset SOC threshold. Specifically, after obtaining the second real-time voltage and the second real-time current, the current charging current threshold of the battery is determined by the second real-time voltage and the target charging curve, and it is determined whether the second real-time current is less than the current charging current threshold. If so, it is determined that the current SOC is low. At this time, the current SOC is corrected by the second corrected SOC. For example, if the current SOC is 75% and the preset SOC threshold is 80%, the current SOC is corrected to (80%, 81%) by the second corrected SOC. At this time, the ISS and regenerative control are allowed to be activated to discharge the battery.

[0111] In this embodiment, a target charging curve is obtained by charging the target battery according to the current temperature within a first time period; the second real-time voltage is calculated according to the target charging curve to obtain a current charging current threshold; when the second real-time current is less than the current charging current threshold, a second corrected SOC is calculated according to the second real-time voltage and the second real-time current, and the current SOC is corrected by the second corrected SOC; since the present embodiment calculates the current charging current threshold corresponding to the second real-time voltage through the target charging curve, and determines whether the second real-time current is less than the current charging current threshold, if so, the second corrected SOC is calculated according to the second real-time voltage and the second real-time current, and finally the current SOC is corrected by the second corrected SOC, thereby achieving dynamic correction of the SOC and improving the accuracy of the judgment action.

[0112] In addition, an embodiment of the present invention further proposes a storage medium, on which a correction program for battery power SOC misjudgment is stored. When the correction program for battery power SOC misjudgment is executed by a processor, the steps of the method for correcting battery power SOC misjudgment as described above are implemented.

[0113] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0114] In addition, refer to Figure 7 The embodiment of the present invention further provides a battery power SOC misjudgment correction device, the battery power SOC misjudgment correction device comprising:

[0115] The acquisition module 10 is used to acquire the current voltage and current of the battery and the current state of the vehicle.

[0116] It should be understood that the current voltage refers to the voltage provided by the battery to the vehicle, which can be measured by a voltage sensor or other voltage measuring devices. The current current refers to the current provided by the battery to the vehicle, which can be measured by a current sensor or other current measuring devices. The current voltage and current current change in real time. The current state refers to the driving state of the vehicle, which includes acceleration, deceleration and stationary states.

[0117] The calculation module 20 is used to calculate the current charge SOC of the battery according to the current voltage, current current and current state.

[0118] It can be understood that the current SOC refers to the remaining power of the current vehicle battery. The SOC is usually expressed in the form of a percentage. The current SOC refers to the ratio of the remaining dischargeable power of the battery after it has been used for a period of time or has been unused for a long time to the power in its fully charged state. Since the accuracy of measuring the battery SOC directly through a battery sensor is low, this embodiment calculates the current state of the vehicle, the current voltage and the current current of the battery, so as to accurately obtain the current SOC of the battery.

[0119] The determination module 30 is used to determine the current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtain the corresponding real-time voltage and real-time current according to the current mode.

[0120] It should be understood that the preset SOC threshold refers to the reference value for setting the battery charge. When the current SOC is greater than or less than the preset SOC threshold, the current SOC needs to be dynamically corrected. That is, after obtaining the current SOC, the current SOC is compared with the preset SOC threshold to determine the current mode of the battery. Since the voltage and current of the battery will change in different modes, the battery is measured in real time by a voltage sensor and a current sensor to obtain the real-time voltage and current.

[0121] Furthermore, the determination module 30 is also used to determine that the current mode of the battery is a discharge mode when the current power SOC is greater than a preset power SOC threshold; discharge the battery according to the discharge mode to obtain a first real-time voltage and a first real-time current; accordingly, calculating the target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC, including: calculating a first corrected power SOC according to the first real-time voltage and the first real-time current, and correcting the current power SOC by the first corrected power SOC.

[0122] It can be understood that when the current power SOC is greater than the preset power SOC threshold, it indicates that the current mode of the battery is the discharge mode. At this time, the battery needs to be discharged to obtain a first real-time voltage and a first real-time current, that is, the first real-time voltage is the voltage of the battery after discharge, and the first real-time current is the current of the battery after discharge.

[0123] Furthermore, the determination module 30 is also used to determine that the current mode of the battery is a charging mode when the current power SOC is less than a preset power SOC threshold; charge the battery according to the charging mode to obtain a second real-time voltage and a second real-time current; accordingly, calculate the target corrected power SOC according to the real-time voltage and the real-time current, and correct the current power SOC by the target corrected power SOC, including: calculate the second corrected power SOC according to the second real-time voltage and the second real-time current, and correct the current power SOC by the second corrected power SOC.

[0124] It should be understood that when the current power SOC is less than the preset power SOC threshold, it indicates that the current mode of the battery is the charging mode. At this time, the battery needs to be charged to obtain a second real-time voltage and a second real-time current, that is, the second real-time voltage is the voltage after the battery is charged, and the second real-time current is the current after the battery is discharged.

[0125] Furthermore, the determination module 30 is also used to obtain the stop and discharge SOC change and the starting SOC of the vehicle; obtain the lower limit SOC according to the stop and discharge SOC change and the starting SOC; when the lower limit SOC is less than the target SOC threshold, determine whether the lower limit SOC is greater than a preset depth of discharge SOC; when the lower limit SOC is greater than a preset depth of discharge SOC, determine the preset SOC threshold according to the lower limit SOC, the preset degradation SOC and the preset depth of discharge SOC.

[0126] It can be understood that the stop-discharge SOC change refers to the amount of electricity caused by the slight power consumption of the vehicle when the engine is turned off. The starting SOC refers to the minimum SOC of the battery to start the vehicle. The preset discharge depth SOC refers to the battery discharge depth required for calculating the fuel consumption simulation. The preset discharge depth SOC is the maximum value of the battery SOC. The preset degradation SOC refers to the minimum SOC of the inherent degradation of the battery. The lower limit SOC of ISS and regenerative control action is calculated by the stop-discharge SOC change and the starting SOC, that is, the lower limit SOC = stop-discharge SOC change + starting SOC, the target current threshold SOC is 100%, when the lower limit SOC is less than the target current threshold SOC and the lower limit SOC is greater than the preset discharge depth SOC, the lower limit SOC, the preset degradation SOC and the preset discharge depth SOC obtain the current SOC threshold range, and the preset SOC threshold is selected from the current SOC threshold range. For example, the current SOC threshold range is (lower limit SOC & preset degradation SOC) ≤ The preset charge SOC threshold ≤ the preset discharge depth SOC.

[0127] The correction module 40 is used to calculate a target corrected power SOC according to the real-time voltage and the real-time current, and to correct the current power SOC by using the target corrected power SOC.

[0128] It can be understood that the target corrected SOC refers to the SOC for correcting the current SOC, and the target corrected SOC includes a first corrected SOC and a second corrected SOC. The first corrected SOC refers to the SOC for correcting when the current SOC is greater than a preset SOC threshold, and the second corrected SOC refers to the SOC for correcting when the current SOC is less than the preset SOC threshold. When the current mode of the battery is the discharge mode, the real-time voltage at this time is the first real-time voltage, and the real-time current is the first real-time current. Specifically, after obtaining the first real-time voltage and the first real-time current, the current discharge voltage threshold of the battery is determined by the first real-time current and the target discharge curve, and it is determined whether the current discharge voltage threshold is greater than the first real-time voltage. If not, it is determined that the current SOC at this time is too high, that is, the current SOC is corrected by the first corrected SOC. For example, the current SOC is 8 5%, and the preset power SOC threshold is 80%, then the current power SOC is corrected to (79%, 80%) through the first corrected power SOC, at this time, the ISS and the regenerative control are prohibited from being actuated, and the generator generates electricity normally to charge the battery. When the discharge mode of the battery is the discharge mode, the real-time voltage at this time is the second real-time voltage, and the real-time current is the second real-time current. Specifically, after obtaining the second real-time voltage and the second real-time current, the current charging current threshold of the battery is determined by the second real-time voltage and the target charging curve, and it is determined whether the second real-time current is greater than the current charging current threshold. If not, it is determined that the current power SOC at this time is low, that is, the current power SOC is corrected by the second corrected power SOC. For example, if the current power SOC is 75%, and the preset power SOC threshold is 80%, then the current power SOC is corrected to (80%, 81%) through the second corrected power SOC, and at this time, the ISS and the regenerative control are allowed to be actuated to discharge the battery.

[0129] The present embodiment obtains the current voltage and current current of the battery and the current state of the vehicle; calculates the current charge SOC of the battery according to the current voltage, current current and current state; determines the current mode of the battery according to the current charge SOC and a preset charge SOC threshold, and obtains the corresponding real-time voltage and real-time current according to the current mode; calculates the target corrected charge SOC according to the real-time voltage and real-time current, and corrects the current charge SOC according to the target corrected charge SOC; since the present embodiment determines the current mode of the battery by the current charge SOC and a preset charge SOC threshold, and then calculates the target corrected charge SOC according to the real-time voltage and real-time current, and then corrects the current charge SOC based on the target corrected charge SOC, compared with the prior art of directly judging the actuation by the charge SOC measured by the sensor, it can effectively improve the accuracy of judging the actuation and dynamically correct the charge SOC.

[0130] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0131] In addition, for technical details not described in detail in this embodiment, reference may be made to the method for correcting misjudgment of battery power SOC provided in any embodiment of the present invention, which will not be described in detail here.

[0132] In one embodiment, the determination module 30 is further used to obtain the stop and discharge SOC change and the starting SOC of the vehicle; obtain the lower limit SOC according to the stop and discharge SOC change and the starting SOC; when the lower limit SOC is less than the target SOC threshold, determine whether the lower limit SOC is greater than a preset depth of discharge SOC; when the lower limit SOC is greater than a preset depth of discharge SOC, determine the preset SOC threshold according to the lower limit SOC, the preset degradation SOC and the preset depth of discharge SOC.

[0133] In one embodiment, the determination module 30 is further used to determine that the current mode of the battery is a discharge mode when the current power SOC is greater than a preset power SOC threshold; discharge the battery according to the discharge mode to obtain a first real-time voltage and a first real-time current; calculate a first corrected power SOC according to the first real-time voltage and the first real-time current, and correct the current power SOC by the first corrected power SOC.

[0134] In one embodiment, the determination module 30 is also used to obtain the current temperature of the target battery; discharge the target battery according to the current temperature within a preset time period to obtain a target discharge curve; calculate a first corrected power SOC according to the first real-time voltage and the first real-time current according to the target discharge curve, and correct the current power SOC by the first corrected power SOC.

[0135] In one embodiment, the determination module 30 is further used to discharge the target battery according to the current temperature within a preset time period to obtain one or more current discharge curves; obtain a discharge temperature current parameter set according to the one or more current discharge curves; determine a discharge current coefficient through the discharge temperature current parameter set; and generate a target discharge curve according to the discharge current coefficient and the current discharge curve.

[0136] In one embodiment, the determination module 30 is further used to charge the target battery according to the current temperature within a first time period to obtain a target charging curve; calculate the second real-time voltage according to the target charging curve to obtain a current charging current threshold; when the second real-time current is less than the current charging current threshold, calculate a second corrected power SOC according to the second real-time voltage and the second real-time current, and correct the current power SOC by the second corrected power SOC.

[0137] In one embodiment, the determination module 30 is further used to charge the target battery according to the current temperature within a first time period to obtain one or more current charging curves; obtain a charging temperature and current parameter set according to the one or more current charging curves; determine a charging current coefficient through the charging temperature and current parameter set; and generate a target charging curve according to the charging current coefficient and the current charging curve.

[0138] In one embodiment, the correction module 40 is also used to calculate the first real-time current according to the target discharge curve to obtain a current discharge voltage threshold; when the first real-time voltage is less than the current discharge voltage threshold, calculate a first corrected power SOC according to the target voltage and target current; and correct the previous power SOC by using the first corrected power SOC.

[0139] In one embodiment, the correction module 40 is also used to determine that the current mode of the battery is a charging mode when the current power SOC is less than a preset power SOC threshold; charge the battery according to the charging mode to obtain a second real-time voltage and a second real-time current; calculate a second corrected power SOC according to the second real-time voltage and the second real-time current, and correct the current power SOC by the second corrected power SOC.

[0140] Other embodiments or implementation methods of the device for correcting misjudgment of battery power SOC of the present invention can refer to the above-mentioned method embodiments, which are not repeated here.

[0141] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0142] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0143] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, an integrated platform workstation, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0144] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for correcting misjudgment of battery power SOC, characterized in that: The method for correcting the battery SOC misjudgment comprises the following steps: Get the current voltage and current of the battery and the current state of the vehicle; Calculate the current charge SOC of the battery according to the current voltage, current current and current state; Determine a current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtain corresponding real-time voltage and real-time current according to the current mode; Calculate a target corrected power SOC according to the real-time voltage and the real-time current, and correct the current power SOC by the target corrected power SOC; The current mode includes a charging mode, the real-time voltage includes a second real-time voltage, the real-time current includes a second real-time current, and the target corrected SOC includes a second corrected SOC; The determining the current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtaining the corresponding real-time voltage and real-time current according to the current mode, includes: When the current power SOC is less than a preset power SOC threshold, determining that the current mode of the battery is a charging mode; Charging the battery according to the charging mode to obtain a second real-time voltage and a second real-time current; Accordingly, the calculating the target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC, includes: A second corrected electrical quantity SOC is calculated according to the second real-time voltage and the second real-time current, and the current electrical quantity SOC is corrected by the second corrected electrical quantity SOC.

2. The method for correcting a battery SOC misjudgment as claimed in claim 1, characterized in that: The current mode includes a discharge mode, the real-time voltage includes a first real-time voltage, the real-time current includes a first real-time current, and the target corrected SOC includes a first corrected SOC; The determining the current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtaining the corresponding real-time voltage and real-time current according to the current mode, includes: When the current power SOC is greater than a preset power SOC threshold, determining that the current mode of the battery is a discharge mode; Discharging the battery according to the discharge mode to obtain a first real-time voltage and a first real-time current; Accordingly, the calculating the target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC, includes: A first corrected electrical quantity SOC is calculated according to the first real-time voltage and the first real-time current, and the current electrical quantity SOC is corrected by the first corrected electrical quantity SOC.

3. The method for correcting the battery SOC misjudgment as claimed in claim 2, characterized in that: Before calculating a first corrected power SOC according to the first real-time voltage and the first real-time current and correcting the current power SOC by the first corrected power SOC, the method further includes: Get the current temperature of the target battery; Discharging the target battery according to the current temperature within a preset time period to obtain a target discharge curve; The step of calculating a first corrected electrical quantity SOC according to the first real-time voltage and the first real-time current according to the target discharge curve, and correcting the current electrical quantity SOC by the first corrected electrical quantity SOC.

4. The method for correcting a battery SOC misjudgment as claimed in claim 3, characterized in that: The discharging the target battery according to the current temperature within a preset time period to obtain a target discharge curve includes: Discharging the target battery according to the current temperature within a preset time period to obtain one or more current discharge curves; Obtaining a set of discharge temperature and current parameters according to the one or more current discharge curves; Determining a discharge current coefficient by using the discharge temperature and current parameter set; A target discharge curve is generated according to the discharge current coefficient and a current discharge curve.

5. The method for correcting the battery SOC misjudgment as claimed in claim 3, characterized in that: The step of calculating a first corrected power SOC according to the first real-time voltage and the first real-time current according to the target discharge curve, and correcting the current power SOC by the first corrected power SOC includes: Calculating the first real-time current according to the target discharge curve to obtain a current discharge voltage threshold; When the first real-time voltage is less than the current discharge voltage threshold, calculating a first corrected SOC according to a target voltage and a target current; The previous electrical quantity SOC is corrected by using the first corrected electrical quantity SOC.

6. The method for correcting a battery SOC misjudgment as claimed in claim 1, characterized in that: The calculating a second corrected power SOC according to the second real-time voltage and the second real-time current, and correcting the current power SOC by the second corrected power SOC, includes: Charging the target battery according to the current temperature in a first time period to obtain a target charging curve; Calculating the second real-time voltage according to the target charging curve to obtain a current charging current threshold; When the second real-time current is less than the current charging current threshold, a second corrected power SOC is calculated according to the second real-time voltage and the second real-time current, and the current power SOC is corrected by the second corrected power SOC.

7. The method for correcting a battery SOC misjudgment as claimed in claim 6, characterized in that: The step of charging the target battery according to the current temperature within the first time period to obtain a target charging curve includes: Charging the target battery according to the current temperature in a first time period to obtain one or more current charging curves; Obtaining a charging temperature and current parameter set according to the one or more current charging curves; Determine a charging current coefficient by using the charging temperature and current parameter set; A target charging curve is generated according to the charging current coefficient and the current charging curve.

8. The method for correcting a battery SOC misjudgment according to any one of claims 1 to 7, characterized in that: Before determining the current mode of the battery according to the current power SOC and the preset power SOC threshold, the method further includes: Obtain the vehicle's parking and discharging SOC change and starting power SOC; Obtaining a lower limit power SOC according to the stop-discharge power SOC change and the start-up power SOC; When the lower limit power SOC is less than the target power SOC threshold, determining whether the lower limit power SOC is greater than a preset depth of discharge power SOC; When the lower limit power SOC is greater than the preset depth of discharge power SOC, the preset power SOC threshold is determined according to the lower limit power SOC, the preset degradation power SOC and the preset depth of discharge power SOC.

9. A device for correcting misjudgment of battery SOC, characterized in that: The battery power SOC misjudgment correction device comprises: An acquisition module, used for acquiring the current voltage and current of the battery and the current state of the vehicle; A calculation module, used for calculating the current charge SOC of the battery according to the current voltage, current current and current state; A determination module, configured to determine a current mode of the battery according to the current power SOC and a preset power SOC threshold, and obtain corresponding real-time voltage and real-time current according to the current mode; A correction module, used for calculating a target corrected power SOC according to the real-time voltage and the real-time current, and correcting the current power SOC by the target corrected power SOC; The current mode includes a charging mode, the real-time voltage includes a second real-time voltage, the real-time current includes a second real-time current, and the target corrected power SOC includes a second corrected power SOC; the correction module is further used to determine that the current mode of the battery is a charging mode when the current power SOC is less than a preset power SOC threshold; and charge the battery according to the charging mode to obtain a second real-time voltage and a second real-time current; A second corrected electrical quantity SOC is calculated according to the second real-time voltage and the second real-time current, and the current electrical quantity SOC is corrected by the second corrected electrical quantity SOC.

10. A device for correcting misjudgment of battery power SOC, characterized in that: The battery power SOC misjudgment correction device includes: a memory, a processor, and a battery power SOC misjudgment correction program stored in the memory and executable on the processor, wherein the battery power SOC misjudgment correction program is configured to implement a battery power SOC misjudgment correction method as described in any one of claims 1 to 8.

11. A storage medium, characterized in that: The storage medium stores a correction program for battery power SOC misjudgment, and when the correction program for battery power SOC misjudgment is executed by the processor, a correction method for battery power SOC misjudgment as claimed in any one of claims 1 to 8 is implemented.

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