Vehicle battery SOC display processing method and device

Abstract

The invention discloses a vehicle battery SOC display processing method and device, and the method comprises the steps: judging whether the closing time from the last time of a battery system is greater than a set threshold value or not when the battery system is powered on, and executing an SOC jump solving strategy if the closing time from the last time of the battery system is greater than the set threshold value; if the SOC jump solving strategy is smaller than or equal to the set threshold value, skipping execution of the SOC jump solving strategy; charging and discharging tail end correction is carried out through the SOC jump solving strategy, an attenuation coefficient is introduced in the charging and discharging tail end correction process, and the cut-off amount of an attenuation compensation value is determined according to the battery system charging and discharging scheme and the SOC actual value; and calculating the displayed SOC value of the battery according to the actual SOC value of the battery, the observed SOC value of the battery, the attenuation coefficient and the cut-off amount of the attenuation compensation value. According to the method, the attenuation coefficient is introduced, and the difference between the observed value and the actual value is flattened by attenuation change in a period of time in the future, so that the condition of SOC numerical value jump is avoided, and the user experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle batteries, and in particular relates to a vehicle battery SOC display processing method and device. Background Art

[0002] The SOC displayed on electric vehicles is mainly related to the remaining power state of the battery. SOC, the full name of which is State of Charge, is the state of charge of the battery. It is an indicator of the remaining power of the battery.

[0003] The existing ampere-hour integration method based on OCV setting obtains the actual SOC of the battery by looking up the table after the battery has been stationary for a period of time. When displaying or restarting, there is no attenuation strategy for the SOC value, which causes the SOC value to jump when displayed in front of the user, affecting the user's experience. It is necessary to develop a vehicle battery SOC display processing technology solution. Summary of the invention

[0004] To this end, the present invention provides a vehicle battery SOC display processing method and device to solve the problem of SOC value display jumping in traditional technologies, which affects the user experience.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a vehicle battery SOC display processing method, comprising:

[0006] When the battery system is powered on, it is determined whether the time since the last shutdown of the battery system is greater than a set threshold. If the time since the last shutdown of the battery system is greater than the set threshold, the SOC jump solution strategy is executed; if the time since the last shutdown of the battery system is less than or equal to the set threshold, the execution of the SOC jump solution strategy is skipped;

[0007] Performing terminal charge and discharge correction through the SOC jump solution strategy, introducing an attenuation coefficient into the terminal charge and discharge correction process, and determining a cutoff amount of the attenuation compensation value according to the battery system charge and discharge scheme and the actual SOC value;

[0008] The displayed battery SOC value is calculated based on the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value.

[0009] As a preferred solution for the vehicle battery SOC display processing method, the SOC jump solution strategy adopts the ampere-hour integration method to perform charge and discharge terminal correction. During the charge and discharge terminal correction process, the SOC calculation formula of the battery system is:

[0010]

[0011] In the formula, SOC0 is the battery capacity at the initial state; I is the charge and discharge current; t is the charge and discharge time; Cn The rated capacity of the battery.

[0012] As a preferred solution for the vehicle battery SOC display processing method, during the charge and discharge terminal correction process:

[0013] The SOC observation value obtained when the battery system was last shut down is set as SOC1;

[0014] The actual SOC value of the battery system after standing is obtained through the SOC-OCV parameter table and is set as SOC2;

[0015] According to the SOC observation value SOC1 and the SOC actual value SOC2, the difference between the SOC observation value and the SOC actual value, i.e., SOC Δ1 =SOC1-SOC2.

[0016] As a preferred solution for the vehicle battery SOC display processing method, the SOC jump solution strategy is used to perform charge and discharge terminal correction, and the difference between the actual SOC value and the cutoff value is calculated:

[0017] SOC Δ2 =SOC2-SOC3

[0018] In the formula, SOC Δ2 is the difference between the actual SOC value and the cut-off value, and SOC3 is the battery capacity reached when the attenuation compensation value is cut off;

[0019] The formula for introducing the attenuation coefficient in the charge and discharge terminal correction process is:

[0020]

[0021] The formula for calculating the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff value of the attenuation compensation value is:

[0022]

[0023] Where K is the introduced attenuation coefficient.

[0024] As a preferred solution for the vehicle battery SOC display processing method, if the battery power of the battery system has reached the attenuation cutoff amount in the current operation process, the introduced attenuation coefficient K is corrected to 1;

[0025] If the battery system is in the current operation process and the battery power has not reached the attenuation cutoff amount, evaluate whether the next battery system startup time interval reaches the set threshold; if it reaches the set threshold, re-evaluate the size of the attenuation coefficient K; if it does not reach the set threshold, estimate the SOC according to the last attenuation coefficient K value.

[0026] The present invention also provides a vehicle battery SOC display processing device, comprising:

[0027] An SOC jump solution strategy execution analysis module is used to determine whether the time since the last shutdown of the battery system is greater than a set threshold when the battery system is powered on, and if the time since the last shutdown of the battery system is greater than the set threshold, the SOC jump solution strategy is executed; if the time since the last shutdown of the battery system is less than or equal to the set threshold, the execution of the SOC jump solution strategy is skipped;

[0028] An SOC jump solution strategy processing module, used to perform charge and discharge terminal correction through the SOC jump solution strategy, wherein the charge and discharge terminal correction process introduces an attenuation coefficient and determines a cutoff amount of an attenuation compensation value according to the battery system charge and discharge scheme and the actual SOC value;

[0029] The SOC calculation module is used to calculate the displayed battery SOC value according to the battery SOC actual value, the battery SOC observation value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value.

[0030] As a preferred solution of the vehicle battery SOC display processing device, in the SOC jump solution strategy processing module, the SOC jump solution strategy adopts the ampere-hour integration method to perform charge and discharge terminal correction. During the charge and discharge terminal correction process, the SOC calculation formula of the battery system is:

[0031]

[0032] In the formula, SOC0 is the battery capacity at the initial state; I is the charge and discharge current; t is the charge and discharge time; C n The rated capacity of the battery.

[0033] As a preferred solution for the vehicle battery SOC display processing device, in the SOC jump solution strategy processing module:

[0034] The SOC observation value obtained when the battery system was last shut down is set as SOC1;

[0035] The actual SOC value of the battery system after standing is obtained through the SOC-OCV parameter table and is set as SOC2;

[0036] According to the SOC observation value SOC1 and the SOC actual value SOC2, the difference between the SOC observation value and the SOC actual value, i.e., SOC Δ1 =SOC1-SOC2.

[0037] As a preferred solution of the vehicle battery SOC display processing device, in the SOC jump solution strategy processing module, the charge and discharge terminal correction is performed by the SOC jump solution strategy, and the difference between the actual SOC value and the cutoff value is calculated:

[0038] SOC Δ2 =SOC2-SOC3

[0039] In the formula, SOC Δ2 is the difference between the actual SOC value and the cut-off value, and SOC3 is the battery capacity reached when the attenuation compensation value is cut off;

[0040] In the SOC jump solution strategy processing module, the formula for introducing the attenuation coefficient in the charge and discharge terminal correction process is:

[0041]

[0042] In the SOC calculation module, the formula for calculating the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value is:

[0043]

[0044] Where K is the introduced attenuation coefficient.

[0045] As a preferred solution of the vehicle battery SOC display processing device, it also includes:

[0046] The attenuation coefficient update module is used to correct the introduced attenuation coefficient K to 1 if the battery power of the battery system has reached the attenuation cutoff in the current operation process; if the battery power of the battery system has not reached the attenuation cutoff in the current operation process; evaluate whether the next battery system startup time interval reaches the set threshold; if it reaches the set threshold, re-evaluate the size of the attenuation coefficient K; if it does not reach the set threshold, estimate the SOC according to the last attenuation coefficient K value.

[0047] The present invention has the following advantages: when the battery system is powered on, it is determined whether the time since the last shutdown of the battery system is greater than a set threshold. If the time since the last shutdown of the battery system is greater than the set threshold, the SOC jump solution strategy is executed; if it is less than or equal to the set threshold, the execution of the SOC jump solution strategy is skipped; the end-of-charge and discharge correction is performed through the SOC jump solution strategy, and the end-of-charge and discharge correction process introduces an attenuation coefficient, and the cutoff amount of the attenuation compensation value is determined according to the battery system charging and discharging scheme and the actual SOC value; the battery SOC value displayed is calculated according to the actual battery SOC value, the battery SOC observation value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value. The present invention introduces the attenuation coefficient to smooth the difference between the observed value and the actual value with the attenuation change in the future, so as to avoid the occurrence of SOC value jumps and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0049] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0050] Figure 1 A schematic flow chart of a vehicle battery SOC display processing method provided in an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of an SOC estimation model that introduces an attenuation coefficient compensation strategy provided in an embodiment of the present invention;

[0052] Figure 3 A schematic diagram of an SOC estimation model without introducing an attenuation coefficient compensation strategy provided in an embodiment of the present invention;

[0053] Figure 4 This is a diagram of a SOC estimation simulation interface that introduces an attenuation coefficient compensation strategy provided in an embodiment of the present invention;

[0054] Figure 5 This is a diagram of a SOC estimation simulation interface without introducing an attenuation coefficient compensation strategy provided in an embodiment of the present invention;

[0055] Figure 6 A diagram showing a comparison of SOC estimation interfaces with and without the introduction of an attenuation coefficient compensation strategy provided in an embodiment of the present invention;

[0056] Figure 7 Schematic diagram of the architecture of a vehicle battery SOC display processing device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Example 1

[0059] During the vehicle charging and discharging process, the dynamic and real-time SOC value is obtained by performing real-time integration calculations on the battery's charging and discharging current and time. At the same time, the ampere-hour integration method has high requirements on the acquisition accuracy and acquisition cycle of the current sensor, and if the electric vehicle is charged and discharged multiple times without full charge calibration, the single estimation errors are accumulated and displayed on the instrument. And when the battery is left for a long time, the battery's SOC will have errors due to the self-discharge characteristics of the battery. Therefore, an embodiment of the present invention provides a vehicle battery SOC display processing method, comprising the following steps:

[0060] S1. When the battery system is powered on, determine whether the time since the last shutdown of the battery system is greater than a set threshold. If the time since the last shutdown of the battery system is greater than the set threshold, execute the SOC jump solution strategy; if the time since the last shutdown of the battery system is less than or equal to the set threshold, skip the execution of the SOC jump solution strategy;

[0061] S2. Performing terminal charge and discharge correction by using the SOC jump solution strategy, introducing an attenuation coefficient into the terminal charge and discharge correction process, and determining a cutoff amount of the attenuation compensation value according to the battery system charge and discharge scheme and the actual SOC value;

[0062] S3. Calculate the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff value of the attenuation compensation value.

[0063] In this embodiment, in step S1, when the battery system is powered on again, it is determined whether the time T from the last battery system shutdown is greater than the set threshold value of 2h. If it is greater than the set threshold value of 2h, the SOC jump solution strategy is executed; if it is less than or equal to the set threshold value of 2h, the execution of the SOC jump solution strategy is skipped.

[0064] In this embodiment, in step S2, the SOC jump solution strategy uses the ampere-hour integration method to perform charge and discharge terminal correction. During the charge and discharge terminal correction process, the SOC calculation formula of the battery system is:

[0065]

[0066] In the formula, SOC0 is the battery capacity at the initial state; I is the charge and discharge current; t is the charge and discharge time; C n The rated capacity of the battery.

[0067] Among them, during the charge and discharge terminal correction process:

[0068] The SOC observation value obtained when the battery system was last shut down (i.e., the value displayed when the battery system was last shut down) is set as SOC1;

[0069] The actual SOC value of the battery system after standing is obtained through the SOC-OCV parameter table and is set as SOC2;

[0070] According to the SOC observation value SOC1 and the SOC actual value SOC2, the difference between the SOC observation value and the SOC actual value, i.e., SOC Δ1 =SOC1-SOC2.

[0071] In this embodiment, the cutoff value SOC3 of the attenuation compensation value is determined according to the battery system charge and discharge scheme and the actual SOC value. For example, if the charge and discharge interval is 20%-90% SOC; SOC1=90%; SOC2=85%, then SOCΔ1=5%, and SOC3 can be set to 70%. Then the SOC will reach a balance between the displayed value and the actual value at 70%, and the balanced SOC value shall not exceed the range of the charge and discharge interval.

[0072] Among them, the charge and discharge terminal correction is performed through the SOC jump solution strategy, and the difference between the actual SOC value and the cut-off value is calculated:

[0073] SOC Δ2 =SOC2-SOC3

[0074] In the formula, SOC Δ2 It is the difference between the actual SOC value and the cut-off value, and SOC3 is the battery capacity reached when the attenuation compensation value is cut off.

[0075] The formula for introducing the attenuation coefficient in the charge and discharge terminal correction process is:

[0076]

[0077] The formula for calculating the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff value of the attenuation compensation value is:

[0078]

[0079] Where K is the introduced attenuation coefficient.

[0080] In this embodiment, if the battery power of the battery system has reached the attenuation cutoff amount in the current operation process, the introduced attenuation coefficient K is corrected to 1;

[0081] If the battery system is in the current operation process and the battery power has not reached the attenuation cutoff amount, evaluate whether the next battery system startup time interval reaches the set threshold of 2h; if it reaches the set threshold of 2h, re-evaluate the size of the attenuation coefficient K; if it does not reach the set threshold of 2h, estimate the SOC according to the last attenuation coefficient K value.

[0082] The present invention provides the following examples:

[0083] See also Figure 2 This simulation takes the transition from 70% SOC to 60% SOC as an example, the cutoff value is 40% SOC, and the current is 1.35A constant current discharge. In the SOC estimation model that introduces the attenuation coefficient compensation strategy, the voltage value corresponding to 60% SOC is 3.322V according to the table lookup method. Assuming the attenuation cutoff capacity is 40%, then in this case SOC1 = 0.7; SOC2 = 0.6; SOC3 = 0.4, the simulation results are as follows Figure 4 As shown,

[0084] See also Figure 3 In the SOC estimation model without the attenuation coefficient compensation strategy, a signal generator is used to simulate the SOC jump from 70% to 60%. In the SOC estimation model with the attenuation coefficient compensation strategy, the simulation results are as follows: Figure 5 As shown, Figure 4 and Figure 5 The simulation results of Figure 6 As shown, it can be concluded that the SOC estimation model that introduces the attenuation coefficient compensation strategy has a smooth transition and no SOC jump occurs.

[0085] In summary, when the battery system is powered on, the present invention determines whether the time since the last shutdown of the battery system is greater than a set threshold. If the time since the last shutdown of the battery system is greater than the set threshold, the SOC jump solution strategy is executed; if it is less than or equal to the set threshold, the execution of the SOC jump solution strategy is skipped; the end-of-charge and discharge correction is performed through the SOC jump solution strategy, the end-of-charge and discharge correction process introduces an attenuation coefficient, and the cutoff amount of the attenuation compensation value is determined according to the battery system charge and discharge scheme and the actual SOC value; the displayed battery SOC value is calculated according to the actual battery SOC value, the battery SOC observation value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value. During the end-of-charge and discharge correction process: the SOC observation value obtained when the battery system was last shut down is set as SOC1; the actual SOC value of the battery system after standing is obtained through the SOC-OCV parameter table and set as SOC2; the difference between the SOC observation value and the SOC actual value is calculated according to the SOC observation value SOC1 and the SOC actual value SOC2. Among them, if the battery system is in the current operation process and the battery power has reached the attenuation cutoff, the introduced attenuation coefficient K is corrected to 1; if the battery system is in the current operation process and the battery power has not reached the attenuation cutoff; evaluate whether the next battery system startup time interval reaches the set threshold of 2h; if it reaches the set threshold of 2h, re-evaluate the size of the attenuation coefficient K, if it does not reach the set threshold of 2h, estimate the SOC according to the value of the last attenuation coefficient K. The present invention introduces the attenuation coefficient, and smoothes the difference between the observed value and the actual value with the attenuation change in the future period of time, so as to avoid the occurrence of SOC value jumps and improve the user experience.

[0086] It should be noted that the method of the embodiment of the present disclosure can be performed by a single device, such as a computer or a server. The method of the present embodiment can also be applied in a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present disclosure, and the multiple devices will interact with each other to complete the described method.

[0087] It should be noted that the above describes some embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0088] Example 2

[0089] See also Figure 7 Embodiment 2 of the present invention further provides a vehicle battery SOC display processing device, comprising:

[0090] The SOC jump solution strategy execution analysis module 100 is used to determine whether the time since the last shutdown of the battery system is greater than a set threshold when the battery system is powered on, and if the time since the last shutdown of the battery system is greater than the set threshold, execute the SOC jump solution strategy; if the time since the last shutdown of the battery system is less than or equal to the set threshold, skip the execution of the SOC jump solution strategy;

[0091] An SOC jump solution strategy processing module 200 is used to perform charge and discharge terminal correction through the SOC jump solution strategy, wherein the charge and discharge terminal correction process introduces an attenuation coefficient and determines a cutoff amount of an attenuation compensation value according to the battery system charge and discharge scheme and the actual SOC value;

[0092] The SOC calculation module 300 is used to calculate the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff value of the attenuation compensation value.

[0093] In this embodiment, in the SOC jump solution strategy processing module 200, the SOC jump solution strategy adopts the ampere-hour integration method to perform charge and discharge terminal correction. During the charge and discharge terminal correction process, the SOC calculation formula of the battery system is:

[0094]

[0095] In the formula, SOC0 is the battery capacity at the initial state; I is the charge and discharge current; t is the charge and discharge time; C n The rated capacity of the battery.

[0096] In this embodiment, in the SOC jump solution strategy processing module 200:

[0097] The SOC observation value obtained when the battery system was last shut down is set as SOC1;

[0098] The actual SOC value of the battery system after standing is obtained through the SOC-OCV parameter table and is set as SOC2;

[0099] According to the SOC observation value SOC1 and the SOC actual value SOC2, the difference between the SOC observation value and the SOC actual value, i.e., SOC Δ1 =SOC1-SOC2.

[0100] In this embodiment, in the SOC jump solution strategy processing module 200, the charge and discharge terminal correction is performed by the SOC jump solution strategy, and the difference between the actual SOC value and the cut-off value is calculated:

[0101] SOC Δ2 =SOC2-SOC3

[0102] In the formula, SOC Δ2 is the difference between the actual SOC value and the cut-off value, and SOC3 is the battery capacity reached when the attenuation compensation value is cut off;

[0103] In the SOC jump solution strategy processing module 200, the formula for introducing the attenuation coefficient in the charge and discharge terminal correction process is:

[0104]

[0105] In the SOC calculation module, the formula for calculating the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value is:

[0106]

[0107] Where K is the introduced attenuation coefficient.

[0108] In this embodiment, it also includes:

[0109] The attenuation coefficient update module 400 is used to correct the introduced attenuation coefficient K to 1 if the battery system is in the current operation process and the battery power has reached the attenuation cutoff amount; if the battery system is in the current operation process and the battery power has not reached the attenuation cutoff amount; evaluate whether the next battery system startup time interval reaches a set threshold; if it reaches the set threshold, re-evaluate the size of the attenuation coefficient K; if it does not reach the set threshold, estimate the SOC according to the last value of the attenuation coefficient K.

[0110] It should be noted that the information interaction, execution process and other contents between the modules of the above-mentioned device are based on the same concept as the method embodiment in Example 1 of the present application, and the technical effects they bring are the same as those of the method embodiment of the present application. For specific contents, please refer to the description in the method embodiment shown in the previous part of the present application, and will not be repeated here.

[0111] Example 3

[0112] Embodiment 3 of the present invention provides a non-transitory computer-readable storage medium, in which a program code of a vehicle battery SOC display processing method is stored. The program code includes instructions for executing the vehicle battery SOC display processing method of embodiment 1 or any possible implementation thereof.

[0113] The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0114] Example 4

[0115] Embodiment 4 of the present invention provides an electronic device, including: a memory and a processor;

[0116] The processor and the memory communicate with each other via a bus; the memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the vehicle battery SOC display processing method of embodiment 1 or any possible implementation thereof.

[0117] Specifically, the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor implemented by reading software codes stored in a memory. The memory can be integrated in the processor or can be located outside the processor and exist independently.

[0118] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.

[0119] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0120] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A vehicle battery SOC display processing method, characterized in that: include: When the battery system is powered on, it is determined whether the time since the last shutdown of the battery system is greater than a set threshold. If the time since the last shutdown of the battery system is greater than the set threshold, the SOC jump solution strategy is executed; if the time since the last shutdown of the battery system is less than or equal to the set threshold, the execution of the SOC jump solution strategy is skipped; Performing terminal charge and discharge correction through the SOC jump solution strategy, introducing an attenuation coefficient into the terminal charge and discharge correction process, and determining a cutoff amount of the attenuation compensation value according to the battery system charge and discharge scheme and the actual SOC value; The displayed battery SOC value is calculated based on the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value.

2. A vehicle battery SOC display processing method according to claim 1, characterized in that: The SOC jump solution strategy adopts the ampere-hour integration method to perform charge and discharge terminal correction. During the charge and discharge terminal correction process, the SOC calculation formula of the battery system is: In the formula, SOC0 is the battery capacity at the initial state; I is the charge and discharge current; t is the charge and discharge time; C n The rated capacity of the battery.

3. A vehicle battery SOC display processing method according to claim 2, characterized in that: During the end-of-charge and discharge correction process: The SOC observation value obtained when the battery system was last shut down is set as SOC1; The actual SOC value of the battery system after standing is obtained through the SOC-OCV parameter table and is set as SOC2; According to the SOC observation value SOC1 and the SOC actual value SOC2, the difference between the SOC observation value and the SOC actual value, i.e., SOC Δ1 =SOC1-SOC2.

4. A vehicle battery SOC display processing method according to claim 3, characterized in that: The SOC jump solution strategy is used to perform charge and discharge terminal correction, and the difference between the actual SOC value and the cutoff value is calculated: SOC Δ2 =SOC2-SOC3 In the formula, SOC Δ2 is the difference between the actual SOC value and the cut-off value, and SOC3 is the battery capacity reached when the attenuation compensation value is cut off; The formula for introducing the attenuation coefficient in the charge and discharge terminal correction process is: The formula for calculating the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff value of the attenuation compensation value is: Where K is the introduced attenuation coefficient.

5. The vehicle battery SOC display processing method according to claim 1, characterized in that: If the battery system has reached the attenuation cutoff value during the current operation process, the introduced attenuation coefficient K will be corrected to 1; If the battery system is in the current operation process and the battery power has not reached the attenuation cutoff value; evaluate whether the next battery system startup time interval reaches the set threshold; If the set threshold is reached, the attenuation coefficient K is re-evaluated; if the set threshold is not reached, the SOC is estimated according to the last value of the attenuation coefficient K.

6. A vehicle battery SOC display processing device, characterized in that: include: An SOC jump solution strategy execution analysis module is used to determine whether the time since the last shutdown of the battery system is greater than a set threshold when the battery system is powered on, and if the time since the last shutdown of the battery system is greater than the set threshold, the SOC jump solution strategy is executed; if the time since the last shutdown of the battery system is less than or equal to the set threshold, the execution of the SOC jump solution strategy is skipped; An SOC jump solution strategy processing module, used to perform charge and discharge terminal correction through the SOC jump solution strategy, wherein the charge and discharge terminal correction process introduces an attenuation coefficient and determines a cutoff amount of an attenuation compensation value according to the battery system charge and discharge scheme and the actual SOC value; The SOC calculation module is used to calculate the displayed battery SOC value according to the battery SOC actual value, the battery SOC observation value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value.

7. A vehicle battery SOC display processing device according to claim 6, characterized in that: In the SOC jump solution strategy processing module, the SOC jump solution strategy adopts the ampere-hour integration method to perform charge and discharge terminal correction. During the charge and discharge terminal correction process, the SOC calculation formula of the battery system is: In the formula, SOC0 is the battery capacity at the initial state; I is the charge and discharge current; t is the charge and discharge time; C n The rated capacity of the battery.

8. A vehicle battery SOC display processing device according to claim 7, characterized in that: In the SOC jump solution strategy processing module: The SOC observation value obtained when the battery system was last shut down is set as SOC1; The actual SOC value of the battery system after standing is obtained through the SOC-OCV parameter table and is set as SOC2; According to the SOC observation value SOC1 and the SOC actual value SOC2, the difference between the SOC observation value and the SOC actual value, i.e., SOC Δ1 =SOC1-SOC2.

9. A vehicle battery SOC display processing device according to claim 8, characterized in that: In the SOC jump solution strategy processing module, the charge and discharge terminal correction is performed through the SOC jump solution strategy, and the difference between the actual SOC value and the cut-off value is calculated: SOC Δ2 =SOC2-SOC3 In the formula, SOC Δ2 is the difference between the actual SOC value and the cut-off value, and SOC3 is the battery capacity reached when the attenuation compensation value is cut off; In the SOC jump solution strategy processing module, the formula for introducing the attenuation coefficient in the charge and discharge terminal correction process is: In the SOC calculation module, the formula for calculating the displayed battery SOC value according to the actual battery SOC value, the observed battery SOC value, the attenuation coefficient, and the cutoff amount of the attenuation compensation value is: Where K is the introduced attenuation coefficient.

10. The vehicle battery SOC display processing device according to claim 6, characterized in that: Also includes: The attenuation coefficient update module is used to correct the introduced attenuation coefficient K to 1 if the battery power of the battery system has reached the attenuation cutoff amount in the current operation process; if the battery power of the battery system has not reached the attenuation cutoff amount in the current operation process; evaluate whether the next battery system startup time interval reaches the set threshold; If the set threshold is reached, the attenuation coefficient K is re-evaluated; if the set threshold is not reached, the SOC is estimated according to the last value of the attenuation coefficient K.

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