Control method and system for SOC correction of power battery, vehicle and electronic equipment

Abstract

The invention relates to the technical field of charging, in particular to a power battery SOC correction control method and system, a vehicle and electronic equipment.The method comprises the steps that after the vehicle is normally powered on and enters a drivable state, the real SOCtar is calculated in real time; determining the state of a limit correction flag bit SOCmod according to the current battery state; based on the state of the limit correction flag bit SOCmod, the real SOCtar, the meter display SOCCdsp and the difference value between the real SOCtar and the meter display SOCCdsp, strategy decision making is carried out, if the decision making result is to execute power generation SOC correction, the range extender power generation power and the battery discharge power are controlled to achieve power generation SOC correction, and otherwise, SOC correction is carried out through a battery management system. According to the method, the problem that the change amplitude of the meter display SOC data is too large in a short time can be solved as far as possible.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to a control method, system, vehicle and electronic equipment for power battery SOC correction. Background Art

[0002] Among the power battery systems used in new energy vehicles, lithium iron phosphate (LiFePO4) batteries have been widely used in electric vehicles due to their excellent stability, good safety performance, and relatively low cost. However, the unique electrochemical properties of LiFePO4 batteries make accurate calculation of SOC (State of Charge) a challenging task. As a key parameter for measuring the remaining battery charge, the accuracy of SOC is crucial to the operation of electric vehicles. Accurate SOC estimation can provide users with a reliable range reference, helping them plan their trips appropriately and avoiding vehicle breakdowns caused by inaccurate charge estimates, which could disrupt travel plans. Furthermore, accurate SOC information can effectively prevent over-discharge and over-charging of the power battery, preserve the battery's chemical properties, extend battery life, and reduce user costs, playing a significant role in improving the driving experience, reliability, and safety of electric vehicles.

[0003] In actual use, due to various factors, the displayed SOC (battery state of charge) often deviates from the actual SOC. When this deviation reaches a certain level and requires correction, existing technologies have significant shortcomings. Currently, when performing SOC correction via the BMS, if the vehicle is continuously on power, the actual SOCtar will continue to slowly decrease due to the continued consumption of electricity. At the same time, because the displayed SOCdisp decreases at a faster rate than the actual SOCtar, the displayed SOCdisp approaches the actual SOCtar more quickly, resulting in a significant fluctuation in the displayed SOC data within a short period of time. This large fluctuation in the displayed SOC data within a short period of time can cause users to feel extremely confused and uneasy. It makes it difficult for users to accurately judge the vehicle's remaining range, leading to a strong sense of range anxiety. For example, a user may see the displayed SOCdisp showing 50% battery remaining and plan to travel to a distant destination. However, during the journey, the displayed SOCdisp suddenly drops to 20%. This can catch the user off guard, forcing them to change their itinerary and find a charging station, severely impacting their travel experience. On the other hand, excessively frequent SOC changes can cause users to seriously doubt the vehicle's performance and reliability. This can lead to users believing the vehicle has quality issues and increase concerns about mileage inflated claims.

[0004] Therefore, it is necessary to develop a new control method, system, vehicle and electronic equipment for power battery SOC correction. Summary of the Invention

[0005] The object of the present invention is to provide a control method, system, vehicle and electronic equipment for power battery SOC correction, which can solve the problem of excessive changes in displayed SOC data in a short period of time as much as possible.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, a control method for power battery SOC correction according to the present invention comprises the following steps:

[0008] After the vehicle is powered on normally and enters the drivable state, the real SOCtar is calculated in real time;

[0009] Determine the state of the limit correction flag SOCmod according to the current battery state;

[0010] Based on the status of the limit correction flag SOCmod, the actual SOCtar, the displayed SOCdisp, and the difference between the actual SOCtar and the displayed SOCdisp, a strategy decision is made. If the decision result is to perform power generation SOC correction, the range extender's power generation power and battery discharge power are controlled to achieve power generation SOC correction. Otherwise, SOC correction is performed through the battery management system.

[0011] Preferably, the limit correction flag SOCmod has a first state and a second state. The first state indicates that the correction is triggered at the end of discharge, while the second state indicates that the current SOC is in a safe state at the end of discharge. This provides a clear standard for adopting different control strategies according to different states.

[0012] Preferably, when the limit correction flag SOCmod is in the first state, the range extender is controlled to be forced to run, and whether the power generation SOC correction is performed is determined based on the actual SOCtar, the displayed SOCdisp, and the difference between the two. If so, the power generation power of the range extender and the battery discharge power are controlled; if not, the SOC correction is performed through the battery management system; at the end of battery discharge, when the SOC is close to being out of power, the forced operation of the range extender can utilize the power generation of the range extender to maintain the battery SOC, thereby avoiding excessive discharge of the battery, protecting the chemical properties of the battery, and extending the battery life;

[0013] When the limit correction flag SOCmod is in the second state, if the range extender is not in operation, the SOC correction is performed through the battery management system; if the range extender is in operation, the actual SOCtar, the displayed SOCdisp and the difference between the two are used to determine whether the power generation SOC correction is required. If so, the range extender power generation power and battery discharge power are controlled. If not, the battery management system performs the SOC correction. When the power generation SOC correction is met, the SOC is corrected by the range extender generating electricity to avoid a sudden and significant drop in the displayed SOC. When the power generation SOC correction is not met, the battery management system corrects the SOC according to the existing correction logic.

[0014] Preferably, the power generation power of the range extender is the product of the basic power generation power and the range-extended power generation power compensation coefficient;

[0015] There is a preset correspondence between the range extender power compensation coefficient, the actual SOCtar, and the difference between the actual SOCtar and the displayed SOCdisp. This design allows the range extender's power generation to be dynamically adjusted based on the battery's actual SOC and the displayed deviation.

[0016] Preferably, the battery discharge power is the product of the battery allowable discharge power and the battery discharge power limit coefficient;

[0017] There is a preset correspondence between the battery discharge power limit coefficient, the actual SOCtar, and the difference between the actual SOCtar and the displayed SOCdisp. In this way, the battery discharge power can be reasonably limited according to the actual SOC of the battery and the displayed deviation.

[0018] Preferably, during the control of the range extender power generation and battery discharge power, the SOC maintenance status is judged at every interval t1;

[0019] The SOC maintenance is determined by integrating the actual charge and discharge conditions of the power battery within time t1. This regular monitoring method allows real-time monitoring of SOC changes. If the SOC cannot be maintained, it indicates that there may be a problem with the current control strategy and timely adjustment is required. If the SOC can be maintained, control can continue according to the current strategy.

[0020] Preferably, the SOC maintenance condition is determined based on an integral calculation of the actual charge and discharge conditions of the power battery within time t1, specifically:

[0021] If the integral value is less than 0 within time t1, it indicates that the power battery is in a discharging state and the SOC cannot be maintained, then the SOC is corrected through the battery management system;

[0022] If the integral value is greater than or equal to 0 within time t1, the SOC can be maintained, and the power generation SOC correction is performed. Accurately determine the SOC maintenance status and achieve precise control.

[0023] In a second aspect, a control system for power battery SOC correction according to the present invention includes a battery management system and a vehicle controller;

[0024] The battery management system is used to calculate the real SOCtar in real time, and determine the state of the limit correction flag SOCmod according to the current battery state, and send the real SOCtar and the state of the limit correction flag SOCmod to the vehicle controller;

[0025] The vehicle controller is used to make a strategy decision after receiving the real SOCtar and the status of the limit correction flag SOCmod sent by the battery management system, and based on the status of the limit correction flag SOCmod, the real SOCtar, the displayed SOCdisp and the difference between the real SOCtar and the displayed SOCdisp. If the decision result is to perform power generation SOC correction, the power generation power of the range extender and the battery discharge power are controlled to achieve power generation SOC correction; otherwise, the battery management system is notified to perform SOC correction.

[0026] In a third aspect, a vehicle according to the present invention adopts the control system for power battery SOC correction according to the present invention.

[0027] In a fourth aspect, an electronic device described in the present invention includes a processor and a memory, wherein at least one computer program is stored in the memory. When the at least one computer program is loaded and executed by the processor, it can execute the steps of the control method for power battery SOC correction as described in the present invention.

[0028] The present invention has the following beneficial effects:

[0029] 1. Avoid user mileage anxiety and improve travel experience:

[0030] The present invention makes strategic decisions based on the state of the limit correction flag SOCmod, the actual SOCtar, the displayed SOCdisp, and the difference between the displayed SOCdisp and the actual SOCtar. When not necessary, the start timing of the range extender, the power generation power, and the battery discharge power limit are adjusted and controlled preferentially to achieve power generation SOC correction, that is, using the range extender to generate power to maintain SOC stability and avoid a sudden and substantial drop in the displayed SOC, thereby providing users with a relatively stable driving range reference, enabling users to accurately judge the remaining range of the vehicle, reasonably plan their itinerary, effectively alleviate mileage panic, and enhance the travel experience.

[0031] 2. Enhance users’ confidence in vehicle performance and reliability:

[0032] In the present invention, if the power generation SOC correction can be performed, it will be performed first. This can avoid frequent changes in the displayed SOC, make users more confident in the performance and reliability of the vehicle, and reduce concerns about false mileage.

[0033] 3. Protect battery performance and extend battery life:

[0034] Accurate SOC information is crucial for preventing over-discharge and over-charging of power batteries. The present invention dynamically adjusts the operation of the range extender and the discharge power of the battery by calculating the real SOCtar in real time and combining the state of the limit correction flag SOCmod and the difference between the displayed SOCdisp and the real SOCtar. At the end of discharge (the limit correction flag SOCmod is in the first state), the range extender is controlled to run forcibly and the range extender is used to generate electricity to maintain the battery SOC, avoiding over-discharge of the battery, thereby protecting the chemical properties of the battery, extending the battery life, and reducing the user's cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a flow chart of a control method for power battery SOC correction according to an embodiment of the present application;

[0036] Figure 2 is a flowchart of the execution steps of the control method for power battery SOC correction described in an embodiment of the present application;

[0037] Figure 3 This is a principle block diagram of the control system for power battery SOC correction described in the embodiment of the present application;

[0038] Figure 4 It is a principle block diagram of the electronic device described in the embodiment of this application.

[0039] In the figure: 1. Battery management system, 2. Vehicle controller, 3. Range extender, 4. Memory, 5. Processor. DETAILED DESCRIPTION

[0040] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will be able to understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for the purpose of illustrating the present invention and are not intended to limit the scope of protection of the present invention.

[0041] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0042] like Figure 1 As shown, in an embodiment of the present application, a control method for power battery SOC correction includes the following steps:

[0043] After the vehicle is powered on normally and enters the drivable state, the real SOCtar is calculated in real time.

[0044] The state of the limit correction flag SOCmod is determined according to the current battery state.

[0045] Based on the status of the limit correction flag SOCmod, the actual SOCtar, the displayed SOCdisp, and the difference between the actual SOCtar and the displayed SOCdisp, a strategy decision is made. If the decision result is to perform power generation SOC correction, the power generation power of the range extender 3 and the battery discharge power are controlled to achieve power generation SOC correction. Otherwise, SOC correction is performed through the battery management system 1.

[0046] In one possible embodiment, the limit correction flag SOCmod has a first state and a second state; the first state represents a correction triggered at the end of discharge, indicating that the current SOC is close to a dead state and needs to be charged immediately; the second state represents that the current SOC is in a safe state at the non-discharge end, that is, the SOC still has a certain margin from the dead state.

[0047] Exemplarily, when the limit correction flag SOCmod is set to "1", it indicates that the state of the limit correction flag SOCmod is the first state; when the limit correction flag SOCmod is set to "0", it indicates that the state of the limit correction flag SOCmod is the second state.

[0048] like Figure 2 As shown, in a possible embodiment, when the limit correction flag SOCmod is in the first state, the range extender 3 is controlled to be forced to run, and whether the power generation SOC correction is performed is determined based on the actual SOCtar, the displayed SOCdisp, and the difference between the two. If so, the power generation power of the range extender 3 and the battery discharge power are controlled. If not, the SOC correction is performed through the battery management system 1.

[0049] like Figure 2As shown, in a possible embodiment, when the limit correction flag SOCmod is in the second state, if the range extender 3 is in a non-operating state, the SOC correction is performed by the battery management system 1; if the range extender 3 is in an operating state, it is determined whether the power generation SOC correction is performed based on the actual SOCtar, the displayed SOCdisp, and the difference between the two. If so, the power generation power of the range extender 3 and the battery discharge power are controlled; if not, the SOC correction is performed by the battery management system 1.

[0050] Exemplarily, the preset correspondence between the SOC correction flag, the real SOCtar, and the difference between the real SOCtar and the displayed SOCdisp is shown in Table 1.

[0051] Table 1

[0052]

[0053] Difference 1 < Difference 2 < Difference 3, SOCtar1 > SOCtar2 > SOCtar3. For example, if the difference between the actual SOCtar and the displayed SOCdisp is Difference 1, and the actual SOCtar is SOCtar2, then the SOC correction flag is A2. A1-A9 can be 0 or 1 ("0" indicates power generation SOC correction, and "1" indicates SOC correction by the battery management system 1 (BMS)).

[0054] In a possible embodiment, the power generation power of the range extender 3 is the product of the basic power generation power and the extended-range power generation power compensation coefficient; there is a preset corresponding relationship between the extended-range power generation compensation coefficient, the real SOCtar, and the difference between the real SOCtar and the displayed SOCdisp, as shown in Table 2.

[0055] Table 2

[0056]

[0057] If the difference between the actual SOCtar and the displayed SOCdisp is 1, and the actual SOCtar is SOCtar2, the extended-range power compensation coefficient is B2; the value range of B1-B9 is 1-3, and the specific values ​​of B1 to B9 are obtained through calibration, where "1" represents a compensation coefficient of 1 and "3" represents a compensation coefficient of 3.

[0058] In a possible embodiment, the battery discharge power is the product of the battery allowable discharge power and the battery discharge power limit coefficient; there is a preset corresponding relationship between the battery discharge power limit coefficient, the actual SOCtar, and the difference between the actual SOCtar and the displayed SOCdisp.

[0059] Exemplarily, the preset correspondence between the battery discharge power limit coefficient, the actual SOCtar, and the difference between the actual SOCtar and the displayed SOCdisp is shown in Table 3.

[0060]

[0061] Table 3

[0062] For example, if the difference between the actual SOCtar and the displayed SOCdisp is 1, and the actual SOCtar is SOCtar2, then the battery discharge power limit coefficient is C2. The value range of C1-C9 is 0-1, and the specific values ​​of C1-C9 are obtained through calibration. Among them, "0" represents a limit coefficient of 0, and "1" represents a limit coefficient of 1.

[0063] In one possible embodiment, during the control of the range extender 3's power generation and battery discharge power, a SOC maintenance status judgment is performed at intervals of time t1, wherein the SOC maintenance judgment is based on an integral calculation of the actual charge and discharge status of the power battery within time t1. If the value of the integral calculation is less than 0 within time t1, it indicates that the power battery is in a discharge state and the SOC cannot be maintained. At this time, the vehicle controller 2 will send the SOC correction permission flag SOCallwd to the battery management system 1, indicating that the power generation SOC correction will not be performed. The battery management system 1 will automatically control it according to the battery status, that is, the SOC correction is performed by the battery management system 1 (this part belongs to the prior art and will not be repeated here). If the value of the integral calculation is greater than or equal to 0 within time t1, it indicates that the SOC can be maintained, that is, the power generation SOC correction can be performed. At this time, the power generation power of the range extender 3 and the battery discharge power limit control are performed based on the actual SOCtar, the displayed SOCdisp, and the difference between the two to achieve the power generation SOC correction.

[0064] like Figure 3As shown, in an embodiment of the present application, a control system for power battery SOC correction includes a battery management system 1 and a vehicle controller 2. The battery management system 1 is used to calculate the real SOCtar in real time, and determine the state of the limit correction flag SOCmod according to the current battery state, and send the real SOCtar and the state of the limit correction flag SOCmod to the vehicle controller 2. The vehicle controller 2 is used to make a strategy decision after receiving the real SOCtar and the state of the limit correction flag SOCmod sent by the battery management system 1, and based on the state of the limit correction flag SOCmod, the real SOCtar, the displayed SOCdisp and the difference between the real SOCtar and the displayed SOCdisp. If the decision result is to perform power generation SOC correction, the power generation power of the range extender 3 and the battery discharge power are controlled to achieve power generation SOC correction. Otherwise, the battery management system 1 is notified to perform SOC correction.

[0065] For example, the battery management system 1 calculates the real SOCtar in real time based on the current minimum battery cell voltage, battery temperature, and discharge current. The battery management system 1 sends the status of the limit correction flag SOCmod to the vehicle controller 2 based on the current battery status. The vehicle controller 2 receives the real SOCtar and the status of the limit correction flag SOCmod sent by the battery management system 1, and adjusts and controls the start timing of the range extender 3, the power generation power of the range extender 3, and the battery discharge power limit based on the difference between the real SOCtar and the displayed SOCdisp, and feeds back the SOC correction flag SOCallwd to the battery management system 1. The vehicle controller 2 records the charge and discharge status of the power battery in real time, and feeds back to the battery management system 1 whether the power battery correction flag is allowed.

[0066] It should be noted that, whether implementing a power generation SOC correction strategy or performing SOC correction operations through the battery management system (BMS), both the actual SOCtar and the displayed SOCdisp are in dynamic flux. The dynamic changes in the actual SOCtar are due to changes in the vehicle's power usage, specifically during the charging or discharging process. When the vehicle is charging, energy is continuously input into the power battery, causing the actual SOCtar to rise. Conversely, when the vehicle is discharging, such as when the motor consumes energy while driving, the actual SOCtar decreases. The dynamic changes in the displayed SOCdisp are primarily due to adjustments to the mapping relationship. This mapping relationship is based on changes in the actual SOCtar and incorporates factors such as SOC correction. As the actual SOCtar fluctuates and the correction strategy is implemented, the displayed SOCdisp changes accordingly to reflect the current state of charge of the power battery as displayed on the vehicle's instrument cluster. In the power generation SOC correction scenario, when the displayed SOCdisp exceeds the actual SOCtar, the system will take measures to increase power generation. This allows the actual SOCtar to rise at a faster rate, gradually approaching the displayed SOCdisp. During this process, both the real SOCtar and the displayed SOCdisp show an upward trend, but because the rising rate of the real SOCtar is faster, the gap between the two will gradually narrow, and eventually the real SOCtar and the displayed SOCdisp will converge. When the SOC is corrected through the BMS, if the vehicle is continuously in a power-consuming state, the real SOCtar will continue to slowly decrease due to the continuous consumption of electric energy. At the same time, since the decrease rate of the displayed SOCdisp is greater than the decrease rate of the real SOCtar, the displayed SOCdisp will approach the real SOCtar more quickly, that is, the change amplitude of the displayed SOC data in a short period of time is too large. The present invention can solve the problem of excessive change amplitude of the displayed SOC data in a short period of time as much as possible by adding a power generation SOC correction strategy.

[0067] In an embodiment of the present application, a vehicle adopts a control system for power battery SOC correction as described in the embodiment of the present application. The vehicle is a range-extended electric vehicle (REEV).

[0068] like Figure 4 As shown, in an embodiment of the present application, an electronic device includes a processor 5 and a memory 4, and the memory 4 stores at least one computer program. When the at least one computer program is loaded and executed by the processor 5, it can implement the steps of the control method for power battery SOC correction provided in the embodiment of the present application.

[0069] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor 5 of the electronic device, the various processes of the above-mentioned method embodiment are implemented and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0070] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete the full classification or partial functions described above.

[0071] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A control method for power battery SOC correction, characterized in that: The following steps are involved: After the vehicle is powered on normally and enters the drivable state, the real SOCtar is calculated in real time; Determine the state of the limit correction flag SOCmod according to the current battery state; Based on the state of the limit correction flag SOCmod, the real SOCtar, the displayed SOCdisp, and the difference between the real SOCtar and the displayed SOCdisp, a strategy decision is made. If the decision result is to perform power generation SOC correction, the power generation power of the range extender (3) and the battery discharge power are controlled to achieve power generation SOC correction. Otherwise, SOC correction is performed through the battery management system (1).

2. The control method for power battery SOC correction according to claim 1, characterized in that: The limit correction flag SOCmod has a first state and a second state; the first state represents a correction triggered at the end of discharge; the second state represents that the current SOC is in a safe state at the non-discharge end.

3. The control method for power battery SOC correction according to claim 1, characterized in that: When the limit correction flag SOCmod is in the first state, the range extender (3) is controlled to run compulsorily, and whether the power generation SOC correction is performed is determined based on the real SOCtar, the displayed SOCdisp, and the difference between the two. If so, the power generation power of the range extender (3) and the battery discharge power are controlled. If not, the SOC correction is performed through the battery management system (1); When the limit correction flag SOCmod is in the second state, if the range extender (3) is in a non-operating state, the SOC correction is performed through the battery management system (1); if the range extender (3) is in an operating state, it is determined whether the power generation SOC correction is performed based on the real SOCtar, the displayed SOCdisp and the difference between the two. If so, the power generation power of the range extender (3) and the battery discharge power are controlled. If not, the SOC correction is performed through the battery management system (1).

4. The control method for power battery SOC correction according to claim 3, characterized in that: The power generation power of the range extender (3) is the product of the basic power generation power and the range-extended power generation power compensation coefficient; There is a preset corresponding relationship between the extended-range power generation compensation coefficient, the actual SOCtar, and the difference between the actual SOCtar and the displayed SOCdisp.

5. The control method for power battery SOC correction according to claim 3, characterized in that: The battery discharge power is the product of the battery allowable discharge power and the battery discharge power limit coefficient; There is a preset corresponding relationship between the battery discharge power limit coefficient, the actual SOCtar, and the difference between the actual SOCtar and the displayed SOCdisp.

6. The control method for power battery SOC correction according to claim 3, characterized in that: During the control of the range extender (3) power generation and the battery discharge power, the SOC maintenance status is judged at each interval t1; The SOC maintenance condition is determined based on an integration operation of the actual charge and discharge conditions of the power battery within time t1.

7. The control method for power battery SOC correction according to claim 6, characterized in that: The SOC maintenance condition is determined by performing an integral calculation on the actual charge and discharge conditions of the power battery within time t1, specifically: If the value of the integral operation is less than 0 within time t1, it indicates that the power battery is in a discharge state and the SOC cannot be maintained, and the SOC is corrected through the battery management system (1); If the value of the integral operation is greater than or equal to 0 during time t1, it indicates that the SOC can be maintained, and the power generation SOC correction is performed.

8. A control system for power battery SOC correction, characterized in that: It includes a battery management system (1) and a vehicle controller (2); The battery management system (1) is used to calculate the real SOCtar in real time, determine the state of the limit correction flag SOCmod according to the current battery state, and send the real SOCtar and the state of the limit correction flag SOCmod to the vehicle controller (2); The vehicle controller (2) is used to make a strategy decision after receiving the real SOCtar and the state of the limit correction flag SOCmod sent by the battery management system (1), and based on the state of the limit correction flag SOCmod, the real SOCtar, the displayed SOCdisp and the difference between the real SOCtar and the displayed SOCdisp. If the decision result is to perform power generation SOC correction, the power generation power of the range extender (3) and the battery discharge power are controlled to achieve power generation SOC correction. Otherwise, the battery management system (1) is notified to perform SOC correction.

9. A vehicle, characterized in that: A control system for power battery SOC correction as described in claim 8 is adopted.

10. An electronic device, characterized in that: The invention comprises a processor (5) and a memory (4), wherein the memory (4) stores at least one computer program, and when the at least one computer program is loaded and executed by the processor (5), the steps of the control method for power battery SOC correction according to any one of claims 1 to 7 can be executed.

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