An energy storage pre-charge and discharge method and system triggered based on vehicle start-stop events

Abstract

The application discloses a kind of energy storage pre-charge-discharge methods and systems based on vehicle start-stop event trigger, system includes: start-stop state acquisition module, start-stop event stability judging module, start-stop phase determination module, pre-charge-discharge control module, unstable start-stop statistics and adjustment module;At system architecture level, through the cooperative cooperation of start-stop state acquisition, start-stop event stability judging, start-stop phase determination, pre-charge-discharge control and unstable start-stop statistics and adjustment and other functional modules, vehicle start-stop event identification, stability confirmation and energy storage pre-charge-discharge control form complete closed-loop processing procedure, so that energy storage system has higher control pertinence and operating stability in vehicle starting and parking process, reduce invalid or false triggering pre-charge-discharge operation, improve overall energy management effect under vehicle start-stop operating condition.

Description

Technical Field

[0001] This invention relates to the field of vehicle battery management technology, and in particular to a method and system for energy storage pre-charge and discharge based on vehicle start-stop events. Background Technology

[0002] With the application of new energy vehicles and vehicles with electrification features, vehicles are typically equipped with energy storage systems to power the power system and onboard electrical equipment. During vehicle startup and shutdown, these energy storage systems need to perform corresponding charging and discharging controls based on changes in the vehicle's state to meet the vehicle's electrical needs.

[0003] In existing technologies, vehicle start-stop status is typically identified through start-stop related status signals. When a vehicle is detected to be in a start-up or stop-down state, the energy storage system performs corresponding charging and discharging operations based on these signals. However, in actual operation, the vehicle's start-stop status is not always stable and clear; it may be triggered briefly, interrupted, or fail to complete the start-stop action altogether. For example, a start command may be canceled, or the vehicle may restart immediately after a brief stop. In such cases, if the energy storage system still immediately performs charging and discharging control based on the start-stop related status signals, it may trigger unnecessary energy storage charging and discharging operations before the vehicle's start-stop event has stabilized, resulting in energy loss or placing an additional burden on the energy storage system.

[0004] Therefore, the existing technology lacks a method and system that can determine the stability of vehicle start-stop events and perform corresponding charging and discharging control on the energy storage system after the vehicle start-stop events are confirmed to be stable. Summary of the Invention

[0005] The purpose of this invention is to provide an energy storage pre-charge and discharge method based on vehicle start-stop events, which has the advantage of being able to judge the stability of vehicle start-stop events and then perform corresponding charge and discharge control on the energy storage system after the vehicle start-stop events are confirmed to be stable.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] A method for pre-charging and discharging energy storage based on vehicle start-stop events includes the following steps:

[0008] Acquire start-stop related status signals to characterize the vehicle's start-up or stop-up status;

[0009] Within a preset time window, the consistency of the start-stop related status signals is judged to determine whether the vehicle start-stop event has reached a stable state.

[0010] When the vehicle start-stop event is determined to have reached a stable state, depending on whether the vehicle start-stop event is a start event or a stop event, the corresponding pre-charge control or pre-discharge control is triggered on the energy storage system.

[0011] When the vehicle start-stop event has not reached a stable state, the pre-charge-discharge control is not executed, or the pre-charge-discharge control is executed with a control strength lower than that in the stable state.

[0012] Further configuration: The determination of the consistency of the start / stop related status signals includes:

[0013] Within the preset time window, the start-stop related status signals are continuously acquired, and it is determined whether the start-stop related status signals consistently represent the same vehicle start-stop state throughout the entire preset time window.

[0014] The vehicle start-stop event is determined to have reached a stable state only if the start-stop related status signal does not undergo a state change opposite to the current start-stop state within the preset time window.

[0015] By adopting the above technical solution, and by requiring the start-stop related status signals to continuously represent the same vehicle start-stop state throughout the entire preset time window, it is possible to effectively avoid misjudgment problems caused by short-term jitter, instantaneous false triggering, or repeated state changes of the start-stop signal. This ensures that the vehicle start-stop event is only confirmed when the state is continuously stable, thereby reducing the probability of triggering energy storage pre-charge and discharge control before the start-stop event has stabilized, and improving the reliability and accuracy of energy storage control decisions.

[0016] Further configuration: The start-stop related status signals include at least two signals used to characterize the vehicle start-stop status, and the at least two signals have different sources or different characterization focuses;

[0017] The state consistency judgment further includes: within the preset time window, determining whether the at least two start-stop related state signals jointly represent the vehicle start state or the vehicle stop state within the same time period; and determining that the vehicle start-stop event has reached a stable state only when the start-stop states represented by the at least two start-stop related state signals are consistent within the preset time window.

[0018] By adopting the above technical solution and introducing at least two start-stop related state signals and judging their consistency, the risk of misjudgment caused by a single signal due to abnormal acquisition, communication delay or short-term fluctuation can be reduced. The stability confirmation of vehicle start-stop events is based on the consistency of multiple source states, thereby improving the reliability of start-stop event judgment results, further reducing unnecessary energy storage pre-charge and discharge operations, and enhancing the robustness of the system under complex operating conditions.

[0019] Further configuration: The determination of the consistency of at least two start-stop related state signals includes:

[0020] Within the preset time window, the time changes of the at least two start-stop related state signals are detected, and it is determined whether there is a continuous time interval within the preset time window. Within this time interval, the at least two start-stop related state signals jointly represent the vehicle start state or the vehicle stop state. When the duration of the continuous time interval reaches the preset minimum duration requirement, it is determined that the vehicle start-stop event has reached a stable state.

[0021] By adopting the above technical solution, and introducing a time overlap consistency judgment method among multiple start-stop related state signals, the stability confirmation of vehicle start-stop events no longer depends on the complete synchronization of multiple signals throughout the entire time window, but is based on their common consistency state within the critical time interval. This allows for tolerance of time differences in the acquisition, transmission, or response of different start-stop related state signals, improving the adaptability and reliability of start-stop event stability judgment in actual operating environments, reducing misjudgments caused by signal delays or short-term inconsistencies, and further reducing the possibility of energy storage pre-charge and discharge control being falsely triggered.

[0022] Further configuration: When determining whether the continuous time interval exists within the preset time window, the determination is further made based on the position of the continuous time interval in the time evolution of the vehicle start-stop event. Only when the continuous time interval is located in the continuous phase of the vehicle start-stop event is it determined that the vehicle start-stop event has reached a stable state.

[0023] The duration of the vehicle start-stop event is the time period during the vehicle start-up or stop process, after the start-stop related status signal has completed its initial change and before it enters the reverse change.

[0024] By adopting the above technical solution, based on judging whether there is a continuous time interval within the preset time window, and further combining the position of the continuous time interval in the time evolution process of the vehicle start-stop event, the vehicle start-stop event is determined to have reached a stable state only when the continuous time interval is located in the continuous stage of the vehicle start-stop event. This can avoid misjudging the brief, consistent overlapping intervals that appear in the initial or final stage of the vehicle start-stop event as a stable start-stop event.

[0025] Therefore, the stability confirmation of vehicle start-stop events is based not only on the temporal consistency of various start-stop related state signals, but also on their stage attributes during the start-stop process. This improves the accuracy of the stability judgment of start-stop events, reduces the occurrence of energy storage pre-charge and discharge control being triggered before the vehicle start-stop has entered a stable execution stage, and helps to reduce the ineffective energy regulation caused by false triggering.

[0026] Further configuration: After the vehicle start-stop event reaches a stable state, differentiated pre-charge and discharge control is performed on the energy storage system according to the type of the start-stop event, wherein:

[0027] When the start-stop event is a vehicle start-up event, pre-charging control is executed with the goal of meeting the power demand during the vehicle start-up phase, so as to improve the energy supply capacity of the energy storage system during the start-up phase.

[0028] When the start-stop event is a vehicle stop event, pre-discharge control is performed with the aim of reducing load fluctuations in the energy storage system.

[0029] By adopting the above technical solution, and by distinguishing between vehicle start-up events and vehicle stop events after the start-stop event is stably confirmed, and by performing targeted pre-charging or pre-discharging control respectively, the energy storage system can undertake a more matched energy regulation function in different start-stop phases. This improves the targeting of energy dispatch during start-stop phases, reduces the transient impact on the energy storage system during start-up or shutdown, and enhances the overall energy management effect.

[0030] Another object of the present invention is to provide an energy storage pre-charge and discharge system triggered by a vehicle start-stop event, the system comprising:

[0031] The start-stop status acquisition module is used to acquire start-stop related status signals that characterize the vehicle's start-up or stop-down status.

[0032] The start-stop event stability assessment module is used to continuously assess the start-stop related state signals within a preset time window to determine whether the vehicle start-stop event has reached a stable state.

[0033] The start-stop event stability judgment module is configured to: perform state consistency judgment on at least two start-stop related state signals, and determine whether there is a continuous time interval within the preset time window, in which the at least two start-stop related state signals jointly represent the vehicle start state or the vehicle stop state.

[0034] The start-stop phase determination module is used to further determine the position of the continuous time interval in the time evolution process of the vehicle start-stop event when the continuous time interval is detected, and to determine that the vehicle start-stop event has reached a stable state when the continuous time interval is in the continuous phase of the vehicle start-stop event.

[0035] The pre-charge and discharge control module is used to perform corresponding pre-charge control or pre-discharge control on the energy storage system when the vehicle start-stop event reaches a stable state, depending on whether the vehicle start-stop event is a start event or a stop event, and to restrict the execution of the pre-charge and discharge control when the vehicle start-stop event has not reached a stable state.

[0036] The unstable start-stop statistics and adjustment module is used to count the occurrence of vehicle start-stop events that have not reached a stable state within a preset statistical period, and to adjust the duration of the preset time window and / or the execution frequency of the pre-charge and discharge control based on the time distribution characteristics of the start-stop events that have not reached a stable state within the preset statistical period.

[0037] Further configuration: It also includes a start / stop judgment execution qualification determination unit. The start / stop judgment execution qualification determination unit is used to determine whether the start / stop event has the engineering execution qualification to trigger the pre-charge and discharge operation after the start / stop event is determined to have reached a stable state, in combination with the current execution boundary state of the energy storage system. Only when the start / stop event simultaneously meets the start / stop stability condition and the execution boundary constraint condition of the energy storage system will the qualification determination result allowing the execution of the pre-charge and discharge operation be output to the pre-charge and discharge control module.

[0038] By adopting the above technical solution, and introducing a start-stop judgment execution qualification determination unit between the start-stop event stability judgment and the pre-charge-discharge control, it is possible to avoid triggering the pre-charge-discharge operation when the energy storage system is not suitable for participating in energy regulation. Even if the start-stop event itself has been determined to be in a stable state, the system will still perform secondary screening based on the current execution boundary state of the energy storage system (such as the allowed operating range, load capacity, etc.), and will only allow the pre-charge-discharge to be triggered when the energy storage system has the execution conditions, thereby avoiding invalid or high-risk operations caused by mismatch in energy storage state.

[0039] Furthermore, this qualification determination does not occur during the ex-post protection phase of energy storage control or battery management, but rather serves as a pre-constraint in the start-stop triggering chain, enabling the safety boundary of the energy storage system to directly participate in the execution decision of start-stop events, thereby reducing the potential risks brought about by the frequent participation of energy storage in start-stop regulation from the system structure perspective.

[0040] Meanwhile, the system no longer simply treats the start-stop stability judgment result as a directly executable instruction. Instead, it transforms the judgment result into an intermediate result of whether the engineering execution conditions are met through execution qualification determination, thereby improving the robustness of the system under real vehicle operating conditions.

[0041] Further configuration: The start / stop judgment execution qualification determination unit also includes an execution qualification validity period management subunit. The execution qualification validity period management subunit is used to set a corresponding valid duration for the execution qualification when the start / stop event is granted execution qualification, and to automatically invalidate the execution qualification if the valid duration is exceeded and no pre-charge / discharge operation is triggered.

[0042] By adopting the above technical solution and setting up an execution qualification validity period management subunit, it is possible to prevent the energy storage pre-charge and discharge operation from being triggered based on the expired start-stop judgment result. When the start-stop event is granted execution qualification but fails to trigger pre-charge and discharge within a reasonable time, the system avoids executing the original energy storage operation when the vehicle operating condition has changed through the automatic expiration mechanism of the execution qualification validity period, thereby reducing the risk of false triggering.

[0043] At the same time, it can enhance the system's ability to constrain the timeliness of start and stop judgments; start and stop events themselves are highly time-sensitive, and this validity period management mechanism enables the system to explicitly constrain the usage time limit of the judgment results;

[0044] Furthermore, it can reduce the cumulative logical error of the system under complex operating conditions. In cases of delayed execution, resource occupation, or multiple tasks running in parallel, the automatic qualification invalidation mechanism can prevent the system from accumulating unexecuted start-stop judgment results over a long period of time, thereby preventing the logical state from gradually deviating from the actual operating state of the vehicle.

[0045] In traditional systems, when execution conditions are not met temporarily, the process is often handled by waiting or delaying execution. However, this approach implicitly assumes that the judgment result remains valid during the delay period.

[0046] This solution introduces a validity period management mechanism for execution qualifications, treating start-up and shutdown judgment results as a system resource with a lifecycle, clarifying its effective boundaries from the system operation and management level, thereby avoiding the problem of historical judgment results remaining in the system.

[0047] Further configuration: The start / stop judgment execution qualification determination unit also includes an execution qualification failure type sub-unit. The execution qualification failure type sub-unit is used to distinguish and identify the reasons for not granting execution qualification when the start / stop event execution qualification is not granted, and output the distinguished failure type information to the system's adjustment or protection module to trigger system-level response behavior corresponding to different failure types.

[0048] The reasons include at least one or more of the following: insufficient start-stop stability conditions, failure to meet the execution boundaries of the energy storage system, and expiration of the execution qualification validity period.

[0049] By adopting the above technical solution and setting up a sub-unit for the execution qualification failure type area, the interpretability and manageability of the system for the reasons for non-execution are improved. When a start-stop event is not granted execution qualification, the system can distinguish between different reasons such as insufficient start-stop stability, failure to meet the execution boundary of the energy storage system, or invalidation of the execution qualification, thereby avoiding simply treating all non-execution situations as the same type of anomaly.

[0050] At the same time, it provides clear triggering basis for system-level adjustment or protection strategies. Different types of execution qualification failures correspond to different system meanings. By distinguishing and identifying failure types, the system can have a clear basis for subsequent response actions such as adjustment, freezing, delay or degradation, thereby improving the pertinence of the overall control strategy.

[0051] Furthermore, it enhances the system's self-management capabilities during long-term operation. During long-term operation, the system can identify potential sources of problems based on the distribution of failure types, such as frequent insufficiency of judgment logic or long-term limitation of energy storage boundaries, thereby providing a basis for system parameter optimization or maintenance strategies.

[0052] In summary, the present invention has the following beneficial effects:

[0053] The energy storage pre-charge and discharge method based on vehicle start-stop event triggering proposed in this invention first collects vehicle start-stop related state signals and uses them to construct the basis for judging start-stop events. On this basis, the continuity and consistency of start-stop related state signals are judged within a preset time window. The method also combines the temporal overlap of multiple start-stop related state signals and their stage position in the temporal evolution of the vehicle start-stop event to confirm whether the vehicle start-stop event has reached a stable state. This transforms the identification of start-stop events from being triggered by a single signal to a comprehensive judgment based on multiple signals, time dimension, and stage attributes.

[0054] Based on the aforementioned stability confirmation mechanism, this method only triggers the corresponding energy storage pre-charging or pre-discharging control after the vehicle start-stop event is confirmed to have reached a stable state. Furthermore, it restricts the execution of pre-charging and discharging control before the vehicle start-stop event has reached a stable state, thereby avoiding unnecessary energy regulation operations before the start-stop event has actually entered the execution phase. This allows the energy storage pre-charging and discharging control to more accurately match the actual evolution of the vehicle start-stop process.

[0055] Furthermore, by statistically analyzing the occurrence of vehicle start-stop events that have not reached a stable state within a preset statistical period, and combining the time distribution characteristics of these start-stop events within the statistical period, the duration of the preset time window and the execution frequency of pre-charge and discharge control are dynamically adjusted. This method can not only make judgments on single start-stop events, but also adapt to different types of unstable start-stop behaviors at the system operation level, avoiding repeated energy regulation by the energy storage system under frequent or abnormal start-stop conditions.

[0056] Combining the above methods and steps, at the system architecture level, through the coordinated operation of functional modules such as start-stop status acquisition, start-stop event stability judgment, start-stop stage determination, pre-charge and discharge control, and unstable start-stop statistics and adjustment, a complete closed-loop processing flow is formed for vehicle start-stop event identification, stability confirmation, and energy storage pre-charge and discharge control. This enables the energy storage system to have higher control targeting and operational stability during vehicle start-up and shutdown, reduces invalid or falsely triggered pre-charge and discharge operations, and improves the overall energy management effect under vehicle start-stop conditions. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the system architecture of an embodiment. Detailed Implementation

[0058] The present invention will be further described in detail below with reference to the accompanying drawings.

[0059] Example:

[0060] This embodiment provides an energy storage pre-charge and discharge system based on vehicle start-stop events (such as...). Figure 1 As shown in the image, this system is applied in vehicle energy management scenarios to control the pre-charging or pre-discharging behavior of the energy storage system during vehicle startup or parking. This system can be deployed within the vehicle controller, energy management controller, or control unit that communicates with them.

[0061] This system includes: a start / stop status acquisition module, a start / stop event stability judgment module, a start / stop phase judgment module, a pre-charge / discharge control module, and an unstable start / stop statistics and adjustment module. The modules interact with each other via an internal bus or an onboard communication network.

[0062] The start-stop status acquisition module is used to acquire start-stop related status signals that characterize the vehicle's start-up or stop-down status.

[0063] In this embodiment, the start-stop related status signals may include one or more of the following: ignition or start request signal, powertrain ready signal, motor speed change signal, and brake pedal status signal.

[0064] The various start-stop related status signals are used to reflect the vehicle's operating status during the stages of start preparation, start execution, stop preparation, or stop completion.

[0065] The start / stop status acquisition module synchronously collects and processes start / stop related status signals from different sources to provide basic data for subsequent start / stop event judgment, but does not limit the specific signal type or sampling method.

[0066] The start-stop event stability assessment module is used to perform consistency and continuity analysis on various start-stop related state signals within a certain observation time range in order to determine whether the vehicle start-stop event has a stability basis.

[0067] During system operation, for each start / stop related state signal involved in the judgment, at the sampling time... Determine whether it represents the target start-stop state (vehicle start state or vehicle stop state) and generate the corresponding consistency indicator, which is defined as follows:

[0068] ;

[0069] in, Where k is the number of start / stop related status signals involved in the consistency judgment.

[0070] Based on this, define a multi-signal consistency determination quantity:

[0071] ;

[0072] The multi-signal consistency determination quantity is defined as follows: All start / stop related state signals involved in the determination represent the same target start / stop state at the same sampling time. =1.

[0073] Within the observation time range, the start / stop event stability judgment module determines the consistency of multiple signals. Continuous testing is conducted.

[0074] Assume the system sampling period is And preset the minimum duration requirement as The corresponding minimum number of consecutive sampling points is:

[0075] ;

[0076] When in succession The following condition is met at each sampling time: At that time, the start / stop event stability judgment module determines that there is a continuous and consistent overlapping interval within the observation time range.

[0077] Through the aforementioned continuous overlapping consistent interval identification mechanism, the system avoids the situation where the stability of the start-stop event is confirmed based solely on a single sampling moment or a brief period of consistent state.

[0078] The start-stop phase determination module is used to further determine the position of the overlapping and consistent interval in the time evolution of the vehicle start-stop event after detecting the continuous overlapping and consistent interval.

[0079] In this embodiment, the start / stop phase determination module determines the phase by analyzing the changes in start / stop related state signals before and after the overlapping and consistent interval.

[0080] If a change in a start-stop related status signal from a non-target start-stop state to a target start-stop state is detected before the overlapping and consistent interval, and no immediate reverse change in the start-stop related status signal is detected after the overlapping and consistent interval, then the overlapping and consistent interval is considered to be in the continuous phase of the vehicle start-stop event.

[0081] The start-stop phase determination module only confirms that the vehicle start-stop event has reached a stable state when the above conditions are met.

[0082] The pre-charge / discharge control module is used to perform pre-charge or pre-discharge control on the energy storage system based on the output results of the start-stop event stability judgment module and the start-stop phase judgment module.

[0083] When the system confirms that the vehicle start-stop event has reached a stable state:

[0084] If the start-stop event is a vehicle start event, the pre-charge / discharge control module controls the energy storage system to perform a pre-charge operation;

[0085] If the start-stop event is a vehicle parking event, the pre-charge-discharge control module controls the energy storage system to perform a pre-discharge operation.

[0086] When the vehicle start-stop event has not yet reached a stable state, the pre-charge and discharge control module restricts the execution of pre-charge and discharge operations, for example by reducing the execution intensity, delaying the execution timing, or only performing part of the pre-charge and discharge operations.

[0087] The unstable start-stop statistics and adjustment module is used to record and statistically analyze vehicle start-stop events that have not reached a stable state within a preset statistical period.

[0088] The system records the occurrence time of unstable start-stop events and analyzes the time distribution characteristics of unstable start-stop events within the statistical period based on the time interval between adjacent unstable start-stop events, in order to distinguish whether the unstable start-stop events occur in a concentrated manner or intermittently.

[0089] When a concentrated occurrence is determined, the system adjusts by extending the observation time range of start-stop events and / or reducing the execution frequency of pre-charge and discharge control;

[0090] When an intermittent event is determined to occur, the system adjusts by either keeping the observation time range of start / stop events unchanged and reducing the execution frequency, or by simply extending the observation time range of start / stop events.

[0091] This embodiment introduces a multi-signal consistency judgment and continuous overlapping consistency interval identification algorithm into the start-stop event stability judgment module, so that the stability judgment of vehicle start-stop events is based on the continuous consistency of multi-source state signals in the time dimension; and combined with the start-stop stage judgment module and the unstable start-stop statistical adjustment module, the energy storage pre-charge and discharge control can be matched with the actual evolution process of vehicle start-stop events, thereby improving the control reliability and engineering feasibility of the system in vehicle start-stop scenarios.

[0092] Based on the aforementioned energy storage pre-charge and discharge system triggered by vehicle start-stop events, the specific structure and working method of the start-stop judgment execution qualification determination unit set in the system are further explained.

[0093] The start-stop judgment execution qualification determination unit is located between the start-stop event stability determination module and the pre-charge-discharge control module. It is used to perform engineering-level execution qualification management on start-stop events that have been determined to be stable, thereby determining whether and under what conditions the start-stop event allows the pre-charge-discharge operation of the energy storage system to be triggered.

[0094] By introducing this start / stop judgment execution qualification determination unit, the system adds an independent system-level constraint structure between the start / stop judgment result and the energy storage action execution, so that the start / stop judgment result is no longer directly equivalent to the executable instruction, but must be subject to execution qualification determination before it can enter the energy storage control stage.

[0095] In this embodiment, the start / stop judgment execution qualification determination unit includes at least the following functional sub-units:

[0096] The qualification determination subunit is used to determine whether start-up and shutdown events are qualified for engineering execution by combining the execution boundary state of the energy storage system.

[0097] The execution qualification validity period management subunit is used to manage the time validity of granted execution qualifications;

[0098] The execution qualification failure type sub-unit is used to distinguish the reasons when execution qualification is not granted or lost.

[0099] The aforementioned sub-units can be implemented in the form of hardware logic, software modules, or a combination of hardware and software, and can be integrated and deployed in the vehicle controller or energy management controller.

[0100] In this embodiment, the qualification determination subunit acquires multiple operating state parameters of the energy storage system to construct a set of energy storage execution boundary states for qualification determination, which can be represented as:

[0101] ;

[0102] in:

[0103] : Current state of charge of the energy storage system;

[0104] : Current operating temperature of the energy storage system;

[0105] The equivalent number of charge-discharge cycles within a preset time range;

[0106] The maximum allowable precharge or pre-discharge power limit.

[0107] The above parameters are used to describe whether the energy storage system has the engineering conditions to participate in pre-charge and discharge operations under the current operating state.

[0108] Once the start / stop event has been determined to be in a stable state, the execution eligibility determination subunit evaluates its execution eligibility based on the following determination model:

[0109] ;

[0110] in:

[0111] The result of the qualification determination for the start-stop event;

[0112] : The charge range that allows participation in pre-charge and discharge;

[0113] : The temperature range within which pre-charge and discharge are permitted;

[0114] Charge-discharge cycle threshold;

[0115] The expected pre-charge or pre-discharge power requirement corresponding to the current start-stop event.

[0116] when At that time, the start-stop event is determined to be qualified for engineering execution under the current energy storage execution boundary conditions.

[0117] In this embodiment, even if the start / stop event is determined to be eligible for execution by the execution eligibility determination subunit, the execution eligibility is not permanently valid.

[0118] Therefore, the execution qualification validity period management subunit in the start / stop judgment execution qualification determination unit is used to set the corresponding validity period for the granted execution qualification, and its validity can be expressed as:

[0119] ;

[0120] in:

[0121] The moment when the qualification is granted;

[0122] The effective duration of the qualification;

[0123] : The validity indicator of the qualification at the current moment.

[0124] When an execution qualification exceeds its effective duration and no pre-charge / discharge operation is triggered, the execution qualification validity management subunit automatically invalidates the execution qualification.

[0125] In this embodiment, when a start / stop event is not granted execution eligibility, or when an already granted execution eligibility is revoked due to expiration, the execution eligibility failure type sub-unit in the start / stop judgment execution eligibility determination unit distinguishes and identifies the reasons for not granting execution eligibility.

[0126] The failure types include at least the following categories:

[0127] Insufficient start-stop stability conditions;

[0128] Energy storage execution boundary not satisfied;

[0129] The qualification has expired.

[0130] The execution qualification failure type sub-unit outputs the corresponding failure type information to the system's regulation module or protection module to trigger system-level response behaviors corresponding to different failure types.

[0131] By uniformly setting up a start / stop judgment and execution eligibility determination unit in the system, and integrating execution eligibility determination, validity period management, and failure type differentiation functions within this unit, the following was achieved:

[0132] Introduce an independent engineering execution qualification management layer between start-stop judgment and energy storage operations;

[0133] Move the physical execution boundary of the energy storage system to the start / stop trigger link;

[0134] Prevent energy storage pre-charge and discharge from being triggered based on start / stop judgment results that are outdated or incompatible;

[0135] Improve the interpretability and manageability of the system in non-executable states.

[0136] As an independent functional unit in the system structure, the start-stop judgment execution qualification determination unit enables the energy storage pre-charge and discharge system to have higher engineering safety, operational stability and long-term maintainability under complex start-stop conditions.

[0137] This embodiment also provides a pre-charge / discharge method for energy storage triggered by vehicle start-stop events, which is executed based on the aforementioned system. This method is used to control the pre-charge or pre-discharge behavior of the energy storage system during vehicle start-up or parking.

[0138] During vehicle operation, when a start-stop event (starting or stopping) is detected, the system triggers the method described in this embodiment.

[0139] The specific steps include: acquiring start-stop related status signals, judging the stability of vehicle start-stop events, triggering corresponding pre-charge and discharge control after the start-stop event reaches a stable state, and restricting the execution of pre-charge and discharge control when the start-stop event has not reached a stable state.

[0140] After detecting a vehicle start-stop event, start-stop related status signals are continuously acquired within a preset observation time range, and it is determined whether the start-stop related status signals continuously represent the same vehicle start-stop state within the observation time range.

[0141] If, within the observation time range, the start-stop related status signals do not show a change opposite to the current start-stop status, the vehicle start-stop event is considered to have a preliminary stability basis in the time dimension.

[0142] While performing the above preliminary stability assessment, a consistency assessment is made on the start-stop related state signals based on at least two start-stop related state signals used to characterize the vehicle start-stop state.

[0143] The subsequent stability confirmation process will only proceed when at least two start-stop related state signals jointly characterize either a vehicle start-up state or a vehicle stop-up state within the observation time range, thereby avoiding misjudgment caused by a single abnormal signal.

[0144] After completing the consistency judgment of multiple start-stop related state signals, it is further determined within the observation time range whether there is a continuous time interval in which the at least two start-stop related state signals continuously and jointly represent the vehicle start state or the vehicle stop state.

[0145] When the continuous time interval meets the preset minimum duration requirement, the vehicle start-stop event is considered to meet the stability condition in terms of time continuity.

[0146] After identifying the continuous time interval, the judgment is further made based on the position of the continuous time interval in the time evolution of the vehicle start-stop event.

[0147] The vehicle start-stop event is confirmed to have reached a stable state only when the continuous time interval is located in the continuous phase of the vehicle start-stop event, that is, when the start-stop related state signal has completed the initial change and has not yet entered the reverse change phase. This avoids misjudging the brief consistent state that occurs in the initial or final phase of the start-stop event as a stable start-stop event.

[0148] Once the vehicle start-stop event is confirmed to have reached a stable state, the corresponding pre-charge / discharge control is executed according to the type of the start-stop event.

[0149] When the start-stop event is a vehicle start-up event, the energy storage system is controlled to perform a pre-charging operation to meet the power demand during the vehicle start-up phase.

[0150] When the start-stop event is a vehicle parking event, the control energy storage system performs a pre-discharge operation to mitigate load fluctuations during the vehicle parking phase.

[0151] When the vehicle start-stop event has not reached a stable state, the complete pre-charge and discharge control is not executed directly, but the execution of the pre-charge and discharge control is restricted.

[0152] The restrictions include, but are not limited to: reducing the intensity of pre-charge and discharge operations, delaying the timing of pre-charge and discharge operations, or performing only partial pre-charge and discharge operations, in order to reduce the impact on the energy storage system when the start-stop state is unstable.

[0153] Within a preset statistical period, the occurrence of vehicle start-stop events that have not reached a stable state is recorded and statistically analyzed.

[0154] When the number of start-stop events that have not reached a stable state exceeds a preset threshold, the duration of the observation time range used for start-stop stability judgment is adjusted, and / or the execution frequency of pre-charge and discharge control is adjusted, so as to reduce the number of times the energy storage system participates in energy regulation under frequent unstable start-stop scenarios.

[0155] Based on the above statistical processing, the temporal distribution characteristics of the start-stop events that have not reached a stable state within the statistical period are further analyzed.

[0156] When the start-stop events that have not reached a stable state exhibit a concentrated distribution, adjustment is made by extending the duration of the observation time range and / or reducing the execution frequency of the pre-charge-discharge control.

[0157] When the start-stop events that have not reached a stable state exhibit an intermittent distribution, adjustments can be made by keeping the observation time range unchanged and reducing the execution frequency of pre-charge and discharge control, or by simply extending the observation time range.

[0158] The method described in this embodiment forms a complete processing flow for the identification of start-stop events, stability confirmation, and energy storage pre-charge and discharge control during vehicle start-stop. This enables the pre-charge and discharge behavior of the energy storage system to match the actual evolution of vehicle start-stop events, thereby reducing invalid or falsely triggered pre-charge and discharge operations caused by unstable start-stop states and improving the stability and reliability of energy storage system control under vehicle start-stop conditions.

[0159] Specifically, the application scenario will be illustrated using new energy vehicles operating on urban roads.

[0160] These types of vehicles frequently experience start-stop events in the following scenarios:

[0161] Starting and stopping at traffic light intersections in the city;

[0162] Traffic was congested and stop-and-go.

[0163] Underground parking lot entrance and exit, ramp start and stop;

[0164] The driver repeatedly started, stopped, or shifted gears within a short period of time.

[0165] In the above scenarios, vehicle start-stop events are characterized by frequency, short duration, and recurrence. If energy storage pre-charge and discharge are triggered based solely on a single start-stop signal, it can easily lead to frequent charging and discharging of the energy storage system, large energy fluctuations, and even affect the system's lifespan.

[0166] In this embodiment, the following three start-stop related status signals are selected as the judgment criteria:

[0167] Start request signal: triggered by the driver pressing the ignition or start button;

[0168] Power system ready signal: indicates that the electric drive system has entered a state where it can output power;

[0169] Motor speed signal: used to reflect whether the vehicle has truly entered the start-up execution phase.

[0170] Among them, the start request signal and the power system ready signal are used to characterize driving intention and system response;

[0171] The motor speed signal is used to avoid the false alarm that "a request has been sent but the motor has not actually started".

[0172] Only when at least two of the above signals jointly characterize a startup state or a shutdown state within the same time period will the subsequent stability judgment process begin.

[0173] Experimental statistics under urban road conditions revealed that:

[0174] The duration of the start-stop signal caused by accidental activation or brief pause by the driver is usually less than 0.5 seconds;

[0175] The signal duration for an actual effective start / stop action is typically greater than 1 second.

[0176] Therefore, in this embodiment, the following settings are made:

[0177] Observation time range: 2.0 seconds;

[0178] Minimum duration requirement: 1.0 second.

[0179] Within this observation time range, the system continuously detects whether there is a continuous time interval of no less than 1.0 second for start-stop related status signals. Within this time interval, multiple start-stop related status signals collectively represent the vehicle start state or the vehicle stop state.

[0180] This parameter setting can effectively filter out "pseudo-start / stop" caused by short-term jitter or erroneous operation.

[0181] After identifying consecutive overlapping and consistent intervals that meet the minimum duration requirement, the system further determines the position of that time interval in the vehicle start-stop event.

[0182] Taking vehicle starting as an example:

[0183] Start-stop related status signals typically experience brief fluctuations during the initial startup phase;

[0184] Once the vehicle enters the actual start-up and execution phase, the relevant signals tend to stabilize.

[0185] If the driver cancels the start or brakes immediately, the signal will quickly reverse.

[0186] Therefore, in this embodiment, the system requires:

[0187] The consecutive overlapping and consistent intervals must be located after the start signal has completed its initial change;

[0188] Furthermore, no change opposite to the startup state should be detected for a short period after this interval.

[0189] Only when the above conditions are met can it be confirmed that the vehicle start-stop event has reached a stable state.

[0190] In this embodiment, the energy storage system is an on-board energy storage unit, and its pre-charge and discharge parameters are set as follows (example):

[0191] Pre-charge power: 3–5kW;

[0192] Pre-discharge power: 2–4kW;

[0193] Precharge / discharge duration: 0.5–2 seconds.

[0194] Once the vehicle start-up event is confirmed to have reached a stable state, the system controls the energy storage system to perform a pre-charging operation to provide auxiliary energy for the vehicle's start-up phase.

[0195] Once the vehicle parking event is confirmed to have reached a stable state, the system controls the energy storage system to perform a pre-discharge operation to mitigate energy recovery or load fluctuations.

[0196] When vehicle start-stop events have not yet reached a stable state, such as when frequent start-stop events occur in congested areas, the system does not perform full pre-charge / discharge control, but instead adopts the following restricted execution strategy:

[0197] Limit the pre-charge and discharge power to 30%–50% of the rated value;

[0198] Alternatively, a delay of 0.5–1.0 seconds may be used to determine whether to perform a pre-charge / discharge cycle.

[0199] Or perform only one short pre-charge / discharge operation.

[0200] The above methods can prevent the energy storage system from frequently operating when its start-up and shutdown are uncertain.

[0201] In this embodiment, the system uses 60 seconds as a statistical period. If the number of start-stop events that fail to reach a stable state exceeds 5 within 60 seconds, it is considered that the current working condition is abnormal or there is frequent unstable start-stop behavior.

[0202] The system further analyzes the temporal distribution of these unstable start-up and shutdown events:

[0203] If most events occur within a short period of time (e.g., multiple occurrences within 10 seconds), they are considered to have occurred in a concentrated manner; if events occur sporadically throughout the entire statistical period, they are considered to have occurred intermittently.

[0204] For different distribution characteristics:

[0205] Concentrated occurrence: Extend the observation time range to 3.0 seconds and reduce the pre-charge / discharge execution frequency;

[0206] Intermittent occurrence: Keep the observation time range unchanged, only reduce the execution frequency.

[0207] Using the above methods, under the actual working conditions of frequent starts and stops on urban roads:

[0208] The system can distinguish between genuine and valid start / stop actions and brief accidental touches;

[0209] To avoid the energy storage system frequently pre-charging and discharging when it "fakes start" or "fakes stops" at traffic lights;

[0210] This makes the pre-charging and discharging behavior of energy storage more closely match the actual start-stop rhythm of the vehicle.

[0211] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. An energy storage pre-charge and discharge system triggered by vehicle start-stop events, characterized in that, include: The start-stop status acquisition module is used to acquire start-stop related status signals that characterize the vehicle's start-up or stop-down status. The start-stop event stability judgment module is used to continuously judge the start-stop related state signals within a preset time window to determine whether the vehicle start-stop event has reached a stable state. The start-stop event stability judgment module is configured to: perform state consistency judgment on at least two start-stop related state signals, and determine whether there is a continuous time interval within the preset time window, in which the at least two start-stop related state signals jointly represent the vehicle start state or the vehicle stop state. The start-stop phase determination module is used to further determine the position of the continuous time interval in the time evolution process of the vehicle start-stop event when the continuous time interval is detected, and to determine that the vehicle start-stop event has reached a stable state when the continuous time interval is in the continuous phase of the vehicle start-stop event. The pre-charge and discharge control module is used to perform corresponding pre-charge control or pre-discharge control on the energy storage system according to whether the vehicle start-stop event is a start event or a stop event, and to restrict the execution of the pre-charge and discharge control when the vehicle start-stop event has not reached a stable state; The unstable start-stop statistics and adjustment module is used to count the occurrence of vehicle start-stop events that have not reached a stable state within a preset statistical period, and to adjust the duration of the preset time window or the execution frequency of the pre-charge and discharge control based on the time distribution characteristics of the start-stop events that have not reached a stable state within the preset statistical period. The system records the occurrence time of unstable start-stop events and analyzes the time distribution characteristics of unstable start-stop events within the statistical period based on the time interval between adjacent unstable start-stop events, in order to distinguish whether the unstable start-stop events occur in a concentrated manner or intermittently. When a concentrated occurrence is determined, the system adjusts by extending the observation time range of start-stop events and / or reducing the execution frequency of pre-charge and discharge control; When an intermittent event is determined to occur, the system maintains the observation time range for start and stop events unchanged and reduces the execution frequency. The start-stop judgment execution qualification determination unit is located between the start-stop event stability judgment module and the pre-charge-discharge control module. It is used to perform engineering-level execution qualification management on start-stop events that have been determined to be stable, thereby determining whether the start-stop event is allowed to trigger the pre-charge-discharge operation of the energy storage system. The start / stop judgment execution qualification determination unit includes: The execution qualification determination subunit is used to determine whether the start-stop event has the engineering execution qualification to trigger the pre-charge and discharge operation after the start-stop event is determined to have reached a stable state, in combination with the current execution boundary state of the energy storage system. Only when the start-stop event simultaneously meets the start-stop stability condition and the execution boundary constraint condition of the energy storage system will the qualification determination result allowing the pre-charge and discharge operation be output to the pre-charge and discharge control module. The execution qualification validity period management subunit is used to set a corresponding valid duration for the execution qualification when the start-stop event is granted the execution qualification, and to automatically invalidate the execution qualification if the valid duration is exceeded and no pre-charge-discharge operation is triggered. The execution qualification failure type sub-unit is used to distinguish and identify the reasons for not being granted execution qualification or having the granted execution qualification revoked due to expiration when the start-stop event is not granted execution qualification or is revoked due to expiration. The distinguished failure type information is then output to the system's adjustment module or protection module to trigger system-level response behaviors corresponding to different failure types. The reasons mentioned include at least one of the following: insufficient start-stop stability conditions, failure to meet the execution boundaries of the energy storage system, or expiration of the execution qualification validity period.

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