Power battery system health state estimation method, device, equipment, medium and program product

Abstract

The invention discloses a power battery system health state estimation method, device and equipment, a medium and a program product, and relates to the technical field of new energy automobiles. The method comprises the steps that in the real-time running process of a vehicle, the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and real-time environment parameters in the real-time running process of the vehicle are obtained; determining an actual influence factor according to the real-time environment parameters; calculating the real-time equivalent throughput of the battery according to the actual influence factors of the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the real-time environmental parameters on the cycle life of the battery; determining an actual residual power percentage and an actual residual capacity percentage corresponding to the real-time equivalent throughput of the battery; and detecting the health state of the battery according to the actual residual power percentage and the actual residual capacity percentage. According to the technical scheme of the embodiment of the invention, real-time high-precision state monitoring of the health state of the power battery system is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, and particularly relates to a power battery system health state estimation method, device, equipment, medium and program product. BACKGROUND

[0002] The health state (SOH) of a power battery system is an important indicator for measuring the performance degradation degree of the power battery system, and plays an irreplaceable role in the whole life cycle management, safe use and industry development of the power battery system. The power battery system may have performance degradation due to internal chemical reaction, overheating, overcharging and overdischarging and other factors during long-term use, and even cause internal short circuit, thermal runaway and other safety problems, which is the basic data for ensuring safe operation of the battery and preventing safety accidents. According to the SOH evaluation result, the charging and discharging strategy of the battery can be dynamically adjusted to avoid overuse of unhealthy batteries and reduce safety hazards from the source. The SOH data is generally expressed by the percentage of the current capacity of the battery to the rated capacity or the internal resistance growth rate, which can directly reflect the remaining service life of the battery and quantify the degree of battery degradation. Accurate SOH data provides a quantitative standard for the value evaluation of battery step utilization, helps to establish a reasonable transaction price system, and promotes the standardized development of the power battery system recycling industry.

[0003] The traditional SOH evaluation often needs to perform charging and discharging cycles under high-precision equipment when monitoring and evaluating the battery capacity, internal resistance, voltage and the like of the power battery system, and cannot realize real-time high-precision state monitoring. SUMMARY

[0004] The present application provides a power battery system health state estimation method, device, equipment, medium and program product, which realizes real-time high-precision state monitoring of the health state of the power battery system.

[0005] According to an aspect of the present application, a power battery system health state estimation method is provided, which comprises:

[0006] During real-time operation of the vehicle, the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the real-time environmental parameters during real-time operation of the vehicle are acquired;

[0007] According to the real-time environmental parameters, the actual influence factor of the real-time environmental parameters on the cycle life of the battery is determined;

[0008] According to the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the actual influence factor of the real-time environmental parameters on the cycle life of the battery, the real-time equivalent throughput of the battery is calculated;

[0009] query the battery test throughput corresponding to the battery real-time equivalent throughput, and determine the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput;

[0010] detect the battery health state according to the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput.

[0011] According to another aspect of the present application, a power battery system health state estimation device is provided, which comprises:

[0012] a real-time running process data acquisition module, configured to acquire the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and the real-time environmental parameter in the real-time running process of the vehicle during the real-time running process of the vehicle;

[0013] an actual influence factor determination module, configured to determine the actual influence factor of the real-time environmental parameter on the battery cycle life according to the real-time environmental parameter;

[0014] a battery real-time equivalent throughput calculation module, configured to calculate the battery real-time equivalent throughput according to the battery real-time voltage, the actual influence factor of the real-time environmental parameter on the battery cycle life, the battery real-time charging current and the battery real-time discharging current;

[0015] an actual residual percentage determination module, configured to query the battery test throughput corresponding to the battery real-time equivalent throughput, and determine the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput;

[0016] a battery health state detection module, configured to detect the battery health state according to the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput.

[0017] According to another aspect of the present application, an electronic device is provided, which comprises:

[0018] at least one processor; and

[0019] a memory connected with the at least one processor in communication; wherein,

[0020] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the power battery system health state estimation method according to any one of the embodiments of the present application.

[0021] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for causing a processor to implement the method for estimating the state of health of a power battery system according to any of the embodiments of the present application when executed by the processor.

[0022] According to another aspect of the present application, there is provided a computer program product comprising a computer program for implementing the method for estimating the state of health of a power battery system according to any of the embodiments of the present application when executed by a processor.

[0023] The technical scheme of the embodiment of the present application, by acquiring the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the real-time environmental parameters in the real-time running process of the vehicle, determining the actual influence factor of the real-time environmental parameters on the cycle life of the battery according to the real-time environmental parameters, calculating the real-time equivalent throughput of the battery according to the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the actual influence factor of the real-time environmental parameters on the cycle life of the battery, querying the battery test throughput corresponding to the real-time equivalent throughput of the battery, and determining the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput, detecting the state of health of the battery according to the actual residual power percentage and the actual residual capacity percentage corresponding to the real-time equivalent throughput of the battery, without the need for special high-precision test equipment, solves the problem that the traditional SOH evaluation cannot realize real-time high-precision state monitoring of the power battery system, and realizes real-time high-precision state monitoring of the state of health of the power battery system based on the pre-determined battery test throughput of the power battery system and comprehensive consideration of the real-time environmental parameters in the real-time running process of the vehicle, with the advantages of high accuracy, data visualization and guidance for battery optimization.

[0024] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a flowchart of a method for estimating the state of health of a power battery system according to an embodiment of the present application;

[0027] The technical scheme of the embodiment of the present application, by acquiring the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the real-time environmental parameters in the real-time running process of the vehicle, determining the actual influence factor of the real-time environmental parameters on the cycle life of the battery according to the real-time environmental parameters, calculating the real-time equivalent throughput of the battery according to the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the actual influence factor of the real-time environmental parameters on the cycle life of the battery, querying the battery test throughput corresponding to the real-time equivalent throughput of the battery, and determining the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput, detecting the state of health of the battery according to the actual residual power percentage and the actual residual capacity percentage corresponding to the real-time equivalent throughput of the battery, without the need for special high-precision test equipment, solves the problem that the traditional SOH evaluation cannot realize real-time high-precision state monitoring of the power battery system, and realizes real-time high-precision state monitoring of the state of health of the power battery system based on the pre-determined battery test throughput of the power battery system and comprehensive consideration of the real-time environmental parameters in the real-time running process of the vehicle, with the advantages of high accuracy, data visualization and guidance for battery optimization.Figure 2 is a flow chart of a power battery system health state estimation method according to the second embodiment of the present application;

[0028] Figure 3 is a flow chart of a power battery system health state estimation method according to the second embodiment of the present application;

[0029] Figure 4 is a structural schematic diagram of a power battery system health state estimation device according to the third embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of an electronic device implementing the power battery system health state estimation method according to the embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. All other embodiments obtained by the personnel in the technical field without creative labor based on the embodiments in the present application shall belong to the protection scope of the present application.

[0032] It should be noted that the terms “first”, “second” and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment One

[0034] Figure 1 is a flow chart of a power battery system health state estimation method according to the first embodiment of the present application. The embodiments of the present application can be applicable to the case of real-time estimation of the health state of the power battery system. The method can be executed by a power battery system health state estimation device, which can be realized in the form of hardware and / or software, and can be configured in an electronic device bearing the power battery system health state estimation function.

[0035] Referring to Figure 1 The power battery system health state estimation method shown in the embodiment comprises:

[0036] S101, in the real-time running process of the vehicle, acquiring the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the real-time environmental parameter in the real-time running process of the vehicle.

[0037] The real-time running process of the vehicle is the actual use process of the vehicle. The real-time voltage of the battery can be the real-time detected voltage of the battery in the real-time running process of the vehicle. The real-time charging current of the battery can be the real-time detected charging current of the battery in the real-time running process of the vehicle. The real-time discharging current of the battery can be the real-time detected discharging current of the battery in the real-time running process of the vehicle. The real-time environmental parameter can be the environmental parameter in the real-time running process of the vehicle. For example, the real-time environmental parameter can include the real-time battery system temperature, the real-time charging and discharging rate, the real-time charging and discharging state of charge range and / or the real-time battery calendar range, etc. Among them, the real-time battery system temperature can be the real-time detected battery system temperature in the real-time running process of the vehicle. The real-time battery system temperature can be used to represent the real-time detected environmental temperature condition in the real-time running process of the vehicle. The real-time charging and discharging rate can be used to represent the real-time detected charging and discharging speed of the battery in the real-time running process of the vehicle. The real-time charging and discharging state of charge range can be used to represent the real-time detected remaining capacity of the battery in the real-time running process of the vehicle. The real-time battery calendar range, also known as the real-time battery calendar life, can be used to represent the real-time detected attenuation speed of the battery capacity in the non-use state in the real-time running process of the vehicle.

[0038] Specifically, in the real-time running process of the vehicle, the sensors or the vehicle system configured by the vehicle itself can be used to acquire the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the real-time environmental parameter in the real-time running process of the vehicle.

[0039] S102, according to the real-time environmental parameter, determining the actual influence factor of the real-time environmental parameter on the cycle life of the battery.

[0040] The actual influence factor of the real-time environmental parameter on the cycle life of the battery can be used to represent the influence degree of the actual environment on the cycle life of the battery. There is a preset corresponding relationship between the environmental parameter and the influence factor of the environmental parameter on the cycle life of the battery. Optionally, the corresponding relationship between the environmental parameter and the influence factor of the environmental parameter on the cycle life of the battery can be determined in advance. For example, the environmental parameter and the influence factor relationship table can be stored in the device in advance.

[0041] Specifically, according to the real-time environmental parameter, the pre-stored environmental parameter and influence factor relationship table can be queried to determine the influence factor corresponding to the real-time environmental parameter, and the actual influence factor of the real-time environmental parameter on the cycle life of the battery is obtained.

[0042] S103, calculating the real-time equivalent throughput of the battery according to the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery, and the real-time environmental parameter affecting the cycle life of the battery.

[0043] The real-time equivalent throughput of the battery can be used to represent the equivalent charging and discharging capacity of the battery when the influence of the actual environment is eliminated during the real-time operation of the vehicle. It can be understood that, during the real-time operation of the vehicle, there is a difference between the actual environment of the vehicle and the standard environment of the vehicle, and there is also a difference between the real-time throughput of the battery and the test throughput of the battery. The real-time equivalent throughput of the battery can be obtained on the basis of the real-time throughput of the battery, and the equivalent throughput of the battery corresponding to the standard environment can be obtained when the influence of the actual environment is eliminated.

[0044] Specifically, the real-time equivalent throughput of the battery can be calculated according to the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery, and the real-time environmental parameter affecting the cycle life of the battery by using a battery equivalent throughput calculation formula.

[0045] For example, the battery equivalent throughput calculation formula can be represented by the following formula:

[0046]

[0047] In the formula, CAP' represents the equivalent throughput of the battery; U' represents the voltage of the battery; I' represents the charging current of the battery; I' represents the discharging current of the battery; and F represents the influence factor of the environmental parameter on the cycle life of the battery. EQV BP BPchg BPdischg

[0048] S104, querying the test throughput of the battery corresponding to the real-time equivalent throughput of the battery, and determining the actual remaining power percentage and the actual remaining capacity percentage corresponding to the test throughput of the battery.

[0049] The test throughput of the battery can be the battery throughput measured when the charging and discharging cycle test is performed on the battery system in the standard environment. The actual remaining power percentage can be the ratio of the maximum power currently output by the battery to the rated power. The actual remaining capacity percentage can be the ratio of the available power of the battery to the total power in the fully charged state. The test throughput of the battery has a mapping relationship with the remaining power percentage and the remaining capacity percentage. Based on the test throughput of the battery, the corresponding remaining power percentage and the remaining capacity percentage can be directly determined.

[0050] ​​​​Specifically, the battery test throughput corresponding to the battery real-time equivalent throughput can be queried. The corresponding residual power percentage and residual capacity percentage can be determined based on the battery test throughput, to obtain the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput corresponding to the battery real-time equivalent throughput.

[0051] S105, detecting the battery health state according to the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput.

[0052] The battery health state can be used to represent whether the battery is available or needs to be replaced. For example, the battery health state can include healthy and unhealthy.

[0053] Specifically, the preset residual power percentage and the preset residual capacity percentage are obtained. The actual residual power percentage corresponding to the battery real-time equivalent throughput is compared with the preset residual power percentage. The actual residual capacity percentage corresponding to the battery real-time equivalent throughput is compared with the preset residual capacity percentage. When the actual residual power percentage is greater than or equal to the preset residual power percentage, and the actual residual capacity percentage is greater than or equal to the preset residual capacity percentage, the battery health state is determined to be healthy. When the actual residual power percentage is less than the preset residual power percentage, and / or the actual residual capacity percentage is less than the preset residual capacity percentage, the battery health state is determined to be unhealthy.

[0054] The technical scheme of the embodiment of the application, by acquiring the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and the real-time environmental parameter in the real-time running process of the vehicle in the real-time running process of the vehicle, determining the actual influence factor of the real-time environmental parameter on the battery cycle life according to the real-time environmental parameter, calculating the battery real-time equivalent throughput according to the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and the actual influence factor of the real-time environmental parameter on the battery cycle life, querying the battery test throughput corresponding to the battery real-time equivalent throughput, and determining the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput, detecting the battery health state according to the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput, without the need for special high-precision test equipment, solves the problem that the traditional SOH evaluation cannot realize real-time high-precision state monitoring of the power battery system, and takes the battery test throughput of the power battery system as the basis, comprehensively considers the real-time environmental parameter in the real-time running process of the vehicle, realizes real-time high-precision state monitoring of the health state of the power battery system, and has the advantages of high accuracy, data visualization, and guidance for battery optimization use.

[0055] In an optional embodiment of the present application, before acquiring the real-time battery voltage, the real-time battery charging current, the real-time battery discharging current and the real-time environmental parameter during the real-time operation of the vehicle, the method further comprises: after the power battery system is finalized, performing a charge-discharge cycle test on the power battery system under a standard environment to acquire a battery test voltage, a battery test charging current and a battery test discharging current during the charge-discharge cycle test; calculating a battery test throughput according to the battery test voltage, the battery test charging current and the battery test discharging current; and determining a test remaining power percentage and a test remaining capacity percentage corresponding to the battery test throughput in the standard environment.

[0056] The power battery system can be a core energy device of a new energy vehicle. The power battery system can provide energy support for the new energy vehicle. The power battery system finalized can be understood as that the power battery system has undergone performance tests. The charge-discharge cycle test process can be a test process of charging and discharging the power battery system. The charge-discharge cycle test process can be used to evaluate the performance and service life of the power battery system.

[0057] The standard environment can be a test environment under standard environmental parameters. The standard environmental parameters can be environmental parameters during the charge-discharge cycle test process. Exemplarily, the standard environmental parameters can include a standard battery system temperature, a standard charge-discharge rate, a standard charge-discharge state of charge range and / or a standard battery calendar range, etc. The standard battery system temperature can be a battery system temperature detected during the charge-discharge cycle test process. The standard battery system temperature can be used to represent the environmental temperature condition detected during the charge-discharge cycle test process. The standard charge-discharge rate can be used to represent the battery charging and discharging speed detected during the charge-discharge cycle test process. The standard charge-discharge state of charge range can be used to represent the battery remaining capacity condition detected during the charge-discharge cycle test process. The standard battery calendar range, also known as the standard battery calendar life, can be used to represent the battery capacity decay speed in a non-use state detected during the charge-discharge cycle test process.

[0058] The battery test voltage can be a battery voltage detected by the vehicle during the charge-discharge cycle test process. The battery test charging current can be a battery charging current detected by the vehicle during the charge-discharge cycle test process. The test remaining power percentage can be a proportion of the maximum power outputtable by the battery during the charge-discharge cycle test process to the rated power. The test remaining capacity percentage can be a proportion of the available battery capacity during the charge-discharge cycle test process to the total capacity in a fully charged state.

[0059] Specifically, after the power battery system is finalized, the power battery system is subjected to a charge-discharge cycle test in a standard environment, and the battery test voltage, the battery test charging current and the battery test discharging current in the charge-discharge cycle test process can be obtained by using the sensors or the vehicle system configured by the vehicle itself. The battery test throughput is calculated according to the battery test voltage, the battery test charging current and the battery test discharging current by using the battery throughput calculation formula. The corresponding residual power percentage and residual capacity percentage can be determined based on the battery test throughput.

[0060] For example, the battery throughput calculation formula can be expressed as follows:

[0061] CAP STD = min(∫U BP I BPchg dt,∫U BP I BPdischg dt);

[0062] In the formula, CAP STD represents the battery test throughput; U BP represents the battery test voltage; I BPchg represents the battery test charging current; and I BPdischg represents the battery test discharging current.

[0063] The present scheme introduces the charge-discharge cycle test of the power battery system in the standard environment after the power battery system is finalized, obtains the battery test voltage, the battery test charging current and the battery test discharging current in the charge-discharge cycle test process, calculates the battery test throughput according to the battery test voltage, the battery test charging current and the battery test discharging current, and determines the test residual power percentage and the test residual capacity percentage corresponding to the battery test throughput in the standard environment, thereby realizing the pre-detection of the power battery system in the standard environment and providing a basis for the health state estimation of the power battery system.

[0064] In an optional embodiment of the present scheme, after the test residual power percentage and the test residual capacity percentage corresponding to the battery test throughput in the standard environment are determined, the method further includes: changing the standard environment parameters, detecting the changed residual power percentage and the changed residual capacity percentage corresponding to the changed environment parameters, and determining the environmental influence factor of the changed environment parameters on the battery cycle life based on the changed residual power percentage and the changed residual capacity percentage corresponding to the changed environment parameters and the test residual power percentage and the test residual capacity percentage corresponding to the standard environment.

[0065] The changed environmental parameter can be a change result of the standard environmental parameter. The changed remaining power percentage can be a proportion of a maximum power that the battery can output after the environmental parameter is changed to a rated power. The changed remaining capacity percentage can be a proportion of an available capacity of the battery after the environmental parameter is changed to a total capacity in a full charge state. The environmental influence factor of the changed environmental parameter on the cycle life of the battery can be used to represent a degree of influence of an actual environment on the cycle life of the battery.

[0066] Specifically, the unique variable principle can be used to change the standard environmental parameter, detect the changed remaining power percentage and the changed remaining capacity percentage corresponding to the changed environmental parameter. A ratio between the changed remaining power percentage corresponding to the changed environmental parameter and the test remaining power percentage corresponding to the standard environment can be calculated to determine a first ratio value. The changed remaining capacity percentage corresponding to the changed environmental parameter and the test remaining capacity percentage corresponding to the standard environment can be calculated to determine a second ratio value. The first ratio value and the second ratio value can be integrated to determine the environmental influence factor of the changed environmental parameter on the cycle life of the battery. For example, the first ratio value and the second ratio value can be weighted and summed to obtain the environmental influence factor of the changed environmental parameter on the cycle life of the battery. For another example, the minimum value of the first ratio value and the second ratio value can be selected to obtain the environmental influence factor of the changed environmental parameter on the cycle life of the battery.

[0067] The present scheme introduces the changed environmental parameter, changes the standard environmental parameter, detects the changed remaining power percentage and the changed remaining capacity percentage corresponding to the changed environmental parameter, determines the environmental influence factor of the changed environmental parameter on the cycle life of the battery based on the changed remaining power percentage and the changed remaining capacity percentage corresponding to the changed environmental parameter and the test remaining power percentage and the test remaining capacity percentage corresponding to the standard environment, realizes the mapping between the environmental parameter and the environmental influence factor of the environmental parameter on the cycle life of the battery, and improves the estimation efficiency of the state of health of the power battery system.

[0068] In an optional embodiment of the present application, the changed environmental parameter includes changing the battery system temperature, changing the charge-discharge rate, changing the charge-discharge state of charge range, and changing the battery calendar range. Correspondingly, the environmental influence factor of the changed environmental parameter on the cycle life of the battery includes the environmental influence factor of the changed battery system temperature on the cycle life of the battery, the environmental influence factor of the changed charge-discharge rate on the cycle life of the battery, the environmental influence factor of the changed charge-discharge state of charge range on the cycle life of the battery, and the environmental influence factor of the changed battery calendar range on the cycle life of the battery.

[0069] The changed battery system temperature can be a battery system temperature detected after the environmental parameter is changed. The changed battery system temperature can be used to characterize an environmental temperature condition detected after the environmental parameter is changed. The changed charge-discharge rate can be used to characterize a battery charge-discharge speed detected after the environmental parameter is changed. The changed charge-discharge state of charge range can be used to characterize a battery remaining capacity condition detected after the environmental parameter is changed. The changed battery calendar range, also referred to as the changed battery calendar life, can be used to characterize a battery capacity decay speed in a non-use state detected after the environmental parameter is changed. The environmental influence factor of the changed battery system temperature on the battery cycle life can be used to characterize the influence degree of the changed battery system temperature on the battery cycle life. The environmental influence factor of the changed charge-discharge rate on the battery cycle life can be used to characterize the influence degree of the changed charge-discharge rate on the battery cycle life. The environmental influence factor of the changed charge-discharge state of charge range on the battery cycle life can be used to characterize the influence degree of the changed charge-discharge state of charge range on the battery cycle life. The environmental influence factor of the changed battery calendar range on the battery cycle life can be used to characterize the influence degree of the changed battery calendar range on the battery cycle life.

[0070] The present solution improves the changed environmental parameter and the typicality of the changed environmental parameter by specifically changing the environmental parameter into the changed battery system temperature, the changed charge-discharge rate, the changed charge-discharge state of charge range and the changed battery calendar range, and correspondingly, specifically changing the environmental influence factor of the changed environmental parameter on the battery cycle life into the environmental influence factor of the changed battery system temperature on the battery cycle life, the environmental influence factor of the changed charge-discharge rate on the battery cycle life, the environmental influence factor of the changed charge-discharge state of charge range on the battery cycle life and the environmental influence factor of the changed battery calendar range on the battery cycle life, and further improves the estimation efficiency of the health state of the power battery system.

[0071] In an optional embodiment of the present application, after the power battery system is determined, the power battery system is subjected to charge-discharge cycle tests in a standard environment, and battery test voltages, battery test charging currents and battery test discharging currents in the charge-discharge cycle tests are obtained, including: after the power battery system is determined, the power battery system is subjected to multiple rounds of charge-discharge cycle tests in a standard environment, and battery test voltages, battery test charging currents and battery test discharging currents in the multiple rounds of charge-discharge cycle tests are obtained; correspondingly, the battery test throughput is calculated according to the battery test voltages, the battery test charging currents and the battery test discharging currents, including: for a single round of charge-discharge cycle test process, the single round battery test throughput in the single round of charge-discharge cycle test process is calculated according to the battery test voltages, the battery test charging currents and the battery test discharging currents; and the battery test throughput is determined according to the minimum value of each single round battery test throughput.

[0072] The single-round battery test throughput can be the battery test throughput obtained in a single-round charge-discharge cycle test process.

[0073] Specifically, after the power battery system is finalized, the power battery system is subjected to a plurality of rounds of charge-discharge cycle tests in a standard environment, and the battery test voltage, the battery test charging current and the battery test discharging current in the plurality of rounds of charge-discharge cycle tests can be obtained by using the sensors or the vehicle system configured by the vehicle itself. Correspondingly, for a single round of charge-discharge cycle test process, the battery test voltage, the battery test charging current and the battery test discharging current are used to calculate the single-round battery test throughput in the single round of charge-discharge cycle test process by using the battery throughput calculation formula. The minimum value of the single-round battery test throughputs can be selected to determine the battery test throughput.

[0074] The present scheme further improves the accuracy of the battery test throughput by obtaining the battery test voltage, the battery test charging current and the battery test discharging current in the plurality of rounds of charge-discharge cycle tests after the power battery system is finalized, and calculating the single-round battery test throughput in the single round of charge-discharge cycle test process according to the battery test voltage, the battery test charging current and the battery test discharging current, and determining the battery test throughput according to the minimum value of the single-round battery test throughputs, thereby improving the accuracy of the health state estimation of the power battery system.

[0075] Embodiment Two

[0076] Figure 2A flowchart of a power battery system health state estimation method provided for embodiment two of the present application. The embodiment of the present application further improves the accuracy of real-time estimation of the health state of the power battery system, based on the above-mentioned embodiment, by specifically implementing the "detecting the battery health state according to the actual residual power percentage and the actual residual capacity percentage corresponding to the real-time equivalent throughput of the battery" as "obtaining the battery historical voltage, the battery historical charging current, the battery historical discharging current and the historical environmental parameters in the historical running process of the vehicle; determining the historical influence factor of the historical environmental parameters on the cycle life of the battery according to the historical environmental parameters; calculating the battery historical equivalent throughput according to the actual influence factor of the battery historical voltage, the battery historical charging current, the battery historical discharging current and the historical environmental parameters on the cycle life of the battery; querying the battery test throughput corresponding to the battery historical equivalent throughput, and determining the historical residual power percentage and the historical residual capacity percentage corresponding to the battery test throughput; detecting the battery health state according to the historical residual power percentage and the historical residual capacity percentage corresponding to the battery historical equivalent throughput, and the actual residual power percentage and the actual residual capacity percentage corresponding to the real-time equivalent throughput of the battery". It should be noted that the parts not described in detail in the embodiment of the present application can be referred to the description of other embodiments.

[0077] Referring to Figure 2 The power battery system health state estimation method shown in the figure comprises:

[0078] S201, in the real-time running process of the vehicle, obtaining the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and the real-time environmental parameters in the real-time running process of the vehicle.

[0079] S202, determining the actual influence factor of the real-time environmental parameters on the cycle life of the battery according to the real-time environmental parameters.

[0080] S203, calculating the battery real-time equivalent throughput according to the actual influence factor of the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and the real-time environmental parameters on the cycle life of the battery.

[0081] S204, querying the battery test throughput corresponding to the battery real-time equivalent throughput, and determining the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput.

[0082] S205, obtaining the battery historical voltage, the battery historical charging current, the battery historical discharging current and the historical environmental parameters in the historical running process of the vehicle.

[0083] The vehicle historical running process is a historical use process of the vehicle. The battery historical voltage can be a historical detected battery voltage of the vehicle in the vehicle historical running process. The battery historical charging current can be a historical detected battery charging current of the vehicle in the vehicle historical running process. The battery historical discharging current can be a historical detected battery discharging current of the vehicle in the vehicle historical running process. The historical environmental parameter can be an environmental parameter in the vehicle historical running process. For example, the historical environmental parameter can include a historical battery system temperature, a historical charging / discharging rate, a historical charging / discharging state of charge range, and / or a historical battery calendar range, etc. The historical battery system temperature can be a historical detected battery system temperature in the vehicle historical running process, and can be used to represent a historical detected environmental temperature condition in the vehicle historical running process. The historical charging / discharging rate can be used to represent a historical detected charging / discharging speed of the battery in the vehicle historical running process. The historical charging / discharging state of charge range can be used to represent a historical detected remaining capacity of the battery in the vehicle historical running process. The historical battery calendar range, also referred to as a historical battery calendar life, can be used to represent a historical detected degradation speed of the battery capacity in a non-use state in the vehicle historical running process.

[0084] Specifically, in the vehicle historical running process, the battery historical voltage, the battery historical charging current, the battery historical discharging current, and the historical environmental parameter can be obtained by using a sensor or a vehicle infotainment system configured in the vehicle.

[0085] S206, determining a historical influence factor of the historical environmental parameter on the battery cycle life according to the historical environmental parameter.

[0086] The historical influence factor of the historical environmental parameter on the battery cycle life can be used to represent an influence degree of the historical environment on the battery cycle life.

[0087] Specifically, the influence factor corresponding to the historical environmental parameter can be determined by querying a pre-stored environmental parameter and influence factor relationship table according to the historical environmental parameter, so as to obtain the historical influence factor of the historical environmental parameter on the battery cycle life.

[0088] S207, calculating a battery historical equivalent throughput according to the battery historical voltage, the battery historical charging current, the battery historical discharging current, and the actual influence factor of the historical environmental parameter on the battery cycle life.

[0089] Battery historical equivalent throughput can be used to characterize the battery's equivalent charge and discharge capacity after removing the influence of historical environment during the vehicle's historical operation. It can be understood that during the vehicle's historical operation, there are differences between the vehicle's historical environment and its standard environment, and there are also differences between the battery's historical throughput and the battery's test throughput. Battery historical equivalent throughput, based on the battery's historical throughput and after removing the influence of historical environment, represents the battery's equivalent throughput under standard environment conditions.

[0090] Specifically, the battery historical equivalent throughput calculation formula can be used to calculate the battery historical equivalent throughput based on the battery historical voltage, battery historical charging current, battery historical discharging current, and the historical influence factors of historical environmental parameters on battery cycle life.

[0091] For example, the following formula can be used to represent the formula for calculating the equivalent throughput of a battery:

[0092]

[0093] In the formula, CAP′ EQV U′ is the battery equivalent throughput. BP Battery voltage; I′ BPchg Battery charging current; I′ BPdischg is the battery discharge current; F is the environmental parameter's influence on the battery's cycle life.

[0094] S208. Query the battery test throughput corresponding to the battery's historical equivalent throughput, and determine the historical remaining power percentage and historical remaining capacity percentage corresponding to the battery test throughput.

[0095] Historical remaining power percentage can be the ratio of the battery's historical maximum output power to its rated power. Historical remaining capacity percentage can be the ratio of the battery's historical available capacity to its total capacity in a fully charged state.

[0096] Specifically, you can query the battery test throughput that is the same as or closest to the battery's historical equivalent throughput. Based on the battery test throughput, you can determine the corresponding remaining power percentage and remaining capacity percentage, thus obtaining the historical remaining power percentage and historical remaining capacity percentage corresponding to the battery test throughput corresponding to the battery's historical equivalent throughput.

[0097] S209. Detect the battery health status based on the historical remaining power percentage and historical remaining capacity percentage corresponding to the battery's historical equivalent throughput, as well as the actual remaining power percentage and actual remaining capacity percentage corresponding to the battery's real-time equivalent throughput.

[0098] In particular, a preset remaining power percentage and a preset remaining capacity percentage are obtained. The historical remaining power percentage corresponding to the historical equivalent throughput of the battery is compared with the preset remaining power percentage. The historical remaining capacity percentage corresponding to the historical equivalent throughput of the battery is compared with the preset remaining capacity percentage. The actual remaining power percentage corresponding to the real-time equivalent throughput of the battery is compared with the preset remaining power percentage. The actual remaining capacity percentage corresponding to the real-time equivalent throughput of the battery is compared with the preset remaining capacity percentage. When the historical remaining power percentage is greater than or equal to the preset remaining power percentage, the historical remaining capacity percentage is greater than or equal to the preset remaining capacity percentage, the actual remaining power percentage is greater than or equal to the preset remaining power percentage, and the actual remaining capacity percentage is greater than or equal to the preset remaining capacity percentage, the battery health state is determined to be healthy. When the historical remaining power percentage is less than the preset remaining power percentage, the historical remaining capacity percentage is less than the preset remaining capacity percentage, the actual remaining power percentage is less than the preset remaining power percentage, and / or the actual remaining capacity percentage is less than the preset remaining capacity percentage, the battery health state is determined to be unhealthy.

[0099] Alternatively, the battery health state can also be detected according to the historical remaining power percentage and the historical remaining capacity percentage corresponding to the historical equivalent throughput of the battery. In particular, a preset remaining power percentage and a preset remaining capacity percentage are obtained. The historical remaining power percentage corresponding to the historical equivalent throughput of the battery is compared with the preset remaining power percentage. The historical remaining capacity percentage corresponding to the historical equivalent throughput of the battery is compared with the preset remaining capacity percentage. When the historical remaining power percentage is greater than or equal to the preset remaining power percentage and the historical remaining capacity percentage is greater than or equal to the preset remaining capacity percentage, the battery health state is determined to be healthy. When the historical remaining power percentage is less than the preset remaining power percentage and / or the historical remaining capacity percentage is less than the preset remaining capacity percentage, the battery health state is determined to be unhealthy.

[0100] The technical scheme of the embodiment of the present application introduces the battery historical voltage, the battery historical charging current, the battery historical discharging current and the historical environmental parameter in the historical running process of the vehicle on the basis of real-time detection of the battery health state in the real-time running process of the vehicle, determines the historical influence factor of the historical environmental parameter on the battery cycle life according to the historical environmental parameter, calculates the battery historical equivalent throughput according to the actual influence factor of the battery historical voltage, the battery historical charging current, the battery historical discharging current and the historical environmental parameter on the battery cycle life, queries the battery test throughput corresponding to the battery historical equivalent throughput, and determines the historical residual power percentage and the historical residual capacity percentage corresponding to the battery test throughput, detects the battery health state according to the historical residual power percentage and the historical residual capacity percentage corresponding to the battery historical equivalent throughput and the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput, and further improves the accuracy of real-time estimation of the health state of the power battery system.

[0101] On the basis of the above-mentioned embodiment, Figure 3 A preferred embodiment of a power battery system health state estimation method is provided in the present application. Referring to the power battery system health state estimation method shown in Figure 3 The power battery system health state estimation method comprises the following steps:

[0102] S301, acquire throughput measurement data under a standard environment, and determine residual power percentage and residual capacity percentage based on throughput.

[0103] The standard environment is a test environment under standard environmental parameters. The standard environmental parameters are environmental parameters in the process of the charging and discharging cycle test. Exemplarily, the standard environmental parameters can include standard battery system temperature, standard charging and discharging rate, standard charging and discharging state of charge range and / or standard battery calendar range, etc. The throughput measurement data under the standard environment includes battery test voltage, battery test charging current and battery test discharging current in the process of the charging and discharging cycle test. The residual power percentage under the throughput is the test residual power percentage corresponding to the battery test throughput in the standard environment. The residual capacity percentage under the throughput is the test residual capacity percentage corresponding to the battery test throughput in the standard environment.

[0104] Specifically, after the power battery system is finalized, the power battery system is tested in multiple rounds of charging and discharging cycles in a standard environment to obtain battery test voltages, battery test charging currents and battery test discharging currents in the multiple rounds of charging and discharging cycle tests. For a single round of charging and discharging cycle test, a single round of battery test throughput in the single round of charging and discharging cycle test is calculated according to the battery test voltages, the battery test charging currents and the battery test discharging currents. A battery test throughput is determined according to a minimum value of the single round of battery test throughputs. According to the battery test throughput, a test remaining power percentage and a test remaining capacity percentage corresponding to the battery test throughput in the standard environment are determined.

[0105] For example, the following formula can be used to represent the battery throughput calculation formula:

[0106] CAP STD = min(∫U BP I BPchg dt,∫U BP I BPdischg dt);

[0107] In the formula, CAP STD represents the battery test throughput; U BP represents the battery test voltage; I BPchg represents the battery test charging current; and I BPdischg represents the battery test discharging current.

[0108] The following formula can be used to determine the test remaining power percentage corresponding to the battery test throughput in the standard environment:

[0109] P CAP = MAP PCAP (CAP STD );

[0110] In the formula, P CAP represents the test remaining power percentage corresponding to the battery test throughput; and CAP STD represents the battery test throughput.

[0111] The following formula can be used to determine the test remaining capacity percentage corresponding to the battery test throughput in the standard environment:

[0112] C CAP = MAP CCAP (CAP STD );

[0113] In the formula, C CAP represents the test remaining capacity percentage corresponding to the battery test throughput; and CAP STD represents the battery test throughput.

[0114] S302. Following the principle of unique variables, using the measured power battery system temperature, charge / discharge rate, charge / discharge state range, and battery calendar range as unique variables respectively, determine the influence factor F of power battery temperature change on battery cycle life. T =MAP T (BP Temp ), Determine the effect of charge / discharge rate on battery cycle life factor F I =MAP I (BP I ), Determine the influence factor F of the charge / discharge state range on the battery cycle life. SOC =MAP SOC (BP SOC And the effect of battery calendar range on battery cycle life, factor F. D =MAP D (BP Date ).

[0115] S303. Based on historical data or real-time accumulation of battery operating status, calculate the battery equivalent throughput, determine the remaining power percentage and remaining capacity percentage under the equivalent throughput, and detect the battery health status.

[0116] Equivalent throughput CAP′ EQV This refers to the cumulative throughput of the power battery system under real-time or historical environmental conditions. Historical data on battery operating status includes historical battery voltage, historical battery charging current, historical battery discharging current, and historical environmental parameters. Historical environmental parameters include historical battery system temperature, historical charge / discharge rate, historical charge / discharge state of charge range, and historical battery calendar range. Real-time cumulative battery operating status includes real-time battery voltage, real-time battery charging current, real-time battery discharging current, and real-time environmental parameters. Real-time environmental parameters include real-time battery system temperature, real-time charge / discharge rate, real-time charge / discharge state of charge range, and real-time battery calendar range.

[0117] Specifically, through The historical equivalent throughput of the battery is determined based on the historical influence factors of battery historical voltage, historical charging current, historical discharging current, and historical environmental parameters on battery cycle life. This is then used to determine the historical equivalent throughput CAP′. EQV Look up table P EQV =MAP PEQV (CAP EQV Obtain the battery's historical equivalent throughput CAP′ EQV The historical remaining power percentage of the power battery system can be found in Table C. EQV =MAP CEQV (CAP EQV Obtain the battery's historical equivalent throughput CAP′EQV The historical remaining capacity percentage of the power battery system is used to detect the battery's health status based on the historical remaining power percentage and historical remaining capacity percentage corresponding to the battery's historical equivalent throughput.

[0118] Specifically, using the same formula, the real-time equivalent throughput of the battery is determined based on the real-time influence factors of the battery's real-time voltage, real-time charging current, real-time discharging current, and real-time environmental parameters on the battery's cycle life. This is then used to determine the battery's real-time equivalent throughput CAP′. EQV Look up table P EQV =MAP PEQV (CAP EQV Obtain the real-time equivalent throughput CAP′ of the battery. EQV The real-time remaining power percentage of the power battery system can be found in Table C. EQV =MAP CEQV (CAP EQV Obtain the real-time equivalent throughput CAP′ of the battery. EQV The real-time remaining capacity percentage of the power battery system is measured. The battery health status is detected based on the actual remaining power percentage and actual remaining capacity percentage corresponding to the battery's real-time equivalent throughput.

[0119] To address the shortcomings of traditional power battery system health status estimation methods, such as low accuracy, the need for high-precision testing equipment, the requirement for bench cycle charging tests, and the lack of consideration for historical usage data, this solution proposes the concept of equivalent throughput. It provides a method based on post-design data of the power battery system, combined with historical or real-time data, to estimate the remaining capacity percentage and remaining power percentage. This method can also be applied to battery management systems to achieve real-time monitoring of battery health status, ultimately providing a method for estimating the current health status of the power battery system. Compared to existing technologies, the power battery system health status estimation method described in this solution, based on the power battery system design data and comprehensively considering various influencing factors during use, features high accuracy, data visualization, and the ability to guide optimized battery use. It is particularly suitable for evaluating the health status of power battery systems and can be integrated into battery management systems for real-time health status assessment.

[0120] Example 3

[0121] Figure 4A structural schematic diagram of a power battery system health state estimation device is provided for the third embodiment of the present application. The third embodiment of the present application can be applied to the real-time estimation of the health state of the power battery system. The device can execute the power battery system health state estimation method. The device can be realized in the form of hardware and / or software. The device can be configured in an electronic device that bears the power battery system health state estimation function.

[0122] Referring to Figure 4 The power battery system health state estimation device shown in the third embodiment of the present application comprises a real-time running process data acquisition module 401, an actual influence factor determination module 402, a battery real-time equivalent throughput calculation module 403, an actual residual percentage determination module 404, and a battery health state detection module 405. The real-time running process data acquisition module 401 is configured to acquire the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current, and the real-time environmental parameters during the real-time running process of the vehicle. The actual influence factor determination module 402 is configured to determine the actual influence factor of the real-time environmental parameters on the battery cycle life according to the real-time environmental parameters. The battery real-time equivalent throughput calculation module 403 is configured to calculate the battery real-time equivalent throughput according to the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current, and the actual influence factor of the real-time environmental parameters on the battery cycle life. The actual residual percentage determination module 404 is configured to query the battery test throughput corresponding to the battery real-time equivalent throughput, and determine the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput. The battery health state detection module 405 is configured to detect the battery health state according to the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput.

[0123] The technical scheme of the embodiment of the present application, by acquiring the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and the real-time environmental parameter in the real-time running process of the vehicle, determining the actual influence factor of the real-time environmental parameter on the battery cycle life according to the real-time environmental parameter, calculating the battery real-time equivalent throughput according to the actual influence factor of the battery real-time voltage, the battery real-time charging current, the battery real-time discharging current and the real-time environmental parameter on the battery cycle life, querying the battery test throughput corresponding to the battery real-time equivalent throughput, and determining the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput, detecting the battery health state according to the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput, without the need for special high-precision test equipment, solves the problem that the traditional SOH evaluation cannot realize real-time high-precision state monitoring of the power battery system, and realizes real-time high-precision state monitoring of the power battery system health state based on the battery test throughput of the power battery system and comprehensive consideration of the real-time environmental parameter in the real-time running process of the vehicle, with the advantages of high accuracy, data visualization and guidance for battery optimization use.

[0124] In an optional embodiment of the present application, the battery health state detection module 405 comprises: a historical running process data acquisition unit, configured to acquire the battery historical voltage, the battery historical charging current, the battery historical discharging current and the historical environmental parameter in the historical running process of the vehicle; a historical influence factor determination unit, configured to determine the historical influence factor of the historical environmental parameter on the battery cycle life according to the historical environmental parameter; a battery historical equivalent throughput calculation unit, configured to calculate the battery historical equivalent throughput according to the actual influence factor of the battery historical voltage, the battery historical charging current, the battery historical discharging current and the historical environmental parameter on the battery cycle life; a historical residual percentage determination unit, configured to query the battery test throughput corresponding to the battery historical equivalent throughput, and determine the historical residual power percentage and the historical residual capacity percentage corresponding to the battery test throughput; and a battery health state detection unit, configured to detect the battery health state according to the historical residual power percentage and the historical residual capacity percentage corresponding to the battery historical equivalent throughput and the actual residual power percentage and the actual residual capacity percentage corresponding to the battery real-time equivalent throughput.

[0125] In an optional embodiment of the present application, the device further comprises: a standard environment data acquisition module, configured to, before the acquisition of the real-time voltage of the battery, the real-time charging current of the battery, the real-time discharging current of the battery and the real-time environment parameter during the real-time operation of the vehicle, perform a charge-discharge cycle test on the power battery system in a standard environment after the power battery system is finalized, and acquire a battery test voltage, a battery test charging current and a battery test discharging current during the charge-discharge cycle test; a battery test throughput calculation module, configured to calculate a battery test throughput according to the battery test voltage, the battery test charging current and the battery test discharging current; and a test remaining percentage determination module, configured to determine a test remaining power percentage and a test remaining capacity percentage corresponding to the battery test throughput in the standard environment according to the battery test throughput.

[0126] In an optional embodiment of the present application, the device further comprises: a change remaining percentage detection module, configured to, after the determination of the test remaining power percentage and the test remaining capacity percentage corresponding to the battery test throughput in the standard environment according to the battery test throughput, change the standard environment parameter, and detect a change remaining power percentage and a change remaining capacity percentage corresponding to the changed environment parameter; and an environment influence factor determination module, configured to determine an environment influence factor of the changed environment parameter on the cycle life of the battery based on the change remaining power percentage and the change remaining capacity percentage corresponding to the changed environment parameter and the test remaining power percentage and the test remaining capacity percentage corresponding to the standard environment.

[0127] In an optional embodiment of the present application, the changed environment parameter comprises a changed battery system temperature, a changed charge-discharge rate, a changed charge-discharge state of charge range and a changed battery calendar range; and correspondingly, the environment influence factor of the changed environment parameter on the cycle life of the battery comprises an environment influence factor of the changed battery system temperature on the cycle life of the battery, an environment influence factor of the changed charge-discharge rate on the cycle life of the battery, an environment influence factor of the changed charge-discharge state of charge range on the cycle life of the battery and an environment influence factor of the changed battery calendar range on the cycle life of the battery.

[0128] In an alternative embodiment of the present application, the standard environment data acquisition module comprises a standard environment data acquisition unit configured to acquire battery test voltage, battery test charging current and battery test discharging current during a plurality of charging and discharging cycle tests of the power battery system in a standard environment after the power battery system is finalized.

[0129] The power battery system health state estimation device provided by the embodiments of the present application can execute the power battery system health state estimation method provided by any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0130] In the technical solution of the embodiments of the present application, the acquisition, storage and application of the battery real-time voltage, battery real-time charging current, battery real-time discharging current, real-time environment parameter, battery historical voltage, battery historical charging current, battery historical discharging current, historical environment parameter, battery test voltage, battery test charging current and battery test discharging current, etc. all conform to the relevant legal regulations and do not violate public order and good customs.

[0131] Embodiment Four

[0132] Figure 5 A structural schematic diagram of an electronic device 500 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smartphones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown here, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit the inventiveness in the present document as described and / or claimed.

[0133] As Figure 5As shown, the electronic device 500 includes at least one processor 501, and a memory, such as a read-only memory (ROM) 502, a random access memory (RAM) 503, and the like, which is communicatively connected to the at least one processor 501. The memory stores a computer program that can be executed by the at least one processor, and the processor 501 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 502 or loaded into the random access memory (RAM) 503 from the storage unit 508. In the RAM 503, various programs and data required for the operation of the electronic device 500 can also be stored. The processor 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0134] A plurality of components in the electronic device 500 are connected to the I / O interface 505, including an input unit 506, such as a keyboard, a mouse, and the like, an output unit 507, such as various types of displays, a speaker, and the like, a storage unit 508, such as a magnetic disk, an optical disk, and the like, and a communication unit 509, such as a network card, a modem, a wireless communication transceiver, and the like. The communication unit 509 allows the electronic device 500 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0135] The processor 501 can be various general and / or special-purpose processing components having processing and computing capabilities. Some examples of the processor 501 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, and the like. The processor 501 performs various methods and processes described above, such as the power battery system state of health estimation method.

[0136] In some embodiments, the power battery system state of health estimation method can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 508. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 500 via the ROM 502 and / or the communication unit 509. When the computer program is loaded into the RAM 503 and executed by the processor 501, one or more steps of the power battery system state of health estimation method described above can be performed. Alternatively, in other embodiments, the processor 501 can be configured to perform the power battery system state of health estimation method by any other appropriate means, such as by means of firmware.

[0137] The various embodiments of the systems and techniques described above can be implemented in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a complex programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0138] Computer programs used to implement the processes of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer program

[0139] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store computer programs for use by or in connection with an instruction execution system, apparatus, or device. Computer-readable storage media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium will include one or more lines of electrical connections, portable computer disks, hard disk drives, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fibers, portable compact disc read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0140] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0141] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), blockchain network, and the Internet.

[0142] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. A server can be a cloud server, also known as cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS (Virtual Private Server).

[0143] It should be understood that the various forms of flow shown above can be re-ordered, added to, or deleted from without departing from the scope of the present disclosure. For example, the steps recited in the present disclosure can be executed in parallel, executed in sequence, or executed in different orders, as long as the desired results of the technical solutions of the present disclosure are achieved, and the present disclosure is not limited herein.

[0144] The above detailed description does not limit the scope of the application. Various modifications, combinations, sub-combinations and alternatives can be made to the detailed embodiment within the scope of the application. Any modification, equivalent replacement and improvement made without departing from the spirit and principle of the application shall fall within the scope of the application.

Claims

1. A method for estimating the state of health of a power battery system, characterized in that, The method comprises: During real-time operation of the vehicle, acquiring real-time battery voltage, real-time battery charging current, real-time battery discharging current and real-time environmental parameters during real-time operation of the vehicle; According to the real-time environmental parameters, determining the actual influence factor of the real-time environmental parameters on the cycle life of the battery; According to the real-time battery voltage, the real-time battery charging current, the real-time battery discharging current and the actual influence factor of the real-time environmental parameters on the cycle life of the battery, calculating the real-time equivalent throughput of the battery; Inquiring the battery test throughput corresponding to the real-time equivalent throughput of the battery, and determining the actual residual power percentage and the actual residual capacity percentage corresponding to the battery test throughput; According to the actual residual power percentage and the actual residual capacity percentage corresponding to the real-time equivalent throughput of the battery, detecting the battery health state.

2. The method of claim 1, wherein, The method comprises: Acquiring battery historical voltage, battery historical charging current, battery historical discharging current and historical environmental parameters during historical operation of the vehicle; According to the historical environmental parameters, determining the historical influence factor of the historical environmental parameters on the cycle life of the battery; According to the battery historical voltage, the battery historical charging current, the battery historical discharging current and the actual influence factor of the historical environmental parameters on the cycle life of the battery, calculating the historical equivalent throughput of the battery; Inquiring the battery test throughput corresponding to the historical equivalent throughput of the battery, and determining the historical residual power percentage and the historical residual capacity percentage corresponding to the battery test throughput; According to the historical residual power percentage and the historical residual capacity percentage corresponding to the historical equivalent throughput of the battery, and the actual residual power percentage and the actual residual capacity percentage corresponding to the real-time equivalent throughput of the battery, detecting the battery health state.

3. The method of claim 1, wherein, Before the step of acquiring real-time battery voltage, real-time battery charging current, real-time battery discharging current and real-time environmental parameters during real-time operation of the vehicle, the method further comprises: After the power battery system is finalized, performing charging and discharging cycle test on the power battery system under standard environment, and acquiring battery test voltage, battery test charging current and battery test discharging current during the charging and discharging cycle test; According to the battery test voltage, the battery test charging current and the battery test discharging current, calculating the battery test throughput; According to the battery test throughput, determining the test residual power percentage and the test residual capacity percentage corresponding to the battery test throughput in the standard environment.

4. The method of claim 3, wherein, After the step of determining the test residual power percentage and the test residual capacity percentage corresponding to the battery test throughput in the standard environment, the method further comprises: Changing the standard environmental parameters, and detecting the changed residual power percentage and the changed residual capacity percentage corresponding to the changed environmental parameters; Determine an environmental impact factor of the changed environmental parameter on the battery cycle life based on the changed remaining power percentage and the changed remaining capacity percentage corresponding to the changed environmental parameter and the test remaining power percentage and the test remaining capacity percentage corresponding to the standard environment.

5. The method of claim 4, wherein, The changed environmental parameter includes a changed battery system temperature, a changed charge-discharge rate, a changed charge-discharge state of charge range, and a changed battery calendar range. Correspondingly, the environmental impact factor of the changed environmental parameter on the battery cycle life includes an environmental impact factor of the changed battery system temperature on the battery cycle life, an environmental impact factor of the changed charge-discharge rate on the battery cycle life, an environmental impact factor of the changed charge-discharge state of charge range on the battery cycle life, and an environmental impact factor of the changed battery calendar range on the battery cycle life.

6. The method of claim 4, wherein, After the power battery system is finalized, the power battery system is tested for charge-discharge cycling under a standard environment to obtain battery test voltages, battery test charging currents, and battery test discharging currents during the charge-discharge cycling test process, including: After the power battery system is finalized, the power battery system is tested for multiple rounds of charge-discharge cycling under a standard environment to obtain battery test voltages, battery test charging currents, and battery test discharging currents during the multiple rounds of charge-discharge cycling test process; Correspondingly, the calculation of the battery test throughput according to the battery test voltages, the battery test charging currents, and the battery test discharging currents includes: For a single round of the charge-discharge cycling test process, a single round battery test throughput in a single round of the charge-discharge cycling test process is calculated according to the battery test voltages, the battery test charging currents, and the battery test discharging currents; A battery test throughput is determined according to a minimum value of each single round battery test throughput.

7. A device for estimating the state of health of a power battery system, characterized in that The device includes: A real-time running process data acquisition module configured to acquire, during a real-time running process of a vehicle, battery real-time voltages, battery real-time charging currents, battery real-time discharging currents, and real-time environmental parameters during the real-time running process of the vehicle; An actual impact factor determination module configured to determine an actual impact factor of the real-time environmental parameters on a battery cycle life according to the real-time environmental parameters; A battery real-time equivalent throughput calculation module configured to calculate a battery real-time equivalent throughput according to the battery real-time voltages, the battery real-time charging currents, the battery real-time discharging currents, and the actual impact factor of the real-time environmental parameters on the battery cycle life; An actual remaining percentage determination module configured to query a battery test throughput corresponding to the battery real-time equivalent throughput, and determine an actual remaining power percentage and an actual remaining capacity percentage corresponding to the battery test throughput; A battery health state detection module configured to detect a battery health state according to the actual remaining power percentage and the actual remaining capacity percentage corresponding to the battery real-time equivalent throughput.

8. An electronic device, comprising: The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the power battery system health state estimation method in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for enabling the processor to implement the power battery system health state estimation method in any one of claims 1-6 when executed.

10. A computer program product, characterised in that, The computer program product comprises a computer program which, when executed by a processor, implements the power battery system health state estimation method according to any one of claims 1-6.

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