Vehicle-mounted power battery performance estimation method and device, and computer equipment

Abstract

The application relates to a vehicle-mounted power battery performance estimation method and device, computer equipment, a storage medium and a computer program product, which comprise the following steps: acquiring a real-time charging current and a real-time discharging current, determining a real-time working state of the power battery according to the real-time charging current and the real-time discharging current, determining a real-time energy pool value of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery when the real-time working state is in a discharging state or a charging state, determining a real-time working limit percentage of the power battery according to the real-time energy pool value, determining a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery, and determining a real-time working torque limit value of the power battery according to the real-time allowable working current. Based on the instantaneous and peak discharging characteristics of the power battery, the real-time power release and power recovery speed of the power battery charging and discharging are fitted, and the estimation accuracy of the real-time performance of the power battery is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery management, in particular to a vehicle-mounted power battery performance estimation method and device, computer equipment, storage medium and computer program product. BACKGROUND

[0002] For pure electric vehicles, hybrid vehicles, fuel cell vehicles and the like, during vehicle driving, the vehicle control unit generally controls the power motor torque to realize vehicle acceleration or deceleration control to respond to the driving demand of the driver. The power battery provides electric energy for the power motor driving process and stores electric energy through the motor feedback process. The torque that can be provided by the power motor or the torque that can be absorbed is limited by the electric power provided or absorbed by the power battery system. When the driving power of the power motor is greater than the electric power provided by the power battery or the power generation power of the power motor is greater than the electric power that can be absorbed by the power battery, overcurrent discharge or overcurrent charging of the power battery and the like will occur. In severe cases, the cycle life of the power battery is affected, and even safety problems such as thermal runaway or spontaneous combustion occur.

[0003] In related technologies, the power battery power MAP table is generally used to limit the charging and discharging of the power battery. During the driving or power generation of the power motor, the power motor request torque is limited by the continuous discharge or continuous charging power of the power battery. When the power battery overflows, the high-voltage contactor is disconnected to protect the power battery. Since the power battery can allow short-time peak charging or discharging working conditions, relying solely on the continuous charging or discharging power of the power battery will not effectively utilize the peak power characteristics of the power battery. Although the control method of disconnecting the high-voltage contactor can effectively protect the power battery, the vehicle loses power or driving is interrupted, which poses a safety hazard. SUMMARY

[0004] Therefore, it is necessary to provide a safe vehicle-mounted power battery performance estimation method, device, computer equipment, computer readable storage medium and computer program product to solve the above technical problems.

[0005] In a first aspect, the present application provides a vehicle-mounted power battery performance estimation method. The method comprises:

[0006] obtaining a real-time charging current and a real-time discharging current of the power battery, and determining a real-time working state of the power battery according to the real-time charging current and the real-time discharging current;

[0007] in a case where the real-time working state is a discharging state or a charging state, determining a real-time value of an energy pool of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery;

[0008] According to the real-time value of the energy pool, a real-time working limit percentage of the power battery is determined;

[0009] According to the working limit percentage and the allowed peak working current of the power battery, a real-time allowed working current value of the power battery is determined;

[0010] According to the real-time allowed working current, a real-time working torque limit value of the power battery is determined.

[0011] In one embodiment, the real-time value of the energy pool of the power battery is determined according to the real-time nuclear charge number and the real-time temperature of the power battery, comprising:

[0012] According to the real-time nuclear charge number and the real-time temperature, a working energy pool value of the power battery is determined;

[0013] According to the working energy pool value, the real-time value of the energy pool of the power battery is determined.

[0014] In one embodiment, the real-time working state is a charging state, and the allowed peak working current includes an allowed peak charging current; accordingly, the working energy pool value of the power battery is determined according to the real-time nuclear charge number and the real-time temperature, comprising:

[0015] According to the real-time nuclear charge number and the real-time temperature, a real-time absorption current and an allowed peak charging current of the power battery are determined;

[0016] According to the real-time absorption current and the allowed peak charging current, the working energy pool value of the power battery is determined.

[0017] In one embodiment, the real-time allowed working current includes a real-time allowed charging current; accordingly, the real-time working torque limit value of the power battery is determined according to the real-time allowed working current, comprising:

[0018] Mtr GenTrq = 9550 * BP V * I ChgRT / (Mtr RTSpd * Mtr GenEff );

[0019] Wherein, Mtr GenTrq is a real-time power generation torque limit value of a power motor corresponding to the power battery, BP V is a real-time voltage value of the power battery, I ChgRT is a real-time allowed charging current of the power battery, Mtr RTSpd is a real-time speed of the power motor corresponding to the power battery, Mtr GenEff is a real-time power generation efficiency of the power motor corresponding to the power battery.

[0020] In one of the embodiments, the real-time working limit percentage of the power battery is determined according to the real-time value of the energy pool, including:

[0021] The first real-time working limit sub-percentage corresponding to the real-time value of the energy pool is determined.

[0022] The real-time value of the working safety parameter of the power battery is obtained, and the second real-time working limit sub-percentage corresponding to the real-time value of the working safety parameter is determined.

[0023] The real-time working limit percentage of the power battery is determined according to the first real-time working limit sub-percentage and the second real-time working limit sub-percentage.

[0024] In one of the embodiments, the method further includes:

[0025] In the case that the real-time working state is the static state, the real-time value of the energy pool obtained at the last time when the working state of the power battery is converted to the static state is taken as the real-time value of the energy pool in the static state.

[0026] The real-time value of the energy pool corresponding to the static state is compared with the preset value of the energy pool of the power battery, and the third real-time working limit sub-percentage corresponding to the static state is determined according to the comparison result.

[0027] The third real-time working limit sub-percentage corresponding to the static state is taken as the initial value of the first real-time working limit sub-percentage when the working state of the power battery is converted from the static state to the charging state or the discharging state.

[0028] In the second aspect, the application further provides a vehicle-mounted power battery performance estimation device. The device includes:

[0029] The state determination module is configured to obtain the real-time charging current and the real-time discharging current of the power battery, and determine the real-time working state of the power battery according to the real-time charging current and the real-time discharging current.

[0030] The energy pool calculation module is configured to determine the real-time value of the energy pool of the power battery according to the real-time nuclear charge number and the real-time temperature of the power battery in the case that the real-time working state is the discharging state or the charging state.

[0031] The first determination module is configured to determine the real-time working limit percentage of the power battery according to the real-time value of the energy pool.

[0032] The second determination module is configured to determine the real-time allowable working current value of the power battery according to the working limit percentage and the allowable peak working current of the power battery.

[0033] The third determination module is configured to determine the real-time working torque limit value of the power battery according to the real-time allowable working current.

[0034] In a third aspect, the present application further provides a computer device. The computer device comprises a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0035] obtaining a real-time charging current and a real-time discharging current of the power battery, and determining a real-time working state of the power battery according to the real-time charging current and the real-time discharging current;

[0036] in a case where the real-time working state is the discharging state or the charging state, determining a real-time energy pool value of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery;

[0037] determining a real-time working limit percentage of the power battery according to the real-time energy pool value;

[0038] determining a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery;

[0039] determining a real-time working torque limit value of the power battery according to the real-time allowable working current.

[0040] In a fourth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the following steps:

[0041] obtaining a real-time charging current and a real-time discharging current of the power battery, and determining a real-time working state of the power battery according to the real-time charging current and the real-time discharging current;

[0042] in a case where the real-time working state is the discharging state or the charging state, determining a real-time energy pool value of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery;

[0043] determining a real-time working limit percentage of the power battery according to the real-time energy pool value;

[0044] determining a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery;

[0045] determining a real-time working torque limit value of the power battery according to the real-time allowable working current.

[0046] In a fifth aspect, the present application further provides a computer program product. The computer program product comprises a computer program, and the computer program is executed by a processor to implement the following steps:

[0047] obtaining a real-time charging current and a real-time discharging current of the power battery, and determining a real-time working state of the power battery according to the real-time charging current and the real-time discharging current;

[0048] In the case that the real-time working state is the discharging state or the charging state, the real-time energy pool value of the power battery is determined according to the real-time nuclear charge number and the real-time temperature of the power battery;

[0049] The real-time working limit percentage of the power battery is determined according to the real-time energy pool value;

[0050] The real-time allowable working current value of the power battery is determined according to the working limit percentage and the allowable peak working current of the power battery;

[0051] The real-time working torque limit value of the power battery is determined according to the real-time allowable working current.

[0052] The vehicle-mounted power battery performance estimation method, device, computer equipment, storage medium and computer program product, the real-time charging current and the real-time discharging current of the power battery are obtained, the real-time working state of the power battery is determined according to the real-time charging current and the real-time discharging current; in the case that the real-time working state is the discharging state or the charging state, the real-time energy pool value of the power battery is determined according to the real-time nuclear charge number and the real-time temperature of the power battery; the real-time working limit percentage of the power battery is determined according to the real-time energy pool value; the real-time allowable working current value of the power battery is determined according to the working limit percentage and the allowable peak working current of the power battery; the real-time working torque limit value of the power battery is determined according to the real-time allowable working current. Based on the instantaneous and peak discharging characteristics of the power battery, the real-time power release and power recovery speed of the power battery charging and discharging are fitted, and the maximum charging power or discharging power allowed by the current power battery is estimated in real time. The maximum power absorption or release of the power battery and the linearization of the control process are realized, the estimation accuracy of the real-time performance of the power battery is improved, and at the same time, due to the non-interrupted charging and discharging working condition, high-voltage power-off protection is avoided, and vehicle driving safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 It is an application environment diagram of the vehicle-mounted power battery performance estimation method in one embodiment;

[0054] Figure 2 It is a flowchart of the vehicle-mounted power battery performance estimation method in one embodiment;

[0055] Figure 3 It is a flowchart of the vehicle-mounted power battery performance estimation method in another embodiment;

[0056] Figure 4 It is a flowchart of the vehicle-mounted power battery performance estimation method in another embodiment;

[0057] Figure 5This is a structural block diagram of an on-board power battery performance estimation device in one embodiment;

[0058] Figure 6 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0060] The vehicle-mounted power battery performance estimation method provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, terminal 102 acquires real-time operating parameters of the vehicle's power battery, including nuclear charge, temperature, and voltage. Terminal 102 communicates with server 104 via a network, sending the acquired real-time operating parameters to server 104, which processes the parameters and performs real-time performance estimation of the vehicle's power battery. A data storage system stores the data processed by server 104. This system can be integrated onto server 104 or hosted on a cloud or other network server. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, and smart in-vehicle devices. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted devices. Server 104 can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0061] In one embodiment, such as Figure 2 As shown, a method for estimating the performance of an on-board power battery is provided, and this method is applied to... Figure 1 Taking server 104 as an example, the following steps are included:

[0062] Step 202: Obtain the real-time charging current and real-time discharging current of the power battery, and determine the real-time operating status of the power battery based on the real-time charging current and real-time discharging current.

[0063] First, it needs to be explained that the charging process of a power battery refers to the process of converting electrical energy input from an external circuit into chemical energy for storage, while the discharging process refers to the process of converting the stored chemical energy into electrical energy for output. Therefore, the operating states of a power battery include discharging, charging, and resting states.

[0064] The charging current of the power battery refers to the current size input by an external circuit to the power battery during the charging process; the discharging current refers to the current size output by the power battery during the discharging process. The real-time charging current and the real-time discharging current can be detected by a current detector, or can be directly obtained from a battery management system. The application does not make a specific limitation on the acquisition method of the real-time charging current and the real-time discharging current.

[0065] It should be noted that the working state of the power battery at any time can only be one, that is, the power battery can only be in the charging state, or only in the discharging state, or in the static state, and cannot exist in two or more working states at the same time. When the charging current is 0, the nonexistence of the charging current indicates that the power battery is not in the charging state. By analogy, the real-time working state of the power battery can be determined by the size of the real-time charging current and the real-time discharging current. For example, when the real-time charging current is greater than 0 and the real-time discharging current is 0, the working state of the power battery is the charging state; when the real-time charging current is 0 and the real-time discharging current is greater than 0, the working state of the power battery is the discharging state; when the real-time charging current and the real-time discharging current are both 0, the working state of the power battery is the static state.

[0066] Step 204, in the case where the real-time working state is the discharging state or the charging state, determining the real-time energy pool value of the power battery according to the real-time nuclear charge number and the real-time temperature of the power battery;

[0067] The nuclear charge number refers to the state of charge of the power battery, which is used to reflect the remaining capacity of the battery and is defined as the ratio of the remaining capacity to the total capacity of the battery. The temperature refers to the temperature of the power battery during work, which can be collected from the surface of the power battery or from the inside of the power battery. The application does not make a specific limitation on this. The power battery stores chemical energy. If the power battery is regarded as an energy pool, the real-time energy pool value of the power battery represents the size of the energy stored in the power battery determined in real time.

[0068] Specifically, taking the charging process as an example, after the real-time nuclear charge number BP SOC and the real-time temperature BP Temp are obtained, the real-time absorption current I SOC , the allowed peak charging current I Temp , and the allowed peak charging time T absorb of the power battery are determined according to the real-time nuclear charge number BP ChgPeak and the real-time temperature BP ChgPeak in combination with the calibration parameters provided by the power battery manufacturer; then the real-time absorption current I absorb , the allowed peak charging current I ChgPeak , and the allowed peak charging time T ChgPeakDetermine the size of the working energy pool As during the charging process Bf Finally, determine the real-time value of the energy pool of the power battery during the charging process according to the real-time charging current size of the power battery and As Bf The absorption current refers to the current that can be absorbed by the power battery under the charging current, that is, the current that can be converted into chemical energy; the allowed peak charging current refers to the maximum charging current allowed by the power battery.

[0069] In the above process, the allowed continuous charging current I SOC of the power battery can be obtained first by the nuclear charge number BP Temp and the real-time temperature BP ChgRated = MAP ChgRated (BP SOC , BP Temp ), and then the real-time absorption current is determined according to the correction coefficient of the allowed continuous charging current, for example, I absorb = I ChgRated *Pct chgRatiocrt , wherein the correction coefficient can be obtained by calibration test or can be artificially set to a fixed value. The allowed continuous charging current refers to the current during the continuous charging allowed by the power battery.

[0070] Step 206, determine the real-time working limit percentage of the power battery according to the real-time value of the energy pool;

[0071] The working limit percentage is used to describe the working degree of the power battery, for example, in the discharging process, the real-time discharging current is the percentage of the peak charging current allowed by the power battery. The corresponding relationship between the real-time value of the energy pool and the real-time working limit percentage can be determined by calibration test, for example, according to the test to determine the calibration MAP(As RT ) figure, when the performance of the power battery is estimated in real time, the real-time working limit percentage of the power battery is determined by the real-time value of the energy pool in the MAP(As RT ) figure.

[0072] It should be noted that the size of the working limit percentage of the power battery can be affected by multiple working safety parameters of the power battery, at this time, the corresponding working limit sub-percentage under the influence of the real-time value of each working safety parameter can be analyzed, and then the real-time working limit percentage of the power battery is determined according to the corresponding working limit sub-percentage of all working safety parameters. The working safety parameters can include nuclear charge number, voltage and single cell pressure difference.

[0073] Step 208, determine the real-time allowed working current value of the power battery according to the working limit percentage and the allowed peak working current of the power battery;

[0074] Specifically, in one embodiment, the real-time allowable operating current value I of the power battery is determined by the following formula. RT :

[0075] I RT =I Peak *Pct Ratio

[0076] Among them, I Peak Pct is the allowable peak operating current of the power battery. Ratio Percentage of work restrictions.

[0077] Step 210, based on the real-time allowable operating current I ChgRT To determine the real-time operating torque limit of the power battery.

[0078] The real-time allowable operating current represents the permitted operating current of the power battery at the current moment, i.e., the actual operating current. Based on the balance formula between electrical energy and mechanical energy, the real-time operating torque limit of the power battery is calculated. Specifically, by obtaining the speed and torque values ​​of the corresponding motor of the power battery at the previous moment, the operating efficiency of the power battery at the current moment can be determined. Then, combined with the real-time allowable operating current, the real-time operating torque limit of the power battery is determined.

[0079] Specifically, taking the discharge process as an example, based on the previous speed value Mtr of the power motor... BfSpd and the torque value Mtr at the previous moment BfTrq Look up the table to obtain the real-time power generation efficiency Mtr of the motor GenEff ,Right now:

[0080] Mtr GenEff =MAP(Mtr BfSpd Mtr BfTrq );

[0081] Then, the real-time drive torque limit of the power motor is:

[0082] Mtr DrvTrq =9550*Mtr DrvEff *BP V *I DisChgRT / Mtr RTSpd ;

[0083] Among them, BP V I represents the voltage difference between individual cells of the power battery. DisChgRT This refers to the real-time allowable discharge current of the power battery.

[0084] The method provided in the above embodiments acquires the real-time charging current and real-time discharging current of the power battery, and determines the real-time operating state of the power battery based on the real-time charging current and real-time discharging current. When the real-time operating state is either discharging or charging, the real-time energy pool value of the power battery is determined based on the real-time nuclear charge and real-time temperature. Based on the real-time energy pool value, the real-time operating limit percentage of the power battery is determined. Based on the operating limit percentage and the allowable peak operating current of the power battery, the real-time allowable operating current value of the power battery is determined. Based on the real-time allowable operating current, the real-time operating torque limit value of the power battery is determined. Based on the instantaneous and peak discharge characteristics of the power battery, the real-time power release and power recovery speed of the power battery during charging and discharging are fitted, and the maximum allowable charging power or discharging power of the current power battery is estimated in real time. This maximizes the power absorption or release of the power battery and linearizes the control process, improving the accuracy of real-time performance estimation of the power battery. Simultaneously, because it is an uninterrupted charging and discharging condition, high-voltage power failure protection is avoided, ensuring vehicle driving safety.

[0085] In one embodiment, the real-time value of the power battery's energy pool is determined based on the real-time nuclear charge and real-time temperature of the power battery, including:

[0086] The working energy cell value As of the power battery is determined based on the real-time nuclear charge number and real-time temperature. Bf ;

[0087] The real-time energy pool value of the power battery is determined based on the working energy pool value.

[0088] Taking the discharge process as an example, in obtaining the real-time nuclear charge number BP SOC and real-time temperature BPT emp Then, based on the real-time nuclear charge number BP SOC and real-time temperature BPT emp Based on the calibration parameters provided by the power battery manufacturer, the real-time discharge current I of the power battery is determined. release Permissible peak discharge current I DischgPeak and the allowable peak discharge duration T DischgPeak Then, based on the real-time release current I... release Permissible peak discharge current I DischgPeak and the allowable peak discharge duration T DischgPeak Determine the working energy cell As during the discharge process Bf The size is ultimately determined based on the real-time discharge current of the power battery and As. Bf This determines the real-time energy level of the power battery during discharge. The allowable peak discharge current represents the maximum allowable discharge current of the power battery.

[0089] Specifically, based on the real-time release current I release, the allowed peak discharge current I DischgPeak , and the allowed peak discharge duration T DischgPeak ; determining the size of the working energy pool As Bf during the discharging process includes:

[0090] As Bf = (I DischgPeak -I release )*T DischgPeak ;

[0091] In the above process, the allowed continuous discharge current I SOC of the power battery can be obtained by the real-time nuclear charge number BP Temp and the real-time temperature BP DischgRated = MAP DischgRated (BP SOC , BP Temp ), and then the real-time release current is determined according to the correction coefficient of the allowed continuous discharge current, for example, I release = I DischgRated *Pct DischgRatioCrt , wherein the correction coefficient can be obtained by calibration test, or can be artificially set to a fixed value. The allowed continuous discharge current represents the current of the power battery allowed during continuous discharging.

[0092] In one embodiment, taking the discharging process as an example, determining the real-time value of the energy pool of the power battery according to the working energy pool value includes:

[0093] As RT = As Bf +I DisChg -I release ;

[0094] In the method provided by the above embodiment, the size of the real-time remaining energy of the power battery during the charging and discharging process is analyzed by the real-time nuclear charge number and the real-time temperature, which can reflect the maximum duration of a certain charging current or discharging current that the power battery can provide at any time, or the maximum charging current or discharging current at a certain duration, thereby providing quantitative parameter input for the predictive electric energy feedback or energy release of the whole vehicle.

[0095] In one embodiment, as shown in Figure 3 , the real-time working state is the charging state, and the allowed peak working current includes the allowed peak charging current; accordingly, determining the working energy pool value of the power battery according to the real-time nuclear charge number and the real-time temperature includes:

[0096] Step 302, determining the real-time absorption current and the allowed peak charging current of the power battery according to the real-time nuclear charge number and the real-time temperature;

[0097] Step 304, determining the working energy pool value of the power battery according to the real-time absorption current and the allowed peak charging current.

[0098] According to the above, the real-time absorption current and the allowed peak charging current of the power battery are determined according to the real-time nuclear charge number and the real-time temperature in a similar manner, which is not described here.

[0099] In the charging state, the working energy pool value As of the power battery during the charging process Bf :

[0100] As Bf =(I ChgPeak -I absorb )*T ChgPeak ;

[0101] Wherein, I absorb is the real-time absorption current of the power battery, I ChgPeak is the allowed peak charging current of the power battery, T ChgPeak is the allowed peak charging time of the power battery.

[0102] The method provided in the above embodiment can actually reflect the ability and speed of the power battery to convert electrical energy and chemical energy based on the real-time absorption current of the power battery, the real-time release current of the power battery, and the allowed peak charging current, the allowed peak discharging current, the allowed peak charging time, and the allowed peak discharging time. It provides a theoretical and data quantification basis for the management method of "energy pool".

[0103] In one of the embodiments, the real-time allowed working current includes the real-time allowed charging current I ChgRT ; accordingly, determining the real-time working torque limit value of the power battery according to the real-time allowed working current includes:

[0104] Mtr GenTrq =9550*BP V *I ChgRT / (Mtr RTSpd *Mtr GenEff );

[0105] Wherein, Mtr GenTrq is the real-time power generation torque limit value of the power motor corresponding to the power battery, BP V is the real-time voltage value of the power battery, I ChgRT is the real-time allowed charging current of the power battery, Mtr RTSpa is the real-time speed of the power motor corresponding to the power battery, Mtr GenEff is the real-time power generation efficiency of the power motor corresponding to the power battery.

[0106] The method provided in the above embodiment obtains the maximum allowable driving torque and the maximum allowable power generation torque of the power motor according to the energy conversion balance formula of electrical energy and mechanical energy, and the torque limit is used as a limit of the power motor request torque, so that the actual demand power of the power motor is ensured to be within the limit of the power provided by the power battery.

[0107] In one of the embodiments, as shown in Figure 4 the real-time working limit percentage of the power battery is determined according to the real-time value of the energy pool, including:

[0108] In step 402, the first real-time working limit sub-percentage corresponding to the real-time value of the energy pool is determined according to the real-time value of the energy pool.

[0109] In step 404, the real-time value of the working safety parameter of the power battery is obtained, and the second real-time working limit sub-percentage corresponding to the real-time value of the working safety parameter is determined according to the real-time value of the working safety parameter.

[0110] In step 406, the real-time working limit percentage of the power battery is determined according to the first real-time working limit sub-percentage and the second real-time working limit sub-percentage.

[0111] For the performance protection of the power battery, the working limit percentage of the power battery is limited by multiple working safety parameters of the power battery, such as the nuclear charge number, the voltage, and the single cell pressure difference. The real-time value of the energy pool is determined according to the real-time nuclear charge number and the real-time temperature, so that the real-time value of the energy pool has a corresponding relationship with the working limit percentage. Therefore, the first real-time working limit sub-percentage is determined according to the real-time value of the energy pool. Specifically, the first real-time working limit sub-percentage corresponding to the real-time value of the energy pool can be found in the mapping relationship table of the real-time value of the energy pool and the real-time working limit sub-percentage. It should be noted that the first real-time working limit sub-percentage corresponding to the real-time value of the energy pool can be a specific value or a range.

[0112] In one embodiment, the working safety parameters include the nuclear charge number, the voltage, and the single cell pressure difference. Specifically, the process of obtaining the second real-time working limit sub-percentage corresponding to each working safety parameter includes:

[0113] (1) Nuclear charge number influence: Pct SOCChgRatio = MAP(BP SOC ), Pct SOCDisChgRatio = MAP(BP SPC ) are determined through calibration test, so as to obtain the real-time charge limit sub-percentage Pct SPCCiscRatio and the real-time discharge limit sub-percentage Pct SOCDisChgRatio of the power battery under the influence of the real-time nuclear charge number of the power battery; when BP SOC is greater than the charge cutoff nuclear charge number, PctSOCChgRatio decreases to 0 when BP SOC is less than the discharge cut-off nuclear charge number, Pct SOCDisChgRatio decreases to 0;

[0114] (2) Voltage influence: Pct BPVChgRatio = MAP(BP V ), Pct BPVDisChgRatio = MAP(BP V ) are determined through calibration tests, so as to obtain the real-time charging limit sub-percent Pct BPVChgRatio of the power battery under the influence of the real-time voltage of the power battery, the real-time discharge sub-percent Pct BPVDisChgRatio of the power battery under the influence of the real-time voltage of the power battery; when BP V is greater than the charging cut-off voltage, Pct BPVChgRatio decreases to 0, when BP V is less than the discharge cut-off voltage, Pct BPVDisChgRatio decreases to 0;

[0115] (3) Single cell pressure difference influence: Pct CellDiffVChgRatio = MAP(BP CellDiffV ), Pct CellDiffVgisChgRatio = MAP(BP CellDiffV ) are determined through calibration tests, so as to obtain the real-time charging limit sub-percent Pct CellDiffVChgRatio of the power battery under the influence of the single cell pressure difference of the power battery, the real-time discharge limit sub-percent Pct CellDiffVDisChgRatio of the power battery under the influence of the single cell pressure difference of the power battery; when BP CellDiffV is greater than the charging cut-off single cell pressure difference value, Pct CellDiffVChgRatio decreases to 0, when BP CellDiffV is less than the discharge cut-off nuclear charge number, Pct CellDiffVDisChgRatio decreases to 0;

[0116] After all the working limit sub-percent is determined, the real-time working limit percentage of the power battery is determined through multiple working safety parameters, for example, for the above content, the real-time charging limit percentage of the charging process:

[0117] Pct ChgRatio = Pct SOCChgRatio * Pct BPVChgRatio * Pct CellDiffVChgRatio * Pct AsChgRatio ;

[0118] The real-time discharge limit percentage of the discharging process:

[0119] Pct DisChgRatio = Pct SOCDisChgRatio * Pct BPVDisChgRatioPct CellDiffVDisChgRatio Pct AsDischgRatio ;

[0120] The method provided by the above embodiment can conveniently and intuitively realize the charge protection of the power battery under high SOC, high voltage and high single-cell pressure difference, and the discharge protection of the power battery under low SOC, low voltage and high single-cell pressure difference, and maximally ensure the safety of the power battery.

[0121] In one of the embodiments, the method further comprises:

[0122] In the case that the real-time working state is the static state, the energy pool real-time value obtained at the last time when the working state of the power battery is converted to the static state is taken as the energy pool real-time value of the static state;

[0123] The energy pool real-time value corresponding to the static state is compared with the energy pool preset value of the power battery, and a third real-time working limit sub-percent corresponding to the static state is determined according to the comparison result;

[0124] The third real-time working limit sub-percent corresponding to the static state is taken as the initial value of the first real-time working limit sub-percent when the working state of the power battery is converted from the static state to the charging state or the discharging state.

[0125] The static state refers to the state that the power battery is neither charged nor discharged, that is, the state of not working. At this time, the energy pool real-time value obtained at the last time when the working state is converted to the static state is taken as the energy pool real-time value of the static state, for example, the energy pool real-time value determined at the last time of the previous charging process or the energy pool real-time value determined at the last time of the previous discharging process. The energy pool real-time value corresponding to the static state is compared with the energy pool preset value of the power battery, and a third real-time working limit sub-percent corresponding to the static state is determined according to the comparison result.

[0126] For example, the balance value of the "energy pool" in the static state of the power battery is the size of the "discharge energy pool" As Balance = (I DischgPeak -I release )*T DischgPeak , and the maximum value of the "energy pool" is As Max = (I DischgPeak -I release )*T DischgPeak + (I ChgPeak -I absorb )*T ChgPeak .

[0127] When the power battery is in a static state, when AS RT <As Balance , AS RT increases at a speed of I release until As Balance ; when As RT > As Balance , As RT decreases at a speed of I absorb until As Balance ; when As RT > As Balance , Pct AsDischgRatio takes the maximum value, PCt AsChgRatio decreases with the increase of As RT , when As RT = As Max , Pct AsChgRatio decreases to 0; when As RT < As Balance , Pct AsChgRatio takes the maximum value, PCt AsDischgRatio decreases with the decrease of As RT , when As RT = 0, Pct AsDisChgRatio decreases to 0; when As RT = AS Balance , Pct AsDischgRatio , PCt AsCngRatio are all maximum values. In this way, the real-time value of the energy pool of the power battery in the static state and the corresponding third real-time working limit sub-percent can be determined.

[0128] In the method provided by the above embodiment, the size of the energy pool of the power battery in the static state is determined by the real-time value at the previous moment, so that the real-time value at the initial moment can be quickly and accurately determined when the state of the power battery changes.

[0129] It should be understood that, although each step in the flowchart involved in each of the above embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each of the above embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or steps or stages in other steps.

[0130] Based on the same inventive concept, the embodiment of the present application also provides a vehicle-mounted power battery performance estimation device for implementing the vehicle-mounted power battery performance estimation method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more vehicle-mounted power battery performance estimation device embodiments provided below can refer to the limitations of the vehicle-mounted power battery performance estimation method described above, which will not be repeated here.

[0131] In one embodiment, as shown in Figure 5 A vehicle-mounted power battery performance estimation device is provided, comprising: a state determination module 501, an energy pool calculation module 502, a first determination module 503, a second determination module 504, and a third determination module 505, wherein:

[0132] The state determination module 501 is configured to obtain a real-time charging current and a real-time discharging current of the power battery, and determine a real-time working state of the power battery according to the real-time charging current and the real-time discharging current.

[0133] The energy pool calculation module 502 is configured to determine a real-time value of an energy pool of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery when the real-time working state is a discharging state or a charging state.

[0134] The first determination module 503 is configured to determine a real-time working limit percentage of the power battery according to the real-time value of the energy pool.

[0135] The second determination module 504 is configured to determine a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery.

[0136] The third determination module 505 is configured to determine a real-time working torque limit value of the power battery according to the real-time allowable working current.

[0137] In one embodiment, the energy pool calculation module 502 is further configured to:

[0138] determine a working energy pool value of the power battery according to the real-time nuclear charge number and the real-time temperature; and

[0139] determine the real-time value of the energy pool of the power battery according to the working energy pool value.

[0140] In one embodiment, the energy pool calculation module 502 is further configured to:

[0141] determine a real-time absorption current and an allowable peak charging current of the power battery according to the real-time nuclear charge number and the real-time temperature; and

[0142] determine the working energy pool value of the power battery according to the real-time absorption current and the allowable peak charging current.

[0143] In one embodiment, the third determining module 505 is further configured to:

[0144] Mtr GenTrq = 9550 * BP V * I ChgRT / (Mtr RTSpd * Mtr GenEff ) ;

[0145] wherein Mtr GenTrq is a real-time generation torque limit value of the power motor corresponding to the power battery, BP V is a real-time voltage value of the power battery, I ChgRT is a real-time allowable charging current of the power battery, Mtr rRTSpd is a real-time speed of the power motor corresponding to the power battery, and Mtr GenEff is a real-time generation efficiency of the power motor corresponding to the power battery.

[0146] In one embodiment, the first determining module 503 is further configured to:

[0147] determine a corresponding first real-time working limit sub-percentage according to the real-time value of the energy pool;

[0148] obtain a real-time value of a working safety parameter of the power battery, and determine a corresponding second real-time working limit sub-percentage according to the real-time value of the working safety parameter;

[0149] determine a real-time working limit percentage of the power battery according to the first real-time working limit sub-percentage and the second real-time working limit sub-percentage.

[0150] In one embodiment, the vehicle-mounted power battery performance estimation device further comprises a static state processing module configured to:

[0151] in a case where the real-time working state is a static state, taking the real-time value of the energy pool obtained at the last time when the working state of the power battery is converted to the static state as the real-time value of the energy pool in the static state;

[0152] comparing the real-time value of the energy pool corresponding to the static state with a preset value of the energy pool of the power battery, and determining a third real-time working limit sub-percentage corresponding to the static state according to a comparison result;

[0153] wherein the third real-time working limit sub-percentage corresponding to the static state is taken as an initial value of the first real-time working limit sub-percentage when the working state of the power battery is converted from the static state to the charging state or the discharging state.

[0154] The modules in the vehicle-mounted power battery performance estimation device can be realized by software, hardware, or a combination thereof, in whole or in part. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in the computer device in software form, so that the processor can call and execute the operations corresponding to the modules.

[0155] In one embodiment, a computer device, which can be a server, has an internal structure as shown in Figure 6 The computer device includes a processor, a memory, and a network interface connected by a system bus. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for running the operating system and the computer program in the non-volatile storage medium. The database of the computer device is configured to store working parameter data and calibration data of the power battery. The network interface of the computer device is configured to communicate with an external terminal through a network connection. The computer program, when executed by the processor, implements a vehicle-mounted power battery performance estimation method.

[0156] Those skilled in the art can understand that Figure 6 The structure shown in the above embodiment is only a block diagram of part of the structure related to the scheme of the present application, and does not limit the computer device to which the scheme of the present application is applied. Specifically, the computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0157] In one embodiment, a computer device includes a memory and a processor. The memory stores a computer program. The processor executes the computer program to implement the following steps:

[0158] Obtain a real-time charging current and a real-time discharging current of the power battery, and determine a real-time working state of the power battery according to the real-time charging current and the real-time discharging current;

[0159] In a case where the real-time working state is a discharging state or a charging state, determine a real-time energy pool value of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery;

[0160] Determine a real-time working limit percentage of the power battery according to the real-time energy pool value;

[0161] Determine a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery;

[0162] Determine a real-time working torque limit value of the power battery according to the real-time allowable working current.

[0163] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0164] According to the real-time nuclear charge number and the real-time temperature, the working energy pool value of the power battery is determined;

[0165] According to the working energy pool value, the energy pool real-time value of the power battery is determined.

[0166] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0167] According to the real-time nuclear charge number and the real-time temperature, the real-time absorption current and the allowed peak charging current of the power battery are determined;

[0168] According to the real-time absorption current and the allowed peak charging current, the working energy pool value of the power battery is determined.

[0169] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0170] Mtr GenTrq = 9550 * BP V *I ChgRT / (Mtr RTSpd *Mtr GenEff );

[0171] Wherein, Mtr GenTrq is the real-time power generation torque limit value of the power motor corresponding to the power battery, BP V is the real-time voltage value of the power battery, I ChgRT is the real-time allowed charging current of the power battery, Mtr RTSpd is the real-time speed of the power motor corresponding to the power battery, Mtr GenRff is the real-time power generation efficiency of the power motor corresponding to the power battery.

[0172] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0173] According to the energy pool real-time value, a corresponding first real-time working limit sub-percentage is determined;

[0174] Obtain the working safety parameter real-time value of the power battery, and according to the working safety parameter real-time value, a corresponding second real-time working limit sub-percentage is determined;

[0175] According to the first real-time working limit sub-percentage and the second real-time working limit sub-percentage, the real-time working limit percentage of the power battery is determined.

[0176] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0177] In the case that the real-time working state is the static state, the energy pool real-time value of the power battery at the last time when the working state is converted to the static state is taken as the energy pool real-time value of the static state;

[0178] The energy pool real-time value corresponding to the static state is compared with the energy pool preset value of the power battery, and a third real-time working limit sub-percent corresponding to the static state is determined according to the comparison result;

[0179] The third real-time working limit sub-percent corresponding to the static state is taken as the initial value of the first real-time working limit sub-percent when the working state of the power battery is converted from the static state to the charging state or the discharging state.

[0180] In an embodiment, a computer readable storage medium is provided, and a computer program is stored on the computer readable storage medium. The computer program is executed by a processor to implement the following steps:

[0181] The real-time charging current and the real-time discharging current of the power battery are obtained, and the real-time working state of the power battery is determined according to the real-time charging current and the real-time discharging current;

[0182] In the case that the real-time working state is the discharging state or the charging state, the energy pool real-time value of the power battery is determined according to the real-time nuclear charge number and the real-time temperature of the power battery;

[0183] The real-time working limit percentage of the power battery is determined according to the energy pool real-time value;

[0184] The real-time allowable working current value of the power battery is determined according to the working limit percentage and the allowable peak working current of the power battery;

[0185] The real-time working torque limit value of the power battery is determined according to the real-time allowable working current.

[0186] In an embodiment, the computer program is executed by the processor to further implement the following steps:

[0187] The working energy pool value of the power battery is determined according to the real-time nuclear charge number and the real-time temperature;

[0188] The energy pool real-time value of the power battery is determined according to the working energy pool value.

[0189] In an embodiment, the computer program is executed by the processor to further implement the following steps:

[0190] The real-time absorption current and the allowable peak charging current of the power battery are determined according to the real-time nuclear charge number and the real-time temperature;

[0191] According to the real-time absorption current and the allowed peak charging current, the working energy pool value of the power battery is determined.

[0192] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0193] Mtr GenTrq = 9550 * BP V * I ChgRT / (Mtr RTSpd * Mtr GenEff );

[0194] Wherein, Mtr GenTrq is the real-time power generation torque limit value of the power motor corresponding to the power battery, BP V is the real-time voltage value of the power battery, I ChgRT is the real-time allowed charging current of the power battery, Mtr RTSpd is the real-time speed of the power motor corresponding to the power battery, Mtr GenEff is the real-time power generation efficiency of the power motor corresponding to the power battery.

[0195] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0196] According to the real-time energy pool value, a corresponding first real-time working limit sub-percentage is determined;

[0197] Obtain the real-time value of the working safety parameter of the power battery, and according to the real-time value of the working safety parameter, a corresponding second real-time working limit sub-percentage is determined;

[0198] According to the first real-time working limit sub-percentage and the second real-time working limit sub-percentage, the real-time working limit percentage of the power battery is determined.

[0199] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0200] In the case that the real-time working state is the static state, the energy pool real-time value obtained at the last time when the working state of the power battery is converted to the static state is taken as the energy pool real-time value of the static state;

[0201] The energy pool real-time value corresponding to the static state is compared with the energy pool preset value of the power battery, and according to the comparison result, a third real-time working limit sub-percentage corresponding to the static state is determined;

[0202] Wherein, the third real-time working limit sub-percentage corresponding to the static state is taken as the initial value of the first real-time working limit sub-percentage when the working state of the power battery is converted from the static state to the charging state or the discharging state.

[0203] In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the following steps:

[0204] obtaining a real-time charging current and a real-time discharging current of the power battery, and determining a real-time working state of the power battery according to the real-time charging current and the real-time discharging current;

[0205] in a case where the real-time working state is a discharging state or a charging state, determining a real-time energy pool value of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery;

[0206] determining a real-time working limit percentage of the power battery according to the real-time energy pool value;

[0207] determining a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery;

[0208] determining a real-time working torque limit value of the power battery according to the real-time allowable working current.

[0209] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0210] determining a working energy pool value of the power battery according to the real-time nuclear charge number and the real-time temperature;

[0211] determining the real-time energy pool value of the power battery according to the working energy pool value.

[0212] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0213] determining a real-time absorption current and an allowable peak charging current of the power battery according to the real-time nuclear charge number and the real-time temperature;

[0214] determining the working energy pool value of the power battery according to the real-time absorption current and the allowable peak charging current.

[0215] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0216] Mtr GenTrq = 9550 * BP V * I ChgRT / (Mtr RTSpd * Mtr GenEff );

[0217] wherein Mtr GenTrq is a real-time power generation torque limit value of a power motor corresponding to the power battery, BP V is a real-time voltage value of the power battery, and I ChgRTMtr RTSpd Mtr GenEff Mtr

[0218] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0219] According to the real-time value of the energy pool, a corresponding first real-time working limit sub-percentage is determined;

[0220] Obtaining a real-time value of a working safety parameter of the power battery, and according to the real-time value of the working safety parameter, a corresponding second real-time working limit sub-percentage is determined;

[0221] According to the first real-time working limit sub-percentage and the second real-time working limit sub-percentage, a real-time working limit percentage of the power battery is determined.

[0222] In one embodiment, the computer program, when executed by the processor, further implements the following steps:

[0223] In the case that the real-time working state is the static state, the real-time value of the energy pool obtained at the last time when the working state of the power battery is converted to the static state is taken as the real-time value of the energy pool in the static state;

[0224] The real-time value of the energy pool corresponding to the static state is compared with the preset value of the energy pool of the power battery, and according to the comparison result, a third real-time working limit sub-percentage corresponding to the static state is determined;

[0225] The third real-time working limit sub-percentage corresponding to the static state is taken as the initial value of the first real-time working limit sub-percentage when the working state of the power battery is converted from the static state to the charging state or the discharging state.

[0226] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0227] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0228] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for estimating performance of a vehicle-mounted power battery, characterized in that, The method comprises: acquiring a real-time charging current and a real-time discharging current of the power battery, and determining a real-time working state of the power battery according to the real-time charging current and the real-time discharging current; in a case where the real-time working state is a discharging state or a charging state, determining a real-time energy pool value of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery; determining a real-time working limit percentage of the power battery according to the real-time energy pool value; determining a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery; determining a real-time working torque limit value of the power battery according to the real-time allowable working current.

2. The method of claim 1, wherein, The determination of the real-time energy pool value of the power battery according to the real-time nuclear charge number and the real-time temperature of the power battery comprises: determining a working energy pool value of the power battery according to the real-time nuclear charge number and the real-time temperature; determining the real-time energy pool value of the power battery according to the working energy pool value.

3. The method of claim 2, wherein, The real-time working state is a charging state, and the allowable peak working current comprises an allowable peak charging current; correspondingly, the determination of the working energy pool value of the power battery according to the real-time nuclear charge number and the real-time temperature comprises: determining a real-time absorption current and an allowable peak charging current of the power battery according to the real-time nuclear charge number and the real-time temperature; determining the working energy pool value of the power battery according to the real-time absorption current and the allowable peak charging current.

4. The method of claim 3, wherein, The real-time allowable working current comprises a real-time allowable charging current; correspondingly, the determination of the real-time working torque limit value of the power battery according to the real-time allowable working current comprises: ； wherein, a real-time generated torque limit value of a power motor corresponding to the power battery, a real-time voltage value of the power battery, a real-time allowable charging current of the power battery, a real-time rotating speed of the power motor corresponding to the power battery, a real-time generated efficiency of the power motor corresponding to the power battery.

5. The method of claim 1, wherein, The determination of the real-time working limit percentage of the power battery according to the real-time energy pool value comprises: determining a corresponding first real-time working limit sub-percentage according to the real-time energy pool value; acquiring a working safety parameter real-time value of the power battery, and determining a corresponding second real-time working limit sub-percentage according to the working safety parameter real-time value; determining the real-time working limit percentage of the power battery according to the first real-time working limit sub-percentage and the second real-time working limit sub-percentage.

6. The method of claim 1, wherein, The method further comprises: in a case where the real-time working state is a static state, taking an energy pool real-time value acquired at a last time when the working state of the power battery is converted into the static state as an energy pool real-time value in the static state; comparing the energy pool real-time value corresponding to the static state with an energy pool preset value of the power battery, and determining a third real-time working limit sub-percentage corresponding to the static state according to a comparison result; wherein the third real-time working limit sub-percentage corresponding to the static state is taken as an initial value of a first real-time working limit sub-percentage when the working state of the power battery is converted from the static state into a charging state or a discharging state.

7. An on-vehicle power storage device performance estimation device characterized by comprising: The device comprises: A state determining module is configured to acquire a real-time charging current and a real-time discharging current of the power battery, and determine a real-time working state of the power battery according to the real-time charging current and the real-time discharging current; An energy pool calculating module is configured to determine an energy pool real-time value of the power battery according to a real-time nuclear charge number and a real-time temperature of the power battery when the real-time working state is a discharging state or a charging state; A first determining module is configured to determine a real-time working limit percentage of the power battery according to the energy pool real-time value; A second determining module is configured to determine a real-time allowable working current value of the power battery according to the working limit percentage and an allowable peak working current of the power battery; A third determining module is configured to determine a real-time working torque limit value of the power battery according to the real-time allowable working current. 8.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-7. The processor executes the computer program to implement the steps of the method in any one of claims 1 to 6.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 6.

Images