Battery charge and discharge management method and battery charge and discharge management system

Abstract

The present invention discloses a battery charge and discharge management method and a battery charge and discharge management system, which relate to the field of battery charge and discharge. The method comprises a management center, wherein the management center is communicatively connected to a data acquisition module, a data processing module, a charge and discharge evaluation module, a charge and discharge comprehensive evaluation module, a charge and discharge correction module, and a charge and discharge strategy adjustment module; the data acquisition module is used to collect operating parameters, performance parameters, and battery status, and periodically collect charge and discharge data; the data processing module is used to obtain the charge and discharge rate; the charge and discharge evaluation module is used to generate a charge and discharge evaluation coefficient; the charge and discharge comprehensive evaluation module is used to comprehensively analyze the number of charge and discharge times and the corresponding charge and discharge evaluation coefficient; the charge and discharge correction module is used to correct the loss factor of charge and discharge; and the charge and discharge strategy adjustment module is used to adjust the charging voltage safety threshold interval and the discharge current safety threshold interval, dynamically adjust the battery charge and discharge strategy, and extend the battery life.

Description

Technical Field

[0001] The present invention relates to the field of battery charging and discharging, and in particular to a battery charging and discharging management method and a battery charging and discharging management system. Background Art

[0002] During the use of the battery, it needs to undergo multiple cycles of charge and discharge. The longer the battery is used and the more charge and discharge cycles it undergoes, the faster the battery life decreases. Overcharge and over-discharge are prone to occur during the battery charge and discharge process, which can easily accelerate the reduction of the battery life.

[0003] In the existing technology, simply monitoring parameters such as voltage and current is not enough to timely and effectively detect problems in battery operation. Each charge and discharge process of the battery will affect its own life. How to determine the safe range of battery charge and discharge based on the actual life of the battery and extend the service life of the battery is a problem we need to solve. To this end, a battery charge and discharge management method and a battery charge and discharge management system are now provided. Summary of the Invention

[0004] In order to solve the above technical problems, the object of the present invention is to provide a battery charge and discharge management system, including a management center, wherein the management center is communicatively connected to a data acquisition module, a data processing module, a charge and discharge evaluation module, a charge and discharge comprehensive evaluation module, a charge and discharge correction module, and a charge and discharge strategy adjustment module;

[0005] The data acquisition module includes a data acquisition terminal, a charge and discharge recording unit, and a state of charge acquisition unit. The data acquisition terminal is used to collect operating parameters and performance parameters of the battery. The charge and discharge recording unit is used to periodically collect charge and discharge data of the battery. The state of charge acquisition unit is used to obtain the battery status.

[0006] The data processing module is used to process the operating parameters and charge and discharge data to obtain the charge and discharge rate of the battery;

[0007] The charge and discharge evaluation module includes a charge evaluation unit and a discharge evaluation unit. The charge evaluation unit is used to analyze the battery charging rate and charging time to generate a charge evaluation coefficient of the battery. The discharge evaluation unit is used to analyze the battery discharge rate and discharge time to generate a discharge evaluation coefficient of the battery.

[0008] The charge and discharge comprehensive evaluation module is used to comprehensively analyze the number of charge and discharge times of the battery within the evaluation period and the corresponding charge and discharge evaluation coefficients to obtain an analysis result. If the analysis result is abnormal, a battery charge and discharge abnormality signal is generated;

[0009] The charge and discharge correction module is used to correct the loss factor of the battery charge and discharge according to the abnormal charge and discharge signal of the battery and generate a correction coefficient;

[0010] The charge and discharge strategy adjustment module is used to adjust the battery charging voltage safety threshold range and the discharge current safety threshold range according to the correction coefficient, and to manage the charge and discharge of the battery.

[0011] Furthermore, the data acquisition module collects the operating parameters and performance parameters of the battery, periodically collects the charge and discharge data of the battery, and obtains the battery status in the following process:

[0012] The operating parameters include charging voltage value, charging current value and discharging current value;

[0013] The performance parameters include the initial capacity of the battery and the initial remaining capacity of the battery;

[0014] The charge and discharge data includes the number of charge and discharge times and the charge and discharge duration;

[0015] The battery state includes a charging state and a discharging state;

[0016] Set an evaluation period and obtain the number of battery charges, charging duration, and charging start and end times within the evaluation period;

[0017] The number of discharges, discharge duration, discharge start time, and discharge end time of a battery that has a charge-discharge association relationship with the battery charging are obtained.

[0018] Furthermore, the data processing module processes the operating parameters and the charge and discharge data to obtain the charge and discharge rate of the battery, including:

[0019] Obtain the actual remaining capacity of the battery after charging and discharging within the evaluation period, and generate a corresponding curve of the actual remaining capacity value change;

[0020] Obtain the theoretical remaining capacity value of the battery according to the initial remaining capacity of the battery and the charge and discharge capacity, and generate a corresponding theoretical remaining capacity value change curve;

[0021] Construct a two-dimensional coordinate system of time with respect to power value;

[0022] Mapping the generated actual remaining power value change curve and theoretical remaining power value change curve into a two-dimensional coordinate system;

[0023] Set a number of sample points in a two-dimensional coordinate system and obtain the slope value of each change curve corresponding to each sample point;

[0024] The actual charging rate, actual discharging rate, theoretical charging rate and theoretical discharging rate of the battery are obtained according to the obtained slope value.

[0025] Furthermore, the charging evaluation unit obtains a theoretical charging rate and an actual charging rate within the evaluation period according to the actual remaining power change curve and the theoretical remaining power change curve within the evaluation period;

[0026] Obtaining a theoretical charging evaluation coefficient and an actual charging evaluation coefficient corresponding to the battery according to the obtained theoretical charging rate and actual charging rate;

[0027] The discharge evaluation unit obtains the theoretical discharge rate and the actual discharge rate within the evaluation period according to the actual remaining power change curve and the theoretical remaining power change curve within the evaluation period;

[0028] According to the obtained theoretical discharge rate and actual discharge rate, a theoretical discharge evaluation coefficient and an actual discharge evaluation coefficient corresponding to the battery are obtained.

[0029] Furthermore, the process of the charge and discharge comprehensive evaluation module comprehensively analyzing the number of charge and discharge times of the battery within the evaluation period and the corresponding charge and discharge evaluation coefficients includes:

[0030] Obtaining a theoretical charge and discharge evaluation coefficient and an actual charge and discharge evaluation coefficient of the battery according to a theoretical charge evaluation coefficient and an actual charge evaluation coefficient of each charge of the battery and a theoretical discharge evaluation coefficient and an actual discharge evaluation coefficient of each discharge that have a charge and discharge correlation relationship with each charge of the battery;

[0031] And obtain the theoretical charge and discharge comprehensive evaluation coefficient and the actual charge and discharge comprehensive evaluation coefficient of the battery according to the theoretical charge and discharge evaluation coefficient and the actual charge and discharge evaluation coefficient of the battery during the evaluation period;

[0032] When the theoretical charge and discharge comprehensive evaluation coefficient of the battery is equal to the actual charge and discharge comprehensive evaluation coefficient, a battery charge and discharge normal signal is generated;

[0033] When the theoretical charge and discharge comprehensive evaluation coefficient of the battery is greater than the actual charge and discharge comprehensive evaluation coefficient, a battery charge and discharge abnormality signal is generated.

[0034] Furthermore, the charge and discharge correction module is used to correct the loss factor of the battery charge and discharge according to the abnormal charge and discharge signal of the battery. The process of generating the correction coefficient includes:

[0035] Obtaining a primary correction coefficient for battery charge and discharge based on the actual battery capacity and the initial battery capacity;

[0036] When a battery charge and discharge abnormality signal is received, a secondary correction coefficient for battery charge and discharge is obtained based on a theoretical charge and discharge cycle evaluation coefficient and an actual charge and discharge cycle evaluation coefficient;

[0037] The loss factor is corrected according to the correction coefficient so that the actual remaining power value change curve is consistent with the theoretical remaining power value change curve.

[0038] Furthermore, the process of the charge-discharge strategy module for adjusting the battery charging voltage safety threshold range and the discharge current safety threshold range according to the correction coefficient includes:

[0039] Set the charging voltage safety threshold range and the discharging current safety threshold range;

[0040] Adjusting the charging voltage safety threshold range and the discharging current safety threshold range according to the correction coefficient and the loss factor;

[0041] Obtain a charging voltage safety threshold adjustment interval and a discharging current safety threshold adjustment interval.

[0042] Furthermore, the process of the charge and discharge strategy module for managing the charge and discharge of the battery according to the adjusted battery charging voltage safety threshold range and discharge current safety threshold range includes:

[0043] Set the upper and lower limits of the charging voltage warning threshold to keep the charging voltage within the charging voltage safety threshold adjustment range;

[0044] Set the upper and lower limits of the charging current warning threshold to keep the charging current within the charging current safety threshold adjustment range.

[0045] In another embodiment of the present invention, the present invention further discloses a battery charge and discharge management method, comprising the following steps:

[0046] Step S1: Collecting the operating parameters and performance parameters of the battery, periodically collecting the battery charge and discharge data, and obtaining the battery status;

[0047] Step S2: Processing the operating parameters and charge and discharge data to obtain the charge and discharge rate of the battery;

[0048] Step S3: Evaluate the charge and discharge process of the battery according to the charge and discharge rate and charge and discharge duration of the battery, and generate a charge evaluation coefficient and a discharge evaluation coefficient of the battery;

[0049] Step S4: Comprehensively analyzing the number of charge and discharge times of the battery during the evaluation period and the corresponding charge and discharge evaluation coefficients to obtain an analysis result. If the analysis result is abnormal, a battery charge and discharge abnormality signal is generated.

[0050] Step S5: Correcting the battery charge and discharge loss factor according to the battery charge and discharge abnormality signal to generate a correction coefficient;

[0051] Step S6: adjusting the battery charging voltage safety threshold range and the discharge current safety threshold range according to the correction coefficient, and performing charge and discharge management on the battery.

[0052] Compared with the prior art, the beneficial effects of the present invention are as follows: according to the actual remaining power change curve and the theoretical remaining power change curve of the battery, the actual charge and discharge rate and the theoretical charge and discharge rate of the battery are obtained, the battery charge and discharge process is evaluated according to the evaluation period, each charge and discharge is evaluated according to the charge and discharge time and the charge and discharge rate to obtain a charge and discharge evaluation coefficient, and then the charge and discharge of the evaluation period is comprehensively evaluated to generate a theoretical charge and discharge comprehensive evaluation coefficient and an actual charge and discharge comprehensive evaluation coefficient, and analyze whether the battery charge and discharge are abnormal. If abnormal, the battery charge and discharge loss factor is corrected according to the charge and discharge comprehensive evaluation coefficient to obtain a correction coefficient, and the charging voltage safety range and the discharge current safety range are dynamically adjusted according to the correction coefficient, and the battery charge and discharge management is performed through the adjusted charging voltage safety range and discharge current safety range to extend the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a schematic diagram of a battery charge and discharge management system according to an embodiment of the present application.

[0054] Figure 2 This is a schematic diagram of a battery charge and discharge management method according to an embodiment of the present application. DETAILED DESCRIPTION

[0055] like Figure 1 As shown, the battery charge and discharge management system includes a management center, which is communicatively connected to a data acquisition module, a data processing module, a charge and discharge evaluation module, a charge and discharge comprehensive evaluation module, a charge and discharge correction module, and a charge and discharge strategy adjustment module;

[0056] The data acquisition module includes a data acquisition terminal, a charge and discharge recording unit, and a state of charge acquisition unit. The data acquisition terminal is used to collect operating parameters and performance parameters of the battery. The charge and discharge recording unit is used to periodically collect charge and discharge data of the battery. The state of charge acquisition unit is used to obtain the battery status.

[0057] The data processing module is used to process the operating parameters and charge and discharge data to obtain the charge and discharge rate of the battery;

[0058] The charging evaluation module is used to analyze the battery charging rate and charging time to generate a charging evaluation coefficient for the battery;

[0059] The discharge evaluation module is used to analyze the battery discharge rate and discharge duration to generate a discharge evaluation coefficient for the battery;

[0060] The charge and discharge cycle evaluation module is used to analyze the number of charge and discharge times of the battery within the evaluation cycle and the corresponding charge and discharge evaluation coefficient;

[0061] The charge and discharge adjustment module is used to adjust the battery charging voltage safety threshold range and the discharge current safety threshold range within the evaluation period according to the battery charging and discharging abnormality signal;

[0062] The charge and discharge strategy module is used to manage the charge and discharge of the battery according to the battery charging voltage safety threshold adjustment interval and the discharge current safety threshold adjustment interval.

[0063] The data acquisition module includes a data acquisition terminal, a charge and discharge recording unit, and a charge state acquisition unit;

[0064] The data acquisition terminal is used to collect operating parameters and performance parameters of the battery;

[0065] The operating parameters include charging voltage value, charging current value and discharging current value;

[0066] The charging voltage value is marked as U c ;

[0067] The charging current value is marked as I c ;

[0068] The discharge current value is marked as I f ;

[0069] The performance parameters include the initial capacity of the battery and the initial remaining capacity of the battery;

[0070] Mark the initial capacity of the battery as Rl;

[0071] The initial remaining capacity of the battery is marked as Cd;

[0072] The charge and discharge recording unit is used to periodically collect the charge and discharge data of the battery, and the charge and discharge data includes the number of charge and discharge times and the charge and discharge duration;

[0073] An evaluation period is set, where the evaluation period of the charge and discharge recording unit is recorded as T, the number of times the battery is charged during the evaluation period is recorded as n, and each charge is numbered as i, where i = 1, 2, ..., n, n ≥ 0, and n is an integer;

[0074] Get the charging time of the i-th charging, and record the charging time of the i-th charging as h i ;

[0075] Get the charging start time and charging end time of the i-th charging, marked as t i1 and t i2 ;

[0076] Obtain the number of discharges between the i-th charge and the i+1-th charge, denoted as m times, and label each discharge as j, where j = 1, 2, ..., m, m ≥ 0, and m is an integer;

[0077] It should be further explained that each discharge between the i-th charge and the i+1-th charge is associated with the i-th charge to generate a charge-discharge association relationship;

[0078] Obtain the discharge duration of the jth discharge that has a charge-discharge association relationship with the ith charge, as well as the corresponding discharge start time and discharge end time, and record the discharge duration as hi j , the discharge start time and discharge end time are respectively recorded as t ij1 and t ij2 ;

[0079] The state of charge acquisition unit is used to obtain the battery state, which includes the charging state and the discharging state.

[0080] The data processing module is used to process the operating parameters and charge and discharge data to obtain the charge and discharge rate of the battery. The specific process includes:

[0081] Get the charging capacity of the i-th charging within the evaluation period T, recorded as Q ci ;

[0082] but

[0083] Get the discharge capacity of the jth discharge that has a charge-discharge correlation relationship with the ith charge within the evaluation period T, recorded as Q fj ;

[0084] but

[0085] Get the actual remaining capacity of the battery after the i-th charge, recorded as Sd1;

[0086] Obtain the actual remaining capacity of the battery after the jth discharge that has a charge-discharge association relationship with the i-th charge, recorded as Sd2;

[0087] The theoretical remaining capacity of the battery is obtained based on the initial remaining capacity of the battery and the charging capacity, which is recorded as Ld;

[0088]

[0089] in, is the loss factor;

[0090] It should be further explained that when Q fj When Ld is equal to 0, it is the theoretical remaining charge value. f When it is not equal to 0, Ld is the theoretical discharge remaining capacity value;

[0091] Construct a two-dimensional coordinate system of time with respect to power value;

[0092] Generate a corresponding charging actual remaining power value variation curve based on the obtained charging actual remaining power value of the battery, generate a corresponding discharging actual remaining power value variation curve based on the obtained discharging actual remaining power value of the battery, and generate a theoretical remaining power value variation curve based on the obtained theoretical remaining power value of the battery;

[0093] Mapping the generated actual remaining power value change curve and theoretical remaining power value change curve into a two-dimensional coordinate system;

[0094] A number of sample points are set in a two-dimensional coordinate system, and the slope values on the respective change curves corresponding to the respective sample points are obtained. It should be further explained that a time interval jg is set, and a sample point is set every time interval jg;

[0095] According to the power value of each sample point, the slope value of the charging actual remaining power value change curve sample point is obtained, which is recorded as the actual charging rate v cs , obtain the tangent value of each point of the discharge actual remaining power value change curve, and record it as the actual discharge rate v fs , obtain the slope value of the sample point of the theoretical remaining power value change curve, and record it as the theoretical charging rate V cs And the theoretical discharge rate V fs , where s represents the time.

[0096] The charge and discharge evaluation module is used to analyze the battery charge and discharge rate and charge and discharge duration to generate a charge evaluation coefficient and a discharge evaluation coefficient for the battery. The specific process includes:

[0097] Setting up a charging evaluation unit and a discharging evaluation unit;

[0098] The charging evaluation unit analyzes the battery charging and discharging rate and charging and discharging time to generate a charging evaluation coefficient for the battery;

[0099] The discharge evaluation unit analyzes the battery discharge rate and discharge duration to generate a discharge evaluation coefficient of the battery;

[0100] The charging evaluation unit is based on the charging start time t corresponding to the i-th charging of the battery i1 and charging end time t i2 , take the absolute value of the difference between the theoretical charging rates of adjacent points in the theoretical remaining power value change curve segment, and record it as the theoretical charging rate difference VC ct , obtain the theoretical charging evaluation coefficient of the battery i-th charge, recorded as R1 i ;

[0101] but Among them, α1 is the evaluation factor;

[0102] The actual charging rate difference of adjacent points in the actual remaining power value change curve is taken as the absolute value, which is recorded as the actual charging rate difference vc ct , obtain the actual charging evaluation coefficient of the battery i-th charge, recorded as r1 i ;

[0103] but Among them, β1 is the evaluation factor;

[0104] The discharge evaluation unit is based on the charging start time t corresponding to the jth charging of the battery ij1 and charging end time t ij2 , take the absolute value of the difference between the theoretical discharge rates of adjacent points in the theoretical remaining power value change curve segment, and record it as the theoretical discharge rate difference VC ft , obtain the theoretical charge evaluation coefficient of the battery j times discharge, recorded as R2 ij ;

[0105] but Among them, α2 is the evaluation factor;

[0106] The actual charging rate difference of adjacent points in the discharge actual remaining power value change curve is taken as the absolute value, which is recorded as the actual charging rate difference vc ft , obtain the actual charging evaluation coefficient of the battery i-th charge, recorded as r2 ij ;

[0107] but Among them, β2 is the evaluation factor.

[0108] The charge and discharge comprehensive evaluation module is used to comprehensively analyze the number of charge and discharge times of the battery within the evaluation period and the corresponding charge and discharge evaluation coefficient to obtain an analysis result. If the analysis result is abnormal, a battery charge and discharge abnormality signal is generated. The specific process includes:

[0109] Perform a comprehensive evaluation of the battery charge and discharge during the evaluation period based on the charge evaluation coefficient generated by the battery charge evaluation module and the discharge evaluation coefficient generated by the battery discharge evaluation module;

[0110] According to the number of times the battery is charged n in the evaluation cycle and the number of times the battery is discharged m each time it is charged, the theoretical charging evaluation coefficient R1 of the battery i is obtained. i and actual charging evaluation coefficient r1 i And the theoretical discharge evaluation coefficient R2 for the jth discharge corresponding to the i-th charge of the battery ij and actual discharge evaluation coefficient r2 ij ;

[0111] Then the theoretical charge and discharge evaluation coefficient of the battery is obtained, recorded as Lg i ;

[0112] but Among them, γ1 is the evaluation factor;

[0113] Then the actual charge and discharge evaluation coefficient of the battery is obtained, recorded as Sg i ;

[0114] but Among them, γ2 is the evaluation factor;

[0115] And according to the charge and discharge evaluation coefficient of each charge and discharge of the battery in the evaluation cycle, the theoretical charge and discharge comprehensive evaluation coefficient of the battery is obtained, which is recorded as G;

[0116] but

[0117] Obtain the actual comprehensive evaluation coefficient of battery charge and discharge, denoted as g;

[0118] but

[0119] Comparing the theoretical charge and discharge comprehensive evaluation coefficient of the battery with the actual charge and discharge comprehensive evaluation coefficient, when the theoretical charge and discharge comprehensive evaluation coefficient of the battery is equal to the actual charge and discharge comprehensive evaluation coefficient, generating a battery charge and discharge normal signal;

[0120] When the theoretical charge and discharge comprehensive evaluation coefficient of the battery is greater than the actual charge and discharge comprehensive evaluation coefficient, a battery charge and discharge abnormality signal is generated.

[0121] The charge and discharge correction module is used to correct the loss factor of the battery charge and discharge according to the abnormal charge and discharge signal of the battery and generate a correction coefficient. The specific process includes:

[0122] Get the actual battery capacity sr of the battery;

[0123] According to the actual battery capacity sr and the initial battery capacity Rl, the first-level correction coefficient of the battery charge and discharge is obtained, which is recorded as f1;

[0124] Then f1=ρ1*(Rl-sr);

[0125] Among them, ρ1 is the correction factor;

[0126] When a battery charge and discharge abnormality signal is received, a secondary correction coefficient for battery charge and discharge is obtained based on the theoretical charge and discharge cycle evaluation coefficient and the actual charge and discharge cycle evaluation coefficient, which is recorded as f2;

[0127] Then f2=ρ2*(Gg);

[0128] Among them, ρ2 is the correction factor;

[0129] The loss factor is corrected according to the correction coefficient to obtain the corrected loss factor, which is recorded as

[0130] but

[0131] Make the charging theoretical remaining power value equal to the charging actual remaining power value and the discharging theoretical remaining power value equal to the discharging actual remaining power value.

[0132] The charge and discharge strategy module is used to adjust the battery charging voltage safety threshold range and the discharge current safety threshold range according to the correction coefficient, and manage the battery charging and discharging. The specific process includes:

[0133] Set the charging voltage safety threshold interval (d1, d2) and the discharge current safety threshold interval (c1, c2), where d1 is the upper limit of the charging voltage safety threshold interval, d2 is the lower limit of the charging voltage safety threshold interval, c1 is the upper limit of the discharge current safety threshold interval, and c2 is the lower limit of the discharge current safety threshold interval;

[0134] Obtain the battery charging voltage safety adjustment value u based on the correction coefficient and the correction loss factor s And the battery discharge current safety adjustment value I s ;

[0135] but Among them, p1 is the voltage adjustment factor;

[0136] Then the battery charging voltage safety threshold adjustment range during the evaluation period is (d1+u s , d2-u s );

[0137] but Among them, J1 is the current adjustment factor;

[0138] Then the battery discharge current safety threshold adjustment range during the evaluation period is (c1+I s , c2-I s );

[0139] During the charging process, maintain a constant current and monitor the charging voltage value U in real time. c ;

[0140] Set the upper limit du1 and lower limit du2 of the charging voltage warning threshold. When the charging voltage is greater than or equal to the upper limit du1 or the charging voltage is less than or equal to the lower limit du2, reduce the charging rate and keep the charging voltage in the charging voltage safety threshold adjustment range (d1+u s , d2-u s )Inside;

[0141] During the discharge process, the charging voltage is kept constant and the charging current value I is monitored in real time. c ;

[0142] Set the upper limit of the charging current warning threshold cu1 and the lower limit of the charging current warning threshold cu2. When the charging current value is greater than or equal to the upper limit of the charging current warning threshold cu1 or the charging current value is less than or equal to the lower limit of the charging current warning threshold cu2, reduce the discharge rate and keep the charging current in the charging current safety threshold adjustment range (c1+u s , c2-u s )Inside.

[0143] like Figure 2 As shown, in another embodiment of the present invention, the present invention also discloses a battery charge and discharge management method, comprising the following steps:

[0144] Step S1: Collecting the operating parameters and performance parameters of the battery, periodically collecting the battery charge and discharge data, and obtaining the battery status;

[0145] Step S2: Processing the operating parameters and charge and discharge data to obtain the charge and discharge rate of the battery;

[0146] Step S3: Evaluate the charge and discharge process of the battery according to the charge and discharge rate and charge and discharge duration of the battery, and generate a charge evaluation coefficient and a discharge evaluation coefficient of the battery;

[0147] Step S4: Comprehensively analyzing the number of charge and discharge times of the battery during the evaluation period and the corresponding charge and discharge evaluation coefficients to obtain an analysis result. If the analysis result is abnormal, a battery charge and discharge abnormality signal is generated.

[0148] Step S5: Correcting the battery charge and discharge loss factor according to the battery charge and discharge abnormality signal to generate a correction coefficient;

[0149] Step S6: adjusting the battery charging voltage safety threshold range and the discharge current safety threshold range according to the correction coefficient, and performing charge and discharge management on the battery.

[0150] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A battery charge and discharge management system, including a management center, characterized in that: The management center is communicatively connected to a data acquisition module, a data processing module, a charge and discharge evaluation module, a charge and discharge comprehensive evaluation module, a charge and discharge correction module, and a charge and discharge strategy adjustment module; The data acquisition module includes a data acquisition terminal, a charge and discharge recording unit, and a state of charge acquisition unit. The data acquisition terminal is used to collect operating parameters and performance parameters of the battery. The charge and discharge recording unit is used to periodically collect charge and discharge data of the battery. The state of charge acquisition unit is used to obtain the battery status of the battery. The data processing module is used to process the operating parameters and charge and discharge data to obtain the charge and discharge rate of the battery; The charge and discharge evaluation module includes a charge evaluation unit and a discharge evaluation unit. The charge evaluation unit is used to analyze the battery charging rate and charging time to generate a charge evaluation coefficient of the battery. The discharge evaluation unit is used to analyze the battery discharge rate and discharge time to generate a discharge evaluation coefficient of the battery. The charge and discharge comprehensive evaluation module is used to comprehensively analyze the number of charge and discharge times of the battery in the evaluation cycle and the corresponding charge and discharge evaluation coefficient, compare the theoretical charge and discharge comprehensive evaluation coefficient with the actual charge and discharge comprehensive evaluation coefficient, and obtain the analysis result. If the analysis result is abnormal, a battery charge and discharge abnormality signal is generated; wherein, according to the number of charge times n of the battery in the evaluation cycle, the number of discharge times m corresponding to each charge, and the theoretical charge evaluation coefficient R1 of the i-th charge i and actual charging evaluation coefficient r1 i 、Theoretical discharge evaluation coefficient R2 for j discharges corresponding to i charges ij and actual discharge evaluation coefficient r2 ij , and evaluation factors γ1 and γ2, Obtain theoretical charge and discharge evaluation coefficient Actual charge and discharge evaluation coefficient Theoretical charge and discharge comprehensive evaluation coefficient is obtained from the theoretical charge and discharge evaluation coefficient The actual charge and discharge comprehensive evaluation coefficient is obtained from the actual charge and discharge evaluation coefficient The charge and discharge correction module is used to correct the loss factor of the battery charge and discharge according to the abnormal charge and discharge signal of the battery, and generate a corrected loss factor; wherein, According to the actual battery capacity sr and the initial battery capacity Rl, the first-level correction coefficient f1 of charge and discharge is obtained = ρ1*(Rl-sr); ρ1 is the correction factor; The secondary correction coefficient f2 = ρ2*(Gg) for charge and discharge is obtained based on the theoretical charge and discharge cycle evaluation coefficient and the actual charge and discharge cycle evaluation coefficient; ρ2 is the correction factor; The loss factor is calculated based on the first-level correction coefficient and the second-level correction coefficient. Corrected loss factor The charge and discharge strategy adjustment module is used to obtain the battery charging voltage safety adjustment value u according to the first-level correction coefficient, the second-level correction coefficient and the correction loss factor. s And the battery discharge current safety adjustment value I s , to adjust the battery charging voltage safety threshold range and discharge current safety threshold range, and manage the battery charging and discharging; wherein, p1 is the voltage adjustment factor; J1 is the current adjustment factor.

2. The battery charge and discharge management system according to claim 1, characterized in that: The data acquisition module collects the operating parameters and performance parameters of the battery, periodically collects the battery charge and discharge data, and obtains the battery status. The process includes: The operating parameters include charging voltage value, charging current value and discharging current value; The performance parameters include the initial capacity of the battery and the initial remaining capacity of the battery; The charge and discharge data includes the number of charge and discharge times and the charge and discharge duration; The battery state includes a charging state and a discharging state; Set an evaluation period and obtain the number of battery charges, charging duration, and charging start and end times within the evaluation period; The number of discharges, discharge duration, discharge start time, and discharge end time of a battery that has a charge-discharge association relationship with the battery charging are obtained.

3. The battery charge and discharge management system according to claim 2, characterized in that: The data processing module processes the operating parameters and charge and discharge data to obtain the battery charge and discharge rate. The process includes: Obtain the actual remaining capacity of the battery after charging and discharging within the evaluation period, and generate a corresponding curve of the actual remaining capacity value change; Obtain the theoretical remaining capacity value of the battery according to the initial remaining capacity of the battery and the charge and discharge capacity, and generate a corresponding theoretical remaining capacity value change curve; Construct a two-dimensional coordinate system of time with respect to power value; Mapping the generated actual remaining power value change curve and theoretical remaining power value change curve into a two-dimensional coordinate system; Set a number of sample points in a two-dimensional coordinate system and obtain the slope value of each change curve corresponding to each sample point; The actual charging rate, actual discharging rate, theoretical charging rate and theoretical discharging rate of the battery are obtained according to the obtained slope value.

4. The battery charge and discharge management system according to claim 3, characterized in that: The charging evaluation unit obtains the theoretical charging rate and the actual charging rate within the evaluation period according to the actual remaining power change curve and the theoretical remaining power change curve within the evaluation period; Obtaining a theoretical charging evaluation coefficient and an actual charging evaluation coefficient corresponding to the battery according to the obtained theoretical charging rate and actual charging rate; The discharge evaluation unit obtains the theoretical discharge rate and the actual discharge rate within the evaluation period according to the actual remaining power change curve and the theoretical remaining power change curve within the evaluation period; According to the obtained theoretical discharge rate and actual discharge rate, a theoretical discharge evaluation coefficient and an actual discharge evaluation coefficient corresponding to the battery are obtained.

5. A battery charge and discharge management method, specifically applied to the battery charge and discharge management system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step S1: Collecting the operating parameters and performance parameters of the battery, periodically collecting the battery charge and discharge data, and obtaining the battery status; Step S2: Processing the operating parameters and charge and discharge data to obtain the charge and discharge rate of the battery; Step S3: Evaluate the charge and discharge process of the battery according to the charge and discharge rate and charge and discharge duration of the battery, and generate a charge evaluation coefficient and a discharge evaluation coefficient of the battery; Step S4: Comprehensively analyzing the number of charge and discharge times of the battery during the evaluation period and the corresponding charge and discharge evaluation coefficients to obtain an analysis result. If the analysis result is abnormal, a battery charge and discharge abnormality signal is generated. Step S5: Correcting the battery charge and discharge loss factor according to the battery charge and discharge abnormality signal to generate a corrected loss factor; Step S6: adjusting the battery charging voltage safety threshold range and the discharge current safety threshold range according to the corrected loss factor, and performing charge and discharge management on the battery.

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