Calculation Method, Device, Power Battery and Vehicle for Battery Remaining Power Step Size

Abstract

The present invention provides a method and device for calculating a battery remaining power step, a power battery and an automobile, relating to the technical field of batteries. The method includes: calculating a coefficient correction step of the battery; calculating a deviation correction coefficient of the battery; determining a battery remaining power step according to the coefficient correction step and the deviation correction coefficient; wherein, the battery remaining power step is the product of the coefficient correction step and the deviation correction coefficient. The method for calculating the battery remaining power step in the embodiments of the present invention determines the battery remaining power step by calculating the coefficient correction step of the battery and the deviation correction coefficient of the battery. The solution in the embodiments of the present invention can determine the change step of the current remaining power of the battery according to the current state of the battery, and reasonably reflect the change of the current remaining power of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a method and device for calculating the step size of remaining battery power, a power battery, and an automobile. Background Art

[0002] The remaining battery power is a decisive parameter for measuring the remaining driving range of new energy vehicles. The step size of the remaining battery power of existing batteries is basically a fixed step size (for example, 4% / min). In some cases, this may cause the change of the driving range to be too fast or too slow, resulting in untrue or unreasonable phenomena. The unreasonable or untrue change of the step size of the remaining battery power may directly lead to the user's wrong judgment of the battery power, seriously affecting the user's driving experience of the vehicle. Summary of the Invention

[0003] Embodiments of the present invention provide a method and device for calculating the step size of remaining battery power, a power battery, and an automobile, so as to solve the problem in the prior art that the fixed step size of the remaining battery power of the battery may lead to the user's wrong judgment of the battery power.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] Embodiments of the present invention provide a method for calculating the step size of remaining battery power, including:

[0006] Calculating the coefficient correction step size of the battery;

[0007] Calculating the deviation correction coefficient of the battery;

[0008] Determining the step size of the remaining battery power according to the coefficient correction step size and the deviation correction coefficient;

[0009] Wherein, the step size of the remaining battery power is the product of the coefficient correction step size and the deviation correction coefficient.

[0010] Further, the calculating the coefficient correction step size of the battery includes:

[0011] Determining the basic correction step size of the battery;

[0012] Determining the temperature correction coefficient, the health state coefficient, and the consistency correction coefficient of the battery;

[0013] Calculating the first product of the temperature correction coefficient, the health state coefficient, and the consistency correction coefficient of the battery;

[0014] When the first product is greater than or equal to the first preset value, the coefficient correction step size of the battery is the quotient of the basic correction step size of the battery and the first product;

[0015] When the first product is less than the first preset value, the coefficient correction step size of the battery is the quotient of the basic correction step size of the battery and the first preset value.

[0016] Further, determining the basic correction step size of the battery includes:

[0017] Obtaining the current charge and discharge current of the battery and the basic correction step size table of the battery current;

[0018] Determining the basic correction step size of the battery according to the current charge and discharge current of the battery and the basic correction step size table of the battery current;

[0019] Wherein, the basic correction step size table of the battery current includes the corresponding relationship between the charging current of the battery obtained in advance and the basic correction step size of the battery.

[0020] Further, determining the temperature correction coefficient, health state coefficient and consistency correction coefficient of the battery includes:

[0021] Obtaining the current total non - zero charge ampere - hours of the battery and the highest voltage, lowest voltage and highest temperature of the current battery cell;

[0022] Obtaining the total charge ampere - hour coefficient table of the battery, the temperature correction capacity coefficient table and the battery consistency correction coefficient table;

[0023] Determining the temperature correction capacity coefficient of the battery according to the highest temperature of the current battery cell and the temperature correction capacity coefficient table;

[0024] Determining the health state coefficient of the battery according to the current total non - zero charge ampere - hours of the battery and the total charge ampere - hour coefficient table of the battery;

[0025] Determining the consistency correction coefficient of the battery according to the highest voltage, lowest voltage of the current battery cell and the battery consistency correction coefficient table;

[0026] Wherein, the total charge ampere - hour coefficient table of the battery includes the corresponding relationship between the total charge ampere - hours of the battery obtained in advance and the total charge ampere - hours of the battery;

[0027] The temperature correction capacity coefficient table of the battery includes the corresponding relationship between the temperature of the battery obtained in advance and the temperature correction capacity coefficient of the battery;

[0028] The battery consistency correction coefficient table includes the corresponding relationship between the voltage of the battery obtained in advance and the consistency correction coefficient of the battery.

[0029] Further, calculating the deviation correction coefficient of the battery includes:

[0030] Calculating the true state of charge of the battery;

[0031] Obtaining the charge and discharge current of the battery and the step rated correction coefficient table;

[0032] Determining the step rated correction coefficient of the battery according to the true state of charge of the battery, the charge and discharge current of the battery, and the step rated correction coefficient table of the battery;

[0033] Obtaining the remaining power of the battery and the deviation step correction coefficient table of the battery;

[0034] Determining the deviation step correction coefficient of the battery according to the true state of charge of the battery, the remaining power of the battery, and the deviation step correction coefficient table of the battery;

[0035] The deviation correction coefficient of the battery is the second product of the step rated correction coefficient of the battery and the deviation step correction coefficient of the battery;

[0036] Wherein, the step rated correction coefficient table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the charge and discharge current of the battery, and the step rated correction coefficient of the battery;

[0037] The deviation step correction coefficient table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the remaining power of the battery, and the deviation step correction coefficient of the battery.

[0038] Further, calculating the true state of charge of the battery includes:

[0039] Calculating the true available capacity base value and the ampere-hour integrated capacity of the battery;

[0040] Calculating the third product of the first product and the nominal capacity of the battery;

[0041] The true state of charge of the battery is the quotient of the true available capacity of the battery and the third product;

[0042] The true available capacity of the battery is the sum of the true available capacity base value of the battery and the ampere-hour integrated capacity.

[0043] Further, calculating the true available capacity base value of the battery includes:

[0044] Obtaining the highest voltage of the current battery cell of the battery and the static open-circuit voltage meter of the battery, and determining the available capacity of the battery according to the highest voltage of the current battery cell of the battery and the static open-circuit voltage meter of the battery;

[0045] Calculate a first difference between the available capacity of the battery and the true capacity stored in the battery memory;

[0046] When the absolute value of the first difference is greater than or equal to a preset calibration value, the true available capacity base value of the battery is the available capacity of the battery;

[0047] When the absolute value of the first difference is less than the preset calibration value, the true available capacity base value of the battery is the true capacity stored in the battery memory;

[0048] Wherein, the static open-circuit voltage meter of the battery includes the corresponding relationship between the voltage of the battery obtained in advance and the available capacity of the battery.

[0049] An embodiment of the present invention further provides a calculation device for the battery remaining power step, including:

[0050] A first calculation module for calculating the coefficient correction step of the battery;

[0051] A second calculation module for calculating the deviation correction coefficient of the battery;

[0052] A determination module for determining the battery remaining power step according to the coefficient correction step and the deviation correction coefficient;

[0053] Wherein, the battery remaining power step is the product of the coefficient correction step and the deviation correction coefficient.

[0054] An embodiment of the present invention further provides a power battery, including: a battery controller, a memory, and a program or instruction stored on the memory and executable on the battery controller; when the battery controller executes the program or instruction, the calculation method of the battery remaining power step as described above is implemented.

[0055] An embodiment of the present invention further provides an automobile, including the power battery as described above.

[0056] The beneficial effects of the present invention are:

[0057] The calculation method of the battery remaining power step in the embodiment of the present invention determines the battery remaining power step by calculating the coefficient correction step of the battery and the deviation correction coefficient of the battery. The solution in the embodiment of the present invention can determine the change step of the current remaining power of the battery according to the current state of the battery, and reasonably reflect the change of the current remaining power of the battery. Description of the Drawings

[0058] Figure 1 It represents a step schematic diagram of the calculation method of the battery remaining power step in the embodiment of the present invention;

[0059] Figure 2 Schematic structural diagram of a calculation device for the remaining power step of a battery according to an embodiment of the present invention. Detailed implementation manners

[0060] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0061] In view of the problem that the remaining power step of a battery in the prior art is basically a fixed step, which may lead to an incorrect judgment of the battery power by a user, the present invention provides a method, a device, a power battery and an automobile for calculating the remaining power step of a battery.

[0062] As Figure 1 shown, an embodiment of the present invention provides a method for calculating the remaining power step of a battery, including:

[0063] Step 101, calculating a coefficient correction step of the battery;

[0064] Step 102, calculating a deviation correction coefficient of the battery;

[0065] Step 103, determining the remaining power step of the battery according to the coefficient correction step and the deviation correction coefficient;

[0066] Wherein, the remaining power step of the battery is the product of the coefficient correction step and the deviation correction coefficient.

[0067] The method for calculating the remaining power step of a battery according to an embodiment of the present invention determines the remaining power step of the battery by calculating the coefficient correction step of the battery and the deviation correction coefficient of the battery. The solution of the embodiment of the present invention can determine the change step of the current remaining power of the battery according to the current state of the battery, and reasonably reflect the change of the current remaining power of the battery.

[0068] The change of the remaining power is mainly affected by the charge and discharge current, the battery temperature, the total charge ampere-hour that is not cleared cumulatively, the highest voltage and the lowest voltage of a single cell. The relationship between these parameters and the remaining power can be obtained through analysis of multiple groups of experimental data, and the basic step of the change of the remaining power step, that is, the coefficient correction step, can be obtained. Furthermore, the change step of the current state of charge (SOC), that is, the deviation correction coefficient, is corrected in real time through the deviation relationship between the current displayed SOC and the true SOC. In this way, the remaining power in each sampling period is the remaining power in the previous sampling period + the change step of the remaining power in the current sampling period, and the change step of the remaining power = coefficient correction step * deviation correction coefficient. It should be noted that the change step of the remaining power in the current sampling period can be positive or negative, and the positive and negative of the change step of the remaining power in the current sampling period are positively correlated with the positive and negative of the current.

[0069] Optionally, calculating the coefficient correction step of the battery includes:

[0070] Determining the basic correction step of the battery;

[0071] Determining the temperature correction coefficient, state of health coefficient, and consistency correction coefficient of the battery;

[0072] Calculating the first product of the temperature correction coefficient, state of health coefficient, and consistency correction coefficient of the battery;

[0073] When the first product is greater than or equal to the first preset value, the coefficient correction step of the battery is the quotient of the basic correction step of the battery and the first product;

[0074] When the first product is less than the first preset value, the coefficient correction step of the battery is the quotient of the basic correction step of the battery and the first preset value.

[0075] Among them, coefficient correction step = basic correction step / [0.001, (temperature correction capacity coefficient * battery state of health SOH coefficient * battery consistency correction coefficient)] max .

[0076] The method for calculating the remaining battery power step in the embodiment of the present invention determines the remaining battery power step by calculating the coefficient correction step of the battery and the deviation correction coefficient of the battery. The solution in the embodiment of the present invention can determine the change step of the current remaining battery power according to the current state of the battery, and reasonably reflect the change of the current remaining battery power.

[0077] Optionally, determining the basic correction step of the battery includes:

[0078] Obtaining the current charge and discharge current of the battery and the current basic correction step table of the battery;

[0079] Determining the basic correction step of the battery according to the current charge and discharge current of the battery and the current basic correction step table of the battery;

[0080] Among them, the current basic correction step table of the battery includes the corresponding relationship between the charging current of the battery obtained in advance and the basic correction step of the battery.

[0081] Optionally, the current basic correction step of the battery is determined by looking up the current basic correction step table of the battery determined in advance through experimental data coupling and experimental calibration. The current basic correction step table of the battery is shown in Table 1:

[0082] Table 1 Current - Basic Correction Step Table

[0083] Current (A) -400 -200 -100 0 200 400 600 Basic correction step size XX XXX XX XX XX XX XX

[0084] It should be noted that the current charge and discharge current of the battery is the actual current collected by the battery controller sensor.

[0085] In the method for calculating the remaining battery power step in the embodiment of the present invention, based on the correspondence relationship between the charging current of the battery obtained in advance and the basic correction step of the battery, the basic correction step of the battery is determined according to the current charge and discharge current of the battery. In the embodiment of this solution, the real-time basic correction step of the battery is determined through the current basic correction step table of the battery determined by pre-experiment data coupling and experiment calibration, providing data support for accurately calculating the remaining battery power step.

[0086] Optionally, determining the temperature correction coefficient, health state coefficient, and consistency correction coefficient of the battery includes:

[0087] Obtaining the total accumulated charge ampere-hours of the battery that is not cleared currently and the highest voltage, lowest voltage, and highest temperature of the current battery cell monomer;

[0088] Obtaining the total accumulated charge ampere-hour coefficient table of the battery, temperature correction capacity coefficient table, and battery consistency correction coefficient table;

[0089] Determining the temperature correction capacity coefficient of the battery according to the highest temperature of the current battery cell monomer and the temperature correction capacity coefficient table;

[0090] Determining the health state coefficient of the battery according to the total accumulated charge ampere-hours of the battery that is not cleared currently and the total accumulated charge ampere-hour coefficient table of the battery;

[0091] Determining the consistency correction coefficient of the battery according to the highest voltage, lowest voltage of the current battery cell monomer, and the battery consistency correction coefficient table;

[0092] Wherein, the total accumulated charge ampere-hour coefficient table of the battery includes the correspondence relationship between the total accumulated charge ampere-hours of the battery obtained in advance and the total accumulated charge ampere-hours of the battery;

[0093] The temperature correction capacity coefficient table of the battery includes the correspondence relationship between the temperature of the battery obtained in advance and the temperature correction capacity coefficient of the battery;

[0094] The battery consistency correction coefficient table includes the correspondence relationship between the voltage of the battery obtained in advance and the consistency correction coefficient of the battery.

[0095] Optionally, the temperature correction capacity coefficient of the battery is determined by looking up the temperature correction capacity coefficient table of the battery determined by pre-experiment data coupling and experiment calibration. The temperature correction capacity coefficient table of the battery is shown in Table 2:

[0096] Table 2 Temperature Correction Coefficient Table

[0097]

[0098] It should be noted that the highest temperature of the current single battery cell of the battery is the highest temperature of the single battery cell uploaded by the sub-board of the battery controller.

[0099] Optionally, the health state coefficient of the battery is determined by the total accumulated charge ampere-hour coefficient table of the battery determined by pre-coupling experimental data and experimental calibration. The total accumulated charge ampere-hour of the battery is obtained by looking up the total accumulated charge ampere-hour coefficient table of the battery, and the health state coefficient of the battery is calculated. The total accumulated charge ampere-hour coefficient table of the battery is shown in Table 3:

[0100] Table 3 Total Accumulated Charge Ampere-hour Table

[0101] Total ampere-hours of cumulative non-zero-cleared charging (Ah) 0 200 400 600 Temperature correction capacity coefficient XX XX XX XX

[0102] It should be noted that the current total accumulated charge ampere-hour of the battery that is not cleared is calculated by the battery controller.

[0103] Optionally, the consistency correction coefficient of the battery is determined by looking up the battery consistency correction coefficient table determined by pre-coupling experimental data and experimental calibration. The battery consistency correction coefficient table is shown in Table 4:

[0104] Table 4 Battery Consistency Coefficient Table

[0105]

[0106] It should be noted that the highest voltage and the lowest voltage of the current single battery cell of the battery are the highest voltage and the lowest voltage of the single battery cell uploaded by the sub-board of the battery controller.

[0107] The calculation method of the battery remaining power step in the embodiment of the present invention calculates the temperature correction capacity coefficient, the health state coefficient and the consistency correction coefficient of the battery through the total accumulated charge ampere-hour coefficient table, the temperature correction capacity coefficient table and the battery consistency correction coefficient table of the battery determined by pre-coupling experimental data and experimental calibration, providing data support for accurately calculating the coefficient correction step of the battery.

[0108] Optionally, calculating the deviation correction coefficient of the battery includes:

[0109] Calculating the true state of charge of the battery;

[0110] Obtaining the charge and discharge current of the battery and the step rated correction coefficient table;

[0111] Determine the step-rated correction factor of the battery according to the true state of charge of the battery, the charge and discharge current of the battery, and the step-rated correction factor table of the battery;

[0112] Obtain the remaining power of the battery and the deviation step correction factor table of the battery;

[0113] Determine the deviation step correction factor of the battery according to the true state of charge of the battery, the remaining power of the battery, and the deviation step correction factor table of the battery;

[0114] The deviation correction factor of the battery is the second product of the step-rated correction factor of the battery and the deviation step correction factor of the battery;

[0115] Wherein, the step-rated correction factor table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the charge and discharge current of the battery, and the step-rated correction factor of the battery;

[0116] The deviation step correction factor table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the remaining power of the battery, and the deviation step correction factor of the battery.

[0117] Optionally, determining the deviation step correction factor of the battery according to the true state of charge of the battery, the remaining power of the battery, and the deviation step correction factor table of the battery includes:

[0118] Calculate the first difference between the true state of charge of the battery and the remaining power of the battery;

[0119] Look up the deviation step correction factor table of the battery according to the first difference and the true state of charge of the battery to determine the deviation step correction factor of the battery.

[0120] Optionally, the step-rated correction factor of the battery is determined by looking up the step-rated correction factor table of the battery determined in advance through experimental data coupling and experimental calibration. The step-rated correction factor table of the battery is shown in Table 5:

[0121] Table 5 Step-rated correction factor table

[0122]

[0123] Optionally, the deviation step correction factor of the battery is determined by looking up the deviation step correction factor table of the battery determined in advance through experimental data coupling and experimental calibration. The deviation step correction factor table of the battery is shown in Table 6:

[0124] Table 6 Deviation step correction factor table

[0125]

[0126] The calculation method of the battery remaining power step in the embodiment of the present invention calculates the deviation correction coefficient of the battery through the step rated correction coefficient table of the battery and the deviation step correction coefficient table of the battery determined in advance by experimental data coupling and experimental calibration, providing data support for accurately calculating the deviation correction coefficient of the battery.

[0127] Optionally, calculating the true state of charge of the battery includes:

[0128] Calculating the true available capacity base value and the ampere-hour integrated capacity of the battery;

[0129] Calculating the third product of the first product and the nominal capacity of the battery;

[0130] The true state of charge of the battery is the quotient of the true available capacity of the battery and the third product;

[0131] The true available capacity of the battery is the sum of the true available capacity base value of the battery and the ampere-hour integrated capacity.

[0132] Optionally, the ampere-hour integrated capacity is calculated by the controller according to the ampere-hour integration of the battery charge and discharge current after the controller is powered on.

[0133] Optionally, calculating the true available capacity base value of the battery includes:

[0134] Obtaining the highest voltage of the current battery cell of the battery and the static open-circuit voltage table of the battery, and determining the available capacity of the battery according to the highest voltage of the current battery cell of the battery and the static open-circuit voltage table of the battery;

[0135] Calculating the first difference between the available capacity of the battery and the true capacity stored in the battery memory;

[0136] When the absolute value of the first difference is greater than or equal to a preset calibration value, the true available capacity base value of the battery is the available capacity of the battery;

[0137] When the absolute value of the first difference is less than the preset calibration value, the true available capacity base value of the battery is the true capacity stored in the battery memory;

[0138] Wherein, the static open-circuit voltage table of the battery includes the corresponding relationship between the voltage of the battery obtained in advance and the available capacity of the battery.

[0139] It should be noted that the nominal capacity is an inherent parameter of the battery, and different batteries have different nominal capacities.

[0140] Optionally, the available capacity of the battery is determined by looking up the static open-circuit voltage table of the battery determined in advance through experimental data coupling and experimental calibration. The static open-circuit voltage table of the battery is shown in Table 7:

[0141] Table 7 Static Open-Circuit Voltage Table

[0142] Highest voltage of single cell (V) 3.2 3.5 3.8 4 4.1 4.2 4.25 OCV capacity (Ah) XX XX XX XX X X X X X X

[0143] It should be noted that the highest voltage of the current single cell of the battery is the highest voltage of the single cell uploaded by the battery controller daughter board.

[0144] Optionally, when the battery triggers a serious fault and the remaining power target value is 0, the remaining power step of the battery directly jumps to 0.

[0145] The method for calculating the remaining power step of the battery in the embodiment of the present invention calculates the basic value of the true available capacity of the battery by looking up the static open-circuit voltage table of the battery determined in advance through experimental data coupling and experimental calibration, providing data support for accurately calculating the coefficient correction step of the battery.

[0146] As Figure 2 shown, the embodiment of the present invention also provides a calculation device 200 for the remaining power step of the battery, including:

[0147] A first calculation module 201 for calculating the coefficient correction step of the battery;

[0148] A second calculation module 202 for calculating the deviation correction coefficient of the battery;

[0149] A determination module 203 for determining the remaining power step of the battery according to the coefficient correction step and the deviation correction coefficient;

[0150] Wherein, the remaining power step of the battery is the product of the coefficient correction step and the deviation correction coefficient.

[0151] The calculation device for the remaining power step of the battery in the embodiment of the present invention determines the remaining power step of the battery by calculating the coefficient correction step of the battery and the deviation correction coefficient of the battery. The solution of the embodiment of the present invention can determine the change step of the current remaining power of the battery according to the current state of the battery, and reasonably reflect the change of the current remaining power of the battery.

[0152] The embodiment of the present invention also provides a power battery, including: a battery controller, a memory, and a program or instruction stored on the memory and executable on the battery controller; when the battery controller executes the program or instruction, the method for calculating the remaining power step of the battery as described above is implemented.

[0153] An embodiment of the present invention further provides an automobile, including the power battery as described above.

[0154] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principle described in the present invention, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. A method for calculating the step of the remaining battery power, characterized in that, Including: Calculating the coefficient correction step of the battery; Calculating the deviation correction coefficient of the battery; Determining the remaining battery power step according to the coefficient correction step and the deviation correction coefficient; Wherein, the remaining battery power step is the product of the coefficient correction step and the deviation correction coefficient; The calculating the coefficient correction step of the battery includes: Determining the basic correction step of the battery; Determining the temperature correction coefficient, state of health coefficient and consistency correction coefficient of the battery; Calculating the first product of the temperature correction coefficient, state of health coefficient and consistency correction coefficient of the battery; When the first product is greater than or equal to the first preset value, the coefficient correction step of the battery is the quotient of the basic correction step of the battery and the first product; When the first product is less than the first preset value, the coefficient correction step of the battery is the quotient of the basic correction step of the battery and the first preset value; The determining the basic correction step of the battery includes: Obtaining the current charge and discharge current of the battery and the battery current basic correction step table; Determining the basic correction step of the battery according to the current charge and discharge current of the battery and the battery current basic correction step table; Wherein, the battery current basic correction step table includes the corresponding relationship between the charging current of the battery obtained in advance and the basic correction step of the battery; The calculating the deviation correction coefficient of the battery includes: Calculating the true state of charge of the battery; Obtaining the charge and discharge current of the battery and the step rated correction coefficient table; Determining the step rated correction coefficient of the battery according to the true state of charge of the battery, the charge and discharge current of the battery and the step rated correction coefficient table of the battery; Obtaining the remaining battery power and the deviation step correction coefficient table of the battery; Determining the deviation step correction coefficient of the battery according to the true state of charge of the battery, the remaining battery power and the deviation step correction coefficient table of the battery; The deviation correction coefficient of the battery is the second product of the step rated correction coefficient of the battery and the deviation step correction coefficient of the battery; Wherein, the step rated correction coefficient table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the charge and discharge current of the battery and the step rated correction coefficient of the battery; The deviation step correction coefficient table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the remaining battery power and the deviation step correction coefficient of the battery.

2. The calculation method of the battery remaining power step length according to claim 1, wherein The determining the temperature correction coefficient, state of health coefficient and consistency correction coefficient of the battery includes: Obtaining the current total charging ampere-hours that is not cleared and the highest voltage, lowest voltage and highest temperature of the current battery cell of the battery; Obtaining the total charging ampere-hour coefficient table, temperature correction capacity coefficient table and battery consistency correction coefficient table of the battery; Determining the temperature correction capacity coefficient of the battery according to the highest temperature of the current battery cell of the battery and the temperature correction capacity coefficient table; Determine the health state coefficient of the battery according to the current cumulative non - zero total ampere - hours of charge of the battery and the cumulative charge total ampere - hour coefficient table of the battery; Determine the consistency correction coefficient of the battery according to the highest voltage, the lowest voltage of the current battery cell monomers, and the battery consistency correction coefficient table; Among them, the cumulative charge total ampere - hour coefficient table of the battery includes the corresponding relationship between the previously obtained cumulative charge total ampere - hours of the battery and the cumulative charge total ampere - hours of the battery; The temperature - corrected capacity coefficient table of the battery includes the corresponding relationship between the previously obtained temperature of the battery and the temperature - corrected capacity coefficient of the battery; The battery consistency correction coefficient table includes the corresponding relationship between the previously obtained voltage of the battery and the consistency correction coefficient of the battery.

3. The calculation method of the battery remaining power step length according to claim 2, wherein The calculation of the true state of charge of the battery includes: Calculate the true available capacity base value and the ampere - hour integrated capacity of the battery; Calculate the third product of the first product and the nominal capacity of the battery; The true state of charge of the battery is the quotient of the true available capacity of the battery and the third product; Among them, the true available capacity of the battery is the sum of the true available capacity base value of the battery and the ampere - hour integrated capacity.

4. The calculation method of the battery remaining power step length according to claim 3, characterized in that The calculation of the true available capacity base value of the battery includes: Obtain the highest voltage of the current battery cell monomers of the battery and the static open - circuit voltage table of the battery, and determine the available capacity of the battery according to the highest voltage of the current battery cell monomers of the battery and the static open - circuit voltage table of the battery; Calculate the first difference between the available capacity of the battery and the true capacity stored in the battery memory; When the absolute value of the first difference is greater than or equal to the preset calibration value, the true available capacity base value of the battery is the available capacity of the battery; When the absolute value of the first difference is less than the preset calibration value, the true available capacity base value of the battery is the true capacity stored in the battery memory; Among them, the static open - circuit voltage table of the battery includes the corresponding relationship between the previously obtained voltage of the battery and the available capacity of the battery.

5. A calculation device for the step of remaining battery power, characterized in that, Include: A first calculation module for calculating the coefficient correction step of the battery; A second calculation module for calculating the deviation correction coefficient of the battery; A determination module for determining the remaining battery charge step according to the coefficient correction step and the deviation correction coefficient; Among them, the remaining battery charge step is the product of the coefficient correction step and the deviation correction coefficient; The first calculation module is also used to determine the basic correction step of the battery; Determine the temperature correction coefficient, the health state coefficient, and the consistency correction coefficient of the battery; Calculate the first product of the temperature correction coefficient, the health state coefficient, and the consistency correction coefficient of the battery; When the first product is greater than or equal to the first preset value, the coefficient correction step of the battery is the quotient of the basic correction step of the battery and the first product; When the first product is less than the first preset value, the coefficient correction step of the battery is the quotient of the basic correction step of the battery and the first preset value; Obtain the current charge and discharge current of the battery and the current basic correction step table of the battery; Determine the basic correction step of the battery according to the current charge and discharge current of the battery and the current basic correction step table of the battery; Wherein, the current basic correction step table of the battery includes the corresponding relationship between the charging current of the battery obtained in advance and the basic correction step of the battery; The second calculation module is further configured to calculate the true state of charge of the battery; Obtain the charge and discharge current of the battery and the step rated correction coefficient table; Determine the step rated correction coefficient of the battery according to the true state of charge of the battery, the charge and discharge current of the battery, and the step rated correction coefficient table of the battery; Obtain the remaining power of the battery and the deviation step correction coefficient table of the battery; Determine the deviation step correction coefficient of the battery according to the true state of charge of the battery, the remaining power of the battery, and the deviation step correction coefficient table of the battery; The deviation correction coefficient of the battery is the second product of the step rated correction coefficient of the battery and the deviation step correction coefficient of the battery; Wherein, the step rated correction coefficient table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the charge and discharge current of the battery, and the step rated correction coefficient of the battery; The deviation step correction coefficient table of the battery includes the corresponding relationship between the true state of charge of the battery obtained in advance, the remaining power of the battery, and the deviation step correction coefficient of the battery.

6. A power battery, comprising: A battery controller, a memory, and a program or instruction stored on the memory and executable on the battery controller; characterized in that when the battery controller executes the program or instruction, the calculation method of the battery remaining power step described in any one of claims 1-4 is implemented.

7. A vehicle, characterized in that, Including the power battery according to claim 6.

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