Methods, devices and equipment for estimating the driving range of power batteries

Abstract

This invention discloses a method, apparatus, and device for estimating the driving range of a power battery. The method includes: acquiring the current temperature of the environment in which the power battery is located; determining the current cell capacity, current output power, and current open-circuit voltage of the power battery based on the current temperature; determining a first temperature influence coefficient based on the current cell capacity; determining a second temperature influence coefficient based on the current output power and current open-circuit voltage; and processing the driving range of a reference battery based on the first and second temperature influence coefficients to obtain the current driving range of the power battery at the current temperature, wherein the reference battery driving range is the driving range of the power battery obtained through pre-testing at a preset temperature. This invention solves the technical problem of low accuracy in estimating the driving range of power batteries.

Description

Technical Field

[0001] This invention belongs to the field of vehicle technology, and in particular relates to a method, apparatus and equipment for estimating the driving range of a power battery. Background Technology

[0002] With the continuous development of new energy technologies, pure electric vehicles, as the mainstay of new energy vehicles, have become a significant force driving the growth of the national vehicle ownership. Currently, methods for estimating the driving range of power batteries mostly rely on statistical and big data approaches. However, during project development, due to insufficient data accumulation, these methods cannot accurately estimate the driving range of power batteries. Inaccurate estimation of the driving range may lead to frequent charging by drivers or vehicle breakdowns due to low battery levels, reducing driver satisfaction. Therefore, the low accuracy of power battery driving range estimation is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] This invention provides a method, apparatus, and device for estimating the driving range of a power battery, solving the technical problem of low accuracy in estimating the driving range of a power battery.

[0004] In a first aspect, embodiments of the present invention provide a method for estimating the driving range of a power battery, comprising: obtaining the current temperature of the environment in which the power battery is located; determining the current cell capacity, current output power, and current open-circuit voltage of the power battery based on the current temperature; determining a first temperature influence coefficient based on the current cell capacity; determining a second temperature influence coefficient based on the current output power and the current open-circuit voltage; and processing a reference battery driving range based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery driving range of the power battery at the current temperature, wherein the reference battery driving range is the battery driving range of the power battery at a preset temperature obtained through pre-testing.

[0005] In conjunction with the first aspect of the present invention, in some embodiments, determining the first temperature influence coefficient based on the current cell capacity includes: obtaining the cell capacity decay parameter of the power battery; processing the reference cell capacity based on the current cell capacity and the cell capacity decay parameter to obtain the first temperature influence coefficient, wherein the reference cell capacity is the cell capacity of the power battery at the preset temperature obtained by pre-testing.

[0006] In conjunction with the first aspect of the present invention, in some embodiments, the step of processing the reference cell capacity based on the current cell capacity and the cell capacity decay parameter to obtain the first temperature influence coefficient includes: processing the reference cell capacity based on the current cell capacity and the cell capacity decay parameter to obtain an influence sub-coefficient; and correcting the influence sub-coefficient based on a preset correction coefficient to obtain the first temperature influence coefficient.

[0007] In conjunction with the first aspect of the present invention, in some embodiments, determining the second temperature influence coefficient based on the current output power and the current open-circuit voltage includes: obtaining the cell capacity decay parameter of the power battery; processing the reference output power based on the current output power and the cell capacity decay parameter to obtain a first intermediate parameter, wherein the reference output power is the output power of the power battery at a preset temperature obtained through pre-testing; processing the reference open-circuit voltage based on the current open-circuit voltage and the cell capacity decay parameter to obtain a second intermediate parameter, wherein the reference open-circuit voltage is the open-circuit voltage of the power battery at the preset temperature obtained through pre-testing; and determining the second temperature influence coefficient based on the first intermediate parameter and the second intermediate parameter.

[0008] In conjunction with the first aspect of the present invention, in some embodiments, determining the second temperature influence coefficient based on the first intermediate parameter and the second intermediate parameter includes: processing the first intermediate parameter based on a preset first correction coefficient to obtain a third intermediate parameter; processing the second intermediate parameter based on a preset second correction coefficient to obtain a fourth intermediate parameter; and obtaining the second temperature influence coefficient based on the third intermediate parameter, the fourth intermediate parameter, and the preset third correction coefficient.

[0009] In conjunction with the first aspect of the present invention, in some embodiments, processing the reference battery range based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery range of the power battery at the current temperature includes: determining a correction coefficient based on the first temperature influence coefficient and the second temperature influence coefficient; and obtaining the current battery range based on the product of the correction coefficient and the reference battery range.

[0010] In conjunction with the first aspect of the present invention, in some embodiments, determining the correction coefficient based on the first temperature influence coefficient and the second temperature influence coefficient includes: setting a third temperature influence coefficient within the value range corresponding to the current temperature; and using the sum of the first temperature influence coefficient, the second temperature influence coefficient, and the third temperature influence coefficient as the correction coefficient.

[0011] In conjunction with the first aspect of the present invention, in some embodiments, setting a third temperature influence coefficient within the range corresponding to the current temperature includes: if the current temperature is not greater than 0°C, the value range of the third temperature influence coefficient is -0.2 to -0.1; if the current temperature is not greater than 15°C and greater than 0°C, the value range of the third temperature influence coefficient is -0.1 to -0.02; if the current temperature is not greater than 35°C and greater than 15°C, the value range of the third temperature influence coefficient is 0.02 to 0.1; if the current temperature is not greater than 55°C and greater than 35°C, the value range of the third temperature influence coefficient is -0.1 to -0.02.

[0012] Secondly, embodiments of the present invention provide a power battery range estimation device, comprising: a temperature acquisition unit for acquiring the current temperature of the environment where the power battery is located; a parameter determination unit for determining the current cell capacity, current output power, and current open-circuit voltage of the power battery based on the current temperature; a first coefficient determination unit for determining a first temperature influence coefficient based on the current cell capacity; a second coefficient determination unit for determining a second temperature influence coefficient based on the current output power and the current open-circuit voltage; and a processing unit for processing a reference battery range based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery range of the power battery at the current temperature, wherein the reference battery range is the battery range of the power battery at a preset temperature obtained through pre-testing.

[0013] Thirdly, embodiments of the present invention provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in any of the first aspects.

[0014] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0015] This invention obtains the current temperature of the environment where the power battery is located; based on the current temperature, it determines the current cell capacity, current output power, and current open-circuit voltage of the power battery; based on the current cell capacity, it determines a first temperature influence coefficient; based on the current output power and current open-circuit voltage, it determines a second temperature influence coefficient; and based on the first and second temperature influence coefficients, it processes the reference battery range to obtain the current battery range at the current temperature. The reference battery range is the battery range of the power battery obtained through pre-testing at a preset temperature. Since different cell performances of the power battery lead to differences in range, and different temperatures affect the cell performance, the cell performance of the power battery, namely the current cell capacity, current output power, and current open-circuit voltage, is determined based on temperature. Then, the current battery range is determined using the current cell capacity, current output power, and current open-circuit voltage, thus achieving the estimation of the power battery range based on cell performance at different temperatures. Therefore, the accuracy of power battery range estimation is improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the method for estimating the driving range of a power battery in an embodiment of the present invention;

[0018] Figure 2 This is a functional block diagram of the power battery range estimation device in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0022] This invention provides a method for estimating the driving range of a power battery, with reference to... Figure 1 As shown, the method includes the following steps S101 to S105:

[0023] S101: Obtain the current temperature of the environment where the power battery is located.

[0024] S102: Based on the current temperature, determine the current cell capacity, current output power, and current open-circuit voltage of the power battery.

[0025] In some implementations, determining the current cell capacity, current output power, and current open-circuit voltage of the power battery based on the current temperature may include: acquiring cell capacity data, output power data, and open-circuit voltage data; determining the current cell capacity from the cell capacity data based on the current temperature; determining the current output power from the output power data based on the current temperature; and determining the current open-circuit voltage from the open-circuit voltage data based on the current temperature.

[0026] S103: Determine the first temperature influence coefficient based on the current cell capacity.

[0027] In some implementations, step S103 may include the following steps S1031 to S1032:

[0028] S1031: Obtain the cell capacity decay parameters of the power battery.

[0029] In some implementations, obtaining the cell capacity degradation parameter of the power battery may include: obtaining the battery health of the power battery; determining the cell capacity degradation rate of the power battery based on the battery health; and using the cell capacity degradation rate as the cell capacity degradation parameter.

[0030] S1032: The reference cell capacity is processed based on the current cell capacity and cell capacity decay parameters to obtain the first temperature influence coefficient. The reference cell capacity is the cell capacity of the power battery obtained by pre-testing at a preset temperature.

[0031] It should be noted that the preset temperature can be a temperature value less than 60℃, such as 10℃, 20℃, 25℃ or 30℃.

[0032] In some implementations, the reference cell capacity is processed based on the current cell capacity and cell capacity decay parameters to obtain a first temperature influence coefficient. This may include: processing the reference cell capacity based on the current cell capacity and cell capacity decay parameters to obtain an influence sub-coefficient; and correcting the influence sub-coefficient based on a preset correction coefficient to obtain the first temperature influence coefficient.

[0033] Specifically, the reference cell capacity is processed based on the current cell capacity and cell capacity decay parameters to obtain an influence sub-coefficient. This can be achieved by: using the quotient of the current cell capacity and the reference cell capacity as a first value; and using the product of the first value and the cell capacity decay parameters as the influence sub-coefficient. Furthermore, the influence sub-coefficient is corrected based on a preset correction coefficient to obtain a first temperature influence coefficient. This can be achieved by: using the product of the correction coefficient and the influence sub-coefficient as the first temperature influence coefficient.

[0034] Specifically, you can refer to the following formula (1):

[0035]

[0036] Where A1 is the first temperature influence coefficient, I1 is the correction coefficient, and C T For the current cell capacity, C T0 η represents the baseline cell capacity, and η is the cell capacity decay parameter.

[0037] It should be noted that by correcting the influencing factors with a correction factor, the first temperature influence factor is obtained, which improves the accuracy of the first temperature influence factor and ensures the reliability of the subsequent determination of the current battery range.

[0038] In some implementations, the reference cell capacity is processed based on the current cell capacity and cell capacity decay parameters to obtain a first temperature influence coefficient. This may further include: processing the reference cell capacity based on the current cell capacity and cell capacity decay parameters to obtain an influence sub-coefficient; and using the influence sub-coefficient as the first temperature influence coefficient.

[0039] S104: Determine the second temperature influence coefficient based on the current output power and the current open-circuit voltage.

[0040] In some embodiments, step S104 includes the following steps S1041 to S1044:

[0041] S1041: Obtain the cell capacity degradation parameters of the power battery.

[0042] S1042: The reference output power is processed based on the current output power and cell capacity decay parameters to obtain the first intermediate parameter. The reference output power is the output power of the power battery at a preset temperature obtained from a pre-test.

[0043] Specifically, step S1042 can be referred to as formula (2) below:

[0044]

[0045] Where Z1 is the first intermediate parameter, P T P is the current output power. T0 η is the reference output power, η is the cell capacity decay parameter, and soc is the charge of the power battery.

[0046] S1043: The reference open-circuit voltage is processed based on the current open-circuit voltage and cell capacity decay parameters to obtain the second intermediate parameter. The reference open-circuit voltage is the open-circuit voltage of the power battery at a preset temperature obtained through pre-testing.

[0047] Specifically, step S1043 can be referred to the following formula (3):

[0048]

[0049] Where Z2 is the second intermediate parameter, U T Current open-circuit voltage, U T0 η is the reference open-circuit voltage, η is the cell capacity decay parameter, and soc is the charge of the power battery.

[0050] S1044: Determine the second temperature influence coefficient based on the first and second intermediate parameters.

[0051] In some implementations, determining the second temperature influence coefficient based on the first intermediate parameter and the second intermediate parameter may include: processing the first intermediate parameter based on a preset first correction coefficient to obtain a third intermediate parameter; processing the second intermediate parameter based on a preset second correction coefficient to obtain a fourth intermediate parameter; and obtaining the second temperature influence coefficient based on the third intermediate parameter, the fourth intermediate parameter, and the preset third correction coefficient.

[0052] Specifically, processing the first intermediate parameter based on a preset first correction coefficient to obtain the third intermediate parameter can be achieved by multiplying the first correction coefficient by the first intermediate parameter and using that product as the third intermediate parameter. Processing the second intermediate parameter based on a preset second correction coefficient to obtain the fourth intermediate parameter can be achieved by multiplying the second correction coefficient by the second intermediate parameter and using that product as the fourth intermediate parameter. Based on the third intermediate parameter, the fourth intermediate parameter, and the preset third correction coefficient, the second temperature influence coefficient is obtained. This can be achieved by summing the third intermediate parameter, the fourth intermediate parameter, and the third correction coefficient as the second temperature influence coefficient.

[0053] It should be noted that by correcting the intermediate parameters with a correction coefficient, the accuracy of the second temperature influence coefficient is improved, ensuring the reliability of subsequently determining the current battery range.

[0054] S105: The reference battery range is processed based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery range of the power battery at the current temperature. The reference battery range is the battery range of the power battery at the preset temperature obtained by pre-testing.

[0055] In some implementations, S105 may include the following steps S1051 to S1052:

[0056] S1051: Determine the correction coefficient based on the first temperature influence coefficient and the second temperature influence coefficient.

[0057] In some implementations, determining a correction coefficient based on a first temperature influence coefficient and a second temperature influence coefficient may include: setting a third temperature influence coefficient within the range of values ​​corresponding to the current temperature; and using the sum of the first temperature influence coefficient, the second temperature influence coefficient, and the third temperature influence coefficient as the correction coefficient.

[0058] Within the range of values ​​corresponding to the current temperature, a third temperature influence coefficient is set, which may include: if the current temperature is not greater than 0℃, the value range of the third temperature influence coefficient is -0.2 to -0.1; if the current temperature is not greater than 15℃ and is greater than 0℃, the value range of the third temperature influence coefficient is -0.1 to -0.02; if the current temperature is not greater than 35℃ and is greater than 15℃, the value range of the third temperature influence coefficient is 0.02 to 0.1; if the current temperature is not greater than 55℃ and is greater than 35℃, the value range of the third temperature influence coefficient is -0.1 to -0.02.

[0059] In some implementations, determining a correction coefficient based on a first temperature influence coefficient and a second temperature influence coefficient may include using the sum of the first temperature influence coefficient and the second temperature influence coefficient as the correction coefficient.

[0060] S1052: The current battery range is obtained based on the product of the correction factor and the baseline battery range.

[0061] This invention obtains the current temperature of the environment where the power battery is located; based on the current temperature, it determines the current cell capacity, current output power, and current open-circuit voltage of the power battery; based on the current cell capacity, it determines a first temperature influence coefficient; based on the current output power and current open-circuit voltage, it determines a second temperature influence coefficient; and based on the first and second temperature influence coefficients, it processes the reference battery range to obtain the current battery range at the current temperature. The reference battery range is the battery range of the power battery obtained through pre-testing at a preset temperature. Since different cell performances of the power battery lead to differences in range, and different temperatures affect the cell performance, the cell performance of the power battery, namely the current cell capacity, current output power, and current open-circuit voltage, is determined based on temperature. Then, the current battery range is determined using the current cell capacity, current output power, and current open-circuit voltage, thus achieving the estimation of the power battery range based on cell performance at different temperatures. Therefore, the accuracy of power battery range estimation is improved.

[0062] Based on the same inventive concept, and referring to Figure 2 As shown in the figure, an embodiment of the present invention provides a power battery range estimation device 10, including: a temperature acquisition unit 110, used to acquire the current temperature of the environment where the power battery is located; a parameter determination unit 120, used to determine the current cell capacity, current output power and current open circuit voltage of the power battery based on the current temperature; a first coefficient determination unit 130, used to determine a first temperature influence coefficient based on the current cell capacity; a second coefficient determination unit 140, used to determine a second temperature influence coefficient based on the current output power and current open circuit voltage; and a processing unit 150, used to process the reference battery range based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery range of the power battery at the current temperature, wherein the reference battery range is the battery range of the power battery at a preset temperature obtained through pre-testing.

[0063] It is understood that the first coefficient determination unit 130 includes: a decay parameter acquisition subunit, used to acquire the cell capacity decay parameter of the power battery; and a first processing subunit, used to process the reference cell capacity based on the current cell capacity and the cell capacity decay parameter to obtain a first temperature influence coefficient, wherein the reference cell capacity is the cell capacity of the power battery at a preset temperature obtained by pre-testing.

[0064] It is understandable that the first processing subunit is specifically used to: process the reference cell capacity based on the current cell capacity and cell capacity decay parameters to obtain the influence sub-coefficient; and correct the influence sub-coefficient based on the preset correction coefficient to obtain the first temperature influence coefficient.

[0065] Understandably, the second coefficient determination unit 140 includes: a decay parameter acquisition subunit, used to acquire the cell capacity decay parameters of the power battery; a second processing subunit, used to process the reference output power based on the current output power and the cell capacity decay parameters to obtain a first intermediate parameter, wherein the reference output power is the output power of the power battery at a preset temperature obtained through pre-testing; a third processing subunit, used to process the reference open circuit voltage based on the current open circuit voltage and the cell capacity decay parameters to obtain a second intermediate parameter, wherein the reference open circuit voltage is the open circuit voltage of the power battery at a preset temperature obtained through pre-testing; and a first coefficient determination subunit, used to determine a second temperature influence coefficient based on the first intermediate parameter and the second intermediate parameter.

[0066] It is understandable that the first coefficient determination sub-unit is specifically used to: process the first intermediate parameter based on the preset first correction coefficient to obtain the third intermediate parameter; process the second intermediate parameter based on the preset second correction coefficient to obtain the fourth intermediate parameter; and obtain the second temperature influence coefficient based on the third intermediate parameter, the fourth intermediate parameter, and the preset third correction coefficient.

[0067] It is understood that the processing unit 150 includes: a second coefficient determination subunit, used to determine a correction coefficient based on a first temperature influence coefficient and a second temperature influence coefficient; and a mileage calculation subunit, used to obtain the current battery range based on the product of the correction coefficient and the reference battery range.

[0068] It is understandable that the second coefficient determination subunit includes: a coefficient setting module, used to set a third temperature influence coefficient within the value range corresponding to the current temperature; and a coefficient determination module, used to use the sum of the first temperature influence coefficient, the second temperature influence coefficient, and the third temperature influence coefficient as a correction coefficient.

[0069] Understandably, the coefficient setting module is specifically used for the following: if the current temperature is not greater than 0℃, the value range of the third temperature influence coefficient is -0.2 to -0.1; if the current temperature is not greater than 15℃ and is greater than 0℃, the value range of the third temperature influence coefficient is -0.1 to -0.02; if the current temperature is not greater than 35℃ and is greater than 15℃, the value range of the third temperature influence coefficient is 0.02 to 0.1; if the current temperature is not greater than 55℃ and is greater than 35℃, the value range of the third temperature influence coefficient is -0.1 to -0.02.

[0070] It should be understood that further implementation details of the power battery range estimation device 10 in the embodiments of the present invention are as described in the aforementioned power battery range estimation method, and will not be repeated here for the sake of brevity.

[0071] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, such as... Figure 3 As shown, it includes a memory 304, a processor 302, and a computer program stored on the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps described in any embodiment of the power battery range estimation method.

[0072] Among them, Figure 3 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.

[0073] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0074] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0075] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0076] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0077] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for estimating the driving range of a power battery, characterized in that, include: Obtain the current temperature of the environment where the power battery is located; Based on the current temperature, determine the current cell capacity, current output power, and current open-circuit voltage of the power battery; Based on the current cell capacity, a first temperature influence coefficient is determined, including: obtaining the cell capacity decay parameter of the power battery; processing the reference cell capacity based on the current cell capacity and the cell capacity decay parameter to obtain the first temperature influence coefficient, wherein the reference cell capacity is the cell capacity of the power battery at the preset temperature obtained by pre-testing; Determining a second temperature influence coefficient based on the current output power and the current open-circuit voltage includes: obtaining the cell capacity decay parameters of the power battery; processing a reference output power based on the current output power and the cell capacity decay parameters to obtain a first intermediate parameter, wherein the reference output power is the output power of the power battery at a preset temperature obtained through pre-testing; processing a reference open-circuit voltage based on the current open-circuit voltage and the cell capacity decay parameters to obtain a second intermediate parameter, wherein the reference open-circuit voltage is the open-circuit voltage of the power battery at a preset temperature obtained through pre-testing; and determining the second temperature influence coefficient based on the first intermediate parameter and the second intermediate parameter. The reference battery range is processed based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery range of the power battery at the current temperature. The reference battery range is the battery range of the power battery at a preset temperature obtained through pre-testing.

2. The method for estimating the driving range of a power battery according to claim 1, characterized in that, The process of processing the reference cell capacity based on the current cell capacity and the cell capacity decay parameter to obtain the first temperature influence coefficient includes: The reference cell capacity is processed based on the current cell capacity and the cell capacity decay parameter to obtain the influence sub-coefficient; The influence coefficient is corrected based on a preset correction factor to obtain the first temperature influence coefficient.

3. The method for estimating the driving range of a power battery according to claim 1, characterized in that, The step of determining the second temperature influence coefficient based on the first intermediate parameter and the second intermediate parameter includes: The first intermediate parameter is processed based on a preset first correction coefficient to obtain the third intermediate parameter; The second intermediate parameter is processed based on a preset second correction coefficient to obtain the fourth intermediate parameter; The second temperature influence coefficient is obtained based on the third intermediate parameter, the fourth intermediate parameter, and the preset third correction coefficient.

4. The method for estimating the driving range of a power battery according to claim 1, characterized in that, The process of processing the baseline battery range based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery range of the power battery at the current temperature includes: Based on the first temperature influence coefficient and the second temperature influence coefficient, a correction coefficient is determined; The current battery range is obtained by multiplying the correction factor by the baseline battery range.

5. The method for estimating the driving range of a power battery according to claim 4, characterized in that, The step of determining the correction coefficient based on the first temperature influence coefficient and the second temperature influence coefficient includes: Within the range of values ​​corresponding to the current temperature, a third temperature influence coefficient is set; The sum of the first temperature influence coefficient, the second temperature influence coefficient, and the third temperature influence coefficient is used as the correction coefficient.

6. The method for estimating the driving range of a power battery according to claim 5, characterized in that, The step of setting a third temperature influence coefficient within the range corresponding to the current temperature includes: If the current temperature is not greater than 0℃, the value range of the third temperature influence coefficient is -0.2 to -0.1; If the current temperature is not greater than 15℃ and is greater than 0℃, the value range of the third temperature influence coefficient is -0.1 to -0.

02. If the current temperature is not greater than 35℃ and is greater than 15℃, the value range of the third temperature influence coefficient is 0.02 to 0.

1. If the current temperature is not greater than 55℃ and is greater than 35℃, the value range of the third temperature influence coefficient is -0.1 to -0.

02.

7. A power battery range estimation device, characterized in that, include: Temperature acquisition unit, used to acquire the current temperature of the environment where the power battery is located; The parameter determination unit is used to determine the current cell capacity, current output power, and current open-circuit voltage of the power battery based on the current temperature. The first coefficient determination unit is used to determine a first temperature influence coefficient based on the current cell capacity, including: obtaining the cell capacity decay parameter of the power battery; processing the reference cell capacity based on the current cell capacity and the cell capacity decay parameter to obtain the first temperature influence coefficient, wherein the reference cell capacity is the cell capacity of the power battery at the preset temperature obtained by pre-testing; The second coefficient determination unit is used to determine a second temperature influence coefficient based on the current output power and the current open-circuit voltage, including: obtaining the cell capacity decay parameter of the power battery; processing the reference output power based on the current output power and the cell capacity decay parameter to obtain a first intermediate parameter, wherein the reference output power is the output power of the power battery at a preset temperature obtained through pre-testing; processing the reference open-circuit voltage based on the current open-circuit voltage and the cell capacity decay parameter to obtain a second intermediate parameter, wherein the reference open-circuit voltage is the open-circuit voltage of the power battery at a preset temperature obtained through pre-testing; and determining the second temperature influence coefficient based on the first intermediate parameter and the second intermediate parameter. The processing unit is used to process the reference battery range based on the first temperature influence coefficient and the second temperature influence coefficient to obtain the current battery range of the power battery at the current temperature. The reference battery range is the battery range of the power battery at a preset temperature obtained by pre-testing.

8. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of any one of claims 1-6.

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