A method, apparatus and terminal for estimating remaining charging time

Abstract

This invention discloses a method, device, and terminal for estimating remaining charging time, belonging to the field of new energy vehicle battery management technology. The method includes: acquiring the temperature of the power battery; determining the charging mode based on the power battery temperature; determining an initial estimated remaining charging time and a corresponding charging mode correction time based on the charging mode; and determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time. This invention uses the power battery temperature T as the basis for estimating the remaining charging time and performs charging estimation for different charging modes of the power battery, including pure heating mode, simultaneous charging and heating mode, and pure charging mode, to improve the accuracy of remaining charging time estimation.

Description

Technical Field

[0001] This invention discloses a method, device, and terminal for estimating remaining charging time, belonging to the field of new energy vehicle battery management technology. Background Technology

[0002] As the use of pure electric vehicles becomes increasingly widespread, users have higher and higher requirements for their functionality and user experience. Users need to know the remaining charging time in real time during the charging process to better plan their trips. However, due to the complex operating conditions of pure electric vehicles, influenced by factors such as ambient temperature, charging pile performance, terminal thermal management performance, battery temperature rise, and charging strategies, most current models and algorithms for calculating remaining charging time struggle to guarantee accuracy. Summary of the Invention

[0003] The purpose of this invention is to solve the problem of large errors in the accuracy of existing charging remaining time estimation methods, and to propose a method, device and terminal for estimating charging remaining time that is well affected by ambient temperature, charging pile performance, terminal thermal management performance, battery temperature rise and charging strategy, thereby improving the accuracy and robustness of charging remaining time estimation.

[0004] The problem to be solved by this invention is achieved by the following technical solution:

[0005] A method for estimating remaining charging time includes:

[0006] Obtain the power battery temperature and determine the charging mode based on the power battery temperature;

[0007] Based on the charging mode, determine the initial estimated remaining charging time and the corresponding charging mode correction time for the charging mode.

[0008] The remaining charging time for the corresponding charging mode is determined based on the initial estimated remaining charging time and the corresponding charging mode correction time.

[0009] Preferably, the power battery temperature determines the charging mode, including:

[0010] When the temperature of the power battery is lower than the minimum allowable charging temperature of the power battery module, the charging mode is a pure heating mode.

[0011] When the temperature of the power battery is greater than the minimum allowable charging temperature of the power battery module but less than the minimum pure charging temperature of the power battery module, the charging mode is a charging and heating mode.

[0012] When the temperature of the power battery is greater than the minimum temperature for pure charging of the power battery module, the charging mode is pure charging mode.

[0013] Preferably, when the charging mode is a pure charging mode, determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes:

[0014] Obtain the pure charging mode estimation parameters based on the pure charging mode;

[0015] The pure charging mode estimation parameters are determined according to formulas (1) and (2) to determine the initial estimated remaining charging time and the pure charging mode correction time.

[0016]

[0017]

[0018] Where t3 is the initial estimated remaining charging time in pure charging mode, and SOC is... 目标 For the target state of charge, SOC 实际 The current actual state of charge (SOH) represents the battery health status, I(SOC) is the smaller value between the charging current corresponding to the SOC and temperature on the charging map and the maximum output current of the charging pile, and Δt3 is the correction time for pure charging mode. 估算 To estimate the state of charge.

[0019] The step of determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time includes:

[0020] The initial estimated remaining charging time and the pure charging mode correction time are determined according to formula (3) to determine the remaining charging time in the pure charging mode:

[0021] T 纯充电 =t3+Δt3 (3)

[0022] Among them, T 纯充电 Remaining charging time in pure charging mode.

[0023] Preferably, when the charging mode is a simultaneous charging and heating mode, the step of determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes:

[0024] The initial estimated remaining charging time and the corrected charging time for the simultaneous charging and heating mode are determined according to formulas (4) and (5):

[0025]

[0026]

[0027] Where: t2 is the initial estimated remaining charging time in the charging and heating mode, T2 is the minimum temperature of the power battery module during pure charging, K is the temperature rise rate of the power battery module, Δt2 is the correction time for the charging and heating mode, K' is the actual temperature rise rate of the power battery module, and T is the temperature of the power battery.

[0028] Preferably, when the charging mode is a simultaneous charging and heating mode, determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time includes:

[0029] The charging time for each temperature range is determined based on the temperature rise rate of the power battery module.

[0030] Obtain the charging current, maximum output current of the charging pile, and operating current of the vehicle heating module corresponding to the SOC and temperature of the charging map;

[0031] The cumulative state of charge change is determined based on the charging time for each temperature range, the maximum output current of the charging pile, the charging current corresponding to the SOC and temperature of the charging map, and the operating current of the vehicle heating module.

[0032] Determine whether the cumulative target state of charge change is less than the target state of charge:

[0033] Yes, the remaining charging time for the first charging and heating mode is determined according to formula (6):

[0034] T 边充电边加热1 = t2 + t3 + Δt2 + Δt3 (6)

[0035] Among them, T 边充电边加热1 The remaining charging time for the first charging and heating mode;

[0036] No, charging is complete. Determine the remaining charging time for the second charging and heating mode according to formula (7):

[0037] T 边充电边加热2 =t2+Δt2 (7) where, T 边充电边加热2 The remaining charging time for the second charging and heating mode.

[0038] Preferably, the step of determining the cumulative state of charge change based on the charging time for each temperature range, the maximum output current of the charging pile, the charging current corresponding to the SOC and temperature of the charging map, and the operating current of the on-board heating module includes:

[0039] When the charging current corresponding to the SOC and temperature of the charging map is greater than the maximum output current of the charging pile, the first type of cumulative state of charge change is determined by formula (8):

[0040]

[0041] Where SOC1 represents the first type of cumulative state of charge change, t 温度区间 Charge within the temperature range, I 充电桩 I is the maximum output current of the charging pile. 加热模块 This represents the operating current of the vehicle heating module, and SOH represents the health status of the power battery.

[0042] When the charging current corresponding to the SOC and temperature of the charging map is less than the maximum output current of the charging pile, the second type of cumulative state of charge change is determined by formula (9):

[0043]

[0044] Among them, SOC2 is the second type of cumulative state of charge change, I map The charging current corresponds to the SOC and temperature of the charging map, and SOH represents the health status of the power battery.

[0045] Preferably, when the charging mode is a pure heating mode, determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes:

[0046] The pure heating mode determines the initial estimated remaining charging time and the pure heating mode correction time according to formulas (10) and (11):

[0047]

[0048]

[0049] Where: t1 is the initial estimated remaining charging time in pure heating mode, T 预 T1 is the preheating time, K is the minimum allowable charging temperature of the power battery module, Δt1 is the correction time for pure heating mode, K' is the actual temperature rise rate of the power battery module, and T is the power battery temperature.

[0050] Preferably, when the charging mode is a pure heating mode, determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time includes:

[0051] The cumulative state of charge change is determined when the simultaneous charging and heating mode is executed;

[0052] Determine whether the cumulative target state of charge change is less than the target state of charge:

[0053] Yes, the remaining charging time for the first pure heating mode is determined according to formula (6):

[0054] T纯加热模式1 =t1+Δt1+t2+t3+Δt2+Δt3 (12)

[0055] Among them, T 纯加热模式1 Remaining charging time for the first pure heating mode;

[0056] No, charging is complete. Determine the remaining charging time for the second pure heating mode according to formula (7):

[0057] T 纯加热模式2 = t1 + Δt1 + t2 + Δt2 (13)

[0058] Among them, T 纯加热模式2 Remaining charging time for the second pure heating mode.

[0059] A device for estimating remaining charging time, comprising:

[0060] The mode determination module is used to acquire the power battery temperature and determine the charging mode based on the power battery temperature.

[0061] The initial calculation module is used to determine the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode.

[0062] The final calculation module is used to determine the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time.

[0063] A terminal, the terminal comprising:

[0064] One or more sensors are used to collect the current ambient temperature;

[0065] One or more controllers;

[0066] Storage device for storing one or more programs.

[0067] When the one or more programs are executed by the one or more controllers, the one or more controllers implement the charging remaining time estimation method.

[0068] The advantages of this invention compared to existing technologies are as follows:

[0069] (1) The present invention estimates the remaining charging time based on the power battery temperature T, and estimates the charging time for different charging modes of the power battery, such as pure heating mode, charging and heating mode and pure heating mode, in order to improve the accuracy of the remaining charging time estimation.

[0070] (2) The present invention fully considers the impact of low temperature on power battery charging, including pure heating of the power battery to reach the power battery's allowable charging temperature when the temperature is lower than the power battery's allowable charging temperature, and estimating the pure heating time of the power battery.

[0071] (3) This invention fully considers the performance of the charging pile, the performance of the vehicle thermal management system, the abnormality of the vehicle heating module, and the real-time correction of the remaining charging time based on the actual SOC change. Attached Figure Description

[0072] Figure 1 This is a flowchart illustrating a method for estimating remaining charging time according to an exemplary embodiment;

[0073] Figure 2 This is a schematic block diagram illustrating the structure of a charging remaining time estimation device according to an exemplary embodiment;

[0074] Figure 3 This is a schematic block diagram of a terminal structure according to an exemplary embodiment. Detailed Implementation

[0075] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0076] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0077] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0078] Example 1

[0079] Figure 1This is a flowchart illustrating a method for estimating remaining charging time according to an exemplary embodiment. The method is used in a terminal and includes the following steps:

[0080] Step 101: Obtain the power battery temperature and determine the charging mode based on the power battery temperature. The specific details are as follows:

[0081] First, the power battery temperature T is obtained. When the power battery temperature T is less than the minimum allowable charging temperature T1 of the power battery module, the charging mode is a pure heating mode. When the power battery temperature T is greater than the minimum allowable charging temperature T1 of the power battery module but less than the minimum pure charging temperature T2 of the power battery module, the charging mode is a simultaneous charging and heating mode. When the power battery temperature T is greater than the minimum pure charging temperature T2 of the power battery module, the charging mode is a pure charging mode.

[0082] Step 102: Determine the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode. The specific details are as follows:

[0083] When the charging mode is pure charging mode, obtain the pure charging mode estimation parameters based on the pure charging mode.

[0084] The pure charging mode estimation parameters are determined according to formulas (1) and (2) to determine the initial estimated remaining charging time and the pure charging mode correction time.

[0085]

[0086]

[0087] Where t3 is the initial estimated remaining charging time in pure charging mode, and SOC is... 目标 For the target state of charge, SOC 实际 The current actual state of charge (SOH) represents the battery health status, I(SOC) is the smaller value between the charging current corresponding to the SOC and temperature on the charging map and the maximum output current of the charging pile, and Δt3 is the correction time for pure charging mode. 估算 To estimate the state of charge.

[0088] When the charging mode is simultaneous charging and heating mode, the initial estimated remaining charging time and the correction time for simultaneous charging and heating mode are determined according to formulas (4) and (5):

[0089]

[0090]

[0091] Where: t2 is the initial estimated remaining charging time in the charging and heating mode, T2 is the minimum temperature of the power battery module during pure charging, K is the temperature rise rate of the power battery module, Δt2 is the correction time for the charging and heating mode, K' is the actual temperature rise rate of the power battery module, and T is the temperature of the power battery.

[0092] When the charging mode is a pure heating mode, determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes:

[0093] The pure heating mode determines the initial estimated remaining charging time and the pure heating mode correction time according to formulas (10) and (11):

[0094]

[0095]

[0096] Where: t1 is the initial estimated remaining charging time in pure heating mode, T 预 Preheating time refers to the time it takes for the coolant to heat to the target temperature. The coolant temperature and preheating time can be obtained through experiments. The power battery module temperature rise rate K can also be obtained by conducting experiments in different temperature ranges. T1 is the minimum allowable charging temperature of the power battery module, K is the power battery module temperature rise rate, Δt1 is the correction time for pure heating mode, K' is the actual power battery module temperature rise rate, and T is the power battery temperature.

[0097] Step 103: Determine the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time. The specific details are as follows:

[0098] When the charging mode is pure charging mode, the initial estimated remaining charging time and the pure charging mode correction time are determined according to formula (3) to determine the remaining charging time in pure charging mode:

[0099] T 纯充电 =t3+Δt3 (3)

[0100] Among them, T 纯充电 Remaining charging time in pure charging mode.

[0101] When the charging mode is the simultaneous charging and heating mode, the charging time for each temperature range is determined according to the temperature rise rate of the power battery module.

[0102] Obtain the charging current, maximum output current of the charging pile, and operating current of the vehicle heating module corresponding to the SOC and temperature of the charging map;

[0103] The cumulative state of charge change is determined based on the charging time for each temperature range, the maximum output current of the charging pile, the charging current corresponding to the SOC and temperature of the charging map, and the operating current of the on-board heating module. The details are as follows:

[0104] When the charging current corresponding to the SOC and temperature of the charging map is greater than the maximum output current of the charging pile, the first type of cumulative state of charge change is determined by formula (8):

[0105]

[0106] Where SOC1 represents the first type of cumulative state of charge change, t 温度区间 Charge within the temperature range, I 充电桩 I is the maximum output current of the charging pile. 加热模块 This represents the operating current of the vehicle heating module, and SOH represents the health status of the power battery.

[0107] When the charging current corresponding to the SOC and temperature of the charging map is less than the maximum output current of the charging pile, the second type of cumulative state of charge change is determined by formula (9):

[0108]

[0109] Among them, SOC2 is the second type of cumulative state of charge change, I map The charging current corresponds to the SOC and temperature of the charging map, and SOH represents the health status of the power battery.

[0110] Determine whether the cumulative target state of charge is less than the target state of charge based on the cumulative target state of charge change:

[0111] Yes, the remaining charging time for the first charging and heating mode is determined according to formula (6):

[0112] T 边充电边加热1 = t2 + t3 + Δt2 + Δt3 (6)

[0113] Among them, T 边充电边加热1 The remaining charging time for the first charging and heating mode;

[0114] No, charging is complete. Determine the remaining charging time for the second charging and heating mode according to formula (7):

[0115] T 边充电边加热2 =t2+Δt2 (7)

[0116] Among them, T 边充电边加热2 The remaining charging time for the second charging and heating mode.

[0117] When the charging mode is pure heating mode, the cumulative state of charge change is determined when the simultaneous charging and heating mode is executed.

[0118] Determine whether the cumulative target state of charge is less than the target state of charge based on the cumulative target state of charge change:

[0119] Yes, the remaining charging time for the first pure heating mode is determined according to formula (6):

[0120] T 纯加热模式1 =t1+Δt1+t2+t3+Δt2+Δt3 (12)

[0121] Among them, T 纯加热模式1 Remaining charging time for the first pure heating mode;

[0122] No, charging is complete. Determine the remaining charging time for the second pure heating mode according to formula (7):

[0123] T 纯加热模式2 = t1 + Δt1 + t2 + Δt2 (13)

[0124] Among them, T 纯加热模式2 Remaining charging time for the second pure heating mode.

[0125] In formulas (12) and (13), when calculating the initial estimated remaining charging time t2 for the simultaneous charging and heating mode, if T is less than T1, T is taken as T1 in the formula; if T is greater than T1, T is used in the formula. In formula (12), when calculating the initial estimated remaining charging time t3 for the pure charging mode, if T is less than T2, it is estimated according to T2, and the SOC is calculated according to the SOC after the change in the output of the simultaneous charging and heating estimation module; if T is greater than T2, it is calculated according to T and the initial SOC.

[0126] Example 2

[0127] Figure 2 This is a schematic block diagram illustrating the structure of a charging remaining time estimation device according to an exemplary embodiment, the device comprising:

[0128] The mode determination module 210 is used to acquire the power battery temperature and determine the charging mode based on the power battery temperature.

[0129] The initial calculation module 220 is used to determine the initial estimated remaining charging time and the corresponding charging mode correction time according to the charging mode.

[0130] The final calculation module 230 is used to determine the remaining charging time of the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time.

[0131] This invention estimates the remaining charging time based on the battery temperature T, and improves the accuracy of the remaining charging time estimation by performing charging time estimations for different charging modes: pure heating mode, simultaneous charging and heating mode, and pure heating mode. This invention fully considers the impact of low temperatures on battery charging, including pure heating of the battery to reach its allowable charging temperature when the temperature is below the allowable charging temperature, and estimating the pure heating time. This invention also fully considers the performance of the charging pile, the performance of the vehicle's thermal management system, abnormalities in the vehicle's heating module, and real-time correction of the remaining charging time based on actual SOC changes.

[0132] Example 3

[0133] Figure 3 This is a schematic diagram of a terminal structure provided in Embodiment 4 of the present invention. The terminal 400 can be a portable mobile terminal, such as a smartphone or tablet computer. The terminal 400 may also be referred to as a battery management system, etc. The terminal includes a processor 301 and a memory 302.

[0134] Processor 301 may include one or more processing cores, such as a quad-core processor or an octa-core processor. Processor 301 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 301 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 301 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 301 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0135] Memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 302 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in memory 302 is used to store at least one instruction, which is executed by processor 301 to implement a charging remaining time estimation method provided in this application.

[0136] Example 4

[0137] In an exemplary embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements a method for estimating remaining charging time as provided in all embodiments of the present application.

[0138] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0139] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0140] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0141] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0142] Example 5

[0143] In an exemplary embodiment, an application product is also provided, including one or more instructions that can be executed by the processor 301 of the aforementioned device to complete the aforementioned method for estimating remaining charging time.

[0144] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A method for estimating remaining charging time, characterized in that, include: Obtain the power battery temperature and determine the charging mode based on the power battery temperature; Based on the charging mode, determine the initial estimated remaining charging time and the corresponding charging mode correction time for the charging mode. The remaining charging time for the corresponding charging mode is determined based on the initial estimated remaining charging time and the corresponding charging mode correction time. The power battery temperature determines the charging mode, including: When the temperature of the power battery is lower than the minimum allowable charging temperature of the power battery module, the charging mode is a pure heating mode. When the temperature of the power battery is greater than the minimum allowable charging temperature of the power battery module but less than the minimum pure charging temperature of the power battery module, the charging mode is a charging and heating mode. When the temperature of the power battery is greater than the minimum temperature for pure charging of the power battery module, the charging mode is pure charging mode. Wherein, when the charging mode is a pure charging mode, determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes: Obtain the pure charging mode estimation parameters based on the pure charging mode; The pure charging mode estimation parameters are determined according to formulas (1) and (2) to determine the initial estimated remaining charging time and the pure charging mode correction time. Where t3 is the initial estimated remaining charging time in pure charging mode, and SOC is... 目标 For the target state of charge, SOC 实际 The current actual state of charge (SOH) represents the battery health status, I(SOC) is the smaller value between the charging current corresponding to the SOC and temperature on the charging map and the maximum output current of the charging pile, and Δt3 is the correction time for pure charging mode. 估算 To estimate the state of charge; The step of determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time includes: The initial estimated remaining charging time and the pure charging mode correction time are determined according to formula (3) to determine the remaining charging time in the pure charging mode: T 纯充电 < t3+△t3 (3) Among them, T 纯充电 Remaining charging time in pure charging mode.

2. The method for estimating remaining charging time according to claim 1, characterized in that, When the charging mode is a simultaneous charging and heating mode, determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes: The initial estimated remaining charging time and the corrected charging time for the simultaneous charging and heating mode are determined according to formulas (4) and (5): Where: t2 is the initial estimated remaining charging time in the charging and heating mode, T2 is the minimum temperature of the power battery module during pure charging, K is the temperature rise rate of the power battery module, Δt2 is the correction time for the charging and heating mode, K' is the actual temperature rise rate of the power battery module, and T is the temperature of the power battery.

3. The method for estimating remaining charging time according to claim 2, characterized in that, When the charging mode is a simultaneous charging and heating mode, determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time includes: The charging time for each temperature range is determined based on the temperature rise rate of the power battery module. Obtain the charging current, maximum output current of the charging pile, and operating current of the vehicle heating module corresponding to the SOC and temperature of the charging map; The cumulative state of charge change is determined based on the charging time for each temperature range, the maximum output current of the charging pile, the charging current corresponding to the SOC and temperature of the charging map, and the operating current of the vehicle heating module. Determine whether the cumulative target state of charge is less than the target state of charge based on the cumulative target state of charge change: Yes, the remaining charging time for the first charging and heating mode is determined according to formula (6): T 边充电边加热1 =t2+t3+Δt2+Δt3 (6) Among them, T 边充电边加热1 The remaining charging time for the first charging and heating mode; No, charging is complete. Determine the remaining charging time for the second charging and heating mode according to formula (7): T 边充电边加热2 =t2+Δt2 (7) Among them, T 边充电边加热2 The remaining charging time for the second charging and heating mode.

4. The method for estimating remaining charging time according to claim 3, characterized in that, The determination of cumulative state of charge change based on the charging time for each temperature range, the maximum output current of the charging pile, the charging current corresponding to the SOC and temperature of the charging map, and the operating current of the on-board heating module includes: When the charging current corresponding to the SOC and temperature of the charging map is greater than the maximum output current of the charging pile, the first type of cumulative state of charge change is determined by formula (8): Where SOC1 represents the first type of cumulative state of charge change, t 温度区间 Charge within the temperature range, I 充电桩 I is the maximum output current of the charging pile. 加热模块 This represents the operating current of the vehicle heating module, and SOH represents the battery health status. When the charging current corresponding to the SOC and temperature of the charging map is less than the maximum output current of the charging pile, the second type of cumulative state of charge change is determined by formula (9): Among them, SOC2 is the second type of cumulative state of charge change, I map The charging current corresponds to the SOC and temperature of the charging map, and SOH represents the battery health status.

5. The method for estimating remaining charging time according to claim 4, characterized in that, When the charging mode is a pure heating mode, determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes: The pure heating mode determines the initial estimated remaining charging time and the pure heating mode correction time according to formulas (10) and (11): Where: t1 is the initial estimated remaining charging time in pure heating mode, T 预 T1 is the preheating time, K is the minimum allowable charging temperature of the power battery module, Δt1 is the correction time for pure heating mode, K' is the actual temperature rise rate of the power battery module, and T is the power battery temperature.

6. The method for estimating remaining charging time according to claim 5, characterized in that, When the charging mode is a pure heating mode, determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time includes: The cumulative state of charge change is determined when the simultaneous charging and heating mode is executed; Determine whether the cumulative target state of charge change is less than the target state of charge: Yes, the remaining charging time for the first pure heating mode is determined according to formula (6): T 纯加热模式1 =t1+Δt1+t2+t3+Δt2+Δt3 (12) Among them, T 纯加热模式1 Remaining charging time for the first pure heating mode; No, charging is complete. Determine the remaining charging time for the second pure heating mode according to formula (7): T 纯加热模式2 =t1+Δt1+t2+Δt2 (13) Among them, T 纯加热模式2 Remaining charging time for the second pure heating mode.

7. A device for estimating remaining charging time, characterized in that, include: The mode determination module is used to acquire the power battery temperature and determine the charging mode based on the power battery temperature. The initial calculation module is used to determine the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode. The final calculation module is used to determine the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time. The power battery temperature determines the charging mode, including: When the temperature of the power battery is lower than the minimum allowable charging temperature of the power battery module, the charging mode is a pure heating mode. When the temperature of the power battery is greater than the minimum allowable charging temperature of the power battery module but less than the minimum pure charging temperature of the power battery module, the charging mode is a charging and heating mode. When the temperature of the power battery is greater than the minimum temperature for pure charging of the power battery module, the charging mode is pure charging mode. Wherein, when the charging mode is a pure charging mode, determining the initial estimated remaining charging time and the corresponding charging mode correction time based on the charging mode includes: Obtain the pure charging mode estimation parameters based on the pure charging mode; The pure charging mode estimation parameters are determined according to formulas (1) and (2) to determine the initial estimated remaining charging time and the pure charging mode correction time. Where t3 is the initial estimated remaining charging time in pure charging mode, and SOC is... 目标 For the target state of charge, SOC 实际 The current actual state of charge (SOH) represents the battery health status, I(SOC) is the smaller value between the charging current corresponding to the SOC and temperature on the charging map and the maximum output current of the charging pile, and Δt3 is the correction time for pure charging mode. 估算 To estimate the state of charge; The step of determining the remaining charging time for the corresponding charging mode based on the initial estimated remaining charging time and the corresponding charging mode correction time includes: The initial estimated remaining charging time and the pure charging mode correction time are determined according to formula (3) to determine the remaining charging time in the pure charging mode: T 纯充电 =t3+Δt3 (3) Among them, T 纯充电 Remaining charging time in pure charging mode.

8. A terminal, characterized in that, The terminal includes: One or more sensors are used to collect the current ambient temperature; One or more controllers; Storage device for storing one or more programs. When the one or more programs are executed by the one or more controllers, the one or more controllers implement a charging remaining time estimation method as described in any one of claims 1-6.

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