CN115195521A - Charging remaining time estimation method, device and terminal - Google Patents

Charging remaining time estimation method, device and terminal Download PDF

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Publication number
CN115195521A
CN115195521A CN202210747281.1A CN202210747281A CN115195521A CN 115195521 A CN115195521 A CN 115195521A CN 202210747281 A CN202210747281 A CN 202210747281A CN 115195521 A CN115195521 A CN 115195521A
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charging
mode
charge
pure
remaining time
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Inventor
侯典坤
翟一明
荣常如
马腾翔
范广冲
张兴瑞
牛春静
王君君
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FAW Group Corp
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FAW Group Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a charging remaining time estimation method, a device and a terminal, belonging to the technical field of new energy automobile battery management and comprising the following steps: acquiring the temperature of a power battery, and determining a charging mode according to the temperature of the power battery; determining initial estimated charging remaining time of a corresponding charging mode and corresponding charging mode correction time according to the charging mode; and determining the charging remaining time of the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode correction time. The invention judges the charging remaining time estimation by the temperature T of the power battery, and carries out charging estimation aiming at different charging modes of the power battery, such as a pure heating mode, a heating mode while charging and a pure charging mode, so as to improve the estimation precision of the charging remaining time.

Description

Charging remaining time estimation method, device and terminal
Technical Field
The invention discloses a charging remaining time estimation method, a charging remaining time estimation device and a charging remaining time estimation terminal, and belongs to the technical field of new energy automobile battery management.
Background
The use of pure electric terminals is more and more popularized, and the user is higher and higher to pure electric terminals's functional requirement, and is higher and higher to the use experience requirement, and the user needs to know terminal remaining time that charges in real time at pure electric vehicle charging process to in better arrangement trip plan etc.. Due to the fact that the pure electric terminal is complex in use working condition and affected by environment temperature, charging pile performance, terminal heat management performance, battery temperature rise, charging strategies and the like, most of charging remaining time calculation models and algorithms are difficult to guarantee accuracy at present.
Disclosure of Invention
The invention aims to solve the problem of large error of the existing estimation precision of the charging remaining time, and provides a charging remaining time estimation method, a device and a terminal which are well influenced by environmental temperature, charging pile performance, terminal thermal management performance, battery temperature rise, charging strategy and the like and improve the precision and robustness of the charging remaining time.
The invention aims to solve the problems by the following technical scheme:
a charge remaining time estimation method, comprising:
acquiring the temperature of a power battery, and determining a charging mode according to the temperature of the power battery;
determining initial estimated charging remaining time of a corresponding charging mode and corresponding charging mode correction time according to the charging mode;
and determining the charging remaining time of the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode correction time.
Preferably, the power battery temperature determines a charging mode, including:
when the temperature of the power battery is lower than the lowest temperature of the power battery module allowed to be charged, the charging mode is a pure heating mode;
when the temperature of the power battery is higher than the lowest temperature of the power battery module allowed to be charged and lower than the lowest temperature of the power battery module pure charging, the charging mode is a charging-while-heating mode;
and when the temperature of the power battery is higher than the lowest pure charging temperature of the power battery module, the charging mode is a pure charging mode.
Preferably, when the charging mode is a pure charging mode, the determining the initial estimated charging remaining time of the corresponding charging mode and the corresponding charging mode correction time according to the charging mode includes:
acquiring pure charging mode estimation parameters according to the pure charging mode;
the pure-charge mode estimation parameter determines an initial estimated charge remaining time in the pure-charge mode and a correction time in the pure-charge mode according to equations (1) and (2):
Figure BDA0003717302510000021
Figure BDA0003717302510000022
wherein, t 3 Initial estimation of charge remaining time, SOC, for a pure charge mode Target To a target state of charge, SOC Practice of For the current actual state of charge, SOH is the state of health of the power battery, and I (SOC) is the state of charge map corresponding to SThe charging current of OC and temperature and the maximum output current of the charging pile are smaller, namely delta t 3 Correcting time, SOC, for pure charge mode Estimating To estimate the state of charge.
The determining the charging remaining time of the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode correction time comprises:
the pure charge mode initial estimated charge remaining time and the pure charge mode corrected time determine the pure charge mode charge remaining time according to equation (3):
T pure charging ＝t 3 +Δt 3 (3)
Wherein, T Pure charging Charging for the pure charge mode for the remaining time.
Preferably, when the charging mode is a charging while heating mode, the determining the initial estimated charging remaining time of the corresponding charging mode and the corresponding charging mode correction time according to the charging mode includes:
determining an initial estimated charge remaining time in the charging while heating mode and a correction time in the charging while heating mode according to equations (4) and (5):
Figure BDA0003717302510000031
Figure BDA0003717302510000032
wherein: t is t 2 Initial estimation of charge remaining time, T, for a charge while heating mode 2 The lowest pure charging temperature of the power battery module, K is the temperature rise rate of the power battery module, delta t 2 And correcting time in a heating mode while charging, wherein K' is the actual temperature rise rate of the power battery module, and T is the temperature of the power battery.
Preferably, when the charging mode is a charging while heating mode, the determining the charging remaining time of the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode correction time includes:
determining the charging time of each temperature interval according to the temperature rise rate of the power battery module;
acquiring charging current of the SOC and the temperature corresponding to the charging map, the maximum output current of the charging pile and the working current of the vehicle-mounted heating module;
determining the change of the accumulated state of charge according to the charging time of each temperature interval, the maximum output current of the charging pile, the charging current of the SOC and the temperature corresponding to the charging map and the working current of the vehicle-mounted heating module;
judging whether the accumulated target state of charge change is smaller than the target state of charge:
then, the charging remaining time in the first charging while heating mode is determined according to the formula (6):
T heating while charging 1 ＝t 2 +t 3 +Δt 2 +Δt 3 (6)
Wherein, T Heating while charging 1 Charging the first charging while heating mode for the remaining time;
if not, the charging is finished, and the charging remaining time in the second charging and heating mode is determined according to the formula (7):
T heating while charging 2 ＝t 2 +Δt 2 (7)
Wherein, T Heating while charging 2 Charging the second charging while heating mode for the remaining time.
Preferably, the determining the change of the accumulated state of charge according to the charging time of each temperature interval, the maximum output current of the charging pile, the charging current of the SOC and the temperature corresponding to the charging map, and the working current of the vehicle-mounted heating module includes:
when the charging current of the SOC and the temperature corresponding to the charging map is larger than the maximum output current of the charging pile, determining the first accumulated state of charge change through a formula (8):
Figure BDA0003717302510000041
therein, SOC 1 Is the first cumulative state of charge change, t Temperature interval Temperature interval charging amount, I Charging pile For maximum output current of charging pile, I Heating module The working current of the vehicle-mounted heating module is shown, and the SOH is the health degree of the power battery;
when the charging current of the SOC and the temperature corresponding to the charging map is less than the maximum output current of the charging pile, determining a second accumulated state of charge change through a formula (9):
Figure BDA0003717302510000042
wherein, SOC 2 Is a second cumulative state of charge change, I map And charging current corresponding to SOC and temperature for the charging map, and SOH is the health degree of the power battery.
Preferably, when the charging mode is a pure heating mode, the determining the initial estimated charging remaining time of the corresponding charging mode and the corresponding charging mode correction time according to the charging mode includes:
the pure heating mode determines a pure heating mode initial estimated charge remaining time and a pure heating mode correction time according to equations (10) and (11):
Figure BDA0003717302510000043
Figure BDA0003717302510000044
wherein: t is t 1 Initial estimation of charge remaining time, T, for pure heating mode Preparing For preheating time, T 1 The lowest allowable charging temperature of the power battery module is K, the temperature rise rate of the power battery module is delta t 1 For the pure heating mode correction time, K' is the actual power battery module temperature rise rate, and T is the power battery temperature.
Preferably, when the charging mode is a pure heating mode, the determining the corresponding charging mode charging remaining time according to the initial estimated charging remaining time and the corresponding charging mode correction time includes:
determining an accumulated state of charge change while executing the charge while heating mode;
judging whether the accumulated target state of charge is smaller than the target state of charge according to the accumulated target state of charge change:
then, the first pure heating mode charge remaining time is determined according to equation (6):
T pure heating mode 1 ＝t 1 +Δt 1 +t 2 +t 3 +Δt 2 +Δt 3 (12)
Wherein, T Pure heating mode 1 Charging the first pure heating mode for the remaining time;
if not, the charging is completed, and the charging remaining time in the second pure heating mode is determined according to the formula (7):
T pure heating mode 2 ＝t 1 +Δt 1 +t 2 +Δt 2 (13)
Wherein, T Pure heating mode 2 Charging the second pure heating mode for the remaining time.
A charge remaining time estimation device comprising:
the mode determining module is used for acquiring the temperature of the power battery and determining a charging mode according to the temperature of the power battery;
the initial calculation module is used for determining initial estimated charging remaining time of a corresponding charging mode and corresponding charging mode correction time according to the charging mode;
and the final calculation module is used for determining the charging residual time of the corresponding charging mode according to the initial estimated charging residual time and the corresponding charging mode correction time.
A terminal, the terminal comprising:
one or more sensors for acquiring a current ambient temperature;
one or more controllers;
a 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 are caused to implement the one charge remaining time estimating method.
Compared with the prior art, the invention has the following beneficial effects:
(1) The method judges the charging remaining time estimation according to the temperature T of the power battery, and carries out charging estimation aiming at a pure heating mode, a heating mode while charging and a pure heating mode of different charging modes of the power battery so as to improve the estimation precision of the charging remaining time;
(2) The method fully considers the influence of low temperature on the charging of the power battery, including that when the temperature is lower than the allowable charging temperature of the power battery, the power battery is purely heated to reach the allowable charging temperature of the power battery, and the pure heating time of the power battery is estimated;
(3) The charging pile performance, the performance of a whole vehicle heat management system, the abnormity of a whole vehicle heating module and the real-time correction of the charging remaining time are fully considered.
Drawings
FIG. 1 is a flow chart illustrating a charge remaining time estimation method according to an exemplary embodiment;
fig. 2 is a block diagram schematically illustrating a structure of a charge remaining time estimating apparatus according to an exemplary embodiment;
fig. 3 is a schematic block diagram of a terminal structure shown in accordance with an example embodiment.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Fig. 1 is a flowchart illustrating a charge remaining time estimation method for use in a terminal according to an exemplary embodiment, the method including the steps of:
step 101, obtaining the temperature of a power battery, and determining a charging mode according to the temperature of the power battery, wherein the specific contents are as follows:
firstly, obtaining the temperature T of the power battery, and when the temperature T of the power battery is less than the lowest allowable charging temperature T of the power battery module 1 When the charging mode is a pure heating mode; when the temperature T of the power battery is greater than the lowest allowable charging temperature T of the power battery module 1 And is less than the lowest pure charging temperature T of the power battery module 2 When the charging mode is a charging and heating mode; when the temperature T of the power battery is greater than the pure charging minimum temperature T of the power battery module 2 And when the charging mode is the pure charging mode.
Step 102, determining the initial estimated charging remaining time of the corresponding charging mode and the correction time of the corresponding charging mode according to the charging mode, wherein the specific contents are as follows:
when the charging mode is a pure charging mode, acquiring pure charging mode estimation parameters according to the pure charging mode;
the pure-charge mode estimation parameter determines an initial estimated charge remaining time in the pure-charge mode and a correction time in the pure-charge mode according to equations (1) and (2):
Figure BDA0003717302510000071
Figure BDA0003717302510000081
wherein, t 3 Initial estimation of charge remaining time, SOC, for a pure charge mode Target To a target state of charge, SOC Practice of For the current actual state of charge, SOH is the state of health of the power battery, I (SOC) is the smaller value of the charging current of the SOC and the temperature corresponding to the charging map and the maximum output current of the charging pile, and delta t 3 Correcting time, SOC, for pure charge mode Estimating To estimate the state of charge.
When the charging mode is the heating mode while charging, the initial estimated charge remaining time of the heating mode while charging and the correction time of the heating mode while charging are determined according to the equations (4) and (5):
Figure BDA0003717302510000082
Figure BDA0003717302510000083
wherein: t is t 2 Initial estimation of charge remaining time, T, for a charge while heating mode 2 The lowest pure charging temperature of the power battery module, K is the temperature rise rate of the power battery module, delta t 2 And correcting time in a heating mode while charging, wherein K' is the actual temperature rise rate of the power battery module, and T is the temperature of the power battery.
When the charging mode is a pure heating mode, determining the initial estimated charging remaining time of the corresponding charging mode and the correction time of the corresponding charging mode according to the charging mode comprises the following steps:
the pure heating mode determines a pure heating mode initial estimated charge remaining time and a pure heating mode correction time according to equations (10) and (11):
Figure BDA0003717302510000084
Figure BDA0003717302510000085
wherein: t is t 1 Initial estimation of charge remaining time, T, for pure heating mode Preparing For the preheating time, the time for heating the cooling liquid to the target temperature is indicated, the temperature of the cooling liquid and the preheating time table and the temperature rise rate K of the power battery module can be obtained through tests, and the temperature rise rate T of the power battery module at the corresponding temperature can also be obtained through tests in different temperature intervals 1 Allowing the lowest charging temperature for the power battery module, K being the temperature rise rate of the power battery module, deltat 1 And correcting time for a pure heating mode, wherein K' is the actual temperature rise rate of the power battery module, and T is the temperature of the power battery.
Step 103, determining the charging remaining time of the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode correction time, wherein the specific contents are as follows:
when the charge mode is the pure charge mode, the pure charge mode initial estimated charge remaining time and the pure charge mode corrected time determine the pure charge mode charge remaining time according to the formula (3):
T pure charging ＝t 3 +Δt 3 (3)
Wherein, T Pure charging Charging for the pure charge mode for the remaining time.
When the charging mode is a heating mode while charging, determining the charging time of each temperature interval according to the temperature rise rate of the power battery module;
acquiring charging current of SOC and temperature corresponding to the charging map, maximum output current of the charging pile and working current of the vehicle-mounted heating module;
determining the change of the accumulated state of charge according to the charging time of each temperature interval, the maximum output current of the charging pile, the charging current of the SOC and the temperature corresponding to the charging map and the working current of the vehicle-mounted heating module, wherein the specific contents are as follows:
when the charging current of the SOC and the temperature corresponding to the charging map is larger than the maximum output current of the charging pile, determining the first accumulated state of charge change through a formula (8):
Figure BDA0003717302510000091
therein, SOC 1 Is the first cumulative state of charge change, t Temperature interval Temperature interval is charged with electricity, I Charging pile For maximum output current of charging pile, I Heating module The working current of the vehicle-mounted heating module is shown, and the SOH is the health degree of the power battery;
when the charging current of the charging map corresponding to the SOC and the temperature is less than the maximum output current of the charging pile, determining a second accumulated state of charge change through a formula (9):
Figure BDA0003717302510000092
therein, SOC 2 Is a second cumulative state of charge change, I map And charging current corresponding to the SOC and the temperature of the charging map, and SOH is the health degree of the power battery.
Judging whether the accumulated target state of charge is less than the target state of charge according to the accumulated target state of charge change:
then, the charging remaining time in the first charging while heating mode is determined according to the formula (6):
T heating while charging 1 ＝t 2 +t 3 +Δt 2 +Δt 3 (6)
Wherein, T Heating while charging 1 Charging the first charging while heating mode for the remaining time;
if not, the charging is finished, and the charging remaining time in the second charging and heating mode is determined according to the formula (7):
T heating while charging 2 ＝t 2 +Δt 2 (7)
Wherein, T Heating while charging 2 Charging the second charging while heating mode for the remaining time.
When the charging mode is a pure heating mode, determining the accumulated state of charge change in the heating mode while charging is executed;
judging whether the accumulated target state of charge is smaller than the target state of charge according to the accumulated target state of charge change:
then, the first pure heating mode charge remaining time is determined according to equation (6):
T pure heating mode 1 ＝t 1 +Δt 1 +t 2 +t 3 +Δt 2 +Δt 3 (12)
Wherein, T Pure heating mode 1 Charging a first pure heating mode for a remaining time;
if not, the charging is completed, and the charging remaining time in the second pure heating mode is determined according to the formula (7):
T pure heating mode 2 ＝t 1 +Δt 1 +t 2 +Δt 2 (13)
Wherein, T Pure heating mode 2 Charging the second pure heating mode for the remaining time.
When the charging remaining time T2 is initially estimated in the heating mode while charging in equations (12) and (13), if T is less than T1, T in the equation is T1, and if T is greater than T1, T is used in the equation. Calculating the initial estimated charge remaining time t for the pure charge mode in equation (12) 3 If T is less than T 2 According to T 2 Estimating, wherein the SOC is calculated according to the changed SOC output by the charging and heating estimation module; if T is greater than T 2 Calculated as T and initial SOC.
Example two
Fig. 2 is a block diagram schematically illustrating a structure of a charge remaining time estimating apparatus according to an exemplary embodiment, the apparatus including:
the mode determining module 210 is configured to obtain a temperature of the power battery, and determine a charging mode according to the temperature of the power battery;
an initial calculation module 220, configured to determine, according to the charging mode, an initial estimated charging remaining time of the corresponding charging mode and a corresponding charging mode correction time;
and a final calculating module 230, configured to determine a charging remaining time in the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode modification time.
The method judges the charging remaining time estimation according to the temperature T of the power battery, and carries out charging estimation aiming at a pure heating mode, a heating mode while charging and a pure heating mode of different charging modes of the power battery so as to improve the estimation precision of the charging remaining time; the method fully considers the influence of low temperature on the charging of the power battery, including that when the temperature is lower than the allowable charging temperature of the power battery, the power battery is purely heated to reach the allowable charging temperature of the power battery, and the pure heating time of the power battery is estimated; the charging pile performance, the performance of a whole vehicle heat management system and the abnormity of a whole vehicle heating module are fully considered, and the charging residual time is corrected in real time according to the real SOC change.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a terminal according to a fourth embodiment of the present invention, where the terminal 400 may be a portable mobile terminal, such as: smart phones, tablet computers. The terminal 400 may also be referred to as a battery management system or the like. The terminal comprises: a processor 301 and a memory 302.
The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 301 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit) that is responsible for rendering and drawing content that the display screen needs to display. In some embodiments, the processor 301 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.
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, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in the memory 302 is used to store at least one instruction for execution by the processor 301 to implement a charge remaining time estimation method provided herein.
Example four
In an exemplary embodiment, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a charge remaining time estimation method as provided in all inventive embodiments of the present application.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
EXAMPLE five
In an exemplary embodiment, an application program product is also provided, which includes one or more instructions executable by the processor 301 of the apparatus to perform the charge remaining time estimation method.
While embodiments of the invention have been disclosed above, it is not intended that they be limited to the applications set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.

Claims (10)

1. A charge remaining time estimation method, comprising:
acquiring the temperature of a power battery, and determining a charging mode according to the temperature of the power battery;
determining initial estimated charging remaining time of a corresponding charging mode and correction time of the corresponding charging mode according to the charging mode;
and determining the charging remaining time of the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode correction time.
2. The method of claim 1, wherein the power battery temperature determines a charging mode comprising:
when the temperature of the power battery is lower than the lowest temperature of the power battery module allowed to be charged, the charging mode is a pure heating mode;
when the temperature of the power battery is higher than the lowest temperature of the power battery module allowed to be charged and lower than the lowest temperature of the power battery module pure charging, the charging mode is a charging-while-heating mode;
and when the temperature of the power battery is higher than the lowest pure charging temperature of the power battery module, the charging mode is a pure charging mode.
3. The method of claim 2, wherein said determining a corresponding charging mode initial estimated charging remaining time and a corresponding charging mode corrected time according to said charging mode when said charging mode is a pure charging mode comprises:
acquiring pure charging mode estimation parameters according to the pure charging mode;
the pure charge mode estimation parameter determines a pure charge mode initial estimation charge remaining time and a pure charge mode correction time according to equations (1) and (2):
Figure FDA0003717302500000011
Figure FDA0003717302500000012
wherein, t 3 Initial estimation of charge remaining time, SOC, for a pure charge mode Target To a target state of charge, SOC Practice of For the current actual state of charge, SOH is the state of health of the power battery, I (SOC) is the smaller value of the charging current of the charging map corresponding to SOC and temperature and the maximum output current of the charging pile, and delta t 3 Correcting time, SOC, for a pure charge mode Estimating To estimate the state of charge.
The determining the charging remaining time of the corresponding charging mode according to the initial estimated charging remaining time and the corresponding charging mode correction time comprises:
the pure charge mode initial estimated charge remaining time and the pure charge mode correction time determine the pure charge mode charge remaining time according to formula (3):
T pure charging ＝t 3 +Δt 3 (3)
Wherein, T Pure charging Charging for the pure charge mode for the remaining time.
4. The method of claim 3, wherein said determining a corresponding charging mode initial estimated charging remaining time and a corresponding charging mode corrected time according to said charging mode when said charging mode is a charging while heating mode comprises:
determining an initial estimated charge remaining time in the charging while heating mode and a correction time in the charging while heating mode according to equations (4) and (5):
Figure FDA0003717302500000021
Figure FDA0003717302500000022
wherein: t is t 2 Initial estimation of charge remaining time, T, for a charge-while-heating mode 2 The lowest pure charging temperature of the power battery module, K is the temperature rise rate of the power battery module, and delta t 2 And correcting time in a heating mode while charging, wherein K' is the actual temperature rise rate of the power battery module, and T is the temperature of the power battery.
5. The method of claim 4, wherein said determining a corresponding charging mode charge remaining time based on said initial estimated charge remaining time and a corresponding charging mode corrected time when said charging mode is a charging while heating mode comprises:
determining the charging time of each temperature interval according to the temperature rise rate of the power battery module;
acquiring charging current of the SOC and the temperature corresponding to the charging map, the maximum output current of the charging pile and the working current of the vehicle-mounted heating module;
determining the change of the accumulated state of charge according to the charging time of each temperature interval, the maximum output current of the charging pile, the charging current of the SOC and the temperature corresponding to the charging map and the working current of the vehicle-mounted heating module;
judging whether the accumulated target state of charge is smaller than the target state of charge according to the accumulated target state of charge change:
then, the charging remaining time in the first charging while heating mode is determined according to the formula (6):
T heating while charging 1 ＝t 2 +t 3 +Δt 2 +Δt 3 (6)
Wherein, T Heating while charging 1 Charging the first charging while heating mode for the remaining time;
if not, the charging is finished, and the charging remaining time in the second charging and heating mode is determined according to the formula (7):
T heating while charging 2 ＝t 2 +Δt 2 (7)
Wherein, T Heating while charging 2 Charging the second charge while heating mode for the remaining time.
6. The method of claim 5, wherein the determining the accumulated state of charge change according to the charging time of each temperature interval, the maximum output current of the charging pile, the charging current of the SOC and the temperature corresponding to the charging map and the working current of the vehicle-mounted heating module comprises:
when the charging current of the SOC and the temperature corresponding to the charging map is larger than the maximum output current of the charging pile, determining a first accumulated state of charge change through a formula (8):
Figure FDA0003717302500000031
therein, SOC 1 Is the first cumulative state of charge change, t Temperature interval Temperature interval is charged with electricity, I Charging pile For maximum output current of the charging pile, I Heating module The working current of the vehicle-mounted heating module is represented, and the SOH is the health degree of the battery;
when the charging current of the SOC and the temperature corresponding to the charging map is less than the maximum output current of the charging pile, determining a second accumulated state of charge change through a formula (9):
Figure FDA0003717302500000041
wherein, SOC 2 Is a second cumulative state of charge change, I map Charging current of SOC and temperature corresponding to the charging map is obtained, and SOH is the battery health degree; .
7. The method of claim 6, wherein said determining a corresponding charging mode initial estimated charging remaining time and a corresponding charging mode corrected time according to said charging mode when said charging mode is a pure heating mode comprises:
the pure heating mode determines a pure heating mode initial estimated charge remaining time and a pure heating mode correction time according to equations (10) and (11):
Figure FDA0003717302500000042
Figure FDA0003717302500000043
wherein: t is t 1 Initial estimation of charge remaining time, T, for pure heating mode Preparing For preheating time, T 1 Allowing the lowest charging temperature for the power battery module, K being the temperature rise rate of the power battery module, deltat 1 For the pure heating mode correction time, K' is the actual power battery module temperature rise rate, and T is the power battery temperature.
8. The method of claim 7, wherein said determining a corresponding charging mode charge remaining time based on said initial estimated charge remaining time and a corresponding charging mode corrected time when said charging mode is a pure heating mode comprises:
determining an accumulated state of charge change while executing the charging while heating mode;
judging whether the accumulated target state of charge is smaller than the target state of charge according to the accumulated target state of charge change:
then, the first pure heating mode charge remaining time is determined according to equation (6):
T pure heating mode 1 ＝t 1 +Δt 1 +t 2 +t 3 +Δt 2 +Δt 3 (12)
Wherein, T Pure heating mode 1 Charging a first pure heating mode for a remaining time;
if not, the charging is completed, and the charging remaining time in the second pure heating mode is determined according to the formula (7):
T pure heating mode 2 ＝t 1 +Δt 1 +t 2 +Δt 2 (13)
Wherein, T Pure heating mode 2 Charging the second pure heating mode for the remaining time.
9. A charge remaining time estimating apparatus, comprising:
the mode determining module is used for acquiring the temperature of the power battery and determining a charging mode according to the temperature of the power battery;
the initial calculation module is used for determining the initial estimated charging remaining time of the corresponding charging mode and the corresponding charging mode correction time according to the charging mode;
and the final calculation module is used for determining the charging residual time of the corresponding charging mode according to the initial estimated charging residual time and the corresponding charging mode correction time.
10. A terminal, characterized in that the terminal comprises:
one or more sensors for acquiring a current ambient temperature;
one or more controllers;
a storage device for storing one or more programs,
when executed by the one or more controllers, cause the one or more controllers to implement a charge remaining time estimation method as recited in any one of claims 1-7.
CN202210747281.1A 2022-06-28 2022-06-28 Charging remaining time estimation method, device and terminal Pending CN115195521A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116872787A (en) * 2023-08-10 2023-10-13 力高(山东)新能源技术股份有限公司 Battery remaining charging time calculation method based on BMS charging mode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116872787A (en) * 2023-08-10 2023-10-13 力高(山东)新能源技术股份有限公司 Battery remaining charging time calculation method based on BMS charging mode

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