CN115139829B - Charging heating control method and device, electronic equipment and storage medium - Google Patents

Charging heating control method and device, electronic equipment and storage medium Download PDF

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Publication number
CN115139829B
CN115139829B CN202210902386.XA CN202210902386A CN115139829B CN 115139829 B CN115139829 B CN 115139829B CN 202210902386 A CN202210902386 A CN 202210902386A CN 115139829 B CN115139829 B CN 115139829B
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China
Prior art keywords
heating
current value
battery
value
current
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CN202210902386.XA
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CN115139829A (en
Inventor
张佳骥
吴学强
时艳茹
夏萍
薛振杰
姚蒙蒙
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Weichai Power Co Ltd
Weifang Weichai Power Technology Co Ltd
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Weichai Power Co Ltd
Weifang Weichai Power Technology Co Ltd
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Priority to CN202210902386.XA priority Critical patent/CN115139829B/en
Publication of CN115139829A publication Critical patent/CN115139829A/en
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Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The application provides a charging heating control method and device, electronic equipment and a storage medium, and relates to the technical field of batteries. In a heating mode, a heating component is controlled to heat a battery by referring to a heating current value, the current value of the battery acquired by a current sensor is acquired in real time, if the absolute value of the current value is larger than the accuracy of the current sensor, a heating current step length is determined according to the current value and the accuracy of the current sensor, a target heating current value is determined according to the heating current step length and the reference heating current value, the heating component is controlled to heat the battery by referring to the target heating current value, and if the absolute value of the current value is not larger than the accuracy of the current sensor, the heating component is controlled to heat the battery by referring to the heating current value. Because the heating current value of the heating component can be controlled in the process of charging the battery, the heating component can output the maximum power in real time, the heating speed is improved, and the heating efficiency and the charging efficiency can be improved.

Description

Charging heating control method and device, electronic equipment and storage medium
Technical Field
The present application relates to the field of battery technologies, and in particular, to a charging and heating control method, a device, an electronic apparatus, and a storage medium.
Background
The electric automobile can produce the damage to the battery when charging at low temperature, causes irreversible harm to the battery, therefore, generally carries out heat production and temperature rise through the battery external connection heating assembly.
At present, in the process of heating the battery through the heating component, constant heating current is generally adopted to heat the battery, however, as the internal resistance of the heating component changes along with the temperature in the working process, the heating component cannot provide the maximum heating power in real time, so that the heating efficiency and the charging efficiency of the battery are low.
Disclosure of Invention
In order to solve the existing technical problems, the embodiment of the application provides a charging and heating control method, a charging and heating control device, electronic equipment and a storage medium, which can improve the heating efficiency and the charging efficiency of a battery.
In order to achieve the above object, the technical solution of the embodiment of the present application is as follows:
in a first aspect, an embodiment of the present application provides a charging heating control method, including:
in the heating mode, controlling the heating assembly to heat the battery with reference to the heating current value;
acquiring a current value of the battery acquired by a current sensor, if the absolute value of the current value is larger than the accuracy of the current sensor, determining a heating current step length according to the current value and the accuracy of the current sensor, determining a target heating current value according to the heating current step length and the reference heating current value, and controlling the heating assembly to heat the battery at the target heating current value;
And if the absolute value of the current value is not greater than the accuracy of the current sensor, controlling the heating component to heat the battery at the reference heating current value.
According to the charging heating control method provided by the embodiment of the application, in a heating mode, the heating component is controlled to heat the battery by referring to the heating current value, the current value of the battery collected by the current sensor is obtained in real time, if the absolute value of the current value is larger than the accuracy of the current sensor, the heating current step length is determined according to the current value and the accuracy of the current sensor, the target heating current value is determined according to the heating current step length and the reference heating current value, the heating component is controlled to heat the battery by referring to the target heating current value, and if the absolute value of the current value is not larger than the accuracy of the current sensor, the heating component is controlled to heat the battery by referring to the heating current value. Because the heating current value of the heating component can be controlled in the process of charging the battery, the heating component can output the maximum power in real time, and the heating speed is improved, so that the heating efficiency and the charging efficiency of charging the battery can be improved.
In an alternative embodiment, the reference heating current value is a first heating current value determined according to a voltage value of the battery and an internal resistance maximum value of the heating assembly, or is a historical heating current value determined according to an absolute value of the current value at a previous time.
In this embodiment, the reference heating current value for heating the battery may be the first heating current value determined based on the voltage value of the battery and the maximum internal resistance value of the heating element, or may be a historical heating current value determined based on the absolute value of the current value at the previous time. Therefore, the heating current value of the heating component can be controlled, the heating component can output the maximum power in real time, and the heating efficiency is improved.
In an alternative embodiment, said determining a target heating current value from said heating current step and said reference heating current value comprises:
if the current sensor collects the discharge current value of the battery, determining a target heating current value according to the sum of the reference heating current value and the heating current step length; or (b)
And if the current sensor collects the charging current value of the battery, determining a target heating current value according to the difference between the reference heating current value and the heating current step.
In this embodiment, if the current sensor collects a discharge current value of the battery, a target heating current value is determined according to a sum of the reference heating current value and a heating current step, and if the current sensor collects a charge current value of the battery, a target heating current value is determined according to a difference between the reference heating current value and the heating current step. Therefore, the heating current value for heating the battery can be determined according to whether the battery is in a charging state or a discharging state, real-time control of the heating current value is realized, and the heating efficiency and the charging efficiency for charging the battery are improved.
In an alternative embodiment, the method further comprises:
if the current sensor collects a discharge current value of the battery and the determined target heating current value is larger than a first limit heating current value, controlling the heating assembly to heat the battery at the first limit heating current value; the first limit heating current value is determined according to a voltage value of the battery and an internal resistance minimum value of the heating assembly; or (b)
If the current sensor collects a charging current value of the battery and the determined target heating current value is smaller than a second limit heating current value, controlling the heating assembly to heat the battery at the second limit heating current value; the second limit heating current value is zero.
In the embodiment, if the current sensor collects a discharge current value of the battery and the determined target heating current value is larger than a first limit heating current value, the heating component is controlled to heat the battery at the first limit heating current value, wherein the first limit heating current value is determined according to a voltage value of the battery and a minimum internal resistance value of the heating component; if the current sensor collects a charging current value of the battery and the determined target heating current value is smaller than a second limit heating current value, the heating component is controlled to heat the battery by the second limit heating current value, wherein the second limit heating current value is zero. Therefore, the heating current value of the heating component can be reasonably controlled, so that the heating component can output the maximum power in real time, and the heating efficiency is improved.
In an alternative embodiment, the method further comprises:
In a charging mode while heating, controlling the heating assembly to heat the battery at a second heating current value; the second heating current value is determined from a voltage value of the battery and an internal resistance representative value of the heating assembly.
In this embodiment, in the charge-while-heating mode, the heating assembly is controlled to heat the battery at a second heating current value, wherein the second heating current value is determined based on the voltage value of the battery and the internal resistance representative value of the heating assembly. Therefore, the control of the heating current value of the heating assembly can be realized, so that the heating assembly can be controlled to heat the battery at the heating current value capable of providing the maximum heating power, and the heating efficiency and the heating speed for charging the battery are improved.
In a second aspect, an embodiment of the present application further provides a charging heating control device, including:
The first heating control module is used for controlling the heating assembly to heat the battery by referring to the heating current value in a heating mode;
the second heating control module is used for acquiring the current value of the battery acquired by the current sensor, determining a heating current step length according to the current value and the current sensor precision if the absolute value of the current value is larger than the current sensor precision, determining a target heating current value according to the heating current step length and the reference heating current value, and controlling the heating assembly to heat the battery at the target heating current value;
And the third heating control module is used for controlling the heating component to heat the battery at the reference heating current value if the absolute value of the current value is not greater than the accuracy of the current sensor.
In an alternative embodiment, the reference heating current value is a first heating current value determined according to a voltage value of the battery and an internal resistance maximum value of the heating assembly, or is a historical heating current value determined according to an absolute value of the current value at a previous time.
In an alternative embodiment, the second heating control module is specifically configured to:
if the current sensor collects the discharge current value of the battery, determining a target heating current value according to the sum of the reference heating current value and the heating current step length; or (b)
And if the current sensor collects the charging current value of the battery, determining a target heating current value according to the difference between the reference heating current value and the heating current step.
In an alternative embodiment, the apparatus further comprises a limit heating control module for:
if the current sensor collects a discharge current value of the battery and the determined target heating current value is larger than a first limit heating current value, controlling the heating assembly to heat the battery at the first limit heating current value; the first limit heating current value is determined according to a voltage value of the battery and an internal resistance minimum value of the heating assembly; or (b)
If the current sensor collects a charging current value of the battery and the determined target heating current value is smaller than a second limit heating current value, controlling the heating assembly to heat the battery at the second limit heating current value; the second limit heating current value is zero.
In an alternative embodiment, the apparatus further comprises a fourth heating control module for:
In a charging mode while heating, controlling the heating assembly to heat the battery at a second heating current value; the second heating current value is determined from a voltage value of the battery and an internal resistance representative value of the heating assembly.
In a third aspect, an embodiment of the present application further provides a computer-readable storage medium having stored therein a computer program that, when executed by a processor, implements the charge heating control method of the first aspect.
In a fourth aspect, an embodiment of the present application further provides an electronic device, including a memory and a processor, where the memory stores a computer program that can be executed on the processor, and when the computer program is executed by the processor, causes the processor to implement the charging heating control method of the first aspect.
The technical effects caused by any implementation manner of the second aspect to the fourth aspect may refer to the technical effects caused by the corresponding implementation manner of the first aspect, and are not described herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery system according to an embodiment of the present application;
fig. 2 is a schematic diagram of communication between a BMS and a charging pile through a CAN bus according to an embodiment of the present application;
Fig. 3 is a flowchart of a charging heating control method according to an embodiment of the present application;
FIG. 4 is a flowchart of another charge heating control method according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of a charging and heating control device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another charge heating control device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that the terms "comprises" and "comprising," along with their variants, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The following describes in detail the technical solution provided by the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram schematically illustrating a battery system to which the charge heating control method according to the embodiment of the present application is applied. As shown in fig. 1, the battery system includes a battery 100, a heating assembly 200, a charging device 300, a heating relay 400, a charging relay 500, and a current sensor 600.
Wherein, the current sensor 600 is used for collecting a charging current value or a discharging current value of the battery 100; when the heating relay 400 is opened and the charging relay 500 is closed, the battery system is in a pure charging mode, and the charging device 300 charges the battery 100; when the heating relay 400 is closed and the charging relay 500 is closed, the battery system is in the heating-only mode or the charging-while-heating mode, the charging device 300 charges the battery 100, and the heating assembly 200 heats the battery 100. The charging device 300 may be a charging stake or an on-board charger.
In an alternative embodiment, the charge heating control method provided by the embodiment of the application can be applied to a Battery management system (Battery MANAGEMENT SYSTEM, BMS). Fig. 2 is a schematic diagram of communication between a BMS and a charging device (a charging pile or a vehicle-mounted charger) through a CAN bus, and as shown in fig. 2, the BMS CAN send a charging demand current of a battery to the charging device through the CAN bus, and the charging device CAN provide the charging demand current for the BMS, namely, charge the battery with the charging demand current; the BMS CAN send the charging demand voltage of the battery to the charging device through the CAN bus, and the charging device CAN provide the charging demand voltage for the BMS, namely, the charging demand voltage is used for charging the battery; the charging device may provide the BMS with an actual charging current, i.e., charge the battery with the actual charging current.
In addition, other interactive signal communication CAN also be carried out through the CAN bus between charging device and the BMS.
In some embodiments, a flowchart of a charging heating control method provided by the embodiment of the present application may be shown in fig. 3, and includes the following steps:
In step S301, in the heating mode, the heating assembly is controlled to heat the battery with reference to the heating current value.
The reference heating current value may be a first heating current value determined according to a voltage value of the battery and an internal resistance maximum value of the heating assembly, or may be a historical heating current value determined according to an absolute value of a current value at a previous time.
The maximum internal resistance value of the heating assembly may be a maximum internal resistance value of the heating assembly obtained according to a technical specification of the heating assembly.
Alternatively, the heating assembly may be a heating film.
Step S302, obtaining a current value of the battery collected by the current sensor, if the absolute value of the current value is larger than the accuracy of the current sensor, determining a heating current step according to the current value and the accuracy of the current sensor, determining a target heating current value according to the heating current step and a reference heating current value, and controlling the heating assembly to heat the battery with the target heating current value.
The current value of the battery can be acquired through the current sensor, when the current value acquired by the current sensor is a positive value, the discharge current value of the battery acquired by the current sensor can be determined, and when the current value acquired by the current sensor is a negative value, the charging current value of the battery acquired by the current sensor can be determined.
When the current sensor collects a charging current value of the battery and the absolute value of the charging current value of the battery is larger than the accuracy of the current sensor, the heating current step size can be determined according to the absolute value of the charging current value and the accuracy of the current sensor.
When the current sensor collects a discharge current value of the battery and the discharge current value of the battery is larger than the accuracy of the current sensor, the heating current step length can be determined according to the discharge current value and the accuracy of the current sensor.
The accuracy of the current sensor is the measurement error of the current sensor. For example, assuming that the measurement range of the current sensor is 0 to 200A and the accuracy is 1%, the current sensor accuracy may be 2A.
When the heating current step length is determined according to the absolute value of the charging current value and the accuracy of the current sensor, the heating current step length can be obtained by looking up a table according to the difference between the absolute value of the charging current value and the accuracy of the current sensor. That is, the heating current step corresponding to the difference between the absolute value of the charging current value and the accuracy of the current sensor is determined according to the correspondence between the preset current value and the heating current step.
When the heating current step length is determined according to the discharging current value and the accuracy of the current sensor, the heating current step length can be obtained by looking up a table according to the difference between the discharging current value and the accuracy of the current sensor. That is, the heating current step corresponding to the difference between the discharge current value and the current sensor accuracy is determined based on the correspondence between the preset current value and the heating current step.
After determining the heating current step length according to the current value of the battery collected by the current sensor and the accuracy of the current sensor, if the current sensor collects the discharging current value of the battery, determining a target heating current value according to the sum of the reference heating current value and the heating current step length; if the current sensor collects the charging current value of the battery, determining a target heating current value according to the difference between the reference heating current value and the heating current step.
After the target heating current value is determined, the heating assembly may be controlled to heat the battery at the target heating current value.
In step S303, if the absolute value of the current value is not greater than the accuracy of the current sensor, the heating component is controlled to heat the battery with reference to the heating current value.
When the current sensor collects a charging current value of the battery and the absolute value of the charging current value of the battery is not greater than the accuracy of the current sensor, the heating component can be controlled to heat the battery by referring to the heating current value.
When the current sensor collects a discharge current value of the battery and the discharge current value of the battery is not greater than the accuracy of the current sensor, the heating assembly can be controlled to heat the battery by referring to the heating current value.
Specifically, in a heating mode, a heating component is controlled to heat a battery at a certain moment by referring to a heating current value, a current value of charging or discharging of the battery is collected in real time through a current sensor, if the absolute value of the current value of charging or discharging of the battery at the current moment is larger than the accuracy of the current sensor, a heating current step length is determined according to a table look-up table of the difference between the absolute value of the current value and the accuracy of the current sensor, a target heating current value is determined according to the heating current step length and the reference heating current value, and the heating component is controlled to heat the battery at the target heating current value; and if the absolute value of the current value of the charge or discharge of the battery at the current moment is not greater than the accuracy of the current sensor, controlling the heating assembly to heat the battery by referring to the heating current value.
For example, in the heating mode, it is assumed that the current value of the battery collected by the current sensor is obtained at intervals of 1s, and at 1s, the heating component is controlled to heat the battery at the first heating current value I1, at 2s, the current sensor collects the discharge current value of the battery, and the discharge current value is greater than the current sensor precision, and according to the discharge current value and the current sensor precision of 2s, the heating current step d1 of 2s is determined, and the first heating current value I1 and the heating current step d1 are added to obtain the target heating current value Ih1 of 2s, i.e., ih1=i1+d1.
When the current sensor is at the 3 rd s, the discharge current value of the battery is acquired by the current sensor, the discharge current value is larger than the current sensor precision, the heating current step d2 of the 3 rd s is determined according to the discharge current value of the 3 rd s and the current sensor precision, and the target heating current value Ih1 of the 2 nd s and the heating current step d2 of the 3 rd s are added to obtain the target heating current value Ih2 of the 3 rd s, namely ih2=ih1+d2.
At the 4 th s, the current sensor collects the charging current value of the battery, the absolute value of the charging current value is larger than the current sensor precision, the heating current step d3 of the 4 th s is determined according to the absolute value of the charging current value of the 4 th s and the current sensor precision, and the target heating current value Ih2 of the 3 rd s and the heating current step d3 of the 4 th s are subtracted to obtain the target heating current value Ih3 of the 4 th s, namely ih3=ih2-d 3.
And when the current sensor acquires a charging current value of the battery at the 5 th s, the absolute value of the charging current value is not larger than the accuracy of the current sensor, the target heating current value at the 5 th s is determined to be equal to the target heating current value Ih3 at the 4 th s, and the heating assembly is controlled to heat the battery at the target heating current value Ih 3.
In one embodiment, if the current sensor collects a discharge current value of the battery and the determined target heating current value is greater than the first limit heating current value, the heating component is controlled to heat the battery at the first limit heating current value. Wherein the first limit heating current value is determined according to a voltage value of the battery and an internal resistance minimum value of the heating assembly, which may be a minimum internal resistance value of the heating assembly obtained according to a technical specification of the heating assembly.
And if the current sensor collects a charging current value of the battery and the determined target heating current value is smaller than the second limit heating current value, controlling the heating assembly to heat the battery at the second limit heating current value. Wherein the second limit heating current value may be zero.
Optionally, in the charge-while-heating mode, the heating assembly is controlled to heat the battery at a second heating current value. Wherein the second heating current value is determined based on the voltage value of the battery and an internal resistance representative value of the heating assembly. The internal resistance typical value of the heating element may be an internal resistance typical value of the heating element obtained according to a technical specification of the heating element, and the internal resistance typical value of the heating element is an internal resistance value of the heating element in a normal temperature state.
Specifically, the second heating current value may be determined by the following formula:
Wherein I heat2 is a second heating current value, U pack is a voltage value of the battery, and R ty is a typical internal resistance value of the heating element.
In some embodiments, the charging heating control method proposed by the present application may also be implemented according to the procedure shown in fig. 4. As shown in fig. 4, the steps may be included as follows:
in step S401, in the heating-only mode, the heating assembly is controlled to heat the battery with reference to the heating current value.
The reference heating current value may be a first heating current value determined according to a voltage value of the battery and an internal resistance maximum value of the heating assembly, or a historical heating current value determined according to a current value of the battery acquired by a current sensor at a previous time.
When the reference heating current value is the first heating current value, the reference heating current value may be determined by the following formula:
Wherein I heat1 is a reference heating current value, U pack is a voltage value of the battery, and R max is an internal resistance maximum value of the heating element.
When the reference heating current value is the historical heating current value at the previous moment, if the absolute value of the current value at the previous moment is larger than the accuracy of the current sensor, the reference heating current value is the heating current value at the previous moment determined according to the heating current value at the previous moment and the heating current step length determined at the previous moment; if the absolute value of the current value at the previous moment is not greater than the accuracy of the current sensor, the reference heating current value is the heating current value at the moment before the previous moment.
Step S402, acquiring a current value of a battery acquired by a current sensor, and determining whether the current value is greater than 0; if not, executing step S403; if so, step S410 is performed.
Step S403, determining that the current sensor collects a charging current value of the battery.
Step S404, determining whether the absolute value of the charging current value is greater than the current sensor precision; if not, executing step S405; if so, step S406 is performed.
Step S405, the heating assembly is controlled to heat the battery with reference to the heating current value.
Step S406, determining a heating current step according to the absolute value of the charging current value and the accuracy of the current sensor.
The heating current step length can be obtained by looking up a table according to the difference between the absolute value of the charging current value and the accuracy of the current sensor.
Step S407, determining a target heating current value according to the difference between the reference heating current value and the heating current step, and controlling the heating component to heat the battery at the target heating current value.
Step S408, determining whether the target heating current value is smaller than the second limit heating current value; if not, executing step S402; if so, step S409 is performed.
In step S409, the heating module is controlled to heat the battery at the second limit heating current value.
Wherein the second limit heating current value is zero.
In step S410, it is determined that the current sensor collects a discharge current value of the battery.
Step S411, determining whether the discharge current value is greater than the current sensor accuracy; if not, executing step S405; if so, step S412 is performed.
Step S412, determining the heating current step length according to the discharging current value and the current sensor precision.
The heating current step length can be obtained by looking up a table according to the difference between the discharge current value and the accuracy of the current sensor.
Step S413, determining a target heating current value according to the sum of the reference heating current value and the heating current step, and controlling the heating assembly to heat the battery at the target heating current value.
Step S414, determining whether the target heating current value is greater than the first limit heating current value; if not, executing step S402; if so, step S415 is performed.
In step S415, the heating assembly is controlled to heat the battery at the first limit heating current value.
Wherein the first limit heating current value may be determined according to a voltage value of the battery and an internal resistance minimum value of the heating assembly. That is, the first limit heating current value may be determined by the following formula:
Wherein I lim is a first limit heating current value, U pack is a voltage value of the battery, and R min is an internal resistance minimum value of the heating element.
The charging heating control method provided by the application is described in detail below by adopting a specific embodiment:
in the heating mode, when all the discharge current values of the battery are acquired by the current sensor, the heating assembly is controlled to heat the battery at a first heating current value I1 in the initial stage. Assuming that the 1 st to 3s heating components heat the battery by a first heating current value I1, the discharging current value Iact of the 4 th battery is larger than the precision delta I of the current sensor, and the step length of the heating current is d1, the heating current value of the 4 th battery for heating is I1+d1; the discharging current value Iact of the 5s battery is larger than the accuracy delta I of the current sensor, and the heating current step length is d2, so that the heating current value for heating the 5s battery is I1+d1+d2; the discharging current value Iact of the 6 th battery is not larger than the accuracy delta I of the current sensor, and the heating current value of the 6 th battery for heating is I1+d1+d2; and if the discharging current value Iact of the 7s battery is larger than the current sensor precision delta I and the step length is d3, the heating current value for heating the 7s battery is I1+d1+d2+d3.
In the heating mode, when all the charging current values of the battery are acquired by the current sensor, the heating assembly is controlled to heat the battery at a first heating current value I1 in the initial stage. Assuming that the batteries are heated by the first heating current value I1 in the 1 st to 3s, the absolute value I act of the charging current value of the battery at the 4 th s is larger than the precision delta I of the current sensor, and the heating current step length is d1, the heating current value of the battery at the 4 th s is I1-d1; the absolute value |Iact| of the charging current value of the battery at the 5s is larger than the accuracy delta I of the current sensor, and the heating current step length is d2, so that the heating current value of the battery at the 5s for heating is I1-d1-d2; the absolute value of the charging current value of the 6s battery is not more than the precision delta I of the current sensor, and the heating current value of the 6s battery for heating is I1-d1-d2; the absolute value |Iact| of the charging current value of the 7s battery is larger than the accuracy delta I of the current sensor, and the heating current step length is d3, and the heating current value of the 7s battery for heating is I1-d1-d2-d3.
According to the charging heating control method provided by the embodiment of the application, in a heating mode, the heating component is controlled to heat the battery by referring to the heating current value, the current value of the battery collected by the current sensor is obtained in real time, if the absolute value of the current value is larger than the accuracy of the current sensor, the heating current step length is determined according to the current value and the accuracy of the current sensor, the target heating current value is determined according to the heating current step length and the reference heating current value, the heating component is controlled to heat the battery by referring to the target heating current value, and if the absolute value of the current value is not larger than the accuracy of the current sensor, the heating component is controlled to heat the battery by referring to the heating current value. The charging and discharging current value of the battery collected by the current sensor can be obtained in real time in the process of charging the battery, and whether the battery is heated or not is determined to control the heating current value according to the charging and discharging current value of the battery and the accuracy of the current sensor, so that the heating and charging processes of the battery can be reasonably controlled, the heating current value is gradually controlled, the heating assembly can output the maximum power in real time in the working process, the heating speed is improved, and the heating efficiency and the charging efficiency of charging the battery are improved.
Based on the same inventive concept as the charge heating control method shown in fig. 3, the embodiment of the application also provides a charge heating control device. Because the device is a device corresponding to the charging heating control method of the application, and the principle of the device for solving the problem is similar to that of the method, the implementation of the device can be referred to the implementation of the method, and the repetition is omitted.
Fig. 5 shows a schematic structural diagram of a charging heating control device according to an embodiment of the present application, and as shown in fig. 5, the charging heating control device includes a first heating control module 501, a second heating control module 502, and a third heating control module 503.
Wherein, the first heating control module 501 is used for controlling the heating assembly to heat the battery with reference to the heating current value in the heating mode;
The second heating control module 502 is configured to obtain a current value of the battery collected by the current sensor, determine a heating current step according to the current value and the current sensor precision if the absolute value of the current value is greater than the current sensor precision, determine a target heating current value according to the heating current step and the reference heating current value, and control the heating assembly to heat the battery with the target heating current value;
And a third heating control module 503 for controlling the heating assembly to heat the battery with reference to the heating current value if the absolute value of the current value is not greater than the accuracy of the current sensor.
In an alternative embodiment, the reference heating current value is a first heating current value determined from a voltage value of the battery and an internal resistance maximum value of the heating assembly, or is a historical heating current value determined from an absolute value of the current value at a previous time.
In an alternative embodiment, the second heating control module 502 is specifically configured to:
If the current sensor collects the discharge current value of the battery, determining a target heating current value according to the sum of the reference heating current value and the heating current step length; or (b)
If the current sensor collects the charging current value of the battery, determining a target heating current value according to the difference between the reference heating current value and the heating current step.
In an alternative embodiment, as shown in fig. 6, the apparatus may further include a heating restriction control module 601 for:
If the current sensor collects a discharge current value of the battery and the determined target heating current value is larger than the first limit heating current value, the heating component is controlled to heat the battery by the first limit heating current value; the first limit heating current value is determined according to the voltage value of the battery and the internal resistance minimum value of the heating assembly; or (b)
If the current sensor collects a charging current value of the battery and the determined target heating current value is smaller than a second limit heating current value, the heating component is controlled to heat the battery by the second limit heating current value; the second limit heating current value is zero.
In an alternative embodiment, as shown in fig. 6, the apparatus may further include a fourth heating control module 602 configured to:
in the charging mode while heating, controlling the heating assembly to heat the battery at a second heating current value; the second heating current value is determined based on the voltage value of the battery and an internal resistance representative value of the heating assembly.
The embodiment of the application also provides electronic equipment based on the same conception as the embodiment of the method. The electronic device may be a battery management system BMS for controlling a heating current of the battery during charging. In this embodiment, the structure of the electronic device may include a memory 701 and one or more processors 702 as shown in FIG. 7.
Memory 701 for storing a computer program for execution by processor 702. The memory 701 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, a program required for running an instant communication function, and the like; the storage data area can store various instant messaging information, operation instruction sets and the like.
The memory 701 may be a volatile memory (RAM), such as a random-access memory (RAM); the memory 701 may also be a non-volatile memory (non-volatile memory), such as a read-only memory, a flash memory (flash memory), a hard disk (HARD DISK DRIVE, HDD) or a Solid State Disk (SSD), or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. Memory 701 may be a combination of the above.
The processor 702 may include one or more central processing units (central processing unit, CPUs) or digital processing units, or the like. A processor 702 for implementing the above-described charge heating control method when calling the computer program stored in the memory 701.
The specific connection medium between the memory 701 and the processor 702 is not limited in the embodiments of the present application. The embodiment of the present disclosure is shown in fig. 7, where the memory 701 and the processor 702 are connected by a bus 703, where the bus 703 is shown in bold lines in fig. 7, and the connection between other components is merely illustrative, and not limiting. The bus 703 may be classified into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 7, but not only one bus or one type of bus.
According to one aspect of the present application, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions so that the computer device executes the charge heating control method in the above-described embodiment.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable 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), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application.

Claims (8)

1. A charge heating control method, characterized by comprising:
in the heating mode, controlling the heating assembly to heat the battery with reference to the heating current value;
acquiring a current value of the battery acquired by a current sensor, if the absolute value of the current value is larger than the accuracy of the current sensor, determining a heating current step length according to the current value and the accuracy of the current sensor, determining a target heating current value according to the heating current step length and the reference heating current value, and controlling the heating assembly to heat the battery at the target heating current value;
if the absolute value of the current value is not greater than the accuracy of the current sensor, controlling the heating component to heat the battery at the reference heating current value;
if the current sensor collects the discharge current value of the battery, determining a target heating current value according to the sum of the reference heating current value and the heating current step length;
if the current sensor collects the charging current value of the battery, determining a target heating current value according to the difference between the reference heating current value and the heating current step;
the measurement accuracy of the current sensor is the measurement error of the current sensor.
2. The method according to claim 1, wherein the reference heating current value is a first heating current value determined based on a voltage value of the battery and an internal resistance maximum value of the heating assembly, or is a historical heating current value determined based on an absolute value of the current value at a previous time.
3. The method according to claim 1, wherein the method further comprises:
if the current sensor collects a discharge current value of the battery and the determined target heating current value is larger than a first limit heating current value, controlling the heating assembly to heat the battery at the first limit heating current value; the first limit heating current value is determined according to a voltage value of the battery and an internal resistance minimum value of the heating assembly; or (b)
If the current sensor collects a charging current value of the battery and the determined target heating current value is smaller than a second limit heating current value, controlling the heating assembly to heat the battery at the second limit heating current value; the second limit heating current value is zero.
4. A method according to any one of claims 1 to 3, further comprising:
In a charging mode while heating, controlling the heating assembly to heat the battery at a second heating current value; the second heating current value is determined from a voltage value of the battery and an internal resistance representative value of the heating assembly.
5. A charge heating control device, characterized in that the device comprises:
The first heating control module is used for controlling the heating assembly to heat the battery by referring to the heating current value in a heating mode;
The second heating control module is used for acquiring the current value of the battery acquired by the current sensor, determining a heating current step length according to the current value and the current sensor precision if the absolute value of the current value is larger than the current sensor precision, determining a target heating current value according to the heating current step length and the reference heating current value, and controlling the heating assembly to heat the battery at the target heating current value; if the current sensor collects the discharge current value of the battery, determining a target heating current value according to the sum of the reference heating current value and the heating current step length; if the current sensor collects the charging current value of the battery, determining a target heating current value according to the difference between the reference heating current value and the heating current step;
A third heating control module for controlling the heating assembly to heat the battery with the reference heating current value if the absolute value of the current value is not greater than the accuracy of the current sensor;
the measurement accuracy of the current sensor is the measurement error of the current sensor.
6. The apparatus of claim 5, wherein the reference heating current value is a first heating current value determined based on a voltage value of the battery and an internal resistance maximum value of the heating assembly, or is a historical heating current value determined based on an absolute value of the current value at a previous time.
7. A computer-readable storage medium having a computer program stored therein, characterized in that: the computer program, when executed by a processor, implements the method of any of claims 1-4.
8. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the computer program, when executed by the processor, implementing the method of any of claims 1-4.
CN202210902386.XA 2022-07-29 2022-07-29 Charging heating control method and device, electronic equipment and storage medium Active CN115139829B (en)

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