CN114498835A - Charging control system and method of rechargeable battery and vehicle - Google Patents

Charging control system and method of rechargeable battery and vehicle Download PDF

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Publication number
CN114498835A
CN114498835A CN202210095858.5A CN202210095858A CN114498835A CN 114498835 A CN114498835 A CN 114498835A CN 202210095858 A CN202210095858 A CN 202210095858A CN 114498835 A CN114498835 A CN 114498835A
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China
Prior art keywords
voltage
rechargeable battery
value
charge
voltage value
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CN202210095858.5A
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Chinese (zh)
Inventor
田中
黄锦腾
张嘉豪
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Guangdong Huitian Aerospace Technology Co Ltd
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Guangdong Huitian Aerospace Technology Co Ltd
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Priority to CN202210095858.5A priority Critical patent/CN114498835A/en
Publication of CN114498835A publication Critical patent/CN114498835A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • 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
    • B60L58/12—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]
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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

Abstract

The application discloses a charging control method and system of a rechargeable battery and a vehicle, wherein a voltage conversion device and a controller are arranged, and when the state of charge value of the rechargeable battery is larger than a first preset state of charge threshold value, the controller sends a first voltage conversion instruction to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to a first target voltage to the rechargeable battery so as to charge the rechargeable battery; the controller is further used for acquiring a voltage corresponding to the first target voltage output by the voltage converter, and sending a second voltage conversion instruction to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the second target voltage value to the rechargeable battery to charge the rechargeable battery when the voltage corresponding to the first target voltage is not greater than the first target voltage. Through adopting above-mentioned setting, guaranteed to have continuously adopted less voltage to charge to rechargeable battery when rechargeable battery is full of electricity soon to avoid the circumstances of overcharging, can also promote charge efficiency simultaneously.

Description

Charging control system and method of rechargeable battery and vehicle
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a charging control system and method for a rechargeable battery, and a vehicle.
Background
Along with the continuous improvement of living standard of people, the use frequency of batteries and the like is higher, such as the use frequency of batteries in vehicles or batteries in electric equipment is higher. Accordingly, the demand for batteries is increasing, and users desire to increase the battery capacity and shorten the charging time. The method of charging the battery becomes the key to solve this problem.
The current commonly adopted charging mode is a constant-current and constant-voltage charging mode, and the method has long constant-voltage time in the charging process and is difficult to achieve the purpose of quick charging. The purpose of quick charging can be achieved by increasing the limiting voltage of the battery during constant-current charging, but the limiting voltage of the battery is too high, and side reactions can occur in the battery; the limiting voltage is too low and the battery is difficult to fully charge.
Disclosure of Invention
In view of this, embodiments of the present application provide a charging control system and method for a rechargeable battery, and a vehicle, which can improve efficiency during charging of the battery and ensure charging safety.
In a first aspect, an embodiment of the present application provides a charging control system for a rechargeable battery, where the system includes: a voltage conversion device and a controller. The voltage conversion device is connected with the rechargeable battery and is used for converting the voltage of the input voltage and outputting the converted voltage to the rechargeable battery so as to charge the rechargeable battery; the controller is connected with the voltage conversion device and is used for sending a first voltage conversion instruction comprising a first target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the first target voltage to the rechargeable battery so as to charge the rechargeable battery when the state of charge value of the rechargeable battery is larger than a first preset state of charge threshold value, wherein the first target voltage value is obtained according to the first preset voltage value and the terminal voltage of the rechargeable battery; the controller is further configured to obtain a voltage corresponding to a first target voltage output by the voltage converter, and send a second voltage conversion instruction including a second target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the second target voltage value to the rechargeable battery to charge the rechargeable battery when the voltage corresponding to the first target voltage is not greater than the first target voltage, where the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value, and a terminal voltage of the rechargeable battery, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value.
In a second aspect, an embodiment of the present application provides a charging control method for a rechargeable battery, where the method is applied to a processor in a charging control system for the rechargeable battery, and the method includes: acquiring a state of charge value and a terminal voltage of a rechargeable battery; if the state of charge value is greater than a first preset state of charge threshold value, sending a first voltage conversion instruction comprising a first target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the first target voltage to the rechargeable battery so as to charge the rechargeable battery, wherein the first target voltage value is obtained according to a first preset voltage value and a terminal voltage of the rechargeable battery; if the voltage corresponding to the first target voltage is not greater than the first target voltage, sending a second voltage conversion instruction including a second target voltage value to the voltage conversion device, and instructing the voltage conversion device to output a voltage corresponding to the second target voltage value to the rechargeable battery so as to charge the rechargeable battery, wherein the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value and the terminal voltage of the rechargeable battery, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value.
In a third aspect, an embodiment of the present application provides a vehicle, including a vehicle body, a rechargeable battery, and the charging control system for the rechargeable battery, where the rechargeable battery is connected to a voltage conversion device and a controller in the charging control system, and the rechargeable battery and the charging control system for the rechargeable battery are respectively disposed on the vehicle body.
The embodiment of the application provides a charging control system and method of a rechargeable battery and a vehicle. The system includes a voltage conversion device and a controller. The controller is used for sending a first voltage conversion instruction comprising a first target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the first target voltage to the rechargeable battery so as to charge the rechargeable battery when the state of charge value of the rechargeable battery is larger than a first preset state of charge threshold value, wherein the first target voltage value is obtained according to a first preset voltage value and the terminal voltage of the rechargeable battery; the controller is further configured to obtain a voltage corresponding to a first target voltage output by the voltage converter, and send a second voltage conversion instruction including a second target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the second target voltage value to the rechargeable battery to charge the rechargeable battery when the voltage corresponding to the first target voltage is not greater than the first target voltage, where the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value, and a terminal voltage of the rechargeable battery, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value. By adopting the arrangement, when the rechargeable battery is charged quickly (the state of charge value of the rechargeable battery is greater than the first preset state of charge threshold value), the rechargeable battery is continuously charged by adopting smaller voltage, so that the overcharge condition is avoided, and meanwhile, the situation that the rechargeable battery cannot be charged when the charging voltage is less than the terminal voltage of the rechargeable battery in the charging process can be avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram illustrating a charging control system for a rechargeable battery according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram showing another structure of a charging control system for a rechargeable battery according to an embodiment of the present application;
fig. 3 is a schematic flow chart illustrating a charging process of a rechargeable battery by using a charging control system of the rechargeable battery according to an embodiment of the present application;
fig. 4 is a schematic flowchart illustrating a charging control method for a rechargeable battery according to an embodiment of the present disclosure;
fig. 5 shows a schematic structural diagram of a vehicle according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1, the present application provides a charging control system 100 for a rechargeable battery, and the system 100 may be applied to a vehicle, such as a battery car, an automobile, an airplane or a ship, and may also be applied to a mobile terminal or various electric devices.
The system 100 includes: a voltage conversion device 110 and a controller 120. The voltage conversion device 110 is connected to the rechargeable battery 200, and is configured to convert an input voltage and output the converted voltage to the rechargeable battery 200 to charge the rechargeable battery 200; the controller 120 is connected to the voltage conversion device 110, and configured to send a first voltage conversion instruction including a first target voltage value to the voltage conversion device 110 to instruct the voltage conversion device 110 to output a voltage corresponding to the first target voltage to the rechargeable battery 200 to charge the rechargeable battery 200 when the state of charge value of the rechargeable battery 200 is greater than a first preset state of charge threshold, where the first target voltage value is obtained according to a first preset voltage value and a terminal voltage of the rechargeable battery 200; the controller 120 is further configured to obtain a voltage corresponding to a first target voltage output by the voltage converter, and send a second voltage conversion instruction including a second target voltage value to the voltage conversion device 110 to instruct the voltage conversion device 110 to output a voltage corresponding to the second target voltage value to the rechargeable battery 200 to charge the rechargeable battery 200 when the voltage corresponding to the first target voltage is not greater than the first target voltage, where the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value, and a terminal voltage of the rechargeable battery 200, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value.
Specifically, the voltage conversion device 110 may be a voltage converter capable of adjusting voltage, and specifically, the voltage conversion device 110 may output a voltage corresponding to a target voltage in a voltage conversion command of the controller 120 under the action of the controller 120. Such as outputting a voltage corresponding to a first target voltage or outputting a voltage corresponding to a second target voltage.
It should be understood that the specific structure and model of the voltage conversion device 110 may be any, as long as the output of the voltage corresponding to the target voltage under the action of the controller 120 can be performed, and is not particularly limited in the present embodiment.
The voltage input by the voltage conversion device 110 may be input by a commercial power, or may be input by a power battery or any storage battery, which is not specifically limited herein and may be selected according to actual requirements.
Referring to fig. 2, in an embodiment of the present application, the system 100 further includes a high voltage power supply device 130, where the high voltage power supply device 130 is connected to the voltage converting device 110 and is used for supplying high voltage power to the voltage converting device 110;
the voltage conversion device 110 is further configured to perform voltage conversion on the high voltage based on a first target voltage and output a voltage corresponding to the first target voltage, or perform voltage conversion on the high voltage based on a second target voltage and output a voltage corresponding to the second target voltage.
Accordingly, if the system 100 further includes a high voltage power supply device 130, the voltage conversion device 110 further performs voltage conversion according to the voltage provided by the high voltage power supply device 130 and a target voltage (a first target voltage or a second target voltage). Accordingly, the system 100 may further include a voltage detection device for detecting the high voltage power supply 130, or a battery management system in the high voltage power supply 130.
In an implementation manner of the present application, the high voltage power supply device 130 includes a power battery pack and a power battery management system, the power battery pack is used for providing high voltage power, the power battery management system and the power battery are connected with the controller 120 respectively, the power battery management system is used for detecting the voltage value of the high voltage power provided by the power battery pack and sending the voltage value to the controller 120, the controller 120 is further used for obtaining a first voltage conversion command according to the voltage value of the high voltage power and the first target voltage value, or obtaining a second voltage conversion command according to the voltage value of the high voltage power and the second target voltage value.
It should be understood that the high voltage power supply device 130 may supply voltage to a load (electric device) in addition to the rechargeable battery 200 to operate normally using the electric device.
The controller 120 may be implemented in at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The controller 120 may integrate one or a combination of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing display content; the modem is used to handle wireless communications. It is to be understood that the modem may be implemented by a communication chip without being integrated into the processor.
For example, if the charging control system of the rechargeable battery is applied to a vehicle, the controller 120 may be a processor provided in a central control device in the vehicle, or may be a processor provided independently, and is not limited in particular here, and may be set according to actual requirements.
The first preset state of charge threshold may be 92%, 95%, 97%, etc., and may be set according to actual requirements.
The controller 120 may be connected to the voltage conversion device 110 and the high voltage power supply device 130 in a wired manner, or in a wireless communication manner, and may be selected according to actual requirements.
In an embodiment, the controller 120, the voltage conversion device 110 and the high voltage power supply device 130 may be connected by a communication bus.
The controller 120 may obtain a target voltage (a first target voltage or a second target voltage) in real time to control the voltage conversion device 110 to output a voltage value corresponding to the target voltage according to the target voltage obtained in real time. The target voltage may also be obtained every preset time interval to control the voltage conversion device 110 to output the voltage value corresponding to the target voltage according to the obtained target voltage, where the preset time interval may be 1 second, 2 seconds, 5 seconds, or the like, and is not limited herein.
The terminal voltage of the rechargeable battery 200 specifically refers to a voltage between the positive and negative poles of the rechargeable battery 200, which can be detected by a battery management system of the rechargeable battery 200, or detected by an external battery detection device or device, and is not specifically limited herein, and may be set according to actual requirements.
In an embodiment of the present application, the system 100 further includes a battery detection device 140 connected to the controller 120 for detecting the terminal voltage and the state of charge value of the rechargeable battery 200.
The battery detection device 140 may be a device integrated with a battery management system.
The rechargeable battery 200 may be a lithium battery, a nickel-cadmium battery, a nickel-hydrogen battery, or the like.
In an embodiment of the present application, the rechargeable battery 200 is a lithium battery.
The lithium battery may be a battery using a nonaqueous electrolyte solution, in which lithium metal or a lithium alloy is used as a positive/negative electrode material. The lithium metal or lithium alloy can also be used as a positive/negative electrode material, and the polymer can be used as an electrolyte to make batteries with various shapes, which is not specifically limited herein, and can be selected or arranged according to actual requirements.
The first target voltage value may be obtained according to the first preset voltage value and the terminal voltage of the rechargeable battery 200 by accumulating the first preset voltage value and the terminal voltage of the rechargeable battery to obtain the first target voltage value.
The first preset voltage value may be specifically 0.1V, 0.2V, or 0.15V, and the like, and is not specifically limited again, and may be set according to actual requirements.
The manner of obtaining the second target voltage value according to the second preset voltage value, the first preset voltage value and the terminal voltage of the rechargeable battery 200 may be: and accumulating the second preset voltage value, the first preset voltage value and the terminal voltage of the rechargeable battery 200 to obtain the second target voltage value.
The second preset voltage value may be 0.05V, 0.07V, 0.1V, etc., as long as it is smaller than the first preset voltage value.
Since the accuracy of the voltage converter capable of adjusting the voltage is usually 0.2V, 0.1V, 0.05V, or the like, there may be a case where the actual voltage output by the voltage conversion device 110 does not coincide with the target voltage, that is, when the voltage conversion device 110 outputs a voltage corresponding to the target voltage, the output voltage does not coincide with the target voltage. There may be a case where the output voltage is greater than the target voltage, and there may also be a case where the output voltage is less than the target voltage.
For example, if the accuracy of the voltage converter for adjustable voltage is 0.1V and the first preset voltage value is 0.1V, when the controller 120 controls the voltage converter for adjustable voltage to perform voltage conversion after obtaining the first target voltage according to the first preset voltage value and the terminal voltage, the range of the voltage value corresponding to the first target voltage obtained by conversion should be between [ terminal voltage, terminal voltage +0.2V ], and if the voltage value corresponding to the first target voltage is not greater than the terminal voltage, a situation that the rechargeable battery 200 cannot be charged may be caused, therefore, the controller 120 adds a second preset voltage value (e.g. 0.05V) to the first target voltage to obtain a second target voltage when the voltage value corresponding to the first target voltage is not greater than the terminal voltage, and when performing voltage conversion by the voltage converter for adjustable voltage after obtaining the second target voltage, the range of the voltage value corresponding to the first target voltage obtained by conversion should be [ terminal voltage +0.05, terminal voltage +0.25V ], it can be ensured that the charging voltage is always greater than the terminal voltage of the rechargeable battery 200, i.e., the rechargeable battery 200 can be charged.
This application is through adopting rechargeable battery's charge control system 100, and voltage conversion device 110 in system 100 is connected with rechargeable battery 200, controller 120 with voltage conversion device 110 is connected, be used for when rechargeable battery 200's state of charge value is greater than first predetermined state of charge threshold, to voltage conversion device 110 sends the first voltage conversion instruction including first target voltage value and instructs voltage conversion device 110 to rechargeable battery 200 outputs the voltage that corresponds with this first target voltage in order to charge this rechargeable battery 200, wherein, first target voltage value according to first predetermined voltage value with rechargeable battery 200's terminal voltage obtains, controller 120 still is used for and when the voltage that first target voltage corresponds is not more than when first target voltage, to voltage conversion device 110 sends the second voltage conversion instruction including second target voltage value and instructs voltage conversion device 110 to rechargeable battery 200 output with the second target voltage value And marking a voltage corresponding to the voltage value to charge the rechargeable battery 200, wherein the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value and the terminal voltage of the rechargeable battery 200, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value. Therefore, when the rechargeable battery 200 is charged fully (the state of charge value of the rechargeable battery 200 is greater than the first preset state of charge threshold), the rechargeable battery 200 is continuously charged with a smaller voltage, so as to avoid the overcharge condition, and meanwhile, the situation that the rechargeable battery cannot be charged when the charging voltage is less than the terminal voltage of the rechargeable battery 200 in the charging process can be avoided.
In order to improve the charging efficiency when the rechargeable battery 200 is charged, in this application, the controller 120 is further configured to output and send a third voltage conversion instruction including a third target voltage value to the voltage conversion device 110 when the state of charge value is greater than a second preset state of charge threshold and is less than or equal to the first preset state of charge threshold, the voltage conversion device 110 outputs a voltage corresponding to the third target voltage to the rechargeable battery 200 to charge the rechargeable battery 200, wherein the third target voltage value is obtained according to a third preset voltage value and a terminal voltage of the rechargeable battery 200, and the third preset voltage value is greater than the first preset voltage value.
The second state of charge threshold may be 75%, 78%, 80%, 82%, or 85%, etc., and may be set according to actual requirements.
The second preset voltage value may be 0.25V, 0.3V, or 0.4V, and the like, and may be set according to actual requirements.
The third target voltage value may be obtained according to the third preset voltage value and the terminal voltage of the rechargeable battery 200 by accumulating the third preset voltage value and the terminal voltage of the rechargeable battery to obtain the third target voltage value.
By adopting the above arrangement, when the state of charge value of the rechargeable battery 200 is greater than the second state of charge threshold value and smaller than the first state of charge threshold value, the rechargeable battery can be charged with a higher voltage, thereby improving the charging efficiency.
In another embodiment of the present application, the controller 120 is further configured to, when the state of charge value is less than or equal to the second preset state of charge threshold value, output a fourth voltage conversion instruction including a fourth target voltage value to the voltage conversion device 110, where the fourth target voltage value is obtained according to a fourth preset voltage value and a terminal voltage of the rechargeable battery 200, and instruct the voltage conversion device 110 to output a voltage corresponding to the fourth target voltage to the rechargeable battery 200 to charge the rechargeable battery 200.
The third preset voltage value may be 0.5V, 0.6V, or 0.8V, and the like, and may be set according to actual requirements. Through adopting the above-mentioned setting of this application, when rechargeable battery 200 electric quantity is low (the state of charge value is less than the second and predetermines the state of charge threshold value), adopt high voltage mode (fourth target voltage) to charge in order to realize quick charge to further improve charge efficiency.
By adopting the above arrangement of the present application, in the charging process, in the first stage, when the state of charge value of the battery is lower than the second preset state of charge threshold value, high voltage charging (fourth target voltage) is adopted to realize rapid charging, when the voltage is between the first preset state of charge threshold value and the second state of charge threshold value, higher voltage (third target voltage) is adopted to charge so as to adopt faster speed to charge, when the state of charge value is higher than the first preset state of charge threshold value, the first target voltage or the second target voltage is adopted to charge so as to ensure that the rechargeable battery 200 is not overcharged while the rechargeable battery 200 is charged, thereby improving charging efficiency.
Referring to fig. 3, for example, taking the first state of charge threshold as 95%, the second state of charge threshold as 80%, the first preset voltage value as 0.1V, the second preset voltage value as 0.05V, the third preset voltage as 0.3V, and the fourth preset voltage as 0.5V as an example, when the charging control system 100 is powered on, the high-voltage power supply device 130 starts to operate, and the high-voltage power supply voltage conversion device 110 may perform voltage conversion to supply power to the electric equipment and charge the rechargeable battery 200, and specifically when the rechargeable battery 200 is charged, the following steps may be performed:
step S11: the battery management system of the rechargeable battery 200 detects a state of charge value (SOC, i.e., amount of charge) and a terminal voltage of the rechargeable battery 200. If the SOC value is lower than 80%, the battery management system of the rechargeable battery 200 is activatedThe system detects that the terminal voltage of the battery is U20Then, step S12 is executed: the battery management system of the rechargeable battery 200 issues a charging request to the controller 120 with a request voltage of U21Wherein U is21＝U20+△U21I.e. the fourth predetermined voltage is DeltaU210.5V; step S13: the controller 120 sends the output signal including the fourth target voltage value (voltage U) to the voltage conversion device 11021) To start the constant voltage U to the secondary battery 20021And (6) charging. In step S14, when the state of charge of the rechargeable battery 200 reaches the second predetermined state of charge threshold, the internal battery management system of the rechargeable battery 200 sends a charging request to the controller 120, and the request voltage is U11(U11＝U10+△U11) Wherein the third predetermined voltage DeltaU110.3V, step S15: the controller 120 sends a third target voltage value (voltage U) to the voltage conversion device 11011) Instructs the voltage conversion device 110 to follow a constant voltage U11Charging the rechargeable battery 200; step S16: if the charging state is higher than 95% SOC, the battery detection module of the rechargeable battery 200 detects the terminal voltage U30The battery management system sends a charging request to the controller 120, and the requested voltage is U31(U31＝U30+△U31) First predetermined voltage value DeltaU310.1V; step S17: the controller 120 sends an output signal including a first target voltage value (voltage U) to the voltage conversion device 11031) To output a voltage U to the rechargeable battery 20032. Since the voltage converter voltage accuracy is 0.1V, step S18: if the actual output voltage U of the voltage converter32＞U30According to voltage U32Charging is carried out; step S19: if the actual output voltage U of the voltage converter32≤U30Then the battery management system sends a charging request to the controller 120 requesting the voltage U33(U33＝U30+△U31+0.05). Step S20: the controller 120 sends the output signal including the second target voltage value (electricity) to the voltage conversion device 110Press U11) To output a voltage U to the rechargeable battery 20033Charging to terminal voltage of U33. The low-voltage battery adopts 0.1V step voltage (compensating 0.05V if necessary) to carry out constant-voltage charging until the low-voltage battery is fully charged, and then the charging is stopped.
Referring to fig. 4, the present application further provides a charging control method for a rechargeable battery, which can be applied to the controller 120 in the charging control system 100 for a rechargeable battery as described above, and the method includes:
step S110: the state of charge value and the terminal voltage of the rechargeable battery 200 are acquired.
Step S120: if the soc value is greater than the first predetermined soc threshold, a first voltage conversion command including a first target voltage value is sent to the voltage conversion device 110 to instruct the voltage conversion device 110 to output a voltage corresponding to the first target voltage to the rechargeable battery 200 to charge the rechargeable battery 200.
Wherein the first target voltage value is obtained from a first preset voltage value and a terminal voltage of the rechargeable battery 200.
Step S130: if the voltage corresponding to the first target voltage is not greater than the first target voltage, a second voltage conversion command including a second target voltage value is sent to the voltage conversion device 110, and the voltage conversion device 110 is instructed to output a voltage corresponding to the second target voltage value to the rechargeable battery 200 to charge the rechargeable battery 200.
The second target voltage value is obtained according to a second preset voltage value, the first preset voltage value and the terminal voltage of the rechargeable battery 200, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value.
It should be appreciated that after executing step S110, the controller 120 may also compare the state of charge value with the first preset state of charge threshold and the second preset state of charge threshold. If the current state of charge is greater than the first preset state of charge threshold, the step S120 is executed.
In one possible embodiment, if the state of charge value is greater than a second predetermined state of charge threshold and less than or equal to the first predetermined state of charge threshold, the method further includes:
and outputting a third voltage conversion instruction including a third target voltage value to the voltage conversion device 110, instructing the voltage conversion device 110 to output a voltage corresponding to the third target voltage to the rechargeable battery 200 to charge the rechargeable battery 200, wherein the third target voltage value is obtained according to a third preset voltage value and the terminal voltage of the rechargeable battery 200, and the third preset voltage value is greater than the first preset voltage value.
Further, in an embodiment, if the state of charge value is less than or equal to the second preset state of charge threshold, the method further includes: and outputting a fourth voltage conversion instruction including a fourth target voltage value to the voltage conversion device 110, instructing the voltage conversion device 110 to output a voltage corresponding to the fourth target voltage to the rechargeable battery 200 to charge the rechargeable battery 200, wherein the fourth target voltage value is obtained according to a fourth preset voltage value and the terminal voltage of the rechargeable battery 200, and the fourth preset voltage value is greater than the third preset voltage value.
For the above detailed description of steps S110 to S130, reference may be made to the foregoing detailed description of the charging control system 100 for a rechargeable battery, and details are not repeated in this example.
A vehicle provided by the present application will be described with reference to fig. 5.
Referring to fig. 5, based on the charging control system 100 for the rechargeable battery provided in the above embodiment, the embodiment of the present application further provides a vehicle capable of operating the charging control system 100 for the rechargeable battery, and the vehicle may be an automobile, a ship, or an airplane. The vehicle may be an automobile.
The vehicle may include a vehicle body and a charging control system 100 of a rechargeable battery as shown in fig. 1.
It should be understood that the vehicle body may be provided with a center control device, a memory, and a combined navigation system, etc. And the central control equipment is respectively connected with the memory and the integrated navigation system. The memory stores therein a program (a program corresponding to the charging control method of the rechargeable battery) that can execute the contents of the foregoing embodiments, and the controller 120 can execute the program stored in the memory.
The controller 120 may include one or more cores for processing data and a message matrix unit, among other things. The controller 120 interfaces with various components throughout the electronic device using various interfaces and lines to perform various functions of the vehicle and to process data by executing or executing instructions, programs, code sets, or instruction sets stored in memory, and invoking data stored in memory.
The vehicle may further include a high voltage power supply device 130 and a rechargeable battery 200, and for the description of this portion, reference may be made to the detailed description of the foregoing embodiments, which is not repeated herein.
The integrated navigation system is a navigation system which combines navigation devices with different characteristics by using computer and data processing technology.
The Memory may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). The memory may be used to store an instruction, a program, code, a set of codes, or a set of instructions. The memory may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function, and the like. The stored data area may also store data acquired by the vehicle during use.
The vehicle may further include a network module, which is configured to receive and transmit electromagnetic waves, and to perform interconversion between the electromagnetic waves and the electrical signals, so as to communicate with a communication network or other devices, such as an audio player. The network module may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and so forth. The network module may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices via a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network.
In summary, according to the charging control system 100, method and vehicle for a rechargeable battery provided by the present application, a voltage conversion device 110 and a controller 120 are provided, and the controller 120 is configured to send a first voltage conversion instruction including a first target voltage value to the voltage conversion device 110 when a state of charge value of the rechargeable battery 200 is greater than a first preset state of charge threshold, so as to instruct the voltage conversion device 110 to output a voltage corresponding to the first target voltage to the rechargeable battery 200 to charge the rechargeable battery 200, where the first target voltage value is obtained according to a first preset voltage value and a terminal voltage of the rechargeable battery 200; the controller 120 is further configured to obtain a voltage corresponding to a first target voltage output by the voltage converter, and send a second voltage conversion instruction including a second target voltage value to the voltage conversion device 110 to instruct the voltage conversion device 110 to output a voltage corresponding to the second target voltage value to the rechargeable battery 200 to charge the rechargeable battery 200 when the voltage corresponding to the first target voltage is not greater than the first target voltage, where the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value, and a terminal voltage of the rechargeable battery 200, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value. By adopting the above arrangement, it is ensured that when the rechargeable battery 200 is charged to full charge (the state of charge value of the rechargeable battery 200 is greater than the first preset state of charge threshold value), the rechargeable battery 200 is continuously charged with a smaller voltage, so as to avoid the situation of overcharge, and meanwhile, the situation that charging cannot be performed when the charging voltage is less than the terminal voltage of the rechargeable battery 200 in the charging process can be avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A charge control system for a rechargeable battery, comprising:
the voltage conversion device is connected with the rechargeable battery and is used for converting the voltage of the input voltage and outputting the converted voltage to the rechargeable battery so as to charge the rechargeable battery;
the controller is connected with the voltage conversion device and used for sending a first voltage conversion instruction comprising a first target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the first target voltage to the rechargeable battery so as to charge the rechargeable battery when the state of charge value of the rechargeable battery is greater than a first preset state of charge threshold value, wherein the first target voltage value is obtained according to the first preset voltage value and the terminal voltage of the rechargeable battery;
the controller is further configured to obtain a voltage corresponding to a first target voltage output by the voltage converter, and send a second voltage conversion instruction including a second target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the second target voltage value to the rechargeable battery to charge the rechargeable battery when the voltage corresponding to the first target voltage is not greater than the first target voltage, where the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value, and a terminal voltage of the rechargeable battery, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value.
2. The system of claim 1, wherein the controller is further configured to send a third voltage conversion command including a third target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the third target voltage to the rechargeable battery for charging the rechargeable battery when the state of charge value is greater than a second preset state of charge threshold and less than or equal to the first preset state of charge threshold, wherein the third target voltage value is obtained according to a third preset voltage value and a terminal voltage of the rechargeable battery, and the third preset voltage value is greater than the first preset voltage value.
3. The system of claim 2, wherein the controller is further configured to send a fourth voltage conversion command including a fourth target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the fourth target voltage to the rechargeable battery to charge the rechargeable battery when the state of charge value is less than or equal to the second preset state of charge threshold, wherein the fourth target voltage value is obtained according to a fourth preset voltage value and a terminal voltage of the rechargeable battery, and the fourth preset voltage value is greater than the third preset voltage value.
4. The charging control system for the rechargeable battery according to any one of claims 1 to 3, further comprising a high voltage power supply device connected to the voltage conversion device for supplying a high voltage power to the voltage conversion device;
the voltage conversion device is further configured to perform voltage conversion on the high voltage based on a first target voltage and output a voltage corresponding to the first target voltage, or perform voltage conversion on the high voltage based on a second target voltage and output a voltage corresponding to the second target voltage.
5. The charging control system for the rechargeable battery according to claim 4, wherein the high voltage power supply device comprises a power battery pack and a power battery management system, the power battery pack is used for providing high voltage power, the power battery management system is connected with the power battery and the controller respectively, the power battery management system is used for detecting a voltage value of the high voltage power provided by the power battery pack and sending the voltage value to the controller, and the controller is further used for obtaining a first voltage conversion command according to the voltage value of the high voltage power and the first target voltage value, or obtaining a second voltage conversion command according to the voltage value of the high voltage power and the second target voltage value.
6. The system of any one of claims 1-3, further comprising battery detection means, coupled to said controller, for detecting terminal voltage and state-of-charge values of the rechargeable battery.
7. A charging control method for a rechargeable battery, the method being applied to a controller in a charging control system for a rechargeable battery according to any one of claims 1 to 6, the method comprising:
acquiring a state of charge value and a terminal voltage of a rechargeable battery;
if the state of charge value is greater than a first preset state of charge threshold value, sending a first voltage conversion instruction comprising a first target voltage value to the voltage conversion device to instruct the voltage conversion device to output a voltage corresponding to the first target voltage to the rechargeable battery so as to charge the rechargeable battery, wherein the first target voltage value is obtained according to a first preset voltage value and a terminal voltage of the rechargeable battery;
if the voltage corresponding to the first target voltage is not greater than the first target voltage, sending a second voltage conversion instruction including a second target voltage value to the voltage conversion device, and instructing the voltage conversion device to output a voltage corresponding to the second target voltage value to the rechargeable battery so as to charge the rechargeable battery, wherein the second target voltage value is obtained according to a second preset voltage value, the first preset voltage value and the terminal voltage of the rechargeable battery, the second target voltage value is greater than the first target voltage value, and the first preset voltage value is greater than the second preset voltage value.
8. The charging control method of a secondary battery according to claim 7, characterized by further comprising:
and if the state of charge value is larger than a second preset state of charge threshold and smaller than or equal to the first preset state of charge threshold, outputting and sending a third voltage conversion instruction comprising a third target voltage value to the voltage conversion device, and instructing the voltage conversion device to output a voltage corresponding to the third target voltage to the rechargeable battery so as to charge the rechargeable battery, wherein the third target voltage value is obtained according to a third preset voltage value and the terminal voltage of the rechargeable battery, and the third preset voltage value is larger than the first preset voltage value.
9. The charging control method for a secondary battery according to claim 8, characterized in that the method further comprises:
and if the state of charge value is smaller than or equal to the second preset state of charge threshold value, outputting and sending a fourth voltage conversion instruction including a fourth target voltage value to the voltage conversion device, and instructing the voltage conversion device to output a voltage corresponding to the fourth target voltage to the rechargeable battery so as to charge the rechargeable battery, wherein the fourth target voltage value is obtained according to a fourth preset voltage value and the terminal voltage of the rechargeable battery, and the fourth preset voltage value is larger than the third preset voltage value.
10. A vehicle characterized by comprising a vehicle body, a rechargeable battery, and a charge control system for the rechargeable battery according to any one of claims 1 to 6, wherein the rechargeable battery is connected to a voltage conversion device and a controller in the charge control system, respectively, and the rechargeable battery and the charge control system for the rechargeable battery are provided to the vehicle body, respectively.
CN202210095858.5A 2022-01-26 2022-01-26 Charging control system and method of rechargeable battery and vehicle Pending CN114498835A (en)

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Application Number Priority Date Filing Date Title
CN202210095858.5A CN114498835A (en) 2022-01-26 2022-01-26 Charging control system and method of rechargeable battery and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210095858.5A CN114498835A (en) 2022-01-26 2022-01-26 Charging control system and method of rechargeable battery and vehicle

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