CN114498835B - Charging control system and method of rechargeable battery and vehicle - Google Patents

Abstract

Translated fromChinese

本申请公开了一种充电电池的充电控制方法、系统及车辆，设置电压转换装置和控制器，且控制器在充电电池的荷电状态值大于第一预设荷电状态阈值时，向电压转换装置发送第一电压转换指令指示电压转换装置向充电电池输出与该第一目标电压对应的电压以对该充电电池充电；控制器还用于获取电压转换器输出的第一目标电压对应的电压，并在第一目标电压对应的电压不大于第一目标电压时，向电压转换装置发送第二电压转换指令指示电压转换装置向充电电池输出与第二目标电压值对应的电压以对该充电电池充电。通过采用上述设置，确保了在充电电池快充满电时，继续采用较小的电压对充电电池进行充电，以避免过充电的情况，同时还可以提升充电效率。

The present application discloses a charging control method, system and vehicle for a rechargeable battery, wherein a voltage conversion device and a controller are provided, and when the state of charge value of the rechargeable battery is greater 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 the first target voltage to the rechargeable battery to charge the rechargeable battery; the controller is also used to obtain a voltage corresponding to the first target voltage output by the voltage converter, and when the voltage corresponding to the first target voltage is not greater than the first target voltage, sends 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 charge the rechargeable battery. By adopting the above-mentioned setting, it is ensured that when the rechargeable battery is almost fully charged, a smaller voltage is continued to be used to charge the rechargeable battery to avoid overcharging, and the charging efficiency can also be improved.

Description

Charging control system and method of rechargeable battery and vehicle

Technical Field

The present application 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

With the continuous improvement of the living standard of people, the use frequency of batteries and the like is also higher and higher, such as the use frequency of batteries in vehicles or batteries in electric equipment. Accordingly, the demand for batteries is increasing, and it is desired for users to increase the battery capacity on the one hand and to shorten the charging time on the other hand. The method of charging the battery becomes a key to solve this problem.

The current commonly adopted charging mode is a constant-current constant-voltage charging mode, and the constant-voltage time is long in the charging process, so that the purpose of quick charging is difficult to achieve. The limiting voltage during constant-current charging of the battery is improved to achieve the aim of rapid charging, but the limiting voltage of the battery is too high, side reactions occur in the battery, the limiting voltage is too low, and the battery is difficult to fill.

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 in a charging process of the battery, and simultaneously 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 controller is connected with the voltage conversion device and is used for sending a first voltage conversion instruction which comprises 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 value to the charging battery so as to charge the charging battery when the charge state value of the charging battery is larger than a first preset charge state threshold value, wherein the first target voltage value is obtained according to the first preset voltage value and the terminal voltage of the charging battery, the controller is also used for obtaining the voltage corresponding to the first target voltage output by the voltage conversion device, and sending a second voltage conversion instruction which comprises a second target voltage value to the voltage conversion device so as to instruct the voltage conversion device to output the voltage corresponding to the second target voltage value to the charging battery so as to charge the charging battery when the charge state value of the charging battery is not larger than the first target voltage, wherein the first target voltage value is larger than the first target voltage value, the second target voltage value is obtained according to the second preset voltage value, and the second target voltage value is larger than the first target voltage value.

In a second aspect, an embodiment of the present application provides a charging control method of a rechargeable battery, where the method is applied to a processor in a charging control system of the rechargeable battery, and the method includes acquiring a state of charge value and a terminal voltage of the rechargeable battery, and if the state of charge value is greater than a first preset state of charge threshold, sending a first voltage conversion instruction including 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 charge the rechargeable battery, where the first target voltage value is obtained according to a first preset voltage value and the terminal voltage of the rechargeable battery, and 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 to instruct the voltage conversion device to output a voltage corresponding to the second target voltage value to charge the rechargeable battery, where the second target voltage value is greater than the first preset voltage value, the first target voltage value and the terminal voltage of the rechargeable battery are greater than the first preset voltage value.

In a third aspect, an embodiment of the present application provides a vehicle, including a vehicle body, a rechargeable battery, and a charging control system of the rechargeable battery, where the rechargeable battery is connected with a voltage conversion device and a controller in the charging control system, and the charging control systems of the rechargeable battery and the rechargeable battery are respectively disposed in 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 when the state of charge value of the rechargeable battery is larger than a first preset state of charge threshold value, and indicating the voltage conversion device to output a voltage corresponding to the first target voltage value to the rechargeable battery so as to charge the rechargeable battery, 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 also used for obtaining a voltage corresponding to the first target voltage output by the voltage conversion device, and sending a second voltage conversion instruction comprising a second target voltage value to the voltage conversion device when the voltage corresponding to the first target voltage is not larger than the first target voltage value, and indicating 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, and the second target voltage value is larger than the first preset voltage value. Through adopting above-mentioned setting, guaranteed when rechargeable battery is full charged soon (rechargeable battery's state of charge value is greater than first state of charge threshold value of predetermineeing), continue to adopt less voltage to charge rechargeable battery to avoid the condition of overcharging, simultaneously, can also avoid charging voltage to be less than rechargeable battery's terminal voltage in the charging process and exist the condition that can't charge.

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 being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may 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 charging control system of a rechargeable battery according to an embodiment of the present application;

Fig. 2 is a schematic diagram showing another configuration of a charging control system for a rechargeable battery according to an embodiment of the present application;

Fig. 3 is a schematic flow chart of charging 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 flow chart of a charging control method of a rechargeable battery according to an embodiment of the present application;

Fig. 5 shows a schematic structural diagram of a vehicle according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but 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.

As shown in fig. 1, the present application provides a charging control system 100 for a rechargeable battery, and the system 100 can be applied to a vehicle, such as a battery car, an automobile, an airplane, a ship, etc., and can 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 controller 120 is connected with the voltage conversion device 110, and is configured to send a first voltage conversion instruction including a first target voltage value to the voltage conversion device 110 when the state of charge value of the rechargeable battery 200 is greater than a first preset state of charge threshold, and 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 according to a first preset voltage value and a terminal voltage of the rechargeable battery 200, and the controller 120 is further configured to obtain a voltage corresponding to the first target voltage output by the voltage conversion device, 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 state of charge value of the rechargeable battery 200 is not greater than the first target voltage, wherein the second target voltage value is greater than the first target voltage value, the second target voltage value is obtained according to the first preset voltage value, and the second target voltage value is greater than the first target voltage value.

The voltage conversion device 110 may specifically be a voltage conversion device capable of adjusting a 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 the first target voltage or outputting a voltage corresponding to the second target voltage.

It should be understood that the specific structure and model of the voltage conversion device 110 described above may be arbitrary as long as it can perform outputting of a voltage corresponding to the target voltage under the action of the controller 120, and is not particularly limited in this embodiment.

The voltage input by the voltage conversion device 110 may be input through a mains supply, or may be input through a power battery or any storage battery, which is not particularly limited herein, and may be selected according to actual requirements.

Referring to fig. 2 in combination, in one embodiment of the present application, the system 100 further includes a high voltage power supply 130, where the high voltage power supply 130 is connected to the voltage conversion device 110, and is configured to provide high voltage power to the voltage conversion 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.

Correspondingly, if the system 100 further includes the 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 the target voltage (the first target voltage or the 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 one embodiment of the present application, the high voltage power supply device 130 includes a power battery pack for providing high voltage power, and a power battery management system connected to the power battery and the controller 120, respectively, and the power battery management system is configured to detect a voltage value of the high voltage power provided by the power battery pack and send the detected voltage value to the controller 120, and the controller 120 is further configured to obtain a first voltage conversion command according to the voltage value of the high voltage power and the first target voltage value, or obtain a second voltage conversion command according to the voltage value of the high voltage power and the second target voltage value.

It should be appreciated that high voltage power supply 130 may provide a voltage to a load (powered device) in addition to providing a voltage to rechargeable battery 200 to enable the powered device to operate properly.

The controller 120 may be implemented in at least one hardware form of Digital Signal Processing (DSP), field-Programmable gate array (fieldprogrammable GATE ARRAY, FPGA), programmable logic array (Programmable Logic Array, PLA). The controller 120 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), a modem, etc. 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 contents, and the modem is used for processing wireless communication. It will be appreciated that the modem may not be integrated into the processor and may be implemented solely by a single communication chip.

For example, if the charging control system of the rechargeable battery is applied to the vehicle, the controller 120 may be a processor specifically provided in a central control device in the vehicle, or may be a separately provided processor, which is not specifically limited herein, and may be set according to actual requirements.

The first preset state of charge threshold may be 92%, 95% or 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 by a wired connection or by a wireless communication connection, and may be selected according to actual requirements.

In one 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 acquire the target voltage (the first target voltage or the 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 acquired in real time. The target voltage may also be obtained in a preset time period every interval, so that the voltage conversion device 110 is controlled to output a voltage value corresponding to the target voltage according to the obtained target voltage, where the preset time period may be 1 second, 2 seconds, or 5 seconds, and is not limited herein.

The terminal voltage of the rechargeable battery 200 specifically refers to a voltage between the positive electrode and the negative electrode of the rechargeable battery 200, which may be detected by a battery management system of the rechargeable battery 200, or may be detected by an external battery detection device or apparatus, which is not specifically limited herein, and may be set according to actual requirements.

In one embodiment of the present application, the system 100 further includes a battery detection device 140, which is connected to the controller 120, for detecting a terminal voltage and a 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 one 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, which uses lithium metal or a lithium alloy as a positive/negative electrode material. The battery may be a battery of various shapes made of lithium metal or lithium alloy as the positive/negative electrode material and using a polymer as the electrolyte, and is not particularly limited herein, and may be selected or set according to actual needs.

The first target voltage value may be obtained by accumulating the first preset voltage value and the terminal voltage of the rechargeable battery 200.

The first preset voltage value may specifically be 0.1V, 0.2V, or 0.15V, etc., which is not limited in particular, and may be set according to actual requirements.

The second target voltage value may be obtained by accumulating the second preset voltage value, the first preset voltage value, and the terminal voltage of the rechargeable battery 200 according to the second preset voltage value, the first preset voltage value, and the terminal voltage of the rechargeable battery 200.

The second preset voltage value may be 0.05V, 0.07V, or 0.1V, as long as the second preset voltage value is smaller than the first preset voltage value.

Since the accuracy of the voltage conversion device that can adjust the voltage is typically 0.2V, 0.1V, or 0.05V, etc., there may be a case where the actual voltage output from the voltage conversion device 110 does not coincide with the target voltage, that is, the voltage output from the voltage conversion device 110 does not coincide with the target voltage when outputting the voltage corresponding to the target voltage. There may be a case where the output voltage is greater than the target voltage, or a case where the output voltage is less than the target voltage.

For example, if the accuracy of the voltage conversion device of the adjustable voltage is 0.1V, the first preset voltage value is 0.1V, after the first preset voltage value and the terminal voltage obtain the first target voltage, the controller 120 controls the voltage conversion device of the adjustable voltage to perform voltage conversion, where the voltage range corresponding to the first target voltage obtained by conversion should be between [ terminal voltage, terminal voltage+0.2v ], if the voltage value corresponding to the first target voltage is not greater than the terminal voltage, the situation that the rechargeable battery 200 cannot be charged may be caused, so that the controller 120 can ensure that the voltage is always greater than the terminal voltage 200 by charging the rechargeable battery by adding a second preset voltage value (e.g. 0.05V) to the first target voltage when the voltage value corresponding to the first target voltage is not greater than the terminal voltage, and when the voltage conversion device of the adjustable voltage performs voltage conversion after the second target voltage is obtained, the voltage range corresponding to the first target voltage obtained by conversion should be between [ terminal voltage+0.05, and terminal voltage+0.25v ].

The present application provides a charging control system 100 using a rechargeable battery, wherein a voltage conversion device 110 in the system 100 is connected to the rechargeable battery 200, a controller 120 is connected to the voltage conversion device 110, and is 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, wherein the first target voltage value is obtained according to a first preset voltage value and a terminal voltage of the rechargeable battery 200, and the controller 120 is further configured to 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 a 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, wherein the second target voltage value is obtained according to the second preset voltage value, the first preset voltage value and the terminal voltage of the rechargeable battery 200 is greater than the first target voltage value. Therefore, when the rechargeable battery 200 is charged quickly (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 condition of overcharge, and meanwhile, the condition that charging cannot be performed when the charging voltage is smaller 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 the present application, the controller 120 is further configured to output, to the voltage conversion device 110, a third voltage conversion instruction including a third target voltage value, 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, to instruct 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, where 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, etc., which is set according to the actual requirement.

The third target voltage value may be obtained by accumulating the third preset voltage value and the terminal voltage of the rechargeable battery 200.

By adopting the above arrangement, it is possible to realize charging with a higher voltage when the state of charge value of the rechargeable battery 200 is greater than the second state of charge threshold and less than the first state of charge threshold, thereby improving charging efficiency.

In still another embodiment of the present application, the controller 120 is further configured to output, to the voltage conversion device 110, a fourth voltage conversion instruction including a fourth target voltage value, when the state of charge value is less than or equal to the second preset state of charge threshold, to 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, wherein the fourth target voltage value is obtained according to a fourth preset voltage value and a terminal voltage of the rechargeable battery 200, and the fourth preset voltage value is greater than the third preset voltage value.

The third preset voltage value may be 0.5V, 0.6V or 0.8V, etc., which is set according to the actual requirement. By adopting the above arrangement of the present application, when the charge amount of the rechargeable battery 200 is too low (the state of charge value is lower than the second preset state of charge threshold value), the charging is performed in a high voltage manner (the fourth target voltage) to achieve rapid charging, so as to further improve the charging efficiency.

By adopting the above arrangement of the present application, in the charging process, when the state of charge value of the battery is lower than the second preset state of charge threshold value in the first stage, 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 at a faster speed, and 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 that the situation that the rechargeable battery 200 cannot be overcharged while the rechargeable battery 200 can be charged is ensured, and thus the charging efficiency is improved.

Referring to fig. 3, for example, taking the first state of charge threshold value of 95% and the second state of charge threshold value of 80%, the first preset voltage value of 0.1V, the second preset voltage value of 0.05V, the third preset voltage of 0.3V, and the fourth preset voltage of 0.5V as an example, when the charging control system 100 is powered on, the high voltage power supply device 130 starts to operate, the high voltage power supply voltage conversion device 110 may perform voltage conversion to supply to the electric device 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., electric quantity) and a terminal voltage of the rechargeable battery 200. If the state of charge value is lower than 80%, and the battery management system of the rechargeable battery 200 detects that the battery terminal voltage is U₂₀, step S12 is performed, in which the battery management system of the rechargeable battery 200 sends a charging request to the controller 120, and the requested voltage is U₂₁, where U₂₁＝U₂₀+△U₂₁ is a fourth preset voltage Δu₂₁ =0.5v, and step S13, the controller 120 outputs a fourth voltage conversion command including a fourth target voltage value (voltage U₂₁) to the voltage conversion device 110, so as to start charging the rechargeable battery 200 according to the constant voltage U₂₁. Step S14, when the state of charge of the rechargeable battery 200 reaches the second preset 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 preset voltage Δu₁₁ =0.3v, step S15, the controller 120 sends a third voltage conversion command including a third target voltage value (voltage U₁₁) to the voltage conversion device 110, instructing the voltage conversion device 110 to charge the rechargeable battery 200 according to the constant voltage U₁₁, step S16, if the state of charge is higher than the 95% soc, the battery detection module of the rechargeable battery 200 detects the terminal voltage U₃₀, the internal battery management system of the rechargeable battery sends a charging request to the controller 120, and the request voltage is U₃₁(U₃₁＝U₃₀+△U₃₁), the first preset voltage Δu₃₁ =0.1v, and step S17, the controller 120 outputs a first voltage conversion command including the first target voltage value (voltage U₃₁) to the voltage conversion device 110, so as to output the voltage U₃₂ to the rechargeable battery 200. Because the voltage accuracy of the voltage conversion device is 0.1V, step S18 is to charge according to the voltage U₃₂ if the voltage conversion device actually outputs the voltage U₃₂＞U₃₀, and step S19 is to send a charging request to the controller 120 by the internal battery management system if the voltage conversion device actually outputs the voltage U₃₂≤U₃₀, requesting the voltage U₃₃(U₃₃＝U₃₀+△U₃₁ +0.05). In step S20, the controller 120 outputs and sends a second voltage conversion command including a second target voltage value (voltage U₁₁) to the voltage conversion device 110, so as to charge the output voltage U₃₃ of the rechargeable battery 200 to the terminal voltage U₃₃. the constant voltage charge of the battery is carried out by adopting a 0.1V step voltage (0.05V is compensated when necessary) until the battery is full of electricity, and then the charging is stopped.

Referring to fig. 4 in combination, the present application further provides a method for controlling charging of a rechargeable battery, which may be applied to the controller 120 in the charging control system 100 of a rechargeable battery, and the method includes:

step S110, acquiring the state of charge value and terminal voltage of the rechargeable battery 200.

Step S120, if the state of charge value is greater than a first preset state of charge 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 according to 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 a terminal voltage of the rechargeable battery 200, wherein 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 performing step S110, the controller 120 may also compare the state of charge value with the first and second preset state of charge thresholds. If the threshold is greater than the first preset state of charge threshold, step S120 is performed.

In one embodiment, if 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, the method further comprises:

And outputting and transmitting a third voltage conversion instruction including a third target voltage value to the voltage conversion device 110, 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 larger than the first preset voltage value, and instructing the voltage conversion device 110 to output a voltage corresponding to the third target voltage to the rechargeable battery 200 so as to charge the rechargeable battery 200.

Further, in one embodiment, if the state of charge value is less than or equal to the second preset state of charge threshold, the method further includes outputting a fourth voltage conversion command 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, 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 the fourth preset voltage value is greater than the third preset voltage value.

Regarding the above specific description of steps S110 to S130, reference may be made to the foregoing specific description of the charging control system 100 for a rechargeable battery, which is not described in detail in this example.

A vehicle provided by the present application will be described below with reference to fig. 5.

Referring to fig. 5, based on the charging control system 100 of the rechargeable battery provided in the foregoing embodiment, the embodiment of the application further provides a vehicle capable of operating the charging control system 100 of the rechargeable battery, where the vehicle may be an apparatus such as an automobile, a ship or an airplane. As one aspect, the vehicle may be an automobile.

The vehicle may include a body and a charge control system 100 of a rechargeable battery as shown in fig. 1.

It should be understood that the body may be provided with a central control device, a memory, a combination navigation system, and the like. And the central control equipment is respectively connected with the memory and the integrated navigation system. The memory stores therein a program (program corresponding to the charging control method of the rechargeable battery) capable of executing the contents of the foregoing embodiments, and the controller 120 can execute the program stored in the memory.

Wherein the controller 120 may include one or more cores for processing data and a message matrix unit. The controller 120 connects various parts within the overall electronic device using various interfaces and lines, performs various functions of the vehicle and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory, and invoking data stored in the memory.

The vehicle may further include the high-voltage power supply device 130 and the rechargeable battery 200, and the description of this portion may refer to the detailed description of the foregoing embodiments, which is not repeated herein.

The combined navigation system combines navigation devices with different characteristics by using a computer and a data processing technology.

The Memory may include random access Memory (Random Access Memory, RAM) or Read-Only Memory (ROM). The memory may be used to store instructions, programs, code sets, or instruction sets. The memory may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function, and the like. The storage data area may also store data acquired by the vehicle in use.

The vehicle may further comprise a network module for receiving and transmitting electromagnetic waves, for implementing a mutual conversion of the electromagnetic waves and the electrical signals, so as to communicate with a communication network or other devices, such as an audio playback device. 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 the like. The network module may communicate with various networks such as the internet, intranets, wireless networks, or with other devices via wireless networks. The wireless network may include a cellular telephone network, a wireless local area network, or a metropolitan area network.

In summary, the charging control system 100, the method and the vehicle for a rechargeable battery provided by the application are characterized in that when a state of charge value of the rechargeable battery 200 is greater than a first preset state of charge threshold, the controller 120 is 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 value to the rechargeable battery 200 to charge the rechargeable battery 200, wherein 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 the first target voltage output by the voltage conversion device, 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 state of charge value of the rechargeable battery 200 is not greater than the first preset state of charge threshold, wherein the second target voltage value is greater than the first preset voltage value, and the second target voltage value is obtained according to the second preset voltage value. By adopting the above arrangement, when the rechargeable battery 200 is charged quickly (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 by using a smaller voltage, so as to avoid the overcharge condition, and meanwhile, the condition 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.

Claims (10)

1. A charging control system for a rechargeable battery, comprising:

the voltage conversion device is connected with the rechargeable battery and is used for carrying out voltage conversion on the input voltage and then outputting the 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 when the state of charge value of the rechargeable battery is larger than a first preset state of charge threshold value, and the first target voltage value is obtained according to the first preset voltage value and the terminal voltage of the rechargeable battery, and the voltage corresponding to the first target voltage value is the actual voltage output when the voltage conversion device outputs the first target voltage under the condition that the accuracy of the voltage conversion device is influenced;

The controller is further configured to obtain a voltage corresponding to a first target voltage output by the voltage conversion device, and send a second voltage conversion instruction including a second target voltage value to the voltage conversion device 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, the first preset voltage value is greater than the second preset voltage value, and the voltage corresponding to the second target voltage value is an actual voltage output when the voltage conversion device outputs the second target voltage under the condition that the accuracy of the voltage conversion device is affected.

2. The charge control system of claim 1, wherein the controller is further configured to output, 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, a third voltage conversion instruction that includes a third target voltage value, the third target voltage value being obtained from a third preset voltage value and a terminal voltage of the rechargeable battery, to the voltage conversion device, the third preset voltage value being greater than the first preset voltage value, to instruct the voltage conversion device to output a voltage corresponding to the third target voltage to the rechargeable battery to charge the rechargeable battery.

3. The charge control system of a rechargeable battery according to claim 2, wherein the controller is further configured to output, to the voltage conversion device, a fourth voltage conversion instruction including a fourth target voltage value obtained from a fourth preset voltage value and a terminal voltage of the rechargeable battery, the fourth preset voltage value being greater than the third preset voltage value, 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.

4. A charging control system for a rechargeable battery according to any one of claims 1-3, wherein the system further comprises a high voltage power supply means connected to the voltage conversion means for supplying high voltage power to the voltage conversion means;

The voltage conversion device is further configured to perform voltage conversion on the high-voltage power supply based on a first target voltage and output a voltage corresponding to the first target voltage, or perform voltage conversion on the high-voltage power supply based on a second target voltage and output a voltage corresponding to the second target voltage.

5. The charging control system of a rechargeable battery according to claim 4, wherein the high-voltage power supply device comprises a power battery pack for supplying high-voltage power and a power battery management system connected to the power battery and the controller, respectively, the power battery management system being configured to detect a voltage value of the supplied high-voltage power of the power battery pack and transmit the detected voltage value to the controller, and the controller being further configured to obtain a first voltage conversion instruction based on the voltage value of the high-voltage power and the first target voltage value, or obtain a second voltage conversion instruction based on the voltage value of the high-voltage power and the second target voltage value.

6. A charging control system for a rechargeable battery according to any one of claims 1-3, further comprising battery detection means connected to the controller for detecting terminal voltage and state of charge values of the rechargeable battery.

7. A charging control method of a rechargeable battery, wherein the method is applied to the controller in the charging control system of a rechargeable battery according to any one of claims 1 to 6, the method comprising:

Acquiring a state of charge value and terminal voltage of a rechargeable battery;

If the state of charge value is greater than a first preset state of charge threshold, a first voltage conversion instruction comprising a first target voltage value is sent to the voltage conversion device so as to instruct the voltage conversion device to output a voltage corresponding to the first target voltage to the rechargeable battery to charge the rechargeable battery, wherein the first target voltage value is obtained according to the first preset voltage value and the terminal voltage of the rechargeable battery;

And if the voltage corresponding to the first target voltage is not greater than the first target voltage, sending a second voltage conversion instruction comprising a second target voltage value to the voltage conversion device, and indicating 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 charge control method of a rechargeable battery according to claim 7, wherein the method further comprises:

And if 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, outputting and sending a third voltage conversion instruction comprising a third target voltage value to the voltage conversion device, and indicating 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 a terminal voltage of the rechargeable battery, and the third preset voltage value is greater than the first preset voltage value.

9. The charge control method of a rechargeable battery according to claim 8, wherein the method further comprises:

And if the state of charge value is smaller than or equal to the second preset state of charge threshold, outputting and sending a fourth voltage conversion instruction comprising a fourth target voltage value to the voltage conversion device, and indicating 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 a terminal voltage of the rechargeable battery, and the fourth preset voltage value is larger than the third preset voltage value.

10. A vehicle, comprising a vehicle body, a rechargeable battery and a charging control system of the rechargeable battery according to any one of claims 1 to 6, wherein the rechargeable battery is respectively connected with a voltage conversion device and a controller in the charging control system, and the rechargeable battery and the charging control system of the rechargeable battery are respectively arranged on the vehicle body.