Charging Control System, Method and Vehicle for Rechargeable Batteries

Abstract

The present application discloses a charging control method, system and vehicle for a rechargeable battery. A voltage conversion device and a controller are provided. When the state of charge value of the rechargeable battery is greater than the first preset state of charge threshold, 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 charge the rechargeable battery. The controller is further configured to obtain the 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, send 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 settings, it is ensured that when the rechargeable battery is almost fully charged, a smaller voltage is continuously used to charge the rechargeable battery to avoid overcharging, and at the same time, the charging efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of computer technologies, and more particularly, to a charging control system, method and vehicle for a rechargeable battery. Background Art

[0002] With the continuous improvement of people's living standards, the usage frequency of batteries and the like is also increasing, such as the usage frequency of batteries in vehicles or electrical devices. Correspondingly, the demand for batteries is increasing continuously. For users, on the one hand, they desire to increase the battery capacity, and on the other hand, they hope to shorten the charging time. The charging method of the battery has become the key to solving this problem.

[0003] Currently, the commonly adopted charging method is the constant current and then constant voltage charging method. In this method, the constant voltage time is relatively long during the charging process, and it is difficult to achieve the purpose of fast charging. Increasing the limiting voltage during the constant current charging of the battery can achieve the purpose of fast charging, but if the battery limiting voltage is too high, side reactions will occur inside the battery; if the limiting voltage is too low, the battery is difficult to be fully charged. Summary of the Invention

[0004] In view of this, the embodiments of the present application provide a charging control system, method and vehicle for a rechargeable battery, which can improve the efficiency during the battery charging process and ensure the charging safety at the same time.

[0005] In a first aspect, the embodiments of the present application provide a charging control system for a rechargeable battery. The system includes: a voltage conversion device and a controller. The voltage conversion device is connected to the rechargeable battery and is configured to perform voltage conversion on the input voltage and then output it to the rechargeable battery to charge the rechargeable battery; the controller is connected to the voltage conversion device and is configured to, when the state of charge value of the rechargeable battery is greater than a first preset state of charge threshold, send 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 the rechargeable battery to charge the rechargeable battery, 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 the voltage corresponding to the first target voltage output by the voltage conversion device, and when the voltage corresponding to the first target voltage is not greater than the first target voltage, 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, 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.

[0006] Second aspect, an embodiment of the present application provides a charging control method for a rechargeable battery. The method is applied to a processor in a charging control system of the rechargeable battery, and the method includes: obtaining a state of charge value and a terminal voltage of the rechargeable battery; 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; 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 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.

[0007] Third aspect, an embodiment of the present application provides a vehicle, including a vehicle body main body, a rechargeable battery, and the above-mentioned charging control system of the rechargeable battery. The rechargeable battery is respectively connected to 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 main body.

[0008] The embodiments of the present application provide a charging control system, method and vehicle for a rechargeable battery. The system includes a voltage conversion device and a controller. The controller is configured to, when the state of charge value of the rechargeable battery is greater than a first preset state of charge threshold, send a first voltage conversion instruction including a first target voltage value to the voltage conversion device, instructing the voltage conversion device to output a voltage corresponding to the first target voltage to charge the rechargeable battery, 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 the voltage corresponding to the first target voltage output by the voltage conversion device, and when the voltage corresponding to the first target voltage is not greater than the first target voltage, send a second voltage conversion instruction including a second target voltage value to the voltage conversion device, instructing the voltage conversion device to output a voltage corresponding to the second target voltage value 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. By adopting the above settings, it is ensured that when the rechargeable battery is almost fully charged (the state of charge value of the rechargeable battery is greater than the first preset state of charge threshold), a smaller voltage is continuously used to charge the rechargeable battery to avoid overcharging. At the same time, it can also avoid the situation where charging cannot be carried out when the charging voltage is less than the terminal voltage of the rechargeable battery during the charging process. Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 Fig. shows a schematic structural diagram of a charging control system for a rechargeable battery proposed by an embodiment of the present application;

[0011] Figure 2 Fig. shows another schematic structural diagram of a charging control system for a rechargeable battery proposed by an embodiment of the present application;

[0012] Figure 3 Fig. shows a schematic flow diagram of charging a rechargeable battery using a charging control system for a rechargeable battery proposed by an embodiment of the present application;

[0013] Figure 4 Fig. shows a schematic flow diagram of a charging control method for a rechargeable battery proposed by an embodiment of the present application;

[0014] Figure 5 The figure shows a schematic structural diagram of a vehicle provided by an embodiment of the present application. Detailed implementation manners

[0015] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0016] As Figure 1 shown, the present application provides a charging control system 100 for a rechargeable battery. The system 100 can be applied to vehicles such as battery cars, automobiles, airplanes or ships, etc., and can also be applied to mobile terminals or various electrical devices.

[0017] 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 the input voltage and then output it to the rechargeable battery 200 to charge the rechargeable battery 200; the controller 120 is connected to the voltage conversion device 110 and is configured to, when the state of charge value of the rechargeable battery 200 is greater than a first preset state of charge threshold, 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, wherein the first target voltage value is obtained according to a first preset voltage value and the terminal voltage of the rechargeable battery 200; the controller 120 is further configured to obtain the voltage corresponding to the first target voltage output by the voltage conversion device, and when the voltage corresponding to the first target voltage is not greater than the first target voltage, 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, 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.

[0018] Among them, the voltage conversion device 110 can specifically be a voltage conversion device with adjustable voltage. Specifically, the voltage conversion device 110 can, under the action of the controller 120, output a voltage corresponding to the target voltage in the voltage conversion instruction 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.

[0019] It should be understood that the specific structure and model of the above voltage conversion device 110 can be arbitrary, as long as it can output a voltage corresponding to the target voltage under the action of the controller 120, and no specific limitation is made in this embodiment.

[0020] The voltage input to the voltage conversion device 110 can be input through the mains power, or through a power battery or any storage battery. No specific limitation is made here, and it can be selected according to actual needs.

[0021] Please refer to Figure 2 , in an implementable manner of the present application, the system 100 further includes a high-voltage power supply device 130, and the high-voltage power supply device 130 is connected to the voltage conversion device 110 for supplying high-voltage power to the voltage conversion device 110;

[0022] The voltage conversion device 110 is further configured to convert the high-voltage power based on a first target voltage and output a voltage corresponding to the first target voltage, or convert the high-voltage power based on a second target voltage and output a voltage corresponding to the second target voltage.

[0023] Correspondingly, if the system 100 further includes a high-voltage power supply device 130, the voltage conversion device 110 further needs to perform 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). Correspondingly, the above system 100 may further include a voltage detection device for detecting the voltage of the high-voltage power supply device 130, or a battery management system in the high-voltage power supply device 130.

[0024] In an implementable 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 to provide high-voltage power. The power battery management system is respectively connected to the power battery and the controller 120. The power battery management system is configured to detect the voltage value of the high-voltage power provided by the power battery pack and send it to the controller 120. The controller 120 is further configured to obtain a first voltage conversion instruction according to the voltage value of the high-voltage power and the first target voltage value, or obtain a second voltage conversion instruction according to the voltage value of the high-voltage power and the second target voltage value.

[0025] It should be understood that in addition to supplying voltage to the rechargeable battery 200, the high-voltage power supply device 130 can also supply voltage to a load (electrical device) to enable the electrical device to work properly.

[0026] The controller 120 can be implemented in at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The controller 120 can integrate one or a combination of several of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, etc. Among them, the CPU mainly processes the operating system, user interface, application programs, etc.; the GPU is responsible for rendering and drawing the display content; the modem is used to process wireless communication. It can be understood that the above-mentioned modem may not be integrated into the processor and can be implemented separately through a communication chip.

[0027] Exemplarily, when the charging control system of the rechargeable battery is applied in a vehicle, the controller 120 can specifically be a processor set in the vehicle's central control device or an independently set processor, which is not specifically limited here and can be set according to actual needs.

[0028] The first preset state of charge threshold can be 92%, 95%, 97%, etc., and can be set according to actual needs.

[0029] The connection mode between the controller 120 and the voltage conversion device 110 and the high-voltage power supply device 130 can be a wired connection or a wireless communication connection, and can be selected according to actual needs.

[0030] In an implementable manner, the controller 120 and the voltage conversion device 110 and the high-voltage power supply device 130 can be connected by means of a communication bus.

[0031] The controller 120 can obtain the target voltage (the first target voltage or the second target voltage) in real time to control the voltage conversion device 110 to output the voltage value corresponding to the target voltage according to the target voltage obtained in real time. It can also obtain the target voltage at preset time intervals to control the voltage conversion device 110 to output the voltage value corresponding to the target voltage according to the obtained target voltage. Among them, the preset time interval can be 1 second, 2 seconds, 5 seconds, etc., which is not specifically limited here.

[0032] The terminal voltage of the rechargeable battery 200 specifically refers to the voltage between the positive and negative electrodes of the rechargeable battery 200, which can be detected according to the battery management system of the rechargeable battery 200, or can be detected by an external battery detection device or component. It is not specifically limited here and can be set according to actual needs.

[0033] In an implementable manner of the present application, the system 100 further includes a battery detection device 140, and the battery detection device is connected to the controller 120 for detecting the terminal voltage and state of charge value of the rechargeable battery 200.

[0034] Among them, the above-mentioned battery detection device 140 can specifically be a device integrated with a battery management system.

[0035] The above-mentioned rechargeable battery 200 can specifically be a lithium battery, a nickel-cadmium battery, a nickel-metal hydride battery, etc.

[0036] In an implementable manner of the present application, the above-mentioned rechargeable battery 200 is specifically a lithium battery.

[0037] The above-mentioned lithium battery can specifically be a battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. It can also be various-shaped batteries with lithium metal or lithium alloy as the positive / negative electrode material and using a polymer as the electrolyte. It is not specifically limited here and can be selected or set according to actual needs.

[0038] The way to obtain the first target voltage value according to the first preset voltage value and the terminal voltage of the rechargeable battery 200 can be to add the first preset voltage value to the terminal voltage of the rechargeable battery to obtain the first target voltage value.

[0039] The above-mentioned first preset voltage value can specifically be 0.1V, 0.2V, 0.15V, etc. It is not specifically limited again and can be set according to actual needs.

[0040] The way to obtain 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 can be: add 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.

[0041] Among them, the above-mentioned second preset voltage value can be 0.05V, 0.07V, 0.1V, etc., as long as it is less than the first preset voltage value.

[0042] Since the accuracy of the voltage conversion device with adjustable voltage is usually 0.2V, 0.1V or 0.05V, etc., there may be a situation where the actual voltage output by the voltage conversion device 110 is inconsistent with the target voltage. That is, when the voltage conversion device 110 outputs a voltage corresponding to the target voltage, the output voltage is inconsistent with the target voltage. There may be a situation where the output voltage is greater than the target voltage, or there may be a situation where the output voltage is less than the target voltage.

[0043] Exemplarily, if the accuracy of the voltage conversion device with adjustable voltage is 0.1V and the first preset voltage value is 0.1V, after the controller 120 obtains the first target voltage according to the first preset voltage value and the terminal voltage and controls the voltage conversion device with adjustable voltage to perform voltage conversion, the voltage value 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, it may cause the situation where the rechargeable battery 200 cannot be charged. Therefore, when the voltage value corresponding to the first target voltage is not greater than the terminal voltage, the controller 120 adds a second preset voltage value (such as 0.05V) to the first target voltage to obtain the second target voltage. After obtaining the second target voltage, when the voltage conversion device with adjustable voltage performs voltage conversion, the voltage value range corresponding to the first target voltage obtained by conversion should be between [terminal voltage + 0.05, terminal voltage + 0.25V]. At this time, it can be ensured that the charging voltage is always greater than the terminal voltage of the rechargeable battery 200, that is, the rechargeable battery 200 can be charged.

[0044] This application adopts a charging control system 100 for a rechargeable battery. The voltage conversion device 110 in the system 100 is connected to the rechargeable battery 200, and the controller 120 is connected to the voltage conversion device 110. When the state of charge value of the rechargeable battery 200 is greater than the first preset state of charge threshold, the controller 120 sends a first voltage conversion instruction including a first target voltage value to the voltage conversion device 110, instructing the voltage conversion device 110 to output a voltage corresponding to the first target voltage to charge the rechargeable battery 200. Wherein, the first target voltage value is obtained according to the first preset voltage value and the terminal voltage of the rechargeable battery 200. The controller 120 is further configured to, when the voltage corresponding to the first target voltage is not greater than the first target voltage, send a second voltage conversion instruction including a second target voltage value to the voltage conversion device 110, instructing the voltage conversion device 110 to output a voltage corresponding to the second target voltage value to charge the rechargeable battery 200. 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, and 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. Thus, it is ensured that when the rechargeable battery 200 is almost fully charged (the state of charge value of the rechargeable battery 200 is greater than the first preset state of charge threshold), a smaller voltage is continuously used to charge the rechargeable battery 200 to avoid overcharging. At the same time, it can also avoid the situation where charging cannot be performed when the charging voltage is less than the terminal voltage of the rechargeable battery 200 during the charging process.

[0045] To improve the charging efficiency when charging the rechargeable battery 200, in this application, the controller 120 is further configured to, when the state of charge value is greater than the second preset state of charge threshold and less than or equal to the first preset state of charge threshold, output and send 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 charge the rechargeable battery 200. Wherein, the third target voltage value is obtained according to the 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.

[0046] The above-mentioned second state of charge threshold can be 75%, 78%, 80%, 82% or 85%, etc., and can be set according to actual needs.

[0047] The above-mentioned second preset voltage value can be 0.25V, 0.3V or 0.4V, etc., and can be set according to actual needs.

[0048] The manner of obtaining the third target voltage value based on the third preset voltage value and the terminal voltage of the rechargeable battery 200 may be to accumulate the third preset voltage value and the terminal voltage of the rechargeable battery to obtain the third target voltage value.

[0049] By adopting the above settings, 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, a higher voltage can be used for charging, thereby improving the charging efficiency.

[0050] 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, send 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 for charging the rechargeable battery 200, where the fourth target voltage value is obtained based on 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.

[0051] The above-mentioned third preset voltage value may be 0.5V, 0.6V or 0.8V, etc., which can be set according to actual requirements. By adopting the above settings of the present application, when the rechargeable battery 200 has too low power (the state of charge value is lower than the second preset state of charge threshold), a high-voltage method (the fourth target voltage) is used for charging to achieve fast charging, so as to further improve the charging efficiency.

[0052] By adopting the above settings of the present application, it can be realized that during 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, high-voltage charging (the fourth target voltage) is used to achieve fast charging. When the voltage is between the first preset state of charge threshold and the second state of charge threshold, a higher voltage (the third target voltage) is used for charging to charge at a faster speed. When the state of charge value is higher than the first preset state of charge threshold, the first target voltage or the second target voltage is used for charging to ensure that the rechargeable battery 200 can be charged while the rechargeable battery 200 will not be overcharged, thereby improving the charging efficiency.

[0053] Please refer to Figure 3, Exemplarily, 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 work, and can supply high voltage to the voltage conversion device 110 for voltage conversion to supply the electrical equipment and charge the charging battery 200. Specifically, when charging the charging battery 200, the following steps can be executed:

[0054] Step S11: The battery management system of the charging battery 200 detects the state of charge value (SOC, that is, the battery power) and the terminal voltage of the charging battery 200. If the state of charge value is lower than 80%, at this time, the battery management system of the charging battery 200 detects that the battery terminal voltage is U 20 , then step S12 is executed: The battery management system of the charging battery 200 sends a charging request to the controller 120, and the requested voltage is U 21 , where U 21 = U 20 + △U 21 , that is, the fourth preset voltage is △U 21 = 0.5V; Step S13: The controller 120 outputs and sends a fourth voltage conversion instruction including the fourth target voltage value (voltage U 21 ) to the voltage conversion device 110 to start charging the charging battery 200 at a constant voltage U 21 . Step S14 When charging to the second preset state of charge threshold of the charging battery 200, the internal battery management system of the charging battery 200 sends a charging request to the controller 120, and the requested voltage is U 11 (U 11 = U 10 + △U 11 ), where the third preset voltage △U 11 = 0.3V, Step S15: The controller 120 sends a third voltage conversion instruction including the third target voltage value (voltage U 11 ) to the voltage conversion device 110, instructing the voltage conversion device 110 to charge the charging battery 200 at a constant voltage U 11 ; Step S16: If the state of charge value is higher than 95% SOC during charging, the battery detection module of the charging battery 200 detects the terminal voltage U 30 , and the internal battery management system of the battery sends a charging request to the controller 120, and the requested voltage is U 31 (U 31 = U 30 + △U 31 ), the first preset voltage value △U 31= 0.1V; Step S17: The controller 120 outputs and sends a first voltage conversion instruction including a first target voltage value (voltage U 31 ) to the voltage conversion device 110 to output voltage U 32 to the rechargeable battery 200. Since the voltage accuracy of the voltage conversion device is 0.1V, Step S18: If the actually output voltage U 32 of the voltage conversion device is greater than U 30 , charge according to voltage U 32 . Step S19: If the actually output voltage U 32 of the voltage conversion device is less than or equal to U 30 , then the battery internal battery management system sends a charging request to the controller 120, requesting voltage U 33 (U 33 = U 30 + △U 31 + 0.05). Step S20: The controller 120 outputs and sends a second voltage conversion instruction including a second target voltage value (voltage U 11 ) to the voltage conversion device 110 to output voltage U 33 to charge the rechargeable battery 200 until the terminal voltage is U 33 . The low-voltage battery is charged at a constant voltage with a 0.1V step voltage (compensating 0.05V if necessary) until it is fully charged and then charging stops.

[0055] Please refer to Figure 4 in combination. The present application also provides a charging control method for a rechargeable battery. This method can be applied to the controller 120 in the charging control system 100 of the rechargeable battery as described above. The method includes:

[0056] Step S110: Obtain the state of charge value and the terminal voltage of the rechargeable battery 200.

[0057] Step S120: If the state of charge value is greater than a first preset state of charge threshold, 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.

[0058] Wherein, the first target voltage value is obtained based on a first preset voltage value and the terminal voltage of the rechargeable battery 200.

[0059] Step S130: If the voltage corresponding to the first target voltage is not greater than the first target voltage, send a second voltage conversion instruction including a second target voltage value to the voltage conversion device 110, instructing 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.

[0060] 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.

[0061] It should be understood that after performing step S110, the controller 120 can also compare the state of charge value with a first preset state of charge threshold and a second preset state of charge threshold. If it is greater than the first preset state of charge threshold, then perform the above step S120.

[0062] In an implementable manner, if the state of charge value is greater than the second preset state of charge threshold and less than or equal to the first preset state of charge threshold, the method further includes:

[0063] Output and send 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 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.

[0064] Further, in an implementable manner, if the state of charge value is less than or equal to the second preset state of charge threshold, the method further includes: Output and send 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 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.

[0065] Regarding the above specific descriptions of steps S110 - S130, reference can be made to the above specific description of the charging control system 100 of the rechargeable battery, which will not be elaborated one by one in this example.

[0066] Next, a vehicle provided by the present application will be described with reference to 5.

[0067] Please refer to Figure 5 , based on the charging control system 100 of the rechargeable battery provided in the above embodiment, the present application embodiment also provides a vehicle capable of operating the charging control system 100 of the rechargeable battery. The vehicle can be devices such as an automobile, a ship, or an airplane. As one way, the above vehicle can be an automobile.

[0068] A vehicle may include a vehicle body and a charging control system 100 of a charging battery as shown in Figure 1 .

[0069] It should be understood that the vehicle body may be provided with a central control device, a memory, a combined navigation system, etc. The central control device is respectively connected to the memory and the combined navigation system. Among them, the memory stores a program (a program corresponding to the charging control method of the charging battery) that can execute the content in the foregoing embodiments, and the controller 120 can execute the program stored in the memory.

[0070] Among them, 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 entire electronic device using various interfaces and lines, and executes various functions of the vehicle and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory, and by calling data stored in the memory.

[0071] The above-mentioned vehicle may further include a high-voltage power supply device 130 and a charging battery 200. For the description of this part, reference may be made to the specific description of the foregoing embodiments, and details will not be repeated here.

[0072] The combined navigation system is a navigation system that combines navigation devices with different characteristics using computer and data processing technologies.

[0073] The memory may include a Random Access Memory (RAM), and may also include a Read-Only Memory. The memory can be used to store instructions, programs, codes, code sets, or instruction sets. The memory may include a program storage area and a data storage area. Among them, the program storage area can store instructions for implementing an operating system, instructions for implementing at least one function, etc. The data storage area can also store data obtained during the use of the vehicle.

[0074] The vehicle may further include a network module. The network module is used to receive and send electromagnetic waves, realize the mutual conversion between electromagnetic waves and electrical signals, so as to communicate with a communication network or other devices, such as communicating with an audio playback device. The network module may include various existing circuit elements for performing these functions, such as antennas, radio frequency transceivers, digital signal processors, encryption / decryption chips, subscriber identity module (SIM) cards, memories, etc. The network module can communicate with various networks such as the Internet, enterprise intranets, wireless networks, or communicate with other devices through a wireless network. The above-mentioned wireless network may include a cellular phone network, a wireless local area network, or a metropolitan area network.

[0075] In summary, a charging control system 100, a method and a vehicle for a rechargeable battery provided by the present application, by setting a voltage conversion device 110 and a controller 120, 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 the state of charge value of the rechargeable battery 200 is greater than a first preset state of charge threshold, instructing the voltage conversion device 110 to output a voltage corresponding to the first target voltage to charge the rechargeable battery 200, wherein the first target voltage value is obtained according to a first preset voltage value and the terminal voltage of the rechargeable battery 200; the controller 120 is further configured to obtain the voltage corresponding to the first target voltage output by the voltage conversion device, and when the voltage corresponding to the first target voltage is not greater than the first target voltage, send a second voltage conversion instruction including a second target voltage value to the voltage conversion device 110, instructing the voltage conversion device 110 to output a voltage corresponding to the second target 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. By adopting the above settings, it is ensured that when the rechargeable battery 200 is almost fully charged (the state of charge value of the rechargeable battery 200 is greater than the first preset state of charge threshold), a smaller voltage is continuously used to charge the rechargeable battery 200 to avoid overcharging. At the same time, it can also avoid the situation where charging cannot be performed when the charging voltage is less than the terminal voltage of the rechargeable battery 200 during the charging process.

Claims

1. A charging control system for a rechargeable battery, characterized in that, Comprising: A voltage conversion device, which is connected to the rechargeable battery and is used to convert the input voltage and then output it to the rechargeable battery to charge the rechargeable battery; A controller, which is connected to the voltage conversion device and is used to send 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 the rechargeable battery 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 a 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 by the voltage conversion device when outputting the first target voltage under the influence of its accuracy; The controller is further used to obtain the voltage corresponding to the first target voltage output by the voltage conversion device, and when the voltage corresponding to the first target voltage is not greater than the first target voltage, 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. 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, the first preset voltage value is greater than the second preset voltage value, and the voltage corresponding to the second target voltage value is the actual voltage output by the voltage conversion device when outputting the second target voltage under the influence of its accuracy.

2. The charging control system of the rechargeable battery according to claim 1, wherein The controller is further used to send a third voltage conversion instruction 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 to charge the rechargeable battery when the state of charge value is greater than a second preset state of charge threshold value and less than or equal to the first preset state of charge threshold value. 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 greater than the first preset voltage value.

3. The charging control system for a rechargeable battery according to claim 2, wherein, The controller is further used to send a fourth voltage conversion instruction 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 value. 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 greater than the third preset voltage value.

4. The charging control system for a rechargeable battery according to any one of claims 1 to 3, characterized in that, The system further includes a high-voltage power supply device, which is connected to the voltage conversion device and is used to provide high-voltage electricity to the voltage conversion device; The voltage conversion device is further configured to convert the high-voltage power based on the first target voltage and output a voltage corresponding to the first target voltage, or convert the high-voltage power based on the second target voltage and output a voltage corresponding to the second target voltage.

5. The charging control system for a rechargeable battery according to claim 4, characterized in that, The high-voltage power supply device includes a power battery pack and a power battery management system. The power battery pack is configured to provide high-voltage power. The power battery management system is respectively connected to the power battery and the controller. The power battery management system is configured to detect the voltage value of the high-voltage power provided by the power battery pack and send it to the controller. The controller is further configured to obtain a first voltage conversion instruction according to the voltage value of the high-voltage power and the first target voltage value, or obtain a second voltage conversion instruction according to the voltage value of the high-voltage power and the second target voltage value.

6. The charging control system for a rechargeable battery according to any one of claims 1-3, characterized in that, The system further includes a battery detection device connected to the controller for detecting the terminal voltage and state of charge value of the rechargeable battery.

7. A charging control method for a rechargeable battery, characterized in that, The method is applied to a controller in a charging control system of a rechargeable battery according to any one of claims 1-6, and the method includes: Obtaining the state of charge value and terminal voltage of the rechargeable battery; 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 the rechargeable battery 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; 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 the rechargeable battery to charge the rechargeable battery, where 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 the rechargeable battery according to claim 7, characterized in that, The method further includes: 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, sending a third voltage conversion instruction 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 to charge the rechargeable battery, where 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 greater than the first preset voltage value.

9. The charging control method of the rechargeable battery according to claim 8, characterized in that, The method further includes: If the state of charge value is less than or equal to the second preset state of charge threshold, a fourth voltage conversion instruction including a fourth target voltage value is sent to the voltage conversion device, instructing the voltage conversion device to output a voltage corresponding to the fourth target voltage to the rechargeable battery 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 greater than the third preset voltage value.

10. A vehicle, characterized in that, A charging control system of a vehicle body main body, a rechargeable battery, and the rechargeable battery according to any one of claims 1-6, wherein the rechargeable battery is respectively connected to 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 main body.

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