Low-voltage lithium battery recharging and charging method and device, electronic equipment and storage medium

Abstract

The invention discloses a low-voltage lithium battery recharging and charging method and device, electronic equipment and a storage medium, and belongs to the technical field of vehicle engineering, and the method comprises the steps: monitoring the state of a lithium battery and the working condition of a whole vehicle in real time; judging a working condition and triggering a corresponding process; if the vehicle is in an OFF working condition, an ACC working condition or an ON working condition without high voltage, entering a charging process; if the vehicle is in the high-voltage working condition, entering a dynamic charging process; a dynamic charging process: according to request voltages of different charging stages of the lithium battery, dynamically adjusting a DCDC output voltage; and continuously and circularly monitoring and adjusting. According to the invention, intelligent charging of the low-voltage lithium battery under all working conditions is realized, and the service life of the lithium battery is prolonged; and the voltage can be dynamically regulated according to the charging request voltage of the lithium battery, so that the problem of DCDC overload shutdown easily caused by fixed voltage output is avoided, and the charging efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicle engineering, and particularly relates to a low-voltage lithium battery power supplementing and charging method and device, electronic equipment and storage medium. BACKGROUND

[0002] In a new energy (pure electric) vehicle, a low-voltage lithium battery supplies power for low-voltage electrical equipment such as lights and instruments, and the state of charge (SOC) of the low-voltage lithium battery is crucial to the stable operation of the low-voltage system, and the low-voltage lithium battery needs to be reasonably charged to ensure sufficient power.

[0003] The existing new energy (pure electric) vehicle low-voltage lithium battery charging solution has the problems of poor adaptability of power supplementing time and poor adaptability of all working conditions, which leads to easy over-discharge of the battery. Specifically, there is a lack of intelligent power supplementing mechanism under all working conditions (OFF, ACC, and ON), and the power supplementing trigger condition is single or not accurate. Since the power supplementing lacks intelligent triggering and monitoring under all working conditions, the low-voltage lithium battery is easy to enter the latch-up region due to the lack of timely power supplementing under the working condition that the vehicle is in the OFF state but the low-voltage equipment still has a small current consumption, which affects the normal work of the low-voltage system and reduces the service life of the battery.

[0004] At the same time, the DCDC voltage regulation in the high-voltage stage is not flexible, which easily leads to overloading and shutdown, affecting the charging efficiency and the service life of the battery and DCDC. Specifically, during high-voltage stage charging, the DCDC usually adopts a fixed voltage output mode and cannot dynamically adjust the voltage according to the actual charging request voltage of the lithium battery. The DCDC fixed voltage output in the high-voltage stage cannot adapt to the voltage demand of the lithium battery in different charging stages. When the lithium battery needs a higher charging power, the DCDC is easy to overload and then shut down, which leads to low charging efficiency and may damage the DCDC and the lithium battery, affecting the continuity and safety of the charging process. SUMMARY

[0005] In view of the problems in the prior art, the application provides a low-voltage lithium battery power supplementing and charging method, device, electronic equipment and storage medium, which realizes intelligent power supplementing of the low-voltage lithium battery under all working conditions and prolongs the service life of the lithium battery. The voltage can be dynamically regulated according to the charging request voltage of the lithium battery, which avoids the problem of DCDC overloading and shutdown caused by fixed voltage output, and improves the charging efficiency and safety.

[0006] The application is implemented in the following manner. In one aspect, the application provides a low-voltage lithium battery power supplementing and charging method, which comprises the following steps. Real-time monitoring of the state of the lithium battery and the working condition of the vehicle; Judging the working condition and triggering the corresponding process: if the vehicle is in the OFF, ACC or ON working condition without high-voltage, the power supplementing process is entered; if the vehicle is in the high-voltage working condition, the dynamic charging process is entered; Dynamic charging process: according to the request voltage of different charging stage of lithium battery, dynamically adjust the DCDC output voltage; Continuous cycle monitoring and adjustment.

[0007] Further, the dynamic charging process is specifically: Initial stage: lithium battery sends request to DCDC voltage regulation module, requires DCDC output voltage , wherein is the actual terminal voltage of lithium battery, after receiving the request, the DCDC voltage regulation module adjusts the output voltage to this value, and charges the lithium battery in the initial stage; Charging stage: lithium battery requests DCDC output voltage , the DCDC voltage regulation module adjusts the output voltage to this value; Pressure maintaining stage: lithium battery requests Keep 28V, DCDC voltage regulation module controls DCDC output voltage to be stable at 28V.

[0008] Further, in the charging stage, as the state of charge rises, the lithium battery voltage gradually rises, and the DCDC output voltage is dynamically adjusted to meet the charging demand, and the voltage change ; In the pressure maintaining stage, when the state of charge of lithium battery in the pressure maintaining stage reaches 90%, it enters the charging stage again for charging.

[0009] Further, the real-time monitoring of lithium battery state and vehicle working condition includes: lithium battery state monitoring module continuously monitors the state of charge of lithium battery; Vehicle working condition detection module real-time detects vehicle working condition, including OFF, ACC, ON without high voltage and high voltage working condition.

[0010] Further, according to the state of charge value, the lithium battery state is divided into three intervals of power supply request area, latch area and normal working area, wherein: The state of charge of latch area is 0%~20%, and the lithium battery state is in latch area when stopping external power supply to avoid overdischarge; The state of charge of power supply request area is 20%~50%, and the lithium battery state in power supply request area triggers power supply request.

[0011] The state of charge of normal working area is 50%~100%, and the lithium battery state in normal working area is normal operation without special power supply.

[0012] Further, the power supply process is: When the state of charge of lithium battery state is in power supply request area, the power supply control module sends power supply request to vehicle controller every 1 hour to start power supply operation; When the state of charge of the lithium battery is in the latch-up region, the power compensation control module triggers the lithium battery latch-up protection immediately, stops the lithium battery from supplying power to the outside, and avoids damage caused by over-discharge of the battery.

[0013] Further, the power compensation operation can charge the lithium battery using other power sources of the vehicle to prevent the state of charge from further decreasing.

[0014] Another aspect of the present application provides a low-voltage lithium battery power compensation and charging device for implementing any of the methods described above, comprising: a lithium battery state monitoring module for monitoring the state of charge of the lithium battery in real time; a power compensation control module for controlling the intelligent power compensation process according to the state of the lithium battery and the working condition of the vehicle; a DCDC voltage regulation module for dynamically adjusting the output voltage of the DCDC according to the charging request voltage of the lithium battery, so as to realize dynamic charging; and a working condition detection module for detecting whether the vehicle is in an OFF, ACC or ON working condition.

[0015] Still another aspect of the present application provides an electronic device, comprising at least one processor, a memory connected to the at least one processor in communication, and a computer program stored in the memory and executable by the at least one processor, wherein the at least one processor implements any of the methods described above when executing the computer program.

[0016] Still another aspect of the present application provides a non-volatile readable storage medium having a computer program stored thereon, wherein the computer program implements any of the methods described above when executed.

[0017] The present application has the advantages and technical effects that: due to the above technical solution, intelligent power compensation of the low-voltage lithium battery under all working conditions is realized, the lithium battery can be supplied with power in time, it is avoided that the lithium battery enters the latch-up region due to insufficient power, the service life of the lithium battery is effectively prolonged, and stable operation of the low-voltage system of the vehicle is ensured; in the high-voltage stage, the DCDC can dynamically regulate the voltage according to the charging request voltage of the lithium battery, the problem of overloading and shutdown of the DCDC caused by fixed voltage output is avoided, the charging efficiency and safety are improved, the DCDC is protected, and the service life of the DCDC is prolonged. Intelligent power compensation, dynamic and safe charging of the low-voltage lithium battery are realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a workflow diagram provided by an embodiment of the present application.

[0019] Figure 2 is a device principle block diagram provided by an embodiment of the present application.

[0020] Figure 3Figure 1 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0022] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as limiting the device or element indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0023] As shown in FIG. 1, the present application provides a low-voltage lithium battery power compensation and charging method, which comprises the following steps. Figure 1 Real-time monitoring of lithium battery state and vehicle working condition.

[0024] The lithium battery state monitoring module continuously monitors the state of charge of the lithium battery; the vehicle working condition detection module detects the vehicle working condition in real time, including OFF, ACC, ON, no high-voltage connection, and high-voltage connection working conditions. It should be noted that no high-voltage connection means no connection with the high-voltage battery pack in the electric vehicle, and high-voltage connection means connection with the high-voltage battery pack in the electric vehicle.

[0025] Judging the working condition and triggering the corresponding process: if the vehicle is in the OFF, ACC or ON working condition without high-voltage connection, the power compensation process is entered; if the vehicle is in the high-voltage connection working condition, the dynamic charging process is entered.

[0026] According to the state of charge value, the lithium battery state is divided into three intervals of power compensation request area, latch area and normal working area, wherein: the state of charge of the latch area is 0%~20%, the lithium battery state is stopped to supply power externally when it is in the latch area to avoid over-discharge; the state of charge of the power compensation request area is 20%~50%, the lithium battery state triggers a power compensation request when it is in the power compensation request area. The state of charge of the normal working area is 50%~100%, and the lithium battery state is normally operated when it is in the normal working area, and no special power compensation is needed.

[0027] The power compensation process is as follows: When the state of charge of the lithium battery state is in the power compensation request area, the power compensation control module sends a power compensation request to the vehicle controller every 1 hour, starts the power compensation operation, and specifically, the power compensation operation can use other power sources of the vehicle to charge the lithium battery to prevent the state of charge from further decreasing.

[0028] ​When the state of charge of the lithium battery is in the latch-up region, the power supply control module triggers the lithium battery latch-up protection immediately, stops the lithium battery from supplying power externally, and avoids damage caused by over-discharge of the battery.

[0029] Dynamic charging process: dynamically adjust the DCDC output voltage according to the request voltage of the lithium battery in different charging stages.

[0030] The dynamic charging process is specifically: Initial stage: the lithium battery sends a request to the DCDC voltage regulation module, requiring the DCDC output voltage , wherein is the actual terminal voltage of the lithium battery, and the DCDC voltage regulation module adjusts the output voltage to this value after receiving the request, to charge the lithium battery in the initial stage; Charging stage: the lithium battery requests the DCDC output voltage , and the DCDC voltage regulation module adjusts the output voltage to this value; as the state of charge rises, the lithium battery voltage gradually rises, and the DCDC output voltage is dynamically adjusted to meet the charging demand, and the voltage change

[0031] Pressure maintaining stage: the lithium battery requests to maintain 28V, and the DCDC voltage regulation module controls the DCDC output voltage to be stable at 28V; when the state of charge of the lithium battery in the pressure maintaining stage reaches 90%, the charging stage is entered again for charging.

[0032] Continuous cycle monitoring and adjustment.

[0033] As shown in Figure 2 , another aspect of the present application provides a low-voltage lithium battery power supply and charging device 100 for implementing any of the methods described above, comprising: A lithium battery state monitoring module 101 for monitoring the state of charge of the lithium battery in real time; A power supply control module 103 for controlling the intelligent power supply process according to the state of the lithium battery and the vehicle operating condition; A DCDC voltage regulation module 104 for dynamically adjusting the DCDC output voltage according to the charging request voltage of the lithium battery to achieve dynamic charging; And a vehicle operating condition detection module 102 for detecting whether the vehicle is in an OFF, ACC or ON operating condition.

[0034] As shown in Figure 3 , still another aspect of the present application provides an electronic device 200, comprising at least one processor 201, a memory 202 communicatively connected to the at least one processor, and a computer program stored in the memory and executable by the at least one processor, wherein the at least one processor implements any of the methods described above when executing the computer program.

[0035] The application further provides a non-volatile readable storage medium, which stores a computer program, and the computer program is executed to implement any of the methods.

[0036] By adopting the technical scheme, the intelligent power compensation of the low-voltage lithium battery under all working conditions is realized, the lithium battery can be compensated in time, the lithium battery is prevented from entering the latch-up region due to power shortage, the service life of the lithium battery is effectively prolonged, the stable operation of the low-voltage system of the vehicle is ensured, in the high-voltage stage, the DCDC can dynamically adjust the voltage according to the charging request voltage of the lithium battery, the problem of the overloading shutdown of the DCDC caused by the fixed voltage output is avoided, the charging efficiency and safety are improved, the DCDC is protected, and the service life of the DCDC is prolonged. The intelligent power compensation, dynamic and safe charging of the low-voltage lithium battery are realized.

[0037] The above merely describes preferred embodiments of the application but not for the purpose of limiting the application, and any modification, equivalent replacement and improvement within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A low-voltage lithium battery power supplementing and charging method, characterized in that, The method comprises the following steps: Real-time monitoring of lithium battery status and vehicle working condition; Judging the working condition and triggering the corresponding process: if the vehicle is in OFF, ACC or ON working condition without high voltage, enter the power compensation process; If the vehicle is in high voltage working condition, enter the dynamic charging process; Dynamic charging process: dynamically adjusting the DCDC output voltage according to the request voltage of different charging stages of lithium battery; Continuous cycle monitoring and adjustment.

2. The method of claim 1, wherein, The dynamic charging process specifically comprises: Initial stage: lithium battery sends request to DCDC voltage regulation module, requiring DCDC output voltage wherein is the actual terminal voltage of the lithium battery, after receiving the request, the DCDC voltage regulation module adjusts the output voltage to this value, charging the lithium battery in the initial stage; Charging phase: lithium battery requests DCDC output voltage DCDC voltage regulation module adjusts output voltage to this value; Pressure maintaining phase: lithium battery request Keep 28V, DCDC voltage regulation module controls DCDC output voltage to be stable at 28V.

3. The method of claim 2, wherein, In the charging stage, as the state of charge rises, the lithium battery voltage gradually rises, and the DCDC output voltage is dynamically adjusted to meet the charging demand, and the voltage change amount In the pressure maintaining stage, when the state of charge of the lithium battery in the pressure maintaining stage reaches 90%, the charging stage is entered again for charging.

4. The method according to claim 1 or 2, characterized in that, The real-time monitoring of lithium battery status and vehicle working condition comprises that the lithium battery status monitoring module continuously monitors the state of charge of lithium battery; and the vehicle working condition detection module real-time detects the vehicle working condition, including OFF, ACC, ON working condition without high voltage and high voltage working condition.

5. The method of claim 4, wherein, According to the state of charge value, the lithium battery status is divided into three intervals of power compensation request area, latch area and normal working area, wherein: The state of charge of the latch area is 0%~20%, and the lithium battery status in the latch area stops external power supply to avoid over-discharge; The state of charge of the power compensation request area is 20%~50%, and the lithium battery status in the power compensation request area triggers the power compensation request. The state of charge of the normal working area is 50%~100%, and the lithium battery status in the normal working area is normally operated without special power compensation.

6. The method of claim 5, wherein, The power compensation process comprises: When the state of charge of the lithium battery status is in the power compensation request area, the power compensation control module sends a power compensation request to the vehicle controller every 1 hour to start the power compensation operation; When the state of charge of the lithium battery status is in the latch area, the power compensation control module immediately triggers the lithium battery latch protection to stop the external power supply of the lithium battery to avoid damage caused by over-discharge.

7. The method of claim 6, wherein, The power compensation operation can charge the lithium battery by using other power sources of the vehicle to prevent the state of charge from further decreasing.

8. A low-voltage lithium battery power supplementing and charging device for implementing the method of any one of claims 1 to 7, characterized in that, The method comprises the following steps: A lithium battery status monitoring module for real-time monitoring of the state of charge of the lithium battery; A power compensation control module for controlling the intelligent power compensation process according to the lithium battery status and vehicle working condition; A DCDC voltage regulation module for dynamically adjusting the output voltage of the DCDC according to the charging request voltage of the lithium battery to realize dynamic charging; and A vehicle working condition detection module for detecting the vehicle in OFF, ACC or ON working condition.

9. An electronic device, comprising: The method comprises the following steps: At least one processor; A memory connected in communication with the at least one processor; The memory stores a computer program executable by the at least one processor, and the at least one processor executes the computer program to realize the method of any one of claims 1 to 7.

10. A non-transitory readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed to realize the method of any one of claims 1 to 7.

Images