Battery power calibration system and method, electric vehicle

Abstract

The present application provides a battery power calibration system and method, and an electric vehicle, relating to the technical field of electric vehicles. The system includes a power calibration module and a power management module that are signal-connected; the power calibration module is used to collect battery power-off information or battery non-power-off information of the electric vehicle, and send the battery power-off information or battery non-power-off information to the power management module when the electric vehicle is powered on again; after the electric vehicle is powered on again, the power management module can receive the battery power-off information or battery non-power-off information sent by the power calibration module, and the power management module will recalculate the remaining power of the battery based on the battery power-off information or battery non-power-off information, so as to calibrate the remaining power retained by the power management module when the power was last powered off, so that the electric vehicle can accurately display the current remaining power of the battery through recalibration after the battery is replaced or the battery is left for a long time.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a battery charge calibration system and method, and an electric vehicle. Background Art

[0002] As people's environmental awareness grows, the number of electric vehicles in use is increasing year by year. In the production and manufacturing of electric vehicles, lead-acid batteries are widely used due to their economic and practical advantages. However, electric vehicles equipped with lead-acid batteries are prone to inaccurate display of remaining power. Therefore, electric vehicles are equipped with lead-acid precision power systems to improve the accuracy of the remaining power display.

[0003] Electric vehicles currently using a lead-acid precision power meter lose power when the vehicle is powered off (battery power is not lost) or off (battery power is lost). The lead-acid precision power meter retains the remaining power data during the power outage. However, when the vehicle is powered back on after a battery replacement or after being powered off for an extended period (lead-acid batteries lose power due to discharge), the lead-acid precision power meter displays the remaining power data from the previous time. This data differs significantly from the remaining power of the newly installed or long-standing battery, resulting in inaccurate battery remaining power displayed on the vehicle. Summary of the Invention

[0004] The purpose of this application is to provide a battery power calibration system and method, and an electric vehicle to address the deficiencies in the above-mentioned prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In one aspect of an embodiment of the present application, a battery power calibration system is provided, which is configured in an electric vehicle and includes a power calibration module and a power management module connected by signals;

[0007] The power calibration module is used to collect the battery power-off information or battery non-power-off information of the electric vehicle, and send the battery power-off information or battery non-power-off information to the power management module when the electric vehicle is powered on again;

[0008] The power management module is used to calculate the remaining power of the battery according to the battery power-off information or the battery non-power-off information.

[0009] Optionally, the power management module is configured to measure first battery voltage information of the electric vehicle upon receiving battery power-off information, and calculate the remaining power of the battery based on the first battery voltage information.

[0010] Optionally, the power calibration module is further configured to measure the second battery voltage information when the electric vehicle is powered on again, and send the second battery voltage information to the power management module when the electric vehicle is powered on again;

[0011] The power management module is used to measure the first battery voltage information of the electric vehicle when receiving the battery power-off information and the second battery voltage information, and calculate the remaining power of the battery based on the first battery voltage information and the second battery voltage information.

[0012] Optionally, the power management module is used to compare the difference between the first battery voltage information and the second battery voltage information with a first preset value;

[0013] If the difference is greater than a first preset value, calculating the remaining battery capacity according to an average of the first battery voltage information and the second battery voltage information;

[0014] If the difference is less than the first preset value, the remaining capacity of the battery is calculated according to the first battery voltage information.

[0015] Optionally, the power calibration module is further used to measure the third battery voltage information when the electric vehicle is powered off and the fourth battery voltage information when the electric vehicle is powered on again, and send the third battery voltage information and the fourth battery voltage information to the power management module when the electric vehicle is powered on again;

[0016] The power management module is used to calculate the remaining power of the battery according to the third battery voltage information and the fourth battery voltage information when receiving the battery non-power-off information, the third battery voltage information and the fourth battery voltage information.

[0017] Optionally, the power calibration module is further configured to collect the sleep time of the electric vehicle when the battery is not powered off, the sleep time including the time elapsed from powering off to powering on again of the electric vehicle, and send the sleep time to the power management module when the electric vehicle is powered on again;

[0018] The power management module is used to compare the difference between the third battery voltage information and the fourth battery voltage information with a second preset value;

[0019] If the difference is greater than a second preset value, measuring the first battery voltage information of the electric vehicle, and calculating the remaining power of the battery according to the first battery voltage information;

[0020] If the difference is less than the second preset value, the remaining battery power is calculated according to the sleep time.

[0021] Optionally, the power management module is configured to calculate the sleep power consumption of the electric vehicle according to the sleep time when the difference is less than a second preset value, and calculate the remaining power of the battery according to the sleep power consumption.

[0022] Another aspect of the embodiments of the present application provides an electric vehicle comprising any one of the above-mentioned battery capacity calibration systems.

[0023] Optionally, the electric vehicle further comprises a battery, and the battery is signal-connected to a power calibration module and a power management module of the battery power calibration system respectively.

[0024] Optionally, the electric vehicle further includes a display screen, which is signal-connected to a power management module of the battery power calibration system.

[0025] In another aspect of the embodiments of the present application, a battery charge calibration method is provided, which is applied to an electric vehicle, and the method includes:

[0026] Collecting battery power-off information or battery power-on information of electric vehicles;

[0027] When the electric vehicle is powered on again, the remaining battery capacity is calculated based on the battery power-off information or the battery non-power-off information.

[0028] The beneficial effects of this application include:

[0029] The present application provides a battery power calibration system and method, and an electric vehicle. The system includes a power calibration module and a power management module connected by signals; the power calibration module is used to collect battery power-off information or battery non-power-off information of the electric vehicle, and send the battery power-off information or battery non-power-off information to the power management module when the electric vehicle is powered on again; after the electric vehicle is powered on again, the power management module can receive the battery power-off information or battery non-power-off information sent by the power calibration module, and the power management module will recalculate the remaining power of the battery based on the battery power-off information or battery non-power-off information, so as to calibrate the remaining power retained by the power management module when the power was last powered off, so that the electric vehicle can accurately display the current remaining power of the battery through recalibration after replacing the battery or the battery is left for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic structural diagram of an electric vehicle provided in an embodiment of the present application.

[0032] Icon: 100-battery power calibration system; 110-power management module; 120-power calibration module; 210-battery; 220-display screen. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0035] In the description of this application, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0037] In this application, the electric vehicle is powered off, which means the ACC is powered off. At this time, the battery of the electric vehicle is still powered, the power system, display screen, lights, power management module, etc. of the electric vehicle are powered off, and the power calibration module, alarm, Bluetooth, cloud box, etc. of the electric vehicle are still powered.

[0038] When the electric vehicle is powered on, it means that the ACC is powered on. At this time, the battery of the electric vehicle remains powered, and the power system, display screen, lights, power management module, etc. of the electric vehicle are all powered. The power calibration module, alarm, Bluetooth, cloud box, etc. of the electric vehicle remain powered.

[0039] A battery power outage means that the entire electric vehicle is powered off. At this time, all power-consuming components of the electric vehicle are powered off, including the battery, power system, display screen, lights, power calibration module, power management module, alarm, Bluetooth, cloud box, etc.

[0040] Battery non-disconnection means that the battery of the electric vehicle remains powered. At this time, the electric vehicle may be in ACC power-on or ACC power-off.

[0041] The period between when the ACC is powered off and when the ACC is powered on again is called the dormant stage. When the electric vehicle is in the dormant stage, the battery remains powered.

[0042] In one aspect of the embodiment of the present application, Figure 1 As shown, a battery capacity calibration system 100 is provided, which can be configured in an electric vehicle. The battery capacity calibration system 100 includes a capacity calibration module 120 and a capacity management module 110 (SOC) that are signal-connected. That is, the capacity calibration module 120 can transmit information unidirectionally or bidirectionally with the capacity management module 110. It should be understood that the present application is not limited to a specific method of signal connection. For example, it can be a wired or wireless connection. A wired connection can be connected via a data cable, and a wireless connection can be connected via various communication methods such as Bluetooth and WiFi.

[0043] When the battery 210 remains powered, the power calibration module 120 can collect information about the battery 210 being powered on. When the battery 210 is powered off, the power calibration module 120 can collect information about the battery 210 being powered off. When the electric vehicle is powered on again, the power calibration module 120 sends the collected information about the battery 210 being powered off or powered on to the power management module 110.

[0044] After the electric vehicle is powered on again, the power management module 110 can receive the battery 210 power-off information or the battery 210 non-power-off information sent by the power calibration module 120, and the power management module 110 will recalculate the remaining power of the battery 210 based on the battery 210 power-off information or the battery 210 non-power-off information, so as to calibrate the remaining power retained when the power management module 110 was last powered off, so that the electric vehicle can accurately display the current remaining power of the battery 210 through recalibration after replacing the battery 210 or the battery 210 has been stored for a long time.

[0045] The vehicle is powered off and then powered on again, which may include but is not limited to the following operating conditions: (1) Before leaving the factory, the electric vehicle will use a test power source as the battery 210 for testing. After passing the test, the entire vehicle will be powered off, and the power management module 110 will retain the remaining power of the test power source connected during the test. When the electric vehicle leaves the factory and is delivered to the consumer, it will be equipped with a new battery 210 and then powered on again. At this time, the power management module 110 still retains the remaining power data that matches the test power source, which is significantly different from the remaining power of the newly installed battery 210, resulting in inaccurate remaining power of the battery 210 displayed by the electric vehicle. (2) After long-term use of an electric vehicle, the battery 210 will degrade. When the user replaces the battery 210 with a new one, the old battery 210 will be removed from the electric vehicle first. At this time, the electric vehicle is powered off, and the power management module 110 will retain the remaining power data that matches the old battery 210. Then, the new battery 210 will be installed and the power will be turned on again. At this time, the power management module 110 still retains the remaining power data that matches the old battery 210, which is significantly different from the remaining power of the newly installed battery 210, resulting in inaccurate remaining power of the battery 210 displayed by the electric vehicle.

[0046] Since the electric vehicle is powered off and then back on, it is possible that the battery 210 is being replaced. During this process, the battery 210 is inevitably powered off. When the battery 210 is powered off, both the power management module 110 and the power calibration module 120 are powered off. However, the power calibration module 120 can collect information about the power outage of the battery 210. When the battery 210 is replaced and powered on again, the power management module 110 and the power calibration module 120 are powered on again. At this point, the power calibration module 120 can send the collected information about the power outage of the battery 210 to the power management module 110. When the power management module 110 receives the power-off information of the battery 210, it can perform OCV calibration (open circuit voltage calibration), so that the power management module 110 can measure the first battery voltage information of the current battery 210 carried by the electric vehicle, and then calculate the remaining power of the battery 210 currently carried by the electric vehicle based on the first battery voltage information. When the electric vehicle has a display screen 220, the recalculated remaining power is sent to the display screen 220 for display. In this way, the remaining power information displayed on the display screen 220 can match the actual remaining power of the currently carried battery 210, thereby realizing accurate display of the remaining power after replacing the battery 210.

[0047] When the power management module 110 calculates the remaining power of the battery 210 currently mounted on the electric vehicle according to the first battery voltage information, it can be achieved by using a corresponding curve relationship between the battery 210 voltage and the remaining power value pre-built into the power management module 110 .

[0048] Optionally, to more accurately display the remaining power information after replacing the battery 210, the power calibration module 120 can also be configured to measure the second battery voltage information when the electric vehicle is powered on again. That is, when the electric vehicle is powered on again, the power calibration module 120 can measure the voltage of the battery 210 currently installed in the electric vehicle, and use the measured voltage data as the second battery voltage information. Furthermore, when the electric vehicle is powered on again, the power calibration module 120 sends the battery 210 power-off information and the second battery voltage information to the power management module 110.

[0049] When the power management module 110 receives the battery 210 power-off information and the second battery voltage information, it will first measure the voltage of the battery 210 currently installed in the electric vehicle according to the battery 210 power-off information, and use the measured voltage data as the first battery voltage information. Then, the power management module 110 will calculate the remaining power of the current battery 210 based on the first battery voltage information and the second battery voltage information. Therefore, since the second battery voltage information is introduced, the calculated remaining power can more accurately represent the actual remaining power of the current battery 210.

[0050] Optionally, when the power management module 110 calculates the remaining power of the current battery 210 based on the first battery voltage information and the second battery voltage information, it can accurately calculate by comparing the difference between the first battery voltage information and the second battery voltage information and the first preset value. Specifically: if the difference between the first battery voltage information and the second battery voltage information is greater than the first preset value, the power management module 110 can calculate the average value of the first battery voltage information and the second battery voltage information, and then derive the remaining power based on the average value, thereby more accurately representing the actual remaining power of the current battery 210; if the difference between the first battery voltage information and the second battery voltage information is less than the first preset value, the power management module 110 directly derives the remaining power of the battery 210 based on the first battery voltage information.

[0051] In addition, the electric vehicle may also include ACC power off and then power on again, that is, the electric vehicle power on ACC again after the end of the sleep phase, which may include but not be limited to the following working conditions: (1) Since the battery 210 is not replaced during this sleep phase and remains powered, and as the electric vehicle is used for a long time, the capacity of the battery 210 will decay. Therefore, the deviation between the remaining power data retained by the power management module 110 and the actual remaining power of the battery 210 will gradually increase, resulting in inaccurate remaining power of the battery 210 displayed by the electric vehicle. (2) Since the battery 210 is still powered during the sleep phase of the electric vehicle, and some components of the electric vehicle (such as the power calibration module 120, the alarm, the cloud box, etc.) are still powered, these components will generate sleep power consumption during the sleep phase. Therefore, when the electric vehicle is powered on again after sleep, the remaining power data retained by the power management module 110 will deviate from the actual remaining power of the battery 210, resulting in inaccurate remaining power of the battery 210 displayed by the electric vehicle.

[0052] Because the electric vehicle is powered on again after the ACC system is powered off, battery 210 may be experiencing degradation or dormant power consumption, and battery 210 will remain powered during this process. When the electric vehicle is powered off, the power management module 110 is powered off. At this time, the power calibration module 120 remains powered on and collects battery 210 non-disconnection information and records the battery 210 voltage when the electric vehicle was powered off as third battery voltage information. When the electric vehicle is powered on again, the circuit calibration module records the battery 210 voltage when the electric vehicle was powered on as fourth battery voltage information. The circuit calibration module then transmits the battery 210 non-disconnection information, the third battery voltage information, and the fourth battery voltage information to the power management module 110.

[0053] When the power management module 110 receives the non-power-off information of the battery 210, the third battery voltage information and the fourth battery voltage information, it will first determine whether the battery 210 remains powered during the time period based on the non-power-off information of the battery 210, and then calculate the remaining power of the battery 210 based on the third battery voltage information and the fourth battery voltage information.

[0054] Optionally, when the power management module 110 calculates the remaining capacity of the battery 210 based on the third and fourth battery voltage information, it can accurately calculate the remaining capacity by comparing the difference between the third and fourth battery voltage information with a second preset value. Specifically, if the difference between the third and fourth battery voltage information is greater than the second preset value, it indicates that the capacity of the battery 210 has decayed. In this case, the power management module 110 can directly measure the first battery voltage information of the electric vehicle and then calculate the remaining capacity of the battery 210 based on the first battery voltage information. The power calibration module 120 is further configured to collect the sleep time of the electric vehicle when the battery 210 is powered on. The sleep time includes the time elapsed from the last ACC power-off to the next ACC power-on (i.e., the duration of the sleep phase). When the electric vehicle is powered on again, the sleep time is sent to the power management module 110. If the difference is less than the second preset value, it indicates that the electric vehicle has consumed sleep power during the sleep phase. The power management module 110 can then calculate the sleep power consumption based on the sleep time and then recalculate the remaining capacity of the battery 210 based on the sleep power consumption.

[0055] When the power management module 110 recalculates the remaining power of the battery 210 based on the sleep power consumption, it may subtract the sleep power consumption from the remaining power retained when the power management module 110 was last powered off to obtain the current remaining power of the battery 210 .

[0056] Another aspect of the present application provides an electric vehicle comprising any of the aforementioned battery capacity calibration systems 100. By incorporating the aforementioned battery capacity calibration system 100, the problem of inaccurate remaining power display in the electric vehicle, which may occur when the battery 210 is replaced, or when the battery 210 is degraded or in sleep mode, can be effectively improved. The electric vehicle in this application may include an electric bicycle, an electric moped, an electric motorcycle, and the like.

[0057] Optional, such as Figure 1 As shown, the electric vehicle also includes a battery 210, which can be a lead-acid battery 210. The battery 210 is respectively connected to the power calibration module 120 and the power management module 110 of the battery power calibration system 100 by signal, so that the power calibration module 120 can collect the power on and off information and voltage information of the battery 210, and facilitate the power management module 110 to collect the voltage information of the battery 210.

[0058] Optional, such as Figure 1 As shown, the electric vehicle also includes a display screen 220, which is signal-connected to the power management module 110 of the battery power calibration system 100, so that after the power management module 110 calculates the remaining power of the current battery 210, the information can be sent to the display screen 220 for corresponding display, thereby facilitating user viewing.

[0059] In another aspect of the embodiments of the present application, a battery charge calibration method is provided, which is applied to an electric vehicle, and the method includes:

[0060] S010: Collecting battery power-off information or battery power-on information of the electric vehicle.

[0061] When the battery 210 remains powered, the power calibration module 120 can collect information about the battery 210 being powered on. When the battery 210 is powered off, the power calibration module 120 can collect information about the battery 210 being powered off. When the electric vehicle is powered on again, the power calibration module 120 sends the collected information about the battery 210 being powered off or powered on to the power management module 110.

[0062] S020: When the electric vehicle is powered on again, the remaining power of the battery is calculated according to the battery power-off information or the battery power-on information.

[0063] After the electric vehicle is powered on again, the power management module 110 can receive the battery 210 power-off information or the battery 210 non-power-off information sent by the power calibration module 120, and the power management module 110 will recalculate the remaining power of the battery 210 based on the battery 210 power-off information or the battery 210 non-power-off information, so as to calibrate the remaining power retained when the power management module 110 was last powered off, so that the electric vehicle can accurately display the current remaining power of the battery 210 through recalibration after replacing the battery 210 or the battery 210 has been stored for a long time.

[0064] On this basis, the battery capacity calibration method may further include method steps corresponding to those of the aforementioned battery capacity calibration system, which will not be described in detail here.

[0065] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery capacity calibration system, characterized in that: Applied to electric vehicles, the system includes a power calibration module and a power management module connected by signals; The power calibration module is used to collect battery power-off information or battery non-power-off information of the electric vehicle, and send the battery power-off information or the battery non-power-off information to the power management module when the electric vehicle is powered on again; The power management module is used to calculate the remaining power of the battery according to the battery power-off information or the battery non-power-off information, so as to calibrate the remaining power retained during the power-off; Wherein, under the working condition of replacing the battery, the power calibration module and the power management module are both powered off, but the power calibration module is further used to: collect battery power-off information when the battery is powered off under the working condition of replacing the battery; When the battery is replaced and the power is turned on again, the power management module and the power calibration module are powered on again, and the power calibration module sends the previously collected battery power-off information to the power management module; The power management module is configured to perform open circuit calibration upon receiving the battery power-off information, measure first battery voltage information of the current battery carried by the electric vehicle, and calculate the remaining power of the battery based on the first battery voltage information; The power calibration module is further configured to measure the third battery voltage information when the electric vehicle is powered off and the fourth battery voltage information when the electric vehicle is powered on again, and to send the third battery voltage information and the fourth battery voltage information to the power management module when the electric vehicle is powered on again; The power management module is configured to calculate the remaining power of the battery according to the third battery voltage information and the fourth battery voltage information when receiving the battery non-power-off information, the third battery voltage information and the fourth battery voltage information; The power calibration module is further configured to collect the sleep time of the electric vehicle when the battery is not powered off, the sleep time including the time elapsed from power off to power on again of the electric vehicle, and send the sleep time to the power management module when the electric vehicle is powered on again; The power management module is used to compare the difference between the third battery voltage information and the fourth battery voltage information with a second preset value; If the difference is greater than the second preset value, measuring the first battery voltage information of the electric vehicle, and calculating the remaining power of the battery according to the first battery voltage information; If the difference is smaller than the second preset value, the remaining power of the battery is calculated according to the sleep time.

2. The battery capacity calibration system according to claim 1, wherein: The power calibration module is further configured to measure the second battery voltage information when the electric vehicle is powered on again, and send the second battery voltage information to the power management module when the electric vehicle is powered on again; The power management module is configured to measure the first battery voltage information of the electric vehicle upon receiving the battery power-off information and the second battery voltage information, and calculate the remaining power of the battery based on the first battery voltage information and the second battery voltage information.

3. The battery capacity calibration system according to claim 2, wherein: The power management module is used to compare the difference between the first battery voltage information and the second battery voltage information with a first preset value; If the difference is greater than the first preset value, calculating the remaining capacity of the battery according to the average of the first battery voltage information and the second battery voltage information; If the difference is smaller than the first preset value, the remaining capacity of the battery is calculated according to the first battery voltage information.

4. The battery capacity calibration system according to claim 1, wherein: The power management module is configured to calculate the sleep power consumption of the electric vehicle according to the sleep time when the difference is less than the second preset value, and calculate the remaining power of the battery according to the sleep power consumption.

5. An electric vehicle, characterized in that: The invention comprises a battery capacity calibration system as described in any one of claims 1 to 4.

6. The electric vehicle according to claim 5, wherein: The electric vehicle further comprises a battery, and the battery is respectively connected to a power calibration module and a power management module of the battery power calibration system through signals.

7. A battery capacity calibration method, characterized in that: Applied to the electric vehicle according to any one of claims 5 to 6, the method comprises: Collecting battery power-off information or battery power-on information of the electric vehicle; When the electric vehicle is powered on again, the remaining power of the battery is calculated according to the battery power-off information or the battery non-power-off information.

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