A method for determining a remaining battery level of a vehicle and a vehicle

Abstract

The application discloses a kind of battery residual capacity determination method of vehicle and vehicle.The battery residual capacity determination method of vehicle includes: when controller power-on self-test, first communication information is sent to the charger of vehicle, to obtain second communication information from charger;Wherein, second communication information at least includes the state of charge of the battery of vehicle before controller power-on self-test;If it is determined from second communication information that the battery is charged state, and first residual capacity when battery charging is completed is contained in second communication information, then first residual capacity is used as the starting amount of battery;If it is determined from second communication information that the battery is not charged state, then the starting amount of battery is determined according to historical residual capacity or second residual capacity stored in the memory of vehicle;Wherein, second residual capacity is the amount of controller determined according to the actual voltage of battery.The technical scheme of the application improves the accuracy of the starting amount of battery determined when controller power-on self-test.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery remaining capacity determination, and in particular to a battery remaining capacity determination method for a vehicle and the vehicle. BACKGROUND

[0002] With the rapid rise of new energy technology, the electrification of vehicles is developing faster and faster. As the power source of electric vehicles, the energy storage technology and output of batteries are constantly improving.

[0003] The battery state of charge (SOC), i.e., the remaining capacity, is an important indicator of the battery. Regardless of the type of new energy vehicle, the remaining capacity needs to be accurately determined so that the driver can accurately obtain the remaining capacity of the vehicle and determine the remaining range of the vehicle.

[0004] Electric vehicles based on lead-acid batteries do not have a battery management system and need to use a vehicle controller to calculate the remaining capacity of the battery. The existing controller has a large error when calculating the remaining capacity of the battery, i.e., it cannot accurately determine the remaining capacity of the battery. SUMMARY

[0005] The present application provides a battery remaining capacity determination method for a vehicle and the vehicle to solve the problem that the controller of the vehicle cannot accurately determine the remaining capacity of the battery.

[0006] According to an aspect of the present application, a battery remaining capacity determination method for a vehicle is provided, which is applied to a controller of the vehicle, and the method comprises:

[0007] When the controller is powered on and self-checked, first communication information is sent to a charger of the vehicle to obtain second communication information from the charger, wherein the second communication information at least includes the charging state of the battery of the vehicle before the controller is powered on and self-checked;

[0008] If it is determined from the second communication information that the battery is in a charged state and the first remaining capacity when the battery is fully charged is included in the second communication information, the first remaining capacity is taken as the initial capacity of the battery.

[0009] If it is determined from the second communication information that the battery is in an uncharged state, the initial capacity of the battery is determined according to the historical remaining capacity or the second remaining capacity stored in the memory of the vehicle, wherein the second remaining capacity is the capacity determined by the controller according to the actual voltage of the battery.

[0010] Optionally, the uncharged state includes a first uncharged state and a second uncharged state.

[0011] If it is determined from the second communication information that the battery is in the uncharged state, determining the starting amount of the battery according to a historical residual amount of electricity or a second residual amount of electricity stored in a memory of the vehicle, comprising:

[0012] If it is determined from the second communication information that the battery is in the first uncharged state, taking the historical residual amount of electricity stored in the memory of the vehicle as the starting amount; wherein the first uncharged state is that the battery has not been charged for less than a first preset time period.

[0013] If it is determined from the second communication information that the battery is in the second uncharged state, taking the minimum value between the second residual amount of electricity and the historical residual amount of electricity as the starting amount; wherein the second uncharged state is that the battery has not been charged for greater than or equal to the first preset time period.

[0014] Optionally, after taking the first residual amount of electricity as the starting amount, the method further comprises:

[0015] sending state change information to the charger to cause the charger to update the charging state of the battery to a first uncharged state in response to the state change information.

[0016] Optionally, after the controller performs power-on self-test, the method further comprises:

[0017] If it is determined from the second communication information that the battery is in the charged state, and the first residual amount of electricity is not included in the second communication information, continuing to send the first communication information to the charger until the received second communication information indicates that the battery is in the charged state and the first residual amount of electricity of the battery is included in the second communication information, and taking the first residual amount of electricity as the starting amount of the battery.

[0018] Optionally, after taking the first residual amount of electricity as the starting amount of the battery or determining the starting amount of the battery according to the historical residual amount of electricity or the second residual amount of electricity stored in the memory of the vehicle, the method further comprises:

[0019] periodically determining an actual residual amount of electricity of the battery after the controller completes power-on self-test;

[0020] periodically sending third communication information to the charger; wherein the third communication information includes the actual residual amount of electricity of the battery.

[0021] Optionally, after sending the first communication information to the charger of the vehicle, the method further comprises:

[0022] If the first communication information is received, the second communication information is sent to the controller of the vehicle, so that the controller determines the starting electric quantity of the battery according to the first remaining electric quantity in the second communication information if the battery is in the charged state and the first remaining electric quantity is contained in the second communication information, or according to the historical remaining electric quantity or the second remaining electric quantity stored in the memory of the vehicle if the battery is in the uncharged state.

[0023] According to another aspect of the present application, a battery remaining electric quantity determination method of a vehicle is provided, which is applied to a charger of the vehicle; the method comprises:

[0024] If the first communication information is received, the second communication information is sent to the controller of the vehicle, so that the controller determines the starting electric quantity of the battery according to the first remaining electric quantity in the second communication information if the battery is in the charged state and the first remaining electric quantity is contained in the second communication information, or according to the historical remaining electric quantity or the second remaining electric quantity stored in the memory of the vehicle if the battery is in the uncharged state.

[0025] The second remaining electric quantity is determined by the controller according to the actual voltage of the battery; and the second communication information at least comprises the charging state of the battery of the vehicle before the power-on self-test of the controller.

[0026] Optionally, if the first communication information is received, the method further comprises:

[0027] If the battery is being charged, the second communication information containing the charging state of the battery in the charged state is sent to the controller until the charging is completed, the first remaining electric quantity of the battery is determined, and the second communication information containing the charging state of the battery in the charged state and containing the first remaining electric quantity is sent to the controller, so that the controller takes the first remaining electric quantity as the starting electric quantity of the battery.

[0028] Optionally, after the second communication information is sent to the controller, the method further comprises:

[0029] After the third communication information sent by the controller is received, the actual remaining electric quantity of the battery is determined according to the third communication information; and the third communication information comprises the actual remaining electric quantity of the battery.

[0030] Optionally, after the second communication information is sent to the controller, the method further comprises:

[0031] If the time length for which the third communication information is not received by the controller reaches a third preset time length, it is determined that the controller is in the offline state.

[0032] After determining that the controller is in the offline state, if the battery is charged, after the charging is completed, the charging state of the battery is determined to be the charged state, and the first remaining power of the battery is determined;

[0033] After determining that the controller is in the offline state, when the first communication information is received, if the duration of not charging the battery is less than a first preset duration, the charging state of the battery is determined to be a first uncharged state;

[0034] After determining that the controller is in the offline state, when the first communication information is received, if the duration of not charging the battery is greater than or equal to the first preset duration, the charging state of the battery is determined to be a second uncharged state.

[0035] Optionally, after sending the second communication information to the controller, the method further comprises:

[0036] After receiving the state change information sent by the controller, the charging state of the battery is updated to the first uncharged state.

[0037] According to another aspect of the present application, a vehicle is provided, comprising a battery, a controller and a charger;

[0038] The controller is connected with the charger, and the controller is configured to send first communication information to the charger of the vehicle when the controller is powered on for self-checking, to obtain second communication information from the charger; if it is determined from the second communication information that the battery is in a charged state, and the first remaining power of the battery when the charging is completed is included in the second communication information, the first remaining power in the second communication information is taken as the starting power of the battery; if it is determined from the second communication information that the battery is in an uncharged state, the starting power of the battery is determined according to the historical remaining power or the second remaining power stored in the memory of the vehicle; wherein the second communication information at least includes the charging state of the battery of the vehicle before the controller is powered on for self-checking; wherein the second remaining power is the power determined by the controller according to the actual voltage of the battery;

[0039] The charger is connected with the battery, and the charger is configured to charge the battery according to the power of an external power source; the charger is further configured to send second communication information to the controller of the vehicle when the first communication information of the controller is received.

[0040] The technical scheme of the embodiment of the application is that when the controller is powered on and self-checked, first communication information is sent to the charger of the vehicle to obtain second communication information from the charger, if it is determined from the second communication information that the battery is in a charged state and the first residual capacity in the second communication information contains the first residual capacity when the battery is fully charged, the first residual capacity contained in the second communication information is taken as the starting capacity of the battery, and if it is determined from the second communication information that the battery is in an uncharged state, the starting capacity of the battery is determined according to the historical residual capacity or the second residual capacity stored in the memory of the vehicle. Since the first residual capacity is determined by the charger, if the battery of the vehicle is charged and the charging is completed during the power-off process of the controller, the first residual capacity determined by the charger can be taken as the starting capacity after the controller is powered on. The problem that the starting capacity is large when the controller still calculates the residual capacity of the battery as the starting capacity of the battery according to the voltage of the battery after the battery is charged during the power-off process of the controller can be avoided. The problem that the starting capacity is small when the controller still calculates the residual capacity of the battery as the starting capacity of the battery according to the voltage of the battery after the battery just experiences a large load working condition can be avoided. Therefore, the vehicle can display an accurate starting capacity, and the controller can determine the actual residual capacity of the battery when the vehicle is running according to the accurate starting capacity, and the accuracy of the determination of the residual capacity of the battery is improved.

[0041] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the application, nor is it used to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0043] Figure 1 is a flowchart of a battery residual capacity determination method of a vehicle provided by an embodiment of the application;

[0044] Figure 2 is a flowchart of another battery residual capacity determination method of a vehicle provided by an embodiment of the application;

[0045] Figure 3 is a flowchart of still another battery residual capacity determination method of a vehicle provided by an embodiment of the application;

[0046] Figure 4is a flow chart of another battery remaining capacity determination method of a vehicle provided by an embodiment of the present application;

[0047] Figure 5 is a flow chart of another battery remaining capacity determination method of a vehicle provided by an embodiment of the present application;

[0048] Figure 6 is a circuit structure schematic diagram of a vehicle provided by an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the 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 the other embodiments obtained by the person of ordinary skill in the art without making creative labor should belong to the protection scope of the present application.

[0050] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0051] As mentioned in the background, the existing controller has a problem of large error when calculating the remaining battery power, that is, the remaining battery power cannot be accurately determined. The inventor found that the cause of this problem is that in the related art, the starting power of the battery when the vehicle starts is determined according to the voltage of the battery and the discharge curve. However, when the controller is powered on, the voltage of the battery (especially lead-acid battery) cannot feedback the real remaining power. For example, when the battery has just experienced a heavy load working condition, even if the battery is not fed, the voltage of the battery will be pulled down to a lower voltage, so that the obtained battery voltage is low, resulting in that the calculated remaining battery power is low, that is, the starting power is low. Or, when the controller is powered on, the battery has just experienced charging, so that the voltage of the battery will be high, resulting in that the calculated remaining battery power is high, that is, the starting power is high. If the calculated remaining battery power is large, it may cause the battery to be over-discharged, affecting the service life of the battery, and even causing irreversible loss. If the calculated remaining battery power is small, it affects the vehicle endurance and the driving experience.

[0052] To solve the above technical problems, the embodiment of the present application provides a battery remaining power determination method of a vehicle, which is applied to a controller of the vehicle, that is, executed by the controller of the vehicle. The controller of the vehicle is a controller for controlling the operation of the motor of the vehicle. Figure 1 It is a flow chart of the battery remaining power determination method of the vehicle provided by the embodiment of the present application, referring to Figure 1 The battery remaining power determination method of the vehicle comprises:

[0053] S101, when the controller is powered on and self-checked, first communication information is sent to the charger of the vehicle to obtain second communication information from the charger; wherein the second communication information at least includes the charging state of the battery of the vehicle before the controller is powered on and self-checked.

[0054] The first communication information is a request message sent by the controller to the charger, which is used to request the charger to send the charging state of the battery to the controller.

[0055] The charger of the vehicle is connected with the battery, and the charger can charge the battery by using the power of an external power source (for example, a charging pile). The charger can include a charging circuit and a charging controller. The charging circuit charges the battery by using the power of the external power source. The charging controller can control the charging circuit, thereby controlling the parameters (charging voltage, charging current, and charging power, etc.) of the charging. The charging controller can also calculate the remaining power of the battery. The charger can determine the charging state of the battery before the controller is powered on. For example, during the controller power-off stage (i.e., from the last power-off of the controller to the power-on self-checking before the present power-on), if the charger charges the battery, it is determined that the charging state of the battery is the charged state. For example, during the controller power-off stage (i.e., from the last power-off of the controller to the power-on self-checking before the present power-on), if the charger does not charge the battery, it is determined that the charging state of the battery is the uncharged state.

[0056] Specifically, when the controller is powered on for self-checking, the controller sends first communication information to the charger. After receiving the first communication information, the charger answers the controller and sends second communication information to the charger. The second communication information includes the charging state of the battery of the vehicle before the controller is powered on for self-checking, so as to facilitate the controller to determine the initial power of the battery according to the charging state of the battery. The initial power of the battery is the remaining power of the battery when the vehicle is powered on.

[0057] S102, if it is determined from the second communication information that the battery is in the charged state, and the first remaining power when the battery is fully charged is included in the second communication information, the first remaining power is taken as the initial power of the battery.

[0058] Specifically, if the charger charges the battery during the controller power-off stage, and the charging is completed when the controller is powered on, the charger can calculate the first remaining power of the battery when the charging is completed after the charging is completed. For example, the charger can obtain the charging current in real time during the charging, and determine the first remaining power of the battery when the charging is completed by using the ampere-hour integration method. Since the charger can collect the parameters (current or voltage, etc.) of the battery in real time during the charging, the first remaining power determined by the charger is closer to the real remaining power of the battery.

[0059] The controller obtains the charging status of the battery from the second communication information. If the battery is in a charged state, that is, the charger has charged the battery and charging has been completed between the last time the controller was powered off and the current power-on self-test, the controller uses the first remaining power sent by the charger as the starting power of the battery. In this way, it can avoid the problem that after the battery is charged when the controller is powered off, the collected battery voltage is too high, and the controller still calculates the battery remaining power based on the collected battery voltage as the starting power of the battery, resulting in the determined starting power being too high. It can also avoid the problem that the battery has just experienced a heavy load condition, resulting in the collected battery voltage being too low, and the controller still calculates the battery remaining power based on the collected battery voltage as the starting power of the battery, resulting in the determined starting power being too low. This improves the accuracy of the starting power displayed when the vehicle is started, and makes it easier for the controller to determine the actual remaining power of the battery when the vehicle is running based on the accurate starting power.

[0060] S103. If the battery is determined to be in an uncharged state from the second communication information, the starting power of the battery is determined based on the historical remaining power or the second remaining power stored in the vehicle's memory; wherein the second remaining power is the power determined by the controller based on the actual voltage of the battery.

[0061] The historical remaining power is the actual remaining power of the battery stored in the vehicle's memory when the controller loses power. The memory may include a flash memory.

[0062] Specifically, the controller obtains the battery's charge status from the second communication information. If the battery is uncharged, meaning the charger has not been charging the battery since the controller was powered off (i.e., from the last time the controller was powered off to the current power-on self-test), the controller can determine the starting charge based on the historical remaining charge stored in the vehicle's memory. Alternatively, the controller can obtain the battery's actual voltage, determine the second remaining charge based on the actual voltage and a preset relationship, and determine the starting charge based on either the historical remaining charge or the second remaining charge. The preset relationship is the relationship between the actual battery voltage and the remaining charge, and can be provided by the battery manufacturer or predetermined based on simulation or experimentation.

[0063] After determining the starting power of the battery, the starting power of the battery can be displayed. For example, the controller sends the starting power to the vehicle's instrument, so that the instrument displays the starting power, which is convenient for the user to obtain the starting power of the vehicle battery when starting the vehicle.

[0064] In some embodiments, after determining the initial electric quantity of the battery, the actual residual electric quantity of the battery is determined according to the initial electric quantity and the electric parameter of the battery after the power-on self-test of the controller is completed. The electric parameter of the battery can include the actual voltage or the actual current of the battery, etc. For example, in the first electric quantity determination period, the controller can obtain the actual voltage of the battery, determine the discharge electric quantity of the battery according to the actual voltage of the battery and the discharge curve of the battery, and determine the actual residual electric quantity of the battery in the first electric quantity determination period by subtracting the discharge electric quantity of the first electric quantity determination period from the initial electric quantity. In the mth electric quantity determination period, the controller can obtain the actual voltage of the battery, determine the discharge electric quantity of the battery according to the actual voltage of the battery and the discharge curve of the battery, and determine the actual residual electric quantity of the battery in the mth electric quantity determination period by subtracting the discharge electric quantity of the mth electric quantity determination period from the actual residual electric quantity determined in the (m-1)th electric quantity determination period. m is an integer greater than 1. The discharge curve of the battery is the corresponding relationship curve between the voltage (terminal voltage) of the battery and the discharge electric quantity of the battery, which can be provided by the battery manufacturer or determined in advance through simulation or experiment, and is not limited herein. Alternatively, the controller obtains the actual current of the battery, determines the electric quantity released by the battery according to the ampere-hour integration method, and then determines the residual electric quantity of the battery according to the initial electric quantity.

[0065] The technical scheme of the embodiment of the application, when the controller is powered on for self-test, sends first communication information to the charger of the vehicle to obtain second communication information from the charger. If it is determined from the second communication information that the battery is in a charged state and the first residual electric quantity when the charging of the battery is completed is included in the second communication information, the first residual electric quantity included in the second communication information is taken as the initial electric quantity of the battery. If it is determined from the second communication information that the battery is in an uncharged state, the initial electric quantity of the battery is determined according to the historical residual electric quantity or the second residual electric quantity stored in the memory of the vehicle. Since the first residual electric quantity is determined by the charger, if the battery of the vehicle is charged and the charging is completed during the power-off process of the controller, the first residual electric quantity determined by the charger can be taken as the initial electric quantity after the controller is powered on. This can avoid the problem that when the battery is charged during the power-off process of the controller, the voltage of the battery collected is large, and the residual electric quantity of the battery is still calculated according to the voltage of the battery to determine the initial electric quantity, resulting in that the determined initial electric quantity is large. Also, this can avoid the problem that when the battery has just experienced a large load working condition, the voltage of the battery collected is small, and the residual electric quantity of the battery is still calculated according to the voltage of the battery to determine the initial electric quantity, resulting in that the determined initial electric quantity is small. Therefore, the vehicle can display an accurate initial electric quantity, and the controller can determine the actual residual electric quantity of the battery during the running of the vehicle according to the accurate initial electric quantity, thereby improving the accuracy of the determination of the residual electric quantity of the battery.

[0066] On the basis of the above technical solutions, optionally, the uncharged state includes a first uncharged state and a second uncharged state.

[0067] Figure 2 is another flowchart of a method for determining a remaining battery capacity of a vehicle provided by an embodiment of the application. Optionally, referring to Figure 2 , the method for determining the remaining battery capacity of the vehicle includes:

[0068] S201, when the controller is powered on for self-checking, first communication information is sent to a charger of the vehicle to obtain second communication information from the charger; wherein the second communication information at least includes a charging state of the battery of the vehicle before the controller is powered on for self-checking.

[0069] S202, if it is determined from the second communication information that the battery is in a charged state, and the second communication information contains a first remaining battery capacity at the time when the battery charging is completed, the first remaining battery capacity is taken as a starting battery capacity.

[0070] S203, if it is determined from the second communication information that the battery is in a first uncharged state, a historical remaining battery capacity stored in a memory of the vehicle is taken as the starting battery capacity; wherein the first uncharged state is a state in which the battery is uncharged for a time period less than a first preset time period.

[0071] wherein the time period in which the battery is uncharged is less than the first preset time period, i.e., the time period in which the battery is uncharged from the time when the controller is powered off to the time when the controller is powered on this time.

[0072] Specifically, the charger can time the time period in which the battery is uncharged after the controller is powered off, and if the time period in which the battery is uncharged is less than the first preset time period from the time when the controller is powered off to the time when the controller is powered on this time, the charger determines that the battery is in the first uncharged state, and the second communication information sent by the charger contains the charging state of the battery as the first uncharged state.

[0073] When it is determined that the battery is in the first uncharged state, it indicates that the battery is uncharged for a relatively short time period, the battery loses a relatively small amount of power when it is left uncharged, and the historical remaining battery capacity stored in the memory of the vehicle is close to or equal to the true remaining battery capacity of the battery, so the historical remaining battery capacity stored in the memory can be taken as the starting battery capacity. In this way, the starting battery capacity determined when the controller is powered on can be close to or equal to the true remaining battery capacity of the battery, thereby improving the accuracy of the determination of the remaining battery capacity. Moreover, the problem that the calculated remaining battery capacity is greatly deviated due to the voltage of the battery being too large or too small can be avoided.

[0074] S204, if it is determined from the second communication information that the battery is in a second uncharged state, the minimum value between the second remaining battery capacity and the historical remaining battery capacity is taken as the starting battery capacity; wherein the second uncharged state is a state in which the battery is uncharged for a time period greater than or equal to the first preset time period.

[0075] Specifically, if the battery is in the uncharged state, and the duration of the uncharged state of the battery is greater than or equal to the first preset duration from the controller power-off stage to the current power-on of the controller, it is determined that the battery is in the second uncharged state. When the controller determines from the second communication information that the battery is in the second uncharged state, it indicates that the battery has been uncharged for a long time during the controller power-off stage, and the battery has lost a large amount of power during the standby state. Therefore, the difference between the historical remaining power in the memory and the actual remaining power of the battery can be large. The controller obtains the actual voltage of the battery, and determines the remaining power of the battery according to the preset corresponding relationship between the actual voltage of the battery and the preset corresponding relationship, that is, the second remaining power. Since the battery has been uncharged for a long time, that is, the battery has been in a standby state for a long time, and a large amount of power has been lost during the standby state, the second remaining power and the minimum value of the historical remaining power are used as the starting power of the battery, so that the determined starting power is closer to the actual remaining power of the battery, thereby making the starting power displayed by the vehicle more accurate, facilitating the controller to determine the actual remaining power of the battery during vehicle operation according to the accurate starting power, and improving the accuracy of the determination of the remaining power of the battery.

[0076] On the basis of the above technical solutions, Figure 3 is a flowchart of another battery remaining power determination method of a vehicle provided by an embodiment of the present application. Optionally, reference can be made to Figure 3 The battery remaining power determination method of the vehicle comprises the following steps.

[0077] S301, when the controller is powered on and self-checked, first communication information is sent to the charger of the vehicle to obtain second communication information from the charger; wherein the second communication information at least includes the charging state of the battery of the vehicle before the controller is powered on and self-checked.

[0078] S302, if it is determined from the second communication information that the battery is in the charged state, and the first remaining power when the battery is fully charged is included in the second communication information, the first remaining power is used as the starting power of the battery.

[0079] S303, state change information is sent to the charger to update the charging state of the battery to the first uncharged state in response to the state change information.

[0080] Specifically, after the first remaining power is used as the starting power of the battery, the controller sends state change information to the charger, and the charger updates the charging state to the first uncharged state. After the controller is powered off again, if the charger charges the battery, the charger changes the charging state of the battery to the charged state again, and if the battery is not charged and the duration of the uncharged state reaches the first preset duration, the charger changes the charging state of the battery to the second uncharged state again. In this way, the charger can update the charging state of the battery in a timely manner.

[0081] Optionally, the notification information that the first residual capacity has been received by the charger can be sent to the charger at the same time as the state change information is sent to the charger. In this way, the charger can be informed of the state of the controller in a timely manner.

[0082] In S304, if it is determined from the second communication information that the battery is in the first uncharged state, the historical residual capacity stored in the memory of the vehicle is taken as the starting capacity; wherein the first uncharged state is a state in which the battery has not been charged for less than a first preset time length.

[0083] In S305, if it is determined from the second communication information that the battery is in the second uncharged state, the minimum value between the second residual capacity and the historical residual capacity is taken as the starting capacity; wherein the second uncharged state is a state in which the battery has not been charged for greater than or equal to the first preset time length.

[0084] On the basis of the above technical solutions, optionally, when the controller is powered on and self-checked, after the first communication information is sent to the charger of the vehicle, the battery residual capacity determination method of the vehicle further comprises:

[0085] If it is determined from the second communication information that the battery is in the charged state, and the first residual capacity is not included in the second communication information, the first communication information is continuously sent to the charger until the second communication information received by the charger indicates that the battery is in the charged state and the first residual capacity of the battery is included in the second communication information, and the first residual capacity is taken as the starting capacity of the battery.

[0086] Specifically, when the controller is powered on and self-checked, the controller sends the first communication information to the charger. When the charger receives the first communication information, if the charger is charging the battery, the charger sends the second communication information including the charged state to the controller, but does not send the first residual capacity to the controller. The second communication information received by the controller can only determine that the battery is in the charged state, and cannot determine the first residual capacity. Therefore, the controller continues to send the first communication information to the charger until the charging is completed. After the charging is completed, the charger determines the first residual capacity of the battery according to the voltage of the battery after the charging is completed, and sends the second communication information including the charged state and the first residual capacity to the controller. In this way, the second communication information received by the controller indicates that the battery is in the charged state and the first residual capacity of the battery is included in the second communication information, so that the first residual capacity can be taken as the starting capacity. In this way, the problem that the voltage of the battery is too large after the battery is charged when the controller is powered off can be avoided, and the starting capacity determined by the controller according to the voltage of the battery is too large. The accuracy of the starting capacity determination is improved.

[0087] The first residual capacity of the battery can be determined by using an ampere-hour integration method, or can be determined by using other methods, such as a charging curve provided by a manufacturer, and the present application is not limited in this regard.

[0088] On the basis of the above technical solutions, after the first residual capacity is taken as the starting capacity of the battery or the starting capacity of the battery is determined according to the historical residual capacity or the second residual capacity stored in the memory of the vehicle, the battery residual capacity determination method of the vehicle further includes:

[0089] After the controller completes the power-on self-test, the actual residual capacity of the battery is determined periodically;

[0090] The third communication information is periodically sent to the charger; wherein the third communication information includes the actual residual capacity of the battery.

[0091] The actual residual capacity of the battery is determined periodically, that is, the actual residual capacity of the battery is determined once every first interval. The third communication information is periodically sent to the charger, that is, the third communication information is sent to the charger once every second interval. The first interval and the second interval can be the same or different. When the third communication information is sent, the third communication information includes the latest determined actual residual capacity, that is, the actual residual capacity determined in the capacity determination period closest to the current third communication information sending period.

[0092] Specifically, after the controller completes the power-on self-test, the controller periodically determines the actual residual capacity of the battery, which can be determined by using the correspondence between the voltage of the battery and the residual capacity, or can be determined by using the ampere-hour integration method, and the present application is not limited in this regard. And the controller can periodically send the third communication information to the charger, so that the charger can periodically obtain the actual residual capacity of the battery. In this way, the actual residual capacity of the battery displayed by the instrument of the vehicle is consistent with the actual residual capacity displayed by the charger, thereby improving the accuracy of the actual residual capacity displayed by the charger, and making the actual residual capacity of the battery read by the user from the instrument and the charger consistent, thereby improving the user experience.

[0093] In this way, after the charger charges the battery during the power-off stage of the controller, the controller can use the first residual capacity determined by the charger as the starting capacity of the battery. During the operation of the vehicle, the controller can send the actual residual capacity determined by it to the charger, so that the charger and the controller can each take advantage of their strengths and accurately obtain the residual capacity.

[0094] On the basis of the above technical solutions, after the first communication information is sent to the charger of the vehicle, the battery residual capacity determination method of the vehicle further includes:

[0095] If the first communication information is not received after the time period of sending the first communication information reaches the second preset time period, a fault prompt information is sent, and the second remaining capacity of the battery is determined according to the actual voltage of the battery, and the second remaining capacity is taken as the starting capacity.

[0096] Specifically, if the first communication information is not received after the time period of sending the first communication information reaches the second preset time period, it is determined that the communication with the charger is lost, and the fault prompt information is sent. Moreover, the controller determines the remaining capacity of the battery according to the actual voltage of the battery and the preset corresponding relationship, that is, the second remaining capacity, and the second remaining capacity is taken as the starting capacity. In this way, when the controller and the charger cannot communicate in time, the starting capacity of the battery can be determined by acquiring the actual voltage of the battery, and long waiting time is avoided.

[0097] On the basis of the above technical solutions, optionally, after the controller power-on self-test is completed and the actual remaining capacity of the battery is determined according to the starting capacity and the electrical parameter of the battery, the battery remaining capacity determination method of the vehicle further includes:

[0098] When the controller is powered off, the actual remaining capacity at the time of power-off is stored in the storage.

[0099] Specifically, the storage can be a flash memory, which has the function of not losing data when powered off. Therefore, when the controller is powered off, the controller stores the actual remaining capacity at the time of power-off in the storage, that is, as the historical remaining capacity when the controller is powered on subsequently, so that the controller can determine the starting capacity of the battery according to the historical remaining capacity in the storage when the controller is powered on again.

[0100] The embodiment of the application also provides a battery remaining capacity determination method of a vehicle, which is applied to a charger of the vehicle, that is, is executed by the charger. The battery remaining capacity determination method of the vehicle includes:

[0101] When the first communication information of the controller of the vehicle is received, the second communication information is sent to the controller, so that the controller takes the first remaining capacity in the second communication information as the starting capacity of the battery if it is determined from the second communication information that the battery of the vehicle is in a charged state and the first remaining capacity at the time of completion of charging of the battery is included in the second communication information, and determines the starting capacity of the battery according to the historical remaining capacity or the second remaining capacity stored in the storage of the vehicle if it is determined from the second communication information that the battery is in an uncharged state.

[0102] The second remaining capacity is the capacity determined by the controller according to the actual voltage of the battery; and the second communication information at least includes the charging state of the battery of the vehicle before the controller power-on self-test.

[0103] Specifically, when the controller is powered on for self-checking, the controller sends first communication information to the charger, and the charger sends second communication information to the charger in response to the first communication information, the second communication information including the charging state of the battery before the controller is powered on for self-checking.

[0104] If the charger charges the battery during the controller power-off stage and the charging is completed when the controller is powered on, the charger can calculate the first residual capacity of the battery when the charging is completed after the charging is completed. For example, the charger can obtain the charging current in real time during charging, and determine the first residual capacity of the battery when the charging is completed by using the ampere-hour integration method.

[0105] The controller obtains the charging state of the battery from the second communication information. If the battery is in a charged state, i.e., the charger charges the battery and the charging is completed before the controller is powered on for self-checking from the last power-off to the present power-on, the controller takes the first residual capacity sent by the charger as the starting capacity of the battery. In this way, the problem that the determined starting capacity is large when the battery is charged during the controller power-off and the controller still calculates the residual capacity of the battery as the starting capacity of the battery according to the voltage of the battery can be avoided, thereby improving the accuracy of the starting capacity displayed when the vehicle is started, and facilitating the controller to determine the actual residual capacity of the battery when the vehicle is running according to the accurate starting capacity.

[0106] If the battery is in an uncharged state, i.e., the charger does not charge the battery during the controller power-off stage (i.e., from the last power-off to the present power-on for self-checking), the starting capacity can be determined according to the historical residual capacity stored in the memory of the vehicle. Alternatively, the controller can obtain the actual voltage of the battery, determine the second residual capacity of the battery according to the actual voltage of the battery and a preset corresponding relationship, and determine the starting capacity of the battery according to the historical residual capacity or the second residual capacity. The preset corresponding relationship is the corresponding relationship between the actual voltage of the battery and the residual capacity, which can be provided by the battery manufacturer or determined in advance according to simulation or experiment.

[0107] After the starting capacity of the battery is determined, the starting capacity of the battery can be displayed, e.g., the controller sends the starting capacity to the instrument of the vehicle, so that the instrument displays the starting capacity, facilitating the user to obtain the starting capacity of the battery of the vehicle when starting the vehicle. Moreover, after the starting capacity of the battery is determined, the actual residual capacity of the battery can be determined according to the starting capacity and the electrical parameters of the battery after the controller is powered on for self-checking is completed.

[0108] On the basis of the above technical solutions, optionally, when the first communication information of the controller of the vehicle is received, the method for determining the residual capacity of the battery of the vehicle further includes:

[0109] If the battery is being charged, the second communication information containing the charged state of the battery is sent to the controller until the charging is completed, the first remaining capacity of the battery is determined, and the second communication information containing the charged state of the battery and the first remaining capacity is sent to the controller, so that the controller takes the first remaining capacity as the starting capacity of the battery.

[0110] Specifically, when the charger receives the first communication information, if the charger is charging the battery, the charger sends the second communication information containing the charged state to the controller, but does not send the first remaining capacity to the controller. Then the second communication information received by the controller can only determine that the state of the battery is the charged state, and cannot determine the first remaining capacity. Then the controller continues to send the first communication information to the charger, until the charging is completed, the charger determines the first remaining capacity of the battery according to the voltage after the battery charging is completed, and sends the second communication information containing the charged state and the first remaining capacity to the controller. So that the second communication information received by the controller contains the charged state of the battery, and the first remaining capacity of the battery is contained in the second communication information, so that the first remaining capacity can be taken as the starting capacity. In this way, when the controller is powered off, the voltage of the battery is large after the battery is charged, and the controller still calculates the remaining capacity of the battery as the starting capacity of the battery according to the voltage of the battery, which can avoid the problem that the determined starting capacity is large, and improves the accuracy of the determination of the starting capacity.

[0111] On the basis of the above technical solutions, Figure 4 is a flowchart of another battery remaining capacity determination method of a vehicle provided by an embodiment of the application. Optionally, reference can be made to Figure 4 The battery remaining capacity determination method of the vehicle comprises the following steps.

[0112] S401, when receiving the first communication information of the controller of the vehicle, the second communication information is sent to the controller, so that if the controller determines from the second communication information that the battery of the vehicle is in the charged state, and the first remaining capacity at the completion of charging of the battery is contained in the second communication information, the first remaining capacity in the second communication information is taken as the starting capacity of the battery; if it is determined from the second communication information that the battery is in the uncharged state, the starting capacity of the battery is determined according to the historical remaining capacity or the second remaining capacity stored in the memory of the vehicle.

[0113] The second remaining capacity is the capacity determined by the controller according to the actual voltage of the battery; the second communication information at least includes the charging state of the battery of the vehicle before the power-on self-test of the controller.

[0114] S402, after receiving the third communication information sent by the controller, the actual remaining capacity of the battery is determined according to the third communication information; the third communication information includes the actual remaining capacity of the battery.

[0115] Specifically, after the controller completes the power-on self-test, the controller periodically determines the actual remaining power of the battery, and the controller can periodically send the third communication information to the charger, so that the charger can periodically determine the actual remaining power of the battery according to the third communication information. In this way, the actual remaining power of the battery displayed by the instrument of the vehicle is consistent with the actual remaining power displayed by the charger, thereby improving the accuracy of the actual remaining power displayed by the charger, and making the actual remaining power of the battery read by the user from the instrument and the charger consistent, thereby improving the user experience.

[0116] On the basis of the above technical solutions, Figure 5 is a flowchart of another battery remaining power determination method of a vehicle provided by an embodiment of the present application, which can optionally refer to Figure 5 The battery remaining power determination method of the vehicle comprises:

[0117] S501, upon receiving the first communication information of the controller of the vehicle, sending the second communication information to the controller, so that the controller, if determining from the second communication information that the battery of the vehicle is in the charged state and the first remaining power at the completion of charging of the battery is contained in the second communication information, takes the first remaining power in the second communication information as the initial power of the battery; if determining from the second communication information that the battery is in the uncharged state, determining the initial power of the battery according to the historical remaining power or the second remaining power stored in the memory of the vehicle.

[0118] The second remaining power is the power determined by the controller according to the actual voltage of the battery; and the second communication information at least includes the charging state of the battery of the vehicle before the power-on self-test of the controller.

[0119] S502, if the time length during which the third communication information sent by the controller is not received reaches a third preset time length, determining that the controller is in the offline state.

[0120] The third preset time length is greater than the cycle time length of the third communication information sent by the controller.

[0121] Specifically, after the controller completes the power-on, the controller will periodically send the third communication information to the charger, and if the time length during which the third communication information sent by the controller is not received reaches a third preset time length, it indicates that the controller is powered off, and then the charger determines that the controller is in the offline state.

[0122] S503, after determining that the controller is in the offline state, if the battery is charged, determining the charging state of the battery as the charged state and determining the first remaining power after the charging is completed.

[0123] Specifically, after the charger determines that the controller is in the offline state, if the charger charges the battery, the charger updates the charging state of the battery to the charged state after the charging is completed. Moreover, the charger determines the first residual capacity of the battery according to the voltage and charging capacity correspondence relationship of the battery after the charging is completed, wherein the charging capacity correspondence relationship is the correspondence relationship between the voltage and the residual capacity of the battery during the charging of the battery. Moreover, the charger stores the charging state and the first residual capacity of the battery, so as to be sent to the controller after the controller is powered on again.

[0124] S504, after determining that the controller is in the offline state, if the duration of not charging the battery is less than the first preset duration when the first communication information is received, it is determined that the charging state of the battery is the first uncharged state.

[0125] The duration of not charging the battery is the duration of not charging the battery during the power-off stage of the controller, that is, the duration of not charging the battery between the controller being offline and being powered on again.

[0126] Specifically, the charger starts timing when it is determined that the controller is in the offline state. When the controller is powered on again after the controller is determined to be in the offline state, if the timing duration of the charger is less than the first preset duration, it indicates that the duration of not charging the battery during the power-off stage of the controller is less than the first preset duration, and the charging state of the battery is determined to be the first uncharged state.

[0127] S505, after determining that the controller is in the offline state, if the duration of not charging the battery is greater than or equal to the first preset duration when the first communication information is received, it is determined that the charging state of the battery is the second uncharged state.

[0128] The duration of not charging the battery is the duration of not charging the battery during the power-off stage of the controller, that is, the duration of not charging the battery between the controller being offline and being powered on again.

[0129] Specifically, the charger starts timing when it is determined that the controller is in the offline state. When the controller is powered on again after the controller is determined to be in the offline state, if the timing duration of the charger is greater than or equal to the first preset duration, it indicates that the duration of not charging the battery during the power-off stage of the controller is greater than or equal to the first preset duration, and the charging state of the battery is determined to be the second uncharged state.

[0130] It should be noted that steps S502-S505 can also be located before step S501, that is, the charging state of the battery and the first residual capacity obtained when the controller is powered on this time are determined by the charger after the controller is powered off last time. Steps S502-S505 can also be located after step S501, that is, the charging state of the battery and the first residual capacity obtained after the controller is powered on and self-checked next time are determined by the charger after the controller is powered off this time, which is not limited here.

[0131] On the basis of the above technical solutions, optionally, after the second communication information is sent to the controller, the method further comprises:

[0132] After receiving the state change information sent by the controller, the charging state of the battery is updated to the first uncharged state.

[0133] Specifically, after the controller takes the first residual capacity as the starting capacity of the battery, the controller sends state change information to the charger, and the charger updates the charging state to the first uncharged state. After the controller is powered off again, if the charger charges the battery, the charger changes the charging state of the battery to the charged state again, and if the battery is not charged and the duration of the uncharged state reaches the first preset duration, the charger changes the charging state of the battery to the second uncharged state again. In this way, the charger can update the charging state of the battery in a timely manner.

[0134] The embodiment of the application also provides a vehicle, Figure 6 is a circuit structure schematic diagram of a vehicle provided by the embodiment of the application, referring to Figure 6 The vehicle comprises a battery 110, a controller 120 and a charger 130.

[0135] The controller 120 is connected with the charger 130, and the controller 120 is used for sending first communication information to the charger 130 of the vehicle when the controller 120 is powered on and self-checked, so as to obtain second communication information from the charger 130; if it is determined from the second communication information that the battery 110 is in a charged state, and the first residual capacity at the completion of the battery charging is contained in the second communication information, the first residual capacity in the second communication information is taken as the starting capacity of the battery 110; if it is determined from the second communication information that the battery 110 is in an uncharged state, the starting capacity of the battery is determined according to the historical residual capacity or the second residual capacity stored in the memory of the vehicle; wherein the second communication information at least comprises the charging state of the battery of the vehicle before the controller is powered on and self-checked; wherein the second residual capacity is the capacity determined by the controller according to the actual voltage of the battery.

[0136] The charger 130 is connected with the battery 110, and the charger 130 is configured to charge the battery 110 according to power of an external power source; and the charger 130 is further configured to send second communication information to the controller 120 when receiving first communication information of a controller of the vehicle.

[0137] The vehicle provided in the embodiment is used to implement the method for determining the remaining battery capacity of the vehicle provided in any of the embodiments of the application, and therefore has the same beneficial effects as the method for determining the remaining battery capacity of the vehicle provided in any of the embodiments of the application, which will not be repeated here.

[0138] It should be understood that the steps can be reordered, added, or deleted using the various forms of flow shown above. For example, each step described in the present application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0139] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall fall within the protection scope of the present application.

Claims

1. A method of determining a remaining battery level of a vehicle, characterized by, A controller applied to a vehicle, the method comprising: sending first communication information to a charger of the vehicle to obtain second communication information from the charger when the controller is powered on and self-checked, wherein the second communication information comprises at least a state of charge of a battery of the vehicle before the controller is powered on and self-checked; if it is determined from the second communication information that the battery is in a charged state and the second communication information contains a first remaining capacity of the battery when the charging of the battery is completed, taking the first remaining capacity as a starting capacity of the battery; if it is determined from the second communication information that the battery is in an uncharged state, determining the starting capacity of the battery according to a historical remaining capacity stored in a memory of the vehicle or a second remaining capacity determined by the controller according to an actual voltage of the battery; the uncharged state comprises a first uncharged state and a second uncharged state; the if it is determined from the second communication information that the battery is in an uncharged state, determining the starting capacity of the battery according to a historical remaining capacity stored in a memory of the vehicle or a second remaining capacity determined by the controller according to an actual voltage of the battery, comprises: if it is determined from the second communication information that the battery is in the first uncharged state, taking the historical remaining capacity stored in the memory of the vehicle as the starting capacity; wherein the first uncharged state is that a duration of the battery being uncharged is less than a first preset duration; if it is determined from the second communication information that the battery is in the second uncharged state, taking a minimum value between the second remaining capacity and the historical remaining capacity as the starting capacity; wherein the second uncharged state is that the duration of the battery being uncharged is greater than or equal to the first preset duration.

2. The method of claim 1, wherein, after taking the first remaining capacity as the starting capacity, the method further comprises: sending state change information to the charger to make the charger update the state of charge of the battery to the first uncharged state in response to the state change information.

3. The method according to claim 1 or 2, characterized in that, after sending the first communication information to the charger of the vehicle when the controller is powered on and self-checked, the method further comprises: if it is determined from the second communication information that the battery is in a charged state and the second communication information does not contain the first remaining capacity, continuing to send the first communication information to the charger until the second communication information received contains the first remaining capacity of the battery and the state of charge of the battery is in a charged state, and taking the first remaining capacity as the starting capacity of the battery.

4. The method according to claim 1 or 2, characterized in that, after taking the first remaining capacity as the starting capacity of the battery or determining the starting capacity of the battery according to the historical remaining capacity stored in the memory of the vehicle or the second remaining capacity, the method further comprises: periodically determining an actual remaining capacity of the battery after the controller is powered on and self-checked is completed; periodically sending third communication information to the charger; wherein the third communication information comprises the actual remaining capacity of the battery.

5. The method according to claim 1 or 2, characterized in that, after sending the first communication information to the charger of the vehicle, the method further comprises: If the second communication information is not received after a second preset time period from the time when the first communication information is sent, a fault prompt information is sent, and a second remaining power of the battery is determined according to an actual voltage of the battery, and the second remaining power is taken as the starting power.

6. A method of determining a remaining battery level of a vehicle, characterized by, The application relates to a charger applied to a vehicle, and a method. When the first communication information of the controller of the vehicle is received, the second communication information is sent to the controller, so that the controller takes the first remaining power in the second communication information as the starting power of the battery if the battery is determined to be in a charged state from the second communication information and the first remaining power in the second communication information is included; if the battery is determined to be in an uncharged state from the second communication information, the starting power of the battery is determined according to the historical remaining power or the second remaining power stored in the memory of the vehicle; the uncharged state includes a first uncharged state and a second uncharged state; if the battery is determined to be in the first uncharged state from the second communication information, the historical remaining power stored in the memory of the vehicle is taken as the starting power; if the battery is determined to be in the second uncharged state from the second communication information, the minimum value of the second remaining power and the historical remaining power is taken as the starting power; wherein the first uncharged state is that the time period when the battery is not charged is less than a first preset time period; wherein the second uncharged state is that the time period when the battery is not charged is greater than or equal to the first preset time period. The second remaining power is the power determined by the controller according to the actual voltage of the battery; and the second communication information at least includes the charging state of the battery of the vehicle before the power-on self-test of the controller.

7. The method of claim 6, wherein, When the first communication information of the controller of the vehicle is received, the method further comprises the following steps. If the battery is being charged, the second communication information including that the charging state of the battery is in the charged state is sent to the controller until the charging is completed, the first remaining power of the battery is determined, and the second communication information including that the charging state of the battery is in the charged state and including the first remaining power is sent to the controller, so that the controller takes the first remaining power as the starting power of the battery.

8. The method of claim 6, wherein, After the second communication information is sent to the controller, the method further comprises the following steps. After the third communication information sent by the controller is received, the actual remaining power of the battery is determined according to the third communication information; wherein the third communication information includes the actual remaining power of the battery.

9. The method of claim 8, wherein, After the second communication information is sent to the controller, the method further comprises the following steps. If the time period when the third communication information sent by the controller is not received reaches a third preset time period, the controller is determined to be in an offline state; After the controller is determined to be in the offline state, if the battery is charged, the charging state of the battery is determined to be in the charged state and the first remaining power is determined after the charging is completed; After determining that the controller is in an offline state, when the first communication information is received, if the duration that the battery is not charged is less than a first preset duration, it is determined that the charging state of the battery is a first uncharged state; After determining that the controller is in an offline state, when the first communication information is received, if the duration that the battery is not charged is greater than or equal to the first preset duration, it is determined that the charging state of the battery is a second uncharged state.

10. The method of claim 6, wherein, After sending the second communication information to the controller, the method further comprises: After receiving the state change information sent by the controller, the charging state of the battery is updated to the first uncharged state.

11. A vehicle characterized by comprising: Comprise: a battery, a controller and a charger; The controller is connected with the charger, and the controller is configured to, when the controller is powered on and self-checked, send first communication information to the charger of the vehicle to obtain second communication information from the charger; if it is determined from the second communication information that the battery is in a charged state, and the first remaining power at the completion of charging of the battery is included in the second communication information, the first remaining power in the second communication information is taken as the starting power of the battery; If it is determined from the second communication information that the battery is in an uncharged state, the starting power of the battery is determined according to the historical remaining power or the second remaining power stored in the memory of the vehicle; wherein the second communication information at least includes the charging state of the battery of the vehicle before the controller is powered on and self-checked; wherein the second remaining power is the power determined by the controller according to the actual voltage of the battery; the uncharged state includes the first uncharged state and the second uncharged state; the controller is configured to, if it is determined from the second communication information that the battery is in the first uncharged state, take the historical remaining power stored in the memory of the vehicle as the starting power; if it is determined from the second communication information that the battery is in the second uncharged state, take the minimum value between the second remaining power and the historical remaining power as the starting power; wherein the first uncharged state is that the duration that the battery is not charged is less than a first preset duration; wherein the second uncharged state is that the duration that the battery is not charged is greater than or equal to the first preset duration; The charger is connected with the battery, and the charger is configured to charge the battery according to the power of an external power source; the charger is further configured to, when receiving the first communication information of the controller of the vehicle, send second communication information to the controller.

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