Vehicle and charging method and charging device thereof

Abstract

The invention discloses a vehicle and a charging method and device thereof, and the method comprises the steps: obtaining the maximum output current of a charging pile, the maximum bearing current of a power grid, and the allowed maximum charging current of a vehicle power battery during charging under the condition that the communication between the charging pile and the vehicle is successful; determining a target safe charging current based on the maximum output current, the maximum bearing current of the power grid and the maximum charging current; determining a current gradient sequence based on the target safe charging current; in response to the charging request, the vehicle is charged based on the sequence of current gradients. According to the method, normal charging of the vehicle can be ensured, and the safety during charging is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a charging method of a vehicle, a vehicle and a charging device of a vehicle. BACKGROUND

[0002] Currently, the request current of the vehicle when charging is generally sent as the maximum battery demand current. For the charging pile with insufficient output capacity, the request may fail, and even the pile may be tripped due to overload protection, resulting in charging failure and inconvenience to the user. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the first object of the present application is to provide a charging method of a vehicle. In the case that a charging pile and a vehicle successfully communicate, the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the power battery of the vehicle when charging are obtained. The target safety charging current is determined based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current. The current gradient sequence is determined based on the target safety charging current. The vehicle is charged based on the current gradient sequence in response to the charging request. Thus, the normal charging of the vehicle can be ensured, and the safety during charging is guaranteed.

[0004] The second object of the present application is to provide a vehicle.

[0005] The third object of the present application is to provide a charging device of a vehicle.

[0006] To achieve the above objects, the first aspect of the present application provides a charging method of a vehicle, comprising: in the case that a charging pile and a vehicle successfully communicate, obtaining the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the power battery of the vehicle when charging; determining a target safety charging current based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current; determining a current gradient sequence based on the target safety charging current; and charging the vehicle based on the current gradient sequence in response to a charging request.

[0007] The charging method of the vehicle according to the present application embodiment, in the case that a charging pile and a vehicle successfully communicate, obtains the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the power battery of the vehicle when charging. The target safety charging current is determined based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current. The current gradient sequence is determined based on the target safety charging current. The vehicle is charged based on the current gradient sequence in response to the charging request. Thus, the method can ensure the normal charging of the vehicle, and guarantee the safety during charging.

[0008] In addition, the charging method of the vehicle according to the above-mentioned embodiments of the present application can further have the following additional technical features:

[0009] According to an embodiment of the present application, the determining the target safety current based on the maximum output current, the maximum grid carrying current and the maximum charging current comprises: determining the minimum value among the maximum output current, the maximum grid carrying current and the maximum charging current; and determining the target safety current based on the current corresponding to the minimum value.

[0010] According to an embodiment of the present application, the charging the vehicle based on the current gradient sequence comprises: charging the vehicle based on the current values in the current gradient sequence from the minimum value to the maximum value in turn.

[0011] According to an embodiment of the present application, the charging the vehicle based on the current values in the current gradient sequence from the minimum value to the maximum value in turn comprises: determining a plurality of intermediate current values among the minimum value and the maximum value; charging the vehicle based on a preset time in a case where the current value is the minimum value or the intermediate current value; and charging the vehicle based on the maximum value in a case where the charging based on the current value being the minimum value or the intermediate current value is successful.

[0012] According to an embodiment of the present application, the determining the current gradient sequence based on the target safety current further comprises: determining the number of current values in the current gradient sequence as a first preset number in a case where the target safety current is less than a preset current threshold; and determining the number of current values in the current gradient sequence as a second preset number in a case where the target safety current is greater than the preset current threshold, wherein the second preset number is greater than the first preset number.

[0013] According to an embodiment of the present application, the method further comprises: obtaining a reference timeout threshold when the charging pile and the vehicle communicate; and increasing the reference timeout threshold until the charging pile and the vehicle successfully communicate in a case where the communication duration between the charging pile and the vehicle is greater than the reference timeout threshold.

[0014] According to an embodiment of the present application, the increasing the reference timeout threshold comprises: obtaining a preset time increment threshold when the charging pile and the vehicle re-communicate for a single time; and increasing the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold and the number of communications when the charging pile and the vehicle re-communicate currently.

[0015] According to one embodiment of the present application, the increasing the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold and the number of communications when the charging pile and the vehicle re-communicate comprises: determining a target time increment value based on a product of the preset time increment threshold and the number of communications; and increasing the reference timeout threshold based on a sum of the reference timeout threshold and the target time increment value.

[0016] To achieve the above object, the second aspect of the present application proposes a vehicle, comprising a memory, a processor and a program stored in the memory and executable on the processor, wherein the processor executes the program to implement the charging method of the vehicle.

[0017] According to the vehicle of the present application, by executing the charging method of the vehicle, the normal charging of the vehicle can be ensured, and the safety during charging can be ensured.

[0018] To achieve the above object, the third aspect of the present application proposes a charging device of a vehicle, comprising: an acquisition module, configured to acquire a maximum output current of a charging pile, a maximum carrying current of a power grid and a maximum charging current allowed for a power battery of the vehicle when the charging pile and the vehicle successfully communicate; a first determination module, configured to determine a target safe charging current based on the maximum output current, the maximum carrying current and the maximum charging current; a second determination module, configured to determine a current gradient sequence based on the target safe charging current; and a charging module, configured to charge the vehicle based on the current gradient sequence in response to a charging request.

[0019] According to the charging device of the vehicle of the present application, the acquisition module is configured to acquire the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the power battery of the vehicle when the charging pile and the vehicle successfully communicate, the first determination module is configured to determine the target safe charging current based on the maximum output current, the maximum carrying current and the maximum charging current, the second determination module is configured to determine the current gradient sequence based on the target safe charging current, and the charging module is configured to charge the vehicle based on the current gradient sequence in response to the charging request. Thus, the device can ensure the normal charging of the vehicle, and ensure the safety during charging.

[0020] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Flow chart of the charging method of the vehicle according to the present application;

[0022] Figure 2A flowchart of a charging method of a vehicle according to an embodiment of the present application;

[0023] Figure 3 A block diagram of a vehicle according to an embodiment of the present application;

[0024] Figure 4 A block diagram of a charging device of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments of the present application described below are examples and are intended to explain the present application, and should not be understood as limiting the present application.

[0026] A charging method of a vehicle, a vehicle, and a charging device of a vehicle according to embodiments of the present application are described below with reference to the accompanying drawings.

[0027] Figure 1 A flowchart of a charging method of a vehicle according to an embodiment of the present application.

[0028] As shown in Figure 1 the charging method of the vehicle according to an embodiment of the present application can include the following steps:

[0029] S1, in the case that the charging pile and the vehicle successfully communicate, obtaining the maximum output current of the charging pile, the maximum carrying current of the power grid, and the maximum charging current allowed for the vehicle power battery when charging.

[0030] S2, determining a target safe charging current based on the maximum output current, the maximum carrying current of the power grid, and the maximum charging current.

[0031] S3, determining a current gradient sequence based on the target safe charging current.

[0032] S4, in response to a charging request, charging the vehicle based on the current gradient sequence.

[0033] Specifically, before the charging starts, the current limit conditions during the charging process need to be fully understood to ensure the safety and efficiency of the charging process. The successful communication between the charging pile and the vehicle indicates that the communication link between the charging pile and the vehicle has been established, and both parties can normally exchange data and instructions, which is a prerequisite for the smooth progress of the charging process. The successful communication means that the charging pile and the vehicle can complete data exchange within the preset timeout time. If the timeout is not completed, the communication will be considered a failure. For example, after the vehicle is plugged into the charging gun, the physical connection between the charging pile and the vehicle has been completed, and the electrical connection between the charging gun and the vehicle charging interface ensures that the communication signal can be transmitted. The charging pile and the vehicle start the initialization communication process through a predefined communication protocol, which specifies the format of data, transmission rate, handshake process, and other details. After the communication is successful, the charging pile and the vehicle will perform a handshake process to confirm the identity and communication capabilities of both parties. The handshake process can include: the charging pile sends its model, maximum output current, supported communication protocol version, and other information to the vehicle. The vehicle sends the battery management system related information such as the current battery capacity, maximum allowed charging current, battery temperature, etc. to the charging pile.

[0034] Thus, in the case of successful communication between the charging pile and the vehicle, the maximum output current of the charging pile, the maximum carrying current of the power grid, and the maximum charging current allowed for the vehicle power battery during charging can be obtained. That is, through the communication protocol between the charging pile and the vehicle, the charging pile will send its maximum output current information to the vehicle, and the vehicle's battery management system will receive and record this information. The maximum carrying current of the power grid can be specified by the power grid operator, and the charging pile will dynamically adjust its maximum output current according to the real-time state of the power grid (such as voltage, frequency, etc.), and the vehicle's battery management system can obtain the maximum carrying current of the power grid through the charging pile's communication interface. The maximum charging current of the vehicle power battery is determined by the battery's specifications and can be stored in the battery management system's parameter settings. The battery management system will dynamically adjust its maximum charging current according to the current state of the battery (such as remaining charge, temperature, etc.). Thus, by obtaining the maximum current limits of the charging pile, the power grid, and the vehicle power battery, the restriction conditions during the charging process can be fully understood, and these information will serve as the basis for subsequent determination of the target safe charging current and current gradient sequence, ensuring the safety and efficiency of the charging process.

[0035] After determining the maximum output current, the maximum grid carrying current and the maximum charging current, the target safe charging current can be determined based on the maximum output current, the maximum grid carrying current and the maximum charging current. For example, the target safe charging current can be determined by a pre-set corresponding relationship, for example, a pre-determined relationship between the maximum output current, the maximum grid carrying current, the maximum charging current and the target safe charging current, after determining the maximum output current, the maximum grid carrying current and the maximum charging current, the target safe charging current can be obtained by directly calling the corresponding relationship. For example, the target safe charging current can be the minimum value of the maximum output current, the maximum grid carrying current and the maximum charging current, or a safe charging current calculated according to the maximum output current, the maximum grid carrying current and the maximum charging current by a certain calculation rule, aiming to ensure safety, the maximum output capacity of the charging pile and the grid is as close as possible, thereby improving the charging efficiency.

[0036] After determining the target safe charging current, the current gradient sequence can be determined based on the target safe charging current. That is, according to the target safe charging current, a current gradient sequence that gradually increases is designed to ensure the stability and safety of the charging process. For example, the target safe charging current can be evenly distributed to each gradient step to calculate the current value of each gradient step. For example, for a three-step gradient, the target safe charging current can be divided into three equal parts, for a four-step gradient, it can be divided into four equal parts, etc. Thus, the calculated gradient current values are arranged in order to form a current gradient sequence. In this way, by gradually increasing the charging current, the impact on the charging pile, the grid and the battery caused by sudden changes in current can be avoided, thereby ensuring the stability of the charging process. The gradient charging strategy can effectively prevent the charging pile from overloading and tripping and the battery from being damaged, thereby improving the safety of the charging process.

[0037] Finally, the vehicle can be charged in response to the charging request and based on the current gradient sequence. That is, the vehicle battery management system can send a charging request to the charging pile according to the first current value of the current gradient sequence. The charging pile starts charging according to the received charging request and gradually increases the charging current until it reaches the next current value of the current gradient sequence. The battery management system continuously monitors the charging state at each gradient step to ensure that the charging current does not exceed the target safe charging current.

[0038] In this way, by using the gradient charging strategy, the charging pile can be effectively prevented from overloading and tripping and the battery can be effectively prevented from being damaged, thereby ensuring the safety of the charging process. Under the premise of safety, gradually increasing the charging current can fully utilize the output capacity of the charging pile and the grid, thereby improving the charging efficiency and reducing the possibility of charging failure, thereby improving the user's satisfaction with the charging process.

[0039] According to one embodiment of the present application, determining the target safety current based on the maximum output current, the maximum grid carrying current and the maximum charging current includes: determining the minimum value of the maximum output current, the maximum grid carrying current and the maximum charging current; determining the target safety current based on the current corresponding to the minimum value.

[0040] Specifically, when determining the target safety current based on the maximum output current, the maximum grid carrying current and the maximum charging current, the minimum value of the maximum output current, the maximum grid carrying current and the maximum charging current can be determined first. After determining the minimum value, the target safety current can be determined according to the current corresponding to the minimum value.

[0041] That is, the maximum output current of the charging pile refers to the maximum current that the charging pile can provide under normal working conditions. This value can be provided by the manufacturer of the charging pile and will be different according to the power level of the charging pile, for example, the maximum output current of a 7kW alternating current charging pile is 32A, the maximum output current of a 120kW direct current charging pile is 300A, the maximum output current of a 320kW direct current charging pile is 500A, etc. The maximum grid carrying current refers to the maximum current that the grid can safely provide under the current state. This value is usually specified by the grid operator, and the specific value depends on the capacity of the grid and the current load condition. For example, for a 7.2kW charging pile installed at home, the grid needs to provide a power supply capacity of 30A, and for a 19.2kW charging pile, the grid needs to provide a power supply capacity of 100A. The maximum charging current refers to the maximum current allowed for the vehicle power battery during charging. This value is usually dynamically adjusted by the battery management system of the vehicle according to the specifications and current state of the battery. For example, the maximum charging current of some electric vehicles may be 250A, and for some vehicle models, the maximum charging current may reach 229A, etc.

[0042] The target safety current refers to the maximum current that can ensure the safety of the charging process among the three limiting conditions of the maximum output current of the charging pile, the maximum carrying current of the grid and the maximum charging current of the vehicle power battery. That is, the maximum output current of the charging pile, the maximum carrying current of the grid and the maximum charging current of the vehicle power battery are compared. The target safety current is the minimum value of the above three current values, because the charging current cannot exceed any one of the limiting conditions, otherwise it may cause the charging pile to overload, the grid to be unstable or the battery to be damaged. For example, if the maximum output current of the charging pile is 300A, the maximum carrying current of the grid is 250A, and the maximum charging current of the vehicle power battery is 229A, then the target safety current should be 229A. In this way, it can be ensured that the charging process is carried out within a safe current range, while maximizing the output capacity of the charging pile and the grid, and improving the charging efficiency.

[0043] According to one embodiment of the present application, charging the vehicle based on the current gradient sequence includes: sequentially charging the vehicle based on the current values in the current gradient sequence from the minimum value to the maximum value.

[0044] Specifically, when charging the vehicle according to the current gradient sequence, the vehicle can be sequentially charged according to the current values in the current gradient sequence from the minimum value to the maximum value. That is, the current gradient sequence refers to dividing the target safe charging current into several gradually increasing current values to form an ordered current sequence. Each current value is called a gradient step. For example, if the target safe charging current is 200A, the charging process can be divided into several gradient steps, such as 50A, 100A, 150A, and 200A. During the charging process, the charging current is gradually increased according to the current gradient sequence. That is, the battery management system of the vehicle sends a charging request to the charging pile according to the first current value (minimum value) of the current gradient sequence. For example, if the first current value of the current gradient sequence is 50A, the battery management system sends a charging instruction of 50A to the charging pile. The charging pile starts charging according to the received charging request and sets the charging current to 50A. During the charging process, the battery management system continuously monitors the state of the battery (such as voltage, temperature, etc.) to ensure the safety of the charging process.

[0045] When the charging process of the first gradient step is stable, the battery management system sends a charging request of the next gradient step to the charging pile. For example, from 50A to 100A, the charging pile adjusts the charging current to 100A. Repeat the above process to gradually increase the charging current until the target safe charging current (maximum value) is reached. When the charging current reaches the target safe charging current (maximum value), continue charging until the battery is fully charged. During the entire charging process, the battery management system continuously monitors the state of the battery to ensure that the charging current does not exceed the target safe charging current.

[0046] For example, assume that the target safe charging current is 200A and the current gradient sequence is 50A, 100A, 150A, and 200A. The battery management system sends a charging instruction of 50A to the charging pile, and the charging pile starts charging at a current of 50A. When the 50A charging is stable, the battery management system sends a charging instruction of 100A to the charging pile, and the charging pile adjusts the charging current to 100A. When the 100A charging is stable, the battery management system sends a charging instruction of 150A to the charging pile, and the charging pile adjusts the charging current to 150A. When the 150A charging is stable, the battery management system sends a charging instruction of 200A to the charging pile, and the charging pile adjusts the charging current to 200A. When the charging current reaches 200A, continue charging until the battery is fully charged. In this way, the vehicle charging process is more stable, safe and efficient.

[0047] According to one embodiment of the present application, the vehicle is sequentially charged based on the current values in the current gradient sequence from the minimum value to the maximum value, comprising: determining a plurality of intermediate current values between the minimum value and the maximum value; in the case that the current value is the minimum value or the intermediate current value, charging the vehicle based on a preset time; in the case that the charging with the current value being the minimum value or the intermediate current value is successful, charging the vehicle based on the maximum value. Wherein, the preset time can be determined according to the actual situation.

[0048] Specifically, when the vehicle is sequentially charged according to the current values in the current gradient sequence from the minimum value to the maximum value, a plurality of intermediate current values between the minimum value and the maximum value can be determined. For example, a plurality of intermediate current values can be determined according to a certain proportion of the target target safety current between the minimum value and the maximum value. For example, the target safety charging current is 200A, the minimum value in the current gradient sequence is 50A, and the maximum value is 200A. The plurality of intermediate current values can be one-half of the target safety charging current 200A, can be four-fifths of the target safety charging current 200A, etc.

[0049] In the case that the current value is the minimum value or the intermediate current value, the vehicle is charged according to the preset time. For example, each gradient step is charged for 5 minutes. During the charging process of the current gradient step, if the battery state is normal (such as no overvoltage, overcurrent, overheating, etc. Abnormal situation), it is considered that the current gradient step charging is successful. In the case that the charging with the current value being the minimum value or the intermediate current value is successful, the vehicle can be charged based on the maximum value. That is, after the charging current reaches the maximum value, the charging continues until the battery is fully charged. During the entire charging process, the battery management system continuously monitors the state of the battery to ensure that the charging current does not exceed the target safety charging current.

[0050] Therefore, by gradually increasing the charging current, the impact on the charging pile, the power grid and the battery caused by the sudden change of the current is avoided, thereby ensuring the safety of the charging process. This method can adapt to charging piles of different power and batteries of different states, and improves the compatibility of the charging system.

[0051] According to one embodiment of the present application, the current gradient sequence is determined based on the target safety current, further comprising: in the case that the target safety current is less than a preset current threshold, determining the number of current values in the current gradient sequence to be a first preset number; in the case that the target safety current is greater than the preset current threshold, determining the number of current values in the current gradient sequence to be a second preset number, wherein the second preset number is greater than the first preset number. Wherein, the preset current threshold can be determined according to the actual situation, and the first preset number and the second preset number can be determined according to the actual situation.

[0052] Specifically, when the current gradient sequence is determined according to the target safety current, the size relationship between the target safety current and the preset current threshold can also be judged. In the case where the target safety current is less than the preset current threshold, the number of current values in the current gradient sequence is determined as the first preset number. In the case where the target safety current is greater than the preset current threshold, the number of current values in the current gradient sequence is determined as the second preset number. That is, the preset current threshold is a reference value for distinguishing between low-power charging and high-power charging. For example, 100A can be taken as the preset current threshold. If the target safety current is less than 100A, it is considered to be low-power charging, and if the target safety current is greater than 100A, it is considered to be high-power charging.

[0053] According to the comparison result of the target safety current and the preset current threshold, the number of current values in the current gradient sequence is dynamically determined. In the case of low-power charging, the number of current values in the current gradient sequence is small. For example, it can be set to 3 gradient steps. Assuming that the target safety current is 80A, the preset current threshold is 100A, and the first preset number is 3, the current gradient sequence is: 20A, 50A, 80A. In the case of high-power charging, the number of current values in the current gradient sequence is large. For example, the second preset number can be 4 or more gradient steps. Assuming that the target safety current is 200A, the preset current threshold is 100A, and the second preset number is 4, the current gradient sequence is 50A, 100A, 150A, 200A.

[0054] Thus, in the case of high-power charging, the range of current change is large, and by increasing the number of gradient steps, the current change can be divided into a plurality of smaller increments, thereby avoiding the impact on the charging pile, the power grid and the battery caused by sudden change of current. In the case of low-power charging, the range of current change is small, and by setting a small number of gradient steps, the charging request can be responded to faster, ensuring that the vehicle can quickly obtain the required power, reducing the transition time and improving the overall charging efficiency.

[0055] According to an embodiment of the present application, the charging method of the vehicle further comprises: obtaining a reference timeout threshold when the charging pile and the vehicle communicate; in the case where the communication time between the charging pile and the vehicle is greater than the reference timeout threshold, increasing the reference timeout threshold until the charging pile and the vehicle successfully communicate.

[0056] Specifically, at present, the battery management system manufacturers can successfully communicate with the charging piles meeting the national standard according to the reference timeout threshold (such as 200 ms). However, for the old charging piles with response delay (measured up to 500 ms or more) or originally long specified time, the communication cannot be adapted and charging cannot be performed. In order to solve this problem, the reference timeout threshold during communication between the charging pile and the vehicle can be obtained, and the reference timeout threshold is increased until the communication between the charging pile and the vehicle is successful, in the case that the communication time between the charging pile and the vehicle is greater than the reference timeout threshold.

[0057] That is, when the communication time between the charging pile and the vehicle is greater than the reference timeout threshold, the communication system detects the timeout event, thereby automatically increasing the timeout threshold. The increased timeout threshold should ensure that the communication can be completed within the new time limit, avoiding frequent timeouts. If the communication still times out, the timeout threshold can be continuously increased until the communication between the charging pile and the vehicle is successful.

[0058] For example, assuming that the reference timeout threshold is 200 ms, and the communication time exceeds 200 ms, resulting in timeout. In the case of the first timeout, the system detects the timeout and increases the timeout threshold by 50 ms, adjusting it to 150 ms. If the communication between the vehicle and the charging pile still times out within 150 ms, the timeout threshold can be increased again, adjusting it to 200 ms. The above process is repeated until the communication time is less than the current timeout threshold, and it is determined that the communication is successful.

[0059] Therefore, dynamically adjusting the timeout threshold can adapt to the delay changes in different communication environments, improve the reliability of communication, and reduce frequent communication failures caused by communication timeout by gradually increasing the timeout threshold, thereby improving the charging efficiency and effectively solving the problem of unstable communication between the charging pile and the vehicle, and ensuring the smooth progress of the charging process.

[0060] According to an embodiment of the present application, increasing the reference timeout threshold comprises: obtaining a preset time increment threshold during single communication between the charging pile and the vehicle; and increasing the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold, and the number of communications during the current communication between the charging pile and the vehicle. The preset time increment threshold can be determined according to actual conditions.

[0061] Specifically, when increasing the reference timeout threshold, the preset time increment threshold during single communication between the charging pile and the vehicle can be obtained. The preset time increment threshold refers to the timeout threshold that is increased each time when the communication times out. This value can be set according to actual conditions, for example: the increment threshold is 50 ms or 100 ms each time. After obtaining the preset time increment threshold, the reference timeout threshold is increased based on the reference timeout threshold, the preset time increment threshold, and the number of communications during the current communication between the charging pile and the vehicle.

[0062] That is, when the communication duration between the charging pile and the vehicle is greater than the reference timeout threshold, the timeout threshold needs to be dynamically adjusted. According to the preset time increment threshold, the timeout threshold is increased. For example, if the reference timeout threshold is 100 milliseconds and the preset time increment threshold is 50 milliseconds, after the first timeout, the timeout threshold is adjusted to 150 milliseconds. If the communication still times out, the timeout threshold continues to be increased until the communication is successful. For example, the value of increasing the reference timeout threshold can be determined by a predetermined correspondence relationship, for example, a predetermined relationship between the reference timeout threshold, the preset time increment threshold, the number of communications when the current charging pile and the vehicle re-communicate, and the value of increasing the reference timeout threshold. After the reference timeout threshold, the preset time increment threshold, and the number of communications are determined, the value of increasing the reference timeout threshold can be obtained by directly calling the corresponding relationship.

[0063] Thus, by dynamically adjusting the reference timeout threshold, the problem of unstable communication between the charging pile and the vehicle can be effectively solved, and the smooth progress of the charging process is ensured.

[0064] According to an embodiment of the present application, the reference timeout threshold is increased based on the reference timeout threshold, the preset time increment threshold, and the number of communications when the current charging pile and the vehicle re-communicate, comprising: determining a target time increment value based on the product of the preset time increment threshold and the number of communications; increasing the reference timeout threshold based on the sum of the reference timeout threshold and the target time increment value.

[0065] Specifically, when the reference timeout threshold is increased based on the reference timeout threshold, the preset time increment threshold, and the number of communications when the current charging pile and the vehicle re-communicate, the target time increment value can be determined based on the product of the preset time increment threshold and the number of communications, that is, the target time increment value is equal to the preset time increment threshold multiplied by the current number of communications. After the target time increment value is determined, the reference timeout threshold can be increased based on the sum of the reference timeout threshold and the target time increment value. That is, the new timeout threshold is equal to the reference timeout threshold plus the target time increment value, and the new timeout threshold is applied to the current communication process.

[0066] Suppose the reference timeout threshold is 200 ms, the preset time increment threshold is 50 ms, and the current number of communications is 3 times. The specific calculation process is as follows: calculate the target time increment value: target time increment value = preset time increment threshold x number of communications = 50 ms x 3 = 150 ms, new timeout threshold = reference timeout threshold + target time increment value = 200 ms + 150 ms = 350 ms. The new timeout threshold 350 ms is applied to the current communication process.

[0067] Therefore, by dynamically adjusting the reference timeout threshold, the problem of unstable communication between the charging pile and the vehicle can be effectively solved, and the smooth progress of the charging process is ensured.

[0068] The method of the present application will be described below in conjunction with Figure 2 The method of the present application will be described below in conjunction with

[0069] As a specific example, the charging method of the vehicle of the present application can include the following steps:

[0070] S101, obtaining a reference timeout threshold when the charging pile and the vehicle communicate.

[0071] S102, determining whether the communication duration of the charging pile and the vehicle is greater than the reference timeout threshold. If yes, step S103 is executed; if no, step S105 is executed.

[0072] S103, obtaining a preset time increment threshold when the charging pile and the vehicle re-communicate.

[0073] S104, increasing the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold, and the number of times of communication when the charging pile and the vehicle re-communicate.

[0074] S105, in the case of successful communication between the charging pile and the vehicle, obtaining the maximum output current of the charging pile, the maximum carrying current of the power grid, and the maximum charging current allowed for the vehicle power battery during charging.

[0075] S106, determining the minimum value of the maximum output current, the maximum carrying current of the power grid, and the maximum charging current, and determining the target safety current based on the current corresponding to the minimum value.

[0076] S107, determining the current gradient sequence based on the target safety charging current.

[0077] S108, in response to a charging request, determining a plurality of intermediate current values between the minimum value and the maximum value.

[0078] S109, in the case that the current value is the minimum value or the intermediate current value, charging the vehicle based on a preset time.

[0079] S110, in the case of successful charging with the current value being the minimum value or the intermediate current value, charging the vehicle based on the maximum value.

[0080] In summary, according to the charging method of the vehicle, in the case that the charging pile and the vehicle successfully communicate, the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the power battery of the vehicle during charging are obtained, the target safe charging current is determined based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current, the current gradient sequence is determined based on the target safe charging current, and the vehicle is charged based on the current gradient sequence in response to the charging request. Therefore, the method can ensure normal charging of the vehicle and safety during charging.

[0081] Corresponding to the above embodiment, the application further provides a vehicle.

[0082] As shown in Figure 3 the vehicle 200 of the embodiment of the application can include a memory 210, a processor 220 and a program stored on the memory 210 and executable on the processor 220, and when the processor 220 executes the program, the charging method of the vehicle described above is implemented.

[0083] According to the vehicle of the embodiment of the application, by executing the charging method of the vehicle described above, normal charging of the vehicle can be ensured, and safety during charging can be ensured.

[0084] Corresponding to the above embodiment, the application further provides a charging device of a vehicle.

[0085] As shown in Figure 4 the charging device 100 of the vehicle of the embodiment of the application includes an acquisition module 110, a first determination module 120, a second determination module 130 and a charging module 140.

[0086] The acquisition module 110 is configured to, in the case that the charging pile and the vehicle successfully communicate, acquire the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the power battery of the vehicle during charging. The first determination module 120 is configured to determine the target safe charging current based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current. The second determination module 130 is configured to determine the current gradient sequence based on the target safe charging current. The charging module 140 is configured to charge the vehicle based on the current gradient sequence in response to the charging request.

[0087] According to one embodiment of the application, the first determination module 120 determines the target safe current based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current, specifically configured to: determine the minimum value among the maximum output current, the maximum carrying current of the power grid and the maximum charging current; and determine the target safe current based on the current corresponding to the minimum value.

[0088] According to an embodiment of the present application, the charging module 140 charges the vehicle based on the current gradient sequence, specifically for: charging the vehicle in turn based on the current values in the current gradient sequence from the minimum value to the maximum value.

[0089] According to an embodiment of the present application, the charging module 140 charges the vehicle based on the current values in the current gradient sequence from the minimum value to the maximum value, specifically for: determining a plurality of intermediate current values between the minimum value and the maximum value; charging the vehicle based on the preset time in the case that the current value is the minimum value or the intermediate current value; charging the vehicle based on the maximum value in the case that the charging with the current value being the minimum value or the intermediate current value is successful.

[0090] According to an embodiment of the present application, the second determining module 130 determines the current gradient sequence based on the target safety current, specifically for: determining the number of current values in the current gradient sequence as a first preset number in the case that the target safety current is less than a preset current threshold; determining the number of current values in the current gradient sequence as a second preset number in the case that the target safety current is greater than the preset current threshold, wherein the second preset number is greater than the first preset number.

[0091] According to an embodiment of the present application, the obtaining module 110 is further configured to: obtain a reference timeout threshold when the charging pile and the vehicle communicate; increase the reference timeout threshold in the case that the communication duration between the charging pile and the vehicle is greater than the reference timeout threshold, until the communication between the charging pile and the vehicle is successful.

[0092] According to an embodiment of the present application, the obtaining module 110 increases the reference timeout threshold, specifically for: obtaining a preset time increment threshold when the charging pile and the vehicle re-communicate for a single time; increasing the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold and the communication number when the charging pile and the vehicle re-communicate currently.

[0093] According to an embodiment of the present application, the obtaining module 110 increases the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold and the communication number when the charging pile and the vehicle re-communicate currently, specifically for: determining a target time increase value based on the product of the preset time increment threshold and the communication number; increasing the reference timeout threshold based on the sum of the reference timeout threshold and the target time increase value.

[0094] It should be noted that the details of the charging device of the vehicle in the embodiments of the present application are not disclosed, please refer to the details disclosed in the charging method of the vehicle in the embodiments of the present application, which will not be described here.

[0095] According to the charging device of the vehicle, the obtaining module is configured to obtain the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the vehicle power battery during charging when the charging pile and the vehicle successfully communicate, the first determining module is configured to determine the target safe charging current based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current, the second determining module is configured to determine the current gradient sequence based on the target safe charging current, and the charging module is configured to charge the vehicle based on the current gradient sequence in response to the charging request. Thus, the device can ensure normal charging of the vehicle and safety during charging.

[0096] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a list of executable instructions for implementing logic functions, which can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor- based system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions, or in conjunction with which the instructions can be executed. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection having one or more wires (electrical apparatus), a portable computer diskette (magnetic apparatus), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber (optical apparatus), and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium can even be paper or another suitable medium upon which the program is printed, because the program can be electronically captured, for example, by optically scanning the paper or other medium, then electronically converted into a form that is suitable for use by the instruction execution system, apparatus, or device, and stored in computer memory.

[0097] It should be understood that parts of the present application can be realized in hardware, software, firmware, or a combination thereof. In the above-described embodiments, a plurality of steps or methods can be realized by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized in hardware, and as in another embodiment, any one or a combination of the following technologies known in the art can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits (ASICs) having appropriate combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), and the like.

[0098] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0099] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0100] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrated; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0101] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A charging method of a vehicle, characterized by, The method comprises: In the case that the charging pile and the vehicle successfully communicate, acquiring the maximum output current of the charging pile, the maximum carrying current of the power grid and the maximum charging current allowed for the power battery of the vehicle when charging; Determining a target safe charging current based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current; Determining a current gradient sequence based on the target safe charging current; In response to a charging request, charging the vehicle based on the current gradient sequence.

2. The charging method of a vehicle according to claim 1, characterized by, The determination of the target safe current based on the maximum output current, the maximum carrying current of the power grid and the maximum charging current comprises: Determining the minimum value among the maximum output current, the maximum carrying current of the power grid and the maximum charging current; Determining the target safe current based on the current corresponding to the minimum value.

3. The charging method of a vehicle according to claim 1, characterized by, The charging of the vehicle based on the current gradient sequence comprises: Charging the vehicle based on the current values in the current gradient sequence from the minimum value to the maximum value in turn.

4. The charging method of a vehicle according to claim 3, characterized by, The charging of the vehicle based on the current values in the current gradient sequence from the minimum value to the maximum value in turn comprises: Determining a plurality of intermediate current values between the minimum value and the maximum value; In the case that the current value is the minimum value or the intermediate current value, charging the vehicle based on a preset time; In the case that the charging with the current value being the minimum value or the intermediate current value is successful, charging the vehicle based on the maximum value.

5. The charging method of a vehicle according to claim 1, characterized by, The determination of the current gradient sequence based on the target safe current further comprises: In the case that the target safe current is less than a preset current threshold, determining the number of current values in the current gradient sequence as a first preset number; In the case that the target safe current is greater than the preset current threshold, determining the number of current values in the current gradient sequence as a second preset number, wherein the second preset number is greater than the first preset number.

6. The charging method of a vehicle according to claim 1, characterized by, The method further comprises: Acquiring a reference timeout threshold when the charging pile and the vehicle communicate; In the case that the communication duration between the charging pile and the vehicle is greater than the reference timeout threshold, increasing the reference timeout threshold until the charging pile and the vehicle successfully communicate.

7. The charging method of a vehicle according to claim 6, characterized by, The increasing of the reference timeout threshold comprises: Acquiring a preset time increment threshold when the charging pile and the vehicle re-communicate for a single time; Increasing the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold and the communication number when the charging pile and the vehicle re-communicate currently.

8. The charging method of a vehicle according to claim 7, characterized by, The increasing of the reference timeout threshold based on the reference timeout threshold, the preset time increment threshold and the communication number when the charging pile and the vehicle re-communicate currently comprises: Determining a target time increment value based on the product of the preset time increment threshold and the communication number; Increasing the reference timeout threshold based on the sum of the reference timeout threshold and the target time increment value.

9. A vehicle characterized by comprising: Comprise: A memory, a processor, and a program stored on the memory and capable of running on the processor, the processor implementing the charging method of the vehicle according to any one of claims 1-8 when executing the program.

10. A charging device of a vehicle, characterized by, The device comprises: An acquisition module, configured to acquire a maximum output current of a charging pile, a maximum carrying current of a power grid, and a maximum charging current allowed for a power battery of a vehicle when the power battery is being charged, in a case where the charging pile and the vehicle successfully communicate; A first determination module, configured to determine a target safe charging current based on the maximum output current, the maximum carrying current, and the maximum charging current; A second determination module, configured to determine a current gradient sequence based on the target safe charging current; A charging module, configured to charge the vehicle based on the current gradient sequence in response to a charging request.

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