Electric vehicle safe charging method, device, electronic device and storage medium

Abstract

This application provides a safe charging method, device, electronic device, and storage medium for electric vehicles. The method includes: evaluating the charging safety level of the electric vehicle based on its historical battery charging data, determining a first evaluation level for the electric vehicle, with different first evaluation levels corresponding to different first rechargeability coefficients; evaluating the lifespan of the charging pile to determine a second evaluation level for the charging pile, with different second evaluation levels corresponding to different second rechargeability coefficients; and charging the electric vehicle based on the first and second rechargeability coefficients. This method reduces the risk of charging electric vehicles.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicle charging, and in particular to a method, device, electronic device and storage medium for safe charging of electric vehicles. Background Art

[0002] As a key new energy source, electric vehicles have gradually replaced traditional fuel vehicles as a key mode of transportation. However, electric vehicle batteries are both their power source and a major cause of fires, hindering the long-term development of the electric vehicle industry.

[0003] At present, in order to ensure the safety of electric vehicle charging, the monitoring host computer monitors the maximum voltage of the single battery, the current state of charge (SOC) of the battery, and other information during the charging process of the electric vehicle. When the information is abnormal, the battery abnormality is handled accordingly according to the pre-set processing method, thereby monitoring the charging process and preventing accidents.

[0004] However, the safety risks of using the above charging method are still high, seriously threatening people's life, health and property safety. Summary of the Invention

[0005] The present application provides a method, device, electronic device and storage medium for safely charging an electric vehicle, to address the problem of high safety risks in charging an electric vehicle.

[0006] In a first aspect, the present application provides a method for safely charging an electric vehicle, comprising:

[0007] Evaluate the charging safety level of the electric vehicle based on historical battery charging data, and determine a first evaluation level of the electric vehicle, where different first evaluation levels correspond to different first rechargeable coefficients;

[0008] Performing a life assessment on a charging pile to determine a second assessment level of the charging pile, wherein different second assessment levels correspond to different second rechargeable coefficients, and the charging pile is used to charge electric vehicles;

[0009] The electric vehicle is charged according to the first chargeable coefficient and the second chargeable coefficient.

[0010] Optionally, charging the electric vehicle according to the first chargeable coefficient and the second chargeable coefficient includes:

[0011] determining a first chargeable power according to the first chargeable coefficient;

[0012] determining a second chargeable power according to a second chargeable coefficient;

[0013] determining an upper limit of a rechargeable power for the current charge according to the smaller value of the first rechargeable power and the second rechargeable power;

[0014] Charge electric vehicles according to the upper limit of charging power.

[0015] Optionally, charging of electric vehicles, including:

[0016] After charging is started, if it is determined that the battery temperature of the electric vehicle is abnormal and / or the charging current is abnormal, charging is stopped.

[0017] Optionally, determining that the battery temperature rise of the electric vehicle is abnormal and / or the charging current is abnormal includes:

[0018] After charging is started, determining whether the battery temperature reaches a temperature protection threshold or the temperature rise rate reaches a first preset threshold within a first preset time period;

[0019] And / or, determining that within a second preset time period, the charging current of the battery remains unchanged or the charging current change rate reaches a second preset threshold.

[0020] Optionally, charging of electric vehicles, including:

[0021] When starting charging, if it is determined that the input current peak of the charging pile exceeds a preset ratio of the rated current peak, the charging is stopped.

[0022] Optionally, charging of electric vehicles, including:

[0023] After starting charging, if it is determined that the temperature of the charging gun pole of the charging pile reaches the first preset temperature threshold and the duration reaches the third preset time, or reaches the second preset temperature threshold, charging is stopped, wherein the temperature represented by the first preset temperature threshold is lower than the temperature represented by the second preset temperature threshold.

[0024] Optionally, after charging the electric vehicle, the following steps are also included:

[0025] After stopping charging and before pulling out the charging gun, if it is determined that the temperature of the charging gun pole is abnormal, at least two indication messages are sent to the charging pile, both of which are used to instruct to disconnect the electronic lock of the charging gun.

[0026] In a second aspect, the present application provides a safe charging device for an electric vehicle, comprising:

[0027] a first evaluation module, configured to evaluate the charging safety level of the electric vehicle based on historical battery charging data of the electric vehicle, and determine a first evaluation level of the electric vehicle, wherein different first evaluation levels correspond to different first rechargeable coefficients;

[0028] a second evaluation module, configured to evaluate the life of the charging pile and determine a second evaluation level of the charging pile, wherein different second evaluation levels correspond to different second rechargeable coefficients, and the charging pile is used to charge electric vehicles;

[0029] The charging module is used to charge the electric vehicle according to a first chargeable coefficient and a second chargeable coefficient.

[0030] In a third aspect, the present application provides an electronic device, comprising: a memory and a processor;

[0031] The memory is used to store computer programs; the processor is used to execute the computer programs stored in the memory to implement the electric vehicle safe charging method in the first aspect and any embodiment of the first aspect.

[0032] In a fourth aspect, the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the electric vehicle safe charging method in the first aspect and any one of the embodiments of the first aspect is implemented.

[0033] The electric vehicle safe charging method, device, electronic device and storage medium provided in the present application evaluate the charging safety level based on the historical charging data of the electric vehicle's battery to determine the first evaluation level of the electric vehicle, then evaluate the life of the charging pile to determine the second evaluation level of the charging pile, and finally charge the electric vehicle based on the first rechargeable coefficient and the second rechargeable coefficient, fully considering the safety issues of the electric vehicle's battery and charging pile, and achieving the effect of reducing the risk of electric vehicle charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A schematic diagram of an electric vehicle charging scenario provided in one embodiment of the present application;

[0036] Figure 2 A flowchart of a safe charging method for an electric vehicle provided in one embodiment of the present application;

[0037] Figure 3 A flowchart of another electric vehicle safe charging method provided in one embodiment of the present application;

[0038] Figure 4A flowchart of another method for safely charging an electric vehicle provided in one embodiment of the present application;

[0039] Figure 5 A schematic structural diagram of a safe charging device for an electric vehicle provided in one embodiment of the present application;

[0040] Figure 6 A schematic diagram of the hardware structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] In the specification and claims of this application, as well as in the accompanying drawings, the terms "first," "second," "third," and the like are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that such terms are interchangeable where appropriate. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0043] It should be further understood that the term “comprising” indicates the existence of features, steps, operations, elements, components, items, kinds, and / or groups, but does not preclude the existence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups.

[0044] The terms "or" and "and / or" as used herein are to be interpreted as inclusive, or mean any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." An exception to this definition occurs only when a combination of elements, functions, steps, or operations are inherently mutually exclusive in some manner.

[0045] Frequent electric vehicle fires not only pose a serious threat to public health and property safety, but also impact the long-term development of the electric vehicle industry. Batteries, the power source of electric vehicles, are also the primary cause of electric vehicle fires, leading to significant attention being paid to the safety of electric vehicle charging.

[0046] In the existing technology, during the charging process of electric vehicles, the monitoring host computer monitors information such as the maximum voltage of the single battery and the current SOC value of the battery. When the information is abnormal, the battery abnormality is handled accordingly according to the pre-set processing method, thereby monitoring the charging process, ensuring the safety of electric vehicle charging, and preventing fire accidents.

[0047] However, when using the above charging method, the thermal runaway factors accumulated in the battery during the charging process may be delayed until the static stage after charging, which may then trigger thermal runaway and lead to safety accidents. The safety risk is still high.

[0048] In response to the above problems, the present application proposes a safe charging method, device, electronic device and storage medium for electric vehicles. The charging safety level is evaluated based on the historical charging data of the electric vehicle's battery to determine the first evaluation level of the electric vehicle. The life of the charging pile is then evaluated to determine the second evaluation level of the charging pile. Finally, the electric vehicle is charged based on the first rechargeable coefficient and the second rechargeable coefficient. The safety issues of the electric vehicle's battery and charging pile are fully considered, thereby reducing the risk of charging electric vehicles.

[0049] Figure 1 FIG1 shows a schematic diagram of an electric vehicle charging scenario provided by an embodiment of the present application. Figure 1 As shown, the charging gun of the charging pile is connected to the electric vehicle to charge the electric vehicle. The background server can be a host computer or other electronic device that is connected to the charging pile and can execute the electric vehicle safe charging method provided in this application. The background server obtains and processes relevant data about the charging pile and the electric vehicle through the communication connection with the charging pile to ensure the charging safety of the electric vehicle.

[0050] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0051] In this application, an electronic device is used as the execution subject to execute the electric vehicle safe charging method of the following embodiments. Specifically, the execution subject can be a hardware device of the electronic device, or a software application that implements the following embodiments in the electronic device, or a computer-readable storage medium that has installed thereon the software application that implements the following embodiments, or the code that implements the software application of the following embodiments.

[0052] Figure 2 FIG1 shows a flow chart of a safe charging method for an electric vehicle provided by an embodiment of the present application. Figure 2 As shown, with the electronic device as the execution subject, the method of this embodiment may include the following steps:

[0053] S201 : Evaluate the charging safety level of the electric vehicle based on historical battery charging data of the electric vehicle, and determine a first evaluation level of the electric vehicle, where different first evaluation levels correspond to different first chargeability coefficients.

[0054] In this embodiment, after the electric vehicle is connected to the charging pile, the electronic device obtains relevant information of the electric vehicle through the charging gun of the charging pile, such as the battery type, the rated capacity and rated voltage of the battery, the vehicle identification number (VIN code) of the electric vehicle, and the battery's historical charging data, and uses this information to evaluate the charging safety level and determine the first evaluation level.

[0055] As needed, different battery and vehicle information may be pre-set to correspond to different charging safety levels, that is, different first assessment levels.

[0056] Different first assessment levels also correspond to different first rechargeable coefficients. For example, if the first assessment level is A, the first rechargeable coefficient is 100%, that is, charging at 100% of the SOC requirement; if the first assessment level is B, the first rechargeable coefficient is 95%, that is, charging at 95% of the SOC requirement; if the first assessment level is C, the first rechargeable coefficient is 90%, that is, charging at 90% of the SOC requirement, and so on.

[0057] S202: Evaluate the life of the charging pile to determine a second evaluation level of the charging pile, where different second evaluation levels correspond to different second rechargeable coefficients. The charging pile is used to charge electric vehicles.

[0058] In this embodiment, evaluating the lifespan of a charging pile refers to evaluating the lifespan of the charging pile's electrical components. The electronic device can assess the lifespan of the electrical components based on the number of times the charging gun is plugged in and out, and the number of times internal components such as circuit breakers, relays, and contactors are closed and disconnected, to determine the second evaluation level.

[0059] Likewise, different electrical component information may be pre-set to correspond to different second evaluation levels as needed.

[0060] Different second evaluation levels also correspond to different second rechargeable coefficients. For example, if the second evaluation level is A, the second rechargeable coefficient is 100%, that is, it is charged at 100% of the rated charging power of the charging pile; if the second evaluation level is B, the second rechargeable coefficient is 95%, that is, it is charged at 95% of the rated charging power of the charging pile; if the second evaluation level is C, the second rechargeable coefficient is 90%, that is, it is charged at 90% of the rated charging power of the charging pile, and so on.

[0061] In this embodiment, step S201 and step S202 are not limited to the described action sequence. Step S201 and step S202 can be performed in other sequences or simultaneously.

[0062] S203: Charge the electric vehicle according to the first chargeable coefficient and the second chargeable coefficient.

[0063] In this embodiment, the first rechargeable coefficient and the second rechargeable coefficient respectively determine the amount of charge to be charged and the charging power of the current charge.

[0064] Optionally, the specific implementation method of step S203 can be: determining a first rechargeable power according to a first rechargeable coefficient, determining a second rechargeable power according to a second rechargeable coefficient, selecting the smaller value of the first rechargeable power and the second rechargeable power as the upper limit of the rechargeable power for this charging; charging the electric vehicle according to the upper limit of the rechargeable power.

[0065] For example, if the first rechargeable coefficient is 90% and the second rechargeable coefficient is 95%, then the first rechargeable power is 90% × the battery's required charging power, and the second rechargeable power is 95% × the charging pile's rated charging power. The smaller of the first and second rechargeable powers is selected as the upper limit of the rechargeable power.

[0066] In one example, step S203 is to charge the electric vehicle, including: after starting charging, if it is determined that the battery temperature rise and / or charging current of the electric vehicle is abnormal, then stopping charging.

[0067] Optionally, if the battery temperature reaches a temperature protection threshold or the temperature rise rate reaches a first preset threshold within a first preset time after charging is started, it can be determined that the battery temperature rise of the electric vehicle is abnormal.

[0068] For example, 3 minutes after starting charging, the battery temperature triggers the temperature protection threshold allowed by the battery management system (BMS), or triggers the battery temperature rise change rate threshold allowed by the charging pile, that is, the first preset threshold. It can be determined that the battery temperature rise is abnormal, and the electronic device can instruct the charging pile to stop charging and issue an alarm signal.

[0069] Optionally, if the charging current of the battery remains unchanged or the charging current change rate reaches a second preset threshold within a second preset time period after charging is started, it can be determined that the charging current of the electric vehicle is abnormal.

[0070] For example, 3 minutes after starting charging, the charging current change rate triggers the charging current change rate threshold allowed by the charging pile, that is, the second preset threshold, or the current data remains unchanged, that is, there is an abnormal measurement of the charging pile meter or the electric vehicle meter or other abnormal conditions. At this time, it can be determined that the charging current is abnormal, and the electronic device can instruct the charging pile to stop charging and issue an alarm signal.

[0071] In one example, step S203 is to charge the electric vehicle, including: when starting charging, if it is determined that the input current peak of the charging pile exceeds a preset proportion of the rated current peak, then stopping the charging.

[0072] For example, when the input current peak exceeds 110% of the rated input current peak, the electronic device instructs the charging pile to immediately stop charging and send out an alarm signal.

[0073] In one example, step S203 is to charge the electric vehicle, including: after starting charging, determining that the temperature of the charging gun pole of the charging pile reaches a first preset temperature threshold and the duration reaches a third preset duration, or reaches a second preset temperature threshold, then stopping charging, wherein the temperature represented by the first preset temperature threshold is lower than the temperature represented by the second preset temperature threshold.

[0074] For example, if the charging gun pole temperature reaches 90°C and persists for more than 15 minutes, or if the pole temperature reaches 120°C, the electronic device will instruct the charging pile to stop charging and issue an alarm signal. Alternatively, if the pole temperature reaches 90°C but persists for less than 15 minutes, the electronic device can instruct the charging pile to reduce the charging power and issue an alarm signal.

[0075] In one example, charging the electric vehicle in step S203 includes: after starting charging, if it is determined that the battery of the electric vehicle has at least one of overvoltage, overcurrent, short circuit and abnormal SOC change curve, then stopping charging.

[0076] For example, when the charging voltage exceeds the charging voltage value allowed by the BMS or reaches a custom charging voltage protection threshold, it can be determined that the battery is overvoltage. The electronic device can instruct the charging pile to immediately cut off the DC output and issue an alarm signal.

[0077] For example, when the charging current continuously exceeds 115% of the rated output current, or reaches a custom charging current protection threshold, it can be determined that the battery has an overcurrent. The electronic device can instruct the charging pile to immediately cut off the DC output and issue an alarm signal.

[0078] For example, when a short circuit is detected at the output of a charging pile, the electronic device can instruct the charging pile to immediately limit the output current and cut off the DC output, while issuing an alarm signal.

[0079] For another example, after charging for a preset time, if it is detected that the battery SOC change curve is abnormal compared with the historical normal charging SOC change curve, the electronic device can instruct the charging pile to stop charging and issue an alarm signal.

[0080] The electric vehicle safe charging method provided in this embodiment comprehensively considers the safety of equipment on both the charging and discharging sides by evaluating the chargeability coefficient of the electric vehicle battery and the chargeability coefficient of the charging pile, thereby reducing the risk of accidents during electric vehicle charging.

[0081] Figure 3 FIG1 shows a flow chart of another electric vehicle safety charging method provided by an embodiment of the present application. Figure 3 As shown, with the electronic device as the execution subject, the method of this embodiment may include the following steps:

[0082] S301 : Evaluate the charging safety level of the electric vehicle based on historical battery charging data of the electric vehicle, and determine a first evaluation level of the electric vehicle, where different first evaluation levels correspond to different first chargeability coefficients.

[0083] S302: Evaluate the life of the charging pile to determine a second evaluation level of the charging pile, where different second evaluation levels correspond to different second rechargeable coefficients. The charging pile is used to charge electric vehicles.

[0084] S303: Charge the electric vehicle according to the first chargeable coefficient and the second chargeable coefficient.

[0085] In this embodiment, steps S301-S303 are respectively Figure 2 The implementation of steps S201-S203 in the embodiment is similar and will not be repeated here in this embodiment.

[0086] S304: After stopping charging and before unplugging the charging gun, if it is determined that the temperature of the charging gun pole is abnormal, at least two indication messages are sent to the charging pile, and both indication messages are used to instruct to disconnect the electronic lock of the charging gun.

[0087] In this embodiment, the indication information is sent twice to ensure that the charging gun is in an unlocked state when the temperature of the charging gun pole is abnormal.

[0088] The electric vehicle safety charging method provided in this embodiment comprehensively considers the safety of equipment on both the charging and discharging sides by evaluating the rechargeable coefficient of the electric vehicle battery and the rechargeable coefficient of the charging pile. At the same time, during the static stage after charging is completed, that is, after charging is stopped and before the charging gun is pulled out, the electronic lock of the charging gun is disconnected twice in succession when the temperature of the charging gun pole is abnormal, thereby avoiding thermal runaway inducements accumulated during the charging process and causing thermal runaway in the static stage after charging, which may lead to safety accidents.

[0089] Figure 4 FIG1 shows a flow chart of another electric vehicle safety charging method provided by an embodiment of the present application. Figure 4 As shown, with the electronic device as the execution subject, the method of this embodiment may include three stages: a stage before starting charging, a stage during charging, and a stage of rest after charging.

[0090] During the pre-charging phase, the charging gun of the charging pile is connected to the electric vehicle. Electronic equipment communicating with the charging pile performs a lifespan assessment on the charging pile's electrical components to determine the charging pile's rechargeability factor. The electronic equipment then identifies the electric vehicle's VIN code and assesses the vehicle's charging safety level to determine the electric vehicle's rechargeability factor. Based on the electric vehicle's rechargeability factor and the charging pile's rechargeability factor, the rechargeable power of the electric vehicle and the charging pile are calculated, respectively, to determine whether charging power limits are required. If limits are required, the lower of the electric vehicle's and the charging pile's rechargeable power limits is used as the upper limit for charging power. During the charging process, charging proceeds according to the upper limit. If limits are not required, the charging process proceeds directly to the charging process.

[0091] During the charging process, first start charging according to the international standard charging process, and the existing technology will not be explained. After starting charging, determine whether there are input current peak overcurrent, charging overvoltage, overcurrent, short circuit, charging gun overtemperature, battery temperature rise abnormality, charging current abnormality, SOC change curve abnormality and other phenomena. If any of them occurs, the charging will be stopped immediately and an alarm signal will be issued. If there is no abnormality, the charging will enter the static stage after charging. The judgment process can be referred to Figure 2 The embodiments are understood and will not be described in detail here.

[0092] During the post-charging standby phase, after the electric vehicle has finished charging, the system monitors the terminal temperature in real time before the user unplugs the charging gun to see if it is abnormal. If so, the system disconnects the charging gun's electronic lock twice to ensure successful disconnection and reports an alarm. If not, the system waits for the user to unplug the charging gun to terminate charging.

[0093] The electric vehicle safe charging method provided in this embodiment ensures the safety of the electric vehicle at each charging stage by monitoring the three stages: the pre-charging stage, the charging process stage, and the static stage after charging, thereby reducing the risk of accidents caused by electric vehicle charging.

[0094] Figure 5 FIG1 shows a schematic structural diagram of a safe charging device for electric vehicles provided by an embodiment of the present application. Figure 5 As shown, the electric vehicle safety charging device 50 of this embodiment is used to implement the operation corresponding to the electronic device in any of the above method embodiments. The electric vehicle safety charging device 50 of this embodiment includes:

[0095] A first evaluation module 501 is configured to evaluate the charging safety level of the electric vehicle based on historical battery charging data of the electric vehicle, and determine a first evaluation level of the electric vehicle, where different first evaluation levels correspond to different first rechargeability coefficients;

[0096] A second evaluation module 502 is configured to evaluate the life of the charging pile and determine a second evaluation level of the charging pile, wherein different second evaluation levels correspond to different second rechargeable coefficients. The charging pile is used to charge electric vehicles;

[0097] The charging module 503 is configured to charge the electric vehicle according to the first chargeable coefficient and the second chargeable coefficient.

[0098] The electric vehicle safety charging device 50 provided in the embodiment of the present application can execute the above method embodiment. Its specific implementation principles and technical effects can be found in the above method embodiment, and this embodiment will not be repeated here.

[0099] Figure 6 FIG1 shows a hardware structure diagram of an electronic device provided by an embodiment of the present application. Figure 6 As shown, the electronic device 60 is used to implement the operations corresponding to the electronic device in any of the above method embodiments. The electronic device 60 of this embodiment may include: a memory 601, a processor 602 and a communication interface (not shown in the figure).

[0100] Memory 601 is used to store computer programs. Memory 601 may include high-speed random access memory (RAM) or non-volatile memory (NVM), such as at least one disk memory. It may also be a USB flash drive, a mobile hard drive, a read-only memory, a magnetic disk, or an optical disk.

[0101] The processor 602 is used to execute the computer program stored in the memory to implement the electric vehicle safe charging method in the above embodiment. For details, please refer to the relevant description in the above method embodiment. The processor 602 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor can be a microprocessor or the processor can be any conventional processor, etc. The steps of the method disclosed in the invention can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor.

[0102] Optionally, the memory 601 may be independent or integrated with the processor 602 .

[0103] When the memory 601 is a device independent of the processor 602, the electronic device 60 may further include a bus. The bus is used to connect the memory 601 and the processor 602. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of this application are not limited to only one bus or one type of bus.

[0104] The communication interface can be connected to the processor 602 via a bus. The processor 602 can control the communication interface 24 to implement the signal receiving and sending functions.

[0105] The electronic device 60 provided in this embodiment can be used to execute the above-mentioned electric vehicle safe charging method. Its implementation method and technical effects are similar and will not be described in detail in this embodiment.

[0106] The present application also provides a computer-readable storage medium, in which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, it is used to implement the methods provided in the various embodiments described above.

[0107] Among them, the computer-readable storage medium can be a computer storage medium or a communication medium. The communication medium includes any medium that facilitates the transmission of a computer program from one place to another. The computer storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer. For example, a computer-readable storage medium is coupled to a processor so that the processor can read information from the computer-readable storage medium and write information to the computer-readable storage medium. Of course, the computer-readable storage medium can also be an integral part of the processor. The processor and the computer-readable storage medium can be located in an application-specific integrated circuit (ASIC). In addition, the ASIC can be located in a user device. Of course, the processor and the computer-readable storage medium can also exist in a communication device as discrete components.

[0108] Specifically, the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random-access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0109] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods, such as multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0110] The modules may be physically separate, for example, installed in different locations on a single device, or installed on different devices, or distributed across multiple network units, or distributed across multiple processors. The modules may also be integrated, for example, installed in the same device, or integrated into a set of codes. The modules may exist in the form of hardware, or in the form of software, or may be implemented in the form of software plus hardware. The present application may select some or all of the modules according to actual needs to achieve the purpose of the present embodiment.

[0111] It should be understood that, although the various steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they may be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but may be performed at different times, and their execution order is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of sub-steps or stages of other steps.

[0112] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0113] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that they may modify the technical solutions described in the aforementioned embodiments or replace some or all of the technical features therein with equivalents. However, such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the various embodiments of this application.

Claims

1. A safe charging method for electric vehicles, characterized in that: The method comprises: Evaluate the charging safety level of the electric vehicle based on historical battery charging data, and determine a first evaluation level of the electric vehicle, where different first evaluation levels correspond to different first rechargeable coefficients; the first rechargeable coefficient is a ratio of the battery's charging power to a current state of charge (SOC) requirement; Performing a lifespan assessment on a charging pile to determine a second assessment level of the charging pile, where different second assessment levels correspond to different second rechargeability coefficients, the charging pile being used to charge the electric vehicle; the second rechargeability coefficient being a ratio of the charging power of the charging pile to the rated charging power; determining a first chargeable power according to the first chargeable coefficient; determining a second chargeable power according to the second chargeable coefficient; determining an upper limit of a rechargeable power for the current charge according to the smaller value of the first rechargeable power and the second rechargeable power; The electric vehicle is charged according to the upper limit of the chargeable power.

2. The method according to claim 1, characterized in that The charging of the electric vehicle comprises: After charging is started, if it is determined that the battery temperature rise of the electric vehicle is abnormal and / or the charging current is abnormal, charging is stopped.

3. The method according to claim 2, characterized in that The determining whether the battery temperature rise of the electric vehicle is abnormal and / or the charging current is abnormal includes: After charging is started, determining whether the temperature of the battery reaches a temperature protection threshold or the temperature rise rate reaches a first preset threshold within a first preset time period; And / or, determining that within a second preset time period, the charging current of the battery remains unchanged or the charging current change rate reaches a second preset threshold.

4. The method according to claim 1, wherein The charging of the electric vehicle comprises: When starting charging, if it is determined that the input current peak of the charging pile exceeds a preset proportion of the rated current peak, the charging is stopped.

5. The method according to claim 1, wherein The charging of the electric vehicle comprises: After starting charging, if it is determined that the temperature of the charging gun pole of the charging pile reaches the first preset temperature threshold and the duration reaches the third preset duration, or reaches the second preset temperature threshold, charging is stopped, wherein the temperature represented by the first preset temperature threshold is lower than the temperature represented by the second preset temperature threshold.

6. The method according to any one of claims 1 to 5, characterized in that After charging the electric vehicle, the method further includes: After stopping charging and before pulling out the charging gun, if it is determined that the temperature of the charging gun pole is abnormal, at least two indication messages are sent to the charging pile, and both indication messages are used to instruct to disconnect the electronic lock of the charging gun.

7. A safe charging device for electric vehicles, characterized in that: The device comprises: a first evaluation module, configured to evaluate a charging safety level based on historical battery charging data of the electric vehicle and determine a first evaluation level of the electric vehicle, wherein different first evaluation levels correspond to different first rechargeable coefficients; the first rechargeable coefficient is a ratio of the battery's charging power to a current state of charge (SOC) requirement; a second evaluation module, configured to evaluate the life of the charging pile and determine a second evaluation level of the charging pile, wherein different second evaluation levels correspond to different second rechargeable coefficients, the charging pile being used to charge the electric vehicle; the second rechargeable coefficient being a ratio of the charging power of the charging pile to the rated charging power; a charging module, configured to determine a first rechargeable power according to the first rechargeable coefficient; determining a second chargeable power according to the second chargeable coefficient; determining an upper limit of a rechargeable power for the current charge according to the smaller value of the first rechargeable power and the second rechargeable power; The electric vehicle is charged according to the upper limit of the chargeable power.

8. An electronic device, characterized in that: The device includes: a memory and a processor; The memory is used to store computer programs; The processor is used to execute the computer program stored in the memory to implement the electric vehicle safe charging method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, is used to implement the electric vehicle safe charging method according to any one of claims 1 to 6.

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