New Energy Vehicle Charging Protection Method and Related Equipment

Abstract

The present invention discloses a charging protection method and related equipment for new energy vehicles, which relates to the field of vehicle battery charging and mainly solves the problem of lacking a better method to prevent overcurrent in vehicle batteries during charging. The method includes: when receiving a charging interruption signal of the power battery, recording the first battery voltage of the power battery; obtaining a recharging signal after the charging interruption; based on the recharging signal, obtaining the second battery voltage of the power battery during recharging; and determining the recharging current of the power battery based on the first battery voltage and the second battery voltage. The present invention is used in the charging protection process of new energy vehicles.

Description

Technical Field

[0001] The present invention relates to the field of vehicle battery charging, and particularly to a charging protection method for new energy vehicles and related equipment. Background Art

[0002] The charging strategy of the power battery of existing new energy vehicles is calibrated according to the charging strategy provided by the battery manufacturer. The maximum current that the battery can allow to be charged is judged based on the current temperature and voltage of the battery. Currently, during the charging process of the power battery, after the charging is interrupted due to other factors, overcharging is likely to occur during the subsequent charging, which affects the battery life and is prone to safety hazards. Summary of the Invention

[0003] In view of the above problems, the present invention provides a charging protection method for new energy vehicles and related equipment, mainly aiming to solve the problem of lacking a better method to prevent overcurrent in vehicle batteries during charging.

[0004] To solve the above-mentioned at least one technical problem, in a first aspect, the present invention provides a charging protection method for new energy vehicles, the method comprising:

[0005] When receiving a charging interruption signal of the power battery, record the first battery voltage of the power battery;

[0006] Obtain a recharging signal after the charging interruption;

[0007] Based on the recharging signal, obtain the second battery voltage of the power battery during recharging;

[0008] Based on the first battery voltage and the second battery voltage, determine the recharging current of the power battery.

[0009] Optionally, the method further comprises:

[0010] Based on the first battery voltage, determine the first charging current of the power battery;

[0011] Based on the second battery voltage, determine the second charging current of the power battery.

[0012] Optionally,

[0013] Determine the smaller charging current among the first charging current and the second charging current as the recharging current of the power battery.

[0014] Optionally, the determining the first charging current of the power battery based on the first battery voltage includes:

[0015] Determine the first charging current of the power battery based on the above first battery voltage and the highest / lowest battery temperature corresponding to the above first battery voltage;

[0016] Determining the second charging current of the power battery based on the above second battery voltage includes:

[0017] Determine the second charging current of the power battery based on the above second battery voltage and the highest / lowest battery temperature corresponding to the above second battery voltage.

[0018] Optionally, the above recharging current is the maximum current for the power battery to be recharged again.

[0019] Optionally, the above method further includes:

[0020] Obtain the first interrupted charging duration;

[0021] When the above first interrupted charging duration is less than the first preset duration, record the above first battery voltage, the highest / lowest battery temperature corresponding to the above first battery voltage, the above first interrupted charging duration, and the above recharging current in an associated manner.

[0022] Optionally, the above method further includes:

[0023] When the power battery has a charging interruption again, record the second interrupted charging duration of the recharging interruption;

[0024] When the difference between the above second interrupted charging duration and the above first interrupted charging duration is less than the second preset duration, query the recharging current based on the above first battery voltage, the highest / lowest battery temperature corresponding to the above first battery voltage, and the above first interrupted charging duration recorded before the current charging interruption.

[0025] In a second aspect, an embodiment of the present invention further provides a charging protection device for a new energy vehicle, including:

[0026] A recording unit, configured to record the first battery voltage of the power battery when receiving a charging interruption signal of the power battery;

[0027] An obtaining unit, configured to obtain a recharging signal after the charging interruption;

[0028] A second obtaining unit, configured to obtain the second battery voltage of the power battery during recharging based on the above recharging signal;

[0029] A determining unit, configured to determine the recharging current of the power battery based on the above first battery voltage and the above second battery voltage.

[0030] To achieve the above object, according to a third aspect of the present invention, there is provided a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, and when the program is executed by a processor, the above-mentioned new energy vehicle charging protection method is implemented.

[0031] To achieve the above object, according to a fourth aspect of the present invention, there is provided an electronic device, including at least one processor and at least one memory connected to the processor; wherein, the processor is configured to call program instructions in the memory to execute the above-mentioned new energy vehicle charging protection method.

[0032] By means of the above technical solution, for the problem that there is a lack of a better method to prevent the vehicle battery from overcurrent during vehicle charging in the new energy vehicle charging protection method and related devices provided by the present invention, the present invention records the first battery voltage of the power battery when receiving a charging interruption signal of the power battery; obtains a recharging signal after the charging interruption; based on the recharging signal, obtains the second battery voltage when the power battery is recharged again; and determines the recharging current of the power battery based on the first battery voltage and the second battery voltage. In the above solution, in the case of a charging interruption of the power battery, based on the first battery voltage before the charging interruption of the power battery and the second battery voltage when the power battery continues to charge after the charging interruption, the optimal charging current suitable for the power battery to continue charging after the charging interruption is determined. Since rechargeable batteries or storage batteries are reversible, when the external power supply voltage is greater than the battery voltage, the battery is charged, and electrical energy is converted into chemical energy and stored. When the external power supply voltage is low, the chemical energy is converted into electrical energy to supply power to the load and can maintain the voltage stability at both ends of the load. Capacitors also have this function and can make the voltage ripple smaller, which is usually referred to as filtering. When the external power supply voltage is high, the capacitor is charged, and the capacitor stores more charges, but the electrical energy is not stored by chemical methods. When the voltage is low (referring to the pulsating direct current after rectification), the capacitor discharges, so the voltage will drop a little. During the fast charging process, if the battery charging is interrupted for a period of time due to other reasons, at this time, the battery voltage will drop a little due to its own characteristics. If the charging gun is plugged in again at this time, the current value that the actual voltage can allow to charge is less than the current value that the battery voltage can allow to charge after it drops, resulting in the battery current exceeding its own actual allowable upper limit for charging, which poses a safety hazard and will also have a significant impact on the battery life in the long run. The above charging protection method can avoid the battery current exceeding its own allowable upper limit, thereby improving the battery life and reducing safety hazards.

[0033] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following specifically illustrates the specific embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0035] Figure 1 A schematic flowchart of a method for charging protection of a new energy vehicle provided by an embodiment of the present invention is shown;

[0036] Figure 2 A schematic block diagram of the composition of a charging protection device for a new energy vehicle provided by an embodiment of the present invention is shown;

[0037] Figure 3 A schematic block diagram of the composition of a charging protection electronic device for a new energy vehicle provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0039] In order to solve the problem of lacking a better way to prevent overcurrent in the vehicle battery during charging, an embodiment of the present invention provides a method for charging protection of a new energy vehicle, as Figure 1 shown, the method includes:

[0040] S101. When receiving a charging interruption signal of the power battery, record the first battery voltage of the power battery;

[0041] Exemplarily, when the new energy vehicle is charging normally, sudden situations may occur during charging to interrupt the charging. When it is determined that the charging of the power battery is interrupted, record the first battery voltage of the power battery. It should be noted that the first battery voltage of the power battery can be the battery voltage of the power battery at the time of charging interruption, or the battery voltage of the power battery before charging interruption. There is no excessive limitation here, and the most suitable value of the battery voltage of the power battery at the time of charging interruption and the battery voltage of the power battery before charging interruption is taken for recording.

[0042] S102. Obtain a recharging signal after the charging interruption;

[0043] Exemplarily, after the above power battery charging is interrupted for a period of time and then continues to charge, based on the recharging signal after the above charging interruption, this solution is continued to be executed. It should be noted that the time interval between the recharging after the charging interruption should not be too long. If it exceeds the preset time, it does not belong to the recharging after the charging interruption but belongs to direct charging, and this solution will no longer be executed. Since the power batteries of different vehicles are different, the preset time here is not overly limited.

[0044] S103. Based on the above recharging signal, obtain the second battery voltage of the above power battery during recharging;

[0045] Exemplarily, set the battery voltage of the above power battery during recharging as the second battery voltage, obtain and record it.

[0046] S104. Based on the above first battery voltage and the above second battery voltage, determine the recharging current of the above power battery.

[0047] Exemplarily, based on the first battery voltage determined in the above steps and the second battery voltage during recharging, further determine the current corresponding to the first battery voltage and the current corresponding to the second battery voltage, determine the minimum value among the two currents, and use this as the recharging current of the above power battery.

[0048] Exemplarily, it should be noted that as the voltage increases, the current that can be allowed to pass first increases and then decreases. That is, only when the voltage is at an intermediate value, the current that can be allowed to pass is the largest. In actual situations, it is impossible to determine whether the above first battery voltage is greater than the voltage corresponding to the maximum current that can be allowed to pass or less than the voltage corresponding to the maximum current that can be allowed to pass. Therefore, it is also impossible to determine whether the recharging current of the above power battery should increase or decrease only based on the fact that the above second battery voltage is less than the above first battery voltage. For example, in the case where the above first battery voltage is greater than the voltage corresponding to the maximum current that can be allowed to pass, the above battery voltage and the current that can be allowed to pass are inversely proportional; in the case where the above first battery voltage is less than the voltage corresponding to the maximum current that can be allowed to pass, the above battery voltage and the current that can be allowed to pass are directly proportional. Even if the voltage drops after the charging is interrupted, it is uncertain whether the corresponding current that can be allowed to pass increases or decreases, and at the same time, it is also affected by other factors. Therefore, the judgment procedure of this solution still needs to be executed.

[0049] With the above technical solution, the new energy vehicle charging protection method provided by the present invention addresses the problem of lacking a better way to prevent overcurrent in the vehicle battery during charging. The present invention records the first battery voltage of the power battery when receiving a charging interruption signal of the power battery; obtains a recharging signal after the charging interruption; based on the recharging signal, obtains the second battery voltage during the recharging of the power battery; and determines the recharging current of the power battery based on the first battery voltage and the second battery voltage. In the above solution, in the case of a charging interruption of the power battery, based on the first battery voltage before the charging interruption of the power battery and the second battery voltage during the continued charging after the charging interruption of the power battery, the optimal charging current suitable for the continued charging after the charging interruption of the power battery is determined. Due to the characteristics of the battery itself, during the fast charging process, the chemical reaction of the battery is intense. If the battery charging is interrupted for a period of time due to other reasons during this process, at this time, the battery voltage will drop a little due to its own characteristics. If the charging gun is plugged in again at this time, the current value that the actual voltage can allow to charge is less than the current value that the battery voltage can allow to charge after the drop, resulting in the battery current exceeding the upper limit actually allowed by itself for charging, posing a safety hazard. In the long run, it will also have a significant impact on the battery life. The above charging protection method can avoid the battery current exceeding the upper limit allowed by itself, thereby improving the battery life and reducing safety hazards.

[0050] In one embodiment, the above method further includes:

[0051] Determine the first charging current of the power battery based on the first battery voltage;

[0052] Determine the second charging current of the power battery based on the second battery voltage.

[0053] Exemplarily, determine the first battery voltage between the battery voltage of the power battery during charging interruption and the battery voltage of the power battery before charging interruption, and then determine the first charging current of the power battery corresponding to this voltage; after the charging is resumed, determine the second charging current corresponding to this voltage based on the second battery voltage during the recharging of the power battery.

[0054] In one embodiment,

[0055] Determine the smaller charging current among the first charging current and the second charging current as the recharging current of the power battery.

[0056] Exemplarily, compare the first charging current determined by the first battery voltage and the second charging current determined by the second battery voltage, determine the minimum value among the two currents, and use this current as the standard to recharge the power battery.

[0057] In one embodiment, determining the first charging current of the power battery based on the first battery voltage includes:

[0058] Determining the first charging current of the power battery based on the first battery voltage and the highest / lowest battery temperature corresponding to the first battery voltage;

[0059] Determining the second charging current of the power battery based on the second battery voltage includes:

[0060] Determining the second charging current of the power battery based on the second battery voltage and the highest / lowest battery temperature corresponding to the second battery voltage.

[0061] Exemplarily, the battery system is composed of battery blocks of multiple battery cells, and a device for detecting the temperature of each battery cell is installed inside the battery system. Before charging interruption, the temperatures of multiple battery cells are acquired and recorded, and a highest temperature and a lowest temperature can be determined among them; after charging continues, the highest temperature and the lowest temperature of the multiple battery cells that continue to be acquired are obtained. Combining the above first battery voltage and the highest / lowest battery temperature before charging interruption to determine a current value; combining the above second battery voltage and the highest / lowest temperature of the battery after continued charging to determine a current value, comparing the two current values, taking the minimum value, and finally determining the second charging current of the power battery. It should be noted that this corresponding relationship can determine a corresponding table based on experiments or actual data collection, etc., and determine the recharging current of the voltage most suitable for charging the above power battery based on this table. It should be noted that because the power batteries of different vehicle models are different, the specific form of this table is not specifically limited here. Thus, it is possible to determine a minimum current that the current battery can allow to pass based on two situations before and after charging interruption, thereby preventing the occurrence of battery overcurrent.

[0062] For example: Assume that during the charging process, the highest and lowest temperatures of the battery are 35 and 25 °C respectively (if there is no such temperature value in the look-up table, interpolation method is used to supplement it), and the charging voltage is 3.973 V. Then the maximum current value allowed to pass determined by looking up the table at this time is 0.89. If charging is interrupted at this time, due to the characteristics of the battery itself, the voltage drops to 3.785 V after a period of time. Assume that the highest and lowest temperatures of the battery are still 35 and 25 °C. When charging again, the maximum charging current multiple allowed is 1.36, which is greater than 0.89 before. At this time, the minimum value between the two, that is, 0.89, should be taken and used as the standard for charging.

[0063] In one embodiment, the recharging current is the maximum current for the power battery to be recharged again.

[0064] Exemplarily, it should be noted that the above power battery should be charged based on the maximum charging current.

[0065] In one embodiment, the above method further includes:

[0066] Obtain the first interrupted charging duration;

[0067] When the first interrupted charging duration is less than the first preset duration, record the first battery voltage, the battery highest / lowest temperature corresponding to the first battery voltage, the first interrupted charging duration, and the recharging current in an associated manner.

[0068] Exemplarily, record the charging interruption time and the recharging time, and then determine the first interrupted charging duration based on the difference between the two. When the first interrupted charging duration is less than the first preset duration, it proves that the conditions for implementing this solution are met. At this time, record the first battery voltage, the battery highest / lowest temperature corresponding to the first battery voltage, the first interrupted charging duration, and the recharging current. No excessive limitation is imposed on the first preset duration here. It can be more than ten seconds or several minutes. The specific value will be affected by the ambient temperature. Thus, exclude the invalid data obtained when charging is resumed after a long interval at the charging terminal, improve the accuracy of implementing this solution, and further provide a more accurate data basis for the subsequent operation of this solution.

[0069] In one embodiment, the above method further includes:

[0070] When the power battery has another charging interruption, record the second interrupted charging duration of the recharging interruption;

[0071] When the difference between the second interrupted charging duration and the first interrupted charging duration is less than the second preset duration, query the recharging current based on the first battery voltage before the current charging interruption, the battery highest / lowest temperature corresponding to the first battery voltage, and the first interrupted charging duration recorded.

[0072] Exemplarily, if the above-mentioned power battery experiences another charging interruption and is recharged, obtain the above-mentioned second interrupted charging duration, and compare the above-mentioned second interrupted charging duration with the previously recorded first interrupted charging duration. When the difference between the above-mentioned second interrupted charging duration and the above-mentioned first interrupted charging duration is less than the second preset duration, it is proved that the interrupted charging durations of the two are similar. At this time, compare the first battery voltage before the current charging interruption, the highest / lowest battery temperature corresponding to the first battery voltage before the current charging interruption, and the first interrupted charging duration obtained this time, with the above-mentioned first battery voltage before the previously recorded charging interruption, the highest / lowest battery temperature corresponding to the above-mentioned first battery voltage before the charging interruption, and the above-mentioned first interrupted charging duration. When the differences are all less than the preset value, it is considered that the basic data after this power outage and recharging is not much different from the previous time. When the difference between the basic data and the previously occurred data value is not much different, it can be understood that the current change affected by the basic data is not significant either. Then, this charging can be carried out based on the previously recorded recharging current, thus avoiding the trouble of recording data and comparing again.

[0073] For example: Assume that during the charging process, the highest and lowest temperatures of the battery are 35 and 25 °C respectively (if there is no such temperature value in the look-up table, use the interpolation method to supplement it), and the charging voltage is 3.973 V. Then, the maximum current value allowed determined by looking up the table at this time is 0.89. If the charging is interrupted at this time and then recharged again, the interrupted duration is 1 minute. Due to the battery's own characteristics, the voltage drops to 3.785 V after a period of time. Assume that the highest and lowest temperatures of the battery are still 35 and 25 °C. When recharging again, the maximum charging current rate allowed is 1.36, which is greater than the previous 0.89. At this time, the minimum value between the two, that is, 0.89, should be taken as the standard for charging. Record the above data. When the charging is interrupted again, it is detected that the highest and lowest temperatures of the battery before the interrupted charging are 34 and 24 °C respectively, the charging voltage is 3.952 V, and the interrupted duration is 55 seconds. The basic data of each item is not much different from the previously recorded data. Therefore, this step of comparing sizes is not carried out this time, and the previous value of 0.89 is directly retrieved for charging.

[0074] Furthermore, as an implementation of the above Figure 1 shown method, the embodiment of the present invention also provides a charging protection device for a new energy vehicle, which is used to implement the above Figure 1 shown method. The device embodiment corresponds to the foregoing method embodiment. For the convenience of reading, the details of the foregoing method embodiment will not be repeated one by one in this device embodiment. However, it should be clear that the device in this embodiment can correspondingly implement all the contents of the foregoing method embodiment. As Figure 2As shown, the device includes: a recording unit 21, an acquisition unit 22, a second acquisition unit 23, and a determination unit 24, where

[0075] The recording unit 21 is configured to record the first battery voltage of the power battery when receiving a charging interruption signal of the power battery.

[0076] The acquisition unit 22 is configured to acquire a recharging signal after the charging interruption.

[0077] The second acquisition unit 23 is configured to acquire the second battery voltage during the recharging of the power battery based on the recharging signal.

[0078] The determination unit 24 is configured to determine the recharging current of the power battery based on the first battery voltage and the second battery voltage.

[0079] Exemplarily, the method further includes:

[0080] Determining the first charging current of the power battery based on the first battery voltage;

[0081] Determining the second charging current of the power battery based on the second battery voltage.

[0082] Exemplarily,

[0083] Determining the smaller charging current of the first charging current and the second charging current as the recharging current of the power battery.

[0084] Exemplarily, the determining the first charging current of the power battery based on the first battery voltage includes:

[0085] Determining the first charging current of the power battery based on the first battery voltage and the highest / lowest battery temperature corresponding to the first battery voltage;

[0086] The determining the second charging current of the power battery based on the second battery voltage includes:

[0087] Determining the second charging current of the power battery based on the second battery voltage and the highest / lowest battery temperature corresponding to the second battery voltage.

[0088] Exemplarily, the recharging current is the maximum current for the power battery to be recharged again.

[0089] Exemplarily, the method further includes:

[0090] Acquiring the first interrupted charging duration;

[0091] When the first interrupted charging duration is less than the first preset duration, record the first battery voltage, the highest / lowest battery temperature corresponding to the first battery voltage, the first interrupted charging duration, and the recharging current in an associated manner.

[0092] Exemplarily, the method further includes:

[0093] When the power battery experiences a charging interruption again, record the second interrupted charging duration of the re - interruption.

[0094] When the difference between the second interrupted charging duration and the first interrupted charging duration is less than the second preset duration, query the recharging current based on the first battery voltage before the current charging interruption, the highest / lowest battery temperature corresponding to the first battery voltage, and the first interrupted charging duration recorded.

[0095] With the above - mentioned technical solution, the new - energy vehicle charging protection device provided by the present invention aims to solve the problem of lacking a better way to prevent over - current in the vehicle battery during charging. When receiving a charging interruption signal of the power battery, the present invention records the first battery voltage of the power battery; obtains a recharging signal after the charging interruption; based on the recharging signal, obtains the second battery voltage during the recharging of the power battery; and determines the recharging current of the power battery based on the first battery voltage and the second battery voltage. In the above solution, when the power battery experiences a charging interruption, based on the first battery voltage before the charging interruption of the power battery and the second battery voltage during the continued charging after the charging interruption of the power battery, the optimal charging current suitable for the continued charging after the charging interruption of the power battery is determined. Due to the characteristics of the battery itself, during the fast - charging process, the chemical reaction of the battery is intense. If the battery charging is interrupted for a period of time due to other reasons during this process, at this time, the battery voltage will drop a little due to its own characteristics. If the charging gun is plugged in again at this time, the current value that the actual voltage can allow to charge is less than the current value that the battery voltage can allow to charge after the drop, resulting in the battery current exceeding its own actual allowable upper limit for charging, which poses a safety hazard and will also have a significant impact on the battery life in the long run. The above - mentioned charging protection method can avoid the battery current exceeding its own allowable upper limit, thereby improving the battery life and reducing safety hazards. The processor contains a kernel, and the kernel retrieves the corresponding program unit from the memory. One or more kernels can be set, and by adjusting the kernel parameters, a new - energy vehicle charging protection method can be realized, which can solve the problem of lacking a better way to prevent over - current in the vehicle battery during charging.

[0096] The embodiment of the present invention provides a computer - readable storage medium. The computer - readable storage medium includes a stored program, and when the program is executed by a processor, the above - mentioned new - energy vehicle charging protection method is realized.

[0097] An embodiment of the present invention provides a processor, which is used to run a program. When the program runs, it executes the new energy vehicle charging protection method described above.

[0098] An embodiment of the present invention provides an electronic device, which includes at least one processor and at least one memory connected to the processor; wherein, the processor is used to call program instructions in the memory to execute the new energy vehicle charging protection method as described above.

[0099] An embodiment of the present invention provides an electronic device 30, as Figure 3 shown, the electronic device includes at least one processor 301, at least one memory 302 connected to the processor, and a bus 303; wherein, the processor 301 and the memory 302 complete communication with each other through the bus 303; the processor 301 is used to call program instructions in the memory to execute the new energy vehicle charging protection method described above.

[0100] The intelligent electronic device in this article can be a PC, PAD, mobile phone, etc.

[0101] The present application also provides a computer program product, which, when executed on a process management electronic device, is suitable for executing a program initialized with the following method steps: when receiving a charging interruption signal of a power battery, record the first battery voltage of the power battery; obtain a recharging signal after the charging interruption; based on the recharging signal, obtain the second battery voltage when the power battery is recharged again; based on the first battery voltage and the second battery voltage, determine the recharging current of the power battery.

[0102] Further, the above method further includes:

[0103] Determine the first charging current of the power battery based on the first battery voltage;

[0104] Determine the second charging current of the power battery based on the second battery voltage.

[0105] Further,

[0106] Determine the smaller charging current of the first charging current and the second charging current as the recharging current of the power battery.

[0107] Further, the determining the first charging current of the power battery based on the first battery voltage includes:

[0108] Determine the first charging current of the power battery based on the first battery voltage and the highest / lowest battery temperature corresponding to the first battery voltage;

[0109] Determining the second charging current of the power battery based on the above-mentioned second battery voltage includes:

[0110] Determining the second charging current of the power battery based on the above-mentioned second battery voltage and the highest / lowest battery temperature corresponding to the above-mentioned second battery voltage.

[0111] Furthermore, the above-mentioned recharging current is the maximum current for recharging the power battery again.

[0112] Furthermore, the above-mentioned method further includes:

[0113] Obtaining the first interrupted charging duration;

[0114] When the above-mentioned first interrupted charging duration is less than the first preset duration, record the above-mentioned first battery voltage, the highest / lowest battery temperature corresponding to the above-mentioned first battery voltage, the above-mentioned first interrupted charging duration, and the above-mentioned recharging current in an associated manner.

[0115] Furthermore, the above-mentioned method further includes:

[0116] When the power battery experiences a charging interruption again, record the second interrupted charging duration of the re-interruption;

[0117] When the difference between the above-mentioned second interrupted charging duration and the above-mentioned first interrupted charging duration is less than the second preset duration, query the recharging current based on the above-mentioned first battery voltage before the current charging interruption, the highest / lowest battery temperature corresponding to the above-mentioned first battery voltage, and the above-mentioned first interrupted charging duration recorded.

[0118] This application is described with reference to the flowcharts and / or block diagrams of methods, electronic devices (systems), and computer program products according to embodiments of this application. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable process management electronic devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable process management electronic devices generate means for implementing the functions specified in one Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0119] In a typical configuration, an electronic device includes one or more processors (CPUs), a memory, and a bus. The electronic device may also include an input / output interface, a network interface, etc.

[0120] The memory may include non-permanent memory in the form of computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one storage chip. The memory is an example of computer-readable media.

[0121] Computer-readable media includes permanent and non-permanent, removable and non-removable media and can store information by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media of a computer include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage electronic devices, or any other non-transmission media that can be used to store information that can be accessed by a computing electronic device. As defined herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves.

[0122] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or electronic device comprising a series of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, commodity or electronic device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or electronic device comprising the element.

[0123] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0124] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A method for charging protection of a new energy vehicle, characterized in that, it includes: When receiving a charging interruption signal of the power battery, record the first battery voltage of the power battery; Obtain a recharging signal after the charging interruption; Based on the recharging signal, obtain the second battery voltage when the power battery is recharged; Based on the first battery voltage and the second battery voltage, determine the recharging current of the power battery; Based on the first battery voltage and the highest and lowest battery temperatures corresponding to the first battery voltage, determine the first charging current of the power battery; Based on the second battery voltage and the highest and lowest battery temperatures corresponding to the second battery voltage, determine the second charging current of the power battery; Obtain the first interrupted charging duration; When the first interrupted charging duration is less than a first preset duration, record the first battery voltage, the highest and lowest battery temperatures corresponding to the first battery voltage, the first interrupted charging duration, and the recharging current in an associated manner; When the power battery has a charging interruption again, record the second interrupted charging duration of the recharging interruption; When the difference between the second interrupted charging duration and the first interrupted charging duration is less than a second preset duration, query the recharging current based on the first battery voltage, the highest and lowest battery temperatures corresponding to the first battery voltage, and the first interrupted charging duration recorded before the current charging interruption.

2. The method according to claim 1, characterized in that, Determine the smaller charging current of the first charging current and the second charging current as the recharging current of the power battery.

3. The method according to claim 1, characterized in that, The recharging current is the maximum current for the power battery to be recharged again.

4. A charging protection device for a new energy vehicle, characterized in that, it includes: A recording unit, configured to record the first battery voltage of the power battery when receiving a charging interruption signal of the power battery; An obtaining unit, configured to obtain a recharging signal after the charging interruption; A second obtaining unit, configured to obtain the second battery voltage when the power battery is recharged based on the recharging signal; A determining unit, configured to determine the recharging current of the power battery based on the first battery voltage and the second battery voltage; Based on the first battery voltage and the highest and lowest battery temperatures corresponding to the first battery voltage, determine the first charging current of the power battery; Based on the second battery voltage and the highest and lowest battery temperatures corresponding to the second battery voltage, determine the second charging current of the power battery; Obtain the first interrupted charging duration; When the first interrupted charging duration is less than a first preset duration, record the first battery voltage, the highest and lowest battery temperatures corresponding to the first battery voltage, the first interrupted charging duration, and the recharging current in an associated manner; When a charging interruption occurs again in the power battery, record the second interruption charging duration of the repeated charging interruption; When the difference between the second interruption charging duration and the first interruption charging duration is less than a second preset duration, query the recharging current based on the recorded first battery voltage before the current charging interruption, the battery maximum temperature and minimum temperature corresponding to the first battery voltage, and the first interruption charging duration.

5. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein when the program is executed by a processor, the new energy vehicle charging protection method described in any one of claims 1 to 3 is implemented.

6. An electronic device, characterized in that the electronic device includes at least one processor and at least one memory connected to the processor; wherein, the processor is configured to call program instructions in the memory to execute the new energy vehicle charging protection method described in any one of claims 1 to 3.

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