High current charging control method, device, vehicle and storage medium

Abstract

The present invention provides a high-current charging control method, device, vehicle, and storage medium, belonging to the field of vehicle charging control technology. The method includes: when the vehicle is in a charging state, obtaining the vehicle's historical operating status, current battery power, and current ambient temperature; obtaining a preset charging duration, and determining whether to perform a charging current correction based on the current battery power and the preset charging duration; when determining to perform a charging current correction, determining a charging current correction factor based on the historical operating status and the current ambient temperature; correcting the preset charging current based on the charging current correction factor to obtain a corrected charging current, and charging the vehicle based on the corrected charging current; wherein, the temperature of the high-voltage connection system during charging of the vehicle based on the corrected charging current is less than a safety temperature threshold. The present invention ensures that the temperature of the high-voltage connection system is less than the safety temperature threshold when the vehicle is charging, thereby improving the safety of the entire vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging control, and in particular to a high-current charging control method, device, vehicle and storage medium. Background Art

[0002] At present, with the promotion of high-current charging technologies such as super fast charging, the safety issues of heat caused by high-current energy transmission have received more and more attention. The high-voltage connection system, which is the nerve of energy transmission, needs to be continuously increased in size to carry larger currents. The large size means that the wiring harness is hard, the layout space requirements are large, and the cost increases. At present, vehicles, especially heavy-duty commercial vehicles, often require three or even four charging circuits. In order to optimize the layout space and reduce the cost of the whole vehicle, the main manufacturers often use high-voltage connection systems that just meet the limit current carrying capacity. In low temperature environments, the current carrying capacity of the high-voltage connection system meets the requirements. However, in certain high-temperature environments, under continuous limit high current charging, the temperature rise of the high-voltage connection system will exceed the safety limit specified by the national standard. Its cables and terminals may suffer from accelerated thermal aging due to heat accumulation, or even damage, affecting vehicle safety.

[0003] In the existing high-current charging control methods, charging control protection is mainly implemented based on the performance of the connection between the pile end and the vehicle end and the battery cell itself. These technical solutions do not consider the thermal effects of the high-voltage connection system (including power terminals and cables) as a connecting device under different temperature environments, and lack corresponding charging protection strategies. When performing high-current fast charging in certain high-temperature environments, the temperature of the high-voltage connection system, especially the power terminal, exceeds the temperature protection point, which will cause the high-voltage connection system to overheat. During continuous use, thermal aging will be aggravated or even damaged, affecting the safety of the entire vehicle.

[0004] Therefore, there is an urgent need to provide a high-current charging control method, device, vehicle and storage medium to protect the high-voltage connection system from the influence of extreme temperature rise during high-current charging, so as to improve the safety of the entire vehicle during charging. Summary of the Invention

[0005] In view of this, it is necessary to provide a high-current charging control method, device, vehicle and storage medium to solve the technical problem in the prior art that the influence of the high-voltage connection system in high-current charging control is not considered, resulting in the inability to ensure the safety of the entire vehicle during high-current charging.

[0006] On the one hand, in order to solve the above technical problems, the present invention provides a high current charging control method, comprising:

[0007] When the vehicle is in charging state, obtain the vehicle's historical operating status, current battery power and current ambient temperature;

[0008] Obtaining a preset charging duration, and determining whether to perform charging current correction based on the current battery power and the preset charging duration;

[0009] When it is determined to perform charging current correction, determining a charging current correction coefficient based on the historical operating status and the current ambient temperature;

[0010] Correcting a preset charging current based on the charging current correction coefficient to obtain a corrected charging current, and charging the vehicle based on the corrected charging current;

[0011] Wherein, a temperature of a high-voltage connection system during charging of the vehicle based on the corrected charging current is less than a safety temperature threshold.

[0012] In one possible implementation, the determining whether to perform charging current correction based on the current battery power and the preset charging duration includes:

[0013] Determining whether the current battery power is greater than or equal to a threshold power level;

[0014] When the current battery power is greater than or equal to the threshold power, no charging current correction is performed;

[0015] When the current battery power is less than a threshold power, determining whether the preset charging time is greater than a threshold charging time;

[0016] When the preset charging time is greater than the threshold charging time, the charging current is corrected; when the preset charging time is less than or equal to the threshold charging time, the charging current is not corrected.

[0017] In one possible implementation, determining the charging current correction coefficient based on the historical operating status and the current ambient temperature includes:

[0018] determining an ambient temperature correction coefficient based on the historical operating status;

[0019] determining a corrected ambient temperature based on the ambient temperature correction coefficient and the current ambient temperature;

[0020] The charging current correction coefficient is determined based on a pre-calibrated temperature-current correction coefficient mapping relationship and the corrected ambient temperature.

[0021] In one possible implementation, the historical operating status includes historical operating conditions and pre-charging rest time; and determining the ambient temperature correction coefficient based on the historical operating status includes:

[0022] Obtaining a rest time threshold, and determining at least one limit rest time based on historical operating conditions; the limit rest time is less than the rest time threshold;

[0023] determining a plurality of rest time intervals based on the limit rest time and the rest time threshold, and determining a plurality of preset ambient temperature correction coefficients corresponding to the plurality of rest time intervals under historical operating conditions;

[0024] A target interval of the pre-charging rest time is determined based on the plurality of rest time intervals, and an ambient temperature correction coefficient among the plurality of preset ambient temperature correction coefficients is determined based on the target interval.

[0025] In a possible implementation, the historical operating conditions include urban low-speed operating conditions, suburban operating conditions, and high-speed operating conditions.

[0026] In one possible implementation, the extreme rest time includes a first extreme rest time, a second extreme rest time, and a third extreme rest time corresponding to an urban low-speed operating condition, a suburban operating condition, and a high-speed operating condition, respectively, the first extreme rest time being greater than the second extreme rest time, and the second extreme rest time being greater than the third extreme rest time; determining the ambient temperature correction coefficient based on the historical operating state includes:

[0027] When the historical operating condition is an urban low-speed operating condition and the pre-charging rest time is less than or equal to the first limit rest time, the ambient temperature correction coefficient is the first urban low-speed correction coefficient; when the pre-charging rest time is greater than the first limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the second urban low-speed correction coefficient;

[0028] When the historical operating condition is a suburban operating condition and the pre-charging rest time is less than or equal to the second limit rest time, the ambient temperature correction coefficient is the first suburban low-speed correction coefficient; when the pre-charging rest time is greater than the second limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the second suburban correction coefficient;

[0029] When the historical operating condition is a high-speed operating condition and the pre-charging rest time is less than or equal to the third limit rest time, the ambient temperature correction coefficient is the high-speed first correction coefficient; when the pre-charging rest time is greater than the third limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the high-speed second correction coefficient.

[0030] In a possible implementation, the corrected ambient temperature is:

[0031] T rep =T×(1+K)

[0032] Where, T rep To correct for ambient temperature; T is the current ambient temperature; K is the ambient temperature correction factor.

[0033] On the other hand, the present invention also provides a high-current charging control device, comprising:

[0034] A parameter acquisition unit, used to obtain the vehicle's historical operating status, current battery power, and current ambient temperature when the vehicle is in a charging state;

[0035] a charging current correction judgment unit, configured to obtain a preset charging duration and determine whether to perform charging current correction based on the current battery power and the preset charging duration;

[0036] a charging current correction coefficient determining unit, configured to determine the charging current correction coefficient based on the historical operating state and the current ambient temperature when determining to perform charging current correction;

[0037] a charging unit, configured to correct a preset charging current based on the charging current correction coefficient to obtain a corrected charging current, and charge the vehicle based on the corrected charging current;

[0038] Wherein, a temperature of a high-voltage connection system during charging of the vehicle based on the corrected charging current is less than a safety temperature threshold.

[0039] In another aspect, the present invention further provides a vehicle, comprising a memory and a processor, wherein:

[0040] The memory is used to store programs;

[0041] The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps of the high-current charging control method described in any one of the possible implementations above.

[0042] On the other hand, the present invention also provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the high-current charging control method described in any one of the possible implementation methods mentioned above are implemented.

[0043] The beneficial effects of the present invention are as follows: the high-current charging control method provided by the present invention determines whether to perform charging current correction based on the current battery power and the preset charging time, takes into account the influence of the temperature change of the high-voltage connection system on the charging current when the vehicle is charged, and when determining to perform charging current correction, determines the charging current coefficient based on the historical operating status and the current ambient temperature, which can eliminate the influence of the temperature rise of the high-voltage connection system on the charging current, making the vehicle charging more in line with the actual charging conditions, and at the same time, ensures that when the vehicle is charged based on the finally obtained corrected charging current, the temperature of the high-voltage connection system is less than the safety temperature threshold, thereby ensuring the safety of the entire vehicle during the charging process.

[0044] Furthermore, the present invention ensures that the temperature of the high-voltage connection system does not exceed the safety temperature threshold when the vehicle is charged with high current under different ambient temperatures and historical operating conditions without increasing the size of the cables in the high-voltage connection system.

[0045] Furthermore, the present invention takes the historical operating status of the vehicle into consideration when determining the charging current correction coefficient, that is, it can improve the adaptability of the charging current correction coefficient to the historical operating status, further ensuring the accuracy of the determined corrected charging current. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 A schematic flow chart of an embodiment of a high-current charging control method provided by the present invention;

[0048] Figure 2 For the present invention Figure 1 A flowchart of an embodiment of determining whether to perform charging current correction in step S102;

[0049] Figure 3 A schematic diagram of a flow chart of an embodiment of determining a charging current correction coefficient provided by the present invention;

[0050] Figure 4 For the present invention Figure 3 A schematic flow chart of an embodiment of step S301;

[0051] Figure 5 A schematic structural diagram of an embodiment of a high-current charging control device provided by the present invention;

[0052] Figure 6This is a schematic structural diagram of an embodiment of a vehicle provided by the present invention. DETAILED DESCRIPTION

[0053] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0054] It should be understood that the schematic drawings are not drawn to scale. The flowcharts used in the present invention illustrate operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps that have no logical contextual relationship can be reversed in order or implemented simultaneously. In addition, those skilled in the art, guided by the content of the present invention, can add one or more other operations to the flowcharts or remove one or more operations from the flowcharts. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0055] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] The present invention provides a high-current charging control method, device, vehicle, and storage medium, which are described below respectively.

[0057] Figure 1 A flow chart of an embodiment of the high current charging control method provided by the present invention is shown as follows: Figure 1 As shown, the high current charging control method includes:

[0058] S101. When the vehicle is in a charging state, obtain the vehicle's historical operating status, current battery power, and current ambient temperature;

[0059] S102, obtaining a preset charging duration, and determining whether to perform charging current correction based on the current battery power and the preset charging duration;

[0060] S103: When it is determined to perform charging current correction, determine a charging current correction coefficient based on the historical operating status and the current ambient temperature;

[0061] S104. Correcting the preset charging current based on the charging current correction coefficient to obtain a corrected charging current, and charging the vehicle based on the corrected charging current;

[0062] The temperature of the high-voltage connection system during charging of the vehicle based on the corrected charging current is less than a safety temperature threshold.

[0063] It should be noted that the preset charging time in step S102 is a value calibrated in advance.

[0064] It should also be noted that the preset charging time in step S102 and the preset charging current in step S104 are obtained based on the preset charging MAP. The charging MAP records the charging current and charging time under different temperature conditions and different battery power conditions. The charging current and charging time can be obtained based on the current battery power and the current ambient temperature.

[0065] It should be understood that when it is determined not to perform the charging current correction, the preset charging current is determined based on the preset charging MAP, and the vehicle is charged directly based on the preset charging current.

[0066] Compared with the prior art, the high-current charging control method provided in the embodiment of the present invention determines whether to perform charging current correction based on the current battery power and the preset charging time, takes into account the impact of temperature changes of the high-voltage connection system on the charging current when charging the vehicle, and when determining to perform charging current correction, determines the charging current coefficient based on the historical operating status and the current ambient temperature, which can eliminate the impact of the temperature rise of the high-voltage connection system on the charging current, making the vehicle charging more in line with the actual charging conditions. At the same time, it can ensure that when the vehicle is charged based on the final corrected charging current, the temperature of the high-voltage connection system is less than the safety temperature threshold, thereby ensuring the safety of the entire vehicle during the charging process.

[0067] Furthermore, the embodiments of the present invention ensure that the temperature of the high-voltage connection system does not exceed the safety temperature threshold when the vehicle is charged with high current under different ambient temperatures and historical operating conditions without increasing the size of the cables in the high-voltage connection system.

[0068] Furthermore, the embodiment of the present invention takes the historical operating status of the vehicle into consideration when determining the charging current correction coefficient, that is, it can improve the adaptability of the charging current correction coefficient to the historical operating status, further ensuring the accuracy of the determined corrected charging current.

[0069] In some embodiments of the present invention, Figure 2As shown, determining whether to perform charging current correction based on the current battery power and the preset charging time in step S102 includes:

[0070] S201, determining whether the current battery power is greater than or equal to a threshold power level;

[0071] S202: When the current battery power is greater than or equal to the threshold power, no charging current correction is performed;

[0072] S203, when the current battery power is less than the threshold power, determining whether the preset charging time is greater than the threshold charging time;

[0073] S204: When the preset charging time is greater than the threshold charging time, the charging current is corrected; when the preset charging time is less than or equal to the threshold charging time, no charging current correction is performed.

[0074] The embodiment of the present invention improves the accuracy of the judgment on whether the charging current needs to be corrected by judging whether the charging current needs to be corrected based on two parameters: the current battery power and the preset charging time.

[0075] Among them, the threshold charging time refers to the time during which the temperature rise of the high-voltage connection system does not exceed the safe temperature rise.

[0076] Specifically, when the vehicle is charging with a high current, the high-rate charging time varies due to the different current battery levels. The rapid temperature change range of the high-voltage connection system is mainly concentrated in the high-rate charging area. If the charging time in the high-rate charging area is less than the time it takes for the high-voltage connection system to reach the temperature rise safety threshold, the vehicle can maintain high-rate and high-current charging without causing damage to the high-voltage connection system. At this time, there is no need to correct the charging current.

[0077] It should be understood that the threshold power level and threshold charging time can be calibrated or set according to the actual application scenario and vehicle model, and are not specifically limited here.

[0078] In some embodiments of the present invention, Figure 3 As shown, the step S103 of determining the charging current correction coefficient based on the historical operating status and the current ambient temperature includes:

[0079] S301, determining an ambient temperature correction coefficient based on historical operating status;

[0080] S302, determining a corrected ambient temperature based on the ambient temperature correction coefficient and the current ambient temperature;

[0081] S303 : Determine a charging current correction coefficient based on a pre-calibrated temperature-current correction coefficient mapping relationship and the corrected ambient temperature.

[0082] Among them, the temperature-current correction coefficient mapping table is obtained after calibration with actual vehicle data, and can be continuously iterated and updated, and optimized and upgraded through OTA.

[0083] OTA technology is a technology that remotely manages the firmware, data, and applications on vehicle components and terminals via mobile communication networks. This technology allows automakers to update vehicle software systems over wireless networks, eliminating the need for users to bring their vehicles to a service center for manual upgrades.

[0084] Because the temperature difference between the high-voltage connection system and the ambient temperature directly affects its heat dissipation efficiency, and therefore, its safety, the present invention corrects the current ambient temperature and determines a charging current correction factor based on the corrected ambient temperature. This correction factor ensures that the temperature of the high-voltage connection system does not exceed the temperature safety threshold, thereby ensuring safety during high-current charging.

[0085] As the vehicle goes through different resting times, the temperature of the high voltage connection system changes to a certain extent. Therefore, in order to further improve the accuracy of the ambient temperature correction coefficient, in some embodiments of the present invention, the historical operating status includes the historical operating conditions and the resting time before charging. Figure 4 As shown, step S301 includes:

[0086] S401: Obtain a rest time threshold, and determine at least one limit rest time based on historical operating conditions; the limit rest time is less than the rest time threshold;

[0087] S402: determining a plurality of rest time intervals based on the limit rest time and the rest time threshold, and determining a plurality of preset ambient temperature correction coefficients corresponding to the plurality of rest time intervals under historical operating conditions;

[0088] S403 : Determine a target interval of the rest time before charging based on the multiple rest time intervals, and determine an ambient temperature correction coefficient from among the multiple preset ambient temperature correction coefficients based on the target interval.

[0089] The embodiment of the present invention can determine a more suitable preset ambient temperature correction coefficient for different historical operations by determining different extreme standstill times under different historical operating conditions. In addition, the preset ambient temperature correction coefficient is set to different values ​​corresponding to multiple standstill time intervals, and the ambient temperature correction coefficient is fine-grainedly divided based on the standstill time interval and the historical operating conditions, thereby improving the accuracy of the determined ambient temperature correction coefficient and thus improving the accuracy of the high-current charging control method.

[0090] In a specific embodiment of the present invention, the historical operating conditions include urban low-speed operating conditions, suburban operating conditions, and high-speed operating conditions.

[0091] In a specific embodiment of the present invention, based on the above three historical operating conditions, the extreme rest time includes a first extreme rest time, a second extreme rest time, and a third extreme rest time corresponding to the urban low-speed operating condition, the suburban operating condition, and the high-speed operating condition, respectively. The first extreme rest time is greater than the second extreme rest time, and the second extreme rest time is greater than the third extreme rest time. Then, step S301 is specifically as follows:

[0092] When the historical operating condition is the urban low-speed operating condition and the rest time before charging is less than or equal to the first limit rest time, the ambient temperature correction coefficient is the urban low-speed first correction coefficient. When the rest time before charging is greater than the first limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the urban low-speed second correction coefficient.

[0093] When the historical operating condition is the suburban operating condition and the rest time before charging is less than or equal to the second limit rest time, the ambient temperature correction coefficient is the first correction coefficient for suburban low speed. When the rest time before charging is greater than the second limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the second correction coefficient for suburban.

[0094] When the historical operating condition is a high-speed operating condition and the rest time before charging is less than or equal to the third limit rest time, the ambient temperature correction coefficient is the high-speed first correction coefficient. When the rest time before charging is greater than the third limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the high-speed second correction coefficient.

[0095] In a specific embodiment of the present invention, the corrected ambient temperature in step S302 is:

[0096] T rep =T×(1+K)

[0097] Where, T rep To correct for ambient temperature; T is the current ambient temperature; K is the ambient temperature correction factor.

[0098] In order to better implement the high current charging control method in the embodiment of the present invention, based on the high current charging control method, the embodiment of the present invention also provides a high current charging control device. The vehicle includes a transmission controller and a vehicle controller, such as Figure 5 As shown, the high current charging control device 500 includes:

[0099] The parameter acquisition unit 501 is used to obtain the vehicle's historical operating status, current battery power, and current ambient temperature when the vehicle is in a charging state;

[0100] The charging current correction determination unit 502 is used to obtain a preset charging time and determine whether to perform charging current correction based on the current battery power and the preset charging time;

[0101] a charging current correction coefficient determining unit 503, configured to determine the charging current correction coefficient based on the historical operating status and the current ambient temperature when determining to perform charging current correction;

[0102] a charging unit 504 configured to correct a preset charging current based on a charging current correction coefficient to obtain a corrected charging current, and charge the vehicle based on the corrected charging current;

[0103] The temperature of the high-voltage connection system during charging of the vehicle based on the corrected charging current is less than a safety temperature threshold.

[0104] It should be noted that the high-current charging control device 500 provided in the above embodiment can implement the technical solution described in the above embodiment of the high-current charging control method. The specific implementation principles or specific implementation details of the above modules or units can be found in the corresponding contents in the above embodiment of the high-current charging control method, and will not be described one by one here.

[0105] like Figure 6 As shown, the present invention also provides a vehicle 600. The vehicle 600 includes a processor 601, a memory 602 and a display 603. Figure 6 Only some of the components of vehicle 600 are shown, but it should be understood that implementation of all of the shown components is not a requirement, and greater or fewer components may alternatively be implemented.

[0106] In some embodiments, the processor 601 may be a central processing unit (CPU), a microprocessor, or other data processing chip, configured to execute program codes or process data stored in the memory 602 , such as the high current charging control method of the present invention.

[0107] In some embodiments of the present invention, processor 601 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, processor 601 may be local or remote. In some embodiments, processor 601 may be implemented on a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, multiple clouds, or any combination thereof.

[0108] In some embodiments, the memory 602 may be an internal storage unit of the vehicle 600 , such as a hard drive or memory of the vehicle 600 .

[0109] Furthermore, the memory 602 may include both an internal storage unit of the vehicle 600 and an external storage device. The memory 602 is used to store application software installed in the vehicle 600 and various data.

[0110] In some embodiments, display 603 can be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 603 is used to display information about vehicle 600 and to present a visual user interface. Components 601-603 of vehicle 600 communicate with each other via a system bus.

[0111] In some embodiments of the present invention, when the processor 601 executes the high current charging control program in the memory 602, the following steps may be implemented:

[0112] When the vehicle is in charging state, obtain the vehicle's historical operating status, current battery power and current ambient temperature;

[0113] Obtaining a preset charging time, and determining whether to perform charging current correction based on the current battery level and the preset charging time;

[0114] When it is determined to perform charging current correction, a charging current correction coefficient is determined based on the historical operating status and the current ambient temperature;

[0115] Correcting a preset charging current based on a charging current correction coefficient to obtain a corrected charging current, and charging the vehicle based on the corrected charging current;

[0116] The temperature of the high-voltage connection system during charging of the vehicle based on the corrected charging current is less than a safety temperature threshold.

[0117] It should be understood that, when the processor 601 executes the high-current charging control program in the memory 602 , in addition to the above functions, it can also implement other functions. For details, please refer to the description of the corresponding method embodiment above.

[0118] The vehicle 600 in the embodiment of the present invention may be any one of a fuel vehicle, an electric vehicle or a hybrid vehicle.

[0119] Accordingly, an embodiment of the present invention also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, the steps or functions in the high-current charging control method provided in the above-mentioned method embodiments can be implemented.

[0120] Those skilled in the art will appreciate that all or part of the process flow of the above-described method embodiment can be implemented by instructing related hardware (such as a processor, controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0121] The above is a detailed introduction to a high-current charging control method, device, vehicle and storage medium provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A high current charging control method, characterized in that: include: When the vehicle is in charging state, obtain the vehicle's historical operating status, current battery power and current ambient temperature; Obtaining a preset charging duration, and determining whether to perform charging current correction based on the current battery power and the preset charging duration; When it is determined to perform charging current correction, determining a charging current correction coefficient based on the historical operating status and the current ambient temperature; Correcting a preset charging current based on the charging current correction coefficient to obtain a corrected charging current, and charging the vehicle based on the corrected charging current; wherein a temperature of a high-voltage connection system during charging of the vehicle based on the modified charging current is less than a safety temperature threshold; The historical operating status includes historical operating conditions and a rest time before charging; and determining a charging current correction coefficient based on the historical operating status and the current ambient temperature includes: Obtaining a rest time threshold, and determining at least one limit rest time based on historical operating conditions; the limit rest time is less than the rest time threshold; determining a plurality of rest time intervals based on the limit rest time and the rest time threshold, and determining a plurality of preset ambient temperature correction coefficients corresponding to the plurality of rest time intervals under historical operating conditions; determining a target interval of the pre-charging rest time based on the plurality of rest time intervals, and determining an ambient temperature correction coefficient from among the plurality of preset ambient temperature correction coefficients based on the target interval; determining a corrected ambient temperature based on the ambient temperature correction coefficient and the current ambient temperature; The charging current correction coefficient is determined based on a pre-calibrated temperature-current correction coefficient mapping relationship and the corrected ambient temperature.

2. The high current charging control method according to claim 1, characterized in that: The determining whether to perform charging current correction based on the current battery power and the preset charging time includes: Determining whether the current battery power is greater than or equal to a threshold power level; When the current battery power is greater than or equal to the threshold power, no charging current correction is performed; When the current battery power is less than a threshold power, determining whether the preset charging time is greater than a threshold charging time; When the preset charging time is greater than the threshold charging time, the charging current is corrected; when the preset charging time is less than or equal to the threshold charging time, the charging current is not corrected.

3. The high current charging control method according to claim 1, characterized in that: The historical operating conditions include low-speed operating conditions in urban areas, suburban operating conditions, and high-speed operating conditions.

4. The high current charging control method according to claim 3, characterized in that: The extreme rest time includes a first extreme rest time, a second extreme rest time, and a third extreme rest time corresponding to an urban low-speed operating condition, a suburban operating condition, and a high-speed operating condition, respectively, the first extreme rest time being greater than the second extreme rest time, and the second extreme rest time being greater than the third extreme rest time; determining the ambient temperature correction coefficient based on the historical operating state includes: When the historical operating condition is an urban low-speed operating condition and the pre-charging rest time is less than or equal to the first limit rest time, the ambient temperature correction coefficient is the first urban low-speed correction coefficient; when the pre-charging rest time is greater than the first limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the second urban low-speed correction coefficient; When the historical operating condition is a suburban operating condition and the pre-charging rest time is less than or equal to the second limit rest time, the ambient temperature correction coefficient is the first suburban low-speed correction coefficient; when the pre-charging rest time is greater than the second limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the second suburban correction coefficient; When the historical operating condition is a high-speed operating condition and the pre-charging rest time is less than or equal to the third limit rest time, the ambient temperature correction coefficient is the high-speed first correction coefficient; when the pre-charging rest time is greater than the third limit rest time and less than or equal to the rest time threshold, the ambient temperature correction coefficient is the high-speed second correction coefficient.

5. The high current charging control method according to claim 1, characterized in that: The corrected ambient temperature is: T rep =T×(1+K) Where, T rep To correct for ambient temperature; T is the current ambient temperature; K is the ambient temperature correction factor.

6. A high current charging control device, characterized in that: The high-current charging control method according to any one of claims 1 to 5, wherein the device comprises: A parameter acquisition unit, used to obtain the vehicle's historical operating status, current battery power, and current ambient temperature when the vehicle is in a charging state; a charging current correction judgment unit, configured to obtain a preset charging duration and determine whether to perform charging current correction based on the current battery power and the preset charging duration; a charging current correction coefficient determining unit, configured to determine the charging current correction coefficient based on the historical operating state and the current ambient temperature when determining to perform charging current correction; a charging unit, configured to correct a preset charging current based on the charging current correction coefficient to obtain a corrected charging current, and charge the vehicle based on the corrected charging current; Wherein, a temperature of a high-voltage connection system during charging of the vehicle based on the corrected charging current is less than a safety temperature threshold.

7. A vehicle, characterized in that: comprising a memory and a processor, wherein, The memory is used to store programs; The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps of the high-current charging control method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the high-current charging control method described in any one of claims 1 to 5 are implemented.

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