A vehicle global voltage charging control method and device and vehicle

Abstract

To address the issue of slow charging or even charging failure during boost charging in existing fast charging solutions due to abnormal output from charging piles, a method, device, medium, equipment, and vehicle for full-domain voltage charging control are provided. The method includes: if the charging pile output is abnormal or the voltage platform type of the charging pile is incorrectly identified, obtaining a preset flag bit; if the flag bit is a first preset value or a second preset value, performing boost charging of the battery before receiving a CML message; for the first preset value, performing boost charging of the battery after receiving a CML message; for the second preset value, after receiving a CML message, if the maximum output voltage of the charging pile is less than the lower limit voltage of the battery, performing boost charging of the battery; if the maximum output voltage of the charging pile is between the lower and upper limit voltages of the battery, performing fast charging of the battery pack; and finally, performing boost charging of the battery again when the real-time voltage of the battery, the output voltage of the charging pile, and the output current meet their respective set requirements.

Description

Technical Field

[0001] This application relates to the field of fast charging control for vehicles, specifically a method, device, and vehicle for full-range voltage charging control. Background Technology

[0002] In existing boost charging technology, during the boost charging process, if the motor controller (Integrated Power Unit, IPU) rapidly adjusts the switching frequency and duty cycle, the output voltage of the boost control module will change rapidly. This rapid change may exceed the charging pile's power module's capacity, leading to instability in the charging pile's output voltage and / or output current. If the charging pile cannot compensate for the output voltage changes of the boost control module in time, it will cause the charging port voltage to drop and prevent charging from proceeding with the expected current, or even crash the charging pile and cause charging failure. Summary of the Invention

[0003] This invention provides a vehicle-wide voltage charging control method, device, and vehicle to solve the problem of slow charging or even charging failure caused by abnormal output of the charging pile during the boost charging process in existing fast charging solutions.

[0004] The technical solution of this application is as follows: This application provides a method for controlling the voltage charging of a vehicle across the entire range, including: When an abnormality is detected in the charging pile output or an incorrect voltage platform type is identified, the value of the preset flag bit is obtained; If the value of the preset flag is the first preset value, the battery pack is pre-charged with boost voltage before receiving the CML message sent by the charging pile; and the battery pack is pre-charged with boost voltage after receiving the CML message. If the value of the preset flag is the second preset value, the battery pack is pre-charged with boost voltage before receiving the CML message sent by the charging pile. After receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the first type of voltage platform, and the battery pack is boosted with boost voltage. If the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the second type of voltage platform, and the battery pack is fast-charged first. When the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements, the battery pack is then boosted with boost voltage.

[0005] Preferably, the method further includes: In response to the connection operation between the vehicle and the charging station, the insulation detection voltage of the charging station is obtained; If the insulation detection voltage of the charging pile is less than the upper limit voltage of the battery pack, the battery pack will be pre-charged with boost voltage before receiving the CML message sent by the charging pile. Upon receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the first type of voltage platform, and the battery pack is boosted for charging. If the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the second type of voltage platform. The battery pack is first fast charged, and when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements, the battery pack is then boosted and charged.

[0006] Preferably, the method further includes: If the insulation detection voltage of the charging pile is greater than the upper limit voltage of the battery pack, the voltage platform type matching of the charging pile is identified according to the CML message sent by the charging pile. If the voltage platform type of the charging station is correctly matched, the battery pack will be charged quickly. If the voltage platform type of the charging pile is mismatched, the value of the preset flag bit is set to the second preset flag bit, and a BEM message is sent to the charging pile.

[0007] Preferably, after the step of fast charging the battery pack, and before the step of boost charging the battery pack when the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements, the method further includes: If the output current of the charging pile does not meet the corresponding setting requirements, the value of the preset flag bit is set to the first preset flag bit, and a BEM message is sent to the charging pile.

[0008] Preferably, after the step of fast charging the battery pack, and before the step of boost charging the battery pack when the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements, the method further includes: If the output voltage of the charging pile does not meet the corresponding setting requirements, the value of the preset flag bit is set to the second preset flag bit, and a BEM message is sent to the charging pile.

[0009] Preferably, the steps of first performing fast charging on the battery pack, and then performing boost charging on the battery pack once the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements include: During fast charging, determine whether the output voltage of the charging pile can follow the vehicle's request; If the output voltage of the charging pile follows the vehicle's request, when the real-time voltage of the battery pack is greater than the fourth preset voltage, the charging pile is requested to reduce the output current to a preset safety value. When the output current of the charging pile is less than the preset current value, the battery pack is boosted for charging.

[0010] Preferably, prior to the step of fast charging the battery pack, the method further includes: Send a BCL message containing the battery charging requirement voltage to the charging pile, wherein the battery charging requirement voltage is greater than the maximum output voltage of the charging pile corresponding to the first type of voltage platform; Determine whether the voltage platform of the charging pile is truly a second-class voltage platform based on the charging port voltage; If it is a Class II voltage platform, then perform the step of fast charging the battery pack; If it is not a second type of voltage platform, the voltage platform type of the charging pile is determined to be a first type of voltage platform. Fast charging of the battery pack is stopped, and the value of the preset flag bit is set to the first preset flag bit. A BEM message is sent to the charging pile to directly boost the voltage of the battery pack.

[0011] According to another aspect of this application, this application also provides a vehicle global voltage charging control device, comprising: The preset flag acquisition module is used to acquire the value of the preset flag when an abnormality in the output of the charging pile or an error in the identification of the voltage platform type of the charging pile is detected. The first charging control module is configured to perform boost pre-charging on the battery pack before receiving the CML message sent by the charging pile if the value of the preset flag bit is a first preset value; and to perform boost charging on the charging pile after receiving the CML message. The second charging control module is configured to, if the value of the preset flag bit is a second preset value, perform boost pre-charging on the battery pack before receiving the CML message sent by the charging pile; after receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, determine that the voltage platform type of the charging pile is a first type voltage platform, and perform boost charging on the battery pack; if the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, determine that the voltage platform type of the charging pile is a second type voltage platform, perform fast charging on the battery pack first, and then perform boost charging on the battery pack when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements.

[0012] Preferably, the device further includes: The insulation detection voltage acquisition module is used to acquire the insulation detection voltage of the charging pile in response to the connection operation between the vehicle and the charging pile. The pre-charge module is used to perform boost pre-charge on the battery pack before receiving the CML message sent by the charging pile if the insulation detection voltage of the charging pile is less than the upper limit voltage of the battery pack. The third charging control module is used to determine the voltage platform type of the charging pile as the first type voltage platform and perform boost charging on the battery pack if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack after receiving the CML message. The fourth charging control module is used to determine the voltage platform type of the charging pile as a second-class voltage platform if the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack. The module first performs fast charging on the battery pack, and then performs boost charging on the battery pack when the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements.

[0013] Preferably, the device further includes: The voltage platform type identification module is used to identify whether the voltage platform type matching of the charging pile is incorrect based on the CML message sent by the charging pile if the insulation detection voltage of the charging pile is greater than the upper limit voltage of the battery pack. The fifth charging control module is used to quickly charge the battery pack if the voltage platform type of the charging pile is correctly matched. The preset flag setting module is used to set the value of the preset flag to a second preset flag if the voltage platform type of the charging pile is mismatched, and to send a BEM message to the charging pile.

[0014] Preferably, the device further includes: The BCL message sending module is used to send a BCL message containing the battery charging demand voltage to the charging pile, wherein the battery charging demand voltage is greater than the maximum output voltage of the charging pile corresponding to the first type of voltage platform. The charging port voltage judgment module is used to determine whether the voltage platform of the charging pile is truly a second-type voltage platform based on the charging port voltage. The sixth charging control module is used to perform the step of fast charging the battery pack if the voltage platform is of type II. The seventh charging control module is used to determine that the voltage platform type of the charging pile is the first type if it is not the second type voltage platform, to stop fast charging of the battery pack, and to set the value of the preset flag bit to the first preset flag bit, and send a BEM message to the charging pile to directly boost charge the battery pack.

[0015] This application also provides a vehicle including the aforementioned vehicle-wide voltage charging control device.

[0016] This application also provides a storage medium storing a computer program that, when run on a computer, causes the computer to execute the vehicle global voltage charging control method described above.

[0017] This application also provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the vehicle global voltage charging control method as described above by calling the computer program.

[0018] The beneficial effects of this invention are as follows: Unlike existing technologies that directly stop charging the battery pack when the charging station's output is abnormal, this application proactively performs charging remediation based on a preset flag value when an output abnormality or voltage platform type identification error of the charging station is detected, thereby selecting an appropriate charging method to continue charging the battery pack. Attached Figure Description

[0019] Figure 1 This is an example diagram of the charging control circuit in the embodiments of this application; Figure 2 The flowchart of the vehicle global voltage charging control method in Embodiment 1 of this application is as follows. Figure 1 ; Figure 3 The flowchart of the vehicle global voltage charging control method in Embodiment 1 of this application is as follows. Figure 2 ; Figure 4 This is a flowchart of the vehicle global voltage charging control method in Embodiment 2 of this application; Figure 5 This is a structural block diagram of the vehicle global voltage charging control device in the embodiments of this application; Figure 6 This is a structural block diagram of the vehicle in the embodiments of this application. Detailed Implementation

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings. While the description is quite detailed, it should not be construed as limiting the scope of the present invention. Obvious variations and substitutions of the following examples are all within the scope of protection of this patent.

[0021] Combination Figure 1 For DC charging stations, in existing charging control circuits, when charging the battery directly through the charging station, the vehicle's first switch K1 is closed, while the second switch K2 and the third switch K3 are open. Conversely, when charging the battery through a boost converter, the vehicle's third switch K3 and the second switch K2 are closed, while the first switch K1 is open.

[0022] Based on the above-described charging control circuit, this application provides the following vehicle-wide voltage charging control method, referring to... Figure 2 and Figure 3 The method includes: S101, in response to the connection operation between the vehicle and the charging station, acquires the insulation detection voltage of the charging station.

[0023] Ideally, the insulation detection voltage is the smaller voltage obtained by comparing the maximum permissible total charging voltage recorded in the BHM (Battery Handshake Message) sent by the charging pile with the actual maximum output voltage of the charging pile. For example, if the maximum permissible total charging voltage of the battery pack is 500V and the actual maximum output voltage of the charging pile is 800V, then the insulation detection voltage is 500V. Similarly, if the maximum permissible total charging voltage of the battery pack is 1000V and the actual maximum output voltage of the charging pile is 800V, then the insulation detection voltage is 800V. S102, the insulation detection voltage is compared with a first predetermined voltage TBD1 to determine the voltage platform type of the charging pile.

[0024] The vehicle obtains the charging pile insulation detection voltage via a sampling switch. In this embodiment, the vehicle closes the sampling switch before sending the BHM message to prevent charging failure caused by the charging pile detecting a surge voltage higher than the charging pile's safety threshold. Furthermore, the obtained insulation detection voltage must remain above a certain value for a certain period. This value is the voltage threshold that distinguishes between the second-class voltage platform and the first and third-class voltage platforms, avoiding misjudgment of the charging pile's capability due to an abnormally large instantaneous voltage value when the charging pile outputs the insulation detection voltage.

[0025] Specifically, if the vehicle does not close the sampling switch before sending the BHM message to the charging station, the charging station may mistakenly interpret this as a sudden connection from the vehicle (i.e., detecting a change in the vehicle's motion detection switch), resulting in a momentary high-voltage surge. If this surge voltage exceeds the charging station's safety threshold, the charging station will immediately shut down for protection, causing charging failure. Closing the sampling switch in advance, allowing the vehicle's circuitry to stabilize in the detection state beforehand, can prevent misjudgments caused by sudden actions.

[0026] The first predetermined voltage TBD1 can be the upper limit voltage for the use of the battery pack.

[0027] If the insulation test voltage is greater than the upper limit voltage of the battery pack, the voltage platform type of the charging pile will be determined as the third type of voltage platform, and the process will proceed to S103; otherwise, the voltage platform type of the charging pile will be initially determined as the second type of voltage platform, and the process will proceed to step S108.

[0028] The situation where the insulation detection voltage is greater than the upper limit voltage of the battery pack may be because the insulation detection voltage output by the charging pile is not output according to the logic in step S101.

[0029] S103: Read the maximum output voltage of the charging pile and compare it with the real-time voltage of the battery pack. If the maximum output voltage of the charging pile is greater than the sum of the real-time voltage of the battery pack and the second preset voltage TBD2, proceed to step S104; otherwise, proceed to step S107.

[0030] The maximum output voltage of the charging pile is read from the CML message sent by the charging pile.

[0031] S104, Select the fast charging strategy for the battery pack.

[0032] The second preset voltage TBD2 is a relatively small voltage value, which serves as a sampling error compensation value.

[0033] Combination Figure 1 When the fast charging strategy is selected, the first switch K1 is closed first to enable the vehicle to be powered on at high voltage.

[0034] S105, send a BCL message (battery charging demand message) containing the battery charging demand voltage to the charging pile. The battery charging demand voltage is greater than the maximum output voltage of the charging pile corresponding to the first type of voltage platform.

[0035] The purpose of setting the battery charging voltage requirement higher than the maximum output voltage of the charging pile corresponding to the first type of voltage platform is to test whether the voltage platform of the charging pile is indeed the second type of voltage platform.

[0036] S106, Determine whether the voltage platform of the charging pile is truly a second-class voltage platform based on the charging port voltage.

[0037] If it is a second-class voltage platform, proceed to S107; if it is not a second-class voltage platform, proceed to S110.

[0038] S107. Determine whether the output voltage of the charging pile can normally follow the vehicle's request. If yes, proceed to step S108; otherwise, proceed to step S109.

[0039] In step S107, the output voltage of the charging pile is determined based on the charging port voltage collected by the vehicle.

[0040] S108, activate power transfer until charging is complete.

[0041] Therefore, based on steps S101-S108, when the voltage platform of the battery pack is lower than the maximum output voltage of the charging pile, the battery pack can be quickly charged using a fast charging method.

[0042] S109, set the preset flag position to the second preset flag position, and send a BEM message to the charging pile.

[0043] S110, determine that the voltage platform type of the charging pile is the first type of voltage platform, exit the fast charging of the battery pack, set the value of the preset flag bit to the first preset flag bit, and send a BEM message to the charging pile to directly boost the voltage of the battery pack.

[0044] As can be seen from the aforementioned judgment in S102, the prerequisite for entering step S103 is that the insulation detection voltage is greater than the upper limit voltage of the battery pack. However, in S103, it is determined that the maximum output voltage of the charging pile is less than or equal to the sum of the real-time voltage of the battery pack and the second preset voltage TBD2, which contradicts the condition for entering S103. This may be because the insulation detection voltage obtained in step S101 is an incorrect output, which will lead to an error in the result of determining the voltage platform type of the charging pile as the third type voltage platform in step S102. Continuing to charge the battery pack according to the fast charging strategy will result in charging failure. It is necessary to record this abnormal state. Therefore, the value of the preset flag bit is set to the second preset flag bit, and a BEM message is sent to the charging pile to trigger the charging pile to re-enter the charging process, so as to avoid charging failure caused by the incorrect voltage platform type matching of the charging pile.

[0045] Furthermore, in step S107, since the output voltage of the charging pile cannot follow the charging request from the vehicle, the charging port voltage will drop, the charging will not proceed according to the expected current, and the charging pile may even fail. Therefore, this abnormal situation also needs to be recorded. Thus, the value of the preset flag bit is set to the second preset flag bit, and a BEM message is sent to the charging pile to trigger the charging pile to re-enter the charging process, so as to avoid charging failure caused by the output voltage of the charging pile not following the charging request from the vehicle.

[0046] S111 performs boost pre-charging of the battery pack.

[0047] Among them, combined Figure 1 The process of boosting and pre-charging the battery pack includes: closing the second switch K2 and the third switch K3, and requesting the electric drive boost module to adjust the voltage at the charging port.

[0048] S112, determine whether the maximum output voltage of the charging pile is less than the third preset voltage TBD3.

[0049] The maximum output voltage of the charging pile comes from the CML message of the charging pile.

[0050] The third preset voltage can be the lower limit voltage for the battery pack.

[0051] S113, if the maximum output voltage of the charging pile is less than the third preset voltage TBD3, determine the voltage platform type of the charging pile as the first voltage platform type, and perform boost charging on the battery pack.

[0052] S114, If the maximum output voltage of the charging pile is greater than or equal to the third preset voltage TBD3, select the fast charging strategy for the battery pack.

[0053] S115, send a BCL message (battery charging demand message) containing the battery charging demand voltage to the charging pile. The battery charging demand voltage is greater than the maximum output voltage of the charging pile corresponding to the first type of voltage platform.

[0054] The purpose of setting the battery charging voltage requirement higher than the maximum output voltage of the charging pile corresponding to the first type of voltage platform is to test whether the voltage platform of the charging pile is indeed the second type of voltage platform.

[0055] S116, Determine whether the voltage platform of the charging pile is truly a second-class voltage platform based on the charging port voltage.

[0056] If it is a second-class voltage platform, proceed to S117; if it is not a second-class voltage platform, proceed to S123.

[0057] S117: Determine if the output voltage of the charging pile can normally follow the vehicle's request. If not, proceed to S123; if yes, proceed to S118.

[0058] In step S117, the output voltage of the charging pile is determined based on the charging port voltage collected by the vehicle.

[0059] S118, if the output voltage of the charging pile can follow the vehicle's request normally, then determine whether the real-time voltage of the battery pack is greater than the fourth preset voltage TBD4.

[0060] Among them, the fourth preset voltage TBD4 is a threshold indicating that the vehicle has a relatively high remaining battery power.

[0061] S119, if the real-time voltage of the battery pack is greater than the fourth preset voltage TBD4, request the charging pile to reduce the output current to the preset safety value.

[0062] If the real-time voltage of the battery pack is greater than the fourth preset voltage TBD4, it indicates that the charging capacity is already high, and the vehicle will actively request to reduce the charging current.

[0063] S120, determine whether the output current of the charging pile is less than the preset current value; if yes, proceed to S121; if no, proceed to S122.

[0064] The preset current value is a safe current that will not cause lithium plating in the vehicle.

[0065] S121 performs boost charging on the battery pack.

[0066] S122, set the value of the preset flag bit to the first preset flag bit, and send a BEM message to the charging pile.

[0067] In a conventional charging process, if the output current of the charging pile fails to drop to the set safe current in step S120, charging will fail. However, in this embodiment, by setting the value of the preset flag bit to the first preset flag bit and sending a BEM message to the charging pile, the charging pile can be triggered to re-enter the charging process for charging recovery.

[0068] S123, determine that the voltage platform type of the charging pile is the first type of voltage platform, exit the fast charging of the battery pack, set the value of the preset flag bit to the first preset flag bit, and send a BEM message to the charging pile to directly boost the voltage of the battery pack.

[0069] In this embodiment, a preset flag is used to indicate whether an abnormality occurs in the charging pile output or whether a charging voltage platform type mismatch occurs during the charging process.

[0070] S124, set the value of the preset flag bit to the second preset flag bit, and send a BEM message to the charging pile.

[0071] In step S124, since the output voltage of the charging pile cannot follow the charging request from the vehicle, the charging port voltage will drop and the charging will not proceed according to the expected current, or even cause the charging pile to fail. Therefore, it is necessary to record this abnormal situation. Thus, the value of the preset flag bit is set to the second preset flag bit, and a BEM message is sent to the charging pile to trigger the charging pile to re-enter the charging process, so as to avoid charging failure caused by the output voltage of the charging pile not following the charging request from the vehicle.

[0072] Through the aforementioned steps S101-S124, the vehicle becomes compatible with charging stations on different voltage platforms, meaning that vehicles using this strategy can be charged regardless of the charging station. Furthermore, steps S108-S118, while ensuring successful charging, increase the SOC percentage during fast charging and decrease the SOC percentage during boost charging, significantly improving the vehicle's charging adaptability and shortening charging time. Through steps S114-S121, fast charging is used first in the low SOC range, followed by boost charging as the SOC rises. This avoids incomplete charging due to voltage mismatch and maximizes the charging station's capacity. The combination of fast charging followed by boost charging shortens charging time and reduces user anxiety about recharging; this strategy is particularly effective in reducing charging time for high-rate batteries.

[0073] In addition, in the abnormal situations in steps S107, S117 and S120, a BEM message is sent to the charging pile to trigger the charging pile to re-enter the charging process instead of directly ending the charging. This avoids charging failures caused by the failure to meet the conditions in steps S103, S107 and S116, and achieves charging recovery.

[0074] In this embodiment, if the conditions in steps S103, S107, and S116 are not met, it indicates that an abnormality has occurred in the charging pile output or that the voltage platform type of the charging pile has been incorrectly identified. To avoid charging failure due to these situations, this embodiment further provides a vehicle full-domain voltage charging control method for such scenarios, referring to... Figure 4 The method includes: S201: When an abnormality is detected in the output of the charging pile or an error is detected in the voltage platform type of the charging pile, the value of the preset flag bit is obtained.

[0075] S202, if the value of the preset flag bit is the first preset value, the battery pack is precharged before receiving the CML message sent by the charging pile.

[0076] S203, if the value of the preset flag bit is the second preset value, before receiving the CML message sent by the charging pile, the battery pack is first boosted and precharged.

[0077] S204. After receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, determine that the voltage platform type of the charging pile is a first type voltage platform, and perform boost charging on the battery pack.

[0078] S205, if the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the second type of voltage platform. The battery pack is first fast charged, and when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements, the battery pack is then boosted and charged.

[0079] The detection of abnormal charging pile output or incorrect voltage platform type identification of the charging pile corresponds to the time when the Battery Management System (BMS) sends a BEM message to the charging pile. After receiving the BEM message, the charging pile will re-enter the charging process.

[0080] In this application embodiment, abnormal charging pile output refers to abnormal output voltage or abnormal output current of the charging pile; specifically, it includes one of the following situations: 1) The output voltage of the charging pile remains lower than the requested voltage at the vehicle end for a long time, corresponding to steps S107 and S117; 2) The output voltage of the charging pile can meet the requested voltage of the vehicle, but the output current of the charging pile remains greater than the requested current of the vehicle for a long time, corresponding to step S120.

[0081] In this embodiment of the application, "long time" refers to the set duration; the output current of the charging pile specifically refers to the current in the CCS message, and the output voltage of the charging pile specifically refers to the charging port voltage collected by the vehicle; the requested current and requested voltage of the vehicle refer to the relevant parameters carried in the BCL message sent by the battery management system to the charging pile.

[0082] When the output voltage of the charging pile is lower than the vehicle's requested voltage for an extended period, the vehicle may fail to charge and could even discharge, leading to charging failure. Conversely, if the charging pile's output voltage meets the vehicle's requested voltage but the output current cannot be reduced to a safe preset current value, directly switching the first to third switches K3 from fast charging to boost charging might cause the switches to close under load, damaging their lifespan. Therefore, switching the switches is not possible, resulting in an inability to switch charging states. Thus, in either of these two situations, the charging pile's output is abnormal. To continue charging the battery pack, the Battery Management System (BMS) needs to actively trigger a charging recovery mechanism, i.e., execute steps S202-S205.

[0083] In this embodiment, when the value of the preset flag is the first preset flag, it indicates that the output voltage of the charging pile can meet the requested voltage of the vehicle, but the output current of the charging pile cannot be reduced to a safe value for a long time, and the charging pile may actively terminate charging. Therefore, when such a problem is identified, this embodiment performs active charging remediation through steps S201-S205.

[0084] Combining steps S102-S109 and S114-S121 above, when the value of the preset flag bit is either the first preset flag bit or the second preset flag bit, it indicates that an abnormality has occurred during the charging process. Therefore, before the CML message, it is no longer necessary to match the voltage platform type of the charging pile based on the insulation detection voltage; instead, a boost pre-charge is performed on the battery pack to shorten the charging time as much as possible.

[0085] In this embodiment, the voltage platform type of the charging pile is determined based on the relative magnitude of the maximum output voltage of the charging pile and the lower and upper limits of the battery pack's operating voltage.

[0086] When the maximum output voltage of the charging pile is less than the lower limit voltage of the battery pack, the voltage platform type of the charging pile is defined as the first type of voltage platform; when the maximum output voltage of the charging pile is between the lower limit voltage and the upper limit voltage of the battery pack, the voltage platform type of the charging pile is defined as the second type of voltage platform; when the maximum output voltage of the charging pile is greater than the upper limit voltage of the battery pack, the voltage platform type of the charging pile is defined as the third type of voltage platform.

[0087] A voltage platform type mismatch for a charging pile refers to a mismatch where the relationship between the maximum output voltage of the charging pile and the real-time voltage of the battery pack contradicts the relationship determined based on the relative magnitudes of the maximum output voltage of the charging pile and the lower and upper limits of the battery pack's operating voltage.

[0088] When an abnormality in the charging pile output or an incorrect identification of the charging pile's voltage platform type is detected, charging remediation is performed to avoid directly entering a charging failure state. When the preset flag value is the first preset flag or the second preset flag, boost pre-charging of the battery pack is performed before receiving the CML message sent by the charging pile, without needing to determine the voltage platform type based on the insulation detection voltage, thus shortening the charging time. After receiving the CML message, a reasonable judgment is made based on the charging pile's maximum output voltage and the battery pack's real-time voltage, and a more suitable charging method is selected to shorten the charging time as much as possible.

[0089] Reference Figure 5 This application also provides a charging control device, including: The preset flag acquisition module 101 is used to acquire the value of the preset flag when the charging pile output is found to be abnormal or the voltage platform type of the charging pile is incorrectly identified. The first charging control module 102 is configured to perform boost pre-charging on the battery pack before receiving the CML message sent by the charging pile if the value of the preset flag bit is a first preset value; and to perform boost charging on the charging pile after receiving the CML message. The second charging control module 103 is configured to, if the value of the preset flag bit is a second preset value, perform boost pre-charging on the battery pack before receiving the CML message sent by the charging pile; after receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, determine that the voltage platform type of the charging pile is a first type of voltage platform, and perform boost charging on the battery pack; if the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, determine that the voltage platform type of the charging pile is a second type of voltage platform, perform fast charging on the battery pack first, and then perform boost charging on the battery pack when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements.

[0090] Preferably, the device further includes: The insulation detection voltage acquisition module 104 is used to acquire the insulation detection voltage of the charging pile in response to the connection operation between the vehicle and the charging pile. The pre-charge module 105 is used to perform boost pre-charge on the battery pack before receiving the CML message sent by the charging pile if the insulation detection voltage of the charging pile is less than the upper limit voltage of the battery pack. The third charging control module 106 is used to determine the voltage platform type of the charging pile as a first type voltage platform and perform boost charging on the battery pack if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack after receiving the CML message. The fourth charging control module 107 is used to determine that the voltage platform type of the charging pile is a second type voltage platform if the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack. The module first performs fast charging on the battery pack, and then performs boost charging on the battery pack when the real-time voltage of the battery pack, the output voltage of the charging pile and the output current meet their respective set requirements.

[0091] Preferably, the device further includes: The voltage platform type identification module 108 is used to identify whether the voltage platform type matching of the charging pile is incorrect based on the CML message sent by the charging pile if the insulation detection voltage of the charging pile is greater than the upper limit voltage of the battery pack. The fifth charging control module 109 is used to quickly charge the battery pack if the voltage platform type of the charging pile is correctly matched. The preset flag setting module 110 is used to set the value of the preset flag to a second preset flag if the voltage platform type of the charging pile is mismatched.

[0092] The device further includes: The BCL message sending module is used to send a BCL message containing the battery charging demand voltage to the charging pile, wherein the battery charging demand voltage is greater than the maximum output voltage of the charging pile corresponding to the first type of voltage platform. The charging port voltage judgment module is used to determine whether the voltage platform of the charging pile is truly a second-type voltage platform based on the charging port voltage. The sixth charging control module is used to perform the step of fast charging the battery pack if the voltage platform is of type II. The seventh charging control module is used to determine that the voltage platform type of the charging pile is the first type if it is not the second type voltage platform, to stop fast charging of the battery pack, and to set the value of the preset flag bit to the first preset flag bit, and send a BEM message to the charging pile to directly boost charge the battery pack.

[0093] The charging control device in this embodiment corresponds to the vehicle full-range voltage charging control method in the above embodiments, and can achieve the same technical effect as the above method. That is, when an abnormality in the output of the charging pile is detected, it actively performs charging compensation according to the value of a preset flag bit, and selects an appropriate charging method to continue charging the battery pack.

[0094] This application embodiment also provides a storage medium storing a computer program that, when run on a computer, causes the computer to execute the vehicle global voltage charging control method described above.

[0095] This application also provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the vehicle global voltage charging control method as described above by calling the computer program.

[0096] This application also provides a vehicle including the above-described charging control device.

[0097] Figure 6 This is a block diagram illustrating a vehicle 200 according to an exemplary embodiment. For example, vehicle 200 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicle. Vehicle 200 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0098] Reference Figure 6The vehicle 200 may include various subsystems, such as an infotainment system 210, a perception system 220, a decision control system 230, a drive system 240, and a computing platform 250. The vehicle 200 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and component of the vehicle 200 can be interconnected via wired or wireless means. In some embodiments, the infotainment system 210 may include a communication system, an entertainment system, and a navigation system, etc.

[0099] The perception system 220 may include several types of sensors for sensing information about the environment surrounding the vehicle 200. For example, the perception system 220 may include a global positioning system (which may be a GPS system, a BeiDou system, or another positioning system), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0100] The decision control system 230 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system. The drive system 240 may include components that provide power to the vehicle 200. In one embodiment, the drive system 240 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0101] Some or all of the functions of vehicle 200 are controlled by computing platform 250. Computing platform 250 may include at least one processor 251 and memory 252, and processor 251 may execute instructions 253 stored in memory 252.

[0102] Processor 251 can be any conventional processor, such as a commercially available CPU. The processor may also include, for example, a Graphics Processing Unit (GPU), a Field Programmable Gate Array (FPGA), a System on Chip (SOC), an Application Specific Integrated Circuit (ASIC), or a combination thereof.

[0103] The memory 252 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.

[0104] In addition to instruction 253, memory 252 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 252 can be used by computing platform 250.

[0105] In this embodiment of the disclosure, processor 251 may execute instruction 253 to complete all or part of the steps of the control method described above.

[0106] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0107] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding the specification and drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0108] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0109] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0110] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0111] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0112] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0113] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processing module, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (control method), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic device, and portable optical disc read-only memory (CDROM). In addition, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning paper or other media, followed by editing, interpreting or otherwise processing as necessary, and then stored in computer memory.

[0114] It should be understood that various parts of the embodiments of this disclosure can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0115] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0116] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into a single processing module, or each unit can exist physically separately, or two or more units can be integrated into a single module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The aforementioned storage medium can be a read-only memory, a hard disk, or an optical disk, etc.

[0117] Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for controlling the voltage charging of a vehicle across its entire range, characterized in that, include: When an abnormality is detected in the charging pile output or an incorrect voltage platform type is identified, the value of the preset flag bit is obtained; If the value of the preset flag is the first preset value, the battery pack is pre-charged with boost voltage before receiving the CML message sent by the charging pile; and the battery pack is pre-charged with boost voltage after receiving the CML message. If the value of the preset flag is the second preset value, the battery pack is pre-charged with boost voltage before receiving the CML message sent by the charging pile. After receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the first type of voltage platform, and the battery pack is boosted with boost voltage. If the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the second type of voltage platform, and the battery pack is fast-charged first. When the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements, the battery pack is then boosted with boost voltage.

2. The vehicle full-range voltage charging control method according to claim 1, characterized in that, The method further includes: In response to the connection operation between the vehicle and the charging station, the insulation detection voltage of the charging station is obtained; If the insulation detection voltage of the charging pile is less than the upper limit voltage of the battery pack, the battery pack will be pre-charged with boost voltage before receiving the CML message sent by the charging pile. Upon receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the first type of voltage platform, and the battery pack is boosted for charging. If the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, the voltage platform type of the charging pile is determined to be the second type of voltage platform. The battery pack is first fast charged, and when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements, the battery pack is then boosted and charged.

3. The vehicle full-range voltage charging control method according to claim 2, characterized in that, The method further includes: If the insulation detection voltage of the charging pile is greater than the upper limit voltage of the battery pack, the voltage platform type matching of the charging pile is identified according to the CML message sent by the charging pile. If the voltage platform type of the charging station is correctly matched, the battery pack will be charged quickly. If the voltage platform type of the charging pile is mismatched, the value of the preset flag bit is set to the second preset flag bit, and a BEM message is sent to the charging pile.

4. The vehicle global voltage charging control method according to claim 2, characterized in that, After the step of fast charging the battery pack, and before the step of boost charging the battery pack when the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements, the method further includes: If the output current of the charging pile does not meet the corresponding setting requirements, the value of the preset flag bit is set to the first preset flag bit, and a BEM message is sent to the charging pile.

5. The vehicle full-range voltage charging control method according to claim 2, characterized in that, After the step of fast charging the battery pack, and before the step of boost charging the battery pack when the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements, the method further includes: If the output voltage of the charging pile does not meet the corresponding setting requirements, the value of the preset flag bit is set to the second preset flag bit, and a BEM message is sent to the charging pile.

6. The vehicle full-range voltage charging control method according to claim 1 or 2, characterized in that, The process of first fast charging the battery pack, and then boost charging the battery pack once the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements includes: During fast charging, determine whether the output voltage of the charging pile can follow the vehicle's request; If the output voltage of the charging pile follows the vehicle's request, when the real-time voltage of the battery pack is greater than the fourth preset voltage, the charging pile is requested to reduce the output current to a preset safety value. When the output current of the charging pile is less than the preset current value, the battery pack is boosted for charging.

7. The vehicle full-range voltage charging control method according to any one of claims 1-6, characterized in that, Prior to the step of fast charging the battery pack, the method further includes: Send a BCL message containing the battery charging requirement voltage to the charging pile, wherein the battery charging requirement voltage is greater than the maximum output voltage of the charging pile corresponding to the first type of voltage platform; Determine whether the voltage platform of the charging pile is truly a second-class voltage platform based on the charging port voltage; If it is a Class II voltage platform, then perform the step of fast charging the battery pack; If it is not a second type of voltage platform, the voltage platform type of the charging pile is determined to be a first type of voltage platform. Fast charging of the battery pack is stopped, and the value of the preset flag bit is set to the first preset flag bit. A BEM message is sent to the charging pile to directly boost the voltage of the battery pack.

8. A vehicle global voltage charging control device, characterized in that, include: The preset flag acquisition module is used to acquire the value of the preset flag when an abnormality in the output of the charging pile or an error in the identification of the voltage platform type of the charging pile is detected. The first charging control module is configured to perform boost pre-charging on the battery pack before receiving the CML message sent by the charging pile if the value of the preset flag bit is a first preset value; and to perform boost charging on the charging pile after receiving the CML message. The second charging control module is configured to, if the value of the preset flag bit is a second preset value, perform boost pre-charging on the battery pack before receiving the CML message sent by the charging pile; after receiving the CML message, if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack, determine that the voltage platform type of the charging pile is a first type voltage platform, and perform boost charging on the battery pack; if the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack, determine that the voltage platform type of the charging pile is a second type voltage platform, perform fast charging on the battery pack first, and then perform boost charging on the battery pack when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements.

9. The vehicle global voltage charging control device according to claim 8, characterized in that, The device further includes: The insulation detection voltage acquisition module is used to acquire the insulation detection voltage of the charging pile in response to the connection operation between the vehicle and the charging pile. The pre-charge module is used to perform boost pre-charge on the battery pack before receiving the CML message sent by the charging pile if the insulation detection voltage of the charging pile is less than the upper limit voltage of the battery pack. The third charging control module is used to determine the voltage platform type of the charging pile as the first type voltage platform and perform boost charging on the battery pack if the maximum output voltage of the charging pile carried in the CML message is less than the lower limit voltage of the battery pack after receiving the CML message. The fourth charging control module is used to determine the voltage platform type of the charging pile as a second-class voltage platform if the maximum output voltage of the charging pile carried in the CML message is between the lower limit voltage and the upper limit voltage of the battery pack. The module first performs fast charging on the battery pack, and then performs boost charging on the battery pack when the real-time voltage of the battery pack, the output voltage of the charging pile, and the output current meet their respective set requirements.

10. The vehicle full-range voltage charging control device according to claim 7, characterized in that, The device further includes: The voltage platform type identification module is used to identify whether the voltage platform type matching of the charging pile is incorrect based on the CML message sent by the charging pile if the insulation detection voltage of the charging pile is greater than the upper limit voltage of the battery pack. The fifth charging control module is used to quickly charge the battery pack if the voltage platform type of the charging pile is correctly matched. The preset flag setting module is used to set the value of the preset flag to a second preset flag if the voltage platform type of the charging pile is mismatched, and to send a BEM message to the charging pile.

11. The vehicle global voltage charging control device according to any one of claims 7-10, characterized in that, The device further includes: The BCL message sending module is used to send a BCL message containing the battery charging demand voltage to the charging pile, wherein the battery charging demand voltage is greater than the maximum output voltage of the charging pile corresponding to the first type of voltage platform. The charging port voltage judgment module is used to determine whether the voltage platform of the charging pile is truly a second-type voltage platform based on the charging port voltage. The sixth charging control module is used to perform the step of fast charging the battery pack if the voltage platform is of type II. The seventh charging control module is used to determine that the voltage platform type of the charging pile is the first type if it is not the second type voltage platform, to stop fast charging of the battery pack, and to set the value of the preset flag bit to the first preset flag bit, and send a BEM message to the charging pile to directly boost charge the battery pack.

12. A vehicle, characterized in that, Includes the vehicle global voltage charging control device as described in any one of claims 8-11.

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