Vehicle global voltage charging control method and device and vehicle

Abstract

The invention provides a vehicle global voltage charging control method and device, a medium, equipment and a vehicle, and aims to solve the problems of slow charging and even charging failure caused by abnormal output of a charging pile in a boost charging process in an existing rapid charging scheme. The method comprises the following steps: if the charging pile outputs abnormally or the voltage platform type of the charging pile is identified wrongly, acquiring a preset flag bit; if the value is the first preset value or the second preset value, boosting and pre-charging the battery before the CML message is received; for the first preset value, after the CML message is received, boosting and charging the battery; for the second preset value, after the CML message is received, if the maximum output voltage of the charging pile is smaller than the use lower limit voltage of the battery, boosting and charging the battery; and if the maximum output voltage of the charging pile is between the use lower limit voltage and the use upper limit voltage of the battery, quickly charging the battery pack, and boosting and charging the battery when the real-time voltage of the battery and the output voltage and the output current of the charging pile meet respective set requirements.

Description

Technical Field

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

[0002] In existing boost charging technology, during the boost charging process, if the motor controller (Integrated Power Unit, IPU) quickly adjusts the switching frequency and duty cycle, the output voltage of the boost control module will change rapidly. This rapid change may exceed the tolerance of the charging pile power module, resulting in unstable output voltage and / or output current of the charging pile. If the charging pile cannot compensate for the output voltage change of the boost control module in time, it will cause the charging port voltage to drop and charging to fail according to the expected current, or even cause the charging pile to fail. Summary of the Invention

[0003] The present invention provides a vehicle full-range voltage charging control method, device and vehicle, which are used to solve the problem of slow charging or even charging failure caused by abnormal output of charging piles during boost charging in existing fast charging solutions.

[0004] The technical solution of this application is: This application provides a vehicle global voltage charging control method, including: When an abnormal output of the charging pile is detected or the voltage platform type of the charging pile is incorrectly identified, the value of the preset flag bit is obtained; If the value of the preset flag bit is a first preset value, before receiving the CML message sent by the charging pile, the battery pack is boosted and pre-charged; after receiving the CML message, the battery pack is boosted and charged; If the value of the preset flag is a second preset value, before receiving the CML message sent by the charging pile, the battery pack is first boosted and pre-charged; 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 a first type voltage platform, and the battery pack is boosted and charged; 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 a second type voltage platform, the battery pack is first fast-charged, and the battery pack is boosted and charged when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements.

[0005] Preferably, the method further comprises: In response to a connection operation between the vehicle and the charging pile, obtaining an insulation detection voltage of the charging pile; If the insulation detection voltage of the charging pile is lower than the upper limit voltage of the battery pack, the battery pack is pre-charged 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, determining that the voltage platform type of the charging pile is a first type voltage platform, and performing 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, the voltage platform type of the charging pile is determined to be the second type voltage platform. The battery pack is first fast-charged. 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 boosted and charged.

[0006] Preferably, the method further comprises: If the insulation detection voltage of the charging pile is greater than the upper limit voltage of the battery pack, identify whether the voltage platform type matching of the charging pile is incorrect according to the CML message sent by the charging pile; If the voltage platform type of the charging pile matches correctly, the battery pack will be quickly charged; 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, when the real-time voltage of the battery pack, the output voltage and the output current of the charging pile meet their respective set requirements, and before the step of boost charging the battery pack, the method further includes: If the output current of the charging pile does not meet the corresponding set 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, when the real-time voltage of the battery pack, the output voltage and the output current of the charging pile meet their respective set requirements, and before the step of boost charging the battery pack, 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 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 step of boosting and charging the battery pack includes: During fast charging, determine whether the output voltage of the charging pile can meet the vehicle's request; If the output voltage of the charging pile follows the vehicle-side 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 and charged.

[0010] Preferably, before the step of fast charging the battery pack, the method further comprises: Sending a BCL message containing a battery charging requirement voltage to the charging pile, where the battery charging requirement voltage is greater than the maximum output voltage of the charging pile corresponding to the first voltage platform; Determine whether the voltage platform of the charging pile is actually the second type voltage platform based on the voltage of the charging port; If it is the second voltage platform, then the step of fast charging the battery pack is performed; If it is not a second-class voltage platform, determine that the voltage platform type of the charging pile is a first-class voltage platform, exit 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 charging the battery pack.

[0011] According to another aspect of the present application, the present application also provides a vehicle global voltage charging control device, comprising: A preset flag bit acquisition module is used to obtain the value of the preset flag bit when an abnormal output of the charging pile is identified or an error is made in identifying the voltage platform type of the charging pile; A first charging control module is configured to, if the value of the preset flag bit is a first preset value, perform boost pre-charging on the battery pack before receiving a CML message sent by the charging pile; and 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, quickly charge the battery pack first, and then boost charge the battery pack when the real-time voltage of the battery pack, the output voltage and the output current of the charging pile meet their respective set requirements.

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

[0013] Preferably, the device further comprises: a voltage platform type identification module, configured to identify whether the voltage platform type matching of the charging pile is incorrect according to the CML message sent by the charging pile, if the insulation detection voltage of the charging pile is greater than the upper limit voltage in use of the battery pack. a fifth charging control module, configured to perform a fast charging on the battery pack, if the voltage platform type matching of the charging pile is correct. a pre-set flag setting module, configured to set the value of the pre-set flag as a second pre-set flag, and send a BEM message to the charging pile, if the voltage platform type matching of the charging pile is incorrect.

[0014] Preferably, the device further comprises: a BCL message sending module, configured to send a BCL message containing a battery charging demand voltage to the charging pile, the battery charging demand voltage being greater than the maximum output voltage of the charging pile corresponding to the first voltage platform type. a charging port voltage judgment module, configured to determine whether the voltage platform of the charging pile is actually the second voltage platform type according to the charging port voltage. a sixth charging control module, configured to perform a fast charging on the battery pack, if the voltage platform type is the second voltage platform type. a seventh charging control module, configured to determine that the voltage platform type of the charging pile is the first voltage platform type, exit the fast charging on the battery pack, set the value of the pre-set flag as a first pre-set flag, and send a BEM message to the charging pile, if the voltage platform type is not the second voltage platform type, so as to directly perform a boost charging on the battery pack.

[0015] The application also provides a vehicle comprising the vehicle global voltage charging control device.

[0016] The present application also provides a storage medium on which a computer program is stored. When the computer program is run on a computer, the computer is enabled to execute the vehicle global voltage charging control method as described above.

[0017] The present application also provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor calls the computer program to execute the vehicle full-range voltage charging control method as described above.

[0018] The beneficial effects of the present invention are: Unlike the prior art solution that directly stops charging the battery pack when the charging pile output is abnormal, the present application actively performs charging remediation based on the value of a preset flag bit when it identifies an abnormal output of the charging pile or an error in identifying the voltage platform type of the charging pile, thereby selecting an appropriate charging method to continue charging the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an example diagram of a charging control circuit in an embodiment of the present application; Figure 2 The process of the vehicle global voltage charging control method in the embodiment of the present application is as follows: Figure 1 ; Figure 3 The process of the vehicle global voltage charging control method in the embodiment of the present application is as follows: Figure 2 ; Figure 4 This is a flow chart of a vehicle global voltage charging control method in implementation mode 2 of an embodiment of the present application; Figure 5 This is a structural block diagram of a vehicle global voltage charging control device in an embodiment of the present application; Figure 6 This is a structural block diagram of the vehicle in an embodiment of the present application. DETAILED DESCRIPTION

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

[0021] Combine Figure 1 In the existing charging control circuit for a DC charging pile, when charging the battery directly through the charging pile, 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 booster, the vehicle's third switch K3 and second switch K2 are closed, while the first switch K1 is open.

[0022] The embodiment of the application provides a vehicle global voltage charging control method based on the charging control circuit, and the method comprises the steps of Figure 2 And Figure 3 The method comprises the steps of S101, in response to a connection operation of a vehicle and a charging pile, acquiring an insulation detection voltage of the charging pile.

[0023] In an ideal state, the insulation detection voltage is a smaller voltage obtained by comparing a highest allowed total charging voltage recorded in a BHM (Battery Handshake Message) message sent by the charging pile to a battery pack and an actual maximum output voltage of the charging pile. For example, the highest allowed total charging voltage of the battery pack is 500V, and the actual maximum output voltage of the charging pile is 800V, so that the insulation detection voltage is 500V at this time. For another example, the highest allowed total charging voltage of the battery pack is 1000V, and the actual maximum output voltage of the charging pile is 800V, so that the insulation detection voltage is 800V at this time. S102, comparing the insulation detection voltage with a first predetermined voltage TBD1 to determine the voltage platform type of the charging pile.

[0024] The vehicle acquires the insulation detection voltage of the charging pile through a sampling switch; in the embodiment of the application, the vehicle closes the sampling switch in advance before sending the BHM message, so as to prevent the charging pile from failing to charge due to the fact that a surge voltage higher than a safety threshold of the charging pile is generated by the sampling switch of the vehicle. In addition, the acquired insulation detection voltage needs to be greater than a certain value for a certain time, and the value is a voltage threshold for distinguishing the second type of voltage platform from the first type and the third type of voltage platform, so as to avoid misjudging the capacity of the charging pile due to the fact that an abnormal output of a transient high voltage value is generated by the charging pile when the insulation detection voltage is output.

[0025] Specifically, if the vehicle does not close the sampling switch in advance before sending the BHM message to the charging pile, the charging pile may mistakenly think that the vehicle end is suddenly connected (that is, the motion detection switch of the vehicle end is detected to change), so that a transient high voltage surge is generated. If the surge voltage exceeds the safety threshold of the charging pile, the charging pile will directly "strike" to protect, resulting in charging failure. Closing the sampling switch in advance can make the vehicle end circuit stabilize in the detection state in advance, so that misjudgment caused by sudden action can be avoided.

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

[0027] If the insulation detection voltage is greater than the use upper limit voltage of the battery pack, it is determined that the voltage platform type of the charging pile is the third type of voltage platform, and step S103 is entered; otherwise, the voltage platform type of the charging pile is initially determined as the second type of voltage platform, and step S108 is entered.

[0028] Here, 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; if not, proceed to step S107.

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

[0031] S104: Selecting a fast charging strategy for the battery pack.

[0032] The second preset voltage TBD2 is a smaller voltage value and serves as a sampling error compensation value.

[0033] Combine Figure 1 When the fast charging strategy is selected, the first switch K1 is closed first to realize high-voltage power-on of the entire vehicle.

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

[0035] The purpose of the battery charging demand voltage being greater than the maximum output voltage of the charging pile corresponding to the first type voltage platform is to test whether the voltage platform of the charging pile is actually the second type voltage platform.

[0036] S106: Determine whether the voltage platform of the charging pile is actually the second type voltage platform based on the voltage of the charging port.

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

[0038] S107: Determine whether the output voltage of the charging pile can normally follow the request of the vehicle. If yes, proceed to step S108; if not, proceed to step S109.

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

[0040] S108, start energy transmission until charging is completed.

[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 is 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 position to the first preset flag position, send a BEM message to the charging pile to directly perform boost charging on the battery pack.

[0044] According to the judgment of the foregoing S102, the premise of 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 judged 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 is contradictory to the condition of entering S103. This may be because the insulation detection voltage obtained in step S101 is a false output, which will cause the result of determining that the voltage platform type of the charging pile is the third type of voltage platform in step S102 to be incorrect, and continuing to charge the battery pack according to the fast charging strategy will cause charging failure, so the value of the preset flag position is set to the second preset flag position, and a BEM message is sent to the charging pile to trigger the charging pile to re-enter the charging process, avoiding charging failure caused by the matching error of the voltage platform type of the charging pile.

[0045] In addition, in step S107, since the output voltage of the charging pile cannot normally follow the charging request of the vehicle end, at this time, it will cause the charging port voltage to drop and cause the charging to be unable to proceed according to the expected current, and even cause the charging pile to be dragged down to cause charging failure; therefore, this abnormal situation also needs to be recorded, so the value of the preset flag position is also set to the second preset flag position, and a BEM message is sent to the charging pile to trigger the charging pile to re-enter the charging process, avoiding charging failure caused by the output voltage of the charging pile being unable to normally follow the charging request of the vehicle end.

[0046] S111, perform boost pre-charging on the battery pack.

[0047] Among them, in combination with Figure 1 The process of boost pre-charging on 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 of 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 of the battery pack.

[0051] S113: If the maximum output voltage of the charging pile is less than the third preset voltage TBD3, it is determined that the voltage platform type of the charging pile is the first voltage platform type, and the battery pack is boosted and charged.

[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 , sending a BCL message (battery charging requirement message) containing a battery charging requirement voltage to the charging pile, where the battery charging requirement voltage is greater than the maximum output voltage of the charging pile corresponding to the first type voltage platform.

[0054] The purpose of the battery charging demand voltage being greater than the maximum output voltage of the charging pile corresponding to the first type voltage platform is to test whether the voltage platform of the charging pile is actually the second type voltage platform.

[0055] S116: Determine whether the voltage platform of the charging pile is actually the second type voltage platform based on the charging port voltage.

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

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

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

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

[0060] The fourth preset voltage TBD4 is a threshold indicating that the remaining power of the vehicle is relatively high.

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

[0062] When the real-time voltage of the battery pack is greater than the fourth preset voltage TBD4, it indicates that the charging power is already large, and the vehicle side 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 so, enter S121; if not, enter S122.

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

[0065] S121, boost charging the battery pack.

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

[0067] In a conventional charging process, when the output current of the charging pile in step S120 cannot be reduced to the set safety current, a charging failure situation occurs. In the embodiment of the present application, by setting the value of the preset flag bit as the first preset flag bit and sending a BEM message to the charging pile, the charging pile end can be triggered to re-enter the charging process and perform charging remediation.

[0068] S123, determining that the voltage platform type of the charging pile is the first type of voltage platform, exiting the fast charging of the battery pack, setting the value of the preset flag bit as the first preset flag bit, and sending a BEM message to the charging pile to directly boost charge the battery pack.

[0069] In the embodiment of the present application, the preset flag bit is used to indicate whether a charging pile output abnormality occurs or whether a charging voltage platform type matching error occurs during charging.

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

[0071] In step S124, since the output voltage of the charging pile cannot normally follow the charging request of the vehicle end, at this time, the charging port voltage will drop and the charging will not be able to proceed according to the expected current, and even the charging pile will be dragged down to cause a charging failure situation. Therefore, this abnormal situation also needs to be recorded, so 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 the charging failure caused by the output voltage of the charging pile cannot normally follow the charging request of the vehicle end.

[0072] Through the aforementioned steps S101-S124, the vehicle can be compatible with charging piles of different voltage platforms for charging, that is, vehicles that apply this strategy can be charged without selecting a pile. In addition, relying on steps S108-S118, the SOC interval ratio of fast charging is increased while the SOC ratio of boost charging is reduced under the premise of ensuring successful charging, which greatly improves the charging adaptability of the vehicle and shortens the charging time. Through steps S114-S121, fast charging is first used in the low SOC interval, and boost charging is used after the SOC rises. This can avoid the situation where the charging pile is not fully charged due to voltage mismatch and also greatly exert the capacity of the charging pile. By combining fast charging first and then boost charging, the charging time can be shortened and the user's anxiety about replenishing energy can be reduced. This strategy is particularly effective in shortening the charging time on 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 end, triggering the charging pile to re-enter the charging process instead of directly ending charging, avoiding charging failure caused by the conditions of step S103, step S107 and step S116 not being met, and realizing charging remediation.

[0074] In the embodiment of the present application, when the conditions of step S103, step S107 and step S116 are not met, it indicates that the output of the charging pile is abnormal or the voltage platform type of the charging pile is incorrectly identified. In order to avoid charging failure caused by the above-mentioned situations, the embodiment of the present application further provides a vehicle global voltage charging control method for such scenarios, referring to Figure 4 , the method comprising: S201, when it is identified that the output of the charging pile is abnormal or the voltage platform type of the charging pile is incorrectly identified, obtain the value of a preset flag bit.

[0075] S202: If the value of the preset flag is a first preset value, before receiving the CML message sent by the charging pile, performing boost pre-charging on the battery pack.

[0076] S203: If the value of the preset flag bit is a second preset value, before receiving the CML message sent by the charging pile, perform boost pre-charging on the battery pack.

[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 the first type voltage platform, and boost charging 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 voltage platform. The battery pack is first fast-charged. 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 boosted and charged.

[0079] Among them, the recognition of abnormal output of the charging pile or incorrect identification of the voltage platform type of the charging pile corresponds to the time point when the battery management system BMS sends a BEM message to the charging pile end; after the charging pile receives the BEM message, it will re-enter the charging process.

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

[0081] In the embodiment of the present application, a long time refers to a 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 end; the requested current and requested voltage of the vehicle end refer to the relevant parameters carried in the BCL message sent by the battery management system to the charging pile.

[0082] If the output voltage of the charging pile is lower than the vehicle's requested voltage for a prolonged period, the vehicle may not be able to charge and may instead discharge the battery, resulting in charging failure. If the output voltage of the charging pile 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 the fast-charging state to the boost-charging state may cause the switches to close under load, endangering their lifespan. Consequently, the switches cannot be switched, preventing the charging state from being switched. Therefore, when either of these situations occurs, it indicates an abnormality in the charging pile's output. To continue charging the battery pack, the battery management system (BMS) must proactively trigger a charge remediation mechanism, executing steps S202-S205.

[0083] In this embodiment of the present application, when the value of the preset flag is the first preset flag, it means 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 drop to a safe value for a long time, which may cause the charging pile to automatically terminate charging. Therefore, when this type of problem is identified, the embodiment of the present application performs active charging remediation through steps S201-S205.

[0084] In conjunction with steps S102-S109 and S114-S121, when the value of the preset flag is the first preset flag or the second preset flag, it indicates that an abnormality has occurred during the charging process. Therefore, before the CML message is sent, there is no need to match the voltage platform type of the charging pile based on the insulation detection voltage. The battery pack is first boosted and pre-charged to minimize the charging time.

[0085] In the embodiment of the present application, the voltage platform type of the charging pile is determined based on the relative size relationship between the maximum output voltage of the charging pile and the lower limit voltage and upper limit voltage of the battery pack.

[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 a first-class 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 a second-class 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 a third-class voltage platform.

[0087] The voltage platform type matching error of the charging pile means that after the voltage platform type of the charging pile is determined based on the relative size relationship between the maximum output voltage of the charging pile and the lower limit voltage and upper limit voltage of the battery pack, the matching result is inconsistent with the size relationship between the maximum output voltage of the charging pile and the real-time voltage of the battery pack and the aforementioned relationship.

[0088] When abnormal output of the charging pile is identified or the voltage platform type of the charging pile is incorrectly identified, charging remedial action is performed to avoid directly entering the charging failure state; when the value of the preset flag bit is the first preset flag bit or the second preset flag bit, before receiving the CML message sent by the charging pile, the battery pack is pre-charged with a boost voltage, and there is no need to judge the voltage platform type based on the insulation detection voltage, thereby shortening the charging time; after receiving the CML message, a reasonable judgment is made based on the maximum output voltage of the charging pile and the real-time voltage of the battery pack, and a more appropriate charging method is selected to shorten the charging time as much as possible.

[0089] Reference Figure 5 , the embodiment of the present application further provides a charging control device, comprising: The preset flag bit acquisition module 101 is used to obtain the value of the preset flag bit when it is identified that the charging pile output is abnormal or the voltage platform type of the charging pile is incorrectly identified; The first charging control module 102 is configured to, if the value of the preset flag bit is a first preset value, perform boost pre-charging on the battery pack before receiving a CML message sent by the charging pile; and perform boost charging on the charging pile after receiving the CML message; The second charging control module 103 is used 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, first fast charge the battery pack, and then boost charge the battery pack when the real-time voltage of the battery pack, the output voltage and the output current of the charging pile meet their respective set requirements.

[0090] Preferably, the device further comprises: The insulation detection voltage acquisition module 104 is used to obtain the insulation detection voltage of the charging pile in response to the connection operation between the vehicle and the charging pile; The pre-charging module 105 is configured to perform a boost pre-charging on the battery pack before receiving a CML message sent by the charging pile if the insulation detection voltage of the charging pile is lower than the upper limit voltage of the battery pack; The third charging control module 106 is configured to, after receiving the CML message, determine that the voltage platform type of the charging pile is a first-class 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; The fourth charging control module 107 is configured to determine that the voltage platform type of the charging pile is 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, first fast-charge the battery pack, and then boost charge 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 comprises: The voltage platform type identification module 108 is configured 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 configured to quickly charge the battery pack if the voltage platform type of the charging pile matches correctly; The preset flag setting module 110 is configured 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 comprises: A BCL message sending module is used to send a BCL message containing a battery charging requirement voltage to the charging pile, where the battery charging requirement voltage is greater than the maximum output voltage of the charging pile corresponding to the first type voltage platform; The charging port voltage judgment module is used to determine whether the voltage platform of the charging pile is actually the second type voltage platform based on the charging port voltage; a sixth charging control module, configured to execute a step of fast charging the battery pack if the voltage platform is the second type; The seventh charging control module is used to determine that the voltage platform type of the charging pile is a first-class voltage platform if it is not a second-class voltage platform, exit fast charging of the battery pack, and 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 charging the battery pack.

[0093] The charging control device in the embodiment of the present application corresponds to the vehicle global voltage charging control method in the above embodiment and can achieve the same technical effects as the above method. That is, when an abnormal output of the charging pile is identified, charging remediation is actively performed based on the value of a preset flag bit, and an appropriate charging method is selected to continue charging the battery pack.

[0094] An embodiment of the present application also provides a storage medium on which a computer program is stored. When the computer program is run on a computer, the computer is enabled to execute the vehicle global voltage charging control method as described above.

[0095] An embodiment of the present application also provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor calls the computer program to execute the vehicle global voltage charging control method as described above.

[0096] An embodiment of the present application also provides a vehicle, comprising the above-mentioned charging control device.

[0097] Figure 6 FIG2 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 another type of vehicle. Vehicle 200 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0098] Reference Figure 6In some embodiments, the vehicle 200 can 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 can include more or fewer subsystems, and each subsystem can include multiple components. In addition, each subsystem and each component of the vehicle 200 can be interconnected through wired or wireless means. In some embodiments, the infotainment system 210 can include a communication system, an entertainment system, a navigation system, and the like.

[0099] The perception system 220 can include several sensors for sensing information of the environment surrounding the vehicle 200. For example, the perception system 220 can include a global positioning system (which can be a GPS system, a Beidou system, or other positioning system), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0100] The decision control system 230 can include a computing system, a vehicle controller, a steering system, a throttle, and a braking system. The drive system 240 can include components that provide power motion for the vehicle 200. In one embodiment, the drive system 240 can include an engine, an energy source, a transmission system, and wheels. The engine can be one or a combination of an internal combustion engine, an electric motor, an air compression engine. The engine can convert energy provided by the energy source into mechanical energy.

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

[0102] The processor 251 can be any conventional processor, such as commercially available CPUs. The processor can also include a graphic process 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 may be implemented by any type of volatile or non-volatile memory 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 memory, flash memory, magnetic disk, or optical disk.

[0104] In addition to instructions 253 , memory 252 may also store data, such as road maps, route information, and data on the vehicle's location, direction, speed, etc. The data stored in memory 252 may be used by computing platform 250 .

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

[0106] Furthermore, the word "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 over other aspects or designs. Rather, the use of the word exemplary is intended to present concepts 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 to A or B" is intended to mean any of the natural inclusive permutations. That is, if X applies to A; X applies to B; or X applies to both A and B, then "X applies to A or B" satisfies any of the aforementioned instances. Furthermore, the articles "a" and "an," as used in this application and the appended claims, are generally understood to mean "one or more," unless otherwise specified or clear from the context to refer to the singular form.

[0107] Likewise, although the present 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 after reading and understanding the specification and drawings. The present 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 terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if structurally not equivalent to the disclosed structures. In addition, although specific features of the present 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 beneficial for any given or specific application. In addition, with respect to the terms "including," "having," "having," "having," or variations thereof used in the specific embodiments or claims, such terms are intended to be inclusive in a manner similar to the term "comprising."

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

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

[0110] It should be noted that the terms "first," "second," and the like in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure as detailed in the appended claims.

[0111] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", "an example", "a specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0112] Any process or method descriptions or descriptions of the flow diagrams in the specification or elsewhere in this document, can be understood as representing the steps of any one or more of the methods or processes, including a computer program in which the functions of each step are implemented, and the preferred embodiments of the present disclosure include additional implementations in which the functions of the steps are implemented in the order shown or discussed, including substantially simultaneously, in reverse order, or in other orders, depending on the functionality involved, as will be understood by those skilled in the art of the embodiments to which this disclosure belongs.

[0113] The logic and / or steps represented in the flow diagrams or otherwise described herein, for example, can be considered as a list of steps to be executed in a certain order, and the preferred embodiments of the present disclosure include additional implementations in which the steps are executed in an order different from that shown or discussed, including substantially simultaneously, in reverse order, or in other orders, depending on the functionality involved, as will be understood by those skilled in the art of the embodiments to which this disclosure belongs.

[0114] It should be understood that the various parts of the embodiments of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0115] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0116] In addition, the functional units in the various embodiments of the present disclosure may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disk, etc.

[0117] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A vehicle global voltage charging control method, characterized in that: include: When an abnormal output of the charging pile is detected or the voltage platform type of the charging pile is incorrectly identified, the value of the preset flag bit is obtained; If the value of the preset flag bit is a first preset value, before receiving the CML message sent by the charging pile, the battery pack is boosted and pre-charged; after receiving the CML message, the battery pack is boosted and charged; If the value of the preset flag is a second preset value, before receiving the CML message sent by the charging pile, the battery pack is first boosted and pre-charged; 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 a first type voltage platform, and the battery pack is boosted and charged; 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 a second type voltage platform, the battery pack is first fast-charged, and the battery pack is boosted and charged when the real-time voltage of the battery pack, the output voltage and output current of the charging pile meet their respective set requirements.

2. The vehicle global voltage charging control method according to claim 1, characterized in that: The method further comprises: In response to a connection operation between the vehicle and the charging pile, obtaining an insulation detection voltage of the charging pile; If the insulation detection voltage of the charging pile is lower than the upper limit voltage of the battery pack, the battery pack is pre-charged 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, determining that the voltage platform type of the charging pile is a first type voltage platform, and performing 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, the voltage platform type of the charging pile is determined to be the second type voltage platform. The battery pack is first fast-charged. 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 boosted and charged.

3. The vehicle global voltage charging control method according to claim 2, characterized in that: The method further comprises: If the insulation detection voltage of the charging pile is greater than the upper limit voltage of the battery pack, identify whether the voltage platform type matching of the charging pile is incorrect according to the CML message sent by the charging pile; If the voltage platform type of the charging pile matches correctly, the battery pack will be quickly charged; 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, when the real-time voltage of the battery pack, the output voltage and the output current of the charging pile meet their respective set requirements, and before the step of boost charging the battery pack, the method further includes: If the output current of the charging pile does not meet the corresponding set 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 global voltage charging control method according to claim 2, characterized in that: After the step of fast charging the battery pack, when the real-time voltage of the battery pack, the output voltage and the output current of the charging pile meet their respective set requirements, and before the step of boost charging the battery pack, 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 global voltage charging control method according to claim 1 or 2, characterized in that: The battery pack is first fast-charged. 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 battery pack is then boosted and charged. The steps include: During fast charging, determine whether the output voltage of the charging pile can meet the vehicle's request; If the output voltage of the charging pile follows the vehicle-side 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 and charged.

7. The vehicle global voltage charging control method according to any one of claims 1 to 6, characterized in that: Before the step of quickly charging the battery pack, the method further includes: Sending a BCL message containing a battery charging requirement voltage to the charging pile, where the battery charging requirement voltage is greater than the maximum output voltage of the charging pile corresponding to the first voltage platform; Determine whether the voltage platform of the charging pile is actually the second type voltage platform based on the voltage of the charging port; If it is the second voltage platform, then the step of fast charging the battery pack is performed; If it is not a second-class voltage platform, determine that the voltage platform type of the charging pile is a first-class voltage platform, exit 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 charging the battery pack.

8. A vehicle global voltage charging control device, characterized in that: include: A preset flag bit acquisition module is used to obtain the value of the preset flag bit when an abnormal output of the charging pile is identified or an error is made in identifying the voltage platform type of the charging pile; A first charging control module is configured to, if the value of the preset flag bit is a first preset value, perform boost pre-charging on the battery pack before receiving a CML message sent by the charging pile; and 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, quickly charge the battery pack first, and then boost charge the battery pack when the real-time voltage of the battery pack, the output voltage and the 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 comprises: An insulation detection voltage acquisition module is used to obtain the insulation detection voltage of the charging pile in response to the connection operation between the vehicle and the charging pile; A pre-charging module is configured to perform a boost pre-charging on the battery pack before receiving a CML message sent by the charging pile if the insulation detection voltage of the charging pile is lower than the upper limit voltage of the battery pack; a third charging control module, configured to, after receiving the CML message, determine that the voltage platform type of the charging pile is a first-class 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; The fourth charging control module is used to determine that the voltage platform type of the charging pile is 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, first fast charge the battery pack, and then boost charge the battery pack when the real-time voltage of the battery pack, the output voltage and the output current of the charging pile meet their respective set requirements.

10. The vehicle global voltage charging control device according to claim 7, characterized in that: The device further comprises: A 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; A fifth charging control module is used to quickly charge the battery pack if the voltage platform type of the charging pile matches correctly; 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 send a BEM message to the charging pile.

11. The vehicle global voltage charging control device according to any one of claims 7 to 10, characterized in that: The device further comprises: A BCL message sending module is used to send a BCL message containing a battery charging requirement voltage to the charging pile, where the battery charging requirement voltage is greater than the maximum output voltage of the charging pile corresponding to the first type voltage platform; The charging port voltage judgment module is used to determine whether the voltage platform of the charging pile is actually the second type voltage platform based on the charging port voltage; a sixth charging control module, configured to execute a step of fast charging the battery pack if the voltage platform is the second type; The seventh charging control module is used to determine that the voltage platform type of the charging pile is a first-class voltage platform if it is not a second-class voltage platform, exit fast charging of the battery pack, and 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 charging the battery pack.

12. A vehicle, characterized in that: Including the vehicle full-range voltage charging control device as described in any one of claims 8-11.

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