A charging control method, device and vehicle

Abstract

To address the problem in existing technologies where abnormal output from charging piles leads to abnormal vehicle charging or even charging interruption, this application provides a charging control method, device, and vehicle. The charging control method includes: during DC charging of the vehicle's battery, acquiring the actual charging current of the power battery and the output current sent by the charging pile; determining an overcurrent ratio based on the actual charging current and the output current sent by the charging pile; determining that the charging pile output is unreliable when the overcurrent ratio exceeds a preset threshold and the duration of the overcurrent ratio exceeds a first preset duration; and adjusting the charging demand current of the power battery according to the overcurrent ratio, so that the charging pile adjusts its output current according to the adjusted charging demand current.

Description

Technical Field

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

[0002] With the rapid popularization of new energy vehicles, DC fast charging technology has become the main direction for the construction of electric vehicle charging infrastructure due to its advantages such as high energy replenishment efficiency and good user experience. During DC charging, the vehicle's battery management system (BMS) calculates the optimal charging request current based on the battery's current state (such as SOC, cell voltage, temperature, and health) and sends a charging request to the charging station via a communication protocol (such as GB / T 27930). Ideally, the charging station should strictly follow the vehicle's requested current output to achieve efficient and safe energy replenishment. However, in practical applications, the DC charging process may be affected by various factors (such as charging station aging and communication delays), which may cause the actual output current of the charging station to exceed the vehicle's requested current, leading to charging abnormalities or even termination.

[0003] To prevent high-current surges from damaging the battery cells or causing thermal runaway, the BMS (Battery Management System) typically reports a fault and requests a halt to charging immediately upon detecting that the actual input current exceeds a certain threshold (even if the overcurrent is caused by abnormal output at the charging station). This not only interrupts a single charging session, forcing users to re-plug the charger or replace the charging station, severely reducing charging success rate and user satisfaction; frequent unexpected interruptions and current surges also accelerate battery aging and shorten the lifespan of the power battery. Summary of the Invention

[0004] To address the problem in existing technologies where abnormal output at the charging pile causes abnormal vehicle charging or even charging interruption, this application provides a charging control method, device, and vehicle.

[0005] The technical solution of this application is as follows:

[0006] This application provides a charging control method, including:

[0007] During the DC charging process of the vehicle's battery, the actual charging current of the power battery and the output current sent by the charging pile are obtained;

[0008] The overcurrent ratio is determined based on the actual charging current and the output current sent by the charging pile;

[0009] When the overcurrent ratio is greater than a preset ratio threshold and the duration of the overcurrent ratio is greater than a first preset duration, the output of the charging pile is determined to be unreliable.

[0010] Based on the overcurrent ratio, the charging current demand of the power battery is adjusted so that the charging pile adjusts its output current according to the adjusted charging current demand.

[0011] By simultaneously acquiring the actual current flowing into the battery (actual charging current) and the current claimed by the charging pile via communication messages (output current), the ratio between the two is calculated. When the actual charging current consistently exceeds the charging pile's output current, it indicates a problem with the charging pile's output control or communication anomaly. In this case, the vehicle's charging current demand is proactively reduced, and the adjusted demand current is sent to the charging pile, causing the charging pile to output at a lower target value, thus bringing the actual charging current back within a safe range. This ratio-based judgment method can accurately identify issues with the reliability of the charging pile's output and smoothly reduce the current without interrupting charging. This avoids the charging interruption caused by overcurrent triggering relay disconnection in traditional solutions. Furthermore, because the adjustment is based on the deviation between the actual and claimed values, rather than a fixed threshold, it can adapt to the differences between different charging piles, ensuring both charging safety and maintaining the continuity of the charging process.

[0012] In some possible embodiments, the overcurrent ratio is the ratio of the actual charging current to the output current sent by the charging pile.

[0013] This ratio calculation method eliminates the influence of individual differences in charging piles and the magnitude of absolute current values. Whether the actual charging current is 50A or 200A, this ratio directly reflects whether the charging pile's output deviates from its claimed value. When the ratio exceeds 100%, it means the actual output current of the charging pile is greater than the output current it tells the vehicle to receive; this is a relative rather than an absolute judgment. Compared to directly comparing the actual current with a fixed threshold, the ratio method can more sensitively identify issues with the reliability of the charging pile's output. Even if the absolute value of the actual current is not high, it will be detected as long as it exceeds the pile's claimed value, allowing for intervention in the early stages of fault accumulation, achieving earlier risk warnings and more precise control.

[0014] In some possible embodiments, the step of adjusting the charging current demand of the power battery according to the overcurrent ratio includes:

[0015] The adjustment factor is determined based on the maximum value of the overcurrent ratio during this charging process;

[0016] Multiply the original charging demand current by the reduction coefficient to obtain the adjusted charging demand current.

[0017] By introducing the maximum overcurrent ratio during this charging process to determine the reduction coefficient, and multiplying the charging demand current before adjustment with the reduction coefficient to obtain the adjusted charging demand current, the technical advantages are as follows: A one-time proportional correction based on the most severe historical pile-end output deviation ensures that the adjustment range is sufficient to cope with the worst-case scenario, avoiding repeated triggering of overcurrent protection; simultaneously, the multiplication method ensures that the adjusted current scales in the same direction as the original requested current, adaptively tracking changes in battery state, which is more accurate than fixed reduction adjustment; furthermore, the one-time correction strategy avoids the oscillations and delays that may be caused by iterative cycles, simplifies the control logic, and ensures the stability of the charging demand current.

[0018] In some possible embodiments, the down-adjustment factor is determined to be the reciprocal of the maximum value of the overcurrent ratio.

[0019] For example, when the maximum overcurrent ratio is 120%, its reciprocal is approximately 83.3%. The adjusted charging demand current is 83.3% of the original requested current. This ensures that, under the same output deviation, the actual output current of the charging pile is exactly equal to the safe target value corresponding to the original requested current, achieving precise deviation compensation. Because the reciprocal relationship can completely offset the excess output caused by the historical maximum overcurrent ratio, the adjusted requested current multiplied by the same overcurrent ratio returns to the level of the original requested current. Mathematically, this guarantees that no matter how large the overcurrent ratio is, the adjusted actual current can accurately return to the expected safe range, without repeated trials or gradual approximation, completing the correction in one step.

[0020] In some possible embodiments, the method further includes:

[0021] When the overcurrent ratio is greater than the preset ratio threshold and the duration of the overcurrent ratio is greater than the first preset duration, the untrusted status flag of the charging pile communication current is set to the target value.

[0022] During this charging process, when the unreliable status flag of the charging pile communication current is at the target value, a request is continuously sent to the charging pile according to the adjusted charging demand current until the charging process ends.

[0023] Once an unreliable output issue is confirmed at the charging station, the status flag is latched and not reset. This prevents repeated entry and exit of overcurrent protection due to the charging station's output briefly returning to normal, thus avoiding control oscillations caused by repeated entry and exit of protection. The adjusted current request is continuously sent to ensure the entire remaining charging process remains within safe boundaries, preventing overcurrent triggering due to subsequent random fluctuations in the charging station's performance. Simultaneously, locking the correction status once simplifies the control logic, eliminating the need for repeated checks and adjustments during subsequent charging, reducing the system's computational burden and response latency, and ensuring the continuity and stability of the charging process.

[0024] This application also provides a charging control device, including:

[0025] The acquisition module is used to acquire the actual charging current of the power battery and the output current sent by the charging pile during the DC charging process of the vehicle's battery;

[0026] The first determining module is used to determine the overcurrent ratio based on the actual charging current and the output current sent by the charging pile;

[0027] The second determining module is used to determine that the output of the charging pile is unreliable when the overcurrent ratio is greater than a preset ratio threshold and the duration of the overcurrent ratio is greater than a first preset duration.

[0028] An adjustment module is used to adjust the charging current demand of the power battery according to the overcurrent ratio, so that the charging pile adjusts the output current according to the adjusted charging current demand.

[0029] In some possible embodiments, the overcurrent ratio is the ratio of the actual charging current to the output current sent by the charging pile.

[0030] In some possible embodiments, the first determining module includes:

[0031] The reduction coefficient determination unit is used to determine the reduction coefficient based on the maximum value of the overcurrent ratio during this charging process;

[0032] The adjustment unit is used to multiply the charging demand current before adjustment by the downward adjustment coefficient to obtain the adjusted charging demand current.

[0033] In some possible embodiments, the device further includes:

[0034] The setting module is used to set the untrusted status flag of the charging pile communication current to the target value when the overcurrent ratio is greater than the preset ratio threshold and the duration of the overcurrent ratio is greater than the first preset duration.

[0035] During this charging process, when the unreliable status flag of the charging pile communication current is at the target value, a request is continuously sent to the charging pile according to the adjusted charging demand current until the charging process ends.

[0036] This application also provides a vehicle including the aforementioned charging control device. Attached Figure Description

[0037] Figure 1 This is a structural block diagram of the vehicle in the embodiments of this application;

[0038] Figure 2This is a flowchart illustrating the charging control method in the embodiments of this application;

[0039] Figure 3 This is a structural block diagram of the charging control device in the embodiments of this application. Detailed Implementation

[0040] Reference Figure 1 This application provides a vehicle that includes the following physical hardware:

[0041] The power battery pack 101 consists of multiple cells connected in series or parallel, used to store electrical energy and provide power to the vehicle.

[0042] The current sensor 102 is connected in series in the main circuit of the power battery pack 101 to collect the actual charging current flowing into the power battery pack 101 in real time during DC charging.

[0043] The battery management system controller 103 is an electronic control unit containing a microprocessor and a memory. Its input terminal is electrically connected to the output terminal of the current sensor 102, and its communication interface is connected to the charging interface 104 via a CAN bus for data interaction with the charging pile.

[0044] The charging interface 104, also known as the DC charging socket, is connected to the power battery pack 101 via a high-voltage wiring harness and to the battery management system controller 103 via a low-voltage CAN bus. It is used to connect the charging gun to the charging pile.

[0045] During DC charging, once the charging gun is inserted into the vehicle's charging port 104, the charging pile establishes a CAN communication connection with the vehicle's battery management system controller 103. The battery management system controller 103 determines an initial charging current demand based on the current state of charge and temperature of the power battery pack 101 using a lookup table, and sends this demand to the charging pile via a CAN message. Upon receiving the charging current demand, the charging pile adjusts its internal power modules accordingly, outputting a corresponding DC current to the power battery pack 101 through the charging gun and high-voltage wiring harness.

[0046] However, in actual charging processes, due to equipment accuracy deviations, response delays, or internal faults in charging piles, the actual output current of the charging pile often exceeds the output current value it sends to the vehicle via CAN messages. This mismatch between the charging pile's output current and the communication value causes an abnormally high actual current flowing into the battery. Since the vehicle's battery management system only monitors whether the absolute current value exceeds a fixed fault threshold, it cannot identify this relative deviation. This can easily cause the battery to be in an unexpected overcurrent state for extended periods, damaging battery life and safety, and even triggering overcurrent protection, leading to charging interruption and severely impacting the user's charging experience.

[0047] Therefore, referring to Figure 2 This application provides a charging control method, including:

[0048] S101, during the DC charging process of the vehicle's battery, acquires the actual charging current of the power battery and the output current sent by the charging pile;

[0049] S102, determine the overcurrent ratio based on the actual charging current and the output current sent by the charging pile;

[0050] S103, when the overcurrent ratio is greater than a preset ratio threshold and the duration of the overcurrent ratio is greater than a first preset duration, the output of the charging pile is determined to be unreliable.

[0051] S104, adjust the charging current demand of the power battery according to the overcurrent ratio, so that the charging pile adjusts the output current according to the adjusted charging current demand.

[0052] In step S101, the battery management system controller 103 continuously collects the actual charging current flowing into the battery pack at a millisecond sampling frequency using a current sensor 102 connected in series in the main circuit of the power battery pack 101. The current sensor 102 converts the analog signal into a digital quantity and transmits it to the microprocessor. Simultaneously, the battery management system controller 103 receives periodically transmitted broadcast messages from the charging pile via the CAN bus. These messages contain the current value claimed by the charging pile as it is outputting. Both sets of data are acquired synchronously within the same time window, forming a one-to-one corresponding detection sample. To ensure the accuracy and stability of the data, the battery management system controller 103 filters the actual charging current values ​​over multiple consecutive sampling periods to remove instantaneous spike noise and performs timeout checks on the output current transmitted by the charging pile to ensure the communication link is normal and the data is valid. The two sets of acquired data are temporarily stored in memory as the basis for subsequent overcurrent ratio calculations.

[0053] In step S102, the battery management system controller 103 reads two key data points collected within the same time window from the memory: one is the actual charging current value obtained by the current sensor 102, and the other is the output current value sent by the charging pile via the CAN bus. The controller first verifies the validity of the two sets of data, including checking whether the data is within a reasonable range and whether there are any abnormalities such as communication timeouts or missing data. Only when both sets of data are valid will the overcurrent ratio calculation continue.

[0054] Furthermore, the battery management system controller 103 determines whether the output current sent by the charging pile is greater than zero. Since this value is used as the denominator in the division operation, the division operation is meaningless if its value is zero or negative. When the output current sent by the charging pile is detected to be less than or equal to zero, the battery management system controller 103 skips the current calculation, waits for the data of the next sampling cycle, and records a communication anomaly event. Subsequent division operations are only performed after confirming that the value is greater than zero.

[0055] The battery management system controller 103 uses the actual charging current as the numerator and the output current sent by the charging pile as the denominator, performs a division operation, and calculates the ratio between the two. This ratio reflects the relationship between the actual charging current and the claimed output current of the charging pile. When the ratio is equal to 1, it means that the actual current is equal to the claimed value of the charging pile; when the ratio is greater than 1, it means that the actual current exceeds the claimed value of the charging pile; when the ratio is less than 1, it means that the actual current is lower than the claimed value of the charging pile.

[0056] Multiply the calculated ratio by 100% to convert it into a percentage overcurrent ratio. For example, a ratio of 1.2 corresponds to an overcurrent ratio of 120%, and a ratio of 0.95 corresponds to an overcurrent ratio of 95%. The percentage form more intuitively reflects the deviation of the actual current from the claimed value of the pile.

[0057] The battery management system controller 103 repeats the above calculation process in each sampling period, updating the current overcurrent ratio in real time and storing the calculated overcurrent ratio value in memory. To ensure data continuity, the controller uses a sliding window method to maintain the time series of the overcurrent ratio, providing historical data for subsequent duration determination.

[0058] To eliminate instantaneous spikes caused by electromagnetic interference or sampling noise, the battery management system controller 103 can filter the overcurrent ratio calculated over multiple consecutive cycles. Filtering methods include, but are not limited to, average value filtering, median filtering, or first-order low-pass filtering. The filtered overcurrent ratio is smoother and more stable, effectively avoiding misjudgments caused by instantaneous fluctuations.

[0059] In addition to calculating the current overcurrent ratio in real time, the battery management system controller 103 also continuously tracks the maximum overcurrent ratio that has occurred during this charging process. Whenever a new overcurrent ratio is calculated, the controller compares it with the recorded historical maximum value. If the current value is greater than the historical maximum value, the historical maximum value is updated with the current value. This historical maximum overcurrent ratio is stored separately for determining the subsequent adjustment factor.

[0060] In step S103, the preset ratio threshold is set to 100%. When the overcurrent ratio is greater than 100%, it means that the actual charging current is greater than the output current sent by the charging pile. Physically speaking, the output current sent by the charging pile is the current value that the pile itself tells the vehicle through a CAN message, while the actual charging current is the current value measured by the vehicle through sensors. Theoretically, these two values ​​should be equal, but in practice, a small measurement error is allowed. However, when the actual current is consistently greater than the value claimed by the charging pile, it indicates that the actual output behavior of the charging pile is inconsistent with its communication information, and there is a possibility of uncontrolled output or communication fraud. Therefore, setting 100% as the threshold has a clear physical meaning; exceeding this threshold indicates an anomaly.

[0061] Judging a current as unreliable solely based on a momentary overcurrent exceeding 100% is prone to misjudgment. This is because current acquisition involves various possible momentary disturbances, such as electromagnetic interference causing sensor sampling spikes, data packet loss or delays on the communication bus, and momentary overshoot from the charging pile's internal power module. These disturbances are typically extremely short-lived, disappearing within milliseconds and posing no substantial threat to battery safety. Responding to all these momentary fluctuations would cause the system to frequently enter protection mode, repeatedly requesting current adjustments, impacting charging stability and user experience. Therefore, a duration condition is set as a second layer of screening; only when the overcurrent ratio consistently remains above 100% for an extended period exceeding the first preset duration is it confirmed as a genuine, continuous anomaly rather than a momentary disturbance.

[0062] By combining proportional and duration conditions, a two-tiered judgment mechanism is formed. The proportional condition ensures that the anomaly actually exists, meaning the actual current does exceed the charge station's claimed value; the duration condition ensures that the anomaly is continuous rather than sporadic. Only when both conditions are met simultaneously is the charging station deemed to be in an unreliable output state. This judgment method ensures the accuracy of anomaly detection while avoiding ineffective adjustments caused by false triggers, achieving a balance between safety and stability. The specific value of the first preset duration can be calibrated according to the actual application scenario. For example, setting it to 2 seconds can filter out most instantaneous disturbances while still allowing for timely response when the anomaly persists.

[0063] In step S104, the battery management system controller 103 determines an adjustment strategy based on the previously calculated overcurrent ratio, particularly the maximum overcurrent ratio that occurred during the current charging process. Since the overcurrent ratio reflects the deviation of the actual output current of the charging pile from its claimed output current, this ratio directly determines the required adjustment range. A larger overcurrent ratio indicates a more severe output deviation at the charging pile, requiring a greater adjustment; a ratio closer to 100% indicates a smaller deviation, requiring only a slight adjustment.

[0064] The battery management system controller 103 uses the maximum overcurrent ratio as the adjustment basis to calculate a reduction coefficient. The mathematical significance of this coefficient lies in its ability to completely offset the charging pile's output deviation. For example, if the historical maximum overcurrent ratio is 120%, meaning the charging pile's actual output reaches 1.2 times its claimed value, then multiplying the charging demand current by approximately 83.3% ensures that the adjusted demand current, multiplied by the same output deviation, falls precisely back to the expected value level corresponding to the original demand current. This calculation method based on a reciprocal relationship enables precise compensation in one step.

[0065] The battery management system controller 103 multiplies the original charging demand current by a downward adjustment factor to generate the adjusted charging demand current. The original charging demand current is the optimal charging current obtained by looking up a table based on the battery's current state of charge and temperature, representing the expected charging current the battery should receive in its current state. The adjusted charging demand current is obtained by multiplying this value by a factor less than 1, resulting in a lower requested value. This adjusted current value considers both the battery's own charging needs and the output deviation characteristics of the charging station, achieving a balance between safety and efficiency.

[0066] The battery management system controller 103 sends the adjusted charging current demand to the charging pile via a CAN message. Upon receiving the new current request, the charging pile adjusts the output parameters of its power module according to its internal control logic, gradually reducing the output current to a level that matches the adjusted current demand. Because there is a certain response delay in the charging pile's output adjustment, the controller does not expect the output current to drop immediately, but continuously monitors the subsequent actual charging current to confirm whether it has fallen back to a safe range.

[0067] After sending the adjusted charging demand current, the battery management system controller 103 continues to monitor the actual charging current value through the current sensor 102 and continuously calculates the overcurrent ratio. When the overcurrent ratio drops below 100%, it indicates that the adjustment has taken effect, the actual output of the charging pile no longer exceeds its claimed value, and the battery charging process returns to a safe state. Since the adjustment is based on the most severe deviation during this charging process, even if the pile deviation does not improve in subsequent charging processes, the actual current will not exceed the safety limit again, so repeated adjustments are unnecessary.

[0068] To ensure safety throughout the remaining charging process, the battery management system controller 103 sets the unreliable status flag for the charging pile communication current to 1, and this status remains unchanged until the end of the current charging phase. As long as this flag is 1, the controller continues to send requests to the charging pile according to the adjusted charging demand current, without reverting to the original requested current. This locking mechanism avoids the risk of overcurrent oscillations caused by the charging pile output occasionally returning to a brief period of normal operation and easily exiting the safe state.

[0069] Reference Figure 3 This application also provides a charging control device, including:

[0070] The acquisition module 201 is used to acquire the actual charging current of the power battery and the output current sent by the charging pile during the DC charging process of the vehicle's battery.

[0071] The first determining module 202 is used to determine the overcurrent ratio based on the actual charging current and the output current sent by the charging pile;

[0072] The second determining module 203 is used to determine that the output of the charging pile is unreliable when the overcurrent ratio is greater than a preset ratio threshold and the duration of the overcurrent ratio is greater than a first preset duration.

[0073] The adjustment module 204 is used to adjust the charging demand current of the power battery according to the overcurrent ratio, so that the charging pile adjusts the output current according to the adjusted charging demand current.

[0074] In some possible embodiments, the overcurrent ratio is the ratio of the actual charging current to the output current sent by the charging pile.

[0075] In some possible embodiments, the first determining module includes:

[0076] The reduction coefficient determination unit is used to determine the reduction coefficient based on the maximum value of the overcurrent ratio during this charging process;

[0077] The adjustment unit is used to multiply the charging demand current before adjustment by the downward adjustment coefficient to obtain the adjusted charging demand current.

[0078] In some possible embodiments, the device further includes:

[0079] The setting module is used to set the untrusted status flag of the charging pile communication current to the target value when the overcurrent ratio is greater than the preset ratio threshold and the duration of the overcurrent ratio is greater than the first preset duration.

[0080] During this charging process, when the unreliable status flag of the charging pile communication current is at the target value, a request is continuously sent to the charging pile according to the adjusted charging demand current until the charging process ends.

[0081] The aforementioned device is a device that corresponds one-to-one with the aforementioned method, and it has the same effect as the aforementioned method.

[0082] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application still fall within the scope of this application.

Claims

1. A charge control method characterized by, include: During the DC charging process of the vehicle's battery, the actual charging current of the power battery and the output current sent by the charging pile are obtained; The overcurrent ratio is determined based on the actual charging current and the output current sent by the charging pile; When the overcurrent ratio is greater than a preset ratio threshold and the duration of the overcurrent ratio is greater than a first preset duration, the output of the charging pile is determined to be unreliable. Based on the overcurrent ratio, the charging current demand of the power battery is adjusted so that the charging pile adjusts its output current according to the adjusted charging current demand.

2. The method of claim 1, wherein, The overcurrent ratio is the ratio of the actual charging current to the output current sent by the charging pile.

3. The method of claim 1, wherein, The step of adjusting the charging current demand of the power battery according to the overcurrent ratio includes: The adjustment factor is determined based on the maximum value of the overcurrent ratio during this charging process; Multiply the original charging demand current by the reduction coefficient to obtain the adjusted charging demand current.

4. The method of claim 3, wherein, The reduction coefficient is determined to be the reciprocal of the maximum value of the overcurrent ratio.

5. The method according to claim 1, characterized in that, The method further includes: When the overcurrent ratio is greater than the preset ratio threshold and the duration of the overcurrent ratio is greater than the first preset duration, the untrusted status flag of the charging pile communication current is set to the target value. During this charging process, when the unreliable status flag of the charging pile communication current is at the target value, a request is continuously sent to the charging pile according to the adjusted charging demand current until the charging process ends.

6. A charging control device, characterized in that, include: The acquisition module is used to acquire the actual charging current of the power battery and the output current sent by the charging pile during the DC charging process of the vehicle's battery; The first determining module is used to determine the overcurrent ratio based on the actual charging current and the output current sent by the charging pile; The second determining module is used to determine that the output of the charging pile is unreliable when the overcurrent ratio is greater than a preset ratio threshold and the duration of the overcurrent ratio is greater than a first preset duration. An adjustment module is used to adjust the charging current demand of the power battery according to the overcurrent ratio, so that the charging pile adjusts the output current according to the adjusted charging current demand.

7. The apparatus according to claim 6, characterized in that, The overcurrent ratio is the ratio of the actual charging current to the output current sent by the charging pile.

8. The apparatus according to claim 6, characterized in that, The first determination module includes: The reduction coefficient determination unit is used to determine the reduction coefficient based on the maximum value of the overcurrent ratio during this charging process; The adjustment unit is used to multiply the charging demand current before adjustment by the downward adjustment coefficient to obtain the adjusted charging demand current.

9. The apparatus according to claim 6, characterized in that, The device further includes: The setting module is used to set the untrusted status flag of the charging pile communication current to the target value when the overcurrent ratio is greater than the preset ratio threshold and the duration of the overcurrent ratio is greater than the first preset duration. During this charging process, when the unreliable status flag of the charging pile communication current is at the target value, a request is continuously sent to the charging pile according to the adjusted charging demand current until the charging process ends.

10. A vehicle, characterized in that, Includes the charging control device according to any one of claims 6-9.

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