Air conditioning power control method and device, vehicle and storage medium

Abstract

The application provides a kind of air conditioner power control method, device, vehicle and storage medium.The method comprises: when detecting DC charging gun connection and receiving air conditioner opening request, obtaining real-time charging information of vehicle;According to the real-time charging information of vehicle, determine DC charging gun charging condition and high-voltage battery charging condition;According to DC charging gun charging condition and high-voltage battery charging condition, detect whether DC charging gun is abnormal;When DC charging gun is abnormal, determine the maximum power limit value of air conditioner according to high-voltage battery charging condition.The application can limit the maximum power of air conditioner when determining that DC charging gun is abnormal, solve the situation that high-voltage battery continuous discharge eventually leads to vehicle failure due to DC charging gun abnormality in prior art.

Description

Technical Field

[0001] This invention relates to the field of automotive control technology, and in particular to a method, device, vehicle, and storage medium for controlling air conditioning power. Background Technology

[0002] When charging a vehicle, direct current (DC) charging can be used. DC charging can generally provide a large charging power, so there is no need to limit the power consumption of high-voltage accessories on the vehicle. High-voltage accessories can generally include DC-DC converters, high-voltage batteries, and air conditioning equipment.

[0003] The power of high-voltage accessories in a vehicle can be allocated according to priority. For example, the power allocation priority of a DC-DC converter is generally higher than that of the air conditioner. During power allocation, after satisfying the power needs of the DC-DC converter and the air conditioner, the remaining power is used to charge the high-voltage battery.

[0004] However, the inventors discovered that in extremely cold weather or when the DC charging gun malfunctions, the output power of the DC charging gun cannot reach its maximum output power. This causes the power consumption of the vehicle's high-voltage accessories to exceed the charging power of the DC charging gun. This not only fails to charge the high-voltage battery but also causes the high-voltage battery to continuously discharge, ultimately leading to a malfunction in the entire vehicle. Summary of the Invention

[0005] This invention provides a method, device, vehicle, and storage medium for controlling air conditioning power, in order to solve the problem of continuous discharge of high-voltage batteries when a vehicle is charged by a DC charging gun in the prior art.

[0006] In a first aspect, embodiments of the present invention provide a method for controlling air conditioner power, comprising:

[0007] When a DC charging gun connection is detected and an air conditioning turn-on request is received, real-time vehicle charging information is obtained.

[0008] Based on the real-time charging information of the vehicle, the charging status of the DC charging gun and the charging status of the high-voltage battery are determined; wherein, the charging status of the DC charging gun includes the relationship between the actual output current of the DC charging gun and the maximum output current, and the relationship between the actual output current of the DC charging gun and the current corresponding to the power consumption of the high-voltage accessory; the charging status of the high-voltage battery includes whether the high-voltage battery meets the charging current requirements.

[0009] Based on the charging status of the DC charging gun and the charging status of the high-voltage battery, detect whether the DC charging gun is abnormal;

[0010] When the DC charging gun malfunctions, the maximum power limit of the air conditioner is determined based on the charging status of the high-voltage battery.

[0011] In one possible implementation, determining the charging status of the DC charging gun based on the vehicle's real-time charging information includes:

[0012] Based on the vehicle's real-time charging information, calculate the first difference between the DC charging gun's requested charging current and the actual output current.

[0013] In one possible implementation, the vehicle charging information includes: the maximum output current of the DC charging gun, the actual output current of the DC charging gun, the current corresponding to the charging request of the high-voltage battery, the actual current of the DC-DC converter, the actual current of the compressor, and the actual current of the heater (Positive Temperature Coefficient, PTC).

[0014] The step of calculating the first difference between the DC charging request current and the actual output current based on the vehicle's real-time charging information includes:

[0015] Calculate the sum of the current corresponding to the charging request of the high-voltage battery, the actual current of the DC-DC converter, the actual current of the compressor, and the actual current of the PTC;

[0016] Determine the minimum value between the maximum output current of the DC charging gun and the sum of the currents;

[0017] Calculate the difference between the minimum value and the actual output current of the DC charging gun to obtain the first difference between the charging request current and the actual output current of the DC charging gun.

[0018] In one possible implementation, determining the high-voltage battery charging status based on the vehicle's real-time charging information includes:

[0019] Based on the vehicle's real-time charging information, a second difference between the actual charging current and the minimum charging current of the high-voltage battery is calculated.

[0020] In one possible implementation, the vehicle charging information includes: the actual charging current of the high-voltage battery, the minimum temperature of the high-voltage battery, and the actual charge of the high-voltage battery.

[0021] The step of calculating the second difference between the actual charging current and the minimum charging current of the high-voltage battery based on the vehicle's real-time charging information includes:

[0022] The minimum charging current of the high-voltage battery is determined based on the lowest temperature of the high-voltage battery and the actual charge of the high-voltage battery.

[0023] The difference between the actual charging current of the high-voltage battery and the minimum charging current of the high-voltage battery is calculated to obtain the second difference.

[0024] In one possible implementation, detecting whether the DC charging gun is malfunctioning includes:

[0025] The system detects whether both the first and second conditions are met, and whether the duration after the first and second conditions are met is greater than or equal to a preset time threshold. The first condition is that the first difference is greater than a first current threshold, the second condition is that the second difference is greater than a second current threshold, and the first current threshold is greater than the second current threshold.

[0026] In one possible implementation, determining the maximum power limit of the air conditioner based on the charging status of the high-voltage battery when the DC charging gun malfunctions includes:

[0027] When the DC charging gun malfunctions, the second difference is updated according to the preset update cycle, and the maximum power limit of the air conditioner is determined based on the updated second difference while meeting the charging current requirements of the high-voltage battery.

[0028] Secondly, embodiments of the present invention provide an air conditioner power control device, comprising:

[0029] The acquisition module is used to acquire real-time vehicle charging information when a DC charging gun connection is detected and an air conditioning turn-on request is received.

[0030] The determination module is used to determine the charging status of the DC charging gun and the charging status of the high-voltage battery based on the real-time charging information of the vehicle. The charging status of the DC charging gun includes the relationship between the actual output current of the DC charging gun and the maximum output current, as well as the relationship between the actual output current of the DC charging gun and the current corresponding to the power consumption of the high-voltage accessory. The charging status of the high-voltage battery includes whether the high-voltage battery meets the charging current requirements.

[0031] The detection module is used to detect whether the DC charging gun is abnormal based on the charging status of the DC charging gun and the charging status of the high-voltage battery.

[0032] The determining module is also used to determine the maximum power limit value of the air conditioner based on the charging status of the high-voltage battery when the DC charging gun is abnormal.

[0033] Thirdly, embodiments of the present invention provide a terminal including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the air conditioning power control method as described in the first aspect or any possible implementation thereof.

[0034] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the air conditioning power control method as described in the first aspect or any possible implementation thereof.

[0035] This invention provides a method, device, vehicle, and storage medium for controlling air conditioning power. By limiting the maximum power of the air conditioner when a DC charging gun malfunction is detected, allowing the air conditioner to heat or cool at low power to meet the user's basic needs, this invention solves the problem in the prior art where continuous discharge of the high-voltage battery due to a DC charging gun malfunction ultimately leads to vehicle failure. Furthermore, this invention can acquire real-time vehicle charging information and determine the charging status of the DC charging gun and the high-voltage battery based on this information. Based on these charging statuses, it can detect whether the actual output capacity of the DC charging gun can reach its maximum output capacity, whether it can meet the current required for the power consumption of the high-voltage accessories, and whether the high-voltage battery meets the charging current requirements. These detections are integrated to determine whether the DC charging gun is malfunctioning. When an malfunction is detected, the air conditioning power can be limited based on the high-voltage battery charging status, ensuring that the high-voltage battery meets the charging current requirements. This further ensures normal vehicle power-on, thus solving the problem in the prior art where a DC charging gun malfunction is only discovered when the vehicle fails and loses power, resulting in reduced high-voltage battery life. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a flowchart illustrating the implementation of the air conditioner power control method provided in this embodiment of the invention.

[0038] Figure 2 This is a schematic diagram of the structure of the air conditioner power control device provided in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0040] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0042] Figure 1 A flowchart illustrating the implementation of an air conditioner power control method according to an embodiment of the present invention is described in detail below:

[0043] Step 101: When the DC charging gun connection is detected and the air conditioning turn-on request is received, obtain the vehicle's real-time charging information.

[0044] After the DC charging gun is connected, the vehicle uses DC power for charging. If a request to turn on the air conditioning is received, power needs to be allocated to the air conditioning. In existing technology, a malfunction in the DC charging gun can prevent it from reaching its maximum output power. This causes high-voltage accessories such as the air conditioner to consume more power than the DC charging gun can, ultimately preventing the high-voltage battery from charging and causing continuous discharge, resulting in a vehicle malfunction and power failure. Therefore, in this embodiment, while ensuring the high-voltage battery is fully charged, we limit the output power of the air conditioning to allow it to regulate the vehicle's interior temperature at low power.

[0045] Real-time vehicle charging information can include the maximum output current of the DC charging gun (IDCChrgMax), the actual output current of the DC charging gun (IActDCChrg), the current corresponding to the high-voltage battery charging request (IBattChrgReq), the actual current of the DC-DC converter (IDCDCAct), the actual current of the compressor (ICmpAct), the actual current of the PTC converter (IPtcAct), the actual charging current of the high-voltage battery (IBattAct), the minimum temperature of the high-voltage battery (TBattLo), and the actual charge level of the high-voltage battery (SocBattAct). The maximum output current of the DC charging gun, the current corresponding to the high-voltage battery charging request, the actual charging current of the high-voltage battery, the minimum temperature of the high-voltage battery, and the actual charge level of the high-voltage battery can be calculated by the vehicle's Battery Management System (BMS). The actual output current of the DC charging gun can be measured by sensors, the actual current of the DC-DC converter can be calculated by the DC-DC controller, and the actual currents of the compressor and PTC can be calculated by the air conditioning controller.

[0046] Step 102: Determine the charging status of the DC charging gun and the high-voltage battery based on the vehicle's real-time charging information.

[0047] The charging status of the DC charging gun includes the relationship between the actual output current and the maximum output current of the DC charging gun, as well as the relationship between the actual output current of the DC charging gun and the current corresponding to the power consumption of the high-voltage accessory. In one embodiment, the difference between the requested charging current and the actual output current of the DC charging gun is calculated based on the real-time charging information of the vehicle; in this application, to distinguish the difference, we can name this difference the first difference. Here, the requested charging current of the DC charging gun includes either the maximum output current of the DC charging gun or the current corresponding to the power consumption of the high-voltage accessory. When calculating the first difference, we first determine the minimum value between the maximum output current of the DC charging gun and the current corresponding to the power consumption of the high-voltage accessory; then we calculate the difference between this minimum value and the actual output current of the DC charging gun.

[0048] When calculating the first difference between the DC charging gun's requested charging current and the actual output current, the real-time vehicle charging information used includes: the DC charging gun's maximum output current, the DC charging gun's actual output current, the high-voltage battery's requested charging current, the actual DC-DC converter current, the compressor's actual current, and the PTC's actual current. First, the sum of the high-voltage battery's requested charging current, the actual DC-DC converter current, the compressor's actual current, and the PTC's actual current is calculated. Here, the compressor and PTC can achieve cooling and heating. The compressor is used for air conditioning cooling, compressing and transporting refrigerant vapor. The PTC is the air conditioner's heat source and can use an electrically heated element to quickly generate heat. The DC charging request current not only needs to meet the actual DC-DC converter current, the compressor's actual current, and the PTC's actual current, but also needs to meet the high-voltage battery's requested charging current to ensure normal charging. Therefore, the sum of the high-voltage battery's requested charging current, the actual DC-DC converter current, the compressor's actual current, and the PTC's actual current is calculated as the power consumption of the high-voltage accessory.

[0049] Then, determine the minimum value between the maximum output current of the DC charging gun and the power consumption of the high-voltage accessory calculated above. Calculate the difference between the minimum value and the actual output current of the DC charging gun to obtain the first difference between the charging request current and the actual output current of the DC charging gun. The first difference I_delta = min[IDCChrgMax(maximum output current of the DC charging gun), IBattChrgReq(current corresponding to the charging request of the high-voltage battery) + IDCAct(actual DC-DC current) + ICmpAct(actual compressor current) + IPtcAct(actual PTC current)] - IActDCChrg(actual output current of the DC charging gun).

[0050] Here, the minimum value between the maximum output current of the DC charging gun and the sum of the calculated currents is used, and the difference is made with the actual output current of the DC charging gun. This is because the accuracy of the maximum output current of the DC charging gun is relatively low. Directly using the difference between the maximum output current and the actual output current of the DC charging gun may lead to a large error. Generally, the maximum output current of the DC charging gun is larger than the sum of the calculated currents. Therefore, when we use the minimum value between the maximum output current of the DC charging gun and the sum of the calculated currents for the next step of the difference calculation, if the difference between the minimum value and the actual output current of the DC charging gun meets the first condition in step 103, then the difference between the larger value and the actual output current of the DC charging gun also meets the first condition. See the description in step 103 for details, and this can reduce the error.

[0051] The high-voltage battery charging status includes whether the high-voltage battery meets the charging current requirement, i.e., the difference between the actual charging current and the minimum charging current of the high-voltage battery, which can be referred to as the second difference. When calculating the second difference between the actual charging current and the minimum charging current of the high-voltage battery, the vehicle charging information used may include: the actual charging current of the high-voltage battery, the minimum temperature of the high-voltage battery, and the actual charge level of the high-voltage battery. Based on the minimum temperature and the actual charge level of the high-voltage battery, the minimum charging current of the high-voltage battery is determined; the difference between the actual charging current and the minimum charging current of the high-voltage battery is calculated to obtain the second difference. That is, I_DiffBatt = IBattAct (actual charging current of the high-voltage battery) – IbattCharMin (table based on TBattLo (minimum temperature of the high-voltage battery) and SocBattAct (actual charge level of the high-voltage battery)).

[0052] When determining the minimum charging current of the high-voltage battery based on its lowest temperature and actual charge level, the minimum charging current can be obtained by looking up a table based on a first preset table.

[0053] The first preset table is based on the lowest temperature of the high-voltage battery, the actual charge level of the high-voltage battery, and the minimum charging current of the high-voltage battery. In the prior art, high-voltage battery discharge may occur during DC charging. In this embodiment, by setting the minimum charging current of the high-voltage battery, the discharge of the high-voltage battery during DC charging can be avoided. At this time, the magnitude of the minimum charging current of the high-voltage battery only affects the driver's perception of the charging rate of the high-voltage battery. Therefore, we can set the minimum charging current that meets the driver's minimum demand for charging rate based on the lowest temperature and actual charge level of the high-voltage battery. For example, during the calibration of the first preset table, the minimum charging current corresponding to different SOCs of the high-voltage battery is set at a preset lowest temperature. At this lowest temperature, the minimum charging current corresponding to the minimum high-voltage battery SOC is the largest. For example, in the first preset table, the minimum charging current corresponding to the maximum high-voltage battery SOC at the highest temperature can be -8A. It should be noted that during DC charging, the sum of the high-voltage battery charging current and the current corresponding to the power consumption of the air conditioner is fixed. Therefore, this minimum charging current (e.g., -8A) cannot be greater than this fixed value. We also need to allocate a portion of the current to the air conditioner so that the air conditioner can heat the passenger compartment. Based on the minimum charging current corresponding to the minimum high-voltage battery SOC at a defined minimum temperature, the larger the SOC of the high-voltage battery, the smaller the set minimum charging current; conversely, the higher the temperature of the high-voltage battery, the smaller the set minimum charging current. To ensure that the high-voltage battery is in a charging state rather than a discharging state during DC charging, the minimum charging current corresponding to the maximum high-voltage battery SOC at a defined maximum temperature cannot be zero. For example, in the first preset table, the minimum charging current corresponding to the maximum high-voltage battery SOC at the maximum temperature can be -0.2A.

[0054] For example, if the lowest temperature of the high-voltage battery in the first preset table is -15℃ and the actual capacity of the high-voltage battery is 5mAh, then the minimum charging current of the high-voltage battery can be determined to be -8A; if the lowest temperature of the high-voltage battery is -13℃ and the actual capacity of the high-voltage battery is 10mAh, then the minimum charging current of the high-voltage battery can be determined to be -7A; if the lowest temperature of the high-voltage battery is 5℃ and the actual capacity of the high-voltage battery is 50mAh, then the minimum charging current of the high-voltage battery can be determined to be -3.5A; if the lowest temperature of the high-voltage battery is 10℃ and the actual capacity of the high-voltage battery is 95mAh, then the minimum charging current of the high-voltage battery can be determined to be -0.2A, and so on.

[0055] It should be noted that the charging current is represented by a negative value in this application. A negative value represents charging. For example, if the minimum charging current is 8A, it is represented by -8A. The above description of whether the charging current is large or small refers to whether the absolute value of the current is large or small.

[0056] After determining the minimum charging current of the high-voltage battery, the second difference between the actual charging current of the high-voltage battery and the minimum charging current is calculated. At this time, the charging current is still negative so that the maximum power limit of the air conditioner can be determined based on the second difference. By limiting the maximum power of the air conditioner, the current corresponding to the power of the air conditioner is smaller. This allows the charging current in the high-voltage battery to meet the requirements, solving the problem that in the existing technology, when the DC charging gun fails, it not only fails to charge the high-voltage battery, but may also cause the high-voltage battery to continue to discharge.

[0057] Step 103: Based on the charging status of the DC charging gun and the high-voltage battery, check whether the DC charging gun is abnormal.

[0058] Optionally, the DC charging gun can be checked for abnormality based on the first difference and the second difference.

[0059] Specifically, the test checks whether a first condition and a second condition are met. The first condition is whether a first difference is greater than a first current threshold, and the second condition is whether a second difference is greater than a second current threshold. For example, the first current threshold can be 3A, and the second current threshold can be -0.5A. The first condition is met when the first difference is greater than the first current threshold; the second condition is met when the second difference is greater than the second current threshold.

[0060] In this embodiment, we set two conditions. The first condition is to detect whether the DC charging gun meets the power consumption of the high-voltage accessory. Therefore, when making this judgment, we need to determine whether the current consumption of the high-voltage accessory can reach the maximum output current of the DC charging gun, and whether the actual output current of the DC charging gun meets the current consumption of the high-voltage accessory. Therefore, we calculate the first difference (I delta) as I delta = min[IDCChrgMax (maximum output current of DC charging gun), IBattChrgReq (high-voltage battery charging current request) + IDCAct (actual DC-DC current) + ICmpAct (actual compressor current) + IPtcAct (actual PTC current)] - IActDCChrg (actual output current of DC charging gun). When the first difference is greater than the first current threshold, it means that the actual output current of the DC charging gun cannot meet the power consumption of the high-voltage accessory, indicating that the DC charging gun is malfunctioning.

[0061] The second condition is to check whether the high-voltage battery meets its charging current requirements. That is, while the DC charging gun is not meeting the power consumption of the high-voltage accessories, it is determined whether the high-voltage battery meets the minimum charging current. The second condition is whether the second difference is greater than the second current threshold, i.e., whether the difference between the actual charging current of the high-voltage battery and the minimum charging current of the high-voltage battery is greater than the second current threshold. For example, when the second current threshold is -0.5, is the difference between the absolute value of the actual charging current of the high-voltage battery and the absolute value of the minimum charging current of the high-voltage battery less than 0.5? If so, the second condition is met. When the second condition is met, it means that there is a very small charging current in the high-voltage battery, or the high-voltage battery is in a discharging state. Obviously, the charging current in the high-voltage battery does not meet the requirements, and the DC charging gun may be faulty in this case.

[0062] Therefore, to determine whether the DC charging gun is malfunctioning, both the first and second conditions are set to be met, and the duration after both conditions are met is a preset time threshold. Further detection is then performed to check whether the duration after both conditions are met is greater than the preset time threshold. This preset time threshold can be set according to requirements, such as 30 seconds or 35 seconds; however, in this embodiment, the preset time threshold is not limited.

[0063] If both the first and second conditions are met, and the duration of each condition being met is greater than or equal to a preset time threshold, the DC charging gun is determined to be malfunctioning, and step 104 continues. If the first and / or second conditions are not met, or the duration of each condition being met is less than a preset time threshold, the DC charging gun is determined to be normal.

[0064] To time the duration after the first condition is met, and the duration after the second condition is met, we introduce hysteresis loops. The activation time of the hysteresis loop represents the duration after the corresponding condition is met. The state of the hysteresis loop is obtained through its input, which is a continuously changing value. For the first condition, when the first difference in the input gradually increases and exceeds the first current threshold, the first condition is met, and the hysteresis loop remains active. When the first difference in the input decreases and falls below the third current threshold, the hysteresis loop exits its active state. The third current threshold is less than the first current threshold. For example, if the first current threshold is set to 3A and the third current threshold is set to 0.5A, then when the first difference in the input hysteresis loop is greater than 3A, the hysteresis loop is active. When the first difference in the input hysteresis loop is less than 0.5A, the hysteresis loop exits. When the first difference in the input hysteresis loop is between 0.5A and 3A, the hysteresis loop maintains its current state. Without a hysteresis loop, we would need to track the duration for which the first difference is greater than the first current threshold. When the first difference is less than the first current threshold, the timer needs to be reset and restarted, which is cumbersome. Therefore, using a hysteresis loop can prevent fluctuations in the timing time from causing frequent advances and retreats. Similarly, for the hysteresis loop corresponding to the second condition, when the second difference in the input is greater than the second current threshold, the hysteresis loop is active. When the second difference is less than the fourth current threshold, the hysteresis loop exits. When the second difference is between the second and fourth current thresholds, the hysteresis loop maintains its current state. The fourth current threshold is less than the second current threshold, for example, the second current threshold is -0.5A and the fourth current threshold is -2A.

[0065] Step 104: When the DC charging gun malfunctions, determine the maximum power limit of the air conditioner based on the charging status of the high-voltage battery.

[0066] When an anomaly is detected in the DC charging gun, the maximum power limit of the air conditioner is determined based on a second difference. The second difference is the difference between the actual charging current and the minimum charging current of the high-voltage battery. In one embodiment, the maximum power limit of the air conditioner is obtained from a second preset table based on the second difference. The second preset table first provides the second difference and the corresponding maximum power limit of the air conditioner, and then engineers further optimize it based on the corresponding maximum power limit. During the optimization process, engineers can adjust the maximum power limit of the air conditioner so that even after limiting the air conditioner's power, the actual charging current in the high-voltage battery can still meet the user's needs. Since the charging current is represented by a negative value, the larger the second difference, the smaller the actual charging current in the high-voltage battery is compared to its minimum charging current, and the less it can guarantee the charging current requirements of the high-voltage battery. Therefore, the maximum power of the air conditioner also needs to be limited to a smaller and smaller value. For example, when the second difference in the second preset table is 0A, the maximum power limit of the air conditioner is 5.2W; when the second difference is 2A, the maximum power limit is 4W; when the second difference is 5A, the maximum power limit is 2.4W, and so on.

[0067] When a DC charging gun malfunction is detected, the second difference value is used as the current value, and an update is performed according to a preset update cycle. Since the input value of the hysteresis loop is constantly changing, its output value is also constantly changing, and the maximum power limit value of the air conditioner corresponding to the second difference value also varies. If there is no update for a long time, the maximum power limit value of the air conditioner corresponding to the updated second difference value will differ significantly from the maximum power limit value corresponding to the previous second difference value, easily causing jumps in the available power of the air conditioner. Therefore, we set a preset update cycle to ensure that the difference between the updated and previous maximum power limit values ​​is small, allowing the maximum power limit value to change smoothly and preventing power jumps caused by closed-loop regulation. Here, the preset update cycle can be 3 minutes. After the second difference value is updated, the maximum power limit value of the air conditioner is determined based on the updated second difference value.

[0068] When the DC charging gun is working properly, the maximum power limit of the air conditioner is determined to be the rated power of the air conditioner.

[0069] This invention, upon detecting a DC charging gun connection and receiving an air conditioning activation request, acquires real-time vehicle charging information. Based on this information, it determines the charging status of the DC charging gun and the high-voltage battery. According to these statuses, it checks whether the DC charging gun's actual output capacity reaches its maximum capacity, whether it can meet the current required for the high-voltage accessories' power consumption, and whether the high-voltage battery meets its charging current requirements. These checks are integrated to detect any abnormalities in the DC charging gun. If the DC charging gun malfunctions, and the high-voltage battery meets its charging current requirements, the maximum power of the air conditioning is limited. This prevents the air conditioning from distributing power according to normal requests, causing the high-voltage accessories' power consumption to exceed the DC charging gun's charging power, leading to continuous high-voltage battery discharge and ultimately causing a vehicle power failure. This invention allows for low-power heating or cooling of the air conditioning while ensuring high-voltage battery charging, meeting the user's basic needs.

[0070] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0071] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0072] Figure 2 A schematic diagram of the air conditioner power control device provided in an embodiment of the present invention is shown. For ease of explanation, only the parts related to the embodiment of the present invention are shown, and are described in detail below:

[0073] like Figure 2 As shown, the air conditioner power control device includes: an acquisition module 201, a determination module 202, and a detection module 203.

[0074] The acquisition module 201 is used to acquire real-time vehicle charging information when a DC charging gun connection is detected and an air conditioning turn-on request is received.

[0075] The determination module 202 is used to determine the charging status of the DC charging gun and the charging status of the high-voltage battery based on the real-time charging information of the vehicle. The charging status of the DC charging gun includes the relationship between the actual output current of the DC charging gun and the maximum output current, as well as the relationship between the actual output current of the DC charging gun and the current corresponding to the power consumption of the high-voltage accessory. The charging status of the high-voltage battery includes whether the high-voltage battery meets the charging current requirements.

[0076] The detection module 203 is used to detect whether the DC charging gun is abnormal based on the charging status of the DC charging gun and the charging status of the high-voltage battery.

[0077] The determining module 202 is also used to determine the maximum power limit value of the air conditioner based on the charging status of the high-voltage battery, assuming the high-voltage battery is charging normally, when the DC charging gun malfunctions.

[0078] In one possible implementation, when the determining module 202 determines the charging status of the DC charging gun based on the vehicle's real-time charging information, it is used for:

[0079] Based on the vehicle's real-time charging information, calculate the first difference between the DC charging gun's requested charging current and the actual output current.

[0080] In one possible implementation, the vehicle charging information includes: the maximum output current of the DC charging gun, the actual output current of the DC charging gun, the current corresponding to the charging request of the high-voltage battery, the actual current of the DC-DC converter, the actual current of the compressor, and the actual current of the PTC.

[0081] When determining the first difference between the DC charging gun's requested charging current and the actual output current based on the vehicle's real-time charging information, module 202 is used for:

[0082] Calculate the sum of the currents corresponding to the charging request of the high-voltage battery, the actual current of the DC-DC converter, the actual current of the compressor, and the actual current of the PTC.

[0083] Determine the minimum value between the maximum output current of the DC charging gun and the sum of the currents;

[0084] Calculate the difference between the minimum value and the actual output current of the DC charging gun to obtain the first difference between the charging request current and the actual output current of the DC charging gun.

[0085] In one possible implementation, when the determining module 202 determines the charging status of the high-voltage battery based on the vehicle's real-time charging information, it is used to:

[0086] Based on the vehicle's real-time charging information, calculate the second difference between the actual charging current and the minimum charging current of the high-voltage battery.

[0087] In one possible implementation, vehicle charging information includes: the actual charging current of the high-voltage battery, the minimum temperature of the high-voltage battery, and the actual charge of the high-voltage battery.

[0088] When calculating the second difference between the actual charging current and the minimum charging current of the high-voltage battery based on real-time vehicle charging information, it is used for:

[0089] The minimum charging current of the high-voltage battery is determined based on the lowest temperature and the actual charge of the high-voltage battery.

[0090] Calculate the difference between the actual charging current of the high-voltage battery and the minimum charging current of the high-voltage battery to obtain the second difference.

[0091] In one possible implementation, when the detection module 203 detects whether the DC charging gun is malfunctioning, it is used to:

[0092] The system detects whether both the first and second conditions are met, and whether the duration after the first and second conditions are met is greater than or equal to a preset time threshold. The first condition is that the first difference is greater than a first current threshold, the second condition is that the second difference is greater than a second current threshold, and the first current threshold is greater than the second current threshold.

[0093] In one possible implementation, when the DC charging gun malfunctions, the determining module 202, based on the high-voltage battery charging status, determines the maximum power limit of the air conditioner, and is used to:

[0094] When the DC charging gun malfunctions, the second difference is updated according to the preset update cycle, and the maximum power limit of the air conditioner is determined based on the updated second difference while meeting the charging current requirements of the high-voltage battery.

[0095] The aforementioned air conditioning power control device, upon detecting the DC charging gun connection and receiving an air conditioning start request, acquires the vehicle's real-time charging information via an acquisition module. Based on this information, a determination module determines the charging status of the DC charging gun and the high-voltage battery. According to these statuses, a detection module checks whether the DC charging gun's actual output capacity reaches its maximum, whether it can meet the current required for the high-voltage accessories' power consumption, and whether the high-voltage battery meets its charging current requirements. These detections are integrated to detect any abnormalities in the DC charging gun. If the DC charging gun malfunctions, and the high-voltage battery meets its charging current requirements, the determination module determines the maximum power limit for the air conditioning. This prevents the air conditioning power from being allocated according to normal requests, causing the high-voltage accessories to consume more power than the DC charging power, leading to continuous discharge of the high-voltage battery and ultimately causing a vehicle power failure. This invention allows for low-power heating or cooling of the air conditioning while ensuring normal charging of the high-voltage battery, meeting the user's basic needs.

[0096] This invention also provides a vehicle, which includes electronic equipment. Figure 3 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. For example... Figure 3 As shown, the terminal 3 in this embodiment includes: a processor 30, a memory 31, and a computer program 32 stored in the memory 31 and executable on the processor 30. When the processor 30 executes the computer program 32, it implements the steps in the various air conditioner power control method embodiments described above, for example... Figure 1 Steps 101 to 104 are shown. Alternatively, when the processor 30 executes the computer program 32, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 2 The functions of modules / units 201 to 203 are shown.

[0097] For example, the computer program 32 can be divided into one or more modules / units, which are stored in the memory 31 and executed by the processor 30 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 32 in the terminal 3. For example, the computer program 32 can be divided into... Figure 2 The modules / units shown are 201 to 203.

[0098] The terminal 3 may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art will understand that... Figure 3 This is merely an example of terminal 3 and does not constitute a limitation on terminal 3. It may include more or fewer components than shown, or combine certain components, or different components. For example, the terminal may also include input / output devices, network access devices, buses, etc.

[0099] The processor 30 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0100] The memory 31 can be an internal storage unit of the terminal 3, such as a hard disk or memory of the terminal 3. The memory 31 can also be an external storage device of the terminal 3, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the terminal 3. Furthermore, the memory 31 can include both internal storage units and external storage devices of the terminal 3. The memory 31 is used to store the computer program and other programs and data required by the terminal. The memory 31 can also be used to temporarily store data that has been output or will be output.

[0101] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0102] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0103] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0104] In the embodiments provided by this invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0105] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0106] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0107] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the above-described air conditioner power control method embodiments. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0108] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for controlling the power of an air conditioner, characterized in that, include: When a DC charging gun connection is detected and an air conditioning turn-on request is received, real-time vehicle charging information is obtained. Based on the real-time charging information of the vehicle, the charging status of the DC charging gun and the charging status of the high-voltage battery are determined; wherein, the charging status of the DC charging gun includes the relationship between the actual output current of the DC charging gun and the maximum output current, and the relationship between the actual output current of the DC charging gun and the current corresponding to the power consumption of the high-voltage accessory; the charging status of the high-voltage battery includes whether the high-voltage battery meets the charging current requirements. The step of determining the charging status of the DC charging gun based on the real-time charging information of the vehicle includes: calculating a first difference between the charging request current and the actual output current of the DC charging gun based on the real-time charging information of the vehicle. The vehicle's real-time charging information includes: the actual charging current of the high-voltage battery, the minimum temperature of the high-voltage battery, and the actual charge of the high-voltage battery. The step of determining the charging status of the high-voltage battery based on the real-time charging information of the vehicle includes: determining the minimum charging current of the high-voltage battery based on the lowest temperature of the high-voltage battery and the actual charge of the high-voltage battery; calculating the difference between the actual charging current of the high-voltage battery and the minimum charging current of the high-voltage battery to obtain a second difference; the minimum charging current refers to the minimum charging current requirement value set during DC charging to avoid the high-voltage battery from discharging. Based on the charging status of the DC charging gun and the charging status of the high-voltage battery, detect whether the DC charging gun is abnormal; When the DC charging gun malfunctions, the maximum power limit of the air conditioner is determined based on the charging status of the high-voltage battery.

2. The air conditioner power control method according to claim 1, characterized in that, The real-time charging information of the vehicle includes: the maximum output current of the DC charging gun, the actual output current of the DC charging gun, the current corresponding to the charging request of the high-voltage battery, the actual current of the DC-DC converter, the actual current of the compressor, and the actual current of the PTC. The step of calculating the first difference between the DC charging gun's requested charging current and the actual output current based on the vehicle's real-time charging information includes: Calculate the sum of the current corresponding to the charging request of the high-voltage battery, the actual current of the DC-DC converter, the actual current of the compressor, and the actual current of the PTC; Determine the minimum value between the maximum output current of the DC charging gun and the sum of the currents; Calculate the difference between the minimum value and the actual output current of the DC charging gun to obtain the first difference between the charging request current and the actual output current of the DC charging gun.

3. The air conditioner power control method according to claim 2, characterized in that, Checking for abnormalities in the DC charging gun includes: The system detects whether both the first and second conditions are met, and whether the duration after the first and second conditions are met is greater than or equal to a preset time threshold. The first condition is that the first difference is greater than a first current threshold, the second condition is that the second difference is greater than a second current threshold, and the first current threshold is greater than the second current threshold.

4. The air conditioner power control method according to claim 3, characterized in that, When the DC charging gun malfunctions, determining the maximum power limit of the air conditioner based on the charging status of the high-voltage battery includes: When the DC charging gun malfunctions, the second difference is updated according to the preset update cycle, and the maximum power limit of the air conditioner is determined based on the updated second difference while meeting the charging current requirements of the high-voltage battery.

5. A power control device for an air conditioner, characterized in that, include: The acquisition module is used to acquire real-time vehicle charging information when a DC charging gun connection is detected and an air conditioning turn-on request is received. The determination module is used to determine the charging status of the DC charging gun and the charging status of the high-voltage battery based on the real-time charging information of the vehicle. The charging status of the DC charging gun includes the relationship between the actual output current of the DC charging gun and the maximum output current, as well as the relationship between the actual output current of the DC charging gun and the current corresponding to the power consumption of the high-voltage accessory. The charging status of the high-voltage battery includes whether the high-voltage battery meets the charging current requirements. The vehicle's real-time charging information includes: the actual charging current of the high-voltage battery, the minimum temperature of the high-voltage battery, and the actual charge of the high-voltage battery. The determining module is used to calculate a first difference between the DC charging gun's requested charging current and the actual output current based on the vehicle's real-time charging information; and to determine the minimum charging current of the high-voltage battery based on the battery's lowest temperature and actual charge level; and to calculate a second difference between the actual charging current and the minimum charging current of the high-voltage battery; the minimum charging current refers to the minimum charging current requirement set during DC charging to prevent the high-voltage battery from discharging. The detection module is used to detect whether the DC charging gun is abnormal based on the charging status of the DC charging gun and the charging status of the high-voltage battery. The determining module is also used to determine the maximum power limit value of the air conditioner based on the charging status of the high-voltage battery when the DC charging gun is abnormal.

6. A vehicle comprising electronic equipment, the electronic equipment including a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program stored in the memory, characterized in that, When the processor executes the computer program, it implements the steps of the air conditioning power control method as described in any one of claims 1 to 4 above.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the air conditioning power control method as described in any one of claims 1 to 4 above.

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