Discharge control method, device, vehicle, storage medium and program product

Abstract

The application relates to a discharge control method and device, a vehicle, a storage medium and a program product. The method comprises the following steps: in response to an abnormal state of a battery in a vehicle, obtaining a vehicle state of the vehicle; performing a discharge strategy corresponding to the vehicle state on the battery; in the case that the vehicle reaches a preset power-off condition, stopping the discharge strategy and disconnecting the discharge of the battery; the discharge strategies corresponding to different vehicle states are different; the preset power-off condition comprises that the battery temperature is less than a preset temperature threshold and the vehicle state is a preset state; in the above method, in the case that the battery is abnormal, the power-off of the battery is not directly controlled, but the discharge strategy corresponding to the vehicle state is performed on the battery based on the vehicle state, and the discharge strategy is matched with the vehicle state, so that the flexibility of the discharge control is improved, and the reliability of the vehicle operation is simultaneously improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a discharge control method, apparatus, vehicle, storage medium, and program product. Background Technology

[0002] With the development of new energy technologies, new energy equipment is being used more and more. Taking new energy vehicles as an example, new energy vehicles use batteries as a power source to discharge electricity to the vehicle load, thereby meeting the power demand of the vehicle load.

[0003] In related technologies, batteries often experience thermal runaway during use due to various reasons. The usual solution is to directly disconnect the battery discharge to cut off its power output. However, the discharge control in these technologies is not flexible enough, reducing the reliability of vehicle operation. Summary of the Invention

[0004] Therefore, it is necessary to provide a discharge control method, device, vehicle, storage medium, and program product to address the aforementioned technical problems.

[0005] In a first aspect, embodiments of this application provide a discharge control method, the method comprising:

[0006] In response to abnormal battery conditions in the vehicle, obtain the vehicle status.

[0007] The battery is subjected to a discharge strategy corresponding to the vehicle state; different vehicle states correspond to different discharge strategies.

[0008] When the vehicle reaches the preset power-off conditions, the discharge strategy is stopped and the battery discharge is disconnected; the preset power-off conditions include the battery temperature being lower than the preset temperature threshold and the vehicle state being the preset state.

[0009] In this embodiment, in the event of a battery malfunction, the battery is not directly powered off. Instead, a discharge strategy corresponding to the vehicle state is executed on the battery based on the vehicle state, and the discharge strategy is matched with the vehicle state, which improves the flexibility of discharge control and simultaneously improves the reliability of vehicle operation.

[0010] In one embodiment, the discharge strategy includes using a target output power as the battery's output power; before executing the vehicle state-corresponding discharge strategy on the battery, the method further includes:

[0011] The target output power is determined based on the vehicle's condition.

[0012] In this embodiment, the target output power is determined based on the vehicle state, and a discharge strategy that uses the target output power as the battery output power is obtained and executed, so that the battery discharge output power matches the vehicle state, thereby improving the safety and reliability of vehicle operation.

[0013] In one embodiment, determining the target output power based on the vehicle state includes:

[0014] When the vehicle is in a driving state, the target output power is determined as the first output power; the first output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's electric drive system, temperature control system and low voltage power supply.

[0015] In this embodiment, when the vehicle is in a driving state, the determined first output power can simultaneously meet the power requirements of the electric drive system, temperature control system and low-voltage power supply in the vehicle. It can not only be used to cool down the battery in an abnormal state, but also maintain the current driving state of the vehicle, thereby improving the driving safety of the vehicle.

[0016] In one embodiment, determining the target output power based on the vehicle state includes:

[0017] When the vehicle is not in a driving state, the target output power is determined as the second output power; the second output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's temperature control system and low-voltage power supply.

[0018] In this embodiment, when the vehicle is not in a driving state, the determined second output power can simultaneously meet the power requirements of the vehicle's temperature control system and low-voltage power supply. This can not only be used to cool down the battery in an abnormal state, but also reduce the thermal impact of unnecessary loads on the battery in an abnormal state, thereby improving the battery's discharge safety.

[0019] In one embodiment, the discharge strategy includes using a target output power as the battery's output power; and executing a discharge strategy corresponding to the vehicle state on the battery, including:

[0020] The link between the battery and the vehicle load is established, and the battery outputs the target output power to discharge for the vehicle load.

[0021] In this embodiment, the battery discharge control of the vehicle load under abnormal conditions is realized, so that the battery discharges to the vehicle load at the target output power corresponding to the vehicle state, thereby improving the matching degree between the battery discharge output power and the vehicle state and thus improving the reliability of vehicle operation.

[0022] In one embodiment, establishing the link between the battery and the vehicle load includes:

[0023] Close the relay that connects the battery to the vehicle load.

[0024] In this embodiment, by closing the relay on the link between the battery and the vehicle load, the link between the battery and the vehicle load is turned on, thereby improving the switching efficiency of the link state and correspondingly improving the discharge control efficiency.

[0025] In one embodiment, controlling the battery to output a target output power includes:

[0026] Send a current adjustment command to the control device connected to the battery; the current adjustment command is used to instruct the control device to adjust the battery's discharge current so that the battery's output power reaches the target output power.

[0027] In this embodiment, by sending a current adjustment command to a control device connected to the battery, the control device is instructed to adjust the battery's discharge current so that the battery's output power reaches the target output power. This achieves quick control of the battery's output power, adapting to vehicle conditions and correspondingly improving discharge control efficiency.

[0028] In one embodiment, a discharge strategy corresponding to the vehicle state is executed on the battery, including:

[0029] If the vehicle's condition remains unchanged, continue to apply the current discharge strategy to the battery;

[0030] When the vehicle state changes, the discharge strategy corresponding to the changed vehicle state is applied to the battery.

[0031] In this embodiment, the discharge strategy for the battery is determined based on the actual changes in the vehicle's state, thus adapting to the actual changes in the vehicle's state and improving the flexibility of the discharge strategy adjustment.

[0032] In one embodiment, disconnecting the battery discharge includes:

[0033] Disconnect the relays that connect the battery to the vehicle load.

[0034] In this embodiment, by disconnecting the relay on the link between the battery and the vehicle load, the link between the battery and the vehicle load is disconnected, thereby disconnecting the battery discharge and improving the control efficiency of the discharge state, and correspondingly improving the discharge control efficiency.

[0035] In one embodiment, prior to an abnormal state of the battery in the vehicle, the method further includes:

[0036] Obtain the target characteristic parameters of the battery;

[0037] Determine the battery's temperature state based on the target characteristic parameters.

[0038] In this embodiment, the battery temperature status is monitored, and battery discharge control is performed in a timely manner when the battery temperature is abnormal, thereby improving the stability and reliability of vehicle operation.

[0039] In one embodiment, the method further includes:

[0040] When the battery temperature is normal, the discharge strategy corresponding to the normal state of the battery is executed in response to the normal state of the battery.

[0041] If the battery temperature condition is abnormal, perform the step of obtaining the vehicle status in response to the abnormal battery condition in the vehicle.

[0042] In this embodiment, different discharge strategies are executed on the battery based on whether the battery temperature state is normal or abnormal, so as to take into account different battery temperature states in actual applications, improve the matching degree between the discharge strategy and the battery temperature state, and thus improve the safety of discharge control.

[0043] Secondly, embodiments of this application also provide a discharge control device, which includes:

[0044] An anomaly response module is used to respond to abnormal states of the battery in the vehicle and obtain the vehicle's status.

[0045] The strategy execution module is used to execute the discharge strategy corresponding to the vehicle state for the battery; different vehicle states correspond to different discharge strategies.

[0046] The discharge disconnection module is used to stop executing the discharge strategy and disconnect the battery discharge when the vehicle reaches the preset power-off conditions; the preset power-off conditions include the battery temperature being lower than the preset temperature threshold and the vehicle state being a preset state.

[0047] Thirdly, embodiments of this application also provide a vehicle, including a battery, a domain controller, a control device, and a relay; the domain controller is connected to the battery through the control device and the relay; the domain controller is used to implement the steps in the discharge control method provided in any of the embodiments of the first aspect above.

[0048] Fourthly, embodiments of this application also provide a vehicle, including a battery, a vehicle controller, and a battery management system; the battery management system is used to acquire the battery status and determine a discharge strategy corresponding to the vehicle status based on the received vehicle status; different vehicle statuses correspond to different discharge strategies.

[0049] The vehicle controller is used to respond to abnormal battery conditions, obtain the vehicle status, receive the discharge strategy corresponding to the vehicle status, execute the discharge strategy corresponding to the vehicle status, and stop executing the discharge strategy and disconnect the battery discharge when the vehicle reaches a preset power-off condition. The preset power-off condition includes the battery temperature being lower than a preset temperature threshold and the vehicle status being a preset state.

[0050] Fifthly, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the discharge control method provided in any of the embodiments of the first aspect described above.

[0051] In a sixth aspect, embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the steps in the discharge control method provided in any of the embodiments of the first aspect described above.

[0052] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0053] Figure 1 This is a structural block diagram of a vehicle in one embodiment;

[0054] Figure 2 This is a flowchart illustrating a discharge control method in one embodiment;

[0055] Figure 3 This is a flowchart illustrating the process of adjusting the discharge strategy in one embodiment;

[0056] Figure 4 This is a flowchart illustrating the process of determining the temperature state of a battery in one embodiment;

[0057] Figure 5 This is a flowchart illustrating the discharge control method in another embodiment;

[0058] Figure 6 This is a flowchart illustrating the discharge control method in another embodiment;

[0059] Figure 7 This is a structural block diagram of the discharge control device in one embodiment;

[0060] Figure 8 This is a structural block diagram of the vehicle in another embodiment.

[0061] Explanation of reference numerals in the attached figures:

[0062] 100 — Vehicles;

[0063] 101 — Battery;

[0064] 102 — Domain Controller;

[0065] 103 — Control device;

[0066] 104—Relay;

[0067] 105—Vehicle controller;

[0068] 106 — Battery Management System. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the term "comprising" and any variations thereof in the specification, claims and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0071] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), unless otherwise explicitly specified.

[0073] With the development of new energy technologies, new energy equipment is being used more and more. Taking new energy vehicles as an example, new energy vehicles use batteries as a power source to discharge electricity to the vehicle load, thereby meeting the power demand of the vehicle load.

[0074] During use, batteries often experience thermal runaway due to various reasons such as overcharging, over-discharging, and mechanical impacts, causing the internal temperature to rise continuously. In severe cases, this can lead to safety accidents such as fires or explosions. To address this, relevant technologies typically disconnect the relay connected between the battery and the vehicle load to stop the battery from discharging to the vehicle load, thereby cutting off the battery's power output.

[0075] However, in real-world applications, batteries may experience thermal runaway in any vehicle condition. If thermal runaway occurs while the vehicle is in motion, the relevant technology will forcibly disconnect the battery to discharge, causing the vehicle to suddenly lose power and creating safety issues. This is especially true in high-speed driving scenarios, where it can lead to even more serious safety problems.

[0076] Therefore, the discharge control in related technologies is not flexible enough in response to abnormal battery conditions, which reduces the reliability of vehicle operation.

[0077] Based on this, this application provides a discharge control method. In the event of a battery malfunction, the method acquires the vehicle status of the vehicle where the battery is located, executes a discharge strategy corresponding to the vehicle status, and adjusts the discharge strategy to adapt to changes in the vehicle status. This makes the discharge strategy match the vehicle status, improves the flexibility of discharge control, and simultaneously improves the reliability of vehicle operation.

[0078] The discharge control method provided in this application embodiment can be applied to vehicles. Therefore, before describing the process of the discharge control method in detail, the vehicle provided in this application embodiment will be described first.

[0079] like Figure 1 As shown, in one embodiment, this application provides a vehicle 100, including: a battery 101, a domain controller 102, a control device 103, and a relay 104.

[0080] The domain controller 102 is connected to the battery 101 via the control device 103 and the relay 104.

[0081] The following is a detailed explanation of each part of vehicle 100:

[0082] Battery 101 is the power source in vehicle 100 and can be used to discharge to vehicle loads, enabling battery 101 to supply power to vehicle loads. For example, vehicle loads include the vehicle's electric drive system, temperature control system, or lighting system, etc.

[0083] In practical applications, the battery 101 can be a single battery cell or multiple battery cells forming a battery pack. This embodiment does not impose specific limitations on the form of the battery 101.

[0084] Domain controller 102 is the control center in vehicle 100. It can integrate the functions of battery management system (BMS) and vehicle controller to monitor and manage battery 101 and realize the discharge control of battery 101 on vehicle load.

[0085] For example, the domain controller 102 can acquire temperature data of the battery 101, determine the battery temperature status based on the temperature data of the battery 101, and issue an abnormal alarm in the event of abnormal battery temperature (such as thermal runaway). It can also acquire vehicle status and control battery discharge based on vehicle status.

[0086] The control device 103 is connected to both the domain controller 102 and the battery 101, and is used to adjust the output power of the battery 101 under the control of the domain controller 102. For example, the control device 103 can receive adjustment commands issued by the domain controller 102, and in response to the adjustment commands, limit the current of the battery 101 to control the output power of the battery 101. The control device 103 is integrated from a chip and power semiconductor.

[0087] Relay 104 is a switching unit connecting battery 101 and vehicle load, used to adjust the state of the link between battery 101 and vehicle load under the control of domain controller 102. For example, relay 104 can disconnect the link between battery 101 and vehicle load upon receiving a disconnect command from domain controller 102; and connect the link between battery 101 and vehicle load upon receiving a connect command from domain controller 102.

[0088] Those skilled in the art will understand that Figure 1 The structures shown are merely block diagrams of some structures related to the embodiments of this application and do not constitute a limitation on the computer devices on which the embodiments of this application are applied. Specific computer devices may include more or fewer components than those shown in the figures, or combine certain components, or have different component arrangements.

[0089] The following details the discharge control method provided in the embodiments of this application, and applies it to... Figure 1 Taking the domain controller in the example, in one embodiment, such as Figure 2 As shown, the provided discharge control method includes the following steps:

[0090] S210, In response to an abnormal state of the battery in the vehicle, obtain the vehicle status.

[0091] In this context, abnormal battery states characterize abnormal battery parameters, such as abnormal temperature (e.g., thermal runaway), abnormal current, or abnormal voltage. Vehicle states characterize the overall operating status of the vehicle. For example, vehicle states may include driving state, parking state, or charging state.

[0092] Optionally, the domain controller can monitor the battery status of the vehicle's battery, and if the battery is in an abnormal state, it can obtain the vehicle's status and output a battery abnormality warning simultaneously.

[0093] S220, Execute the discharge strategy corresponding to the vehicle state for the battery; different vehicle states correspond to different discharge strategies.

[0094] Here, the discharge strategy refers to the battery's discharge strategy for the vehicle load. For example, the discharge strategy may include battery operating parameters, such as discharge current or output power.

[0095] Optionally, after obtaining the vehicle status, the domain controller can read the pre-stored correspondence between the vehicle status and the discharge strategy, determine the discharge strategy corresponding to the vehicle status, and execute the discharge strategy corresponding to the vehicle status on the battery.

[0096] For example, the correspondence between vehicle state and discharge strategy can be represented by a correspondence table, and the domain controller can determine the discharge strategy corresponding to the vehicle state by looking up the table.

[0097] When the discharge strategy includes the battery's operating parameters, executing the discharge strategy corresponding to the vehicle state on the battery means that the domain controller controls the battery to discharge the vehicle load with the operating parameters as the output target.

[0098] S230. When the vehicle reaches the preset power-off condition, stop executing the discharge strategy and disconnect the battery discharge; the preset power-off condition includes the battery temperature being lower than the preset temperature threshold and the vehicle state being the preset state.

[0099] The preset power-off condition is the condition for disconnecting the battery discharge. For example, the preset power-off condition may include conditions related to the battery in the vehicle, such as the battery being in an abnormal state for a preset duration, or the abnormality level being lower than a preset level, or conditions related to the vehicle itself, such as the vehicle starting time reaching a preset duration, the mileage reaching a preset mileage, etc.

[0100] It should be noted that in practical applications, the vehicle status will change based on user actions. The domain controller can periodically obtain the vehicle status, and it can also obtain the changed vehicle status when the vehicle status changes.

[0101] Optionally, the domain controller can monitor vehicle information to determine whether the vehicle has reached the preset power-off condition based on parameters related to the preset power-off condition in the vehicle information. If the vehicle reaches the preset power-off condition, the domain controller will stop executing the discharge strategy and disconnect the battery discharge. For example, the domain controller can periodically acquire the vehicle's battery temperature and vehicle status to determine that the vehicle has reached the preset power-off condition when the battery temperature is below a preset temperature threshold and the vehicle status reaches a preset state, thereby stopping the discharge strategy and disconnecting the battery discharge. For example, the preset state includes a non-driving state, such as a parked state.

[0102] Accordingly, if the battery temperature is greater than or equal to a preset temperature threshold, or if the vehicle state has not reached a preset state, the domain controller will continue to execute the steps of implementing the discharge strategy corresponding to the vehicle state for the battery.

[0103] Specifically, a battery temperature below a preset temperature threshold and a vehicle status within a preset state indicate that both the battery temperature and the vehicle status are within a safe range. Using a battery temperature below the preset temperature threshold and a vehicle status within the preset state as the preset power-off condition ensures that discharge is interrupted when both the battery and the vehicle are safe, thereby reducing the safety impact of power outages on both the battery and the vehicle and improving power-off safety.

[0104] In this embodiment, the vehicle state is obtained in response to an abnormal state of the battery in the vehicle. A discharge strategy corresponding to the vehicle state is then executed on the battery. If the vehicle reaches a preset power-off condition, the discharge strategy is stopped, and the battery discharge is disconnected. Different vehicle states correspond to different discharge strategies. The preset power-off condition includes a battery temperature below a preset temperature threshold and the vehicle state being a preset state. In the above method, in the event of a battery abnormality, the battery is not directly powered off. Instead, a discharge strategy corresponding to the vehicle state is executed on the battery based on the vehicle state, ensuring that the discharge strategy matches the vehicle state. This improves the flexibility of discharge control and simultaneously enhances the reliability of vehicle operation.

[0105] The discharge strategy includes using the target output power as the battery's output power. Based on this, in one embodiment, before executing the vehicle state-corresponding discharge strategy on the battery in S220, the method further includes:

[0106] The target output power is determined based on the vehicle's condition.

[0107] Optionally, before executing the vehicle-specific discharge strategy on the battery, the domain controller may first determine the target output power of the battery based on the vehicle state to obtain a discharge strategy that uses the target output power as the battery's output power, and use it as the discharge strategy corresponding to the vehicle state.

[0108] For example, a state power mapping table is pre-configured in the domain controller. After obtaining the vehicle state, the domain controller looks up the output power corresponding to the vehicle state in the state power mapping table as the target output power. For example, when the vehicle state is parked, the target output power is determined to be P1 based on the state power mapping table; when the vehicle state is driving, the target output power is determined to be P2 based on the state power mapping table.

[0109] In this embodiment, the discharge strategy includes using a target output power as the battery's output power. Before executing the discharge strategy corresponding to the vehicle state, the target output power is determined based on the vehicle state. In the above method, the target output power is determined based on the vehicle state, and a discharge strategy using the target output power as the battery's output power is obtained and executed, so that the battery's discharge output power matches the vehicle state, thereby improving the safety and reliability of vehicle operation.

[0110] In one embodiment, when the vehicle is in a driving state, determining the target output power based on the vehicle state includes:

[0111] When the vehicle is in a driving state, the target output power is determined as the first output power; the first output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's electric drive system, temperature control system and low voltage power supply.

[0112] The vehicle's electric drive system propels the vehicle and maintains its driving status. The low-voltage power source is a small battery within the vehicle, which powers a water pump to cool the battery. The temperature control system (such as an air conditioning system) cools the coolant in the water pump, improving the cooling effect on the battery.

[0113] It should be noted that when the battery is in an abnormal state, it needs to discharge to the vehicle's temperature control system and low-voltage power supply, allowing these systems to activate under the control of the vehicle controller to cool the battery. When the vehicle is in motion, the battery needs to discharge to the vehicle's electric drive system to maintain vehicle operation. Therefore, when the battery is in an abnormal state and the vehicle is in motion, the battery must provide sufficient output power to discharge to the vehicle's electric drive system, temperature control system, and low-voltage power supply.

[0114] Optionally, when the vehicle is in a driving state, the domain controller can use the electric drive system, temperature control system and low-voltage power supply discharge in the vehicle as target loads, and obtain the sum of the required power of the target loads as the first output power for the corresponding driving state.

[0115] For example, in order to meet the acoustic, optical, and electronic requirements of the vehicle in motion, the target load of the vehicle in motion may also include acoustic, optical, and electronic equipment in the vehicle, such as horns and headlights, and the first output power is the sum of the required power of the electric drive system, the temperature control system, the low-voltage power supply, and the acoustic, optical, and electronic equipment.

[0116] In this embodiment, when the vehicle is in a driving state, the target output power is determined as a first output power; the first output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's electric drive system, temperature control system, and low-voltage power supply. In the above method, when the vehicle is in a driving state, the determined first output power can simultaneously meet the power requirements of the electric drive system, temperature control system, and low-voltage power supply in the vehicle. This can not only be used to cool the battery in an abnormal state but also maintain the vehicle's current driving state, thereby improving vehicle driving safety.

[0117] In one embodiment, when the vehicle is not in a driving state, determining the target output power based on the vehicle state includes:

[0118] When the vehicle is not in a driving state, the target output power is determined as the second output power; the second output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's temperature control system and low-voltage power supply.

[0119] The non-driving state can be either a parked state or a charging state.

[0120] It should be noted that when the battery is in an abnormal state, it needs to discharge to the vehicle's temperature control system and low-voltage power supply, allowing these systems to activate under the control of the domain controller to cool the battery due to the abnormal temperature. When the vehicle is parked, the battery needs to discharge to the vehicle's electric drive system to maintain the vehicle's driving state. However, when the vehicle is not parked, the battery does not need to discharge to the electric drive system. Therefore, when the battery is in an abnormal state and the vehicle is not in motion, the battery only needs to provide enough output power to discharge to the vehicle's temperature control system and low-voltage power supply.

[0121] Optionally, when the vehicle is in a non-driving state, the domain controller can use the vehicle's temperature control system and low-voltage power supply discharge as target loads, and obtain the sum of the required power of the target loads as the second output power for the corresponding non-driving state.

[0122] For example, in order to meet the acoustic, optical, and electronic requirements of the vehicle in a non-driving state, the target load of the vehicle in a driving state may also include the acoustic, optical, and electronic equipment in the vehicle, such as horns and headlights, and the second output power is the sum of the required power of the temperature control system, the low-voltage power supply and the acoustic, optical, and electronic equipment.

[0123] To improve battery power safety, when the vehicle is in a charging state, the domain controller can disconnect the link between the battery and the external power source, and can also output an alarm message indicating abnormal static charging of the battery, thereby reducing the thermal impact of the charging process on the abnormal battery and improving battery power safety.

[0124] In this embodiment, when the vehicle is not in a driving state, the target output power is determined as a second output power; the second output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's temperature control system and low-voltage power supply. In the above method, when the vehicle is not in a driving state, the determined second output power can simultaneously meet the power requirements of the vehicle's temperature control system and low-voltage power supply. This can not only be used to cool the battery in an abnormal state, but also reduce the thermal impact of unnecessary loads on the battery in an abnormal state, thereby improving the battery's discharge safety.

[0125] In one embodiment, where the discharge strategy includes using the target output power as the battery's output power, the discharge strategy corresponding to the vehicle state implemented in S220 above includes:

[0126] The link between the battery and the vehicle load is established, and the battery outputs the target output power to discharge for the vehicle load.

[0127] Optionally, after obtaining the discharge strategy corresponding to the vehicle state, the domain controller can connect the link between the battery and the vehicle load, and control the battery to output the target output power corresponding to the vehicle state, so as to discharge the vehicle load.

[0128] In this embodiment, the battery discharges to the vehicle load by establishing a connection between the battery and the vehicle load. This method enables battery discharge control to the vehicle load under abnormal conditions, allowing the battery to discharge to the vehicle load at the target output power corresponding to the vehicle state. This improves the matching degree between the battery's discharge output power and the vehicle state, thereby enhancing the reliability of vehicle operation.

[0129] A relay is connected to the link between the battery and the vehicle load. In one embodiment, establishing the link between the battery and the vehicle load includes:

[0130] A relay on the link between the closed battery and the vehicle load.

[0131] The relay is a switching unit connected to the link between the battery and the vehicle load. It can receive switching control commands from the domain controller to control the relay to change the state of the link between the battery and the vehicle load. For example, the relay can close upon receiving a conduction command to conduct the link between the battery and the vehicle load; correspondingly, the relay can open upon receiving a disconnection command to conduct the link between the battery and the vehicle load.

[0132] Optionally, when it is necessary to establish a link between the battery and the vehicle load, the domain controller can send a closing command to the relay to establish the link between the battery and the vehicle load.

[0133] In this embodiment, by closing the relay on the link between the battery and the vehicle load, the link between the battery and the vehicle load is turned on, thereby improving the switching efficiency of the link state and correspondingly improving the discharge control efficiency.

[0134] The battery is also connected to a control device for controlling the battery's output power. In one embodiment, controlling the battery to output a target power includes:

[0135] Send a current adjustment command to the control device connected to the battery; the current adjustment command is used to instruct the control device to adjust the battery's discharge current so that the battery's output power reaches the target output power.

[0136] The control device can adjust the battery's output power by adjusting the battery's output current.

[0137] Optionally, the domain controller can generate a current adjustment command carrying the target current corresponding to the target output power based on the target output power, and send the current adjustment command to the control device to instruct the control device to adjust the battery discharge current to reach the target current, thereby making the battery output power reach the target output power.

[0138] In this embodiment, by sending a current adjustment command to a control device connected to the battery, the control device is instructed to adjust the battery's discharge current so that the battery's output power reaches the target output power. This achieves quick control of the battery's output power, adapting to vehicle conditions and correspondingly improving discharge control efficiency.

[0139] In practical applications, it is also necessary to adjust the battery discharge strategy when the vehicle's condition changes. Based on this, in one embodiment, such as... Figure 3 As shown, the discharge strategy for the battery corresponding to the vehicle state in S220 above includes:

[0140] S310. If the vehicle status remains unchanged, continue to perform the current discharge strategy on the battery.

[0141] Optionally, the domain controller can monitor the vehicle status to continue the current discharge strategy applied to the battery if the vehicle status does not change.

[0142] For example, the domain controller can periodically obtain the vehicle status. If the vehicle status obtained in the previous acquisition was a parked state, and the vehicle status obtained in the current acquisition is also a parked state, that is, if the vehicle status has not changed, the current discharge strategy, that is, the discharge strategy corresponding to the parked state, will continue to be executed on the battery.

[0143] S320. When the vehicle state changes, execute the discharge strategy corresponding to the changed vehicle state for the battery.

[0144] Optionally, the domain controller can monitor the vehicle status to determine the discharge strategy corresponding to the changed vehicle status when the vehicle status changes, and then execute the discharge strategy corresponding to the changed vehicle status on the battery.

[0145] For example, the domain controller can periodically acquire the vehicle status. If the vehicle status acquired previously was a parked state and the vehicle status acquired this time is a driving state, that is, when the vehicle status changes, the discharge strategy corresponding to the changed vehicle status is executed on the battery, that is, the discharge strategy corresponding to the driving state is executed on the battery.

[0146] It should be noted that the domain controller can cyclically adjust and execute the discharge strategy corresponding to the vehicle state based on changes in the vehicle state. For example, when the vehicle state is driving, the domain controller executes the discharge strategy corresponding to the driving state on the battery. When the vehicle state changes to parking, the domain controller adjusts the discharge strategy corresponding to the driving state to the discharge strategy corresponding to the parking state, and executes the adjusted discharge strategy (i.e., the discharge strategy corresponding to the parking state) on the battery.

[0147] In this embodiment, when the vehicle state remains unchanged, the current discharge strategy for the battery is maintained; when the vehicle state changes, the discharge strategy corresponding to the changed vehicle state is applied to the battery. In this method, determining whether to maintain or adjust the discharge strategy for the battery based on the actual changes in the vehicle state improves the flexibility of discharge strategy adjustment.

[0148] A relay is connected to the link between the battery and the vehicle load. In one embodiment, disconnecting the battery discharge in S230 above includes:

[0149] Disconnect the relays that connect the battery to the vehicle load.

[0150] Optionally, when it is necessary to disconnect the battery from discharging, the domain controller can send a disconnect command to the relay to disconnect the link between the battery and the vehicle load, thereby disconnecting the battery from discharging the vehicle load.

[0151] In this embodiment, by disconnecting the relay on the link between the battery and the vehicle load, the link between the battery and the vehicle load is disconnected, thereby disconnecting the battery discharge and improving the control efficiency of the discharge state, and correspondingly improving the discharge control efficiency.

[0152] The above-described discharge control method further includes determining the temperature state of the battery. Based on this, in one embodiment, such as... Figure 4 As shown, prior to responding to an abnormal state of the battery in the vehicle in S210, the method further includes:

[0153] S410: Obtain the target characteristic parameters of the battery.

[0154] The target characteristic parameters of a battery can be used to characterize its temperature state. For example, the target characteristic parameters of a battery include voltage, current, or temperature. The temperature state of a battery includes normal and abnormal states.

[0155] Optionally, the domain controller can directly read target characteristic parameters of the battery, such as temperature.

[0156] S420. Determine the battery's temperature state based on the target characteristic parameters.

[0157] Optionally, after obtaining the target characteristic parameters of the battery, the domain controller can match the target characteristic parameters of the battery with the parameter conditions corresponding to different temperature states to determine the temperature state of the battery.

[0158] For example, taking temperature as the target characteristic parameter, the parameter conditions corresponding to an abnormal temperature state include the battery temperature being greater than a preset temperature threshold, and the parameter conditions corresponding to a normal temperature state include the battery temperature being less than or equal to the preset temperature threshold. In the case where the obtained battery temperature is greater than the preset temperature threshold, the battery temperature state is determined to be abnormal; conversely, in the case where the obtained battery temperature is less than or equal to the preset temperature threshold, the battery temperature state is determined to be normal.

[0159] In this embodiment, before responding to an abnormal state of the battery in the vehicle, target characteristic parameters of the battery are acquired to determine the battery's temperature state based on these parameters. This method enables monitoring of the battery's temperature state and timely battery discharge control in case of abnormal battery temperature, thereby improving the stability and reliability of vehicle operation.

[0160] The battery's temperature state may be normal or abnormal. In one embodiment, such as... Figure 5 As shown, the above method also includes:

[0161] S510: When the battery temperature is in a normal state, in response to the normal state of the battery, execute the discharge strategy corresponding to the normal state of the battery.

[0162] The discharge strategy implemented by the battery under normal conditions is different from the discharge strategy implemented by the battery under abnormal conditions.

[0163] Optionally, the domain controller pre-stores two sets of discharge strategies, one corresponding to the normal state and the other to the abnormal state. After obtaining the battery's temperature state, the domain controller can, in response to the battery's normal state, obtain the discharge strategy corresponding to the normal state and execute it.

[0164] For example, the discharge strategy corresponding to the normal state includes using a reference output power as the battery's output power, which is either the battery's maximum output power or the sum of the power required by all vehicle loads in the vehicle.

[0165] S520. If the battery temperature condition is abnormal, perform the step of obtaining the vehicle status in response to the abnormal state of the battery in the vehicle.

[0166] Optionally, after obtaining the battery temperature state, the domain controller may, in response to the abnormal battery temperature state, obtain the discharge strategy corresponding to the abnormal battery state and execute the discharge strategy corresponding to the abnormal battery state. Specifically, it may execute step S210, which is to obtain the vehicle state in response to the abnormal battery state in the vehicle, and execute S220 and S230 accordingly.

[0167] In this embodiment, when the battery temperature is normal, a discharge strategy corresponding to the normal battery state is executed; when the battery temperature is abnormal, a step of obtaining the vehicle state in response to the abnormal battery state in the vehicle is executed. In the above method, different discharge strategies are executed based on whether the battery temperature is normal or abnormal, to take into account different battery temperature states in practical applications, improve the matching degree between the discharge strategy and the battery temperature state, and thus improve the safety of discharge control.

[0168] To facilitate understanding by those skilled in the art, the discharge control method provided in this application is described in detail below, such as... Figure 6As shown, the method may include:

[0169] S601. Determine the temperature state of the battery based on the target characteristic parameters of the battery in the vehicle.

[0170] S602. When the battery temperature is in a normal state, in response to the normal state of the battery, execute the discharge strategy corresponding to the normal state of the battery.

[0171] S603. When the battery temperature is abnormal, obtain the vehicle status.

[0172] S604. Determine the target output power based on the vehicle status and generate a discharge strategy that uses the target output power as the battery output power; the target output power is the sum of the power required by the target load in the vehicle; when the vehicle is in a driving state, the target load includes the vehicle's electric drive system, temperature control system, and low-voltage power supply; when the vehicle is not in a driving state, the target load includes the temperature control system and low-voltage power supply.

[0173] S605, A relay that closes the link between the battery and the vehicle load;

[0174] S606. Send a current adjustment command to the control device connected to the battery; the current adjustment command is used to instruct the control device to adjust the battery's discharge current so that the battery's output power reaches the target output power.

[0175] S607. Control the battery to discharge to the vehicle load based on the target output power, so as to implement the discharge strategy corresponding to the vehicle state for the battery.

[0176] S608. If the vehicle status remains unchanged, continue to apply the current discharge strategy to the battery;

[0177] S609. When the vehicle state changes, the discharge strategy corresponding to the changed vehicle state is executed on the battery.

[0178] S610. When the battery temperature is lower than the preset temperature threshold and the vehicle status is the preset status, stop executing the discharge strategy and disconnect the battery discharge.

[0179] It should be noted that the descriptions in S601-S610 above can be found in the relevant descriptions in the above embodiments, and their effects are similar, so they will not be repeated here.

[0180] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0181] In one embodiment, such as Figure 7 As shown, a discharge control device is provided, including: an abnormal response module 701, a strategy execution module 702, and a discharge disconnection module 703; wherein:

[0182] The anomaly response module 701 is used to respond to an abnormal state of the battery in the vehicle and obtain the vehicle status.

[0183] The strategy execution module 702 is used to execute the discharge strategy corresponding to the vehicle state for the battery; different vehicle states correspond to different discharge strategies;

[0184] The discharge disconnect module 703 is used to stop executing the discharge strategy and disconnect the battery discharge when the vehicle reaches the preset power-off conditions; the preset power-off conditions include the battery temperature being lower than the preset temperature threshold and the vehicle state being a preset state.

[0185] Each module in the aforementioned battery discharge control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0186] In one embodiment, such as Figure 1 As shown, a vehicle 100 is provided, including: a battery 101, a domain controller 102, a control device 103, and a relay 104.

[0187] The domain controller 102 is connected to the battery 101 via the control device 103 and the relay 104 to implement the steps of any of the above methods.

[0188] Apart from Figure 1 The vehicle shown in the application also provides a vehicle for implementing the discharge control method, in one embodiment, such as Figure 8As shown, the vehicle 100 includes a battery 101, a vehicle controller 105, and a battery management system 106.

[0189] The battery management system 106 is used to acquire the battery status and determine the discharge strategy corresponding to the vehicle status based on the received vehicle status; different vehicle statuses correspond to different discharge strategies; the vehicle controller 105 is used to respond to the abnormal status of the battery 101, acquire the vehicle status of the vehicle 100, receive the discharge strategy corresponding to the vehicle status, execute the discharge strategy corresponding to the vehicle status on the battery 101, and stop executing the discharge strategy and disconnect the discharge of the battery 101 when the vehicle 100 reaches the preset power-off condition; the preset power-off condition includes the battery temperature being lower than the preset temperature threshold and the vehicle status being the preset state.

[0190] The battery management system 106 can monitor the temperature status of the battery 101 and send abnormal status information to the vehicle controller 105 when the temperature status of the battery 101 is abnormal.

[0191] When the vehicle controller 105 receives abnormal status information sent by the battery management system 106, it obtains the vehicle status and feeds back the vehicle status to the battery management system 106.

[0192] The battery management system 106 obtains the discharge strategy corresponding to the vehicle state and sends the discharge strategy corresponding to the vehicle state to the vehicle controller 105. The vehicle controller 105 executes the discharge strategy corresponding to the vehicle state on the battery 101, and stops executing the discharge strategy and disconnects the discharge of the battery 101 when the vehicle 100 reaches the preset power-off condition.

[0193] In one embodiment, the battery management system 106 obtains a discharge strategy corresponding to the vehicle state, including:

[0194] Determine the target output power based on the vehicle's condition;

[0195] Generate a discharge strategy that uses the target output power as the battery's output power.

[0196] In one embodiment, determining the target output power based on the vehicle state includes:

[0197] When the vehicle is in a driving state, the target output power is determined as the first output power; the first output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's electric drive system, temperature control system and low voltage power supply.

[0198] In one embodiment, determining the target output power based on the vehicle state includes:

[0199] When the vehicle is not in a driving state, the target output power is determined as the second output power; the second output power is the sum of the power required by the target load in the vehicle; the target load includes the vehicle's temperature control system and low-voltage power supply.

[0200] In one embodiment, the discharge strategy includes using a target output power as the battery's output power; the vehicle controller 105 executes a discharge strategy corresponding to the vehicle state on the battery 101, including:

[0201] The link between the battery and the vehicle load is established, and the battery outputs the target output power to discharge for the vehicle load.

[0202] In one embodiment, establishing the link between the battery and the vehicle load includes:

[0203] Close the relay that connects the battery to the vehicle load.

[0204] In one embodiment, controlling the battery to output a target output power includes:

[0205] Send a current adjustment command to the control device connected to the battery; the current adjustment command is used to instruct the control device to adjust the battery's discharge current so that the battery's output power reaches the target output power.

[0206] In one embodiment, the vehicle controller 105 executes a discharge strategy corresponding to the vehicle state on the battery 101, including:

[0207] If the vehicle's condition remains unchanged, continue to apply the current discharge strategy to the battery;

[0208] When the vehicle state changes, the discharge strategy corresponding to the changed vehicle state is applied to the battery.

[0209] In one embodiment, disconnecting the discharge of battery 101 includes:

[0210] Disconnect the relays that connect the battery to the vehicle load.

[0211] In one embodiment, the battery management system 106 is further configured to:

[0212] Obtain the target characteristic parameters of the battery;

[0213] Determine the battery's temperature state based on the target characteristic parameters.

[0214] In one embodiment, the battery management system 106 is further configured to:

[0215] When the battery temperature is normal, the discharge strategy corresponding to the normal state is obtained and fed back to the vehicle controller; the vehicle controller is used to execute the discharge strategy corresponding to the normal state on the battery.

[0216] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above-described discharge control methods.

[0217] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of any of the above-described discharge control methods.

[0218] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0219] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0220] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A discharge control method, characterized in that, The method includes: In response to an abnormal state of the battery in the vehicle, the vehicle status is obtained; The target output power is determined based on the vehicle state, and a discharge strategy is obtained that uses the target output power as the battery's output power to the vehicle load. The battery is then controlled to discharge to the vehicle load according to the discharge strategy. Different vehicle states correspond to different discharge strategies. The vehicle state is used to characterize the overall vehicle operating state. Different vehicle states correspond to different target output powers. When the vehicle reaches a preset power-off condition, the discharge strategy is stopped and the battery discharge is disconnected to cut off the battery's power output to the vehicle; the preset power-off condition includes reaching a preset mileage. Determining the target output power based on the vehicle status includes: When the vehicle is in a driving state, the electric drive system, temperature control system and low-voltage power supply in the vehicle are discharged as target loads, and the target output power is determined to be the sum of the required power of the target loads; the low-voltage power supply is used to drive the water pump in the vehicle to cool the battery; When the vehicle is not in a driving state, the temperature control system and low-voltage power supply in the vehicle are taken as target loads, and the target output power is determined to be the sum of the required power of the target loads.

2. The method according to claim 1, characterized in that, The step of executing the discharge strategy corresponding to the vehicle state on the battery includes: The link between the battery and the vehicle load is established, and the battery is controlled to output the target output power to discharge the vehicle load.

3. The method according to claim 2, characterized in that, The process of establishing the link between the battery and the vehicle load includes: Close the relay connected to the link between the battery and the vehicle load.

4. The method according to claim 2, characterized in that, The control of the battery to output the target output power includes: A current adjustment command is sent to a control device connected to the battery; the current adjustment command instructs the control device to adjust the discharge current of the battery so that the output power of the battery reaches the target output power.

5. The method according to claim 1, characterized in that, The step of executing the discharge strategy corresponding to the vehicle state on the battery includes: If the vehicle state remains unchanged, continue to apply the current discharge strategy to the battery; When the vehicle state changes, a discharge strategy corresponding to the changed vehicle state is executed on the battery.

6. The method according to claim 1, characterized in that, The process of disconnecting the battery discharge includes: Disconnect the relay connected to the link between the battery and the vehicle load.

7. The method according to claim 1, characterized in that, Prior to responding to an abnormal state of the battery in the vehicle, the method further includes: Obtain the target characteristic parameters of the battery; The temperature state of the battery is determined based on the target characteristic parameters.

8. The method according to claim 7, characterized in that, The method further includes: When the temperature state of the battery is normal, in response to the normal state of the battery, the discharge strategy corresponding to the normal state is executed on the battery. If the battery temperature condition is abnormal, the step of obtaining the vehicle status in response to the abnormal battery condition in the vehicle is performed.

9. A discharge control device, characterized in that, The device includes: An anomaly response module is used to respond to an abnormal state of the battery in the vehicle and obtain the vehicle status. The strategy execution module is used to determine the target output power based on the vehicle state, obtain a discharge strategy that uses the target output power as the battery's output power to the vehicle load, and control the battery to discharge to the vehicle load according to the discharge strategy; different vehicle states correspond to different discharge strategies; the vehicle state is used to characterize the overall vehicle operating state; different vehicle states correspond to different target output powers; The discharge disconnection module is used to stop executing the discharge strategy and disconnect the discharge of the battery when the vehicle reaches a preset power-off condition, so as to cut off the power output of the battery to the battery; the preset power-off condition includes reaching a preset mileage. The strategy execution module is also used for: When the vehicle is in a driving state, the electric drive system, temperature control system and low-voltage power supply in the vehicle are discharged as target loads, and the target output power is determined to be the sum of the required power of the target loads; the low-voltage power supply is used to drive the water pump in the vehicle to cool the battery; When the vehicle is not in a driving state, the temperature control system and low-voltage power supply in the vehicle are taken as target loads, and the target output power is determined to be the sum of the required power of the target loads.

10. A vehicle, characterized in that, The vehicle includes a battery, a domain controller, a control device, and a relay; the domain controller is connected to the battery via the control device and the relay; the domain controller is used to implement the steps of the method according to any one of claims 1 to 8.

11. A vehicle, characterized in that, The vehicle includes a battery, a vehicle controller, and a battery management system; the battery management system is used to acquire the battery status and determine the discharge strategy corresponding to the vehicle status based on the received vehicle status. Different vehicle states correspond to different discharge strategies; the vehicle state is used to characterize the overall vehicle operating state. The vehicle controller is used to respond to abnormal battery conditions, acquire vehicle status, receive discharge strategy corresponding to vehicle status, control battery to discharge to vehicle load according to discharge strategy, and stop executing discharge strategy and disconnect battery discharge when vehicle reaches preset power-off conditions, thereby cutting off battery power output to the vehicle load; the preset power-off conditions include reaching preset mileage; the discharge strategy is a discharge strategy that uses the target output power as the battery output power to vehicle load, determined based on vehicle status. The target output power varies depending on the vehicle's condition; Determining the target output power based on the vehicle status includes: When the vehicle is in a driving state, the electric drive system, temperature control system and low-voltage power supply in the vehicle are discharged as target loads, and the target output power is determined to be the sum of the required power of the target loads; the low-voltage power supply is used to drive the water pump in the vehicle to cool the battery; When the vehicle is not in a driving state, the temperature control system and low-voltage power supply in the vehicle are taken as target loads, and the target output power is determined to be the sum of the required power of the target loads.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 8.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 8.

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