Heating and charging control method and device, storage medium, product, equipment and vehicle

Abstract

The invention relates to a heating and charging control method and device, a storage medium, a product, equipment and a vehicle, and the method comprises the steps: determining a target heating and charging strategy of a battery according to the allowable electric performance data of the battery and the fluctuation electric performance data of an electric heating assembly; and performing heating and charging control on the battery based on the target heating and charging strategy. Because the allowable power utilization performance data of the battery can accurately represent the charging and discharging capability of the battery, whether the allowable power utilization performance data can cover the fluctuation electrical performance data of the electric heating assembly can be accurately judged according to the allowable power utilization performance data of the battery and the fluctuation electrical performance data of the electric heating assembly, so as to determine the heating and charging strategy of the battery; the charging efficiency of the battery is improved, the health state of the battery is protected, and the charging time is shortened.

Description

Technical Field

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

[0002] Because lithium iron phosphate (LFP) battery packs cannot be charged below -20°C and cannot discharge at low SOC, it is impossible to use the battery pack's electrical energy for heating. Under these conditions, the vehicle has neither power nor can it be charged, and therefore cannot start. Thus, a heating and charging solution for the vehicle's battery is needed. In related technologies, the battery is usually heated to a certain fixed temperature before charging. However, this heating and charging method increases unnecessary preheating time, avoids prolonged heating at extreme low temperatures, reduces battery heating and charging efficiency, and can also cause the battery to charge and discharge during the heating process, affecting battery life. Summary of the Invention

[0003] This application provides a heating and charging control method, apparatus, storage medium, product, equipment, and vehicle, which can solve the technical problems of low battery heating efficiency and inability to protect the battery, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a heating and charging control method is provided, the method comprising:

[0005] Based on the allowable electrical performance data of the battery and the fluctuating electrical performance data of the electric heating component, the target heating and charging strategy of the battery is determined.

[0006] The battery is heated and charged based on the target heating and charging strategy.

[0007] According to a second aspect of this application, a heating and charging control device is provided, the device comprising:

[0008] The determination module is used to determine the target heating and charging strategy of the battery based on the battery's allowable electrical performance data and the fluctuating electrical performance data of the electric heating component.

[0009] The control module is used to control the heating and charging of the battery based on the target heating and charging strategy.

[0010] According to a third aspect of this application, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the above-described heating and charging control method.

[0011] According to a fourth aspect of this application, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the above-described heating and charging control method.

[0012] According to a fifth aspect of this application, a computer device is provided, including a processor and a memory, the memory storing a plurality of instructions; the processor loads instructions from the memory to perform the steps of the heating and charging control method as described in the first aspect.

[0013] According to a sixth aspect of this application, a vehicle is provided, including the aforementioned computer equipment.

[0014] The heating and charging control method, apparatus, storage medium, product, device, and vehicle of this application determine a target heating and charging strategy for the battery based on the battery's permissible electrical performance data and the fluctuating electrical performance data of the electric heating component; and control the heating and charging of the battery based on the target heating and charging strategy. Since the battery's permissible electrical performance data accurately characterizes the battery's charge and discharge capacity, it is possible to accurately determine whether the permissible electrical performance data covers the fluctuating electrical performance data of the electric heating component, thereby determining the battery's heating and charging strategy. This improves battery charging efficiency, protects the battery's health, and reduces charging time.

[0015] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0018] Figure 1 This is a schematic flowchart of a heating and charging control method provided in some embodiments of this application;

[0019] Figure 2 This is a power curve diagram of the PTC after startup provided in some embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the high-voltage architecture of an electric vehicle provided in some embodiments of this application;

[0021] Figure 4 This is a flowchart illustrating the charging heating control method provided in some other embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the structure of the heating and charging control device provided in some embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the structure of a computer device provided in some embodiments of this application;

[0024] Figure 7 This is a structural schematic diagram of a vehicle provided in some embodiments of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0026] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In the description of this application, the word "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0028] In related technologies, the common practice is to heat the battery to a fixed temperature before charging. However, this heating-charging method increases unnecessary preheating time, avoids prolonged heating at extremely low temperatures, reduces battery heating-charging efficiency, and can lead to charging and discharging during the heating process, affecting battery life. Furthermore, because LFP batteries are limited by their electrochemical characteristics at low temperatures (e.g., below -30°C) and low SOC (below 10%), they cannot be charged or discharged. They must be heated first to raise the battery temperature before charging to restore the battery's charge and ensure the vehicle can operate on pure electric power.

[0029] This application provides a heating and charging control method. By determining a target heating and charging strategy for the battery based on its allowable electrical performance data and the fluctuating electrical performance data of the electric heating component, the method controls the heating and charging of the battery based on the target heating and charging strategy. Since the allowable electrical performance data of the battery accurately characterizes its charge and discharge capabilities, it is possible to accurately determine whether the allowable electrical performance data covers the fluctuating electrical performance data of the electric heating component, thereby determining the battery's heating and charging strategy. This improves battery charging efficiency, protects the battery's health, and reduces charging time.

[0030] Please see Figure 1 A heating and charging control method is provided, which is applied to computer equipment.

[0031] The computer equipment can be a terminal device or a server. The method includes:

[0032] Step S101: Determine the target heating and charging strategy for the battery based on the battery's allowable electrical performance data and the fluctuating electrical performance data of the electric heating component.

[0033] The permissible electrical performance data of a battery refers to the range of performance parameters within which the battery can operate safely and efficiently under specific conditions (such as low temperature and low state of charge). Permissible electrical performance data includes, but is not limited to, permissible current, permissible voltage, or permissible power.

[0034] In this embodiment, the electric heating component can be a thermistor heater with a positive temperature coefficient (PTC), a heating film, a heat pump, or other heating components used to heat the battery. For example, a PTC is preferred for rapid battery heating. Fluctuating electrical performance data characterizes the absolute value of the difference between the highest or lowest electrical performance data of the electric heating component and its rated electrical performance data under non-steady-state conditions. This absolute value reflects the maximum fluctuation range of the electric heating component under non-steady-state conditions. The target heating and charging strategy is a strategy used to heat and charge the battery.

[0035] Specifically, the computer device determines whether the allowable electrical performance data of the battery can cover the fluctuating electrical performance data based on the battery's permissible electrical performance data and the fluctuating electrical performance data of the electric heating component. Based on the determination result, a corresponding target heating and charging strategy is determined. Understandably, in this embodiment, since the battery's permissible electrical performance data accurately characterizes the battery's charge and discharge capabilities, the system can accurately determine whether the permissible electrical performance data can cover the fluctuating electrical performance data of the electric heating component, making the determination result more accurate, reducing unnecessary preheating time, and protecting the battery's health.

[0036] In some embodiments, the allowable electrical performance data includes allowable charge / discharge power and / or allowable charge / discharge current, and the fluctuating electrical performance data includes fluctuating power and / or fluctuating current.

[0037] The allowable electrical performance data can be the allowable charge / discharge power and / or the allowable charge / discharge current, and the corresponding fluctuation electrical performance data can be the fluctuation power and / or the fluctuation current.

[0038] In some embodiments, the fluctuating power is determined based on the rated power and peak power of the electric heating component; the fluctuating current is determined based on the rated current and peak current of the electric heating component.

[0039] Among them, peak power can be the peak power of an electric heating component such as a PTC at low temperature, and peak current can be the peak current of the electric heating component at low temperature.

[0040] Specifically, the fluctuating power can be the difference between the peak power and the rated power of the electric heating component. The fluctuating current can be the difference between the peak current and the rated current of the electric heating component. In this embodiment, the difference between the peak power and the rated power of the electric heating component is used as the fluctuating power, and / or the difference between the peak current and the rated current of the electric heating component is used as the fluctuating current. This facilitates ensuring that, when comparing the battery's allowable electrical performance data and fluctuating electrical performance data, the power or current that the battery can withstand after closing the relay can cover the fluctuating power or fluctuating current of the electric heating component, thereby protecting the battery's safety.

[0041] In some embodiments, the step of obtaining allowable electrical performance data of a battery includes: determining multiple lookup table electrical performance data at different temperatures using a lookup table method; and determining the allowable electrical performance data based on the lookup table electrical performance data.

[0042] Among them, the electrical performance data lookup refers to the electrical performance data found by using the table lookup method.

[0043] Specifically, multiple electrical performance data at different temperatures can be obtained by looking up the battery's power map table. Then, allowable electrical performance data can be determined based on the lookup electrical performance data. For example, the minimum lookup electrical performance data can be selected as the allowable electrical performance data.

[0044] In one specific implementation, the current SOC is 50%, the highest temperature is 5°C, and the lowest temperature is 0°C. The power value is A1 obtained by looking up a table based on 5°C, and the power value is A2 obtained by looking up a table based on 0°C. Since A1 > A2, the allowable electrical performance data is taken as A2. It is understandable that since the battery pack contains many cells, and the temperatures of different cells are inconsistent, there are deviations. Therefore, the allowable charge and discharge capabilities of different cells are different. Selecting the smallest table-lookup electrical performance data can ensure the safety of battery operation.

[0045] In some embodiments, when the permissible electrical performance data is less than or equal to the fluctuating electrical performance data, the target heating and charging strategy includes: a first strategy, which is at least used to heat the battery without charging it.

[0046] Specifically, when the allowable electrical performance data is less than or equal to the fluctuating electrical performance data, it indicates that the battery's allowable electrical performance data cannot cover the fluctuating electrical performance data of the electric heating component. Therefore, a target heating and charging strategy is determined to heat the battery without charging it—that is, heating only. Because the battery's electrochemical activity decreases at low temperatures, forced charging could severely impact battery life. By heating only without charging, irreversible damage to the battery caused by low-temperature charging can be avoided, thereby extending the battery's lifespan.

[0047] In some embodiments, the first strategy includes: disconnecting the relay corresponding to the battery through the battery management system, and heating the battery using a pure heating mode.

[0048] Among them, the relay corresponding to the battery can be a main positive relay. Disconnecting the main positive relay disconnects the high-voltage circuit, preventing current from flowing into the battery and causing overcharging or over-discharging, thus protecting the battery.

[0049] Specifically, when the allowable electrical performance data of the battery cannot cover the fluctuating electrical performance data of the electric heating component, the main positive relay corresponding to the battery is disconnected through the battery management system, which disconnects the high-voltage circuit. By disconnecting the main positive relay, the battery is protected from charging and discharging during the entire process under the current low temperature and low SOC conditions. At the same time, the battery is heated in a pure heating mode, which can improve the heating and charging efficiency of the battery in the future while protecting the battery safety.

[0050] In one specific implementation, the current mainstream heating method for batteries is PTC heating (using the power from the charging station to drive the PTC heating). A characteristic of PTC is that its power fluctuates significantly during startup, especially at low temperatures. For example, a 6kW PTC can reach 12kW or higher during startup at -30℃, and this power fluctuates continuously. If a constant current is requested from the charging station during the heating process, excess current may flow into the battery, or the battery may discharge due to insufficient current, leading to problems such as reduced battery life. Figure 2 The figure shown is a power curve after the PTC starts up.

[0051] The inventors discovered that when the battery pack relay is in the closed state and the PTC circuit is closed to heat the battery, the battery management system cannot accurately send the heating power to the charging pile because the PTC's starting power is approximately twice its rated power and its power is constantly fluctuating rather than stable. In this situation, the main relay is in the closed state, which presents two problems. First, if the requested power from the charging pile is greater than the actual power consumed by the PTC, when the PTC fluctuates to a lower power point, the current output from the charging pile will flow into the battery pack, causing overcurrent in the battery cell. Second, if the requested power from the charging pile is less than the actual power consumed by the PTC, when the PTC fluctuates to its peak power, the output of the charging pile will not meet the load, causing the battery to discharge externally, resulting in over-discharge of the battery cell.

[0052] Understandably, in this embodiment, when the allowable electrical performance data of the battery cannot cover the fluctuating electrical performance data of the electric heating component, the problem of current flowing into the battery and causing overcharging and over-discharging is avoided when the PTC power fluctuates, thus protecting the battery.

[0053] Before disconnecting the relay corresponding to the battery via the battery management system, the method further includes: sending the current total voltage of the battery to the charging device of the battery via the battery management system.

[0054] Specifically, before disconnecting the relay corresponding to the battery, the battery management system sends the total voltage of the current battery pack to the charging station. This voltage is the sum of the voltages of all cells in the battery pack. By ensuring that the bus voltage detected by the charging equipment (such as the charging station) is consistent with the actual voltage of the battery pack, false alarms caused by voltage differences in the charging station are avoided. At the same time, by continuously sending accurate voltage information, normal communication between the charging equipment and the battery management system is ensured, thereby maintaining the stability of the charging process.

[0055] In some embodiments, a first charging request current is determined based on the rated power of the electric heating component; the battery is heated according to the first charging request current until a first heating termination condition is met.

[0056] The first charging request current is determined based on the rated power of the electric heating component and the current consumed by the load (such as a DC-DC converter or compressor). The first charging request current I1 can be calculated using the following formula:

[0057] I1=(W P +W D ) / V-I0;

[0058] W P This refers to the rated power (W) of an electric heating element such as a PTC heater. D The value is represented by the power of the DC-DC converter, V represents the current voltage, and I0 represents the protection current threshold.

[0059] Specifically, in this embodiment, the first charging request current is determined based on the rated power of the electric heating component, and the value of the first charging request current is determined based on the PTC power, excluding the charging demand current of the battery. This enables pure heating of the battery, ensuring that the battery is not charged or discharged. Simultaneously, the battery is heated using the first charging request current until the first heating termination condition is met, achieving precise control of heating power and heating time, heating only when necessary, and avoiding unnecessary energy waste.

[0060] In some embodiments, the first heating termination condition is that the fluctuating electrical performance data of the electric heating component is less than or equal to a preset threshold; and / or, the heating duration reaches a preset duration.

[0061] The preset threshold can be 0.5, meaning that when the fluctuating electrical performance data of the electric heating component is less than or equal to this threshold, it indicates that the electrical performance data of the electric heating component is in a steady state.

[0062] In some embodiments, the preset duration is used to indicate the time required for the electric heating component to stabilize from the start of power-on until the corresponding electrical performance data tends to stabilize.

[0063] Specifically, the preset duration, such as 3 minutes, can be determined based on the measured data of the electric heating component, such as a PTC. Understandably, in this embodiment, by setting the duration required for the electric heating component to stabilize from the start of power-on as the first heating termination condition, the target heating and charging strategy for the battery can be determined based on whether there are power fluctuations in the electric heating component. This fully considers the impact of fluctuating power of the electric heating component on battery heating and charging, ensuring the safety of battery heating and charging.

[0064] In some embodiments, the first strategy further includes: heating and charging the battery in a simultaneous heating and charging mode when the first heating termination condition is met and the allowable electrical performance data is greater than the fluctuating electrical performance data.

[0065] Specifically, when the first heating termination condition is met, indicating that the heating duration reaches the power stabilization time of the electric heating component and the allowable electrical performance data can cover the fluctuating electrical performance data, the battery is heated and charged in a simultaneous heating and charging mode. This simultaneous heating and charging mode reduces the time for separate heating and charging, thereby significantly shortening the overall charging time.

[0066] In some embodiments, the method of heating and charging the battery simultaneously includes: closing the relay corresponding to the battery to charge the battery; determining a second charging request current based on the rated power of the electric heating component and the charging current demand of the battery; and heating and charging the battery according to the second charging request current.

[0067] The second charging request current can be determined based on the rated power of the electric heating component, the battery's charging current requirement, and the current consumed by the load (such as a DC-DC converter, compressor, etc.). The second charging request current I2 can be calculated using the following formula:

[0068] I2=(W P +W D ) / V+I t -I0;

[0069] W P This is expressed as the rated power of the PTC, in W. D The power of the DC-DC converter is expressed as V, where V represents the current voltage and I represents the current voltage.t I0 represents the battery's charging current requirement, and I0 represents the protection current threshold.

[0070] Specifically, the relay corresponding to the battery is closed to connect the battery to the high-voltage circuit. The second charging request current is determined based on the rated power of the electric heating component and the charging current demand of the battery. The battery is then heated and charged according to the second charging request current. Since the second charging request current includes the charging current demand of the battery, it can achieve the heating and charging of the battery. In this embodiment, the charging current is requested from the charging pile during the stable power stage of the electric heating component, such as the PTC, which improves the heating and charging efficiency of the battery.

[0071] In some embodiments, when the allowable electrical performance data is greater than the fluctuating electrical performance data, the target heating-charging strategy includes a second strategy, which is used to switch the battery from heating to charging.

[0072] Specifically, when the allowable electrical performance data is greater than the fluctuating electrical performance data, it indicates that the allowable electrical performance data of the battery can cover the fluctuating electrical performance data of the electric heating component. The target heating and charging strategy is determined for the battery to switch from heating to charging. Since the allowable electrical performance data of the battery can cover the fluctuating electrical performance data of the electric heating component, it is possible to switch to charging when the PTC power is stable by heating without charging, which protects the battery and improves charging efficiency.

[0073] In some embodiments, the transition from heating to charging includes: determining a third charging request current based on the rated power of the electric heating component; heating the battery based on the third charging request current; and, if a second heating termination condition is met, determining a fourth charging request current for the battery and charging the battery based on the fourth charging request current.

[0074] The third charging request current is determined based on the rated power of the electric heating component and the current consumed by the load (such as a DC-DC converter or compressor). The third charging request current I3 can be calculated using the following formula:

[0075] I3=(W P +W D ) / V-I0;

[0076] W P This is expressed as the rated power of the PTC, in W. D The value is represented by the power of the DC-DC converter, V represents the current voltage, and I0 represents the protection current threshold.

[0077] Specifically, when the second heating termination condition is not met, it indicates PTC power fluctuation. At this time, a third charging request current is used to heat the battery. The value of the third charging request current is determined based on the PTC power and does not include the battery's charging demand current. Simultaneously, the battery's allowable electrical performance data can cover the fluctuating electrical performance data of the electric heating component. Therefore, during this period, according to the third charging request current value, even if all the fluctuating PTC power is applied to the battery, it is still within the battery's capacity and will not cause damage. Thus, heating the battery according to the third request current can protect battery safety while improving battery heating efficiency. When the second heating termination condition is met, it indicates that the PTC power fluctuation is stable. At this time, a fourth charging request current is determined for the battery, and the battery is charged according to this fourth charging request current, achieving efficient charging of the battery.

[0078] In some embodiments, the second heating termination condition includes: the fluctuating electrical performance data of the electric heating component is less than or equal to a preset threshold; and / or, the heating duration reaches a preset duration.

[0079] The second heating condition in this embodiment is similar in principle to the first heating condition in the above embodiment.

[0080] In some embodiments, a fourth charging request current is determined based on the rated power of the electric heating component and the charging demand current of the battery.

[0081] The fourth charging request current can be determined based on the rated power of the electric heating component, the battery's charging current requirement, and the current consumed by the load (such as a DC-DC converter, compressor, etc.). The fourth charging request current I4 can be calculated using the following formula:

[0082] I4=(W P +W D ) / V+I t -I0;

[0083] W P This is expressed as the rated power of the PTC, in W. D The power of the DC-DC converter is expressed as V, where V represents the current voltage and I represents the current voltage. t I0 represents the battery's charging current requirement, and I0 represents the protection current threshold.

[0084] Understandably, since the fourth charging request current includes the battery's charging demand current, it can achieve heating and charging of the battery. In this embodiment, during the PTC power stabilization phase, the charging current is requested from the charging pile, which improves the battery's charging efficiency.

[0085] In some embodiments, before determining the target heating and charging strategy for the battery based on the battery's permissible electrical performance data and the fluctuating electrical performance data of the electric heating component, the method further includes: upon detecting that the battery has completed its charging configuration, controlling the closing of a relay corresponding to the battery, the relay including at least one of a main positive relay, a fast charging relay, and a pre-charge relay.

[0086] Specifically, battery charging configuration completion means that communication between the vehicle and the charging station has been established, all necessary charging parameters (such as voltage, current, and charging mode) have been negotiated, and the vehicle's high-voltage system is ready to enter the charging state. This is represented by a status flag BR0 / CRO = AA in the communication protocol between the vehicle and the charging station.

[0087] In this system, BR0 (Battery Ready 0) is a signal sent by the vehicle's battery management system to the charging station, indicating that the vehicle's battery is ready to receive charging. CRO (Charger Ready Output) is a signal sent by the charging station to the vehicle, indicating that the charging station is ready to provide charging. AA is a status code indicating "ready". When both BR0 and CRO are AA, it means that both the vehicle and the charging station are ready to charge.

[0088] Specifically, after the battery completes the charging configuration, the corresponding relay for the battery is closed. The relay includes at least one of the main positive relay, fast charging relay, and pre-charge relay to connect the battery to the high-voltage circuit and establish a complete electrical connection between the battery and the external charging equipment to ensure that the charging process is safe and efficient.

[0089] Step S102: Perform heating and charging control on the battery based on the target heating and charging strategy.

[0090] Specifically, the battery is heated and charged according to the target heating and charging strategy. Understandably, since the target heating and charging strategy is determined based on the battery's allowable electrical performance data and the fluctuating electrical performance data of the electric heating component, it has high accuracy and is adapted to the battery's charging and heating requirements. Therefore, by controlling the battery's heating and charging based on this relatively accurate target heating and charging strategy, precise control of the battery's heating and charging is achieved, and the efficiency of battery heating and charging is improved.

[0091] In one specific implementation, such as Figure 3The diagram shows a high-voltage architecture for an electric vehicle. This architecture includes high-voltage components such as a power battery, drive motor, motor controller, PTC, electric compressor, and on-board charging station. It is connected to the charging station via high voltage. In the vehicle's high-voltage circuit, the battery is the power source when not charging, and the loads include thermal management accessories (PTC, compressor, etc.), DC-DC converter, and drive motor. During fast charging, a fast-charging relay establishes high-voltage connectivity with the charging station. During charging, the charging station acts as the power source, while the battery, thermal management accessories (PTC, compressor, etc.), and DC-DC converter act as loads. Based on physical principles such as potential difference, the current from the charging station preferentially flows to loads like the PTC and DC-DC converter, which do not inherently have voltage. When the output of the charging station cannot meet the needs of the PTC and DC-DC converter, the battery will replenish the power to the loads in the entire circuit.

[0092] To ensure that electric vehicles (pure electric, hybrid, and other models with fast charging capabilities) can have their electrical energy restored by external charging equipment when they are depleted and in extremely low ambient temperatures, the following methods can be used: Figure 4 The heating and charging control method shown is executed. Figure 4 The flowchart of the charging heating control method is as follows:

[0093] 1) Based on the measured data of PTC, confirm the difference between its low-temperature peak power and rated power, and set it as X kW;

[0094] 2) In low temperature and low SOC environments, when the battery needs to be heated, the vehicle connects to a fast charging station and starts charging. The BMS then interacts with the charging station according to national standards.

[0095] 3) The BMS communicates with the charging pile and performs charging configuration according to the normal national standard procedure (GB / T 27930 or other supercharging protocols) during the charging CAN.

[0096] 4) Once the charging handshake and configuration phase is complete, the BMS has closed the main relay and fast charging relay. The BMS sends BRO=AA in the charging CAN, and the charging pile sends CRO=AA in the charging CAN. Thus, the configuration phase is complete, and the high-voltage circuit between the vehicle and the charging pile is connected.

[0097] 5) The BMS monitors the temperature of each temperature sampling point of the battery in real time and estimates the SOC. After configuration, it calculates the allowable charging and discharging power of the current battery pack based on the power map of the entire battery pack or the power map of the cells. It looks up the table to obtain the allowable charging and discharging power of the current battery pack (look up the table according to the highest temperature, lowest temperature and SOC respectively, and take the minimum value after looking up the table for calculation) and determines whether the allowable charging and discharging power of the battery is greater than XkW.

[0098] 6a1) If the allowable charging and discharging power of the battery is greater than XkW, then send a charging request current to the BCL. The request current value is equal to (rated power of PTC + DC-DC power) / current voltage.

[0099] 6a2) If the duration of the requested current value in 6a1) above is determined based on the test results of the PTC leaving the peak power fluctuation range (generally 3 minutes for PTC), the PTC of different models can be set to different times. After this time, the requested current can be increased. Requested current = cell charging demand current + (PTC rated power + DC-DC power consumption) / voltage.

[0100] 6b1) When the allowable charging and discharging power of the battery is ≤XkW, the BMS control disconnects the main positive relay;

[0101] 6b2) The BMS sends the normal total battery voltage to the charging pile (this voltage is sent based on the cumulative voltage of the battery pack cells) and requests current from the charging pile according to the rated power of the PTC.

[0102] 6b3) The duration is determined based on the test results of the PTC leaving the peak power fluctuation range (generally 3 minutes for PTC). After 3 minutes, it is determined whether the allowable power is > X kW. If not, the current is requested according to the rated power of the PTC until the allowable power is > X kW.

[0103] 6b4) If the allowable power is greater than XkW, then close the main positive relay (no pre-charging required), and at the same time request the current = cell charging current + (PTC rated power + DC-DC power consumption) / voltage;

[0104] 7) After successfully requesting charging current through step 6a2) or step 6b4), the charging and heating process will proceed normally.

[0105] By using steps 1)-7) above, the battery can be heated while ensuring battery safety until it has the ability to be charged. Then, the battery can be charged by an external charging device, thereby enabling the vehicle to have the ability to drive on pure electric power, especially avoiding the breakdown of pure electric vehicles in winter.

[0106] The aforementioned heating and charging control method determines a target heating and charging strategy for the battery based on the battery's allowable electrical performance data and the fluctuating electrical performance data of the electric heating component; and then controls the heating and charging of the battery based on the target heating and charging strategy. Since the battery's allowable electrical performance data accurately characterizes its charge and discharge capabilities, it is possible to accurately determine whether the allowable electrical performance data covers the fluctuating electrical performance data of the electric heating component, thereby determining the battery's heating and charging strategy. This improves battery charging efficiency, protects the battery's health, and reduces charging time.

[0107] It should be understood that although the steps in the flowcharts of the above embodiments 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 above embodiments 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.

[0108] Based on the same inventive concept, this application also provides a heating and charging control device for implementing the heating and charging control method involved in the above-described embodiments where a computer device is the executing entity. The solution provided by this device is similar to the implementation described in the above-described method. Therefore, the specific limitations of one or more heating and charging control device embodiments provided below can be found in the limitations of the heating and charging control method involved in the embodiments where a computer device is the executing entity described above, and will not be repeated here.

[0109] In some embodiments, such as Figure 5 As shown, a heating and charging control device is provided, which can be integrated into a computer device, including:

[0110] Determine module 501 and control module 502, wherein:

[0111] The determination module 501 is used to determine the target heating and charging strategy of the battery based on the allowable electrical performance data of the battery and the fluctuating electrical performance data of the electric heating component.

[0112] The control module 502 is used to control the heating and charging of the battery based on the target heating and charging strategy.

[0113] In some embodiments, the allowable electrical performance data includes allowable charge / discharge power and / or allowable charge / discharge current, and the fluctuating electrical performance data includes fluctuating power and / or fluctuating current.

[0114] In some embodiments, the step of obtaining allowable electrical performance data of a battery includes: determining multiple lookup table electrical performance data at different temperatures using a lookup table method; and determining the allowable electrical performance data based on the lookup table electrical performance data.

[0115] In some embodiments, when the permissible electrical performance data is less than or equal to the fluctuating electrical performance data, the target heating and charging strategy includes: a first strategy, which is at least used to heat the battery without charging it.

[0116] In some embodiments, the apparatus further includes:

[0117] A transmitting module is used to transmit the current total voltage of the battery to the charging device of the battery through the battery management system.

[0118] In some embodiments, the determining module 501 is specifically configured to determine a first charging request current based on the rated power of the electric heating component; and to heat the battery according to the first charging request current until a first heating termination condition is met.

[0119] In some embodiments, the first heating termination condition includes: the fluctuating electrical performance data of the electric heating component is less than or equal to a preset threshold; and / or, the heating duration reaches a preset duration.

[0120] In some embodiments, the preset duration is used to indicate the time required for the electric heating component to stabilize from the start of power-on until the corresponding electrical performance data tends to stabilize.

[0121] In some embodiments, the first strategy further includes: heating and charging the battery in a simultaneous heating and charging mode when the first heating termination condition is met and the allowable electrical performance data is greater than the fluctuating electrical performance data.

[0122] In some embodiments, the method of heating and charging the battery simultaneously includes: closing the relay corresponding to the battery to charge the battery; determining a second charging request current based on the rated power of the electric heating component and the charging current demand of the battery; and heating and charging the battery according to the second charging request current.

[0123] In some embodiments, when the allowable electrical performance data is greater than the fluctuating electrical performance data, the target heating-charging strategy includes a second strategy, which is used to switch the battery from heating to charging.

[0124] In some embodiments, the transition from heating to charging includes: determining a third charging request current based on the rated power of the electric heating component; heating the battery based on the third charging request current; and, if a second heating termination condition is met, determining a fourth charging request current for the battery and charging the battery based on the fourth charging request current.

[0125] In some embodiments, the second heating termination condition includes: the fluctuating electrical performance data of the electric heating component is less than or equal to a preset threshold; and / or, the heating duration reaches a preset duration.

[0126] In some embodiments, the step of determining the fourth charging request current includes: determining the fourth charging request current based on the rated power of the electric heating component and the charging demand current of the battery.

[0127] In some embodiments, the device further includes: a first control module, configured to control a relay corresponding to the battery to close when the battery is detected to have completed charging configuration, the relay including at least one of a main positive relay, a fast charging relay, and a pre-charge relay.

[0128] Each module in the aforementioned devices can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the control device in hardware form or independently of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0129] In some embodiments, a computer device is provided, the internal structure of which can be shown as follows: Figure 6 As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a heating and charging control method.

[0130] Optionally, the computer device also includes a display unit. The display unit is used to form a visually visible image and can be a screen, a projection device, or a virtual reality imaging device. The screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the screen, or buttons, a trackball, or a touchpad located on the computer device casing, or an external keyboard, touchpad, or mouse, etc.

[0131] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the control device applied thereto. The specific control device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0132] Those skilled in the art will understand that all or part of the processes in the methods of 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 of the above methods. 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 processors involved in the embodiments provided in this application can 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 thereto.

[0133] Accordingly, embodiments of this application also provide a computer device, which may be a terminal device or a server.

[0134] like Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. The computer device 1000 includes a processor 1001 with one or more processing cores, a memory 1002 with one or more computer-readable storage media, and a computer program stored on the memory 1002 and executable on the processor. The processor 1001 and the memory 1002 are electrically connected. Those skilled in the art will understand that the computer device structure shown in the figure does not constitute a limitation on the computer device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0135] The processor 1001 is the control center of the computer device 1000. It connects various parts of the computer device 1000 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1002, and by calling data stored in the memory 1002, it executes various functions of the computer device 1000 and processes data, thereby providing overall monitoring of the computer device 1000. The processor 1001 can be a central processing unit (CPU), a graphics processing unit (GPU), a network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this application.

[0136] In this embodiment, the processor 1001 in the computer device 1000 loads the instructions corresponding to the processes of one or more application programs into the memory 1002 according to the following steps, and the processor 1001 runs the application programs stored in the memory 1002 to realize various functions, such as: compensating for the target steering wheel angle of the vehicle based on the lateral error and vehicle speed to obtain a compensated steering wheel angle; and controlling the steering of the vehicle based on the compensated steering wheel angle. Specific implementations of the above operations can be found in the preceding embodiments and will not be repeated here.

[0137] Optionally, such as Figure 6 As shown, the computer device 1000 also includes: a touch screen display 1003, a radio frequency circuit 1004, an audio circuit 1005, an input unit 1006, and a power supply 1007. The processor 1001 is electrically connected to the touch screen display 1003, the radio frequency circuit 1004, the audio circuit 1005, the input unit 1006, and the power supply 1007. Those skilled in the art will understand that... Figure 6The computer device structure shown does not constitute a limitation on the computer device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0138] The touch display screen 1003 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 1003 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the computer device. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or similar technology. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), and generate corresponding operation commands, which then execute the corresponding program. Optionally, the touch panel may include both a touch detection device and a touch computer device. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch computer device. The touch computer device receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 1001. It can also receive and execute commands from the processor 1001. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 1001 to determine the type of touch event. Subsequently, the processor 1001 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 1003 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 1003 can be implemented as two independent components to achieve input and output functions. That is, the touch display screen 1003 can also be used as part of the input unit 1006 to achieve input functions.

[0139] The radio frequency circuit 1004 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other computer devices, and to transmit and receive signals with network devices or other computer devices.

[0140] Audio circuit 1005 can be used to provide an audio interface between a user and a computer device via a speaker and a microphone. Audio circuit 1005 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 1005, converted back into audio data, and then processed by processor 1001 before being transmitted via radio frequency circuit 1004 to, for example, another computer device, or output to memory 1002 for further processing. Audio circuit 1005 may also include an earphone jack to provide communication between peripheral headphones and the computer device.

[0141] The input unit 1006 can be used to receive input numbers, character information or user feature information (such as fingerprints, iris, facial information, etc.), and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0142] Power supply 1007 is used to supply power to various components of computer device 1000. Optionally, power supply 1007 can be logically connected to processor 1001 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 1007 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0143] although Figure 6 As not shown in the diagram, the computer device 1000 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0144] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0145] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0146] Therefore, embodiments of this application provide a computer-readable storage medium storing multiple computer programs that can be loaded by a processor to execute any of the heating and charging control methods provided in this application. The computer program can execute the following steps of the heating and charging control method: compensating for the target steering wheel angle of the vehicle based on the vehicle's lateral error and speed to obtain a compensated steering wheel angle; and controlling the vehicle's steering based on the compensated steering wheel angle. Specific implementations of the above operations can be found in the preceding embodiments and will not be repeated here.

[0147] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0148] Since the computer program stored in the computer-readable storage medium can execute any of the heating and charging control methods provided in the embodiments of this application, the beneficial effects that any of the heating and charging control methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0149] According to one aspect of this application, a computer program product or computer program is also provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in the various optional implementations of the above embodiments.

[0150] According to one aspect of this application, such as Figure 7 As shown, a vehicle 10 is also provided, which includes the aforementioned computer equipment. This vehicle has all the beneficial effects of the aforementioned computer equipment, etc., which will not be elaborated further here.

[0151] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

[0152] In the above embodiments of the heating and charging control device, computer-readable storage medium, computer device, and computer program product, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes and beneficial effects of the heating and charging control device, computer-readable storage medium, computer program product, computer device, and their corresponding units described above can be referred to the description of the heating and charging control method in the above embodiments, and will not be repeated here.

[0153] 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.

[0154] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although the descriptions of each embodiment in this application have different focuses, and the parts not described in detail in a certain embodiment can be referred to the relevant embodiments of other embodiments, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A heating charge control method characterized by, The method comprises: determining a target heating charging strategy of the battery according to allowable electrical performance data of the battery and fluctuation electrical performance data of the electric heating assembly; controlling heating charging of the battery based on the target heating charging strategy.

2. The method of claim 1, wherein, The allowable electrical performance data comprises allowable charging and discharging power and / or current, and the fluctuation electrical performance data comprises fluctuation power and / or current.

3. The method of claim 2, wherein, The fluctuation power is determined according to rated power and peak power of the electric heating assembly. The fluctuation current is determined according to rated current and peak current of the electric heating assembly.

4. The method of claim 2, wherein, The step of obtaining the allowable electrical performance data of the battery comprises: determining a plurality of table electrical performance data at different temperatures by table lookup; determining the allowable electrical performance data according to the table electrical performance data.

5. The method of claim 1, wherein, In a case where the allowable electrical performance data is less than or equal to the fluctuation electrical performance data, the target heating charging strategy comprises a first strategy, which is used at least to realize heating of the battery without charging.

6. The method of claim 5, wherein, The first strategy comprises: disconnecting a relay corresponding to the battery by a battery management system, and heating the battery in a pure heating mode.

7. The method of claim 6, wherein, Before the relay corresponding to the battery is disconnected by the battery management system, the method further comprises: sending, by the battery management system, a current total voltage of the battery to a charging device of the battery.

8. The method of claim 6, wherein, The heating of the battery in the pure heating mode comprises: determining a first charging request current according to rated power of the electric heating assembly; heating the battery according to the first charging request current until a first heating end condition is met.

9. The method of claim 8, wherein, The first heating end condition comprises: the fluctuation electrical performance data of the electric heating assembly is less than or equal to a preset threshold; and / or, a heating duration reaches a preset duration.

10. The method of claim 9, wherein, The preset duration is used to indicate a duration required for the electric heating assembly to be powered on to corresponding electrical performance data tending to be stable.

11. The method of claim 8, wherein, The first strategy further comprises: in a case where the first heating end condition is met and the allowable electrical performance data is greater than the fluctuation electrical performance data, heating and charging the battery in a heating and charging mode.

12. The method of claim 11, wherein, The heating and charging of the battery in the heating and charging mode comprises: closing the relay corresponding to the battery to charge the battery; determining a second charging request current according to rated power of the electric heating assembly and a charging demand current of the battery; heating and charging the battery according to the second charging request current.

13. The method of claim 1, wherein, In a case where the allowable electrical performance data is greater than the fluctuation electrical performance data, the target heating charging strategy comprises a second strategy, which is used to realize a transition from heating to charging of the battery.

14. The method of claim 13, wherein, The transition from heating to charging comprises: determining a third charging request current according to rated power of the electric heating assembly; heating the battery according to the third charging request current; in a case where a second heating end condition is met, determining a fourth charging request current of the battery and charging the battery according to the fourth charging request current.

15. The method of claim 14, wherein, The second heating end condition comprises: fluctuation electrical performance data of the electric heating assembly is less than or equal to a preset threshold; and / or, a heating duration reaches a preset duration.

16. The method of claim 14, wherein, The step of determining the fourth charging request current comprises: The fourth charging request current is determined according to a rated power of the electric heating assembly and a charging demand current of the battery.

17. The method according to any one of claims 1 to 16, characterized in that, Before determining the target heating charging strategy of the battery according to the allowable electrical performance data of the battery and the fluctuation electrical performance data of the electric heating assembly, the method further comprises: In a case where it is detected that the battery completes the charging configuration, a relay corresponding to the battery is controlled to be closed, the relay comprising at least one of a main positive relay, a fast charging relay and a pre-charging relay.

18. A heating charge control device characterized by comprising: The device comprises: A determining module configured to determine a target heating charging strategy of the battery according to allowable electrical performance data of the battery and fluctuation electrical performance data of the electric heating assembly; A control module configured to control heating charging of the battery based on the target heating charging strategy.

19. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by a processor to implement the heating charging control method of any one of claims 1 to 17.

20. A computer program product comprising a computer program, characterized in that, The computer program is executed by a processor to implement the heating charging control method of any one of claims 1 to 17.

21. A computer device, comprising: Comprise: A memory having a computer program stored thereon; A processor configured to execute the computer program in the memory to implement the heating charging control method of any one of claims 1 to 17.

22. A vehicle characterized by Comprise the computer equipment of claim 21 and / or the heating charging control device of claim 18.

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