Battery thermal management method, electronic device, computer program product and vehicle

Abstract

The invention discloses a battery thermal management method, electronic equipment, a computer program product and a vehicle. The battery thermal management method comprises the following steps: determining that a battery has a pre-cooling or pre-heating demand; according to the pre-cooling or pre-heating requirement of the battery and the heat management requirement of the passenger compartment, the rotating speed of a cooling capacity power source used for heat management of the battery and the passenger compartment is controlled, and the priority of the heat management requirement of the passenger compartment is higher than that of the pre-cooling or pre-heating requirement of the battery. By means of the method, the temperature adjusting requirement of the passenger compartment can be met while the battery is charged and precooled, and the comfort level and the experience feeling of a user are improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a battery thermal management method, electronic equipment, computer program product, and vehicle. Background Art

[0002] Existing vehicles only perform pre-cooling action judgment before pre-cooling the battery pack, but do not consider the impact of battery cooling on the cooling capacity in the passenger compartment after it is started, which reduces user comfort and experience. Summary of the Invention

[0003] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a battery thermal management method that can pre-cool the battery during charging while maintaining the required temperature control in the passenger compartment, thereby improving user comfort and experience.

[0004] A second objective of the present invention is to provide an electronic device.

[0005] A third objective of the present invention is to provide a non-volatile readable storage medium.

[0006] A fourth object of the present invention is to provide a computer program product.

[0007] A fifth object of the present invention is to provide a vehicle.

[0008] In order to solve the above problems, an embodiment of the first aspect of the present invention provides a battery thermal management method, including: determining whether the battery has a pre-cooling or preheating requirement; controlling the speed of a cold power source used for thermal management of the battery and the passenger compartment according to the pre-cooling or preheating requirement of the battery and the thermal management requirement of the passenger compartment, wherein the priority of the thermal management requirement of the passenger compartment is higher than the pre-cooling or preheating requirement of the battery.

[0009] According to the battery thermal management method of an embodiment of the present invention, the rotation speed of the cooling power source is controlled according to the pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger compartment, so as to meet the pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger compartment. Therefore, compared with the existing vehicle only performing pre-cooling action judgment, in this application, the rotation speed of the cooling power source is controlled by the cooling required by the vehicle, so that when the cooling power source provides the cooling required for pre-cooling or preheating to the battery, it also provides the cooling required for the thermal management requirements of the passenger compartment, thereby ensuring the comfort of the passenger compartment while charging and pre-cooling the battery, thereby improving the user's comfort and experience.

[0010] In some embodiments, the rotational speed of a cold power source for thermal management of the battery and the passenger compartment is controlled based on the pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger compartment, including: determining that the current remaining power of the battery is the amount of power that can be allocated to meet the pre-cooling or preheating requirements of the battery, and determining the current operating status of an air-conditioning system that provides thermal management for the passenger compartment, wherein the air-conditioning system is connected to the battery thermal management system, and the cold power source includes a compressor of the air-conditioning system; and controlling the rotational speed of the compressor based on the allocable power and the current operating status of the air-conditioning system.

[0011] In some embodiments, determining that the current remaining power of the battery is the power that can be allocated to meet the pre-cooling or preheating requirements of the battery includes: determining a target gear at which the current remaining power of the battery meets the pre-cooling or preheating requirements of the battery, the gear at which the current remaining power of the battery meets the pre-cooling or preheating requirements of the battery is positively correlated with the allocable power, and the gear is positively correlated with the cooling capacity of the battery for pre-cooling or preheating.

[0012] In some embodiments, determining the target gear at which the current remaining battery power meets the pre-cooling or pre-heating requirements of the battery includes: determining the power consumption required for each battery preheating or pre-cooling gear based on the navigation mileage information of the vehicle arriving at the destination; determining a preliminary gear at which the current remaining battery power meets the power consumption; and the target gear is the gear with the highest power consumption among the preliminary gears.

[0013] In some embodiments, the speed of the compressor is controlled according to the allocable power and the current operating status of the air-conditioning system, including: when the target gear is a first-type gear and the air-conditioning system is in operation, the target gear is switched to a second-type gear; wherein, the first-type gear is a gear corresponding to which the pre-cooling or pre-heating cooling capacity of the battery is higher than a cooling capacity threshold, and the second-type gear is a gear corresponding to which the pre-cooling or pre-heating cooling capacity of the battery is lower than the cooling capacity threshold.

[0014] In some embodiments, before the target gear is switched to the second type gear, the battery thermal management method further includes: determining that the ambient temperature exceeds a temperature threshold range.

[0015] In some embodiments, the speed of the compressor is controlled according to the allocable power and the current operating status of the air-conditioning system, including: when the target gear is the first type of gear and the air-conditioning system is not in operation, the speed of the compressor is controlled according to the target gear.

[0016] In some embodiments, the speed of the compressor is controlled according to the allocable power and the current operating status of the air-conditioning system, including: when the target gear is the second type of gear and the compressor is at the maximum allowable operating speed of the compressor, temporarily not responding to the pre-cooling or preheating request of the target gear; until the passenger compartment temperature reaches a second temperature threshold, the speed of the compressor and the valve opening of the air-conditioning system are controlled according to the target gear.

[0017] In some embodiments, controlling the speed of the compressor based on the allocable power and the current operating status of the air-conditioning system also includes: when the target gear is the second type of gear and the compressor is not at the maximum allowable operating speed of the compressor, controlling the speed of the compressor and the valve opening of the air-conditioning system according to the target gear.

[0018] In some embodiments, the battery thermal management method further includes: determining that the current remaining power of the battery meets the requirements for the vehicle to reach the destination, and maintaining the vehicle's pre-cooling or pre-heating of the battery; or determining that the current remaining power of the battery does not meet the requirements for the vehicle to reach the destination, and stopping the pre-cooling or pre-heating of the vehicle.

[0019] In some embodiments, the battery thermal management method further includes: when the vehicle arrives at the destination or receives an operation instruction to cancel battery precooling or preheating, the vehicle stops the precooling or preheating process for the battery, In a second aspect, an embodiment of the present invention provides an electronic device, comprising: at least one processor; a memory communicatively connected to the at least one processor; a computer program executable by the at least one processor is stored in the memory, and when the at least one processor executes the computer program, the battery thermal management method described in the above embodiment is implemented.

[0020] According to the electronic device of the embodiment of the present invention, by executing the battery thermal management method of the above embodiment, the temperature control requirements of the passenger compartment can be ensured while the battery is being charged and pre-cooled, thereby improving the user's comfort and experience.

[0021] A third aspect of the present invention provides a non-volatile readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the battery thermal management method described in the above embodiment.

[0022] A fourth aspect of the present invention provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions, which, when executed by a computer, enable the computer to execute the battery thermal management method described in the above embodiment.

[0023] A fifth aspect of the present invention provides a vehicle, comprising: a battery; a battery thermal management system and an air-conditioning system for providing thermal management for a passenger compartment, wherein the air-conditioning system is connected to the battery thermal management system, and the air-conditioning system includes a cold power source for providing thermal management for the battery and the passenger compartment; a controller, wherein the controller is connected to the battery thermal management system and the air-conditioning system, and is used to execute the battery thermal management method described in the above embodiment.

[0024] According to the vehicle of the embodiment of the present invention, by executing the battery thermal management method of the above embodiment, the temperature control requirements of the passenger compartment can be ensured while the battery is charged and pre-cooled, thereby improving the user's comfort and experience.

[0025] In some embodiments, the vehicle further includes: a battery precooling or preheating start-stop switch, wherein the battery precooling or preheating start-stop switch is connected to the controller and is used to control the start or stop of the battery precooling or preheating function.

[0026] In some embodiments, the battery thermal management system is connected to the air conditioning system via a plate changer, or the battery thermal management system is connected to the air conditioning system via a refrigerant pipeline.

[0027] In some embodiments, the vehicle further includes: a positioning system connected to the controller for obtaining the vehicle's location information and navigation mileage information.

[0028] In some embodiments, the controller includes: a vehicle controller, a battery management system, an intelligent driving controller and a body domain controller. The vehicle controller is connected to the battery management system and the body domain controller. The battery management system is also connected to the intelligent driving control. The body domain controller is connected to the battery thermal management system and the air conditioning system.

[0029] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 is a flow chart of a battery thermal management method according to one embodiment of the present invention; Figure 2 is a schematic diagram of a vehicle according to one embodiment of the present invention; Figure 3 is a flow chart of a battery thermal management method according to another embodiment of the present invention; Figure 4is a structural block diagram of an electronic device according to an embodiment of the present invention; Figure 5 is a structural block diagram of a vehicle according to an embodiment of the present invention.

[0031] Reference numerals: Vehicle 100; electronic device 90; Processor 1; memory 2; battery 3; battery thermal management system 4; air conditioning system 5; controller 6; battery pre-cooling start-stop switch 7; battery pre-heating start-stop switch 8; positioning system 9; compressor 51, valve body 52; fan 53; water pump 54; vehicle controller 61; intelligent driving controller 62; body domain controller 63; battery management system 64. DETAILED DESCRIPTION

[0032] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0033] The rapid development of the new energy vehicle industry has also significantly transformed the charging pile industry. Products are moving towards high-power fast charging, DC charging pile construction is accelerating, and the proportion of high-power charging continues to rise. Currently, the charging rates of new energy vehicles on the market generally range from 2C to 4C, with 4C fast charging technology becoming the mainstream choice for leading companies. High-rate charging systems, due to the high charging current and the inherent internal resistance of the battery, continuously generate high heat during charging, causing the battery temperature to rise rapidly.

[0034] In order to solve the above problems, an embodiment of the first aspect of the present invention provides a battery thermal management method, which can ensure the temperature control requirements of the passenger compartment while pre-cooling the battery during charging, thereby improving the user's comfort and experience.

[0035] Reference below Figure 1 The battery thermal management method according to an embodiment of the present invention is described as follows. Figure 1 As shown, the method at least includes: step S1-step S2.

[0036] Step S1: Determine whether the battery needs to be pre-cooled or pre-heated.

[0037] The pre-cooling requirement can include pre-cooling the battery during charging, or enabling pre-cooling to reduce battery temperature in extreme operating scenarios, on racetracks, or in off-road conditions to avoid power limitations caused by excessive battery temperature. The pre-heating requirement can include pre-heating the battery in low-temperature environments. The battery can be a power battery, which can be water-cooled, directly cooled, or in other forms.

[0038] Specifically, the vehicle controller collects the request instructions for pre-cooling or preheating in real time. When the user turns on the battery pre-cooling or preheating function through the function button on the vehicle computer, the vehicle controller collects the request instructions for pre-cooling or preheating, and the vehicle determines that the battery has pre-cooling or preheating requirements.

[0039] Step S2, controlling the rotation speed of the cooling power source for thermal management of the battery and the passenger compartment according to the battery pre-cooling or pre-heating requirements and the passenger compartment thermal management requirements, wherein the passenger compartment thermal management requirements have a higher priority than the battery pre-cooling or pre-heating requirements.

[0040] Among them, the thermal management requirements of the passenger compartment include cooling requirements and heating requirements.

[0041] In the example, for an ambient temperature of 38°C, a charging power of 350kW, and battery cooling only without air conditioning, the battery temperature rise rate was 1.13°C / min. At an initial battery temperature of 38°C, the charging current was limited after 1180 seconds. For an ambient temperature of 38°C, a charging power of 350kW, and both battery cooling and air conditioning activated, the temperature rise rate was 1.8°C / min. At an even lower initial battery temperature of 36°C, the charging current was limited after just 634 seconds. This shows that in hot summer weather, to ensure passenger comfort while maintaining air conditioning in the passenger compartment, a pre-cooling strategy for the battery is essential. To minimize charging current limiting, the initial battery temperature must be kept as low as possible.

[0042] Specifically, based on the consideration of the direct driving experience of the users in the passenger cabin, in order to avoid limiting the charging current due to the rapid temperature rise of the high-rate charging battery, thereby causing the battery charging time to be longer, the rate is the rate of current relative to the rated capacity of the battery during the charging or discharging process. In this application, the speed of the cooling power source used for thermal management of the battery and the passenger cabin is controlled according to the pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger cabin. That is to say, if it is determined that there are pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger cabin, the speed of the cooling power source is controlled to a high speed. At this time, the cooling power source provided at this speed can meet the thermal management or pre-cooling or preheating requirements of the passenger cabin. The thermal management of the passenger cabin is to make the air outlet channel temperature of the passenger cabin meet the set temperature, or the facial temperature or the cabin temperature meet the set temperature; if it is determined that there are pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger cabin If the vehicle's cabin thermal management needs are met, the speed of the cooling power source is controlled to a speed value that can provide the cooling required for the passenger compartment thermal management. If it is determined that there is a battery pre-cooling or preheating need, the speed of the cooling power source is controlled to a speed value that can provide the cooling required for the pre-cooling or preheating. In addition, when the cooling power source cannot simultaneously meet the passenger compartment thermal management needs and the battery pre-cooling or preheating needs, the passenger compartment thermal management needs should be prioritized. Therefore, in this application, the speed of the cooling power source is controlled based on the vehicle's required cooling capacity, so that when the cooling power source provides the cooling required for pre-cooling or preheating the battery, it also provides the cooling required for the passenger compartment thermal management needs. This ensures that the passenger compartment thermal management needs are met while pre-cooling the battery, thereby reducing the initial battery temperature at the beginning of charging, preventing the battery from overheating and current limiting during charging, and reducing the battery charging time. In addition, when the cooling power source is insufficient, the cooling required for the passenger compartment thermal management needs is prioritized, thereby pre-cooling the battery while prioritizing passenger compartment comfort.

[0043] According to the battery thermal management method of an embodiment of the present invention, the rotation speed of the cooling power source is controlled according to the pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger compartment, so as to meet the pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger compartment. Therefore, compared with the existing vehicle only performing pre-cooling action judgment, in this application, the rotation speed of the cooling power source is controlled by the cooling required by the vehicle, so that when the cooling power source provides the cooling required for pre-cooling or preheating to the battery, it also provides the cooling required for the thermal management requirements of the passenger compartment, thereby ensuring the thermal management requirements of the passenger compartment while charging and pre-cooling the battery, thereby improving the user's comfort and experience.

[0044] In some embodiments, the rotation speed of a cooling power source for thermal management of the battery and the passenger compartment is controlled based on the battery pre-cooling or pre-heating requirements and the passenger compartment thermal management requirements, including: determining that the current remaining power of the battery is the power that can be allocated to meet the battery pre-cooling or pre-heating requirements, and determining the current operating state of an air conditioning system that provides thermal management for the passenger compartment, wherein the air conditioning system is connected to the battery thermal management system, and the cooling power source includes a compressor of the air conditioning system, such as Figure 2 As shown, the air conditioning system 5 includes a compressor 53; the speed of the compressor is controlled according to the allocable power and the current operating state of the air conditioning system.

[0045] The compressor provides power input to the battery cooling system / air conditioning system and can be adjusted to different speeds to achieve varying cooling capacities. The battery's current remaining capacity refers to the battery's state of charge (SOC), representing the ratio of the battery's currently used energy to its total capacity.

[0046] New energy vehicle batteries are commonly cooled by water or refrigerant, with the cooling capacity coming from the air conditioning system. During pre-cooling or pre-heating, the battery draws some cooling capacity from the passenger compartment. This cooling capacity loss is more pronounced in extreme high-temperature conditions, impacting the driving experience.

[0047] In order to solve this problem, in the present application, the speed of the cooling power source used for thermal management of the battery and the passenger compartment is controlled by the pre-cooling or preheating requirements of the battery and the thermal management requirements of the passenger compartment. That is, the battery thermal management system calculates the current remaining power of the battery, determines the current remaining power of the battery as the power that can be allocated to meet the pre-cooling or preheating requirements of the battery, that is, determines that the current remaining power of the battery can meet the pre-cooling or preheating requirements of the battery, and determines the current operating state of the air-conditioning system that provides thermal management for the passenger compartment, wherein the current operating state can be an operating state and a stopped state, and then controls the speed of the compressor according to the allocable power and the current operating state of the air-conditioning system, that is, when the current remaining power of the battery can meet the pre-cooling or preheating requirements of the battery, and the current operating state of the air-conditioning system is an operating state, the cooling capacity that the air-conditioning system needs to provide can meet If there is a need for thermal management or pre-cooling or preheating of the passenger compartment, the speed of the compressor is controlled to be high, and the cooling capacity provided by the compressor at this speed can meet the thermal management or pre-cooling or preheating requirements of the passenger compartment; when the current remaining power of the battery can meet the pre-cooling or preheating requirements of the battery, and the current operating state of the air-conditioning system is stopped, the cooling capacity provided by the air-conditioning system only needs to meet the pre-cooling or preheating requirements, then the speed of the compressor is controlled to be low, and the cooling capacity provided by the compressor at this speed can meet the pre-cooling or preheating requirements. Therefore, in this application, the speed of the compressor is controlled by the power that can be allocated for pre-cooling or preheating requirements and the current operating state, so as to ensure that the current remaining power of the battery can meet the battery pre-cooling or preheating requirements, avoid the vehicle from being paralyzed due to battery exhaustion during driving, and ensure the thermal management requirements of the passenger compartment, thereby improving the user's comfort and experience.

[0048] In addition, if the current remaining power of the battery cannot meet the power consumed by the battery pre-cooling or pre-heating requirement, the battery pre-cooling or pre-heating requirement is canceled.

[0049] In some embodiments, determining the current remaining power of the battery as the amount of power that can be allocated to meet the pre-cooling or preheating requirements of the battery includes: determining a target gear at which the current remaining power of the battery meets the pre-cooling or preheating requirements of the battery, the gear at which the current remaining power of the battery meets the pre-cooling or preheating requirements of the battery is positively correlated with the amount of power that can be allocated, and the gear is positively correlated with the amount of cooling provided for pre-cooling or preheating of the battery.

[0050] Specifically, since the higher the gear level of the battery pre-cooling or preheating demand, the higher the cooling capacity required for battery pre-cooling or preheating, that is, the gear level is positively correlated with the cooling capacity of the battery pre-cooling or preheating, the higher the speed of the compressor, the higher the amount of electricity that can be allocated to the battery pre-cooling or preheating demand. Therefore, it can be seen that the gear level at which the battery's current remaining power meets the battery's pre-cooling or preheating demand is positively correlated with the amount of electricity that can be allocated.

[0051] In an embodiment, the battery thermal management system determines whether the current remaining power of the battery meets the power consumed by the target gear position for the pre-cooling or pre-heating requirements of the battery. If so, the pre-cooling or pre-heating function of the battery is turned on. If the current remaining power of the battery cannot meet the power consumed by the target gear position for the pre-cooling or pre-heating requirements of the battery, the pre-cooling or pre-heating requirements of the battery are canceled.

[0052] In some embodiments, determining a target gear position at which the current remaining battery charge meets the battery pre-cooling or pre-heating requirements includes: determining the power consumption required for each battery pre-heating or pre-cooling gear position based on the navigation mileage information of the vehicle arriving at the destination; determining a pre-selected gear position at which the current remaining battery charge meets the power consumption; and the target gear position is the gear with the highest power consumption among the pre-selected gear positions.

[0053] Specifically, the navigation mileage information of the destination is obtained using the vehicle's navigation system, and the power consumption required for each battery preheating or precooling gear under the navigation mileage information is determined. A preliminary gear is determined that satisfies the power consumption at the battery's current remaining charge. Each battery preheating or precooling gear whose power consumption is lower than the battery's current remaining charge is selected as the preliminary gear, and the gear with the highest power consumption among the preliminary gears is selected as the target gear. Thus, in this application, different cooling gears are used for precooling according to the battery's current remaining charge. While ensuring that the vehicle reaches the destination, the gear with the highest power consumption is selected to provide the power required for precooling or preheating, thereby maximizing battery safety and lifespan, thereby preventing the battery from overheating and current limiting during charging, and further reducing charging time.

[0054] In some embodiments, the compressor speed is controlled based on the available power and the current operating state of the air conditioning system, including: when the target gear is a first-type gear and the air conditioning system is in operation, the target gear is switched to a second-type gear; wherein the first-type gear is a gear whose corresponding battery pre-cooling or pre-heating cooling capacity exceeds a cooling capacity threshold, and the second-type gear is a gear whose corresponding battery pre-cooling or pre-heating cooling capacity is below the cooling capacity threshold. The second-type gear is lower than the first-type gear.

[0055] Specifically, when the refrigeration system provides cooling capacity to the passenger compartment and the battery for pre-cooling or preheating at the same time, the cooling capacity of the passenger compartment is prioritized. Based on this, when the target gear for the pre-cooling or preheating requirement of the battery is the first type of gear, that is, the cooling capacity of the battery for pre-cooling or preheating corresponding to the target gear is higher than the cooling capacity threshold, wherein the cooling capacity threshold is the maximum value of the cooling capacity provided by the refrigeration system for pre-cooling or preheating. At this time, in order to ensure the cooling demand of the passenger compartment, the refrigeration system cannot provide the corresponding cooling capacity for the target gear for pre-cooling or preheating, then the target gear is switched to the second type of gear, that is, the target gear is adjusted to a gear where the cooling capacity of the battery for pre-cooling or preheating is lower than the cooling capacity threshold, thereby providing the cooling capacity required for pre-cooling or preheating on the basis of ensuring the temperature control demand of the passenger compartment.

[0056] In some embodiments, before the target gear is switched to the second type gear, the battery thermal management method further includes: determining that the ambient temperature exceeds a temperature threshold range.

[0057] For example, if it is determined that the battery has a pre-cooling requirement, when the ambient temperature exceeds the temperature threshold range, for example, the ambient temperature exceeds 38°C, the ambient temperature is too high, resulting in the refrigeration system providing the passenger compartment with a cooling capacity that cannot reduce the passenger compartment temperature. At this time, the air temperature at the passenger compartment outlet is stable at 30°C, which seriously affects the comfort in the passenger compartment. In this case, the target gear is not adjusted to the first type of gear, but is switched to the second type of gear; if it is determined that the battery has a preheating requirement, and the ambient temperature is lower than the temperature threshold, in this case, the ambient temperature is too low, resulting in the refrigeration system providing the passenger compartment with a cooling capacity that cannot increase the passenger compartment temperature. In this case, the target gear is not adjusted to the first type of gear, but is switched to the second type of gear. Therefore, in this application, the target gear is adjusted according to the ambient temperature, thereby prioritizing ensuring that the temperature of the passenger compartment meets the cooling or heating requirements.

[0058] In some embodiments, the speed of the compressor is controlled according to the allocable power and the current operating state of the air-conditioning system, including: when the target gear is the first type gear and the air-conditioning system is not in operation, the speed of the compressor is controlled according to the target gear.

[0059] Specifically, when the target gear is the first gear and the air conditioning system is not operating, although the cooling capacity required for the target gear is greater than the cooling capacity threshold, there is no cooling demand in the passenger compartment. In other words, the refrigeration system only needs to meet the cooling capacity required for pre-cooling or pre-heating the battery corresponding to the target gear. The compressor speed is then controlled based on the target gear to ensure that the compressor provides the cooling capacity required for the target gear. Therefore, when there is no cooling demand in the passenger compartment, the refrigeration system in this application meets the cooling capacity corresponding to the first gear, thereby largely meeting the cooling or heating needs of the battery.

[0060] In some embodiments, the speed of the compressor is controlled based on the allocable power and the current operating status of the air-conditioning system, including: when the target gear is the second type of gear and the compressor is at the maximum allowable operating speed of the compressor, the pre-cooling or preheating request of the target gear is temporarily not responded to; until the passenger compartment temperature reaches a second temperature threshold, the speed of the compressor and the valve opening of the air-conditioning system are controlled according to the target gear.

[0061] The second temperature threshold can be an optimal temperature threshold set based on the passenger compartment's required cooling or heating temperature. Valve bodies in air conditioning systems include electronic expansion valves, throttle valves, two-way electronic expansion valves, one-way valves, and solenoid valves. Valve bodies can also be various valves in battery cooling systems, including electronic expansion valves, throttle valves, two-way electronic expansion valves, one-way valves, and solenoid valves.

[0062] Specifically, when the target gear is the second gear and the compressor is at the maximum allowable operating speed of the compressor, that is, the cooling capacity of the battery pre-cooling or preheating corresponding to the target gear is lower than the cooling capacity threshold, the refrigeration system can provide cooling capacity corresponding to the second gear for pre-cooling or preheating. However, the cooling capacity generated by the compressor in the refrigeration system is all used for cooling or heating the passenger compartment, and there is no excess cooling capacity to provide for battery pre-cooling or preheating. At this time, if the refrigeration system allocates cooling capacity for battery pre-cooling or preheating, it will not be able to meet the cooling or heating needs of the passenger compartment, resulting in occupants If the cabin temperature is extremely high or low, affecting the comfort of the passenger compartment, the refrigeration system temporarily does not respond to the pre-cooling or pre-heating request for the target gear. That is, the refrigeration system temporarily does not provide cooling capacity for pre-cooling or pre-heating the battery, but only provides cooling capacity for the passenger compartment until the passenger compartment temperature reaches a second temperature threshold. At this point, it indicates that the passenger compartment temperature has met the cooling or heating requirements. At this point, the refrigeration system can respond to the pre-cooling or pre-heating request for the target gear, controlling the compressor speed and the valve opening of the air conditioning system according to the target gear so that the air conditioning system provides the cooling capacity corresponding to the target gear for pre-cooling or pre-heating. Therefore, in this application, when the refrigeration system provides all the cooling capacity for cooling or heating the passenger compartment, it does not provide the cooling capacity corresponding to the target gear, thereby preventing the passenger compartment comfort from being affected by extremely high or low cabin temperatures and improving the user experience.

[0063] In addition, it should be noted that when controlling the speed of the compressor and the valve opening of the air-conditioning system according to the target gear, the cooling capacity provided by the refrigeration system can be controlled to decrease, or the maximum allowable operating speed can be maintained, and the valve opening of the air-conditioning system can be adjusted up or down, on the basis of satisfying the passenger compartment temperature reaching the second temperature threshold and the cooling capacity corresponding to the target gear, and there is no specific restriction on this.

[0064] In an embodiment, when the target gear is the second type of gear and the fan or compressor of the air-conditioning system has a full duty cycle, the pre-cooling or preheating request of the target gear will not be responded to temporarily until the passenger compartment temperature reaches the second temperature threshold. The speed of the fan or compressor is controlled according to the target gear, and the valve opening and water pump of the air-conditioning system are adjusted at the same time.

[0065] In some embodiments, the speed of the compressor is controlled based on the allocable power and the current operating status of the air-conditioning system, and also includes: when the target gear is the second gear and the compressor is not at the maximum allowable operating speed of the compressor, the speed of the compressor and the valve opening of the air-conditioning system are controlled according to the target gear.

[0066] Specifically, when the target gear is the second gear and the compressor is not at the maximum allowable operating speed of the compressor, that is, the cooling capacity of the battery pre-cooling or preheating corresponding to the target gear is lower than the cooling capacity threshold, at this time the refrigeration system can be pre-cooling or preheating corresponding to the cooling capacity of the second gear, and the cooling capacity generated by the compressor in the refrigeration system is not all used for cooling or heating the passenger compartment, and there is excess cooling capacity provided for battery pre-cooling or preheating, then in response to the pre-cooling or preheating request of the target gear, the speed of the compressor and the valve body opening of the air-conditioning system are controlled according to the target gear, so that the cooling capacity provided by the air-conditioning system meets the passenger compartment, and the cooling capacity corresponding to the target gear is provided for pre-cooling or preheating.

[0067] For example, when controlling the compressor speed and the valve opening of the air-conditioning system according to the target gear, the compressor speed is controlled to slowly increase to the maximum allowable operating speed of the compressor, and at the same time, the valve opening of the air-conditioning system is lowered or raised, so that the cooling capacity provided by the air-conditioning system meets the passenger compartment, and the cooling capacity corresponding to the target gear is provided for pre-cooling or preheating.

[0068] In an embodiment, Figure 2 As shown, the air conditioning system 5 includes a valve body 52, a water pump 54, a fan 53, and a compressor 21. Based on this, when the target gear is the second type gear and the air conditioning system's fan or compressor is not at full duty cycle, the fan or compressor speed is gradually increased according to the target gear to meet the heating / cooling demand and pre-cooling or pre-heating demand or full duty cycle, responding to the pre-cooling or pre-heating request of the target gear. The valve body opening and water pump of the air conditioning system are also adjusted. The water pump provides power input for the separate circulation of the water-cooled battery pack, while the fan is used to power the front cabin cooling air. By adjusting the fan speed, the air flow rate of the condenser in the air conditioning system can be controlled in stages.

[0069] In some embodiments, if it is determined that the current remaining battery charge meets the requirements for the vehicle to reach the destination, the vehicle maintains pre-cooling or pre-heating of the battery; or, if it is determined that the current remaining battery charge does not meet the requirements for the vehicle to reach the destination, pre-cooling or pre-heating of the vehicle is stopped.

[0070] Specifically, pre-cooling or pre-heating the battery before charging can avoid the problem of charging current being limited, thereby improving the battery charging efficiency. Based on this, if it is determined that the current remaining power of the battery meets the needs of the vehicle to reach the destination, and the current remaining power of the battery can support the vehicle to reach the destination, the vehicle will maintain pre-cooling or preheating of the battery to ensure that the vehicle can smoothly reach the destination. In addition, if the destination is a charging pile, it can ensure that the vehicle can smoothly reach the destination and avoid the problem of charging current being limited, thereby improving the battery charging efficiency; or, if it is determined that the current remaining power of the battery does not meet the needs of the vehicle to reach the destination, and the current remaining power of the battery cannot support the vehicle to reach the destination, therefore, in order to give priority to meeting the needs of the vehicle to reach the destination, the pre-cooling or preheating of the vehicle is stopped, thereby avoiding power consumption so that the vehicle can reach the destination.

[0071] In some embodiments, when the vehicle arrives at the destination or receives an operation instruction to cancel battery precooling or preheating, the vehicle stops the battery precooling or preheating process.

[0072] Specifically, when the vehicle arrives at the destination, where a charging station is available, it means that the vehicle is about to be charged or parked for a long time without the need to turn on cooling or heating. At this time, if the battery continues to be pre-cooled or preheated, additional electricity will be consumed, so the vehicle is controlled to stop the pre-cooling or preheating program for the battery, thereby reducing unnecessary energy consumption; or, when the user actively turns off the battery pre-cooling or preheating function through one-button pre-cooling or one-button preheating, the vehicle receives an operation instruction to cancel the battery pre-cooling or preheating, so the vehicle is controlled to stop the pre-cooling or preheating program for the battery. Therefore, the present application allows users to turn off the pre-cooling or preheating function by themselves, which can improve the user experience and the convenience of controlling the pre-cooling or preheating function.

[0073] In an embodiment, the current remaining battery power is determined in real time during the pre-cooling process to ensure that the vehicle does not run out of power and become paralyzed when the user takes a detour or other unpredictable situations.

[0074] In an embodiment, the pre-cooling or pre-heating function of the battery can be activated only when the air outlet duct temperature of the passenger compartment meets the set temperature, or the facial temperature of the passenger compartment or the temperature inside the cabin meets the set temperature.

[0075] Reference below Figure 3 The battery thermal management method according to an embodiment of the present invention is illustrated by way of example, and the specific contents are as follows.

[0076] Step S3, start.

[0077] Step S4: The vehicle controller collects the pre-cooling or pre-heating requirements of the battery.

[0078] In step S5, the battery management system (BMS) collects navigation mileage information and calculates the power consumption corresponding to the cooling capacity of different gears based on the current remaining battery power and power consumption.

[0079] In step S6, the battery management system determines whether the current remaining power of the battery meets the power consumption of the cooling capacity corresponding to the gear position. If so, execute steps S7, S11 and S13; otherwise, execute step S23.

[0080] Step S7: If the gear position is third gear, execute step S8.

[0081] Step S8, determining whether the user turns on the air conditioner, if so, executing step S14, otherwise executing step S9.

[0082] Step S9: The battery management system sends a third-level pre-cooling or pre-heating request to the vehicle controller.

[0083] In step S10, the vehicle controller sends a battery pre-cooling or pre-heating instruction, and the right body controller adjusts the compressor / blower speed, and then executes step S19.

[0084] Step S11: If the gear position is first gear, execute step S12.

[0085] In step S12, the battery management system sends a pre-cooling or pre-heating request to the vehicle controller, and then executes step S15.

[0086] Step S13: If the gear position is second gear, execute step S14.

[0087] In step S14, the battery management system sends a second-gear pre-cooling or pre-heating request to the vehicle controller, and then executes step S15.

[0088] Step S15: The vehicle controller receives the pre-cooling or pre-heating request and sends control instructions for the fan, compressor, and expansion valve to the right vehicle body controller.

[0089] Step S16, determining whether the compressor / fan has a full duty cycle, if so, executing step S17, otherwise executing step S18.

[0090] In step S17, the target requirements of the air-conditioning channel are met first, that is, the cooling or heating requirements of the passenger compartment are met first, and then the battery is pre-cooled or pre-heated, and step S19 is executed.

[0091] In step S18, the battery pre-cooling or pre-heating is started, the right vehicle body controller increases the speed of the compressor and the fan, adjusts the valve body opening, and executes step S19.

[0092] In step S19, the battery management system determines whether the current remaining power of the battery meets the requirements for the vehicle to reach the destination. If so, step S20 is executed; otherwise, step S23 is executed.

[0093] Step S20: The right vehicle body controller maintains pre-cooling or pre-heating to the destination.

[0094] Step S21, determining whether the vehicle has arrived at the destination or whether the user has turned off the pre-cooling or pre-heating function, if so, executing step S22, otherwise executing step S20.

[0095] Step S22: The battery management system stops sending pre-cooling requests, and the battery cooling is under normal logic control.

[0096] Step S23, end.

[0097] In the embodiment, when the ambient temperature is 38°C, when the battery starts the third-speed cooling, the air-conditioning air volume and the cooling gear are adjusted to the lowest, and the wind temperature at the passenger compartment outlet is stabilized at 30°C, which seriously affects the comfort in the passenger compartment, especially the experience of the rear passengers is more obvious. Therefore, when there is a cooling demand in the passenger compartment in summer, the third gear should be avoided to pre-cool the battery.

[0098] A second aspect of the present invention provides an electronic device, such as Figure 4 As shown, the electronic device 90 includes: at least one processor 1 and a memory 2 communicatively connected to the at least one processor 1 .

[0099] The memory 2 stores a computer program that can be executed by at least one processor 1 , and the battery thermal management method of the above embodiment is implemented when the at least one processor 1 executes the computer program.

[0100] It should be noted that the specific implementation method of the electronic device in the embodiment of the present invention is similar to the specific implementation method of the battery thermal management method in any of the above embodiments of the present invention. For details, please refer to the description of the method part. In order to reduce redundancy, it will not be repeated here.

[0101] According to the electronic device of the embodiment of the present invention, by executing the battery thermal management method of the above embodiment, the temperature control requirements of the passenger compartment can be ensured while the battery is being charged and pre-cooled, thereby improving the user's comfort and experience.

[0102] A third aspect of the present invention provides a non-volatile readable storage medium having a computer program stored thereon, wherein the battery thermal management method of the above embodiment is implemented when the computer program is executed.

[0103] A fourth aspect of the present invention provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the battery thermal management method of the above embodiment.

[0104] A fifth embodiment of the present invention provides a vehicle 100, such as Figure 2 and Figure 5 As shown, it includes: a battery 3, a battery thermal management system 4, an air conditioning system 5 that provides thermal management for the passenger compartment, and a controller 6.

[0105] Among them, the air-conditioning system 5 is connected to the battery thermal management system 4, and the air-conditioning system includes a cold power source that provides thermal management for the battery and the passenger compartment; the controller 6 is connected to the battery thermal management system 4 and the air-conditioning system 5, and is used to execute the battery thermal management method of the above embodiment.

[0106] Among them, the battery thermal management system can collect the battery's charging and discharging voltage, current, and battery temperature in real time, receive and transmit signal instructions, and calculate the battery's current remaining power and power consumption information.

[0107] It should be noted that the specific implementation method of the vehicle in the embodiment of the present invention is similar to the specific implementation method of the battery thermal management method in any of the above embodiments of the present invention. Please refer to the description of the method section for details. In order to reduce redundancy, it will not be repeated here.

[0108] According to the vehicle of the embodiment of the present invention, by executing the battery thermal management method of the above embodiment, the temperature control requirements of the passenger compartment can be ensured while the battery is charged and pre-cooled, thereby improving the user's comfort and experience.

[0109] In some embodiments, as Figure 2 As shown, the vehicle 100 further includes: a battery precooling start-stop switch 7 or a battery preheating start-stop switch 8 , which is connected to the controller and is used to control the start or stop of the battery precooling or preheating function.

[0110] For example, the battery precooling start / stop switch can be a one-touch precooling function, or the preheating start / stop switch can be a one-touch preheating function. The vehicle controller collects precooling or preheating request instructions in real time. When the user activates the battery precooling or preheating function via the one-touch precooling or preheating function on the vehicle computer, the vehicle controller collects the precooling or preheating request instruction, and the vehicle determines that the battery needs precooling or preheating. The one-touch precooling or preheating function can be implemented using a touch button, a physical button, a toggle switch or knob, or other possible virtual or physical structures.

[0111] In some embodiments, the battery thermal management system is connected to the air conditioning system via a plate changer, or the battery thermal management system is connected to the air conditioning system via a refrigerant pipeline.

[0112] In some embodiments, as Figure 2 As shown, the vehicle 100 further includes a positioning system 9 .

[0113] The positioning system 9 is connected to the controller and is used to obtain the vehicle's position information and navigation mileage information. The positioning system 9 can be a high-precision positioning system that is used to collect the vehicle's position information and navigation mileage information in real time.

[0114] In some embodiments, the controller 6 includes: a vehicle controller 61, a battery management system 64, an intelligent driving controller (Mobile Data Center, MDC) 62 and a body domain controller 63. The vehicle controller 61 is connected to the battery management system 64 and the body domain controller 63. The battery management system 64 is also connected to the intelligent driving controller 62. The body domain controller 63 is connected to the battery thermal management system 4 and the air conditioning system 5.

[0115] Among them, the vehicle controller can judge various signal requests on the vehicle, receive the driver's operation command signals and transmit the commands to each controller. The intelligent driving controller is used to receive and transmit the vehicle's positioning, destination information and mileage information. The body domain controller can receive action commands from the vehicle controller, send command signals to the battery cooling system or air conditioning system, and can communicate signals with the battery thermal management system. The battery management system 64 receives navigation mileage information from the intelligent driving controller 62 in real time, and calculates the power consumption required for cooling at different gears based on the current remaining battery power and power consumption. The body domain controller includes the right body domain controller, which can be other controllers or devices, or other structures that can achieve signal transmission and action execution.

[0116] In an embodiment, the air-conditioning system may be a battery cooling system, and the air-conditioning system may be implemented in different forms. For a battery cooling system that is a water-cooled battery system, the battery cooling system is an independent system and interacts with the air-conditioning system. For a direct-cooled battery system, the air-conditioning system is the battery cooling system.

[0117] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0118] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A battery thermal management method, characterized in that: include: Determine whether the battery needs to be pre-cooled or pre-heated; The rotation speed of a cooling power source for thermal management of the battery and the passenger compartment is controlled according to the pre-cooling or pre-heating requirement of the battery and the thermal management requirement of the passenger compartment, wherein the thermal management requirement of the passenger compartment has a higher priority than the pre-cooling or pre-heating requirement of the battery.

2. The battery thermal management method according to claim 1, characterized in that: According to the pre-cooling or pre-heating requirements of the battery and the thermal management requirements of the passenger compartment, the speed of a cooling power source for thermal management of the battery and the passenger compartment is controlled, including: determining that the current remaining charge of the battery is an amount of charge that can be allocated to meet pre-cooling or pre-heating requirements of the battery, and determining a current operating state of an air conditioning system that provides thermal management for the passenger compartment, wherein the air conditioning system is connected to the battery thermal management system, and the cooling power source includes a compressor of the air conditioning system; The rotation speed of the compressor is controlled according to the allocable power and the current operating state of the air-conditioning system.

3. The battery thermal management method according to claim 2, characterized in that: Determining whether the current remaining power of the battery is the power that can be allocated to meet the pre-cooling or pre-heating requirements of the battery includes: Determine a target gear at which the current remaining power of the battery meets the pre-cooling or preheating requirements of the battery, the gear at which the current remaining power of the battery meets the pre-cooling or preheating requirements of the battery is positively correlated with the allocable power, and the gear is positively correlated with the cooling capacity of the battery for pre-cooling or preheating.

4. The battery thermal management method according to claim 3, characterized in that: The determining of the target gear position at which the current remaining power of the battery meets the pre-cooling or pre-heating requirement of the battery includes: Determine the power consumption required for each battery preheating or precooling gear based on the navigation mileage information of the vehicle to reach the destination; Determining that the current remaining power of the battery meets the initially selected power level of the power consumption; The target gear is the gear with the highest power consumption among the initially selected gears.

5. The battery thermal management method according to claim 3, characterized in that: Controlling the speed of the compressor according to the allocable power and the current operating state of the air-conditioning system includes: When the target gear is a first-category gear and the air conditioning system is in operation, the target gear is switched to a second-category gear; Among them, the first type of gear is that the cooling capacity of the pre-cooling or pre-heating of the battery corresponding to the gear is higher than the cooling capacity threshold, and the second type of gear is that the cooling capacity of the pre-cooling or pre-heating of the battery corresponding to the gear is lower than the cooling capacity threshold.

6. The battery thermal management method according to claim 5, characterized in that: Before the target gear is switched to the second type gear, the battery thermal management method further includes: determining that the ambient temperature exceeds a temperature threshold range.

7. The battery thermal management method according to claim 5, characterized in that: Controlling the speed of the compressor according to the allocable power and the current operating state of the air-conditioning system includes: When the target gear is the first type of gear and the air conditioning system is not in operation, the speed of the compressor is controlled according to the target gear.

8. The battery thermal management method according to claim 5, characterized in that: Controlling the speed of the compressor according to the allocable power and the current operating state of the air-conditioning system includes: When the target gear is the second type gear and the compressor is at the maximum allowable operating speed of the compressor, temporarily not responding to the pre-cooling or pre-heating request of the target gear; Until the passenger compartment temperature reaches a second temperature threshold, the speed of the compressor and the valve opening of the air-conditioning system are controlled according to the target gear.

9. The battery thermal management method according to claim 5, characterized in that: Controlling the speed of the compressor according to the allocable power and the current operating state of the air conditioning system further includes: When the target gear is the second type gear and the compressor is not at the maximum allowable operating speed of the compressor, the speed of the compressor and the valve opening of the air-conditioning system are controlled according to the target gear.

10. The battery thermal management method according to any one of claims 5 to 8, characterized in that: The battery thermal management method further includes: Determining whether the current remaining power of the battery satisfies the vehicle's requirements for reaching the destination, and maintaining pre-cooling or pre-heating of the battery by the vehicle; Alternatively, it is determined that the current remaining power of the battery does not meet the requirements for the vehicle to reach the destination, and pre-cooling or pre-heating of the vehicle is stopped.

11. The battery thermal management method according to any one of claims 5 to 8, characterized in that: The battery thermal management method further includes: When the vehicle arrives at a destination or receives an operation instruction to cancel battery precooling or preheating, the vehicle stops the precooling or preheating procedure for the battery.

12. An electronic device, characterized in that: include: at least one processor; a memory communicatively coupled to the at least one processor; The memory stores a computer program that can be executed by the at least one processor, and when the at least one processor executes the computer program, the battery thermal management method according to any one of claims 1 to 11 is implemented.

13. A non-volatile readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the battery thermal management method according to any one of claims 1 to 11 is implemented.

14. A computer program product, characterized in that The computer program product includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute the battery thermal management method according to any one of claims 1 to 11.

15. A vehicle, characterized in that: include: Battery; A battery thermal management system and an air conditioning system for providing thermal management for the passenger compartment, the air conditioning system being connected to the battery thermal management system, the air conditioning system including a cooling power source for providing thermal management for the battery and the passenger compartment; A controller connected to the battery thermal management system and the air conditioning system, and configured to execute the battery thermal management method according to any one of claims 1 to 11.

16. The vehicle according to claim 15, characterized in that The vehicle further comprises: A battery precooling or preheating start-stop switch is connected to the controller and is used to control the start or stop of the battery precooling or preheating function.

17. The vehicle according to claim 15, characterized in that The battery thermal management system is connected to the air conditioning system via a plate changer, or the battery thermal management system is connected to the air conditioning system via a refrigerant pipeline.

18. The vehicle according to claim 15, characterized in that The vehicle further comprises: The positioning system is connected to the controller and is used to obtain the vehicle's location information and navigation mileage information.

19. The vehicle according to claim 15, characterized in that The controller includes: The vehicle controller, battery management system, intelligent driving controller and body domain controller are connected to the battery management system and the body domain controller. The battery management system is also connected to the intelligent driving controller. The body domain controller is connected to the battery thermal management system and the air conditioning system.

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