Control method of vehicle battery charging cooling system and related equipment

Abstract

The invention discloses a control method of a vehicle battery charging cooling system and related equipment, and relates to the technical field of battery charging, the method comprises the following steps: when a vehicle is in charging connection with a charging pile, establishing physical butt joint between a vehicle side bidirectional stop valve and a charging pile side bidirectional stop valve; acquiring current temperature data of the target battery; based on the current temperature data, determining a cooling demand of the target battery; based on the cooling requirement, the whole vehicle air conditioning system is controlled to refrigerate a first cooling flow channel; when the refrigerating capacity of the whole vehicle air conditioning system cannot meet the cooling requirement, a vehicle side two-way stop valve and a charging pile side two-way stop valve are controlled to be opened so as to communicate a second cooling flow channel with the charging pile air conditioning system; and based on the cooling requirement, the charging pile air conditioning system is controlled to refrigerate the second cooling flow channel.

Description

Technical Field

[0001] This application relates to the field of battery charging technology, and in particular to a control method and related equipment for a vehicle battery charging cooling system. Background Technology

[0002] With the rapid development of fast charging technology for electric vehicles, battery charging rates are advancing from the current 5C to 6C and even 10C. This increase in charging rate leads to a huge transient heat load on the battery during charging, placing extremely high demands on the vehicle's thermal management system. For example, 5C fast charging may require approximately 11kW of cooling capacity, while 10C fast charging may require 30kW or even higher. Installing a high-power compressor cooling system capable of meeting these peak demands in every vehicle would present practical challenges such as severely limited space in the front compartment and a dramatic increase in vehicle cost and weight. Furthermore, the large cooling system configured to handle the occasional extreme fast charging heat dissipation operates at overcapacity under most driving conditions, resulting in wasted resources. Therefore, a control method for the vehicle battery charging cooling system is urgently needed to solve the heat dissipation problem caused by ultra-high charging rates within the limited vehicle space and cost. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solutions, nor is it intended to define the scope of protection of the claimed technical solutions.

[0004] In a first aspect, this application provides a control method for a vehicle battery charging cooling system. The battery charging cooling system includes a battery thermal management system, a vehicle air conditioning system, and a vehicle-side bidirectional shut-off valve installed in the vehicle; and a charging pile-side bidirectional shut-off valve and a charging pile air conditioning system installed in the charging pile. The battery thermal management system includes a first cooling channel through which a first cooling medium is introduced and a second cooling channel through which a second cooling medium is introduced, comprising: When the vehicle is connected to the charging pile for charging, a physical connection is established between the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve. Obtain the current temperature data of the target battery; Based on the current temperature data, determine the cooling requirements of the target battery; Based on the cooling requirements, the vehicle air conditioning system is controlled to cool the first cooling channel. When the cooling capacity of the vehicle air conditioning system cannot meet the cooling demand, the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve are opened to connect the second cooling channel with the charging pile air conditioning system. Based on the cooling requirements, the charging pile air conditioning system is controlled to cool the second cooling channel.

[0005] In some embodiments, the heat exchange efficiency of the first cooling medium is greater than that of the second cooling medium, the first cooling channel corresponds to the central region of the target battery, and the second cooling channel corresponds to the peripheral region of the target battery.

[0006] In some implementations, determining the cooling requirements of the target battery based on the current temperature data includes: Based on the current temperature data, the current highest temperature of the target battery is determined, where the current highest temperature is the sampled value with the largest value among the multiple cell temperature sampled values ​​included in the current temperature data. The cooling requirement is determined based on the current highest temperature and the first preset temperature threshold.

[0007] In some implementations, controlling the vehicle air conditioning system to cool the first cooling channel based on the cooling demand includes: Based on the cooling requirements, the first target temperature data and the first target flow rate data of the first cooling channel are determined; Based on the first target temperature data and the first target flow rate data, the vehicle air conditioning system is controlled to cool the first cooling medium in the first cooling channel.

[0008] In some embodiments, controlling the charging pile air conditioning system to cool the second cooling channel based on the cooling demand includes: Based on the cooling requirements, determine the second target temperature data and the second target flow rate data for the second cooling channel; Based on the second target temperature data and the second target flow rate data, the charging pile air conditioning system is controlled to cool the second cooling medium in the second cooling channel.

[0009] In some embodiments, after controlling the charging pile air conditioning system to cool the second cooling channel based on the cooling demand, the method further includes: Obtain the temperature of the central region and the temperature of the surrounding region of the target battery; The temperature difference of the target battery is calculated based on the temperature of the central region and the temperature of the surrounding region. When the temperature difference is greater than or equal to the second preset temperature threshold, a first adjustment parameter for the first cooling medium and a second adjustment parameter for the second cooling medium are determined; wherein, the first adjustment parameter is to increase the flow rate of the first cooling medium or decrease the temperature of the first cooling medium, and the second adjustment parameter is to increase the temperature of the second cooling medium or decrease the flow rate of the second cooling medium; Based on the first adjustment parameter, the vehicle air conditioning system is controlled to perform cooling operation on the first cooling channel; Based on the second adjustment parameter, the cooling operation of the charging pile air conditioning system on the second cooling channel is controlled.

[0010] In some implementations, it also includes: Obtain the current charging state data of the target battery; Based on the current temperature data and the current charging status data, the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve are controlled to close, and the charging pile air conditioning system is controlled to stop operating.

[0011] In some implementations, the cooling requirement includes the temperature of the cooling medium and the flow rate of the cooling medium.

[0012] Secondly, this application proposes a vehicle battery charging and cooling system, comprising: Battery thermal management system, vehicle air conditioning system, vehicle-side bidirectional shut-off valve, charging pile-side bidirectional shut-off valve and charging pile air conditioning system; The battery thermal management system includes a first cooling channel through which a first cooling medium is introduced and a second cooling channel through which a second cooling medium is introduced. The battery thermal management system is used to acquire the current temperature data of the target battery and determine the cooling requirements of the target battery based on the current temperature data. The vehicle air conditioning system is used to cool the first cooling channel based on the cooling demand; The vehicle-side bidirectional shut-off valve is used to establish a physical connection with the charging pile-side bidirectional shut-off valve when the vehicle is connected to the charging pile for charging, and to open when the cooling capacity of the vehicle air conditioning system cannot meet the cooling requirements. The charging pile side bidirectional shut-off valve is used to establish a physical connection with the vehicle side bidirectional shut-off valve when the vehicle is connected to the charging pile for charging, and to open when the cooling capacity of the vehicle air conditioning system cannot meet the cooling demand. The charging pile air conditioning system is used to cool the second cooling channel based on the cooling demand after the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve are opened.

[0013] Thirdly, this application proposes a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the control method of the vehicle battery charging and cooling system according to any one of the first aspects.

[0014] Fourthly, this application proposes a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for the vehicle battery charging and cooling system according to any one of the first aspects.

[0015] In summary, the control method for the vehicle battery charging cooling system provided in this application establishes a physical connection between the vehicle-side and charging pile-side bidirectional shut-off valves when the vehicle is connected to the charging pile, providing a physical connection basis for the coordinated flow of the cooling medium. By acquiring the current temperature data of the target battery and determining the cooling requirements based on this, the method realizes the perception of the battery's thermal state and the generation of cooling requirements. By first controlling the vehicle's air conditioning system to cool the first cooling channel through which the first cooling medium flows, the method prioritizes utilizing the vehicle's own cooling capacity to cope with the initial and low-to-medium load heat dissipation requirements, improving the timeliness and energy efficiency of the system response. When it is detected that the cooling capacity of the vehicle's air conditioning system cannot meet the cooling requirements, the method controls the opening of the bidirectional shut-off valve to connect the second cooling channel through which the second cooling medium flows with the charging pile's air conditioning system, and controls the charging pile's air conditioning system to cool the second cooling channel based on the cooling requirements. This creatively uses the cooling capacity of the charging pile as a supplement to the vehicle's cooling system, thereby effectively solving the problem of insufficient vehicle cooling capacity caused by the rapid increase in battery heat generation power in super-fast charging scenarios for electric vehicles without significantly increasing the cost per vehicle or space occupation. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit this specification. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic flowchart of a control method for a vehicle battery charging and cooling system provided in an embodiment of this application. Figure 2 This is a schematic diagram of the cold plate cooling channel layout structure provided in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram of a vehicle battery charging and cooling system provided in an embodiment of this application. Detailed Implementation

[0018] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. 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.

[0019] This application is primarily applied to the field of pure electric or hybrid vehicles that support high-rate and even super-fast charging. With the easing of range anxiety in electric vehicles, users have an urgent need for faster charging speeds, and the charging rate of power batteries is rapidly advancing from the current mainstream 1C-2C to 4C, 5C, and even the laboratory-scale 6C and 10C. This ultra-high-power charging can replenish a large amount of electrical energy within minutes to tens of minutes, but it also leads to a geometric increase in the heat generation power inside the battery, generating extremely high instantaneous heat loads. To address this challenge, battery packs generally adopt large-area liquid cooling or even multi-faceted liquid cooling designs to increase the heat exchange area. However, this, in turn, places unprecedented cooling capacity requirements on the vehicle's thermal management system that provides the cooling source. If every vehicle is equipped with ultra-high-power compressors and condensers to meet the short-term peak fast-charging demand, it will directly lead to extremely tight front compartment layout, increased manufacturing costs and overall vehicle weight. Furthermore, this system operates under low load for most of the vehicle's daily driving time, resulting in serious equipment idleness and resource waste.

[0020] The proposed solution is applicable when a vehicle is connected to a high-power DC fast charging station. In this scenario, a collaborative cooling system between the vehicle and the charging station is constructed. This system not only utilizes the vehicle's standard air conditioning system (typically used for passenger compartment cooling and regular battery cooling), but also creatively extends the air conditioning system integrated into the charging station—which might otherwise be used to cool the charging cables and interfaces—to serve as an auxiliary cooling source for the vehicle's battery thermal management system through a safe fluid connection interface (i.e., a two-way shut-off valve). Specifically, when the vehicle is plugged into the charging station, the charging interface and coolant interface are physically connected simultaneously. After charging begins, the vehicle's battery management system continuously monitors the battery temperature. Initially, the vehicle's air conditioning system operates independently to cool the battery. When the battery's heat output exceeds the maximum cooling capacity of the vehicle's air conditioning system (e.g., during the 10C supercharging phase), the system intelligently determines and automatically opens the connection valve, requesting and connecting to the cooling capacity of the charging station's air conditioning system, thus forming a collaborative cooling mode where the vehicle's air conditioning cools the core high-temperature area of ​​the battery, and the charging station's air conditioning cools the surrounding area of ​​the battery. This essentially transfers and shares some of the peak-hour cooling capacity that would otherwise be borne by the vehicle to the charging infrastructure, thereby supporting the heat dissipation requirements of extreme fast charging with a more economical and compact vehicle-side system.

[0021] For ease of understanding, some key terms used in this application are explained below. The battery thermal management system refers to a comprehensive system on a vehicle used to regulate battery temperature, including cooling channels (cold plates) flowing through the battery pack or attached to the battery modules, pumps driving the circulation of the cooling medium, and pipes and reservoirs containing the cooling medium. In this solution, the system integrates at least two parallel cooling channels. The first cooling channel typically refers to the channel located in the central region of the battery pack, through which the first cooling medium (such as refrigerants R134a, R1234yf, etc., phase change refrigerants) flows. Due to its high heat exchange efficiency, it is specifically designed to handle the most intense heat generation in the central battery cells. The second cooling channel typically refers to the channel located in the peripheral region of the battery pack, through which the second cooling medium (such as single-phase coolants such as ethylene glycol aqueous solution) flows, used to remove heat from the surrounding battery cells. The vehicle air conditioning system refers to the vehicle's built-in refrigeration cycle system, including components such as a compressor, condenser, and evaporator. It can provide cooling for the passenger compartment and also provide cooling to the battery thermal management system through a heat exchanger. The charging pile air conditioning system refers to an independent cooling system integrated inside the supercharging pile with considerable cooling capacity. Its design capacity not only meets the cooling needs of the cables, but also reserves spare capacity to support the auxiliary cooling of the vehicle battery in this application.

[0022] The key components for achieving the vehicle-to-charger cooling link connection are the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve. These are a pair of quick-connect fittings with automatic docking and sealing functions. When the charging gun is inserted into the vehicle's charging port, the plug and socket of these valves physically dock and lock together. Each valve has a spring-preloaded valve core mechanism. In the disconnected state, the valve core is pressed tightly against the sealing surface by the spring force, achieving a medium seal and preventing coolant leakage. After docking, the valve cores of both sides are pushed apart, forming a passage. More importantly, these valves can also be actively opened and closed by electrical signals. Bidirectional shut-off means that they can automatically seal both ends when physically disconnected, and can also actively close the flow path when connected under electronic control. Cooling requirements are control targets generated by the battery management system based on real-time temperature analysis, typically quantified as the desired target temperature and flow rate of the cooling medium, such as "the coolant temperature needs to be reduced to 16°C and circulated at a flow rate of 20 liters / minute." A criterion for judgment is that the cooling capacity cannot meet the cooling demand. This usually means that in actual operation, the vehicle's air conditioning system cannot maintain the cooling medium within the target temperature range required by the battery management system. This indicates that the vehicle's own cooling resources have reached their limit and external assistance needs to be activated.

[0023] Please see Figure 1 This is a schematic flowchart of a control method for a vehicle battery charging and cooling system provided in an embodiment of this application. The battery charging and cooling system includes a battery thermal management system, a vehicle air conditioning system, and a vehicle-side bidirectional shut-off valve installed in the vehicle, as well as a charging pile-side bidirectional shut-off valve and a charging pile air conditioning system installed in the charging pile. The battery thermal management system includes a first cooling channel through which a first cooling medium is introduced and a second cooling channel through which a second cooling medium is introduced, including: S110. When the vehicle is connected to the charging pile for charging, a physical connection is established between the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve. For example, during the charging connection process between the vehicle and the charging station, by inserting the charging gun into the vehicle's charging port, the charging station-side bidirectional shut-off valve installed on the charging gun and the vehicle-side bidirectional shut-off valve installed on the vehicle's charging port are mechanically guided, aligned, and locked, forming a physical connection. This connection action allows the internal channels of the two originally independently sealed valve bodies to be connected, establishing a physical connection path for the subsequent flow of cooling medium between the vehicle's battery thermal management system and the charging station's air conditioning system. This connection mechanism ensures that the cooling circuit is connected in the connected state, and when the charging gun is disconnected, the two valve bodies can automatically reset and seal under the action of internal springs and other mechanisms, effectively preventing cooling medium leakage, thus providing the necessary and safe hardware connection conditions for achieving vehicle-charging station coordinated cooling.

[0024] S120: Obtain the current temperature data of the target battery; For example, during super-fast charging of a vehicle, the target battery generates a heat load due to the high-rate charging, and its temperature state is dynamically changing. Obtaining the current temperature data of the target battery refers to collecting its current temperature data in real time through temperature sensors placed in multiple key locations inside the battery pack (cell surface, module gaps, or near the cold plate flow channels). This data reflects the real-time thermal state of the battery during charging and is the basis for determining whether the battery needs cooling intervention and determining the specific cooling intensity.

[0025] S130. Based on the current temperature data, determine the cooling requirements of the target battery; For example, the battery management system analyzes the collected temperature information and calculates the cooling intensity parameters required to maintain the battery within a safe and efficient temperature range. This process involves converting temperature data reflecting the battery's thermal state into specific control targets for the cooling system. Specifically, by comparing real-time temperature values ​​with preset temperature thresholds, it determines whether cooling needs to be activated or adjusted. When the temperature reaches or exceeds the set threshold, the system calculates the target temperature and target flow rate of the cooling medium required to control the battery temperature within the ideal range, thereby generating a cooling demand command.

[0026] S140. Based on cooling requirements, control the vehicle's air conditioning system to cool the first cooling channel; For example, controlling the vehicle's air conditioning system to cool the first cooling channel based on cooling demand refers to the process where, after receiving a cooling demand command determined by battery temperature data, the vehicle control system drives and adjusts the operating status of components such as the compressor and expansion valve in the vehicle's air conditioning system according to the temperature and flow rate targets contained in the command, causing them to operate in a cooling cycle, thereby cooling the first cooling medium flowing into the first cooling channel of the battery thermal management system. This process aims to utilize the cooling capacity of the vehicle's own air conditioning system to prioritize efficient heat dissipation in the central area of ​​the battery pack where heat is most concentrated, in order to cope with the battery temperature rise during the initial stage of fast charging or under low to medium heat load conditions.

[0027] S150. When the cooling capacity of the vehicle's air conditioning system cannot meet the cooling demand, control the opening of the vehicle-side two-way shut-off valve and the charging pile-side two-way shut-off valve to connect the second cooling channel with the charging pile's air conditioning system. For example, when the cooling capacity of the vehicle's air conditioning system cannot meet the cooling requirements determined based on the target battery temperature data, the vehicle control unit will generate a control command. First, it will control the opening of the vehicle-side bidirectional shut-off valve and send a collaborative cooling request to the charging pile controller. After receiving the request, the charging pile controller will then control the opening of the charging pile-side bidirectional shut-off valve, thereby ensuring that the fluid passage between the second cooling channel in the battery thermal management system through which the second cooling medium is introduced and the charging pile air conditioning system is safely and reliably connected.

[0028] S160. Based on cooling requirements, control the charging pile air conditioning system to cool the second cooling channel.

[0029] For example, controlling the charging pile's air conditioning system to cool the second cooling channel based on cooling demand means that after the bidirectional shut-off valves on the vehicle side and the charging pile side are opened, connecting the second cooling channel with the charging pile's air conditioning system, the charging pile controller, based on the cooling demand command received from the vehicle and determined according to the real-time battery temperature, drives its internal air conditioning compressor and other cooling components to operate, thereby cooling the second cooling medium flowing into the second cooling channel in the vehicle's battery thermal management system. This process essentially involves transporting the excess cooling capacity provided by the charging pile to the surrounding cooling area of ​​the vehicle's battery pack through an established safe fluid connection channel. This works in conjunction with the vehicle's own air conditioning system's cooling operation of the first cooling channel in the central area to jointly cope with the peak heat load of the battery caused by super-fast charging. This effectively ensures the battery's heat dissipation safety and temperature uniformity under fast charging conditions without requiring a single vehicle to be equipped with an ultra-high-power cooling system.

[0030] In summary, this application's embodiments effectively address the challenges faced by electric vehicles in super-fast charging scenarios by constructing a collaborative cooling system across vehicles and charging piles and employing a hierarchical control strategy. This system creatively integrates the surplus cooling capacity of the charging pile into an extended resource for vehicle battery thermal management, achieving safe connection and on-demand conduction of the vehicle-charging pile cooling circuit through a bidirectional shut-off valve. In terms of control methods, the vehicle's air conditioning system is prioritized for handling normal and low-to-medium load heat dissipation of the battery. When its cooling capacity is insufficient to meet the cooling requirements determined by the real-time battery temperature, the charging pile's air conditioning system is activated, forming a collaborative cooling mode where the vehicle's air conditioning focuses on cooling the central area of ​​the battery where heat is concentrated, while the charging pile's air conditioning is responsible for cooling the surrounding areas. This design not only avoids configuring expensive and bulky high-power cooling systems on each vehicle, saving per-vehicle costs and layout space, but also improves overall heat dissipation efficiency by matching differentiated cooling media and intensities to different areas of the battery using a hybrid cooling strategy. It effectively suppresses the problem of excessive internal temperature differences in the battery pack caused by heat accumulation during super-fast charging, thus providing users with a faster and more economical charging experience while ensuring battery safety and lifespan.

[0031] In some instances, the heat exchange efficiency of the first cooling medium is greater than that of the second cooling medium, the first cooling channel corresponds to the central region of the target battery, and the second cooling channel corresponds to the peripheral region of the target battery.

[0032] For example, such as Figure 2As shown, the first cooling channel is a refrigerant channel for the cold plate, and the second cooling channel is a coolant channel for the cold plate. The first cooling medium uses a refrigerant with higher heat exchange efficiency, such as R134a or R1234yf, which are phase change media. Their ability to absorb heat through the latent heat of phase change is significantly higher than that of conventional single-phase coolants. The second cooling medium is usually a liquid cooling medium such as ethylene glycol aqueous solution. The design of introducing the first cooling medium with higher heat exchange efficiency into the first cooling channel corresponding to the central region of the target battery, and the second cooling medium with relatively lower heat exchange efficiency into the second cooling channel corresponding to the peripheral region of the target battery, is based on the uneven heat distribution inside the battery pack during super-fast charging. During ultra-high rate charging, the cells in the center of the battery pack become the main heat accumulation area due to their longer heat dissipation path and greater thermal resistance, resulting in the most severe heat load. Therefore, placing the refrigerant channel (first cooling channel) with stronger heat exchange capacity in the central region can quickly remove the maximum heat load with higher efficiency, thereby effectively curbing the rapid rise in the central temperature. In contrast, the heat load of the cells in the area surrounding the battery pack is relatively low, and their heat dissipation requirements can be met by using a lower-cost and simpler liquid cooling cycle (second cooling channel). This differentiated channel layout, which matches different heat exchange efficiencies of cooling media according to the differences in heat load, constitutes the core of the hybrid cooling design, which aims to achieve efficient cooling of the battery's critical hot areas with optimal resource allocation.

[0033] In summary, the embodiments of this application improve the overall efficiency of the system in handling peak heat loads by prioritizing limited cooling power resources to the parts with the most urgent heat dissipation needs. This achieves superior heat dissipation performance with the same or smaller total cooling power configuration, helping to alleviate the pressure on the vehicle's cooling system. This design is an effective means of addressing excessive temperature differences within the battery pack during super-fast charging. By enhancing heat dissipation in the central area and moderately maintaining the temperature of the surrounding areas, it actively adjusts the temperature field distribution within the battery pack, keeping the temperature difference between the central and peripheral cells within a reasonable range. This not only improves temperature uniformity but also helps ensure battery cycle life and safety.

[0034] In some instances, the cooling requirements of a target battery are determined based on current temperature data, including: Based on the current temperature data, determine the current highest temperature of the target battery. The current highest temperature is the sampled value with the largest value among the multiple cell temperature samples included in the current temperature data. The cooling requirement is determined based on the current highest temperature and the first preset temperature threshold.

[0035] For example, the process of determining the current maximum temperature of the target battery based on current temperature data specifically refers to the battery management system analyzing multiple cell temperature samples collected in real time from temperature sensors located at multiple key locations inside the battery pack. The system then selects the sample value with the highest value from these samples and determines it as the current maximum temperature of the target battery. This current maximum temperature directly represents the hottest point of the battery pack during charging and serves as the basis for assessing battery thermal safety and determining when to intervene with cooling.

[0036] The current highest temperature is compared with a first preset temperature threshold, which is a temperature threshold set in advance to trigger battery cooling. Its specific value needs to be calibrated and confirmed according to the characteristics of different battery systems, for example, it can be calibrated as 27°C. When the current highest temperature is greater than or equal to the first preset temperature threshold, it is determined that battery cooling needs to be started and a corresponding cooling demand command is generated. When the current highest temperature is less than or equal to a second preset temperature threshold, it is determined that battery cooling needs to be turned off. The second preset temperature threshold is another preset value lower than the first preset temperature threshold, for example, it can be calibrated as 25°C. The cooling demand command specifically includes the target temperature and target flow rate parameters of the cooling medium required to control the battery temperature within the safe and efficient range. For example, the target temperature of the coolant is 16°C and the target flow rate is 20L / min, and the target temperature of the refrigerant is 10°C and the target flow rate is 15L / min.

[0037] In summary, the embodiments of this application, through the aforementioned method for determining cooling requirements based on temperature data, can achieve the perception of the battery's thermal state. A control logic based on the battery's actual highest temperature is established, ensuring the timeliness and accuracy of the cooling system's intervention and avoiding cooling lag or overcooling problems caused by incomplete temperature sampling or a simplistic judgment logic.

[0038] In some instances, based on cooling requirements, the vehicle's air conditioning system is controlled to cool the first cooling channel, including: Based on cooling requirements, determine the first target temperature data and the first target flow rate data for the first cooling channel; Based on the first target temperature data and the first target flow data, the vehicle's air conditioning system is controlled to cool the first cooling medium in the first cooling channel.

[0039] For example, after acquiring the cooling demand determined by the battery temperature data, the vehicle control unit or battery management system determines the specific control targets for the first cooling channel included in the demand, namely, the first target temperature data and the first target flow rate data. The first target temperature data refers to the specific temperature value that the first cooling medium is expected to reach for effective cooling of the central area of ​​the battery, such as 10°C; the first target flow rate data refers to the volume of the first cooling medium required to flow through the first cooling channel per unit time to achieve the expected heat exchange effect, such as 15L / min. Subsequently, the vehicle control unit sends a control command containing the aforementioned first target temperature data and first target flow rate data to the vehicle air conditioning system. After receiving the command, the vehicle air conditioning system adjusts parameters such as the compressor speed, the opening of the expansion valve, and the operating conditions of the cooling fan to match the output capacity of its cooling cycle with the command requirements, thereby reducing the temperature of the first cooling medium flowing into the first cooling channel to the level set by the first target temperature data and stabilizing its flow rate within the range specified by the first target flow rate data. This process ensures that the central area where the battery heats up most concentrated receives targeted cooling of appropriate intensity and controllability.

[0040] In summary, this application embodiment, through the aforementioned method of controlling the vehicle's air conditioning system based on specific temperature and flow targets, achieves management of the heat dissipation intensity of the core hot zone of the battery. This enables the vehicle's own cooling resources to be utilized most effectively, avoiding insufficient or excessive cooling. By quantifying cooling requirements into specific medium temperature and flow parameters, and using these to drive the air conditioning system, the accuracy and stability of cooling output are ensured, providing heat dissipation protection for the central area of ​​the battery. This is the foundation for handling the heat load at the beginning of fast charging and leveraging the advantages of the refrigerant flow channel in the hybrid cooling strategy.

[0041] In some instances, based on cooling requirements, the charging pile's air conditioning system is controlled to cool the second cooling channel, including: Based on cooling requirements, determine the second target temperature data and the second target flow rate data for the second cooling channel; Based on the second target temperature data and the second target flow data, the charging pile air conditioning system is controlled to cool the second cooling medium in the second cooling channel.

[0042] For example, when the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve are opened, safely connecting the second cooling channel in the battery thermal management system to the charging pile's air conditioning system, the vehicle's control unit (e.g., VCU) sends a cooling demand containing specific cooling parameter instructions to the charging pile. Upon receiving this cooling demand, the charging pile's control unit first parses out the control targets specifically for the second cooling channel, namely, the second target temperature data and the second target flow rate data. The second target temperature data is a specific temperature value, pre-calculated or calibrated based on battery heat dissipation requirements, expected to be reached by the second cooling medium, for example, 16°C; the second target flow rate data is the volumetric flow rate of the second cooling medium flowing through the second cooling channel per unit time, set to meet heat exchange requirements, for example, 20 L / min. Subsequently, based on the parsed second target temperature data and second target flow rate data, the charging pile control unit generates corresponding control commands to drive the compressor, pump, valves, and other actuators within the charging pile's air conditioning system to work collaboratively. The charging pile's air conditioning system adjusts its cooling power and circulation flow accordingly to match the command requirements, thereby cooling the second cooling medium flowing into the vehicle's second cooling channel and stabilizing its temperature and flow rate within the range specified by the second target temperature and flow rate data. This process enables the excess cooling capacity at the charging pile end to be delivered to the surrounding cooling area of ​​the vehicle's battery pack through the established connection channels.

[0043] In summary, the embodiments of this application achieve coordinated and on-demand allocation of cooling resources between the vehicle and the charging pile. By quantifying cooling requirements into specific temperature and flow parameters and transmitting them to the charging pile, it ensures that the cooling output of the charging pile's air conditioning system matches the actual heat dissipation needs of the vehicle's battery, avoiding insufficient cooling or energy waste. This allows the cooling capacity of the charging pile to be efficiently integrated as an extension of the vehicle's battery thermal management system under peak load, effectively solving the problem of insufficient vehicle cooling capacity in super-fast charging scenarios without increasing the configuration of the vehicle's cooling system, and ensuring the thermal safety of the battery during high-rate charging.

[0044] In some instances, after controlling the charging pile's air conditioning system to cool the second cooling channel based on cooling requirements, the following is also included: Obtain the temperature of the central region and the temperature of the surrounding region of the target battery; The temperature difference of the target battery is calculated based on the temperature of the central region and the temperature of the surrounding region. When the temperature difference is greater than or equal to the second preset temperature threshold, a first adjustment parameter for the first cooling medium and a second adjustment parameter for the second cooling medium are determined; wherein, the first adjustment parameter is to increase the flow rate of the first cooling medium or decrease the temperature of the first cooling medium, and the second adjustment parameter is to increase the temperature of the second cooling medium or decrease the flow rate of the second cooling medium; Based on the first adjustment parameter, control the cooling operation of the vehicle air conditioning system on the first cooling channel; Based on the second adjustment parameter, the cooling operation of the charging pile air conditioning system on the second cooling channel is controlled.

[0045] For example, after controlling the charging pile's air conditioning system to cool the second cooling channel based on cooling requirements, to optimize the internal temperature uniformity of the battery pack and improve the battery's safety and durability under super-fast charging conditions, the control method further includes the step of acquiring the temperature of the target battery's central region and the temperature of its surrounding region. This step involves calling a group of temperature sensors arranged in the central and surrounding regions of the battery pack to collect and upload the central and surrounding region temperatures in real time. The central region temperature typically refers to the temperature measurement value or the average of these measurements of one or more representative cells at the center of the battery pack, used to characterize the thermal state of the region with the longest heat dissipation path and the highest thermal resistance; the surrounding region temperature refers to the temperature measurement value or the average of these measurements of one or more representative cells at the edge of the battery pack, used to characterize the thermal state of the region with relatively better heat dissipation conditions.

[0046] After acquiring the temperatures of the central and surrounding areas, the control method performs a step of calculating the target battery temperature difference based on these temperatures. Specifically, the temperature difference is calculated by subtracting the temperature of the surrounding area from the temperature of the central area; the resulting difference is the real-time temperature difference of the target battery.

[0047] After calculating the temperature difference of the target battery, when the temperature difference is greater than or equal to a second preset temperature threshold, a first adjustment parameter for the first cooling medium and a second adjustment parameter for the second cooling medium are determined. The second preset temperature threshold is a pre-calibrated numerical limit, for example, set to 10°C. Its significance lies in defining whether the temperature difference inside the battery pack has expanded to a level requiring active intervention. When the real-time temperature difference reaches or exceeds this threshold, it indicates that the thermal imbalance between the center and the surrounding area has intensified, and a temperature difference balancing strategy needs to be activated. The first adjustment parameter is defined as an operation to enhance the cooling intensity of the battery's central area, specifically by increasing the flow rate of the first cooling medium or decreasing its temperature. The second adjustment parameter is defined as an operation to moderately reduce the cooling intensity of the battery's surrounding area, specifically by increasing the temperature of the second cooling medium or decreasing its flow rate. This step establishes the specific control direction for reducing the temperature difference by differentially adjusting the parameters of the two cooling media.

[0048] After determining the first and second adjustment parameters, the control method executes the step of controlling the vehicle's air conditioning system to cool the first cooling channel based on the first adjustment parameter. This step translates the aforementioned decision into specific control commands for the vehicle's own air conditioning system. If the first adjustment parameter is to increase the flow rate of the first cooling medium, the vehicle's air conditioning system is controlled to increase the speed of the pump driving the circulation of the first cooling medium; if the first adjustment parameter is to decrease the temperature of the first cooling medium, the vehicle's air conditioning system is controlled to increase the cooling power of its compressor. Its direct purpose is to increase the heat dissipation power to the central area of ​​the battery, accelerating the reduction of the central area's temperature.

[0049] The control method synchronously executes the step of controlling the cooling operation of the charging pile air conditioning system on the second cooling channel based on the second adjustment parameter. This step translates another part of the temperature difference balancing strategy decision into specific control instructions for the charging pile air conditioning system. If the second adjustment parameter is to increase the temperature of the second cooling medium, the charging pile air conditioning system is controlled to appropriately reduce its cooling output power, thereby increasing the temperature of the outflowing second cooling medium; if the second adjustment parameter is to reduce the flow rate of the second cooling medium, the charging pile air conditioning system is controlled to reduce the speed of the pump driving the circulation of the second cooling medium. Its direct purpose is to moderately reduce the heat dissipation power to the area surrounding the battery, slowing down the rate of temperature decrease in the surrounding area or causing its temperature to rise slightly.

[0050] In summary, this embodiment of the application achieves a battery pack temperature difference balance control by performing the steps described above: acquiring temperature, calculating temperature difference, determining threshold, setting adjustment parameters, and controlling the vehicle-side and charging pile-side air conditioning systems respectively. This process effectively suppresses the problem of excessive internal temperature difference caused by heat accumulation in the center of the battery pack during super-fast charging. By strengthening cooling in the central area and moderately weakening cooling in the peripheral area, this strategy promotes a more uniform temperature between the center and the periphery, thereby improving the temperature uniformity of the battery pack. This not only helps reduce battery performance degradation and inconsistent aging rates caused by local overheating or excessive temperature differences, ensuring the safe operation of the battery system, but also provides support for maintaining the battery's optimal operating state and extending its service life.

[0051] During the execution of the preset temperature threshold temperature difference balancing strategy, it's important to clarify that battery cooling control follows a strategy priority logic. Specifically, based on the design principle that the safety risk directly caused by excessively high battery temperature is higher than the risk caused by a large temperature difference within the battery pack, the cooling strategy control logic takes precedence over the temperature difference balancing logic. This means that when the real-time battery temperature triggers a cooling demand based on an absolute temperature threshold, regardless of whether the temperature difference balancing strategy is running or the temperature difference status, the cooling logic aimed at reducing battery temperature will be executed first. Under typical super-fast charging conditions, due to the longer heat dissipation path and greater thermal resistance of the cells in the central area of ​​the battery pack, the heat accumulation effect is significant. Therefore, the temperature of the cells in the central area is generally higher than that of the cells in the surrounding areas; that is, there is usually no situation where the temperature of the surrounding cells surpasses that of the central cells. Based on this temperature distribution characteristic, the design of the preset temperature threshold temperature difference balancing strategy is based on the premise that the temperature in the central area is higher than that in the surrounding areas. When the real-time temperature difference between the preset temperature threshold and the second preset temperature threshold (e.g., 10°C) is detected to be greater than or equal to the second preset temperature threshold, the preset temperature threshold temperature difference balancing strategy is activated. By executing the first and second preset temperature threshold adjustment parameters, the temperature in the central area decreases due to enhanced cooling, while the temperature in the surrounding area may slightly increase due to weakened cooling, thus reducing the temperature difference. Once the real-time temperature difference between the preset temperature threshold and the third preset temperature threshold (e.g., 7°C) decreases to be equal to or lower than the third preset temperature threshold, the preset temperature threshold temperature difference balancing strategy is exited, and the system reverts to the normal collaborative cooling mode. This ensures that the temperature in the surrounding area does not rise excessively due to the strategy execution. Crucially, if, during the execution of the temperature difference balancing strategy, the battery's current highest preset temperature threshold or the temperature in the central area of ​​the preset temperature threshold reaches or exceeds the preset temperature threshold used to trigger cooling, it indicates a more urgent need for heat dissipation. In this case, the preset temperature threshold temperature difference balancing strategy will be immediately paused or exited, prioritizing full-force cooling to ensure the absolute temperature safety of the battery. This priority control logic ensures that, under complex thermal load conditions, the highest safety objective of preventing battery overheating is always prioritized, while also considering the optimization objective of improving temperature uniformity.

[0052] In some instances, it also includes: Obtain the current charging state data of the target battery; Based on the current temperature data and current charging status data, the system controls the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve to close, and controls the charging pile's air conditioning system to stop operating.

[0053] For example, after controlling the charging pile air conditioning system to cool the second cooling channel, the control method further includes the step of acquiring the current charging state data of the target battery, which mainly includes the battery's state of charge; based on the current temperature data and the current charging state data, the steps of controlling the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve to close and controlling the charging pile air conditioning system to stop operating are as follows: When the battery management system detects that the target battery's current maximum temperature is lower than or equal to the cooling shut-off temperature threshold and simultaneously detects that the target battery's current state of charge is lower than a preset charging cut-off threshold (e.g., the maximum temperature Tmax ≤ 25℃ and the state of charge SOC < 90%), it determines that the battery's heat dissipation demand has decreased and the charging process has not yet entered the final constant voltage stage. At this time, the battery management system sends a command to the vehicle controller to shut off cooling demand or reduce cooling demand. Upon receiving this command, the vehicle controller first generates and sends a shut-off command to the control unit of the vehicle-side bidirectional shut-off valve, switching it from the open state to the closed state, thereby actively cutting off the flow from the charging pile to the vehicle battery thermal management system. The vehicle controller sends a cooling shutdown request to the charging pile controller via the communication link between the vehicle and the charging pile. In response, the charging pile controller first generates and sends a shutdown command to the control unit of the bidirectional shut-off valve on the charging pile side, causing it to close synchronously. This physically isolates the cooling circuit between the vehicle and the charging pile. Then, it generates and sends a shutdown command to the charging pile's air conditioning system, stopping its compressor and circulation pump. At this point, the cooling assistance function at the charging pile end is completely deactivated. After this, the vehicle's air conditioning system operates independently, cooling the first cooling channel based on real-time battery temperature data, thus completing the transition from a vehicle-charging pile coordinated cooling mode to a vehicle-independent cooling mode.

[0054] In summary, this application's embodiments achieve more efficient control of the cooling process by introducing charging status data as one of the joint judgment conditions for the cooling system to exit the collaborative mode. It not only judges the strength of heat dissipation demand based on battery temperature but also combines it with the charging progress, avoiding unnecessary maintenance of high-power collaborative cooling when the battery's heat generation naturally decreases at the end of charging, thereby saving energy consumption and reducing operational wear on the charging pile's air conditioning system. By sequentially closing the valves before shutting down the system, the cooling medium circuit is safely isolated under controllable pressure, effectively preventing medium leakage or pressure surges and improving system operational safety. Finally, by decomposing the collaborative cooling exit process from the charging pile to the vehicle, the smooth and stable switching of the battery thermal management system's operating conditions during the decrease in cooling power demand is ensured, avoiding temperature fluctuations. While achieving energy saving and system protection goals, it also ensures consistent battery temperature management throughout the entire charging cycle.

[0055] Please see Figure 3 This is a schematic diagram of a vehicle battery charging and cooling system provided in an embodiment of this application. The vehicle battery charging and cooling system includes: a battery thermal management system 21, a vehicle air conditioning system 22, a vehicle-side bidirectional shut-off valve 23, a charging pile-side bidirectional shut-off valve 24, and a charging pile air conditioning system 25. The battery thermal management system 21 includes a first cooling channel through which a first cooling medium is introduced and a second cooling channel through which a second cooling medium is introduced; The battery thermal management system 21 is used to acquire the current temperature data of the target battery and determine the cooling requirements of the target battery based on the current temperature data. The vehicle air conditioning system 22 is used to cool the first cooling channel in the battery thermal management system 21 based on cooling requirements; The vehicle-side bidirectional shut-off valve 23 is used to establish a physical connection with the charging pile-side bidirectional shut-off valve 24 when the vehicle is connected to the charging pile for charging, and to open when the cooling capacity of the vehicle air conditioning system 22 cannot meet the cooling requirements. The charging pile side bidirectional shut-off valve 24 is used to establish a physical connection with the vehicle side bidirectional shut-off valve 23 when the vehicle is connected to the charging pile for charging, and to open when the cooling capacity of the vehicle air conditioning system 22 cannot meet the cooling requirements. The charging pile air conditioning system 25 is used to cool the second cooling channel in the battery thermal management system 21 based on cooling requirements after the vehicle-side bidirectional shut-off valve 23 and the charging pile-side bidirectional shut-off valve 24 are opened.

[0056] The vehicle battery charging cooling system of this embodiment comprises a battery thermal management system 21, a vehicle air conditioning system 22, a vehicle-side bidirectional shut-off valve 23, a charging pile-side bidirectional shut-off valve 24, and a charging pile air conditioning system 25, forming a vehicle-pile coordinated cooling link. The battery thermal management system 21 is deployed within the vehicle battery pack and includes a first cooling channel and a second cooling channel arranged in parallel, corresponding to the central and peripheral areas of the battery pack, respectively. It collects real-time temperature data of each cell through a distributed temperature sensor network. When the battery thermal management system 21 determines that the battery's highest temperature has reached or exceeded a first preset temperature threshold, it calculates the target temperature and target flow rate of the cooling medium required to maintain the battery's safe temperature range, thereby generating specific cooling requirements. The vehicle air conditioning system 22, acting as the active cold source on the vehicle side, immediately starts and adjusts its compressor power and expansion valve opening upon receiving the cooling requirement, rapidly cooling the first cooling medium (e.g., a phase change refrigerant) flowing into the first cooling channel to the required target temperature to cope with the concentrated heat load generated in the central area of ​​the battery due to the long heat dissipation path and high thermal resistance. The vehicle-side bidirectional shut-off valve 23 and the charging pile-side bidirectional shut-off valve 24 are key components for achieving a safe connection between the vehicle and the charging pile fluid circuit. During the process of inserting the charging gun into the vehicle's charging port, the two automatically complete physical docking and sealing through the built-in guiding and locking mechanism. When the battery thermal management system 21 detects that the actual cooling effect (such as the inlet temperature of the first cooling channel) fails to meet the target value set for cooling demand, that is, when it determines that the cooling capacity of the vehicle air conditioning system 22 has reached its upper limit and cannot meet the demand, the vehicle controller will generate an electronic control command. First, it will control the vehicle-side bidirectional shut-off valve 23 to open actively and simultaneously send a collaborative cooling request to the charging pile. After receiving the request, the charging pile controller will immediately control the charging pile-side bidirectional shut-off valve 24 to open, thereby reliably connecting the coolant passage between the second cooling channel in the battery thermal management system 21 and the charging pile air conditioning system 25. As an auxiliary cold source on the charging pile side, the charging pile air conditioning system 25 immediately responds to the cooling demand from the vehicle after the passage is established, starts its internal high-power refrigeration cycle, forces the second cooling medium (such as ethylene glycol aqueous solution) flowing into the second cooling channel to cool down, and then transports it back to the area around the vehicle battery pack for heat exchange. Through the aforementioned collaborative mechanism, the system extends the surplus cooling capacity reserved at the charging pile to supplement the vehicle battery thermal management system. Without increasing the configuration of a high-power compressor in a single vehicle, it solves the peak heat dissipation problem in the super-fast charging scenario and optimizes the internal temperature uniformity of the battery pack through a differentiated cooling strategy.

[0057] Those skilled in the art will understand that embodiments of this application can provide methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media containing computer-readable program code.

[0058] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0059] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0060] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0061] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to perform... Figure 1 The flowchart of a control method for a vehicle battery charging and cooling system in a corresponding embodiment.

[0062] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, computer instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any usable medium that a computer can store or a data storage device such as a server or data center that integrates one or more usable media. The usable medium may be a magnetic medium, an optical medium, or a semiconductor medium, etc.

[0063] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0064] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Furthermore, the mutual couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0065] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0066] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in the form of hardware and / or software functional units.

[0067] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device to execute all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, magnetic disks, or optical disks.

[0068] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0069] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications that fall outside the scope of this specification.

[0070] Obviously, those skilled in the art can make various modifications to this specification without departing from its spirit and scope. Therefore, this specification also intends to include any modifications that fall within the scope of the claims and their equivalents.

Claims

1. A control method for a vehicle battery charging and cooling system, characterized in that, The battery charging cooling system includes a battery thermal management system, a vehicle air conditioning system, and a vehicle-side bidirectional shut-off valve installed in the vehicle, as well as a charging pile-side bidirectional shut-off valve and a charging pile air conditioning system installed in the charging pile; the battery thermal management system includes a first cooling channel through which a first cooling medium is introduced and a second cooling channel through which a second cooling medium is introduced, including: When the vehicle is connected to the charging pile for charging, a physical connection is established between the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve. Obtain the current temperature data of the target battery; Based on the current temperature data, determine the cooling requirements of the target battery; Based on the cooling requirements, the vehicle air conditioning system is controlled to cool the first cooling channel. When the cooling capacity of the vehicle air conditioning system cannot meet the cooling demand, the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve are opened to connect the second cooling channel with the charging pile air conditioning system. Based on the cooling requirements, the charging pile air conditioning system is controlled to cool the second cooling channel.

2. The method according to claim 1, characterized in that, The heat exchange efficiency of the first cooling medium is greater than that of the second cooling medium. The first cooling channel corresponds to the central region of the target battery, and the second cooling channel corresponds to the peripheral region of the target battery.

3. The method according to claim 1, characterized in that, Determining the cooling requirements of the target battery based on the current temperature data includes: Based on the current temperature data, the current highest temperature of the target battery is determined, where the current highest temperature is the sampled value with the largest value among the multiple cell temperature sampled values ​​included in the current temperature data. The cooling requirement is determined based on the current highest temperature and the first preset temperature threshold.

4. The method according to claim 1, characterized in that, The step of controlling the vehicle air conditioning system to cool the first cooling channel based on the cooling demand includes: Based on the cooling requirements, the first target temperature data and the first target flow rate data of the first cooling channel are determined; Based on the first target temperature data and the first target flow rate data, the vehicle air conditioning system is controlled to cool the first cooling medium in the first cooling channel.

5. The method according to claim 1, characterized in that, The step of controlling the charging pile air conditioning system to cool the second cooling channel based on the cooling demand includes: Based on the cooling requirements, determine the second target temperature data and the second target flow rate data for the second cooling channel; Based on the second target temperature data and the second target flow rate data, the charging pile air conditioning system is controlled to cool the second cooling medium in the second cooling channel.

6. The method according to claim 1, characterized in that, After controlling the charging pile air conditioning system to cool the second cooling channel based on the cooling demand, the method further includes: Obtain the temperature of the central region and the temperature of the surrounding region of the target battery; The temperature difference of the target battery is calculated based on the temperature of the central region and the temperature of the surrounding region. When the temperature difference is greater than or equal to the second preset temperature threshold, a first adjustment parameter for the first cooling medium and a second adjustment parameter for the second cooling medium are determined; wherein, the first adjustment parameter is to increase the flow rate of the first cooling medium or decrease the temperature of the first cooling medium, and the second adjustment parameter is to increase the temperature of the second cooling medium or decrease the flow rate of the second cooling medium; Based on the first adjustment parameter, the vehicle air conditioning system is controlled to perform cooling operation on the first cooling channel; Based on the second adjustment parameter, the cooling operation of the charging pile air conditioning system on the second cooling channel is controlled.

7. The method according to claim 1, characterized in that, Also includes: Obtain the current charging state data of the target battery; Based on the current temperature data and the current charging status data, the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve are controlled to close, and the charging pile air conditioning system is controlled to stop operating.

8. The method according to claim 1, characterized in that, The cooling requirements include the temperature of the cooling medium and the flow rate of the cooling medium.

9. A vehicle battery charging and cooling system, characterized in that, include: Battery thermal management system, vehicle air conditioning system, vehicle-side bidirectional shut-off valve, charging pile-side bidirectional shut-off valve and charging pile air conditioning system; The battery thermal management system includes a first cooling channel through which a first cooling medium is introduced and a second cooling channel through which a second cooling medium is introduced. The battery thermal management system is used to acquire the current temperature data of the target battery and determine the cooling requirements of the target battery based on the current temperature data. The vehicle air conditioning system is used to cool the first cooling channel based on the cooling demand; The vehicle-side bidirectional shut-off valve is used to establish a physical connection with the charging pile-side bidirectional shut-off valve when the vehicle is connected to the charging pile for charging, and to open when the cooling capacity of the vehicle air conditioning system cannot meet the cooling requirements. The charging pile side bidirectional shut-off valve is used to establish a physical connection with the vehicle side bidirectional shut-off valve when the vehicle is connected to the charging pile for charging, and to open when the cooling capacity of the vehicle air conditioning system cannot meet the cooling demand. The charging pile air conditioning system is used to cool the second cooling channel based on the cooling demand after the vehicle-side bidirectional shut-off valve and the charging pile-side bidirectional shut-off valve are opened.

10. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program stored in the memory to implement the steps of the control method for a vehicle battery charging and cooling system as claimed in any one of claims 1 to 8.

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