Charging cooling method and device, vehicle control unit, vehicle cooling system and vehicle

Abstract

The invention provides a charging cooling method and device, a vehicle control unit, a vehicle cooling system and a vehicle, and relates to the technical field of vehicles, a charging pile cooling system is arranged in a charging pile, and a vehicle cooling system and a charging cooling liquid loop connected with the charging pile cooling system are arranged in the vehicle. The whole vehicle cooling system and the charging cooling liquid loop exchange heat through the charging heat exchanger; when the charging pile cooling system is started, the charging pile cooling system communicates with the charging cooling liquid loop and cools cooling liquid in a charging heat exchanger in the charging cooling liquid loop. The method comprises the steps that in the charging process of a battery system, the real-time temperature value of a battery pack in the battery system is obtained, and the power of a whole vehicle cooling system and the power of a charging pile cooling system are adjusted so as to cool the battery system. The problems that a whole vehicle heat dissipation system cannot meet the efficient heat dissipation requirement under high-rate charging and a high-power heat dissipation system is difficult to arrange on a whole vehicle are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a charging cooling method and device, a vehicle controller, a vehicle cooling system, and a vehicle. Background Art

[0002] The fast charging ability of the battery system in electric vehicles has gradually developed from the initial 1C to 2C and 4C charging rates, and some battery systems already have 5C and 6C fast charging products. Among them, C is the rate, which refers to the multiple of the charge and discharge current relative to the rated capacity of the battery cell. The problem of large heat generation caused by high-rate charging has become increasingly obvious, and the development of an efficient high-power heat dissipation system has become particularly important.

[0003] However, the power of the current vehicle heat dissipation system is low and cannot meet the heat dissipation requirements of the battery system at 4C and 6C charging rates. High-power heat dissipation systems are often difficult to be arranged on the vehicle due to their large volume and mass. Summary of the Invention

[0004] The purpose of the present invention is to provide a charging cooling method and device, a vehicle controller, a vehicle cooling system, and a vehicle to alleviate the problems that the vehicle heat dissipation system cannot meet the efficient heat dissipation requirements under high-rate charging and that high-power heat dissipation systems are difficult to be arranged on the vehicle.

[0005] In a first aspect, an embodiment of the present invention provides a charging cooling method, which is applied to a vehicle controller in a vehicle that charges a battery system through a charging pile. A charging pile cooling system is provided in the charging pile, a vehicle cooling system and a charging coolant circuit connected to the charging pile cooling system are provided in the vehicle, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit and cools the coolant in the charging heat exchanger in the charging coolant circuit; the charging cooling method includes:

[0006] During the charging process of the battery system, obtain the real-time temperature value of the battery pack in the battery system;

[0007] According to the real-time temperature value, adjust the power of the vehicle cooling system and the power of the charging pile cooling system to cool the battery system.

[0008] Further, the adjusting the power of the vehicle cooling system and the power of the charging pile cooling system according to the real-time temperature value includes:

[0009] Determine the current temperature range to which the real-time temperature value belongs; where the current temperature range is one of a plurality of preset temperature ranges, and there is no overlap between different temperature ranges;

[0010] Based on the current temperature range, determine whether there is a change in the temperature range of the battery pack;

[0011] When there is a change in the temperature range of the battery pack, based on the current temperature range, adjust the power of the vehicle cooling system and the power of the charging pile cooling system.

[0012] Further, the determining whether there is a change in the temperature range of the battery pack according to the current temperature range includes:

[0013] Compare the current temperature range with the stored previous temperature range to obtain a comparison result;

[0014] When the comparison result is different, determine that there is a change in the temperature range of the battery pack.

[0015] Further, the adjusting the power of the vehicle cooling system and the power of the charging pile cooling system based on the current temperature range includes:

[0016] When the current temperature range is the first temperature range, control both the vehicle cooling system and the charging pile cooling system to operate at their maximum power; wherein, the first temperature range is a temperature range greater than or equal to a preset first temperature threshold;

[0017] When the current temperature range is the second temperature range, control the vehicle cooling system to operate at a first power and the charging pile cooling system to operate at its maximum power; wherein, the second temperature range is a temperature range greater than or equal to a preset second temperature threshold and less than the first temperature threshold, and the first power is less than the maximum power of the vehicle cooling system;

[0018] When the current temperature range is the third temperature range, turn off the vehicle cooling system and control the charging pile cooling system to operate at its maximum power; wherein, the third temperature range is a temperature range greater than or equal to a preset third temperature threshold and less than the second temperature threshold;

[0019] When the current temperature range is the fourth temperature range, turn off the vehicle cooling system and control the charging pile cooling system to operate at a second power; wherein, the fourth temperature range is a temperature range greater than or equal to a preset fourth temperature threshold and less than the third temperature threshold, and the second power is less than the maximum power of the charging pile cooling system;

[0020] When the current temperature range is the fifth temperature range, turn off both the vehicle cooling system and the charging pile cooling system; wherein, the fifth temperature range is a temperature range less than the fourth temperature threshold.

[0021] Further, adjusting the power of the vehicle cooling system and the power of the charging pile cooling system includes:

[0022] Adjusting the power of the vehicle cooling system by controlling the rotational speed of the compressor and / or the opening degree of the electronic expansion valve in the vehicle cooling system;

[0023] Sending a power adjustment command to the charging pile cooling system so that the charging pile cooling system adjusts the power of the charging pile cooling system by controlling the opening degree of the ball valve in the charging pile cooling system.

[0024] In a second aspect, an embodiment of the present invention further provides a charging cooling device, which is applied to a vehicle controller in a vehicle that charges a battery system through a charging pile. A charging pile cooling system is provided in the charging pile, a vehicle cooling system and a charging coolant circuit connected to the charging pile cooling system are provided in the vehicle, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit and cools the coolant in the charging heat exchanger in the charging coolant circuit; the charging cooling device includes:

[0025] A temperature acquisition module, configured to acquire a real-time temperature value of a battery pack in the battery system during the charging process of the battery system;

[0026] A power adjustment module, configured to adjust the power of the vehicle cooling system and the power of the charging pile cooling system according to the real-time temperature value to cool the battery system.

[0027] In a third aspect, an embodiment of the present invention further provides a vehicle controller, including a memory and a processor. A computer program that can run on the processor is stored in the memory, and when the processor executes the computer program, the charging cooling method described in the first aspect is implemented.

[0028] In a fourth aspect, an embodiment of the present invention further provides a vehicle cooling system, including the vehicle controller described in the third aspect, and further including a vehicle cooling system and a charging coolant circuit. The vehicle cooling system is connected to the vehicle controller, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger;

[0029] When charging the battery system of a vehicle through a charging pile, the charging coolant circuit is connected to the charging pile cooling system in the charging pile, and the charging pile cooling system is connected to the vehicle controller; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit and cools the coolant in the charging heat exchanger in the charging coolant circuit.

[0030] In a fifth aspect, an embodiment of the present invention further provides a vehicle, including the vehicle cooling system described in the fourth aspect.

[0031] In a sixth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, it executes the charging cooling method described in the first aspect.

[0032] In the charging cooling method, device, vehicle controller, vehicle cooling system and vehicle provided by the embodiments of the present invention, the method is applied to the vehicle controller in a vehicle that charges the battery system through a charging pile. A charging pile cooling system is arranged in the charging pile, a vehicle cooling system and a charging coolant circuit connected to the charging pile cooling system are arranged in the vehicle, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit and cools the coolant in the charging heat exchanger in the charging coolant circuit; the method includes: during the charging process of the battery system, obtaining the real-time temperature value of the battery pack in the battery system; according to the real-time temperature value, adjusting the power of the vehicle cooling system and the power of the charging pile cooling system to cool the battery system. In this way, the charging pile cooling system in the charging pile is used to cool the battery system, which improves the heat dissipation power of the battery system during the charging process. At the same time, the charging pile cooling system belongs to an external cooling system and does not need to be arranged on the vehicle, so it alleviates the problems that the vehicle cooling system cannot meet the high-efficiency heat dissipation requirements under high-rate charging and that a high-power heat dissipation system is difficult to be arranged on the vehicle. Description of the Drawings

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic flow chart of a charging cooling method provided by an embodiment of the present invention;

[0035] Figure 2Schematic flowchart of another charging cooling method provided by an embodiment of the present invention;

[0036] Figure 3 Schematic structural diagram of a charging cooling device provided by an embodiment of the present invention;

[0037] Figure 4 Schematic structural diagram of a vehicle controller provided by an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of the module composition of a vehicle cooling system provided by an embodiment of the present invention;

[0039] Figure 6 Schematic diagram of the application scenario of a vehicle cooling system provided by an embodiment of the present invention. Detailed implementation manners

[0040] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] At present, the power of the vehicle cooling system is relatively low and cannot meet the cooling requirements of the battery system at a charging rate of 4C or 6C. High-power cooling systems are often difficult to be arranged on the vehicle due to their large volume and mass. Based on this, a charging cooling method, device, vehicle controller, vehicle cooling system and vehicle provided by the embodiments of the present invention can alleviate the problems that the vehicle cooling system cannot meet the high-efficiency cooling requirements under high-rate charging and that high-power cooling systems are difficult to be arranged on the vehicle.

[0042] For the convenience of understanding this embodiment, a charging cooling method disclosed in the embodiments of the present invention will be introduced in detail first.

[0043] The embodiments of the present invention provide a charging cooling method, which is applied to a vehicle controller in a vehicle that charges a battery system through a charging pile. A charging pile cooling system is provided in the charging pile, a vehicle cooling system and a charging coolant circuit connected to the charging pile cooling system are provided in the vehicle, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit and cools the coolant in the charging heat exchanger in the charging coolant circuit. The battery system may be a power battery system ESS, the vehicle may be a hybrid vehicle or an electric vehicle, etc., and the charging pile cooling system in the charging pile can be mass-produced. The charging heat exchanger may be a water-water heat exchanger, and the water-water heat exchanger is used to realize heat exchange between two liquids.

[0044] See Figure 1 The flow schematic diagram of a charging and cooling method shown, the method mainly includes the following steps S110 and step S120:

[0045] Step S110, during the charging process of the battery system, obtain the real-time temperature value of the battery pack in the battery system.

[0046] When the cooling interface of the charging pile cooling system is connected to the vehicle, the coolant outlet of the charging pile cooling system in the charging pile is connected to the coolant inlet of the charging coolant circuit in the vehicle, and the coolant outlet of the charging coolant circuit in the vehicle is connected to the coolant inlet of the charging pile cooling system in the charging pile. After the charging gun is inserted into the vehicle and the charging pile coolant circuit of the charging pile cooling system is correctly connected to the charging coolant circuit, the charging process can be started. During the charging process, the vehicle controller can detect the real-time temperature value of the battery pack through the temperature sensor set at the battery pack.

[0047] Step S120, according to the real-time temperature value, adjust the power of the vehicle cooling system and the power of the charging pile cooling system to cool the battery system.

[0048] In some possible embodiments, step S120 can be implemented through the following sub-steps:

[0049] Sub-step 1, determine the current temperature range to which the real-time temperature value belongs; wherein, the current temperature range is one of a plurality of preset temperature ranges, and there is no overlap between different temperature ranges.

[0050] The number of preset temperature ranges can be determined according to the actual temperature control accuracy. The more the number of temperature ranges, the higher the temperature control accuracy. The real-time temperature value can be compared with the preset temperature thresholds to determine the current temperature range to which the real-time temperature value belongs. There can be multiple preset temperature thresholds. In one possible implementation, the preset temperature thresholds include the first temperature threshold, the second temperature threshold, the third temperature threshold, and the fourth temperature threshold arranged from large to small. These four temperature thresholds can divide the temperature values into five temperature ranges: the first temperature range of ≥ the first temperature threshold, the second temperature range of [the second temperature threshold, the first temperature threshold), the third temperature range of [the third temperature threshold, the second temperature threshold), the fourth temperature range of [the fourth temperature threshold, the third temperature threshold), and the fifth temperature range of < the fourth temperature threshold. For example, the preset temperature thresholds include 48°C, 45°C, 42°C, and 32°C, and the corresponding temperature ranges include the first temperature range of ≥ 48°C, the second temperature range of [45°C, 48°C), the third temperature range of [42°C, 45°C), the fourth temperature range of [32°C, 42°C), and the fifth temperature range of < 32°C.

[0051] Sub-step 2: Determine whether there is a change in the temperature range of the battery pack according to the current temperature range.

[0052] The current temperature range can be compared with the previously stored temperature range to obtain a comparison result. When the comparison result is different, it is determined that there is a change in the temperature range of the battery pack, and the current temperature range is stored. When the comparison result is the same, it is determined that there is no change in the temperature range of the battery pack.

[0053] It should be noted that when the charging cooling control is first performed after the charging process is started, there is no previous temperature range, and it can be directly determined that there is a change in the temperature range of the battery pack.

[0054] When there is no change in the temperature range of the battery pack, it is determined that the current charging cooling process is over, and then it can be judged whether the battery pack is fully charged. If the charging is not completed, the next charging cooling process is carried out, that is, the real-time temperature value of the battery pack at the next moment is obtained, etc. If the charging is completed, the whole process ends. When there is a change in the temperature range of the battery pack, sub-step 3 is executed.

[0055] Sub-step 3: When there is a change in the temperature range of the battery pack, based on the current temperature range, adjust the power of the vehicle cooling system and the power of the charging pile cooling system.

[0056] When adjusting the power, the cooling function of the charging pile cooling system can be preferentially utilized to reduce the energy loss of the vehicle cooling system.

[0057] In a possible implementation, there are five preset temperature ranges. Based on this, sub-step 3 can be divided into the following five cases:

[0058] 1. When the current temperature range is the first temperature range, control both the vehicle cooling system and the charging pile cooling system to work at their maximum power. Among them, the first temperature range is the temperature range greater than or equal to the preset first temperature threshold.

[0059] At this time, the heat dissipation requirement of the battery pack is very high, and both the vehicle cooling system and the charging pile cooling system are required to cool the battery pack at full power.

[0060] 2. When the current temperature range is the second temperature range, control the vehicle cooling system to work at the first power and the charging pile cooling system to work at its maximum power. Among them, the second temperature range is the temperature range greater than or equal to the preset second temperature threshold and less than the first temperature threshold, the first power is less than the maximum power of the vehicle cooling system; the second temperature threshold is less than the first temperature threshold. It should be noted that the first power can be further divided into multiple power values.

[0061] At this time, the heat dissipation requirement of the battery pack is relatively high, and the charging pile cooling system can be used to cool the battery pack at full power, and the power of the vehicle cooling system can be reduced.

[0062] 3. When the current temperature range is the third temperature range, turn off the vehicle cooling system and control the charging pile cooling system to operate at its maximum power; wherein, the third temperature range is a temperature range greater than or equal to a preset third temperature threshold and less than the second temperature threshold; the third temperature threshold is less than the second temperature threshold.

[0063] At this time, the heat dissipation requirement of the battery pack is average, the charging pile cooling system can cool the battery pack at full power, and the vehicle cooling system is turned off.

[0064] 4. When the current temperature range is the fourth temperature range, turn off the vehicle cooling system and control the charging pile cooling system to operate at the second power; wherein, the fourth temperature range is a temperature range greater than or equal to a preset fourth temperature threshold and less than the third temperature threshold, and the second power is less than the maximum power of the charging pile cooling system; the fourth temperature threshold is less than the third temperature threshold. It should be noted that the second power can be further divided into multiple power values.

[0065] At this time, the heat dissipation requirement of the battery pack is low, the vehicle cooling system can be turned off, and the power of the charging pile cooling system can be reduced.

[0066] 5. When the current temperature range is the fifth temperature range, turn off the vehicle cooling system and the charging pile cooling system; wherein, the fifth temperature range is a temperature range less than the fourth temperature threshold.

[0067] At this time, the heat dissipation requirement of the battery pack is very low, and the vehicle cooling system and the charging pile cooling system can be turned off simultaneously.

[0068] The specific implementation manner of power regulation in the embodiments of the present invention is not limited. In a possible implementation manner, a compressor and an electronic expansion valve EXV are provided in the vehicle cooling system. Changing the rotational speed of the compressor and the opening degree of the electronic expansion valve can both change the flow rate of the coolant in the vehicle cooling system, thereby changing the power of the vehicle cooling system. Based on this, the vehicle controller can adjust the power of the vehicle cooling system by controlling the rotational speed of the compressor and / or the opening degree of the electronic expansion valve in the vehicle cooling system.

[0069] In a possible implementation, the charging pile cooling system includes a charging pile coolant circuit and a cooling module. A ball valve is provided in the charging pile coolant circuit. The cooling module includes a water pump and a main controller. The main controller is respectively connected to the ball valve and the water pump. The main controller can control the rotation of the ball valve and start the water pump to start the charging pile cooling system. The main controller is also communicatively connected to the vehicle controller. Changing the opening degree of the ball valve can change the flow rate of the coolant in the charging pile coolant circuit, thereby changing the power of the charging pile cooling system. Based on this, the vehicle controller can send a power adjustment instruction to the charging pile cooling system, so that the charging pile cooling system adjusts the power of the charging pile cooling system by controlling the opening degree of the ball valve in the charging pile cooling system.

[0070] The above power adjustment instruction may carry demand power information or the real-time temperature value of the battery pack. Based on this, the main controller of the charging pile cooling system can control the opening degree of the ball valve in the charging pile cooling system based on the demand power information and the corresponding relationship between the opening degree of the ball valve and the power stored in advance; the main controller can also compare the real-time temperature value with a preset temperature threshold to determine the current temperature range to which the real-time temperature value belongs, and control the opening degree of the ball valve in the charging pile cooling system based on the preset corresponding relationship between the opening degree of the ball valve and the temperature range.

[0071] In the embodiment of the present invention, the battery system is cooled by using the charging pile cooling system in the charging pile, which improves the heat dissipation power of the battery system during the charging process. At the same time, the charging pile cooling system belongs to an external cooling system and does not need to be arranged on the vehicle, thus alleviating the problems that the vehicle cooling system cannot meet the high-efficiency heat dissipation requirements under high-rate charging and that a high-power cooling system is difficult to be arranged on the vehicle.

[0072] For the sake of easy understanding, the above charging cooling method will be exemplarily introduced below by taking an electric vehicle as an example and based on five temperature ranges divided by four temperature thresholds. Refer to Figure 2 the schematic flow chart of another charging cooling method shown in the figure. The method includes:

[0073] 1. The charging gun is inserted into the electric vehicle.

[0074] 2. Determine whether the liquid cooling pipeline is correctly connected.

[0075] Determine whether the pipeline of the charging pile coolant circuit of the charging pile cooling system is correctly connected to the pipeline of the charging coolant circuit, that is, determine whether the coolant outlet of the charging pile coolant circuit is connected to the coolant inlet of the charging coolant circuit, and whether the coolant outlet of the charging coolant circuit is connected to the coolant inlet of the charging pile coolant circuit. If not, execute step 3; if so, execute step 4.

[0076] 3. Prompt to correctly connect the pipeline. Then re-execute step 2.

[0077] 4. Read the battery pack temperature Ta.

[0078] 5. Determine whether Ta ≥ the first temperature threshold.

[0079] If yes, execute step 6; if no, execute step 10.

[0080] 6. Both the vehicle cooling system and the charging pile cooling system cool the battery pack at full power.

[0081] 7. Determine whether the charging is completed.

[0082] If yes, execute step 8; if no, re - execute step 4.

[0083] 8. Determine whether the liquid - cooling pipeline is correctly disconnected.

[0084] If yes, the process ends; if no, execute step 9.

[0085] 9. Prompt to correctly disconnect the pipeline. Then re - execute step 8.

[0086] 10. Determine whether the second temperature threshold ≤ Ta < the first temperature threshold.

[0087] If yes, execute step 11; if no, execute step 12.

[0088] 11. The charging pile cooling system cools at full power, and the vehicle cooling system reduces the cooling power. Then execute step 7.

[0089] 12. Determine whether the third temperature threshold ≤ Ta < the second temperature threshold.

[0090] If yes, execute step 13; if no, execute step 14.

[0091] 13. The charging pile cooling system cools at full power, and the vehicle cooling system is turned off. Then execute step 7.

[0092] 14. Determine whether the fourth temperature threshold ≤ Ta < the third temperature threshold.

[0093] If yes, execute step 15; if no, execute step 16.

[0094] 15. The charging pile cooling system reduces the cooling power. At this time, keep the vehicle cooling system turned off. Then execute step 7.

[0095] 16. Determine that Ta < the fourth temperature threshold.

[0096] 17. The charging pile cooling system is turned off. At this time, still keep the vehicle cooling system turned off. Then execute step 7.

[0097] The charging and cooling method provided by the embodiment of the present invention can well improve the heat dissipation effect under high-rate charging of the power battery, and save the space and weight of the whole vehicle.

[0098] Corresponding to the above charging and cooling method, the embodiment of the present invention further provides a charging and cooling device, which is applied to the vehicle controller in a vehicle that charges the battery system through a charging pile. Among them, a charging pile cooling system is arranged in the charging pile, a vehicle cooling system and a charging coolant circuit connected to the charging pile cooling system are arranged in the vehicle, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit, and cools the coolant in the charging heat exchanger in the charging coolant circuit.

[0099] See Figure 3 As shown in the structural schematic diagram of a charging and cooling device, the device includes:

[0100] A temperature acquisition module 301, configured to acquire the real-time temperature value of the battery pack in the battery system during the charging process of the battery system;

[0101] A power adjustment module 302, configured to adjust the power of the vehicle cooling system and the power of the charging pile cooling system according to the real-time temperature value to cool the battery system.

[0102] In the embodiment of the present invention, the charging pile cooling system in the charging pile is used to cool the battery system, which improves the heat dissipation power of the battery system during the charging process. At the same time, the charging pile cooling system belongs to an external cooling system and does not need to be arranged on the whole vehicle. Therefore, the problem that the vehicle cooling system cannot meet the high-efficiency heat dissipation requirements under high-rate charging and the high-power cooling system is difficult to be arranged on the whole vehicle is alleviated.

[0103] Further, the power adjustment module 302 is specifically configured to:

[0104] Determine the current temperature range to which the real-time temperature value belongs; wherein, the current temperature range is one of a plurality of preset temperature ranges, and there is no overlap between different temperature ranges;

[0105] Judge whether there is a temperature range change of the battery pack according to the current temperature range;

[0106] When there is a temperature range change of the battery pack, adjust the power of the vehicle cooling system and the power of the charging pile cooling system based on the current temperature range.

[0107] Further, the power adjustment module 302 is further configured to:

[0108] Compare the current temperature range with the previously stored temperature range to obtain a comparison result;

[0109] When the comparison result is different, it is determined that there is a change in the temperature range of the battery pack.

[0110] Furthermore, the power adjustment module 302 is further configured to:

[0111] When the current temperature range is the first temperature range, control both the vehicle cooling system and the charging pile cooling system to operate at their maximum power; wherein, the first temperature range is a temperature range greater than or equal to a preset first temperature threshold;

[0112] When the current temperature range is the second temperature range, control the vehicle cooling system to operate at a first power and the charging pile cooling system to operate at its maximum power; wherein, the second temperature range is a temperature range greater than or equal to a preset second temperature threshold and less than the first temperature threshold, and the first power is less than the maximum power of the vehicle cooling system;

[0113] When the current temperature range is the third temperature range, turn off the vehicle cooling system and control the charging pile cooling system to operate at its maximum power; wherein, the third temperature range is a temperature range greater than or equal to a preset third temperature threshold and less than the second temperature threshold;

[0114] When the current temperature range is the fourth temperature range, turn off the vehicle cooling system and control the charging pile cooling system to operate at a second power; wherein, the fourth temperature range is a temperature range greater than or equal to a preset fourth temperature threshold and less than the third temperature threshold, and the second power is less than the maximum power of the charging pile cooling system;

[0115] When the current temperature range is the fifth temperature range, turn off both the vehicle cooling system and the charging pile cooling system; wherein, the fifth temperature range is a temperature range less than the fourth temperature threshold.

[0116] Furthermore, the power adjustment module 302 is further configured to:

[0117] Adjust the power of the vehicle cooling system by controlling the rotational speed of the compressor and / or the opening degree of the electronic expansion valve in the vehicle cooling system;

[0118] Send a power adjustment command to the charging pile cooling system so that the charging pile cooling system adjusts the power of the charging pile cooling system by controlling the opening degree of the ball valve in the charging pile cooling system.

[0119] The charging and cooling device provided in this embodiment has the same implementation principle and technical effects as those in the foregoing embodiment of the charging and cooling method. For the sake of brief description, for the parts not mentioned in the embodiment of the charging and cooling device, reference may be made to the corresponding content in the foregoing embodiment of the charging and cooling method.

[0120] As Figure 4 shown, a vehicle controller 400 provided in an embodiment of the present invention includes: a processor 401, a memory 402, and a bus. The memory 402 stores a computer program that can run on the processor 401. When the vehicle controller 400 runs, the processor 401 communicates with the memory 402 through the bus, and the processor 401 executes the computer program to implement the above-mentioned charging and cooling method.

[0121] Specifically, the above-mentioned memory 402 and processor 401 can be general-purpose memory and processor, and no specific limitation is made here.

[0122] An embodiment of the present invention also provides a vehicle cooling system. Refer to Figure 5 the schematic diagram of the module composition of a vehicle cooling system shown. It includes the above-mentioned vehicle controller 510, and also includes a vehicle cooling system 520 and a charging coolant circuit 530. The vehicle cooling system 520 is connected to the vehicle controller 510, and the vehicle cooling system 520 and the charging coolant circuit 530 perform heat exchange through a charging heat exchanger 531. When charging the battery system of the vehicle through a charging pile, the charging coolant circuit 530 is connected to a charging pile cooling system 540 in the charging pile, and the charging pile cooling system 540 is connected to the vehicle controller 510; when the charging pile cooling system 540 is started, the charging pile cooling system 540 is communicated with the charging coolant circuit 530, and cools the coolant in the charging heat exchanger 531 in the charging coolant circuit 530.

[0123] The above-mentioned charging heat exchanger 531 can be a water-water heat exchanger.

[0124] During the charging process of the battery system, the vehicle controller 510 can cool the battery system by adjusting the power of the vehicle cooling system 520 and the power of the charging pile cooling system 540. In this way, the charging pile cooling system 540 in the charging pile is additionally used to cool the battery system, improving the heat dissipation power of the battery system during the charging process. At the same time, the charging pile cooling system 540 belongs to an external cooling system and does not need to be arranged on the vehicle, thus alleviating the problems that the vehicle cooling system cannot meet the high-efficiency heat dissipation requirements under high-rate charging and that a high-power cooling system is difficult to be arranged on the vehicle.

[0125] In addition, the charging pile cooling system 540 is not directly connected to the vehicle cooling system 520, but is connected to a separately provided charging coolant circuit 530. The charging coolant circuit 530 then exchanges heat with the vehicle cooling system 520 through a charging heat exchanger. In this way, when there is a coolant leak in the charging pile cooling system 540, it will not affect the vehicle cooling system 520. That is to say, this method of adding the charging coolant circuit 530 based on the charging heat exchanger can avoid the influence of the coolant leak in the charging pile cooling system 540 on the vehicle cooling system 520.

[0126] For ease of understanding, the application scenarios of the above vehicle cooling system will be introduced below in conjunction with Figure 6 As shown in Figure 6 The vehicle cooling system includes a vehicle coolant circuit, a vehicle high-temperature coolant circuit (i.e., the circuit corresponding to the high-temperature coolant inlet IN and the high-temperature coolant outlet OUT on the water-water heat exchanger 2, which is not specifically shown), and a refrigerant circuit. Among them, a water tank, an ESS (power battery system), a water pump, a three-way valve, a Chiller (i.e., a battery cooler), a water-water heat exchanger 1 (i.e., a charging heat exchanger), and a water-water heat exchanger 2 are provided in the vehicle coolant circuit. Ta refers to the real-time temperature value of the ESS; the refrigerant circuit includes a compressor, a condenser, an EXV (i.e., an electronic expansion valve), a Chiller, an SOV (shut-off valve), and an air conditioner. P represents pressure detection, and T represents temperature detection. The charging coolant circuit includes a water-water heat exchanger 1. The charging pile cooling system includes a charging pile coolant circuit and a cooling module. A ball valve Q is provided in the charging pile coolant circuit, and the cooling module includes a pump and a main controller.

[0127] For the refrigerant circuit: In the refrigeration mode, the compressor compresses the low-pressure refrigerant from the air conditioner into a high-temperature and high-pressure gaseous refrigerant. After the high-temperature and high-pressure gaseous refrigerant is condensed by releasing heat through the condenser, it absorbs heat through the air conditioner to lower the temperature inside the vehicle and cool the battery cooler.

[0128] For the vehicle coolant circuit: The water tank is used to store the coolant. The dotted line at the water tank refers to the degassing pipe. The coolant can be, but is not limited to, a mixture of water and ethylene glycol. When the inlet (i.e., the interface connected to the water pump) and the first port (i.e., the interface connected to the Chiller) of the three-way valve are opened, the ESS can be cooled through the Chiller and the water-water heat exchanger 1; when the inlet and the second port (i.e., the interface connected to the water-water heat exchanger 2) of the three-way valve are opened, the ESS can be heated through the water-water heat exchanger 2.

[0129] For the charging pile cooling system: After the coolant circuit of the charging pile is correctly connected to the charging coolant circuit, start the charging pile cooling system. The coolant circuit of the charging pile is connected to the charging coolant circuit. By adjusting the opening degree of Q, the flow rate of the coolant in the coolant circuit of the charging pile can be adjusted, so as to realize the temperature adjustment of the coolant at the water-water heat exchanger 1 in the charging coolant circuit.

[0130] The working principle of the above vehicle cooling system is as follows:

[0131] 1) When the charging pile cooling system is connected to the vehicle, the coolant outlet in the charging pile is connected to the coolant inlet of the charging coolant circuit in the vehicle.

[0132] 2) After the charging pile and the battery pack shake hands successfully, the charging pile reads the battery pack temperature Ta in real time. When Ta≥the first temperature threshold, the main controller of the charging pile controls the ball valve Q in the charging pile to rotate, so that the cooling module in the charging pile and the water-water heat exchanger 1 in the vehicle are kept connected. The whole vehicle starts the compressor and opens the EXV, and the charging pile and the whole vehicle cooling system cool the battery pack (i.e., ESS) at the same time.

[0133] 3) The water pump in the charging pile starts to work. The low-temperature coolant (generally <0°C) enters the water-water heat exchanger 1 from the coolant outlet of the charging pile, exchanges heat with the high-temperature coolant in the water-water heat exchanger 1, the temperature rises and returns to the cooling module in the charging pile. After being cooled to a sufficiently low temperature again, under the action of the water pump, it enters the vehicle again for cooling.

[0134] 4) The water pump in the vehicle is also turned on at the same time, and the low-temperature coolant inside the water-water heat exchanger 1 is sent into the battery water-cooling plate of the ESS to cool the high-temperature battery caused by the ambient temperature and high-current charging, so that the battery is always kept within a safe and efficient temperature.

[0135] 5) The charging pile reads the battery pack cell temperature Ta in real time. If the second temperature threshold ≤ Ta < the first temperature threshold, the main controller of the charging pile controls the ball valve Q in the charging pile to rotate, so that the cooling module in the charging pile and the water-water heat exchanger 1 in the vehicle are kept connected. At the same time, the whole vehicle controls the rotation speed of the compressor and the opening degree of the EXV, and appropriately reduces the power of the whole vehicle cooling system.

[0136] 6) And so on, Ta is compared with more preset temperature thresholds in real time, and the rotation of the charging pile ball valve Q and the power of the whole vehicle cooling system are adjusted according to the strategy, so as to achieve the effect of adjusting the cooling power.

[0137] 7) After charging is completed, the main controller of the charging pile controls the ball valve Q in the charging pile to rotate, so that the cooling module in the charging pile and the water-water heat exchanger 1 in the vehicle are kept disconnected. Disconnect the charging gun and the cooling connection pipeline.

[0138] The vehicle cooling system provided by the embodiment of the present invention has the following beneficial effects:

[0139] 1. The external cooling system (i.e., the charging pile cooling system) can improve the heat dissipation power of the battery pack and solve the high-efficiency heat dissipation requirements under high-rate charging.

[0140] 2. The external cooling system can be unrestricted by the space and weight of the whole vehicle, and can accelerate the charging speed of the whole vehicle.

[0141] In addition, an embodiment of the present invention also provides a vehicle, which includes the above-mentioned vehicle cooling system.

[0142] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, it executes the charging cooling method described in the foregoing method embodiment. The computer-readable storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), RAMs, magnetic disks, or optical discs that can store program codes.

[0143] In all the examples shown and described here, any specific value should be construed as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0144] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to multiple embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order from that marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0145] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in an electrical, mechanical, or other form.

[0146] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0147] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0148] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0149] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A charging and cooling method, characterized in that, A vehicle control unit applied to a vehicle that charges a battery system through a charging pile. A charging pile cooling system is provided inside the charging pile. A vehicle cooling system and a charging coolant circuit connected to the charging pile cooling system are provided inside the vehicle. The vehicle cooling system and the charging coolant circuit exchange heat through a charging heat exchanger. When the charging pile cooling system is started, the charging pile cooling system is connected to the charging coolant circuit and cools the coolant in the charging heat exchanger in the charging coolant circuit. The charging cooling method includes: During the charging process of the battery system, obtaining the real-time temperature value of the battery pack in the battery system; According to the real-time temperature value, adjusting the power of the vehicle cooling system and the power of the charging pile cooling system to cool the battery system.

2. The charging and cooling method according to claim 1, wherein The adjusting the power of the vehicle cooling system and the power of the charging pile cooling system according to the real-time temperature value includes: Determining the current temperature range to which the real-time temperature value belongs; wherein, the current temperature range is one of a plurality of preset temperature ranges, and there is no overlap between different temperature ranges; According to the current temperature range, judging whether there is a temperature range change in the battery pack; When there is a temperature range change in the battery pack, adjusting the power of the vehicle cooling system and the power of the charging pile cooling system based on the current temperature range.

3. The charging and cooling method according to claim 2, characterized in that The judging whether there is a temperature range change in the battery pack according to the current temperature range includes: Comparing the current temperature range with the stored previous temperature range to obtain a comparison result; When the comparison result is different, determining that there is a temperature range change in the battery pack.

4. The charging and cooling method according to claim 2, characterized in that, The adjusting the power of the vehicle cooling system and the power of the charging pile cooling system based on the current temperature range includes: When the current temperature range is the first temperature range, controlling both the vehicle cooling system and the charging pile cooling system to work at their maximum power; wherein, the first temperature range is a temperature range greater than or equal to a preset first temperature threshold; When the current temperature range is the second temperature range, controlling the vehicle cooling system to work at a first power and the charging pile cooling system to work at its maximum power; wherein, the second temperature range is a temperature range greater than or equal to a preset second temperature threshold and less than the first temperature threshold, and the first power is less than the maximum power of the vehicle cooling system; When the current temperature range is the third temperature range, turning off the vehicle cooling system and controlling the charging pile cooling system to work at its maximum power; wherein, the third temperature range is a temperature range greater than or equal to a preset third temperature threshold and less than the second temperature threshold; When the current temperature range is the fourth temperature range, turning off the vehicle cooling system and controlling the charging pile cooling system to work at a second power; wherein, the fourth temperature range is a temperature range greater than or equal to a preset fourth temperature threshold and less than the third temperature threshold, and the second power is less than the maximum power of the charging pile cooling system; When the current temperature range is the fifth temperature range, turn off the vehicle cooling system and the charging pile cooling system; wherein, the fifth temperature range is a temperature range less than the fourth temperature threshold.

5. The charging and cooling method according to any one of claims 1-4, characterized in that The adjusting the power of the vehicle cooling system and the power of the charging pile cooling system includes: Adjust the power of the vehicle cooling system by controlling the rotational speed of the compressor and / or the opening degree of the electronic expansion valve in the vehicle cooling system; Send a power adjustment command to the charging pile cooling system, so that the charging pile cooling system adjusts the power of the charging pile cooling system by controlling the opening degree of the ball valve in the charging pile cooling system.

6. A charging cooling device, characterized in that, Applied to the vehicle controller in a vehicle that charges the battery system through a charging pile, a charging pile cooling system is provided in the charging pile, a vehicle cooling system and a charging coolant circuit connected to the charging pile cooling system are provided in the vehicle, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit, and cools the coolant in the charging heat exchanger in the charging coolant circuit; The charging cooling device includes: A temperature acquisition module, configured to acquire the real-time temperature value of the battery pack in the battery system during the charging process of the battery system; A power adjustment module, configured to adjust the power of the vehicle cooling system and the power of the charging pile cooling system according to the real-time temperature value to cool the battery system.

7. A vehicle controller includes a memory and a processor, and a computer program that can run on the processor is stored in the memory, characterized in that, When the processor executes the computer program, it implements the charging cooling method according to any one of claims 1-5.

8. A vehicle cooling system, characterized in that, Including the vehicle controller according to claim 7, further including a vehicle cooling system and a charging coolant circuit, the vehicle cooling system is connected to the vehicle controller, and the vehicle cooling system and the charging coolant circuit perform heat exchange through a charging heat exchanger; When charging the battery system of the vehicle through a charging pile, the charging coolant circuit is connected to the charging pile cooling system in the charging pile, and the charging pile cooling system is connected to the vehicle controller; when the charging pile cooling system is started, the charging pile cooling system is communicated with the charging coolant circuit, and cools the coolant in the charging heat exchanger in the charging coolant circuit.

9. A vehicle, characterized in that, Including the vehicle cooling system according to claim 8.

10. A computer-readable storage medium, on which a computer program is stored, characterized in that, When the computer program is run by the processor, it executes the charging cooling method according to any one of claims 1-5.

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