Cooling system, control method of cooling system and vehicle

Abstract

The invention provides a cooling system, a control method of the cooling system and a vehicle. The cooling system comprises a water pump, a battery device and a control valve, and the water pump, the battery device and the control valve are sequentially connected to a first pipeline in series; the second pipeline is connected between the control valve and the water pump, and the deionization tank is connected to the second pipeline in series; the third pipeline is connected between the control valve and the water pump, and the control valve is configured to be communicated with the second pipeline or the third pipeline in a switchable mode. According to the cooling system provided by the invention, the control valve is arranged, so that the replacement period of the cooling liquid can be slowed down, and the service life of the cooling liquid can be prolonged, thereby reducing the use cost of the cooling system, reducing the probability of insulation faults of the fuel cell system and improving the safety performance.

Description

Technical Field

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

[0002] In the cooling system of the existing solution, when the cooling system is used for a long time or has not been used for a long time, the conductivity of the coolant in the cooling system will increase. The increase in the conductivity of the coolant may cause the battery device to malfunction, which is not conducive to improving the safety performance of the battery device. Therefore, the existing solution generally adopts a cooling replacement solution to reduce the conductivity of the coolant. However, this solution greatly shortens the service life of the coolant, resulting in an increase in the use cost of the cooling system. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide a cooling system, which can.

[0004] The present invention also provides a control method applied to the above cooling system.

[0005] The present invention also provides a vehicle having the cooling system.

[0006] According to the cooling system of the first aspect of the embodiment of the present invention, a water pump, a battery device and a control valve, the water pump, the battery device and the control valve are connected in series on a first pipeline in sequence; a second pipeline and a deionization tank, the second pipeline is connected between the control valve and the water pump, and the deionization tank is connected in series on the second pipeline; a third pipeline, the third pipeline is connected between the control valve and the water pump, wherein the control valve is configured to be switchably connected to the second pipeline or the third pipeline.

[0007] According to the cooling system of the present invention, a control valve is provided to slow down the replacement cycle of the coolant and increase the service life of the coolant, thereby reducing the use cost of the cooling system. At the same time, it can reduce the probability of insulation failure in the fuel cell system and improve safety performance.

[0008] According to some embodiments of the present invention, the cooling system includes: a detector, which is configured to detect the conductivity of the coolant in the cooling system; a controller, which is electrically connected to the detector and the control valve, and controls whether the controller is connected to the second pipeline according to the conductivity detected by the detector.

[0009] According to some embodiments of the present invention, the third pipeline includes: a first branch pipe and a second branch pipe, both ends of the first branch pipe and the second branch pipe are respectively connected to the control valve and the water pump, the cooling system also includes: a radiator, the radiator is connected in series to the first branch pipe, and the control valve is configured to be selectively connected to at least one of the first branch pipe and the second branch pipe.

[0010] According to some optional embodiments of the present invention, the cooling system further comprises: a temperature sensor, wherein the temperature sensor is used to detect the temperature of the coolant in the first pipeline between the battery device and the control valve, and the temperature sensor is electrically connected to the control valve.

[0011] According to some embodiments of the present invention, the control valve is a four-way valve.

[0012] According to some embodiments of the present invention, the cooling system comprises: a supply tank connected to an inlet of the water pump.

[0013] According to a control method of a cooling system according to an embodiment of a second aspect of the present invention, the cooling system is the cooling system according to the first aspect of the present invention, and the control method includes:

[0014] S10, obtaining the conductivity of the coolant in the cooling system;

[0015] S20, comparing the conductivity with a first preset threshold, if the conductivity is greater than or equal to the first preset threshold, executing step S40, if the conductivity is less than the first preset threshold, executing step S50;

[0016] S40, controlling the control valve to communicate with the second pipeline;

[0017] S50, controlling the control valve to communicate with the third pipeline.

[0018] According to the control method of the cooling system of the second aspect of the present invention, applied to the cooling system of the first aspect of the above-mentioned embodiment, a control valve is set on the cooling system, which can slow down the replacement cycle of the coolant and increase the service life of the coolant, thereby reducing the use cost of the cooling system. At the same time, it can reduce the probability of insulation failure in the fuel cell system and improve safety performance.

[0019] According to some optional embodiments of the present invention, after step S20, the control method further includes:

[0020] S31, comparing the conductivity with a second preset threshold, the second preset threshold being greater than the first preset threshold, if the conductivity is less than the second preset threshold, executing step S32, if the conductivity is greater than or equal to the second preset threshold, executing step S33;

[0021] S32, controlling the cooling system to issue an alarm message;

[0022] S33, controlling the cooling system to send out an alarm message to reduce the output power of the battery device.

[0023] According to some embodiments of the present invention, before step S10, the control method further includes:

[0024] S1, energize the battery device and start the low voltage control unit;

[0025] S2, obtaining the insulation value of the high voltage circuit of the battery device;

[0026] S3, comparing the insulation value of the high-voltage circuit with a safety threshold. If the insulation value of the high-voltage circuit is greater than or equal to the safety threshold, starting the vehicle. If the insulation value of the high-voltage circuit is less than the safety threshold, executing step S10.

[0027] According to some optional embodiments of the present invention, if the insulation value of the high-voltage circuit is less than a safety threshold in step S3, and the conductivity is less than a first threshold in step S20, the control method further includes: determining whether other high-voltage systems of the vehicle are faulty.

[0028] According to some embodiments of the present invention, the third pipeline includes: a first branch pipe and a second branch pipe, both ends of the first branch pipe and the second branch pipe are respectively connected to the control valve and the water pump, and a radiator is connected in series to the first branch pipe.

[0029] The control method further comprises:

[0030] S100, detecting the temperature of the coolant in the first pipeline between the battery device and the control valve;

[0031] S200, controlling the control valve to communicate with the first branch pipe and / or the second branch pipe according to the temperature value detected by the temperature sensor.

[0032] According to some optional embodiments of the present invention, step S200 includes:

[0033] S201, comparing the detected temperature value with a first preset temperature threshold, if the temperature value is less than the first preset temperature threshold, executing step S202, if the temperature value is greater than or equal to the first preset temperature threshold, executing step S203;

[0034] S202, controlling the control valve to communicate with the second branch pipe;

[0035] S203, controlling the control valve to communicate with the first branch pipe and the second branch pipe.

[0036] According to some optional embodiments of the present invention, the step S200 further includes:

[0037] S204, comparing the temperature value with a second preset temperature threshold, the second preset temperature threshold being greater than the first preset temperature threshold, if the temperature value is greater than or equal to the first preset temperature threshold and less than the second preset temperature threshold, when the temperature gradually increases to the second preset temperature threshold, executing step S205, if the temperature value is greater than or equal to the second preset temperature threshold, executing step S206,

[0038] S205, controlling the flow cross section between the control valve and the first branch pipe to gradually increase, and controlling the flow cross section between the control valve and the second branch pipe to gradually decrease;

[0039] S206, controlling the control valve to communicate with the first branch pipe, and controlling the flow cross section between the control valve and the first branch pipe to be maximum.

[0040] A vehicle according to an embodiment of a third aspect of the present invention comprises a cooling system according to an embodiment of the first aspect of the present invention.

[0041] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of a cooling system according to an embodiment of the present invention;

[0043] Figure 2 is a schematic diagram of a control method for a cooling system according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] 100. Cooling system;

[0046] 10. Water pump;

[0047] 20. Battery device;

[0048] 30. Control valve;

[0049] 40. Deionization tank;

[0050] 50. Temperature sensor;

[0051] 60. Radiator;

[0052] 70. Supply box;

[0053] 81, first pipeline; 82, second pipeline; 83, third pipeline; 831, first branch pipe; 832, second branch pipe. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0055] Please refer to the following Figure 1-2 A cooling system 100 according to an embodiment of the present invention is described.

[0056] Reference Figure 1 and Figure 2 The cooling system 100 according to an embodiment of the present invention includes: a water pump 10, a battery device 20 and a control valve 30, wherein the water pump 10, the battery device 20 and the control valve 30 are connected in series to a first pipeline 81 in sequence; a second pipeline 82 and a deionization tank 40, wherein the second pipeline 82 is connected between the control valve 30 and the water pump 10, and the deionization tank 40 is connected in series to the second pipeline 82; and a third pipeline 83, wherein the third pipeline 83 is connected between the control valve 30 and the water pump 10, wherein the control valve 30 is configured to be switchably connected to the second pipeline 82 or the third pipeline 83.

[0057] When the cooling system 100 is in use, the control valve 30 is controlled to be connected with the third pipeline 83, and the water pump 10 pumps the coolant in the pipeline into the battery device 20 to dissipate the heat of the battery device 20. Then, the coolant flows back to the water pump 10 through the third pipeline 83 to realize the circulation of the coolant. When the cooling system 100 runs for a long time or does not run for a long time, the control valve 30 is controlled to be connected with the second pipeline 82, and the water pump 10 pumps the coolant in the pipeline into the battery device 20 to dissipate the heat of the battery device 20. Then, the coolant flows to the deionization tank 40 through the second pipeline 82. The deionization tank 40 removes ions in the coolant, thereby reducing the conductivity of the coolant.

[0058] The increased conductivity in the coolant will lead to a decrease in the efficiency of the battery device 20. Under the same current, more energy loss will occur, reducing the energy utilization rate of the system. At the same time, it will corrode the metal parts in the battery device 20, thereby reducing the service life of the battery device 20 and causing malfunctions of the battery device 20, which is not conducive to improving safety of use.

[0059] The cooling system 100 of the present invention is provided with a control valve 30, and the control valve 30 is controlled to be connected with the second pipeline 82. When the conductivity of the coolant is high, the ions in the coolant can be removed, thereby reducing the ion content in the coolant, and then reducing the conductivity of the coolant. Therefore, the replacement cycle of the coolant can be slowed down, and the use time of the coolant can be increased, so the use cost of the cooling system 100 can be reduced and customer satisfaction can be improved. In addition, the solution of using a deionization tank 40 to remove ions to solve the high conductivity of the coolant can reduce the probability of insulation failure in the fuel cell system, improve safety performance, and improve the energy utilization rate of the system, ensuring the service life of the battery device 20. At the same time, the control valve 30 is controlled to be connected with the third pipeline 83, which can effectively exchange heat for the battery device 20, thereby ensuring that the battery device 20 can work at the temperature of the optimal working environment, and then ensuring that the battery device 20 can work normally, effectively improving the stability of the system.

[0060] According to the cooling system 100 of the embodiment of the present invention, the control valve 30 is provided, which can slow down the replacement cycle of the coolant and increase the service life of the coolant, thereby reducing the use cost of the cooling system 100. At the same time, it can reduce the probability of insulation failure of the fuel cell system and improve safety performance.

[0061] According to some embodiments of the present invention, referring to Figure 1 , including: a detector and a controller, the detector is configured to detect the conductivity of the coolant in the cooling system 100; the controller is electrically connected to the detector and the control valve 30, and the controller controls whether the controller is connected to the second pipeline 82 according to the conductivity detected by the detector. Thus, the detector can detect the conductivity of the coolant, thereby ensuring the accuracy of the detection data, and the controller can directly control the control valve 30, thereby improving the response speed of the cooling system 100 and improving the control accuracy of the cooling system 100.

[0062] According to some embodiments of the present invention, referring to Figure 1 The third pipeline 83 includes: a first branch pipe 831 and a second branch pipe 832, both ends of which are respectively connected to the control valve 30 and the water pump 10. Thus, the coolant can flow back to the water pump 10 through the first branch pipe 831 and the second branch pipe 832, so that the coolant can circulate in the cooling system 100.

[0063] Furthermore, if Figure 1As shown, the cooling system 100 also includes: a radiator 60, which is connected in series to the first branch pipe 831, and the control valve 30 is configured to be selectively connected to at least one of the first branch pipe 831 and the second branch pipe 832, that is, the control valve 30 can be connected to the first branch pipe 831, the control valve 30 can also be connected to the second branch pipe 832, and the control valve 30 can also be connected to both the first branch pipe 831 and the second branch pipe.

[0064] Thus, the radiator 60 can dissipate the heat of the coolant, thereby reducing the temperature of the coolant and maintaining the coolant at a relatively low temperature, thereby preventing the water pump 10 from being affected by the excessively high temperature of the coolant.

[0065] According to some optional embodiments of the present invention, referring to Figure 1 The cooling system 100 may further include: a temperature sensor 50, the temperature sensor 50 is used to detect the temperature of the coolant in the first pipeline 81 between the battery device 20 and the control valve 30, and the temperature sensor 50 is electrically connected to the control valve 30. Therefore, the temperature sensor 50 has a simple structure and low cost, so it is convenient for batch use. At the same time, the temperature sensor 50 can ensure the accuracy of detecting the coolant temperature, so that the cooling system 100 can accurately control the control valve 30 according to the coolant temperature.

[0066] According to some embodiments of the present invention, referring to Figure 1 The control valve 30 is a four-way valve. Thus, by providing one control valve 30 , the second pipeline 82 , the first branch pipe 831 , and the second branch pipe 832 can be connected to the first pipeline 81 through the control valve 30 .

[0067] According to some embodiments of the present invention, referring to Figure 1 The cooling system 100 includes a supply tank 70 connected to the inlet of the water pump 10. Thus, the supply tank 70 can supply coolant to the water pump 10, thereby ensuring that there is enough coolant in the cooling system 100, and further ensuring the heat exchange efficiency of the cooling system 100.

[0068] Furthermore, if Figure 1 As shown, the battery device 20 is connected to the supply box 70. Therefore, when the coolant enters the heat exchange flow channel in the battery device 20, the air in the heat exchange flow channel of the battery device 20 can be discharged to the supply box 70, thereby ensuring that the coolant can flow normally in the cooling system 100.

[0069] According to the control method of the cooling system 100 of the second embodiment of the present invention, the cooling system 100 is the cooling system 100 of the first embodiment, referring to Figure 1 and Figure 2 , control methods include:

[0070] S10, obtaining the conductivity of the coolant in the cooling system 100;

[0071] S20, comparing the conductivity with a first preset threshold value, if the conductivity is greater than or equal to the first preset threshold value, executing step S40, if the conductivity is less than the first preset threshold value, executing step S50;

[0072] S40, controlling the control valve 30 to communicate with the second pipeline 82;

[0073] S50 , controlling the control valve 30 to communicate with the third pipeline 83 .

[0074] According to the control method of the cooling system 100 of the second aspect embodiment of the present invention, applied to the cooling system 100 of the first aspect embodiment, a control valve 30 is set on the cooling system 100, which can slow down the replacement cycle of the coolant and increase the service life of the coolant, thereby reducing the use cost of the cooling system 100. At the same time, it can reduce the probability of insulation failure in the fuel cell system and improve safety performance.

[0075] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 2 , after step S20, the control method further includes:

[0076] S31, comparing the conductivity with a second preset threshold value, the second preset threshold value is greater than the first preset threshold value, if the conductivity is less than the second preset threshold value, then executing step S32, if the conductivity is greater than or equal to the second preset threshold value, then executing step S33;

[0077] S32, controlling the cooling system 100 to issue an alarm message;

[0078] S33 , controlling the cooling system 100 to issue an alarm message to reduce the output power of the battery device 20 .

[0079] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , before step S10, the control method further includes:

[0080] S1, power on the battery device 20 and start the low voltage control unit;

[0081] S2, obtaining the insulation value of the high voltage circuit of the battery device 20;

[0082] S3, compare the insulation value of the high-voltage circuit with the safety threshold. If the insulation value of the high-voltage circuit is greater than or equal to the safety threshold, start the vehicle. If the insulation value of the high-voltage circuit is less than the safety threshold, execute step S10.

[0083] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 2 In step S3, if the insulation value of the high-voltage circuit is less than the safety threshold, and in step S20, the conductivity is less than the first threshold, the control method may further include: determining whether other high-voltage systems of the vehicle are faulty. The other high-voltage systems of the vehicle may be an air-conditioning compressor, an intelligent parking system, an intelligent power unit, a motor, etc.

[0084] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The third pipeline 83 includes: a first branch pipe 831 and a second branch pipe 832. Both ends of the first branch pipe 831 and the second branch pipe 832 are connected to the control valve 30 and the water pump 10 respectively. The first branch pipe 831 is connected in series with the radiator 60.

[0085] The control method also includes:

[0086] S100, detecting the temperature of the coolant in the first pipeline 81 between the battery device 20 and the control valve 30;

[0087] S200, according to the temperature value detected by the temperature sensor 50, the control valve 30 is controlled to be connected with the first branch pipe 831 and / or the second branch pipe 832, that is, the control valve 30 can be controlled to be connected with the first branch pipe 831, the control valve 30 can be controlled to be connected with the second branch pipe 832, or the control valve 30 can be controlled to be connected with both the first branch pipe 831 and the second branch pipe 832.

[0088] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 2 , step S200 includes:

[0089] S201, comparing the detected temperature value with a first preset temperature threshold,

[0090] If the temperature value is less than the first preset temperature threshold, step S202 is executed; if the temperature value is greater than or equal to the first preset temperature threshold, step S203 is executed;

[0091] S202, controlling the control valve 30 to communicate with the second branch pipe 832;

[0092] S203 , controlling the control valve 30 to communicate with the first branch pipe 831 and the second branch pipe 832 .

[0093] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 2 , step S200 further includes:

[0094] S204, comparing the temperature value with a second preset temperature threshold, the second preset temperature threshold being greater than the first preset temperature threshold,

[0095] If the temperature value is greater than or equal to the first preset temperature threshold and less than the second preset temperature threshold, when the temperature gradually increases to the second preset temperature threshold, step S205 is executed; if the temperature value is greater than or equal to the second preset temperature threshold, step S206 is executed.

[0096] S205, controlling the flow cross section between the control valve 30 and the first branch pipe 831 to gradually increase, and controlling the flow cross section between the control valve 30 and the second branch pipe 832 to gradually decrease;

[0097] S206 , controlling the control valve 30 to communicate with the first branch pipe 831 , and controlling the flow cross section between the control valve 30 and the first branch pipe 831 to be maximum.

[0098] In this way, the radiator 60 is connected in series to the first branch pipe 831. When the flow cross-section of the first branch pipe 831 reaches the maximum, the radiator 60 can dissipate the heat of the coolant to the maximum extent, thereby effectively reducing the temperature of the coolant and preventing the coolant from damaging structures such as the water pump 10.

[0099] The vehicle according to the third aspect of the present invention comprises the cooling system 100 according to the first aspect of the present invention.

[0100] Please refer to the following Figure 1 and Figure 2 A cooling system 100 according to an embodiment of the present invention is described.

[0101] According to the cooling system 100 of the embodiment of the present invention, Figure 1 As shown, the cooling system 100 is applied to a vehicle, and the cooling system 100 includes: a water pump 10, a battery device 20, a four-way valve, a controller, a deionization tank 40, a temperature sensor 50, a radiator 60, a supply box 70, a detector, a first pipeline 81, a second pipeline 82 and a third pipeline 83.

[0102] Specifically, the water pump 10, the battery device 20 and the four-way valve are connected in series to the first pipeline 81 in sequence, the temperature sensor 50 is connected in series to the first pipeline 81 and is located between the battery device 20 and the four-way valve, the second pipeline 82 is connected between the four-way valve and the water pump 10, the deionization tank 40 is connected in series to the second pipeline 82, and the third pipeline 83 is connected between the four-way valve and the water pump 10.

[0103] The third pipeline 83 includes: a first branch pipe 831 and a second branch pipe 832 . Both ends of the first branch pipe 831 and the second branch pipe 832 are respectively connected to the four-way valve and the water pump 10 . The radiator 60 is connected in series to the first branch pipe 831 .

[0104] The supply tank 70 is in communication with the water pump 10, and the battery device 20 is in communication with the supply tank 70. The controller is electrically connected to the detector and the four-way valve.

[0105] The vehicle is provided with a low-voltage control unit and an engine, and the low-voltage control unit is electrically connected to the water pump 10.

[0106] When the battery device 20 is powered on, the low-voltage control unit is started, and the insulation value of the high-voltage circuit of the battery device 20 is obtained through the power battery management system, and the insulation value of the high-voltage circuit is compared with the safety threshold. If the insulation value of the high-voltage circuit is greater than or equal to the safety threshold, the vehicle is started. The detector detects the temperature of the coolant in the first pipeline 81 between the battery device 20 and the four-way valve, and the controller issues a response strategy based on the coolant temperature.

[0107] If the temperature value is less than the first preset temperature threshold, the engine is in the first stage of hot start. In order to make the flow of the cooling system 100 as small as possible and prevent local overheating, the controller controls the four-way valve to be connected to the second branch pipe 832, and the coolant is pumped from the water pump 10 along the first pipeline 81 to the battery device 20. Then, the coolant flows from the battery device 20 through the four-way valve to the second branch pipe 832, and finally flows to the water pump 10 through the second branch pipe 832.

[0108] If the temperature value is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold, the temperature of the engine cooling system 100 is between the hot start and the temperature and battery efficiency optimum, and the required flow rate is like the maximum flow rate, the controller controls the four-way valve to communicate with the first branch pipe 831 and the second branch pipe 832, and the coolant is pumped from the water pump 10 to the battery device 20 along the first pipeline 81, and then the coolant flows from the battery device 20 through the four-way valve to the first branch pipe 831 and the second branch pipe 832, the coolant flowing through the first branch pipe 831 flows to the water pump 10 through the radiator 60, and the coolant flowing through the second branch pipe 832 flows to the water pump 10 through the second branch pipe 832. When the temperature gradually increases to the second preset temperature threshold, the flow section between the control valve 30 and the first branch pipe 831 is gradually increased, and the flow section between the control valve 30 and the second branch pipe 832 is gradually reduced.

[0109] If the temperature value is greater than or equal to the second preset temperature threshold, the temperature of the cooling system 100 has reached the optimum point of temperature and battery efficiency, and this temperature needs to be maintained while preventing the glass transition temperature of the proton exchange membrane from being reached. The control valve 30 is controlled to be connected to the first branch pipe 831, and the flow cross-section between the control valve 30 and the first branch pipe 831 is controlled to be maximum.

[0110] If the insulation value of the high-voltage circuit is less than the safety threshold, the detector obtains the conductivity of the coolant. If the conductivity is greater than or equal to the first preset threshold, the controller selects a response strategy based on the conductivity. If the conductivity is less than the second preset threshold, the cooling system 100 issues an alarm message. At the same time, the controller issues a response strategy based on the coolant temperature.

[0111] If the conductivity is greater than or equal to the second preset threshold, at this time, the conductivity of the cooling system 100 has seriously exceeded the standard, and the operation of the battery device 20 may cause safety problems. Therefore, the cooling system 100 issues an alarm message and reduces the output power of the battery device 20. At the same time, the controller issues a response strategy based on the coolant temperature. The controller controls the four-way valve to be connected to the second pipeline 82, and the coolant is pumped from the water pump 10 along the first pipeline 81 to the battery device 20. Then, the coolant flows from the battery device 20 through the four-way valve to the second pipeline 82. The coolant flowing through the second pipeline 82 flows to the deionization tank 40. After the deionization tank 40 removes ions in the coolant, the coolant flows to the water pump 10 through the second pipeline 82.

[0112] After the second pipeline 82 is opened for a certain period of time, the detector detects the conductivity in the coolant, and determines whether the four-way valve is connected to the second pipeline 82 and whether the entire vehicle is operating normally based on the conductivity of the coolant. If the conductivity is less than the first preset threshold, the vehicle starts; if the conductivity is greater than or equal to the first preset threshold, the controller selects a response strategy based on the conductivity.

[0113] If the insulation value of the high-voltage circuit is less than the safety threshold and the conductivity is less than the first preset threshold, it is determined whether other high-voltage systems of the vehicle are faulty. The other high-voltage systems of the vehicle may be an air-conditioning compressor, an intelligent parking system, an intelligent power unit, a motor, etc.

[0114] According to the cooling system 100 of the embodiment of the present invention, the control method of the cooling system 100 is applied and the control valve 30 is set, which can slow down the replacement cycle of the coolant and increase the service life of the coolant, thereby reducing the use cost of the cooling system 100. At the same time, it can reduce the probability of insulation failure in the fuel cell system and improve safety performance.

[0115] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0116] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0117] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0118] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0119] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cooling system (100), characterized in that: include: A water pump (10), a battery device (20) and a control valve (30), wherein the water pump (10), the battery device (20) and the control valve (30) are sequentially connected in series to a first pipeline (81); A second pipeline (82) and a deionization tank (40), wherein the second pipeline (82) is connected between the control valve (30) and the water pump (10), and the deionization tank (40) is connected in series to the second pipeline (82); a third pipeline (83), the third pipeline (83) being connected between the control valve (30) and the water pump (10), Wherein, the control valve (30) is configured to be switchably connected to the second pipeline (82) or the third pipeline (83).

2. The cooling system (100) according to claim 1, characterized in that: include: A detector configured to detect the conductivity of the coolant in the cooling system (100); A controller is electrically connected to the detector and the control valve (30), and controls whether the controller is connected to the second pipeline (82) according to the conductivity detected by the detector.

3. The cooling system (100) according to claim 1, characterized in that: The third pipeline (83) comprises: a first branch pipe (831) and a second branch pipe (832), wherein both ends of the first branch pipe (831) and the second branch pipe (832) are respectively connected to the control valve (30) and the water pump (10). The cooling system (100) further comprises: a radiator (60), wherein the radiator (60) is connected in series to the first branch pipe (831), and the control valve (30) is configured to selectively communicate with at least one of the first branch pipe (831) and the second branch pipe (832).

4. The cooling system (100) according to claim 3, characterized in that: Also includes: A temperature sensor (50) is used to detect the temperature of a coolant in a first pipeline (81) between the battery device (20) and the control valve (30), and the temperature sensor (50) is electrically connected to the control valve (30).

5. The cooling system (100) according to claim 3, characterized in that: The control valve (30) is a four-way valve.

6. The cooling system (100) according to claim 1, characterized in that: include: A supply tank (70), the supply tank (70) is connected to the inlet of the water pump (10).

7. A method for controlling a cooling system (100), characterized in that: The cooling system (100) is a cooling system (100) according to any one of claims 1 to 6, and the control method comprises: S10, obtaining the electrical conductivity of the coolant in the cooling system (100); S20, comparing the conductivity with a first preset threshold, if the conductivity is greater than or equal to the first preset threshold, executing step S40, if the conductivity is less than the first preset threshold, executing step S50; S40, controlling the control valve (30) to communicate with the second pipeline (82); S50, controlling the control valve (30) to communicate with the third pipeline (83).

8. The control method of the cooling system (100) according to claim 7, characterized in that: After step S20, the control method further includes: S31, comparing the conductivity with a second preset threshold, the second preset threshold being greater than the first preset threshold, if the conductivity is less than the second preset threshold, executing step S32, if the conductivity is greater than or equal to the second preset threshold, executing step S33; S32, controlling the cooling system (100) to issue an alarm message; S33, controlling the cooling system (100) to issue an alarm message and reduce the output power of the battery device (20).

9. The control method of the cooling system (100) according to claim 7, characterized in that: Before step S10, the control method further includes: S1, energizing the battery device (20) and starting the low voltage control unit; S2, obtaining the insulation value of the high-voltage circuit of the battery device (20); S3, comparing the insulation value of the high-voltage circuit with a safety threshold. If the insulation value of the high-voltage circuit is greater than or equal to the safety threshold, starting the vehicle. If the insulation value of the high-voltage circuit is less than the safety threshold, executing step S10.

10. The control method of the cooling system (100) according to claim 9, characterized in that: If the insulation value of the high-voltage circuit is less than the safety threshold in step S3, and the conductivity is less than the first threshold in step S20, the control method further includes: determining whether other high-voltage systems of the vehicle are faulty.

11. The control method of the cooling system (100) according to claim 7, characterized in that: The third pipeline (83) comprises: a first branch pipe (831) and a second branch pipe (832), both ends of the first branch pipe (831) and the second branch pipe (832) are respectively connected to the control valve (30) and the water pump (10), and the first branch pipe (831) is connected in series with a radiator (60). The control method further comprises: S100, detecting the temperature of the coolant in the first pipeline (81) between the battery device (20) and the control valve (30); S200, controlling the control valve (30) to communicate with the first branch pipe (831) and / or the second branch pipe (832) according to the temperature value detected by the temperature sensor (50).

12. The control method of the cooling system (100) according to claim 11, characterized in that: The step S200 includes: S201, comparing the detected temperature value with a first preset temperature threshold, If the temperature value is less than the first preset temperature threshold, step S202 is executed; if the temperature value is greater than or equal to the first preset temperature threshold, step S203 is executed; S202, controlling the control valve (30) to communicate with the second branch pipe (832); S203, controlling the control valve (30) to communicate with the first branch pipe (831) and the second branch pipe (832).

13. The control method of the cooling system (100) according to claim 12, characterized in that: The step S200 further includes: S204: comparing the temperature value with a second preset temperature threshold, the second preset temperature threshold being greater than the first preset temperature threshold, If the temperature value is greater than or equal to the first preset temperature threshold and less than the second preset temperature threshold, when the temperature gradually increases to the second preset temperature threshold, step S205 is executed; if the temperature value is greater than or equal to the second preset temperature threshold, step S206 is executed. S205, controlling the flow cross section between the control valve (30) and the first branch pipe (831) to gradually increase, and controlling the flow cross section between the control valve (30) and the second branch pipe (832) to gradually decrease; S206, controlling the control valve (30) to communicate with the first branch pipe (831), and controlling the flow cross section between the control valve (30) and the first branch pipe (831) to be maximum.

14. A vehicle, characterized in that: A cooling system (100) comprising any one of claims 1-6.

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