A new energy vehicle thermal management system and a control method thereof

Abstract

This invention provides a thermal management system and control method for new energy vehicles. The thermal management control method includes: acquiring state parameters, including the rainwater level in the water tank and the vehicle's speed in rainy weather; if the state parameters belong to a first target type, cooling the battery using a first cooling method; if the state parameters belong to a second target type, cooling the battery using a second cooling method; and if the state parameters belong to a third target type, cooling the battery using a third cooling method. This invention's thermal management control method can select an appropriate battery cooling method based on the amount of rainfall and the vehicle's speed in rainy weather, thereby reducing energy consumption for battery cooling and achieving greater energy efficiency.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a new energy vehicle thermal management system and its control method. Background Technology

[0002] New energy vehicles refer to vehicles powered by onboard power sources, driven by electric motors, and meeting all road traffic and safety regulations. Generally, hybrid and pure electric vehicles use battery modules composed of several individual battery cells as energy units, with multiple modules connected in series or parallel to provide energy to the entire vehicle. Throughout operation, the battery's temperature, insulation performance, fire resistance, and vibration resistance are subject to very high requirements. Excessive or insufficient battery temperature, or uneven temperature distribution, can lead to battery safety issues or reduce its lifespan. Furthermore, poor insulation performance of the battery module, lack of flame-retardant properties in components, or poor vibration resistance can all have catastrophic consequences. Battery overheating can not only cause spontaneous combustion in new energy vehicles but also affect their driving range. During charging and driving, new energy vehicles may experience excessively high battery temperatures, requiring a cooling system to lower the battery temperature. However, the cooling system of new energy vehicles cannot adapt to different environments; it constantly requires energy from the battery, increasing heat generation and hindering cooling. Summary of the Invention

[0003] Therefore, it is necessary to provide a thermal management system and control method for new energy vehicles to address the problem that current cooling systems for new energy vehicles cannot adjust their cooling methods according to different environmental conditions, which leads to reduced energy utilization and increased battery power consumption.

[0004] The above objectives are achieved through the following technical solutions:

[0005] A control method for a thermal management system of a new energy vehicle, comprising:

[0006] Get the status parameters;

[0007] Among them, the status parameters include the rainwater level in the water tank and the driving speed of the new energy vehicle in rainy weather;

[0008] If the state parameter belongs to the first target type, then the battery is cooled using the first cooling method;

[0009] If the state parameter belongs to the second target type, then the battery is cooled using the second cooling method;

[0010] If the state parameter belongs to the third target type, then the battery is cooled using the third cooling method.

[0011] Furthermore, before obtaining the status parameters, it is also necessary to obtain the battery's temperature status parameters.

[0012] Furthermore, if the battery temperature status parameter is greater than the preset temperature, the target type of the status parameter is determined.

[0013] Furthermore, if the rainwater level in the water tank is greater than the preset height, the state parameter belongs to the first target type, and the battery is cooled using the first cooling method, which includes water cooling.

[0014] Furthermore, the battery has a first region and a second region, both of which are cooled by water.

[0015] Furthermore, if the rainwater level in the water tank is less than the preset height, and the speed of the new energy vehicle in the rain is greater than the preset speed, then the state parameters belong to the second target type, and the battery is cooled by the second cooling method, which includes water cooling and air cooling.

[0016] Furthermore, the battery has a first region and a second region, wherein the first region is cooled by water and the second region is cooled by air.

[0017] Furthermore, if the rainwater level in the water tank is less than the preset height, or the speed of the new energy vehicle in rainy weather is less than the preset speed, then the state parameters belong to the third target type, and the third cooling method is used to cool the battery. The third cooling method includes radiator cooling.

[0018] Furthermore, the battery has a first region and a second region, and the heat sink cools the first region and the second region of the battery.

[0019] The present invention also provides a thermal management system for new energy vehicles, including an acquisition module, the acquisition module being used to acquire status parameters;

[0020] Among them, the status parameters include the rainwater level in the water tank and the driving speed of the new energy vehicle in rainy weather;

[0021] If the status parameter belongs to the first target type, the first execution module is used to execute the first cooling program;

[0022] If the status parameter belongs to the second target type, the second execution module is used to execute the second cooling program;

[0023] The third execution module, if the status parameter belongs to the third target type, is used to execute the third cooling program.

[0024] The beneficial effects of this invention are:

[0025] This invention provides a thermal management system and control method for new energy vehicles. The thermal management control method includes: acquiring state parameters, including the rainwater level in the water tank and the vehicle's speed in rainy weather; if the state parameters belong to a first target type, cooling the battery using a first cooling method; if the state parameters belong to a second target type, cooling the battery using a second cooling method; and if the state parameters belong to a third target type, cooling the battery using a third cooling method. This thermal management control method allows for the selection of an appropriate battery cooling method based on rainfall and the vehicle's speed in rainy weather, thereby reducing energy consumption for battery cooling and improving energy efficiency. Attached Figure Description

[0026] Figure 1 A flowchart of a control method for a thermal management system for a new energy vehicle provided in an embodiment of the present invention;

[0027] Figure 2 This is a structural diagram of a thermal management system for a new energy vehicle provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram illustrating the working principle of a thermal management control method for new energy vehicles, as provided in an embodiment of the present invention.

[0029] Figure 4 for Figure 3 The diagram showing the working principle of the water storage tank excluding the other corner.

[0030] in:

[0031] 100. Battery; 110. Drain pipe; 120. Water inlet; 130. Connecting pipe; 140. Rainwater cooling pipe; 150. Internal cooling pipe; 200. Water storage tank; 300. First valve; 400. Second valve; 500. Third valve; 600. Fourth valve; 700. Radiator pipe; 800. Acquisition module; 901. First execution module; 902. Second execution module; 903. Third execution module. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0033] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] The following reference Figures 1 to 4 This application describes a new energy vehicle thermal management system and its control method provided in one embodiment.

[0036] like Figure 1 As shown, a thermal management control method for new energy vehicles includes the following steps:

[0037] S1: Get the status parameters;

[0038] Among them, the status parameters include the rainwater level in the water tank 200 and the driving speed of the new energy vehicle in rainy weather.

[0039] S2: If the state parameter belongs to the first target type, then cool the battery 100 using the first cooling method;

[0040] S3: If the state parameter belongs to the second target type, then cool the battery 100 using the second cooling method;

[0041] S4: If the state parameter belongs to the third target type, then cool the battery 100 using the third cooling method.

[0042] On rainy days, for safety reasons, cars generally travel at slower speeds on the road, and new energy vehicles are no exception. During driving, new energy vehicles provide energy to the motor by discharging the battery 100. The battery 100 generates heat during both charging and discharging. Since the driving speed of vehicles on rainy days is generally slower than that of vehicles in normal weather, the heat generated during the discharge process of the battery 100 will also be less than normal. When the temperature status parameter of the battery 100 (the temperature status parameter refers to the surface temperature of the battery 100) is higher than the preset value (the preset temperature refers to the temperature threshold at which the temperature of the battery 100 reaches the temperature that needs to be cooled down), the status parameters are acquired. The status parameters include the rainwater level in the water tank 200 of the new energy vehicle on rainy days and the driving speed of the new energy vehicle on rainy days.

[0043] Specifically, when the rainwater level in the water tank 200 exceeds a height threshold (i.e., a preset height), the state parameter belongs to the first target type (the first target type refers to a situation where a new energy vehicle is driving in a rainy environment with heavy rainfall). A first cooling method is used to cool the battery 100, which includes water cooling. The new energy vehicle is equipped with a water tank 200, which has an inlet 120. During rainy weather, the inlet 120 opens, allowing rainwater to enter the water tank 200. A connecting pipe 130 is located on one side of the water tank 200, and a rainwater cooling pipe 140 surrounds the battery 100. A first valve 300 is located between the connecting pipe 130 and the rainwater cooling pipe 140. When the new energy vehicle is driving in an environment with heavy rainfall, the water tank 200 stores a large amount of rainwater. When the rainwater level in the water tank 200 exceeds the height threshold... (i.e., preset height), the first valve 300 opens, and the rainwater in the water storage tank 200 enters the rainwater cooling pipe 140. Since the cooling pipe 140 surrounds the battery 100, it cools the battery 100. The rainwater cooling pipe 140 is equipped with a drain pipe 110. After the water cooling is completed, the rainwater is discharged through the drain pipe 110. Since the temperature in rainy weather is relatively low compared to normal weather, the cooling effect of the rainwater can also meet the cooling requirements of the battery 100, saving energy. At the same time, after the rainwater has cooled the battery 100, it is discharged through the drain pipe 110, which does not cause any pollution to the environment, thus saving energy and protecting the environment.

[0044] Specifically, when the rainwater level in the water tank 200 is lower than the height threshold (i.e., the preset height), and the new energy vehicle is traveling at a speed greater than the preset speed in the rain, the state parameters belong to the second target type (the second target type refers to a situation where the new energy vehicle is traveling at a relatively high speed in a rainy environment with low rainfall). The battery 100 is then cooled using a second cooling method, which includes water cooling and air cooling. The fact that the rainwater level in the water tank 200 is lower than the height threshold (i.e., the preset height) indicates that there is little rainwater. The first valve 300 opens, allowing a small amount of rainwater to enter the rainwater cooling pipe 140, dividing the battery 100 into a first region and a second region. The first region is vertically above the second region. A second valve 400 is installed between the rainwater cooling pipe 140 of the first region and the rainwater cooling pipe 140 of the second region. The second valve 400 can control the rainwater cooling pipe 140 of the first region. The connection between the rainwater cooling pipe 140 in the first area and the rainwater cooling pipe 140 in the second area is such that a small amount of rainwater adheres tightly to the bottom of the rainwater cooling pipe 140 due to gravity, thereby cooling the first area of ​​the battery 100. Due to gravity, a small amount of rainwater adheres tightly to the bottom of the rainwater cooling pipe 140 in the second area, resulting in a gap between the rainwater cooling pipe 140 in the second area and the battery 100, leading to poor cooling effect. Therefore, the second valve 400 is closed, and other cooling methods are used for the second area. A third valve 500 is installed on the rainwater cooling pipe in the second area, which is connected to the outside air. Since the speed of the new energy vehicle in the rain is greater than the preset speed, it indicates that the wind speed in the second area has reached the standard for air cooling. The third valve 500 is opened to allow outside air to enter the rainwater cooling pipe 140 in the second area to cool the second area of ​​the battery 100.

[0045] It is understandable that the first area of ​​the battery 100 is cooled by water cooling and the second area of ​​the battery 100 is cooled by air cooling. Even if rainwater cannot effectively cool the battery 100 on rainy days with light rainfall, air cooling can be used as an auxiliary cooling method to meet the cooling requirements of the battery 100. At the same time, neither water cooling nor air cooling requires additional energy supply, which further reduces the heat generated by the discharge of the battery 100.

[0046] Specifically, when the water level in the water tank 200 is below the height threshold (i.e., the preset height), and the new energy vehicle's speed is below the preset speed, the state parameters fall under the third target type (the third target type refers to a situation where the new energy vehicle is in a rainy environment with low rainfall and a slow driving speed). In this case, the third cooling method is used to cool the battery 100. The third cooling method includes radiator cooling. The fact that the water level in the water tank 200 is below the height threshold (i.e., the preset height) indicates that the rainfall is insufficient, and water cooling is inadequate to meet the cooling requirements of the battery 100. The fact that the new energy vehicle's speed is below the preset speed also indicates that air cooling is insufficient. To meet the cooling requirements of battery 100, a radiator is needed to cool it down. Internal cooling pipes 150 are arranged around battery 100. The radiator connects to these pipes to cool the battery 100. A radiator pipe 700 is installed within the radiator area. A fourth valve 600 is installed between the water tank 200 and the radiator pipe 700. Opening the fourth valve 600 allows a small amount of rainwater to enter the radiator area. This small amount of rainwater cools the radiator, reducing the power supply required from battery 100 and improving its cooling effect. The radiator then cools the battery 100, thus increasing its cooling efficiency.

[0047] It is understandable that even with less rainfall, water cooling may not be sufficient to meet the cooling requirements. Additionally, new energy vehicles travel at slower speeds in the rain, so air cooling may not be effective either. However, there is still the radiator cooling method, which directs rainwater into the radiator area, allowing the rainwater to cool the radiator and improving its cooling efficiency.

[0048] The thermal management control method for new energy vehicles can select the appropriate cooling method for the battery 100 based on the amount of rainfall and the driving speed of the new energy vehicle in rainy weather. This reduces some of the heat generated by the battery 100 supplying energy to the cooling system when the new energy vehicle is driving in the rain, thereby reducing the energy consumption for cooling the battery 100 in rainy weather and making it more energy-efficient.

[0049] In a further embodiment, the present invention provides a new energy vehicle thermal management system, including an acquisition module 800, which is used to acquire status parameters;

[0050] Among them, the status parameters include the rainwater level in the water tank 200 and the driving speed of the new energy vehicle in rainy weather.

[0051] If the status parameter belongs to the first target type, the first execution module 901 is used to execute the first cooling program;

[0052] If the status parameter belongs to the second target type, the second execution module 902 is used to execute the second cooling program;

[0053] If the status parameter belongs to the third target type, the third execution module 903 is used to execute the third cooling program;

[0054] Specifically, the acquisition module 800 includes a first sensor and a second sensor. The first sensor can sense the level of rainwater in the water storage tank 200, and the second sensor can sense the driving speed of the new energy vehicle in the rain.

[0055] The first execution module 901 includes a first control switch, which can start a first cooling program;

[0056] The second execution module 902 includes a second control switch, which can start a second cooling program;

[0057] The third execution module 903 includes a third control switch, which can start a third cooling program. When the first sensor detects that the water level in the water tank 200 is higher than the preset height, the first control switch starts the first cooling program, causing the first valve 300 and the second valve 400 to open, and the third valve 500 and the fourth valve 600 to close, thereby starting the first cooling program and enabling the new energy vehicle thermal management system to cool the battery 100 in the first cooling method.

[0058] When the first sensor detects that the water level in the water tank 200 is lower than the preset height, and the second sensor detects that the new energy vehicle is traveling at a speed higher than the preset speed in the rain, the second control switch activates the second cooling program, causing the first valve 300 and the third valve 500 to open, and the second valve 400 and the fourth valve 600 to close, thereby starting the second cooling program and enabling the new energy vehicle thermal management system to cool the battery 100 in the second cooling method.

[0059] When the first sensor detects that the water level in the water tank 200 is lower than the preset height, and the second sensor detects that the new energy vehicle is traveling at a speed lower than the preset speed in the rain, the third control switch activates the third cooling program, causing the second valve 400, the third valve 500, and the fourth valve 600 to open, and the first valve 300 to close, thereby initiating the third cooling program and enabling the new energy vehicle thermal management system to cool the battery 100 using the third cooling method.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A thermal management control method for new energy vehicles, characterized in that, include: Get the status parameters; Among them, the status parameters include the rainwater level in the water tank and the driving speed of the new energy vehicle in rainy weather; If the state parameter belongs to the first target type, the battery is cooled by the first cooling method. If the rainwater level in the water tank is greater than the preset height, the state parameter belongs to the first target type, and the battery is cooled by the first cooling method, which includes water cooling. If the state parameter belongs to the second target type, the battery is cooled by the second cooling method. If the rainwater level in the water tank is less than the preset height and the speed parameter of the new energy vehicle in rainy weather is greater than the preset speed, the state parameter belongs to the second target type and the battery is cooled by the second cooling method. The second cooling method includes water cooling and air cooling. If the state parameter belongs to the third target type, the battery is cooled by the third cooling method. If the rainwater level in the water tank is less than the preset height, or the speed of the new energy vehicle in rainy weather is less than the preset speed, the state parameter belongs to the third target type, and the battery is cooled by the third cooling method, which includes radiator cooling.

2. The thermal management control method for new energy vehicles according to claim 1, characterized in that, Before obtaining the status parameters, it is also necessary to obtain the battery's temperature status parameters.

3. The thermal management control method for new energy vehicles according to claim 2, characterized in that, If the battery temperature status parameter is greater than the preset temperature, then determine the target type of the status parameter.

4. The thermal management control method for new energy vehicles according to claim 1, characterized in that, The battery has a first region and a second region, both of which are cooled by water.

5. The thermal management control method for new energy vehicles according to claim 1, characterized in that, The battery has a first region and a second region. The first region is cooled by water cooling, and the second region is cooled by air cooling.

6. The thermal management control method for new energy vehicles according to claim 1, characterized in that, The battery has a first region and a second region, and the heat sink cools the first region and the second region of the battery.

7. A thermal management system for new energy vehicles, characterized in that, It includes an acquisition module, which is used to acquire status parameters; Among them, the status parameters include the rainwater level in the water tank and the driving speed of the new energy vehicle in rainy weather; If the status parameter belongs to the first target type, the first execution module is used to execute the first cooling program. If the rainwater level in the water tank is greater than the preset height, the status parameter belongs to the first target type, and the battery is cooled by the first cooling method, which includes water cooling. The second execution module, if the status parameter belongs to the second target type, executes the second cooling program. If the rainwater level in the water tank is less than the preset height and the new energy vehicle's driving speed in the rain is greater than the preset speed, then the status parameter belongs to the second target type, and the battery is cooled by the second cooling method. The second cooling method includes water cooling and air cooling. The third execution module, if the status parameter belongs to the third target type, is used to execute the third cooling procedure. If the rainwater level in the water tank is less than the preset height and the driving speed of the new energy vehicle in rainy weather is less than the preset speed, then the status parameter belongs to the third target type, and the third cooling method is used to cool the battery. The third cooling method includes radiator cooling.

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