Vehicle control methods

Abstract

This disclosure provides a vehicle control method, belonging to the field of automotive technology. Using this solution, the battery of a vehicle operating in a high-temperature environment is cooled, and the cooling rate of the battery temperature control system is controlled based on the cell temperature. When the difference between the cell temperature and the temperature threshold is large, the temperature control level is high, and the corresponding cooling rate is also large. When the difference between the cell temperature and the temperature threshold is small, the temperature control level is low, and the corresponding cooling rate is also small. Thus, the closer the cell temperature is to the temperature threshold, the smaller the cooling rate of the battery temperature control system, which reduces the frequent start-stop of various working components of the battery temperature control system and helps to increase the service life of the battery temperature control system.

Description

Technical Field

[0001] This disclosure relates to the field of automotive technology, and in particular to a method for vehicle control. Background Technology

[0002] With the development of automotive technology, more and more users are driving hybrid vehicles. When hybrid vehicles are driven in high-temperature environments, the cooling parameters for battery cooling are fixed. However, adjusting the cell temperature with fixed cooling parameters may cause frequent cell temperature fluctuations. For example, when the difference between the cell temperature and the temperature threshold is small, cooling the battery with fixed cooling parameters will quickly lower the cell temperature below the temperature threshold, causing the working components to stop working. However, as the battery supplies power to a low-voltage load, the cell temperature will rise back above the temperature threshold, at which point the battery temperature control system must be controlled to cool the battery again. This leads to frequent start-stop cycles of various working components in the battery temperature control system, thus affecting the lifespan of the battery temperature control system. Summary of the Invention

[0003] This disclosure provides a vehicle control method that can solve the aforementioned technical problems existing in related technologies. The technical solution is as follows:

[0004] Firstly, a vehicle control method is provided, the method being applied to a target vehicle, the method comprising:

[0005] The controller (1) acquires the current ambient temperature and the current cell temperature of the target vehicle's battery;

[0006] When the current ambient temperature is greater than the first ambient temperature threshold, the controller (1) determines the target cooling temperature control level corresponding to the current battery temperature based on the first correspondence between the battery temperature range and the cooling temperature control level stored in advance, wherein the battery temperature range is positively correlated with the cooling temperature control level in the first correspondence.

[0007] The controller (1) determines the target water flow rate corresponding to the target cooling temperature control level based on the second correspondence between the cooling temperature control level and the water flow rate. The second correspondence includes a first cooling temperature control level and a second cooling temperature control level. The first cooling temperature control level corresponds to a first water flow rate in the second correspondence, and the second cooling temperature control level corresponds to a second water flow rate in the second correspondence. When the first cooling temperature control level is greater than the second cooling temperature control level, the first water flow rate is greater than or equal to the second water flow rate.

[0008] The controller (1) controls the battery temperature control system (2) of the target vehicle based on the target water flow rate.

[0009] In one possible implementation, the controller (1) acquires the current cell temperature of the target vehicle's battery, including:

[0010] The controller (1) acquires the cell temperature of the battery at multiple sampling points of the target vehicle's battery;

[0011] The controller (1) selects the highest temperature among the multiple cell temperatures as the current cell temperature.

[0012] In one possible implementation, in the first correspondence:

[0013] When the cell temperature range is 40-42 degrees Celsius, the corresponding cooling temperature control level is the first cooling temperature control level;

[0014] When the cell temperature range is 42-45 degrees Celsius, the corresponding cooling temperature control level is the second cooling temperature control level;

[0015] When the cell temperature range is 45-47 degrees Celsius, the corresponding cooling temperature control level is the third cooling temperature control level.

[0016] In one possible implementation, in the second correspondence:

[0017] The water flow rate corresponding to the first cooling temperature control level is 10 liters per minute;

[0018] The water flow rate corresponding to the second cooling temperature control level is 10 liters per minute;

[0019] The third cooling temperature control level corresponds to a water flow rate of 12 liters per minute.

[0020] In one possible implementation, the controller (1) controls the battery temperature control system (2) of the target vehicle based on the target water flow rate, including:

[0021] The controller (1) determines the target valve opening corresponding to the target water flow rate based on the third correspondence between the pre-stored water flow rate and valve opening.

[0022] The controller (1) controls the proportional valve (21) on the water flow circuit of the battery temperature control system (2) of the target vehicle based on the target valve opening.

[0023] In one possible implementation, the battery temperature control system (2) includes the proportional valve (21), battery compartment (22), first circulation pump (23), first heat exchanger (24), compressor (25), condenser (26), second circulation pump (27), first three-way valve (28), second three-way valve (29) and second heat exchanger (20);

[0024] The proportional valve (21), the heat exchange pipeline of the battery compartment (22) and the first circulating pump (23) are connected in series to form a liquid passage. The two ends of the liquid passage are respectively connected to the first port (28a) of the first three-way valve (28) and the first port (29a) of the second three-way valve (29).

[0025] The two ends of the first heat exchange pipeline of the first heat exchanger (24) are connected to the second port (28b) of the first three-way valve (28) and the second port (29b) of the second three-way valve (29), respectively. The second heat exchange pipeline of the first heat exchanger (24) is connected in series with the compressor (25), the condenser (26) and the second circulating pump (27) to form a loop.

[0026] The two ends of the heat exchange pipeline of the second heat exchanger (20) are connected to the third port (28c) of the first three-way valve (28) and the third port (29c) of the second three-way valve (29), respectively. The second heat exchanger (20) is located in the engine compartment of the target vehicle opposite to the air intake grille.

[0027] The controller (1) is electrically connected to the proportional valve (21), the first circulating pump (23), the second circulating pump (27), the first three-way valve (28), and the second three-way valve (29), respectively.

[0028] The method further includes:

[0029] When the current cell temperature is greater than the cell temperature threshold, the controller (1) controls the first three-way valve (28) to connect the first port (28a) and the second port (28b), and controls the second three-way valve (29) to connect the first port (29a) and the second port (29b), and controls the first circulating pump (23) to work.

[0030] When the current cell temperature is less than the cell temperature threshold, the controller (1) controls the first three-way valve (28) to connect the first port (28a) and the third port (28c), and controls the second three-way valve (29) to connect the first port (29a) and the third port (29c).

[0031] In one possible implementation, the method further includes:

[0032] When the current ambient temperature is less than the second ambient temperature threshold, the controller (1) obtains the current power mode and the current engine coolant temperature of the target vehicle, and determines the target temperature control level corresponding to the current battery temperature, the current power mode and the current engine coolant temperature based on the fourth correspondence between the pre-stored battery temperature, power mode, engine coolant temperature and temperature rise control level.

[0033] The controller (1) determines the target operating parameters corresponding to the target temperature control level based on the fifth correspondence between the temperature control level and the operating parameters of the heating component of the battery temperature control system (2).

[0034] The heating component is controlled based on the target operating parameters.

[0035] In one possible implementation, the method further includes:

[0036] If the current ambient temperature is less than the second ambient temperature threshold, and if the target vehicle's current power mode is hybrid mode, then the engine temperature control system is controlled to heat the battery temperature control system (2).

[0037] In one possible implementation, in the fourth correspondence:

[0038] When the power mode is pure electric mode, the corresponding temperature control level is the first temperature control level.

[0039] When the cell temperature is less than -8 degrees Celsius, the power mode is hybrid mode, and the engine coolant temperature is less than 68 degrees Celsius, the corresponding temperature control level is the second temperature control level.

[0040] When the cell temperature is less than -8 degrees Celsius, the power mode is hybrid mode, and the engine coolant temperature is greater than 68 degrees Celsius, the corresponding temperature control level is the third temperature control level.

[0041] In one possible implementation, in the fifth correspondence:

[0042] The heating element at the first temperature control level is in the "on" state.

[0043] The heating element at the second temperature control level is in the "on" state.

[0044] The heating element for the third temperature control level is in the off state.

[0045] In this disclosure, when cooling the battery of a vehicle operating in a high-temperature environment, the cooling rate of the battery temperature control system is controlled according to the cell temperature. When the difference between the cell temperature and the temperature threshold is large, the temperature control level is high, and the corresponding cooling rate is also large. When the difference between the cell temperature and the temperature threshold is small, the temperature control level is low, and the corresponding cooling rate is also small. In this way, the closer the cell temperature is to the temperature threshold, the smaller the cooling rate of the battery temperature control system, which can reduce the frequent start-stop of various working components of the battery temperature control system and help increase the service life of the battery temperature control system. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a controller for a target vehicle provided in an embodiment of this disclosure;

[0048] Figure 2 This is a schematic diagram of the structure of a battery temperature control system 2 shown in an embodiment of this disclosure;

[0049] Figure 3 This is a schematic diagram of a vehicle control method processing flow shown in an embodiment of this disclosure;

[0050] Figure 4 This is a schematic diagram of a vehicle control processing flow shown in an embodiment of the present disclosure.

[0051] Figure label:

[0052] 1. Controller;

[0053] 2. Battery temperature control system; 20. Second heat exchanger; 21. Proportional valve; 22. Battery compartment; 23. First circulation pump; 24. First heat exchanger; 25. Compressor; 26. Condenser; 27. Second circulation pump; 28. First three-way valve; 28a. First port of the first three-way valve; 28b. Second port of the first three-way valve; 28c. Third port of the first three-way valve; 29. ​​Second three-way valve; 29a. First port of the second three-way valve; 29b. Second port of the second three-way valve; 29c. Third port of the second three-way valve. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0055] This disclosure provides a vehicle control method applied to a target vehicle. Figure 1 This is a schematic diagram of the structure of a controller for a target vehicle provided in an embodiment of the present disclosure. From the perspective of hardware composition, the controller 1 of the target vehicle may include a processor 110, a memory 120 and a communication component 130.

[0056] The processor 110 can be a central processing unit (CPU) or a system on chip (SoC), etc. The processor 110 can be used to process various operation instructions, such as the first correspondence between the pre-stored cell temperature range and the cooling temperature control level.

[0057] The memory 120 may include various volatile or non-volatile memories, such as solid-state disks (SSDs) and dynamic random access memory (DRAM). The memory 120 can be used to store initial data, intermediate data, and result data used in related processing, such as determining the target cooling temperature control level and the target heating temperature control level.

[0058] The communication component 130 can be a wired network connector, an ultra-wideband (UWB) technology module, a wireless fidelity (WiFi) module, a Bluetooth module, a cellular network communication module, etc. The communication component 130 can be used to transmit data with other devices, such as other servers or terminals. For example, it can acquire the current ambient temperature and the current cell temperature of the target vehicle's battery.

[0059] With the development of automotive technology, more and more users are driving hybrid vehicles. When hybrid vehicles operate in high-temperature environments, they use fixed cooling parameters to cool the battery and passenger compartment; in low-temperature environments, they use fixed heating parameters to warm the battery and passenger compartment. The target vehicle's battery temperature control system 2 can, for example... Figure 2 As shown, the battery temperature control system 2 includes a proportional valve 21, a battery compartment 22, a first circulation pump 23, a first heat exchanger 24, a compressor 25, a condenser 26, a second circulation pump 27, a first three-way valve 28, a second three-way valve 29, and a second heat exchanger 20.

[0060] The proportional valve 21, the heat exchange pipeline of the battery compartment 22, and the first circulation pump 23 are connected in series to form a liquid passage. The two ends of the liquid passage are connected to the first port 28a of the first three-way valve 28 and the first port 29a of the second three-way valve 29, respectively. The target vehicle's battery is placed inside the battery compartment 22, and generally, multiple batteries can be installed in each vehicle.

[0061] The two ends of the first heat exchange pipe of the first heat exchanger 24 are connected to the second port 28b of the first three-way valve 28 and the second port 29b of the second three-way valve 29, respectively. In this way, the first heat exchange pipe of the first heat exchanger 24 is connected in series with the proportional valve 21, the battery compartment 22, and the first circulating pump 23 to form a loop. The second heat exchange pipe of the first heat exchanger 24 is connected in series with the compressor 25, the condenser 26, and the second circulating pump 27 to form a loop.

[0062] The two ends of the heat exchange pipe of the second heat exchanger 20 are connected to the third port 28c of the first three-way valve 28 and the third port 29c of the second three-way valve 29, respectively. The second heat exchanger 20 is located in the engine compartment of the target vehicle, opposite to the air intake grille. In this way, the heat exchange pipe of the second heat exchanger 20 is connected in series with the proportional valve 21, the battery compartment 22, and the first circulation pump 23 to form a loop.

[0063] Controller 1 is electrically connected to proportional valve 21, first circulating pump 23, second circulating pump 27, first three-way valve 28, and second three-way valve 29. The controller 1 controls the first three-way valve 28 and the second three-way valve 29 as follows: when the current cell temperature exceeds the cell temperature threshold, controller 1 controls the first three-way valve 28 to connect its first port 28a to its second port 28b, and controls the second three-way valve 29 to connect its first port 29a to its second port 29b, thus controlling the first circulating pump 23 to operate. At this time, the first heat exchange pipe of the first heat exchanger 24 is connected in series with proportional valve 21, battery compartment 22, and first circulating pump 23 to form a loop. In this way, the first heat exchanger 24 can cool the batteries in the battery compartment 22, thereby increasing the electrical conductivity of the batteries in the battery compartment 22. The cell temperature decreases below the cell temperature threshold within a certain period of time. When the current cell temperature is lower than the cell temperature threshold, the controller 1 controls the first three-way valve 28 to connect the first port 28a to the third port 28c, and controls the second three-way valve 29 to connect the first port 29a to the third port 29c. At this time, the heat exchange pipeline of the second heat exchanger 20 is connected in series with the proportional valve 21, the battery compartment 22, and the first circulation pump 23 to form a loop. In this way, the second heat exchanger 20 can cool the battery in the battery compartment 22, so that the cell temperature of the battery in the battery compartment 22 decreases below the cell temperature threshold within a certain period of time. The cell temperature threshold can be preset by technicians. For example, the first cell temperature threshold can be 40 degrees Celsius, 45 degrees Celsius, etc.

[0064] In one possible implementation, embodiments of this disclosure provide a vehicle control method, the processing flow of which can be as follows: Figure 3 As shown, it includes the following steps:

[0065] 301, Controller 1 obtains the current ambient temperature and the current cell temperature of the target vehicle's battery.

[0066] The target vehicle can have a temperature sensor installed on its exterior. This sensor detects the ambient temperature in real time. Controller 1 periodically acquires the ambient temperature detected by the sensor; the period can be preset by technicians. Cell temperature is obtained through a sampling circuit, typically using a negative temperature coefficient (NTC) thermistor. The resistance of an NTC thermistor decreases as the cell temperature increases. The relationship between resistance and temperature is pre-stored, and the cell temperature is determined based on the resistance value. Controller 1 can acquire the cell temperatures at multiple sampling points on the target vehicle's battery. Controller 1 selects the highest of these cell temperatures as the current cell temperature. For example, if the cell temperatures at multiple sampling points are 75°C, 72°C, 73°C, 76°C, and 75°C, then the current cell temperature is 76°C.

[0067] 302. When the current ambient temperature is greater than the first ambient temperature threshold, the controller 1 determines the target cooling temperature control level corresponding to the current battery temperature based on the first correspondence between the pre-stored battery temperature range and the cooling temperature control level.

[0068] The first ambient temperature threshold can be preset by technicians, such as 25 degrees Celsius. In this first correspondence, the cell temperature range is positively correlated with the cooling control level. The first correspondence between cell temperature range and cooling control level can be illustrated in Table 1. In this first correspondence: when the cell temperature range is 40-42 degrees Celsius, the corresponding cooling control level is the first cooling control level; when the cell temperature range is 42-45 degrees Celsius, the corresponding cooling control level is the second cooling control level; and when the cell temperature range is 45-47 degrees Celsius, the corresponding cooling control level is the third cooling control level. For example, if the first ambient temperature threshold is 25 degrees Celsius, and the detected current ambient temperature is 30 degrees Celsius while the cell temperature is 44 degrees Celsius, then the current cooling control level can be found in the above correspondence table to be the second cooling control level.

[0069] Table 1

[0070] Cell temperature range Cooling temperature control level [40,42) First cooling temperature control level [42,45) Second cooling temperature control level [45,47) Third cooling temperature control level

[0071] 303, Controller 1 determines the target water flow rate corresponding to the target cooling temperature control level based on the second correspondence between the cooling temperature control level and the water flow rate.

[0072] The second correspondence includes a first cooling temperature control level and a second cooling temperature control level. The first cooling temperature control level corresponds to a first water flow rate, and the second cooling temperature control level corresponds to a second water flow rate. When the first cooling temperature control level is greater than the second cooling temperature control level, the first water flow rate is greater than or equal to the second water flow rate. The second correspondence between cooling temperature control levels and water flow rates can be illustrated in Table 2, where: the first cooling temperature control level corresponds to a water flow rate of 10 liters per minute, the second cooling temperature control level corresponds to a water flow rate of 10 liters per minute, and the third cooling temperature control level corresponds to a water flow rate of 12 liters per minute.

[0073] Table 2

[0074] Cooling temperature control level water flow velocity First cooling temperature control level 10 liters per minute Second cooling temperature control level 10 liters per minute Third cooling temperature control level 12 liters per minute

[0075] 304. Controller 1 controls the battery temperature control system 2 of the target vehicle based on the target water flow rate.

[0076] The third correspondence between water flow rate and valve opening can be illustrated in Table 3. Based on this pre-stored correspondence, controller 1 determines the target valve opening corresponding to the target water flow rate. Based on the target valve opening, controller 1 controls the proportional valve 21 in the water flow circuit of the battery temperature control system 2 of the target vehicle. For example, if the target water flow rate is 10 liters per minute, the corresponding target valve opening can be determined to be 20% based on the aforementioned third correspondence. Controller 1 adjusts the valve opening of proportional valve 21 to 20%, thereby controlling the battery temperature control system 2.

[0077] Table 3

[0078] water flow velocity Valve opening 10 liters per minute 20％ 12 liters per minute 30％ 14 liters per minute 40％ …… ……

[0079] In one possible implementation, when the current ambient temperature is lower than a second ambient temperature threshold, the process of controller 1 controlling battery temperature control system 2 can be as follows: Figure 4 As shown, it includes the following steps:

[0080] 401. When the current ambient temperature is lower than the second ambient temperature threshold, the controller 1 obtains the current power mode and the current engine coolant temperature of the target vehicle. Based on the pre-stored fourth correspondence between the battery cell temperature, power mode, engine coolant temperature and the temperature rise control level, the controller 1 determines the target temperature rise control level corresponding to the current battery cell temperature, the current power mode and the current engine coolant temperature.

[0081] The second environmental threshold can be preset by technicians, for example, 10 degrees Celsius. The fourth correspondence between cell temperature, power mode, engine coolant temperature, and temperature rise control level can be shown in Table 4.

[0082] Table 4

[0083]

[0084] In the fourth correspondence: when the power mode is pure electric mode, the corresponding temperature control level is the first temperature control level; when the cell temperature is less than -8 degrees Celsius, the power mode is hybrid mode, and the engine coolant temperature is less than 68 degrees Celsius, the corresponding temperature control level is the second temperature control level; when the cell temperature is less than -8 degrees Celsius, the power mode is hybrid mode, and the engine coolant temperature is greater than 68 degrees Celsius, the corresponding temperature control level is the third temperature control level. When the cell temperature is greater than -8 degrees Celsius or the engine coolant temperature is greater than 80 degrees Celsius, controller 1 controls the engine to stop working. At this time, the engine coolant temperature will gradually decrease, but there will still be residual heat to heat the battery in battery compartment 22, and the corresponding temperature control level is the first temperature control level.

[0085] If the target vehicle's current power mode is hybrid mode, then controller 1 controls the engine temperature control system to heat the battery temperature control system 2.

[0086] 402, the controller 1 determines the target operating parameters corresponding to the target temperature control level based on the fifth correspondence between the temperature rise control level and the operating parameters of the heating component of the battery temperature control system 2.

[0087] The heating element of the battery temperature control system 2 can be a positive temperature coefficient (PTC) thermistor, whose resistance increases with increasing temperature. When the heating element is activated, it can heat the battery inside the battery compartment 22. The operating parameters of the heating element can be its on / off state (on and off) or its operating level (e.g., first level, second level, etc.). In the fifth correspondence: the heating element at the first temperature control level is on, the heating element at the second temperature control level is on, and the heating element at the third temperature control level is off. For example, when the current temperature control level is the first level, the controller 1 activates the heating element of the battery temperature control system 2. The fifth correspondence between the temperature control levels and the operating parameters of the heating element of the battery temperature control system 2 can be shown in Table 5.

[0088] Table 5

[0089] Temperature control level Operating parameters of heating components First heating temperature control level Open Second heating temperature control level Open Third temperature control level closure

[0090] 403, Control the heating component based on the target operating parameters.

[0091] Controller 1 controls the heating element to turn on or off according to the target operating parameters.

[0092] In this embodiment of the disclosure, when cooling the battery of a vehicle operating in a high-temperature environment, the cooling rate of the battery temperature control system is controlled according to the cell temperature. When the difference between the cell temperature and the temperature threshold is large, the temperature control level is high, and the corresponding cooling rate is also large. When the difference between the cell temperature and the temperature threshold is small, the temperature control level is low, and the corresponding cooling rate is also small. In this way, the closer the cell temperature is to the temperature threshold, the smaller the cooling rate of the battery temperature control system, which can reduce the frequent start-stop of various working components of the battery temperature control system and help increase the service life of the battery temperature control system.

[0093] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0095] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0096] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and 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.

[0097] It is further understood that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the two components; they can refer to a direct connection between two components without the presence of other components, or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0098] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0099] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the scope of the claims.

[0100] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A method for vehicle control, characterized in that, The method is applied to a target vehicle, and the method includes: The controller (1) acquires the current ambient temperature and the current cell temperature of the target vehicle's battery; When the current ambient temperature is greater than the first ambient temperature threshold, the controller (1) determines the target cooling temperature control level corresponding to the current battery temperature based on the first correspondence between the battery temperature range and the cooling temperature control level stored in advance, wherein the battery temperature range is positively correlated with the cooling temperature control level in the first correspondence. The controller (1) determines the target water flow rate corresponding to the target cooling temperature control level based on the second correspondence between the cooling temperature control level and the water flow rate. The second correspondence includes a first cooling temperature control level and a second cooling temperature control level. The first cooling temperature control level corresponds to a first water flow rate in the second correspondence, and the second cooling temperature control level corresponds to a second water flow rate in the second correspondence. When the first cooling temperature control level is greater than the second cooling temperature control level, the first water flow rate is greater than or equal to the second water flow rate. When the current ambient temperature is less than the second ambient temperature threshold, the controller (1) obtains the current power mode and the current engine coolant temperature of the target vehicle, and determines the target temperature control level corresponding to the current battery temperature, the current power mode and the current engine coolant temperature based on the fourth correspondence between the pre-stored battery temperature, power mode, engine coolant temperature and temperature rise control level. The controller (1) determines the target operating parameters corresponding to the target temperature control level based on the fifth correspondence between the temperature control level and the operating parameters of the heating component of the battery temperature control system (2). The controller (1) controls the battery temperature control system (2) of the target vehicle based on the target water flow rate, and controls the heating component based on the target operating parameters.

2. The method according to claim 1, characterized in that, The controller (1) acquires the current cell temperature of the battery of the target vehicle, including: The controller (1) acquires the cell temperature of the battery at multiple sampling points of the target vehicle's battery; The controller (1) selects the highest temperature among the multiple cell temperatures as the current cell temperature.

3. The method according to claim 1, characterized in that, In the first correspondence: When the cell temperature range is 40-42 degrees Celsius, the corresponding cooling temperature control level is the first cooling temperature control level; When the cell temperature range is 42-45 degrees Celsius, the corresponding cooling temperature control level is the second cooling temperature control level; When the cell temperature range is 45-47 degrees Celsius, the corresponding cooling temperature control level is the third cooling temperature control level.

4. The method according to claim 3, characterized in that, In the second correspondence: The water flow rate corresponding to the first cooling temperature control level is 10 liters per minute; The water flow rate corresponding to the second cooling temperature control level is 10 liters per minute; The water flow rate corresponding to the third cooling temperature control level is 12 liters per minute.

5. The method according to claim 1, characterized in that, The controller (1) controls the battery temperature control system (2) of the target vehicle based on the target water flow rate, including: The controller (1) determines the target valve opening corresponding to the target water flow rate based on the third correspondence between the pre-stored water flow rate and valve opening. The controller (1) controls the proportional valve (21) on the water flow circuit of the battery temperature control system (2) of the target vehicle based on the target valve opening.

6. The method according to claim 1, characterized in that, The battery temperature control system (2) includes a proportional valve (21), a battery compartment (22), a first circulation pump (23), a first heat exchanger (24), a compressor (25), a condenser (26), a second circulation pump (27), a first three-way valve (28), a second three-way valve (29), and a second heat exchanger (20); The proportional valve (21), the heat exchange pipeline of the battery compartment (22) and the first circulating pump (23) are connected in series to form a liquid passage. The two ends of the liquid passage are respectively connected to the first port (28a) of the first three-way valve (28) and the first port (29a) of the second three-way valve (29). The two ends of the first heat exchange pipeline of the first heat exchanger (24) are connected to the second port (28b) of the first three-way valve (28) and the second port (29b) of the second three-way valve (29), respectively. The second heat exchange pipeline of the first heat exchanger (24) is connected in series with the compressor (25), the condenser (26) and the second circulating pump (27) to form a loop. The two ends of the heat exchange pipeline of the second heat exchanger (20) are connected to the third port (28c) of the first three-way valve (28) and the third port (29c) of the second three-way valve (29), respectively. The second heat exchanger (20) is located in the engine compartment of the target vehicle opposite to the air intake grille. The controller (1) is electrically connected to the proportional valve (21), the first circulating pump (23), the second circulating pump (27), the first three-way valve (28), and the second three-way valve (29), respectively. The method further includes: When the current cell temperature is greater than the cell temperature threshold, the controller (1) controls the first three-way valve (28) to connect the first port (28a) and the second port (28b), and controls the second three-way valve (29) to connect the first port (29a) and the second port (29b), and controls the first circulating pump (23) to work. When the current cell temperature is less than the cell temperature threshold, the controller (1) controls the first three-way valve (28) to connect the first port (28a) and the third port (28c), and controls the second three-way valve (29) to connect the first port (29a) and the third port (29c).

7. The method according to claim 1, characterized in that, The method further includes: If the current ambient temperature is less than the second ambient temperature threshold, and if the target vehicle's current power mode is hybrid mode, then the engine temperature control system is controlled to heat the battery temperature control system (2).

8. The method according to claim 1, characterized in that, In the fourth correspondence: When the power mode is pure electric mode, the corresponding temperature control level is the first temperature control level. When the cell temperature is less than -8 degrees Celsius, the power mode is hybrid mode, and the engine coolant temperature is less than 68 degrees Celsius, the corresponding temperature control level is the second temperature control level. When the cell temperature is less than -8 degrees Celsius, the power mode is hybrid mode, and the engine coolant temperature is greater than 68 degrees Celsius, the corresponding temperature control level is the third temperature control level.

9. The method according to claim 8, characterized in that, In the fifth correspondence: The heating element corresponding to the first temperature control level is in the "on" state. The heating element corresponding to the second temperature control level is in the "on" state; The heating element corresponding to the third temperature control level is in the off state.

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