Electric vehicle battery heat dissipation control method, electronic device, and storage medium

Abstract

The application discloses an electric vehicle battery heat dissipation control method, an electronic device and a storage medium. The method comprises the following steps: acquiring vehicle navigation information; determining a battery heat dissipation mode according to the vehicle navigation information; when the battery heat dissipation mode is a motor heat dissipation mode, using a motor cooling loop to dissipate heat of the battery, or when the battery heat dissipation mode is a compressor refrigeration mode, using a compressor to refrigerate the battery. According to the navigation information, the battery heat dissipation mode is dynamically determined, so that only the compressor is used to refrigerate the battery, the opening frequency of the compressor during battery refrigeration is reduced, energy consumption is reduced, and noise is improved.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to a method for controlling heat dissipation of electric vehicle batteries, an electronic device, and a storage medium. Background Technology

[0002] As an important component of electric vehicles, batteries generate a lot of heat during charging and discharging, requiring a thermal management system to dissipate heat in a timely manner and ensure that the battery temperature does not exceed a certain threshold.

[0003] Current technology primarily uses compressor cooling to regulate battery temperature. However, compressor cooling increases energy consumption and worsens noise levels, causing significant inconvenience for customers during normal use. Summary of the Invention

[0004] Therefore, it is necessary to address the technical problems of increased energy consumption and noise degradation caused by the use of compressor cooling for battery temperature regulation in existing technologies, and to provide a method for heat dissipation control of electric vehicle batteries, electronic devices, and storage media.

[0005] This invention provides a method for controlling heat dissipation of an electric vehicle battery, comprising:

[0006] Obtain vehicle navigation information;

[0007] Determine the battery cooling mode based on vehicle navigation information;

[0008] When the battery cooling mode is motor cooling mode, a motor cooling circuit is used to cool the battery; or when the battery cooling mode is compressor cooling mode, a compressor is used to cool the battery.

[0009] Furthermore, determining the battery cooling mode based on vehicle navigation information specifically includes:

[0010] Based on the vehicle navigation information, determine the estimated travel time to reach the destination;

[0011] Obtain the battery temperature rise rate by using the motor cooling circuit to dissipate heat from the battery;

[0012] Based on the battery heating rate, calculate the estimated time required for the battery temperature to reach the battery temperature threshold.

[0013] If the estimated driving time is less than or equal to the estimated heating time, the battery cooling mode is determined to be the motor cooling mode; otherwise, the battery cooling mode is determined to be the compressor cooling mode.

[0014] Furthermore, obtaining the battery temperature rise rate by using the motor cooling circuit to dissipate heat from the battery specifically includes:

[0015] Obtain the estimated average speed to reach the destination and the current ambient temperature;

[0016] The battery temperature rise rate is determined by using the motor cooling circuit to dissipate heat from the battery when the current ambient temperature is obtained and the vehicle is running at the estimated average speed.

[0017] Furthermore, the step of calculating the estimated time required for the battery temperature to reach the battery temperature threshold based on the battery heating rate specifically includes:

[0018] Get the current highest battery temperature;

[0019] The estimated time for temperature rise is calculated as: (T1-T2) / X, where T1 is the battery temperature threshold, T2 is the current highest battery temperature, and X is the battery temperature rise rate.

[0020] Furthermore, the method of using a motor cooling circuit to dissipate heat from the battery specifically includes:

[0021] Connect the motor cooling circuit to the battery cooling circuit;

[0022] The heat dissipation device of the motor cooling circuit is activated.

[0023] Furthermore, the heat dissipation device is a cooling fan, and the operation of the heat dissipation device controlling the motor cooling circuit specifically includes:

[0024] Control the cooling fan to run at its initial speed for a preset time;

[0025] The battery's real-time temperature is monitored. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

[0026] Furthermore, the real-time temperature of the battery is monitored. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment, specifically including:

[0027] The speed of the cooling fan is increased at a preset speed rate, and the real-time temperature of the battery is monitored. When the absolute value of the difference between the real-time temperature of the battery and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

[0028] Furthermore, the acquisition of vehicle navigation information specifically includes:

[0029] The system obtains the current highest battery temperature. If the current highest battery temperature is less than the battery temperature threshold, the system obtains vehicle navigation information; otherwise, it uses a compressor to cool the battery.

[0030] This invention provides an electronic device, comprising:

[0031] At least one processor; and,

[0032] A memory communicatively connected to at least one of the processors; wherein,

[0033] The memory stores instructions that can be executed by at least one of the processors to enable at least one of the processors to perform the electric vehicle battery heat dissipation control method as described above.

[0034] The present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all the steps of the electric vehicle battery heat dissipation control method described above.

[0035] This invention dynamically determines the battery cooling mode based on navigation information, avoiding the use of only the compressor to cool the battery, thereby reducing the frequency of compressor operation when the battery is being cooled, reducing energy consumption and improving noise. Attached Figure Description

[0036] Figure 1 This is a flowchart illustrating the heat dissipation control method for an electric vehicle battery according to an embodiment of the present invention.

[0037] Figure 2 This is a flowchart illustrating the heat dissipation control method for an electric vehicle battery according to another embodiment of the present invention.

[0038] Figure 3 A flowchart illustrating the preferred embodiment of an electric vehicle battery heat dissipation control method of the present invention;

[0039] Figure 4 A flowchart illustrating the motor heat dissipation mode of the preferred embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the hardware structure of an electronic device according to the present invention. Detailed Implementation

[0041] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0042] like Figure 1 The diagram shown is a flowchart of a method for controlling the heat dissipation of an electric vehicle battery according to an embodiment of the present invention, including:

[0043] Step S101: Obtain vehicle navigation information;

[0044] Step S102: Determine the battery cooling mode based on the vehicle navigation information;

[0045] Step S103: When the battery heat dissipation mode is motor heat dissipation mode, a motor cooling circuit is used to dissipate heat from the battery; or when the battery heat dissipation mode is compressor cooling mode, a compressor is used to cool the battery.

[0046] Specifically, the present invention can be applied to the electronic control unit (ECU) of a vehicle.

[0047] This embodiment employs not only compressor cooling for battery heat dissipation but also introduces a low-temperature cooling mode—cooling the battery through the motor cooling circuit. The battery cooling mode is dynamically selected based on the customer's navigation information.

[0048] First, step S101 is executed to obtain vehicle navigation information. Vehicle navigation information can be obtained from the vehicle's navigation module based on information about the vehicle's arrival at its destination.

[0049] In one embodiment, the vehicle navigation information includes the estimated average speed of the vehicle to reach its destination and the estimated travel time.

[0050] Then, step S102 is executed to determine the battery cooling mode based on the vehicle navigation information. The battery cooling mode includes a motor cooling mode and a compressor cooling mode. Then, step S103 is executed to apply the determined battery cooling mode.

[0051] The motor cooling mode utilizes a motor cooling circuit to dissipate heat from the battery. This is a low-temperature cooling method. Motor cooling consumes less energy than compressor cooling, and the noise level is lower. Compressor cooling, on the other hand, uses a compressor to cool the battery. Compressor cooling consumes more energy and is noisier, but its cooling effect is superior to motor cooling. Therefore, based on vehicle navigation information, a suitable cooling mode is selected. By choosing the motor cooling mode under appropriate conditions, the compressor's operating frequency is reduced, lowering energy consumption and improving noise levels.

[0052] This invention dynamically determines the battery cooling mode based on navigation information, avoiding the use of only the compressor to cool the battery, thereby reducing the frequency of compressor operation when the battery is being cooled, reducing energy consumption and improving noise.

[0053] like Figure 2 The diagram shown is a flowchart of a method for controlling the heat dissipation of an electric vehicle battery according to another embodiment of the present invention, including:

[0054] Step S201: Obtain the current highest battery temperature. If the current highest battery temperature is less than the battery temperature threshold, obtain vehicle navigation information; otherwise, use a compressor to cool the battery.

[0055] Step S202: Determine the estimated travel time to reach the destination based on the vehicle navigation information.

[0056] Step S203: Obtain the battery temperature rise rate by using the motor cooling circuit to dissipate heat from the battery.

[0057] In one embodiment, obtaining the battery temperature rise rate by using the motor cooling circuit to dissipate heat from the battery specifically includes:

[0058] Obtain the estimated average speed to reach the destination and the current ambient temperature;

[0059] The battery temperature rise rate is determined by using the motor cooling circuit to dissipate heat from the battery when the current ambient temperature is obtained and the vehicle is running at the estimated average speed.

[0060] Step S204: Calculate the estimated time required for the battery temperature to reach the battery temperature threshold based on the battery heating rate.

[0061] In one embodiment, calculating the estimated time required for the battery temperature to reach the battery temperature threshold based on the battery heating rate specifically includes:

[0062] Get the current highest battery temperature;

[0063] The estimated time for temperature rise is calculated as: (T1-T2) / X, where T1 is the battery temperature threshold, T2 is the current highest battery temperature, and X is the battery temperature rise rate.

[0064] Step S205: If the estimated driving time is less than or equal to the estimated heating time, then the battery cooling mode is determined to be the motor cooling mode; otherwise, the battery cooling mode is determined to be the compressor cooling mode.

[0065] Step S206: When the battery heat dissipation mode is motor heat dissipation mode, a motor cooling circuit is used to dissipate heat from the battery; or when the battery heat dissipation mode is compressor cooling mode, a compressor is used to cool the battery.

[0066] In one embodiment, the use of a motor cooling circuit to dissipate heat from the battery specifically includes:

[0067] Connect the motor cooling circuit to the battery cooling circuit;

[0068] The heat dissipation device of the motor cooling circuit is activated.

[0069] In one embodiment, the heat dissipation device is a cooling fan, and the operation of the heat dissipation device controlling the motor cooling circuit specifically includes:

[0070] Control the cooling fan to run at its initial speed for a preset time;

[0071] The battery's real-time temperature is monitored. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

[0072] In one embodiment, the real-time temperature of the battery is monitored. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment, specifically including:

[0073] The speed of the cooling fan is increased at a preset speed rate, and the real-time temperature of the battery is monitored. When the absolute value of the difference between the real-time temperature of the battery and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

[0074] Specifically, this embodiment employs not only compressor cooling for battery heat dissipation but also introduces a low-temperature cooling mode—cooling the battery through the motor cooling circuit. The battery cooling mode is dynamically selected based on the customer's navigation information.

[0075] First, step S201 is executed to obtain the current highest battery temperature. If the current highest battery temperature is too high, exceeding the battery temperature threshold, the compressor is used directly to cool the battery, ensuring that the battery temperature does not become too high and trigger a high-temperature alarm. When the current highest battery temperature is below the battery temperature threshold, vehicle navigation information can be obtained, and step S202 is executed to obtain the vehicle navigation information. This vehicle navigation information can be obtained from the vehicle's navigation module based on information about the vehicle's destination.

[0076] In some embodiments, the current highest battery temperature is obtained. If the current highest battery temperature is less than the battery temperature threshold of the battery under the current vehicle operating conditions, vehicle navigation information is obtained; otherwise, a compressor is used to cool the battery.

[0077] Furthermore, for the comparison of the current highest battery temperature, the battery temperature threshold under the current vehicle operating conditions is used. The battery temperature threshold can be the battery temperature threshold for this particular battery under the current vehicle operating conditions. That is, the corresponding battery temperature threshold is pre-calibrated for this battery according to different operating conditions.

[0078] Then, step S203 is executed to obtain the battery temperature rise rate using the motor cooling circuit to dissipate heat from the battery. The battery temperature rise rate can vary depending on different vehicle and environmental conditions. Experiments can be conducted beforehand to create tables and determine the battery temperature rise rate under different vehicle and environmental conditions.

[0079] In one embodiment, obtaining the battery temperature rise rate by using the motor cooling circuit to dissipate heat from the battery specifically includes:

[0080] Obtain the estimated average speed to reach the destination and the current ambient temperature;

[0081] The battery temperature rise rate is determined by using the motor cooling circuit to dissipate heat from the battery when the current ambient temperature is obtained and the vehicle is running at the estimated average speed.

[0082] Specifically, battery heat generation is closely related to battery current; heat generation power = I 2 *R represents the battery discharge current during driving, which is related to the average vehicle speed. The higher the vehicle speed, the greater the battery discharge current and the greater the heat generation, directly affecting the heat dissipation effect. By using historical big data from the vehicle network, the battery temperature rise rate under different ambient temperatures and average vehicle speeds can be obtained, and then tabulated or fitted into a function. After obtaining the current ambient temperature and the estimated average vehicle speed, the corresponding battery temperature rise rate can be determined.

[0083] Then, step S204 is executed, calculating the estimated time required for the battery temperature to reach the battery temperature threshold based on the battery heating rate. After determining the battery heating rate, the estimated time required for the battery temperature to reach the battery temperature threshold can be calculated.

[0084] In one embodiment, calculating the estimated time required for the battery temperature to reach the battery temperature threshold based on the battery heating rate specifically includes:

[0085] Get the current highest battery temperature;

[0086] The estimated time for temperature rise is calculated as: (T1-T2) / X, where T1 is the battery temperature threshold, T2 is the current highest battery temperature, and X is the battery temperature rise rate.

[0087] Specifically, the battery temperature threshold can be the battery temperature threshold for that particular battery under the current vehicle operating conditions. That is, the corresponding battery temperature threshold is pre-calibrated for different operating conditions. Therefore, when calculating the estimated warm-up time, the corresponding battery temperature threshold is first determined based on the current vehicle operating conditions, and then the estimated warm-up time is calculated.

[0088] This embodiment combines the battery's highest temperature and the battery temperature threshold to calculate the estimated time for temperature rise.

[0089] Then, step S205 is executed, comparing the estimated driving time with the estimated heating time. If the estimated driving time is less than or equal to the estimated heating time, the battery temperature will not exceed the battery temperature threshold before the vehicle reaches its destination. Therefore, the battery cooling mode is determined to be the motor cooling mode, and the low-temperature cooling mode with high energy consumption is selected. Otherwise, since the battery temperature may exceed the battery temperature threshold during vehicle operation, the battery cooling mode is determined to be the compressor cooling mode to ensure that the battery temperature does not exceed the limit threshold.

[0090] This embodiment dynamically selects either compressor cooling mode or low-temperature heat dissipation mode based on customer navigation information and historical big data, prioritizing the energy-efficient low-temperature heat dissipation mode while ensuring that the battery temperature does not exceed the limit threshold.

[0091] Finally, in step S206, the determined battery cooling mode is used to cool the battery.

[0092] In one embodiment, the use of a motor cooling circuit to dissipate heat from the battery specifically includes:

[0093] Connect the motor cooling circuit to the battery cooling circuit;

[0094] The heat dissipation device of the motor cooling circuit is activated.

[0095] Specifically, a motor water pump can be installed in the motor cooling circuit, and a battery water pump can be installed in the battery cooling circuit. The operation of the motor water pump can be controlled to drive the flow of coolant within the motor cooling circuit, and the operation of the battery water pump can be controlled to drive the flow of coolant within the battery cooling circuit. A controllable connecting valve, such as a four-way valve, is installed between the motor cooling circuit and the battery cooling circuit. When the motor cooling circuit is used to dissipate heat from the battery, the controllable connecting valve connects the motor cooling circuit and the battery cooling circuit. Finally, the operation of the heat dissipation device in the motor cooling circuit is controlled, allowing the coolant in the motor cooling circuit to flow into the battery coolant circuit and cool the battery.

[0096] In one embodiment, the heat dissipation device is a cooling fan, and the operation of the heat dissipation device controlling the motor cooling circuit specifically includes:

[0097] Control the cooling fan to run at its initial speed for a preset time;

[0098] The battery's real-time temperature is monitored. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

[0099] Specifically, the heat dissipation device in the motor cooling circuit is a cooling fan. The cooling fan first runs at its initial speed for a preset time, rapidly cooling the coolant in both the motor and battery cooling circuits, thus quickly cooling the battery. Then, when the absolute value of the difference between the battery's real-time temperature and the target temperature is less than or equal to a preset difference threshold (i.e., the battery's real-time temperature is close to the target temperature), the cooling fan is controlled using PID (Proportion Integral Differential) regulation. PID regulation involves proportional, integral, and derivative control. Existing PID algorithms can be used, with the target temperature as the adjustment target, to regulate the cooling fan and keep the battery's real-time temperature near the target temperature. The battery's real-time temperature can be measured by the real-time inlet temperature of the battery cooling circuit. The target temperature of the battery can be a constant, specifically calibrated according to actual needs. For example, room temperature, such as 20°C, can be selected.

[0100] In one embodiment, the real-time temperature of the battery is monitored. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment, specifically including:

[0101] The speed of the cooling fan is increased at a preset speed rate, and the real-time temperature of the battery is monitored. When the absolute value of the difference between the real-time temperature of the battery and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

[0102] Specifically, after the cooling fan runs at its initial speed for a preset time, its speed is increased again at a preset rate to further improve the cooling effect. While increasing the cooling fan speed, the real-time battery temperature is monitored. If the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID regulation.

[0103] This embodiment achieves rapid heat dissipation and cooling of the battery.

[0104] like Figure 3 The diagram shown is a flowchart of a preferred embodiment of an electric vehicle battery heat dissipation control method, comprising:

[0105] Step S301: Determine whether the current highest battery temperature is less than the limit threshold of the battery under the current vehicle operating conditions. If yes, proceed to step S302; otherwise, use a compressor to cool the battery.

[0106] Step S302: Confirm the estimated average vehicle speed V (km / h) and estimated travel time t (min) to reach the destination through navigation;

[0107] Step S303: Confirm the battery temperature rise rate X (°C / min) using low-temperature heat dissipation mode under f (average vehicle speed V, current ambient temperature T) through vehicle big data;

[0108] Step S304: Calculate the estimated time for temperature rise;

[0109] Step S305: If the estimated driving time is less than or equal to the estimated heating time, then use the low temperature cooling mode; otherwise, use the compressor to cool the battery.

[0110] Specifically, in this embodiment, the motor cooling system and the battery cooling system are coupled, and the system circuit is changed according to different heat exchange requirements. In order to use the low-temperature cooling battery to replace the air conditioning system to cool the battery as much as possible, reduce the compressor starting frequency, reduce energy consumption, and at the same time reduce system noise during charging and improve the NVH performance of the whole vehicle.

[0111] In step S301, the controller monitors the current maximum temperature of the battery. If the temperature is less than the maximum temperature threshold of the battery, step S302 is executed to ensure that the battery does not trigger a high temperature alarm. Otherwise, the compressor is used to cool the battery directly.

[0112] In step S302, the estimated average vehicle speed and estimated travel time to the destination are obtained based on the navigation, thus obtaining customer usage information.

[0113] In step S303, the estimated average vehicle speed and current ambient temperature are input into the battery temperature rise rate versus vehicle speed and ambient temperature relationship function f, and big data analysis is performed to obtain the temperature rise rate of the low-temperature heat dissipation mode.

[0114] Step S304: Calculate the estimated heating time. Given that the battery temperature threshold under current vehicle operating conditions is T1, and the current highest battery temperature is T2, the estimated heating time is (T1-T2) / X. During the estimated heating time, a low-temperature cooling mode is used, followed by a compressor cooling mode.

[0115] Finally, step S305 is executed. If the estimated driving time determined by the navigation information at this time is ≤ (battery maximum temperature threshold - current battery maximum temperature) / large data range of battery temperature rise rate, then within the estimated driving time, the low-temperature heat dissipation mode can ensure that the heat dissipation of the battery will not exceed the battery temperature threshold, and the system will adopt the low-temperature heat dissipation mode, i.e., the motor heat dissipation mode. Otherwise, the compressor cooling mode is adopted to ensure that the battery cooling capacity is sufficient and that there is no risk of battery overheating, thus ensuring driving safety. That is, if the estimated driving time is ≤ (T1-T2) / X, the system adopts the low-temperature heat dissipation mode; otherwise, the compressor cooling mode is adopted.

[0116] This embodiment dynamically selects either compressor cooling mode or low-temperature heat dissipation mode based on customer navigation information and historical big data. It prioritizes the energy-efficient low-temperature heat dissipation mode while ensuring the battery temperature does not exceed the current vehicle operating temperature limit. This reduces the frequency of compressor operation during battery cooling, thereby reducing energy consumption and noise.

[0117] like Figure 4 The diagram shown is a flowchart of the motor heat dissipation mode according to the preferred embodiment of the present invention, including:

[0118] Step S401, the battery water pump is activated;

[0119] Step S402, the motor and water pump are activated;

[0120] In step S403, the water valve connecting the motor cooling circuit and the battery cooling circuit is activated;

[0121] Step S404: The motor fan operates at a first threshold speed for a preset time T;

[0122] Step S405: While monitoring the battery inlet temperature, the fan speed increases by a second threshold per unit time;

[0123] In step S406, if the absolute value of the difference between the target battery temperature and the real-time battery temperature is less than or equal to the third threshold, the fan adopts stable PID regulation; otherwise, continue to execute step S405.

[0124] Specifically, when entering the low-temperature heat dissipation mode, i.e., the motor cooling mode, the water valve connecting the motor cooling circuit and the battery cooling circuit needs to be switched to introduce battery cooling water into the motor cooling circuit. For example, a four-way valve can be used as the connecting water valve, controlling its operation to connect the motor cooling circuit and the battery cooling circuit. In the motor cooling mode, the low-temperature radiator in the motor cooling circuit uses a front-end fan to exchange heat with the outside environment, achieving the purpose of cooling the battery.

[0125] Specifically, steps S401 and S402 are executed first, and the battery water pump and the motor water pump work simultaneously.

[0126] Then, step S403 is executed to connect the water valve, such as a four-way water valve, for reversing.

[0127] Then, steps S404 to S406 are executed to control the fan speed. The fan speed can be adjusted according to the battery inlet water temperature, and the specific strategy is as follows:

[0128] In step S404, the fan operates at a first threshold, for example, a starting speed, and maintains this speed for a preset time T. Then, in step S405, the fan speed is controlled by increasing a second threshold every unit of time, for example, increasing the fan speed by 100 rpm every 1 second. Finally, in step S406, if the absolute value of the difference between the target battery temperature and the real-time battery temperature is less than or equal to a third threshold, the fan control enters a stable incremental PID regulation phase. The third threshold is preferably 2°C. The real-time battery temperature is determined using the battery inlet water temperature.

[0129] The control method in this embodiment can ensure that the battery inlet water temperature is not too low or too high, and ensure uniform heat exchange inside the battery.

[0130] like Figure 5 The diagram shown is a hardware structure schematic of an electronic device according to the present invention, comprising:

[0131] At least one processor 501; and,

[0132] A memory 502 is communicatively connected to at least one of the processors 501; wherein,

[0133] The memory 502 stores instructions that can be executed by at least one of the processors to enable the at least one of the processors to perform the electric vehicle battery heat dissipation control method as described above.

[0134] Figure 5 Take a processor 501 as an example.

[0135] The electronic device is preferably an Electronic Control Unit (ECU) of the vehicle. The electronic device may also include an input device 503 and a display device 504.

[0136] The processor 501, memory 502, input device 503 and display device 504 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0137] The memory 502, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the electric vehicle battery heat dissipation control method in the embodiments of this application, for example, Figure 1 , Figure 2 The method flow is shown. The processor 501 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules stored in the memory 502, thereby realizing the electric vehicle battery heat dissipation control method in the above embodiments.

[0138] Memory 502 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the electric vehicle battery heat dissipation control method, etc. Furthermore, memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 502 may optionally include memory remotely located relative to processor 501, and these remote memories may be connected via a network to the apparatus performing the electric vehicle battery heat dissipation control method. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0139] The input device 503 can receive user clicks and generate signal inputs related to user settings and function control of the electric vehicle battery heat dissipation control method. The display device 504 may include a display screen or other display equipment.

[0140] When one or more modules are stored in the memory 502, and are run by one or more processors 501, the electric vehicle battery heat dissipation control method in any of the above method embodiments is executed.

[0141] This invention dynamically determines the battery cooling mode based on navigation information, avoiding the use of only the compressor to cool the battery, thereby reducing the frequency of compressor operation when the battery is being cooled, reducing energy consumption and improving noise.

[0142] One embodiment of the present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all the steps of the electric vehicle battery heat dissipation control method described above.

[0143] 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 method for controlling heat dissipation of an electric vehicle battery, characterized in that, include: Obtain vehicle navigation information; Determine the battery cooling mode based on vehicle navigation information; When the battery cooling mode is motor cooling mode, a motor cooling circuit is used to cool the battery; or when the battery cooling mode is compressor cooling mode, a compressor is used to cool the battery. The step of determining the battery cooling mode based on vehicle navigation information specifically includes: Based on the vehicle navigation information, determine the estimated travel time to reach the destination; Obtain the battery temperature rise rate by using the motor cooling circuit to dissipate heat from the battery; Based on the battery heating rate, calculate the estimated time required for the battery temperature to reach the battery temperature threshold. If the estimated driving time is less than or equal to the estimated heating time, the battery cooling mode is determined to be the motor cooling mode; otherwise, the battery cooling mode is determined to be the compressor cooling mode.

2. The electric vehicle battery heat dissipation control method according to claim 1, characterized in that, The process of obtaining the battery temperature rise rate by using the motor cooling circuit to dissipate heat from the battery specifically includes: Obtain the estimated average speed to reach the destination and the current ambient temperature; The battery temperature rise rate is determined by using the motor cooling circuit to dissipate heat from the battery when the current ambient temperature is obtained and the vehicle is running at the estimated average speed.

3. The electric vehicle battery heat dissipation control method according to claim 1, characterized in that, The step of calculating the estimated time required for the battery temperature to reach the battery temperature threshold based on the battery heating rate specifically includes: Get the current highest battery temperature; The estimated time for temperature rise is calculated as: (T1-T2) / X, where T1 is the battery temperature threshold, T2 is the current highest battery temperature, and X is the battery temperature rise rate.

4. The electric vehicle battery heat dissipation control method according to claim 1, characterized in that, The method of using a motor cooling circuit to dissipate heat from the battery specifically includes: Connect the motor cooling circuit to the battery cooling circuit; The heat dissipation device of the motor cooling circuit is activated.

5. The electric vehicle battery heat dissipation control method according to claim 4, characterized in that, The heat dissipation device is a cooling fan, and the operation of the heat dissipation device controlling the motor cooling circuit specifically includes: Control the cooling fan to run at its initial speed for a preset time; The battery's real-time temperature is monitored. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

6. The electric vehicle battery heat dissipation control method according to claim 5, characterized in that, The method involves monitoring the real-time temperature of the battery. When the absolute value of the difference between the real-time battery temperature and the target temperature is less than or equal to a preset difference threshold, the method controls the cooling fan to perform PID adjustment, specifically including: The speed of the cooling fan is increased at a preset speed rate, and the real-time temperature of the battery is monitored. When the absolute value of the difference between the real-time temperature of the battery and the target temperature is less than or equal to a preset difference threshold, the cooling fan is controlled to perform PID adjustment.

7. The electric vehicle battery heat dissipation control method according to claim 1, characterized in that, The acquisition of vehicle navigation information specifically includes: The system obtains the current highest battery temperature. If the current highest battery temperature is less than the battery temperature threshold, the system obtains vehicle navigation information; otherwise, it uses a compressor to cool the battery.

8. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that can be executed by at least one of the processors to enable at least one of the processors to perform the electric vehicle battery heat dissipation control method as described in any one of claims 1 to 7.

9. A storage medium, characterized in that, The storage medium stores computer instructions, which, when executed by the computer, are used to perform all the steps of the electric vehicle battery heat dissipation control method as described in any one of claims 1 to 7.

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