CN117818296A

CN117818296A - Vehicle battery cooling method and device, electronic equipment and storage medium

Info

Publication number: CN117818296A
Application number: CN202410147528.5A
Authority: CN
Inventors: 李元伟
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2024-01-31
Filing date: 2024-01-31
Publication date: 2024-04-05

Abstract

The embodiment of the application relates to a vehicle battery cooling method, a device, electronic equipment and a storage medium, wherein the method comprises the following steps: determining the current corresponding environment temperature, load information and vehicle speed of the vehicle; determining a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature; determining a predicted heating value of the battery based on the vehicle speed, the load information and the ambient temperature; determining whether the predicted heating value meets a battery cooling condition; if the battery cooling condition is met, determining the target refrigerating power of an air conditioner on the vehicle based on the predicted heating value; and controlling the air conditioner to operate according to the target refrigeration power in response to the fact that the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle so as to adjust the actual temperature of the battery to the cooling target temperature. According to the embodiment of the application, the cooling trigger temperature, the cooling target temperature and the air conditioner refrigerating power can be adaptively adjusted, so that the battery is cooled by smaller refrigerating power in the vehicle journey, and the consumption of battery energy is reduced.

Description

Vehicle battery cooling method and device, electronic equipment and storage medium

Technical Field

The application relates to the technical field of intelligent automobiles, in particular to a vehicle battery cooling method, a device, electronic equipment and a storage medium.

Background

The power battery of an electric automobile generates heat during discharging, which is an inherent characteristic of the battery. The current electric automobile generally comprises a battery thermal management system, when the temperature of the battery is increased, the power battery is cooled, and the temperature of the battery is kept within a certain range, so that the battery can be supported to work efficiently, and the performance of the whole automobile is ensured to be normal. The battery cooling scheme of the current electric automobile is mostly controlled by a single system, namely, the thermal management system only carries out trigger type cooling on the battery temperature. For example, the optimal working temperature range of the battery is 20-40 ℃, the safety limit temperature is 55 ℃, the battery discharges and generates heat when the vehicle runs in the environment of 39 ℃ with high temperature, the temperature of the battery gradually rises and breaks through 43 ℃, and then an air conditioner is triggered to cool the battery until the temperature of the battery is reduced to be lower than the target value of 38 ℃ again. Repeatedly, the thermal management system controls the temperature of the battery.

The scheme of controlling battery cooling by a single system of the thermal management system is simple and direct, the cooling function is started by triggering the air conditioner through the real-time temperature of the battery, the refrigerating power of the air conditioner is a preset value, and the cooling time is not controlled, so that more energy consumption is wasted. The specific mode is that the battery cooling liquid is cooled by an air conditioning refrigerant, and then the battery cooling liquid is conveyed to the power battery through the electronic pump to cool each battery cell unit. That is, the cooling is turned on when the battery temperature reaches the trigger value, and is turned off when the battery temperature reaches the target value, and the cooling target value is generally set lower, so that the cooling operation is prevented from being triggered when the battery is just withdrawn. The refrigeration power is generally set stronger, the battery temperature is prevented from being raised due to insufficient cooling, the cooling time is generally not set, the overall purpose is to finish battery cooling as soon as possible, and the battery temperature is prevented from being raised too much, so that the air conditioner in the prior scheme has larger power consumption, and further the endurance mileage of the vehicle can be shortened.

Disclosure of Invention

In view of the above, in order to solve some or all of the above technical problems, embodiments of the present application provide a method, an apparatus, an electronic device, and a storage medium for cooling a vehicle battery.

In a first aspect, embodiments of the present application provide a method for cooling a vehicle battery, the method including: determining the current corresponding environment temperature, load information and vehicle speed of the vehicle; determining a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature; determining a predicted heating value of the battery based on the vehicle speed, the load information and the ambient temperature; determining whether the predicted heating value meets a battery cooling condition; if the battery cooling condition is met, determining the target refrigerating power of an air conditioner on the vehicle based on the predicted heating value; and controlling the air conditioner to operate according to the target refrigeration power in response to the fact that the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle so as to adjust the actual temperature of the battery to the cooling target temperature.

In one possible embodiment, determining the predicted heating value of the battery based on the vehicle speed, the load information, and the ambient temperature includes: determining a discharge power of the battery based on the vehicle speed, the load information and the ambient temperature; based on the discharge power, a predicted heating value of the battery is determined.

In one possible embodiment, determining the predicted heating value of the battery based on the discharge power includes: determining the current residual electric quantity of the battery; and searching predicted heating values corresponding to the discharge power and the residual electric quantity from a first pre-established corresponding relation table.

In one possible embodiment, determining a target cooling power of an air conditioner on a vehicle based on a predicted heating value includes: and searching target refrigerating power of the air conditioner corresponding to the predicted heating value and the residual electric quantity from a second pre-established corresponding relation table, wherein the target refrigerating power is the minimum power of the air conditioner for adjusting the temperature of the battery to the cooling target temperature.

In one possible embodiment, determining whether the predicted heating value meets the battery cooling condition includes: acquiring heat radiation attribute information of the battery, wherein the heat radiation attribute information represents the heat radiation speed degree of the battery under the condition of natural heat radiation; determining a predicted temperature of the battery based on the predicted heating value, the ambient temperature, and the heat dissipation attribute information; and if the predicted temperature is greater than or equal to the battery cooling trigger temperature, determining that the predicted heating value accords with the battery cooling condition.

In one possible embodiment, after controlling the air conditioner to operate at the target cooling power, the method further includes: and controlling the air conditioner to operate according to the preset refrigeration power so as to adjust the actual temperature of the battery to the cooling target temperature in response to the fact that the actual temperature of the battery is larger than the battery cooling trigger temperature and the difference value between the actual temperature and the battery cooling trigger temperature is larger than or equal to the preset temperature difference threshold.

In one possible embodiment, after determining whether the predicted heating value meets the battery cooling condition, the method further includes: if the predicted heating value does not accord with the battery cooling condition, determining the target heating value of the battery corresponding to the battery cooling trigger temperature; a first target vehicle speed of the vehicle is determined based on the target heat generation amount, the load information, and the ambient temperature, and the vehicle speed of the vehicle is adjusted to the first target vehicle speed.

In one possible embodiment, after determining whether the predicted heating value meets the battery cooling condition, the method further includes: if the predicted heating value accords with the battery cooling condition, determining the lowest allowable speed of the vehicle based on preset travel information; if the current speed of the vehicle is greater than the minimum allowable speed, determining a second target speed of the vehicle based on the minimum allowable speed, and adjusting the speed of the vehicle to the second target speed.

In a second aspect, embodiments of the present application provide a vehicle battery cooling apparatus, the apparatus including: the first determining module is used for determining the current corresponding environment temperature, load information and vehicle speed of the vehicle; a second determining module for determining a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature; a third determination module for determining a predicted heating value of the battery based on the vehicle speed, the load information, and the ambient temperature; a fourth determination module for determining whether the predicted heating value meets the battery cooling condition; a fifth determining module for determining a target cooling power of an air conditioner on the vehicle based on the predicted heating value if the battery cooling condition is met; and the first control module is used for controlling the air conditioner to operate according to the target refrigeration power in response to the fact that the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle so as to adjust the actual temperature of the battery to the cooling target temperature.

In a third aspect, an embodiment of the present application provides an electronic device, including:

a memory for storing a computer program;

a processor for executing a computer program stored in a memory, and when the computer program is executed, implementing the method of any embodiment of the vehicle battery cooling method of the first aspect of the present application.

In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as in any of the embodiments of the vehicle battery cooling method of the first aspect described above.

In a fifth aspect, embodiments of the present application provide a computer program comprising computer readable code which, when run on a device, causes a processor in the device to implement a method as in any of the embodiments of the vehicle battery cooling method of the first aspect described above.

According to the vehicle battery cooling method, device, electronic equipment and storage medium, the current environment temperature, load information and vehicle speed of the vehicle are determined, the battery cooling trigger temperature and the battery cooling target temperature are determined based on the environment temperature, the predicted heating value of the battery is determined based on the vehicle speed, the load information and the environment temperature, when the predicted heating value accords with the battery cooling condition, the target refrigerating power of an air conditioner on the vehicle is determined based on the predicted heating value, when the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle, the temperature of the battery is adjusted to the cooling target temperature, the heat value of the battery is predicted according to the current state of the vehicle, the refrigerating power of the air conditioner is adjusted in real time according to the predicted heating value, the refrigerating power is adapted to the environment temperature of the vehicle when the vehicle runs, the speed of the vehicle, the load and other states, and compared with the scheme of fixed refrigerating power and the fixed cooling trigger temperature, the embodiment of the application can adaptively adjust the cooling trigger temperature, the cooling target temperature and the air conditioning refrigerating power, so that the battery is cooled with lower refrigerating power in the running mileage of the vehicle, consumption of battery energy is reduced, and the running mileage of the electric vehicle is facilitated to be improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic flow chart of a cooling method for a vehicle battery according to an embodiment of the present application;

FIG. 2 is a flow chart of another method for cooling a vehicle battery according to an embodiment of the present application;

FIG. 3 is a flow chart of yet another method for cooling a vehicle battery according to an embodiment of the present application;

FIG. 4 is a flow chart of yet another method for cooling a vehicle battery according to an embodiment of the present application;

FIG. 5 is a flow chart of yet another method for cooling a vehicle battery according to an embodiment of the present application;

FIG. 6 is a flow chart of yet another method for cooling a vehicle battery according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a cooling device for a vehicle battery according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings, it being apparent that the described embodiments are some, but not all embodiments of the present application. It should be noted that: the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.

It will be appreciated by those skilled in the art that terms such as "first," "second," and the like in the embodiments of the present application are used merely to distinguish between different steps, devices, or modules, and do not represent any particular technical meaning or logical sequence therebetween.

It should also be understood that in this embodiment, "plurality" may refer to two or more, and "at least one" may refer to one, two or more.

It should also be appreciated that any component, data, or structure referred to in the embodiments of the present application may be generally understood as one or more without explicit limitation or the contrary in the context.

In addition, the term "and/or" in this application is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

It should also be understood that the description of the embodiments herein emphasizes the differences between the embodiments, and that the same or similar features may be referred to each other, and for brevity, will not be described in detail.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. For an understanding of the embodiments of the present application, the present application will be described in detail below with reference to the drawings in conjunction with the embodiments. It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to solve the technical problem of high energy consumption for cooling a power battery in the prior art, the application provides a vehicle battery cooling method, which can adjust the refrigeration power of an air conditioner in a vehicle in real time to cool the battery and reduce the energy consumption of the battery.

Fig. 1 is a schematic flow chart of a cooling method for a vehicle battery according to an embodiment of the present application. The method may be applied to one or more electronic devices of a vehicle (e.g., a smart drive vehicle), a smart phone, a notebook computer, a desktop computer, a portable computer, a server, etc. For example, when the present method is applied to a vehicle, the method may be performed by a controller (e.g., PCU (power control unit, power Control Unit), BMS (battery management system ), etc.) on the vehicle; when the method is applied to a server or other electronic equipment, the electronic equipment can be in communication connection with a vehicle so as to control the running of the vehicle and control equipment such as an air conditioner on the vehicle.

The main execution body of the method may be hardware or software. When the execution body is hardware, the execution body may be one or more of the electronic devices. For example, a single electronic device may perform the method, or a plurality of electronic devices may cooperate with one another to perform the method. When the execution subject is software, the method may be implemented as a plurality of software or software modules, or may be implemented as a single software or software module. The present invention is not particularly limited herein.

As shown in fig. 1, the method specifically includes:

and 101, determining the current corresponding environment temperature, load information and vehicle speed of the vehicle.

In this embodiment, the ambient temperature may be acquired by a temperature sensor on the vehicle, or may be acquired remotely via the internet. For example, the weather conditions for a location of a vehicle may be obtained from that location to obtain the ambient temperature.

The load information includes, but is not limited to, empty weight, weight of load such as person and goods on the vehicle, wind resistance data of the vehicle, friction data of tires, and the like, and various kinds of information which can be used for representing the influence on the running speed of the vehicle can be used as the load information.

The vehicle speed may be a speed of the vehicle to be driven in a future period or a path calculated according to the navigation information, or may be a current driving speed of the vehicle, or may be an average speed of the path that has been driven, or the like.

Step 102, determining a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature.

In this embodiment, the ambient temperature affects the heat dissipation performance of the battery, and therefore, the battery cooling trigger temperature is related to the ambient temperature. Generally, the higher the ambient temperature is, the worse the heat dissipation performance of the battery is, and a lower battery cooling trigger temperature needs to be set, namely, the cooling operation of the battery is triggered when the battery temperature is lower; the lower the ambient temperature is, the better the heat dissipation performance of the battery is, and the higher the battery cooling trigger temperature can be set, namely, the operation of cooling the battery is triggered again when the battery temperature is higher.

The corresponding relation between the ambient temperature and the battery cooling trigger temperature can be realized by various modes such as a table, a calculation formula and the like, and the rule of determining the battery cooling trigger temperature according to the ambient temperature can be satisfied. Typically, the battery cooling target temperature is set to be lower than the battery cooling trigger temperature by a certain temperature, for example, battery cooling target temperature=battery cooling trigger temperature-3 ℃.

Step 103, determining the predicted heating value of the battery based on the vehicle speed, the load information and the ambient temperature.

In the present embodiment, the predicted heat generation amount of the battery is related to the vehicle speed, the load information, and the ambient temperature. Specifically, the faster the vehicle speed, the higher the predicted heat generation amount; the larger the force which needs to be overcome when the vehicle runs and indicated by the load information is, the larger the predicted heating value is; the higher the ambient temperature, the worse the heat dissipation performance of the battery, and the higher the predicted heat generation amount. Based on the above rules, the correspondence between the vehicle speed, the load information, and the ambient temperature and the predicted heating value may be set, and the correspondence may be preset, for example, may be implemented by a preset formula, a table, or the like.

As an example, the vehicle speed, the load information, the ambient temperature, and the heat generation amount of the battery may be counted in advance to generate a correspondence table, and the electronic device may find the heat generation amount corresponding to the vehicle speed, the load information, and the ambient temperature from the correspondence table as the predicted heat generation amount. Or the load information, the environmental temperature and the heat productivity of the battery which are counted in advance can be fitted to obtain a calculation formula, and the predicted heat productivity is calculated by using the formula.

Step 104, determining whether the predicted heating value meets the battery cooling condition.

In the present embodiment, the battery cooling condition indicates a condition in which the battery needs to be cooled. As an example, a heat generation amount threshold may be set, and if the predicted heat generation amount is equal to or greater than the heat generation amount threshold, it is determined that the battery cooling condition is satisfied. Alternatively, the battery temperature may be calculated from the predicted amount of heat generation, and if the temperature is equal to or greater than the temperature threshold, it may be determined that the battery cooling condition is met.

Step 105, if the battery cooling condition is met, determining the target cooling power of the air conditioner on the vehicle based on the predicted heating value.

In this embodiment, the electronic device may determine the target cooling power of the air conditioner according to a preset correspondence between the heating value and the cooling power. The correspondence may be realized in the form of a table, a calculation formula, or the like, which is established in advance.

For example, a table containing a large amount of heat generation amount and cooling power may be established in advance, and the electronic apparatus may find the cooling power corresponding to the predicted heat generation amount from the table as the target cooling power.

And step 106, in response to the fact that the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle, controlling the air conditioner to operate according to the target refrigeration power so as to adjust the actual temperature of the battery to the cooling target temperature.

In this embodiment, the actual temperature of the battery may be acquired by a temperature sensor provided on the battery. Generally, a BMS on a vehicle may acquire an actual temperature of a battery in real time and transmit the actual temperature to an electronic device (e.g., PCU) performing the method. And when the electronic equipment determines that the actual temperature is greater than or equal to the battery cooling trigger temperature, a control instruction is sent to an air conditioner on the vehicle so as to control the air conditioner to operate according to the target refrigeration power. And when the actual temperature of the battery is less than or equal to the cooling target temperature, controlling the air conditioner to stop cooling the battery.

It should be noted that this embodiment may be performed in real time during running of the vehicle. For example, the method can be set and executed once per cycle, or the driving distance can be divided into a plurality of road sections, and each road section executes the method once, so that the predicted heating value is calculated in real time according to the current environment temperature, load information and vehicle speed of the vehicle, and the target refrigerating power of the air conditioner is set in advance, so that the actual temperature of the battery is adjusted adaptively.

According to the vehicle battery cooling method, the current environment temperature, load information and the vehicle speed of the vehicle are determined, the battery cooling trigger temperature and the battery cooling target temperature are determined based on the environment temperature, the predicted heating value of the battery is determined based on the vehicle speed, the load information and the environment temperature, and the target refrigerating power of an air conditioner on the vehicle is determined based on the predicted heating value when the predicted heating value accords with the battery cooling condition.

In some alternative implementations of the present embodiment, as shown in fig. 2, step 103 includes:

step 1031, determining a discharge power of the battery based on the vehicle speed, the load information, and the ambient temperature.

Specifically, the discharge power of the battery is related to the vehicle speed, load information, and the ambient temperature. The faster the vehicle speed, the higher the discharge power; the larger the force which needs to be overcome when the vehicle runs and the larger the discharge power is, which are indicated by the load information; the higher the ambient temperature, the worse the heat dissipation performance of the battery and the higher the discharge power. Based on the above rules, the correspondence between the vehicle speed, the load information, and the environmental temperature and the discharge power may be set, and the correspondence may be preset, for example, may be implemented by a preset formula, a table, or the like.

Optionally, according to the physical quantities such as the vehicle speed, the load information, the ambient temperature and the like, the battery driving power required for driving the vehicle to run can be calculated or found, and the proportionality coefficient between the battery driving power and the battery discharging power can be obtained through calibration in advance. For example, the battery drive power is divided by a scaling factor (e.g., 96%) to obtain the discharge power.

Step 1032, based on the discharge power, determines a predicted heating value of the battery.

Wherein, the corresponding relation between the discharge power and the predicted heating value is expressed by a formula, a table and the like. For example, the amount of heat generated by the battery corresponding to each of the plurality of types of discharge power may be counted in advance, and a formula indicating the relationship between the discharge power and the amount of heat may be obtained by fitting data, and the predicted amount of heat may be calculated using the formula. Alternatively, a table including a plurality of kinds of discharge powers and corresponding heat amounts may be provided, and the heat amount corresponding to the discharge power may be found from the table as the predicted heat amount.

According to the embodiment, the corresponding discharging power is determined by collecting the vehicle speed, the load information and the environment temperature, the predicted heating value is determined according to the discharging power, and the power consumption condition of the battery is accurately calculated based on objective physical quantity in the running process of the vehicle, so that the accuracy of determining the predicted heating value is improved.

In some alternative implementations of the present embodiment, as shown in fig. 3, step 1032 includes:

step 10321, determining the current remaining power of the battery.

Typically, the remaining charge may be expressed by a percentage, i.e., SOC (State of Charge) of the battery, 100% full charge, and 0% empty charge.

Step 10322, searching the predicted heating value corresponding to the discharge power and the residual electric quantity from the first corresponding relation table established in advance.

The first correspondence table includes a remaining power, a discharge power, and a heating value, where the heating value in the table may be measured in advance.

As an example, the following table shows the form of the first correspondence table:

where kJ11, kJ12, etc. represent the amount of heat generation.

Because the residual electric quantity of the battery changes in real time in the running process of the vehicle, the embodiment can accurately predict the heating value of the battery according to the residual electric quantity of the battery in real time by setting the first corresponding relation table containing the residual electric quantity, thereby being beneficial to timely adjusting the refrigerating power of an air conditioner in the running process of the vehicle and reducing the electric quantity consumed for cooling the battery.

In some alternative implementations of the present embodiment, step 105 may be performed as follows:

and searching target refrigeration power of the air conditioner corresponding to the predicted heating value and the residual electric quantity from a second pre-established corresponding relation table.

Wherein the target cooling power is the minimum power at which the air conditioner adjusts the temperature of the battery to the cooling target temperature.

Specifically, the second correspondence table includes a remaining power, a heating value, and a cooling power, where the heating value and the cooling power corresponding to the remaining power in the table may be measured in advance and determined, and the cooling power in the table is a minimum power that enables the temperature of the battery to be adjusted to a cooling target temperature under the condition of the corresponding remaining power and heating value.

As an example, the following table shows the form of this second correspondence table:

where kW11, kW12, etc. represent the cooling power of the battery.

According to the embodiment, the second corresponding relation table is set, and the air conditioner refrigerating power corresponding to the predicted heating value and the residual electric quantity is searched from the second relation table, so that the battery is cooled with the minimum refrigerating power in real time according to the residual electric quantity of the battery, and the electric quantity consumed by the air conditioner is reduced on the premise of effectively refrigerating the battery.

In some alternative implementations of the present embodiment, as shown in fig. 4, step 104 includes:

in step 1041, heat dissipation attribute information of the battery is obtained.

The heat dissipation attribute information indicates how fast the battery dissipates heat when the battery dissipates heat naturally. As an example, the heat dissipation attribute information includes, but is not limited to, at least one of: heat transfer coefficient of battery surface material, battery heat dissipation surface area, etc.

Step 1042, determining a predicted temperature of the battery based on the predicted heating value, the ambient temperature, and the heat dissipation property information.

Specifically, the predicted temperature of the battery may be determined according to a preset formula, a correspondence table, or the like.

For example, the formula may be: predicted heat generation amount=heat transfer coefficient of battery surface material×heat dissipation surface area of battery× (predicted temperature-ambient temperature), and in this case, since other parameters are known in addition to the predicted temperature, the predicted temperature of the battery can be calculated.

Step 1043, if the predicted temperature is greater than or equal to the battery cooling trigger temperature, determining that the predicted heating value meets the battery cooling condition.

According to the embodiment, the predicted temperature of the battery is determined according to the heat radiation attribute information, the predicted temperature is compared with the cooling trigger temperature, and a data reference is provided for the operation of the air conditioner on cooling the battery, so that whether the predicted heating value accords with the cooling condition of the battery is judged rapidly and accurately, the refrigerating power of the air conditioner is adjusted in time, and the energy consumption of the battery is reduced.

In some optional implementations of the present embodiment, after step 106, the method further includes:

and controlling the air conditioner to operate according to the preset refrigeration power so as to adjust the actual temperature of the battery to the cooling target temperature in response to the fact that the actual temperature of the battery is larger than the battery cooling trigger temperature and the difference value between the actual temperature and the battery cooling trigger temperature is larger than or equal to the preset temperature difference threshold.

Wherein the preset temperature difference threshold represents an upper limit that allows the actual temperature of the battery to deviate from the cooling trigger temperature, the preset cooling power may be a larger power, for example, may be a maximum power. In the actual driving scenario of the vehicle, the driving power of the battery is increased due to the road condition, the environment and other factors, so that the actual temperature of the battery is too high, that is, the deviation degree from the cooling trigger temperature is large, and the target cooling power determined by the step 106 is insufficient to cool the battery to the cooling target temperature. Therefore, the refrigerating power of the air conditioner can be increased to the preset refrigerating power, so that the actual temperature of the battery is quickly adjusted to the cooling target temperature, and the battery is ensured to be in a normal working state.

According to the embodiment, the preset temperature difference threshold value and the preset refrigerating power are set, so that the actual temperature of the battery deviates from the battery cooling trigger temperature to be larger, the refrigerating power of the air conditioner is timely increased, the actual temperature of the battery is quickly restored to the cooling target temperature, and the battery temperature is ensured to be normal on the basis of reducing the electric energy consumed for cooling the battery, so that the stability of vehicle running is improved.

In some alternative implementations of the present embodiment, as shown in fig. 5, after step 104, the method further includes:

step 105, if the predicted heating value does not meet the battery cooling condition, determining a target heating value of the battery corresponding to the battery cooling trigger temperature.

Specifically, if the predicted heat generation amount does not meet the battery cooling condition, the air conditioner does not need to be started to cool the battery, and at this time, the vehicle speed can be appropriately increased under the condition that the air conditioner does not start to cool the battery.

The correspondence between the heat generation amount of the battery and the temperature of the battery may be set in advance by means of a formula, a table, or the like. For example, the heat generation amount corresponding to the battery cooling trigger temperature may be calculated as the target heat generation amount using the relationship of the heat radiation attribute information, the battery temperature, and the heat generation amount described in the above-described embodiment corresponding to fig. 4.

And 106, determining a first target vehicle speed of the vehicle based on the target heating value, the load information and the environmental temperature, and adjusting the vehicle speed of the vehicle to the first target vehicle speed.

The first target vehicle speed, i.e., the air conditioner, does not start the battery cooling function, and is in a preset speed range, and the vehicle can reach a higher vehicle speed (such as a highest vehicle speed under the condition) under the driving of the battery. The way of adjusting the speed of the vehicle may be performed automatically by the electronic device, i.e. the method is applied in an automatic driving scenario.

The correspondence between the heat generation amount, the load information, and the ambient temperature may be set in advance by means of a formula, a table, or the like. For example, the method described in the corresponding embodiment of fig. 2 may be adopted, in which the discharge power of the battery is reversely deduced according to the target heating value, and then the vehicle speed is reversely deduced as the first target vehicle speed in combination with the load information and the ambient temperature.

According to the embodiment, when the predicted heating value does not meet the battery cooling condition, the vehicle runs according to the first target vehicle speed, and the function of the air conditioner for cooling the battery is not triggered, so that the running process of the vehicle is more suitable for an actual scene, the running time can be shortened, and the power consumption for starting the air conditioner can be saved.

In some alternative implementations of the present embodiment, as shown in fig. 6, after step 104, the method further includes:

and 107, if the predicted heating value meets the battery cooling condition, determining the lowest allowable vehicle speed of the vehicle based on the preset travel information.

The trip information may be acquired from a navigation device on the vehicle, and the trip information may include information such as a navigation route, a planned travel time, a vehicle speed range, etc., from which the minimum allowable vehicle speed may be calculated, and travel at the minimum allowable vehicle speed may be ensured to reach the destination before the allowable latest time point.

And step 108, if the current speed of the vehicle is greater than the minimum allowable speed, determining a second target speed of the vehicle based on the minimum allowable speed, and adjusting the speed of the vehicle to the second target speed.

Alternatively, the minimum allowable vehicle speed may be determined as the second target vehicle speed, so that the heating value of the battery is reduced by reducing the vehicle speed, and the cooling power of the air conditioner is automatically reduced. Alternatively, according to the method described in the above embodiment, the vehicle speed when the battery temperature reaches the cooling trigger temperature may be determined as the reference vehicle speed, and if the reference vehicle speed is greater than or equal to the minimum allowable vehicle speed, any vehicle speed less than the reference vehicle speed may be determined as the second target vehicle speed, so that the actual temperature of the battery is kept less than the battery cooling trigger temperature, and the frequency of cooling the battery by the air conditioner is reduced.

According to the embodiment, under the condition that the predicted heating value accords with the battery cooling condition, the cooling power of the air conditioner is reduced by reducing the vehicle speed, or the cooling function of the air conditioner on the battery is automatically turned off, so that the electric energy consumed by the air conditioner on the battery cooling in the running process of the vehicle is further reduced.

Fig. 7 is a schematic structural diagram of a cooling device for a vehicle battery according to an embodiment of the present application. The method specifically comprises the following steps:

a first determining module 701, configured to determine an ambient temperature, load information, and a vehicle speed currently corresponding to the vehicle;

a second determination module 702 for determining a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature;

a third determining module 703 for determining a predicted heating value of the battery based on the vehicle speed, the load information, and the ambient temperature;

a fourth determination module 704 for determining whether the predicted heating value meets a battery cooling condition;

a fifth determining module 705 for determining a target cooling power of an air conditioner on the vehicle based on the predicted heating value if the battery cooling condition is met;

the first control module 706 is configured to control the air conditioner to operate according to the target cooling power in response to the actual temperature of the battery being greater than or equal to the battery cooling trigger temperature during running of the vehicle, so as to adjust the actual temperature of the battery to the cooling target temperature.

In one possible embodiment, the third determining module includes: a first determination unit configured to determine a discharge power of the battery based on the vehicle speed, the load information, and the ambient temperature; and a second determination unit configured to determine a predicted heat generation amount of the battery based on the discharge power.

In one possible embodiment, the second determining unit includes: a first determination subunit, configured to determine a current remaining power of the battery; and the searching subunit is used for searching the predicted heating value corresponding to the discharge power and the residual electric quantity from a first corresponding relation table which is established in advance.

In one possible embodiment, the fifth determining module is further configured to: and searching target refrigerating power of the air conditioner corresponding to the predicted heating value and the residual electric quantity from a second pre-established corresponding relation table, wherein the target refrigerating power is the minimum power of the air conditioner for adjusting the temperature of the battery to the cooling target temperature.

In one possible implementation, the fourth determining module includes: the device comprises an acquisition unit, a storage unit and a control unit, wherein the acquisition unit is used for acquiring heat radiation attribute information of the battery, wherein the heat radiation attribute information represents the heat radiation speed degree of the battery under the condition of natural heat radiation; a third determination unit configured to determine a predicted temperature of the battery based on the predicted heat generation amount, the ambient temperature, and the heat radiation attribute information; and the fourth determining unit is used for determining that the predicted heating value accords with the battery cooling condition if the predicted temperature is greater than or equal to the battery cooling trigger temperature.

In one possible embodiment, the apparatus further comprises: and the second control module is used for responding to the fact that the actual temperature of the battery is larger than the battery cooling trigger temperature, and the difference value between the actual temperature and the battery cooling trigger temperature is larger than or equal to a preset temperature difference threshold value, and controlling the air conditioner to operate according to preset refrigeration power so as to adjust the actual temperature of the battery to the cooling target temperature.

In one possible embodiment, the apparatus further comprises: a sixth determining module, configured to determine a target heating value of the battery corresponding to the battery cooling trigger temperature if the predicted heating value does not meet the battery cooling condition; the first adjusting module is used for determining a first target vehicle speed of the vehicle based on the target heating value, the load information and the environment temperature, and adjusting the vehicle speed of the vehicle to the first target vehicle speed.

In one possible embodiment, the apparatus further comprises: a seventh determining module, configured to determine a minimum allowable vehicle speed of the vehicle based on preset trip information if the predicted heating value meets the battery cooling condition; and the second adjusting module is used for determining a second target speed of the vehicle based on the minimum allowable speed if the current speed of the vehicle is greater than the minimum allowable speed and adjusting the speed of the vehicle to the second target speed.

The vehicle battery cooling device provided in this embodiment may be a vehicle battery cooling device as shown in fig. 4, and may perform all the steps of the above vehicle battery cooling method, so as to achieve the technical effects of the above vehicle battery cooling method, and specific reference is made to the above related description, which is omitted herein for brevity.

Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application, and the electronic device 800 shown in fig. 8 includes: at least one processor 801, memory 802, at least one network interface 804, and other user interfaces 803. The various components in the electronic device 800 are coupled together by a bus system 805. It is appreciated that the bus system 805 is used to enable connected communications between these components. The bus system 805 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration, the various buses are labeled as bus system 805 in fig. 8.

The user interface 803 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, a trackball, a touch pad, or a touch screen, etc.).

It is appreciated that the memory 802 in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct memory bus RAM (DRRAM). The memory 802 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some implementations, the memory 802 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 8021 and application programs 8022.

The operating system 8021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 8022 includes various application programs such as a Media Player (Media Player), a Browser (Browser), and the like for realizing various application services. A program for implementing the method of the embodiment of the present application may be included in the application program 8022.

In this embodiment, by calling a program or an instruction stored in the memory 802, specifically, a program or an instruction stored in the application 8022, the processor 801 is configured to perform the method steps provided by the method embodiments, for example, including:

determining the current corresponding environment temperature, load information and vehicle speed of the vehicle; determining a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature; determining a predicted heating value of the battery based on the vehicle speed, the load information and the ambient temperature; determining whether the predicted heating value meets a battery cooling condition; if the battery cooling condition is met, determining the target refrigerating power of an air conditioner on the vehicle based on the predicted heating value; and controlling the air conditioner to operate according to the target refrigeration power in response to the fact that the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle so as to adjust the actual temperature of the battery to the cooling target temperature.

The method disclosed in the embodiments of the present application may be applied to the processor 801 or implemented by the processor 801. The processor 801 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware in the processor 801 or by instructions in software. The processor 801 described above may be a general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software elements in a decoded processor. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 802, and the processor 801 reads information in the memory 802 and, in combination with its hardware, performs the steps of the above method.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (dspev, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units configured to perform the above-described functions of the application, or a combination thereof.

For a software implementation, the techniques described herein may be implemented by means of units that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The electronic device provided in this embodiment may be an electronic device as shown in fig. 8, and may perform all the steps of the above-described cooling method for each vehicle battery, so as to achieve the technical effects of the above-described cooling method for each vehicle battery, and specific reference should be made to the above-described related description, which is omitted herein for brevity.

The embodiment of the application also provides a storage medium (computer readable storage medium). The storage medium here stores one or more programs. Wherein the storage medium may comprise volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid state disk; the memory may also comprise a combination of the above types of memories.

When one or more programs in the storage medium are executable by one or more processors, the above-described vehicle battery cooling method performed on the electronic device side is implemented.

The above-mentioned processor is configured to execute a program stored in the memory to implement the following steps of the vehicle battery cooling method executed on the electronic device side:

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of function in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of cooling a vehicle battery, the method comprising:

determining the current corresponding environment temperature, load information and vehicle speed of the vehicle;

determining a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature;

determining a predicted heating value of the battery based on the vehicle speed, the load information, and the ambient temperature;

determining whether the predicted heating value meets a battery cooling condition;

if the battery cooling condition is met, determining a target refrigeration power of an air conditioner on the vehicle based on the predicted heating value;

and controlling the air conditioner to operate according to the target refrigeration power in response to the fact that the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle, so as to adjust the actual temperature of the battery to the cooling target temperature.

2. The method of claim 1, wherein the determining the predicted heating value of the battery based on the vehicle speed, the load information, and the ambient temperature comprises:

determining a discharge power of the battery based on the vehicle speed, the load information, and the ambient temperature;

based on the discharge power, a predicted heating value of the battery is determined.

3. The method of claim 2, wherein the determining the predicted heating value of the battery based on the discharge power comprises:

determining the current residual capacity of the battery;

and searching the predicted heating value corresponding to the discharge power and the residual electric quantity from a first pre-established corresponding relation table.

4. The method of claim 3, wherein the determining a target cooling power of an air conditioner on the vehicle based on the predicted heating value comprises:

and searching target refrigeration power of the air conditioner corresponding to the predicted heating value and the residual electric quantity from a second pre-established corresponding relation table, wherein the target refrigeration power is the minimum power of the air conditioner for adjusting the temperature of the battery to the cooling target temperature.

5. The method of claim 1, wherein the determining whether the predicted heating value meets a battery cooling condition comprises:

acquiring heat radiation attribute information of the battery, wherein the heat radiation attribute information represents the heat radiation speed degree of the battery under the condition of natural heat radiation;

determining a predicted temperature of the battery based on the predicted heating value, the ambient temperature, and the heat radiation attribute information;

and if the predicted temperature is greater than or equal to the battery cooling trigger temperature, determining that the predicted heating value accords with the battery cooling condition.

6. The method of claim 1, wherein after said controlling said air conditioner to operate at said target cooling power, said method further comprises:

and controlling the air conditioner to operate according to preset refrigeration power so as to adjust the actual temperature of the battery to the cooling target temperature in response to the fact that the actual temperature of the battery is larger than the battery cooling trigger temperature and the difference value between the actual temperature and the battery cooling trigger temperature is larger than or equal to a preset temperature difference threshold.

7. The method of any one of claims 1-6, wherein after said determining whether the predicted heating value meets a battery cooling condition, the method further comprises:

If the predicted heating value does not accord with the battery cooling condition, determining a target heating value of the battery corresponding to the battery cooling trigger temperature;

and determining a first target vehicle speed of the vehicle based on the target heating value, the load information and the environmental temperature, and adjusting the vehicle speed of the vehicle to the first target vehicle speed.

8. The method of any one of claims 1-6, wherein after said determining whether the predicted heating value meets a battery cooling condition, the method further comprises:

if the predicted heating value accords with the battery cooling condition, determining the lowest allowable vehicle speed of the vehicle based on preset travel information;

and if the current speed of the vehicle is greater than the minimum allowable speed, determining a second target speed of the vehicle based on the minimum allowable speed, and adjusting the speed of the vehicle to the second target speed.

9. A vehicle battery cooling apparatus, characterized in that the apparatus comprises:

the first determining module is used for determining the current corresponding environment temperature, load information and vehicle speed of the vehicle;

a second determining module configured to determine a battery cooling trigger temperature and a battery cooling target temperature based on the ambient temperature;

A third determination module configured to determine a predicted heating value of the battery based on the vehicle speed, the load information, and the ambient temperature;

a fourth determination module configured to determine whether the predicted heating value meets a battery cooling condition;

a fifth determining module configured to determine a target cooling power of an air conditioner on the vehicle based on the predicted heating value if the battery cooling condition is met;

and the first control module is used for controlling the air conditioner to run according to the target refrigeration power so as to adjust the actual temperature of the battery to the cooling target temperature in response to the fact that the actual temperature of the battery is greater than or equal to the battery cooling trigger temperature in the running process of the vehicle.

10. An electronic device, comprising:

a memory for storing a computer program;

a processor for executing a computer program stored in said memory, and said computer program, when executed, implementing the vehicle battery cooling method of any one of the preceding claims 1-8.

11. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the vehicle battery cooling method according to any one of the preceding claims 1-8.