CN114927803A - Battery temperature adjusting method and device, storage medium and vehicle - Google Patents

Abstract

The invention discloses a battery temperature adjustment method, device, storage medium and vehicle. The method includes: acquiring state data of the battery in the vehicle at the current moment, wherein the state data is used to represent the state of the battery during the charging and discharging process at the current moment; determining the target heat exchange power of the battery based on the state data; Thermal power, adjust the actual heat exchange power of the battery; use the actual heat exchange power to adjust the temperature of the battery during the charging and discharging process after the current moment. The present invention solves the technical problem of low efficiency in controlling the battery temperature of the vehicle.

Description

Battery temperature adjustment method, device, storage medium and vehicle

technical field

The present invention relates to the field of vehicles, and in particular, to a method, device, storage medium and vehicle for adjusting battery temperature.

Background technique

At present, the battery is used as the energy source of the vehicle, and the control of the battery thermal management is usually based on the battery temperature as the main control input source. However, the temperature sensors of the cells in the battery are all arranged on the outer surface of the cells, and the heat transfer takes time, and Taking the battery temperature as the main control input source needs to reserve more threshold margin to ensure that the battery temperature is controlled in a suitable range. Therefore, the above scheme has a hysteresis and will lead to an increase in energy consumption, further aggravating the anxiety of driving range, and thus There is a technical problem of inefficiency in controlling the temperature of the battery of the vehicle.

For the problem of low efficiency in controlling the temperature of the battery of the vehicle in the above-mentioned prior art, no effective solution has been proposed so far.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a battery temperature adjustment method, device, storage medium, and vehicle, so as to at least solve the technical problem of low efficiency in controlling the battery temperature of the vehicle.

According to an aspect of the embodiments of the present invention, a method for adjusting the temperature of a battery is provided. The method includes: acquiring state data of a battery in the vehicle at the current moment, wherein the state data is used to represent the state of the battery in the process of charging and discharging at the current moment; determining the target heat exchange power of the battery based on the state data; and based on the target heat exchange power , adjust the actual heat exchange power of the battery; use the actual heat exchange power to adjust the temperature of the battery during the charging and discharging process after the current moment.

Optionally, based on the state data, determining the target heat exchange power of the battery includes: determining the heat generation power of the battery based on the battery temperature in the state data and the battery current in the state data; based on the battery temperature and the ambient temperature where the battery is located and the temperature of the heat exchange medium in the vehicle to determine the target coefficient, where the target coefficient is used to characterize the degree of influence of the ambient temperature and the temperature of the heat exchange medium on the heat exchange power of the battery; based on the target coefficient and heat production power, determine the target heat exchange power .

Optionally, determining the target coefficient based on the battery temperature, the ambient temperature and the heat exchange medium temperature includes: determining a first coefficient based on the battery temperature and the ambient temperature, where the first coefficient is used to characterize the heat exchange power of the battery from the ambient temperature The degree of influence; the second coefficient is determined based on the ambient temperature and the temperature of the heat exchange medium, wherein the second coefficient is used to characterize the degree of influence of the temperature of the heat exchange medium on the heat exchange power of the battery; the first coefficient and the second coefficient are two The ratio between them is determined as the target coefficient.

Optionally, determining the target heat exchange power of the battery based on the target coefficient and the heat generation power includes: determining a product between the target coefficient and the heat generation power as the target heat exchange power.

Optionally, determining the first coefficient based on the battery temperature and the ambient temperature, including one of the following: determining the first coefficient in response to the battery temperature being not less than the temperature threshold and the battery temperature being greater than the ambient temperature; determining the first coefficient in response to the battery temperature being not less than the temperature threshold , and the battery temperature is equal to the ambient temperature, the first coefficient is determined; the first coefficient is determined in response to the battery temperature not being less than the temperature threshold and the battery temperature being less than the ambient temperature.

Optionally, determining the second coefficient based on the ambient temperature and the temperature of the heat exchange medium, including one of the following: determining the second coefficient in response to the temperature of the heat exchange medium being greater than the ambient temperature; determining the first coefficient in response to the temperature of the heat exchange medium being equal to the ambient temperature. A second coefficient; the second coefficient is determined in response to the heat exchange medium temperature being less than the ambient temperature.

Optionally, based on the target heat exchange power, adjusting the actual heat exchange power of the battery includes: based on the heat exchange medium flow or heat exchange medium temperature corresponding to the target heat exchange power in the database, adjusting the heat exchange medium flow in the vehicle or the heat exchange medium in the vehicle. The temperature of the heat medium is adjusted; based on the adjusted flow rate of the heat exchange medium in the vehicle or the temperature of the heat exchange medium in the vehicle, the actual heat exchange power of the battery is adjusted.

According to another aspect of the embodiments of the present invention, a device for adjusting the temperature of a battery is also provided. The device includes: an acquiring unit for acquiring state data of the battery in the vehicle at the current moment, wherein the state data is used to represent the state of the battery in the process of charging and discharging at the current moment; a determining unit is used for determining the state of the battery based on the state data The target heat exchange power; the first adjustment unit is used to adjust the actual heat exchange power of the battery based on the target heat exchange power; the second adjustment unit is used to use the actual heat exchange power to adjust the battery during the charging and discharging process after the current moment. temperature.

According to another aspect of the embodiments of the present invention, a computer-readable storage medium is also provided. The computer-readable storage medium includes a stored program, wherein when the program runs, the device where the computer-readable storage medium is located is controlled to execute the method for adjusting the battery temperature of the embodiment of the present invention.

According to another aspect of the embodiments of the present invention, a processor is also provided. The processor is used for running a program, wherein the method for adjusting the battery temperature of the embodiment of the present invention is executed when the program is running.

According to another aspect of the embodiments of the present invention, a vehicle is also provided. The vehicle is used to implement the battery temperature adjustment method of the embodiment of the present invention.

In the embodiment of the present invention, the state data of the battery in the vehicle at the current moment is obtained, wherein the state data is used to represent the state of the battery during the charging and discharging process at the current moment; based on the state data, the target heat exchange power of the battery is determined; The heat exchange power is used to adjust the actual heat exchange power of the battery; the actual heat exchange power is used to adjust the temperature of the battery during the charging and discharging process after the current moment. That is to say, the embodiment of the present invention determines the target heat exchange power of the battery by acquiring the state of the battery in the current charging and discharging process in real time, so as to adjust the actual heat exchange power of the battery, and uses the actual heat exchange power to adjust the current charging and discharging power of the battery in real time. The temperature in the process achieves the technical effect of improving the efficiency of controlling the temperature of the battery of the vehicle, and solves the technical problem of low efficiency of controlling the temperature of the battery of the vehicle.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a flowchart of a method for adjusting battery temperature according to an embodiment of the present invention;

2 is a flowchart of another method for adjusting battery temperature according to an embodiment of the present invention;

3 is a schematic diagram of a calibration result of a battery thermal management system according to an embodiment of the present invention;

4 is a schematic diagram of a device of a battery thermal management system according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an apparatus for adjusting the temperature of a battery according to an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Example 1

According to an embodiment of the present invention, an embodiment of a method for adjusting battery temperature is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and , although a logical order is shown in the flowcharts, in some cases steps shown or described may be performed in an order different from that herein.

FIG. 1 is a flowchart of a method for adjusting battery temperature according to an embodiment of the present invention. As shown in FIG. 1 , the method for adjusting battery temperature includes the following steps:

In step S102, state data of the battery in the vehicle at the current moment is acquired, wherein the state data is used to represent the state of the battery during the charging and discharging process at the current moment.

In the technical solution provided by the above step S102 of the present invention, the data used to characterize the state of the battery during the charging and discharging process at the current moment in the vehicle is obtained, and the state data may include but not limited to the real-time current of the battery, the temperature of the battery, and the state of charge of the battery. (State Of Charge, referred to as SOC), battery performance state (State Of Health, referred to as SOH), etc., where the real-time current of the battery can be represented by I, and the battery temperature can be represented by T _bat .

Optionally, in this embodiment, the temperature of the battery can be obtained through a temperature sensor; the real-time current of the battery can be obtained through a current sensor; the current state of charge of the battery, the battery performance state, etc. .

For example, the state of charge of the battery can also be called the remaining battery power, which can be used to represent the ratio of the remaining power of the battery after a period of use or a long period of unused use to the power in the fully charged state, usually expressed as a percentage, and its value The range can be from 0 to 1. When the battery state of charge is 0, it is used to indicate that the battery is fully discharged; when the battery state of charge is 1, it is used to indicate that the battery is fully charged; the battery performance state can also be referred to as battery capacity, battery The health degree can be used to indicate the ratio of the performance parameters to the nominal parameters after the battery has been used for a period of time. It is usually expressed as a percentage. For example, a new factory battery is 100%, and a completely scrapped battery is 0%. The battery performance state can be the battery from a fully charged state The ratio of the capacity released at a certain rate to the cut-off voltage and its corresponding nominal capacity can also be the limit capacity of the battery.

Step S104, based on the state data, determine the target heat exchange power of the battery.

In the technical solution provided in the above step S104 of the present invention, the state data of the battery at the current moment is obtained, and after the state data of the battery is determined, the target heat exchange power of the battery can be determined based on the obtained state data, and the target heat exchange power can be The target value used to characterize the heat exchange power to be achieved by the battery can be expressed by Q _-exchange .

Step S106, based on the target heat exchange power, adjust the actual heat exchange power of the battery.

In the technical solution of the above step S106 of the present invention, the target heat exchange power of the battery is obtained, and after the target heat exchange power is determined, the actual heat exchange power of the battery can be adjusted based on the target heat exchange power, and the actual heat exchange power can be used for The actual value that characterizes the heat exchange power of the battery can be expressed by Q _{real exchange} .

Optionally, the process of adjusting the actual heat exchange power of the battery can be performed through the thermal management system. parameter implementation.

For example, the actual heat exchange power can be controlled by adjusting the flow rate of the heat exchange medium and the temperature of the heat exchange medium, so as to adjust the temperature of the battery during the charging and discharging process after the current time, wherein the adjustment of the heat exchange medium flow rate can be performed by q Representation, the heat exchange medium temperature can be represented by T _q .

For another example, it is assumed that the actual heat exchange power of the battery is positively correlated with the temperature difference between the battery temperature (T _bat ) and the temperature of the heat exchange medium (T _q ). As the flow rate of the heat exchange medium increases, the actual heat exchange power change tends to be gentle. When the flow rate of the heat exchange medium reaches a certain value, the actual heat exchange power hardly changes. By adjusting the flow rate of the heat exchange medium and the temperature response of the heat exchange medium When adjusting the complexity and response speed, you can give priority to adjusting the flow of heat exchange medium. When the flow rate of heat exchange medium cannot meet the requirements, adjust the temperature of heat exchange medium by adjusting the temperature control device, and then adjust the temperature of the battery (T _bat ) The temperature difference with the heat exchange medium temperature (T _q ), so as to achieve the purpose of adjusting the actual heat exchange power of the battery based on the target heat exchange power, wherein the temperature difference between the battery temperature (T _bat ) and the heat exchange medium temperature (T _q ) can be It is represented by ΔT.

Step S108, using the actual heat exchange power to adjust the temperature of the battery during the charging and discharging process after the current time.

In the technical solution of the above step S108 of the present invention, the target heat exchange power of the battery is obtained, and after the target heat exchange power is determined, the actual heat exchange power of the battery is adjusted according to the target heat exchange power, and the adjusted actual heat exchange power is used for the battery. The temperature during charging and discharging is controlled after the current time.

For example, heat can be transferred from the battery to the heat exchange device through heat conduction, and then transferred from the heat exchange device to the temperature control device through the heat convection of the heat exchange medium, so as to complete the process of adjusting the temperature of the battery during the charging and discharging process after the current time. , wherein the heat exchange device can be the water cooling plate of the liquid cooling system, the air duct of the air cooling system, the direct cooling plate of the direct cooling system, etc.; the heat exchange medium can be the cooling liquid of the liquid cooling system, the air of the air cooling system, the direct cooling The refrigerant of the system, etc.; the temperature control device can be the Chiller of the liquid cooling system, the evaporator of the air cooling system, the condenser of the direct cooling system, the WPTC heater of the liquid cooling system, the APTC heater of the air cooling system, and the module heating film. , Module heating plate, etc.

For another example, the system collects battery data (which may include temperature, current, SOC, SOH), heat exchange medium data (which may include temperature, flow rate), and ambient temperature through the sampling analysis module, and collects battery data and heat exchange medium data. After that, import the control module to calculate the battery heat production power, heat exchange power, and heat exchange parameters (which may include heat exchange medium flow, heat exchange medium and battery temperature difference), and finally confirm the demand control parameters (which may include flow rate, refrigeration unit power) and control The refrigeration unit and the heat exchange medium drive unit realize adjustment control.

In the above steps S102 to S108 of the present application, state data of the battery in the vehicle at the current moment is obtained, wherein the state data is used to represent the state of the battery during the charging and discharging process at the current moment; based on the state data, the target heat exchange power of the battery is determined; Based on the target heat exchange power, the actual heat exchange power of the battery is adjusted; the actual heat exchange power is used to adjust the temperature of the battery during the charging and discharging process after the current time, thereby achieving the technical effect of improving the efficiency of controlling the battery temperature of the vehicle, solving the problem of The technical problem of inefficiency in controlling the temperature of the battery of the vehicle.

The above method of this embodiment will be further described below.

As an optional embodiment, in step S104, determining the target heat exchange power of the battery based on the state data, including: determining the heat production power of the battery based on the battery temperature in the state data and the battery current in the state data; The battery temperature, the ambient temperature where the battery is located, and the temperature of the heat exchange medium in the vehicle, determine the target coefficient, where the target coefficient is used to characterize the degree of influence of the ambient temperature and the temperature of the heat exchange medium on the heat exchange power of the battery; based on the target coefficient and Heat production power, determine the target heat exchange power.

In this embodiment, the state data of the battery is obtained, and the battery temperature and battery current in the obtained state data are used to determine the heat generation power of the battery; at the same time, the battery temperature in the state data and the ambient temperature where the battery is located can be determined. Determine the target coefficient with the heat exchange medium temperature in the vehicle; determine the target heat exchange power of the battery based on the calculated target coefficient and heat production power, where the target coefficient can be used to characterize the environmental temperature and the heat exchange medium temperature on the battery. The degree of influence of heat exchange power; the heat generation power of the battery can be used to characterize the heat generation during the discharge process of the battery, which can be expressed by Q _production .

Optionally, the real-time calculation of the heat-producing power of the battery can be performed by using the obtained state data of the battery, and the calculation method can be as follows: Thermal power (Q _production ) can be expressed by the following formula:

Q _production = I ² R

Among them, the internal resistance of the battery can be tested on the battery in advance, and the corresponding parameters of the resistance can be expressed by the following formula under the four parameters of different battery real-time current, battery temperature, battery state of charge, and battery performance state:

R=f(SOC, T _bat , SOH, I)

Optionally, when four numerical values of battery real-time current, battery temperature, battery state of charge, and battery performance state are input, the magnitude of the resistance can be determined by using the data relationship obtained in advance.

As an optional embodiment, determining the target coefficient based on the battery temperature, the ambient temperature and the heat exchange medium temperature includes: determining a first coefficient based on the battery temperature and the ambient temperature, where the first coefficient is used to characterize the ambient temperature The degree of influence on the heat exchange power of the battery; the second coefficient is determined based on the ambient temperature and the temperature of the heat exchange medium, wherein the second coefficient is used to characterize the degree of influence of the temperature of the heat exchange medium on the heat exchange power of the battery; the first coefficient The ratio between the second coefficient and the second coefficient is determined as the target coefficient.

In this embodiment, the state data of the battery is obtained, the battery temperature, the ambient temperature and the temperature of the heat exchange medium are determined according to the state data of the battery, the first coefficient is determined according to the obtained battery temperature and the ambient temperature, and the first coefficient is determined according to the obtained environment The temperature and the temperature of the heat exchange medium determine the second coefficient, where the first coefficient can be used to characterize the degree of influence of the ambient temperature on the heat exchange power of the battery, and can also be called the battery environmental coefficient, which can be represented by α; the second coefficient It can be used to characterize the degree to which the temperature of the heat exchange medium affects the heat exchange power of the battery, which can be called the thermal efficiency of the vehicle thermal management system, which can be represented by β; after determining the first coefficient and the second coefficient, the first coefficient and the The ratio between the two coefficients is determined as the target coefficient.

Optionally, by determining the target coefficient through the battery temperature in the obtained state data, the ambient temperature where the battery is located, and the temperature of the heat exchange medium in the vehicle, the appropriate temperature range of the battery can be determined, wherein the appropriate temperature range of the battery can be It is used to characterize the maximum temperature value that the battery can withstand, which can be expressed by T _max , determine the suitable temperature range of the battery, compare the battery temperature with the suitable temperature range of the battery, and determine the first coefficient. It should be noted that the comparison results are different corresponding to The value of the first coefficient is also different.

Optionally, the second coefficient is obtained by comparing the battery ambient temperature and the battery heat exchange medium temperature, where the battery ambient temperature can be used to characterize the temperature value of the environment where the battery is located, which can be represented by T _rt , and the second coefficient can be expressed by β is represented. It should be noted that the second coefficient values corresponding to different comparison results are also different.

Optionally, the target coefficient may be the ratio of the first coefficient to the second coefficient, which may be represented by α/β.

As an optional embodiment, determining the target heat exchange power of the battery based on the target coefficient and the heat generation power includes: determining the product of the target coefficient and the heat generation power as the target heat exchange power.

In this embodiment, the target coefficient and heat production power of the battery are obtained, and the target heat exchange efficiency of the battery can be the product of the target coefficient and the heat production value of the battery during the discharge process, which can be expressed by the following formula:

Q _{eye change} = Q _production · α/β

As an optional embodiment, determining the first coefficient based on the battery temperature and the ambient temperature includes one of the following: determining the first coefficient in response to the battery temperature being not less than a temperature threshold and the battery temperature being greater than the ambient temperature; The battery temperature is not less than the temperature threshold and the battery temperature is equal to the ambient temperature, the first coefficient is determined; the first coefficient is determined in response to the battery temperature being not less than the temperature threshold and the battery temperature is less than the ambient temperature.

In this embodiment, the battery temperature and the ambient temperature are obtained, and the magnitude between the battery temperature and the ambient temperature is judged. In response to the battery temperature being greater than or equal to the temperature threshold, and the battery temperature is greater than the ambient temperature, the first The coefficient is a ₁ ; when the battery temperature is greater than or equal to the temperature threshold and the battery temperature is equal to the ambient temperature, the first coefficient can be determined to be a ₂ ; when the battery temperature is greater than or equal to the temperature threshold and the battery temperature is less than the ambient temperature, then The first coefficient can be determined as a ₃ , wherein the temperature threshold can be a value set according to the actual situation, a ₁ <a ₂ <a ₃ , and a ₁ , a ₂ , and a ₃ can be determined according to the actual situation or experimental data value, there is no specific restriction on the size of a ₁ , a ₂ , and a ₃ .

As an optional embodiment, determining the second coefficient based on the ambient temperature and the temperature of the heat exchange medium includes one of the following: determining the second coefficient in response to the temperature of the heat exchange medium being greater than the ambient temperature; determining the second coefficient in response to the temperature of the heat exchange medium Equal to the ambient temperature, the second coefficient is determined; in response to the heat exchange medium temperature being less than the ambient temperature, the second coefficient is determined.

In this embodiment, the ambient temperature and the temperature of the heat exchange medium are obtained, and the size between the ambient temperature and the temperature of the heat exchange medium is judged. In response to the temperature of the heat exchange medium being greater than the ambient temperature, the second coefficient can be determined as b ₁ ; in response to the temperature of the heat exchange medium being equal to the ambient temperature, the second coefficient can be determined to be b ₂ ; in response to the temperature of the heat exchange medium being lower than the ambient temperature, the second coefficient can be determined to be b ₃ , b ₁ <b ₂ <b ₃ , b ₁ , b ₂ , and b ₃ may be values determined according to actual conditions or experimental data, and the sizes of b ₁ , b ₂ , and b ₃ are not specifically limited here.

As an optional embodiment, in step S106, based on the target heat exchange power, adjusting the actual heat exchange power of the battery includes: based on the heat exchange medium flow rate or heat exchange medium temperature corresponding to the target heat exchange power in the database, adjusting the heat exchange medium to the vehicle. The flow rate of the heat exchange medium in the vehicle or the temperature of the heat exchange medium in the vehicle is adjusted; based on the adjusted flow rate of the heat exchange medium in the vehicle or the temperature of the heat exchange medium in the vehicle, the actual heat exchange power of the battery is adjusted.

In this embodiment, the target heat exchange power of the battery is obtained, the heat exchange medium flow rate or the heat exchange medium temperature corresponding to the target heat exchange power is determined based on the target heat exchange power, and the heat exchange medium corresponding to the target heat exchange power in the database is determined. Flow or heat exchange medium temperature, adjust the heat exchange medium flow in the vehicle or the heat exchange medium temperature in the vehicle, and complete the actual heat exchange of the battery based on the adjusted heat exchange medium flow in the vehicle or the heat exchange medium temperature in the vehicle Power regulation.

Optionally, by calibrating the battery thermal management system, parameters of the thermal management system are obtained by adjusting the parameters of the thermal management system, thereby determining how to adjust the actual heat exchange power of the battery.

In the process of battery heat exchange, the convective heat transfer coefficient is single-phase forced convective heat transfer in the case of air cooling or liquid cooling, so the calculation method of the convective heat transfer coefficient can be the heat transfer medium speed, characteristic length, fluid density, The specific functional relationship between fluid dynamic viscosity, thermal conductivity and constant pressure specific heat capacity, in which the convective heat transfer coefficient can be expressed by h, the heat transfer medium velocity can be expressed by v, the characteristic length can be expressed by l, and the fluid density can be expressed by ρ The fluid dynamic viscosity can be represented by η, the thermal conductivity can be represented by λ, the specific heat capacity at constant pressure can be represented by C _p , and the functional relationship can be represented by the following formula:

h=f(v, l, ρ, η, λ, C _p )

Among them, since the characteristic length of the flow channel of the specific structure remains unchanged, and the fluid density, hydrodynamic viscosity, thermal conductivity and constant pressure specific heat capacity of the specific fluid within the same working temperature range do not change much, the above formula can be further simplified. The above formula is expressed as:

h=f(v)

Therefore, the actual heat exchange power can be represented by Q _{actual exchange} = f(v, ΔT), that is, the actual heat exchange power of the battery at the current moment can be confirmed, and the actual heat exchange power (Q _{actual exchange} ) can be the convection heat transfer coefficient. (h), the heat exchange area (A) and the temperature difference (ΔT) between the heat exchange medium and the heat exchange surface, the product of the above three can be expressed by the following formula:

Q _{real conversion} = h·A·ΔT

Therefore, by confirming the relationship between the three variables of heat exchange medium flow (q), heat exchange medium temperature (T _q ), battery temperature (T _bat ) and the actual heat exchange power (Q _{actual exchange} ) The actual heat exchange power adjustment situation, in which, for a specific structure of the battery, only the convection heat transfer coefficient (h) and the temperature difference (ΔT) between the heat exchange medium and the heat exchange surface can be considered.

Optionally, to perform the calibration of the battery thermal management system, a battery thermal management parameter calibration bench may be built first, wherein the calibration bench may at least include: a battery pack containing a thermal management system, a heat exchange medium circuit, a refrigeration unit, a heat exchange A medium drive unit, a temperature monitoring and testing device, a battery pack charging and discharging device, a constant temperature environment chamber, etc., wherein the temperature monitoring and testing device may include testing the temperature of the battery and the temperature of the heat exchange medium.

Optionally, the calibration method of the thermal management system can be as follows: adjust the state of charge of the battery to 50%, place the battery in a specific temperature environment chamber for soaking, and after the conditions are completed, the average temperature of the battery is within the ambient temperature and fluctuates by 0.5°C. range, where a specific temperature can be represented by Trt1; after adjusting the battery state of charge to 50%, use a constant rate current to charge the battery state of charge from 50% to 60%, and then discharge it to 50%, and continue this cycle, while continuously feeding _a heat exchange medium with a specific flow rate and a specific temperature, and record the battery temperature at the end of each discharge cycle process. ₁ , the specific temperature of the heat exchange medium can be represented by T _q1 , and the battery temperature at the end of each discharge cycle can be represented by T _bat1 , T _bat2 , T _bat3 ...... T _batn respectively. The symbol representation is only for illustration, and as long as the symbol can represent the specified quantity, it can be within the protection scope of the embodiments of the present invention.

After recording the battery temperature at the end of each discharge cycle, compare the battery temperature after a discharge process with the battery temperature after the previous discharge process. When the difference in battery temperature after the discharge process is less than or equal to 0.2°C, it can be represented by T _batn -T _bat(n-1) ≤ 0.2°C, and the battery reaches a thermal equilibrium state. The thermal power is equal to the heat exchange power. After reaching the thermal equilibrium state, the charge-discharge cycle is stopped, and the heat exchange value, heat exchange medium flow rate, heat exchange medium temperature and battery temperature are recorded at this time.

On the basis of the above process, the heat exchange value, heat exchange medium flow rate, heat exchange medium temperature and battery temperature are obtained, and the charge-discharge rate remains unchanged. And compare the battery temperature after the discharge process with the battery temperature after the previous discharge process to obtain a new heat exchange power; change the charge and discharge rate, repeat the above operations, and finally complete the calibration of the thermal management system. The relationship between the three variables of the heat exchange medium flow (q), the heat exchange medium temperature (T _q ), the battery temperature (T _bat ) and the actual heat exchange power (Q _{actual exchange} ) can be expressed by the following formula:

Q _{real conversion} = f(q, T _q , T _bat )

Optionally, since the temperature of the heat _exchange medium (T _q ) in the battery thermal management system changes little, the above formula can be expressed by Q = f(q, ΔT), where ΔT can be the battery temperature (T _bat ) and the temperature of the heat exchange medium (T _q ), can be expressed by Q _{real exchange} =f[q, (T _q -T _bat )], therefore, when the battery temperature (T _bat ) remains unchanged The actual heat exchange power can be controlled by adjusting the heat exchange medium flow rate (q) and the heat exchange medium temperature (T _q ).

In this embodiment, the state data of the battery in the vehicle at the current moment is acquired in real time, the target heat exchange power of the battery is determined, the actual heat exchange power of the battery is adjusted based on the target heat exchange power, and the actual heat exchange power is used to adjust the battery after the current moment. The temperature in the process of charging and discharging, thereby achieving the technical effect of improving the efficiency of controlling the temperature of the battery of the vehicle, and solving the technical problem of low efficiency of controlling the temperature of the battery of the vehicle.

Example 2

The technical solutions of the embodiments of the present invention are illustrated below with reference to the preferred embodiments.

During vehicle driving, the control of battery thermal management is an important indicator to ensure battery safety. Therefore, in the control of battery thermal management, the actual heat exchange power is calculated by calculating the target heat exchange power and the actual heat exchange power of the battery. The power adjusts the temperature of the battery during the charging and discharging process after the current time, realizes the control of the thermal management of the battery, and improves the efficiency of controlling the temperature of the vehicle battery.

In a related art, the control method for vehicle battery thermal management usually takes the battery temperature as the main control input source, but the temperature sensors of the existing battery cells are all arranged on the outer surface of the battery cells, and the heat transfer takes time, which requires time. This control method that uses temperature as the main input source has hysteresis, and needs to reserve more threshold margin to ensure that the battery temperature is controlled within a suitable range, which will lead to an increase in energy consumption and further aggravate the anxiety of driving range.

In another related technology, a power battery thermal management method based on intervention time is proposed. Whether or not the method adjusts the battery temperature depends on the system equivalent convective heat transfer coefficient h and its pre-calibrated system critical heat transfer coefficient Compared with h _cr , it is necessary to predict the battery temperature for a certain period of time in the future according to the current working conditions to determine the temperature intervention mode, but this method needs to predict the temperature of the battery, which has the problem of low control accuracy.

In another related art, a battery thermal management control method device medium and device is also proposed. The method estimates heat production according to the SOC and current temperature of the battery, but the method does not mention the power of heating and cooling. The specific adjustment method does not mention the relationship between heat exchange power and thermal management system parameters such as heat exchange medium flow, heat exchange medium and battery temperature difference, nor does it mention the concept of heat exchange power.

In another related art, a method for controlling battery thermal management is also proposed. The method uses battery temperature, SOH, and SOC to judge the preset state of the battery, and mentions using thermal management parameter adjustment to adjust the cooling capacity. However, this method only mentions the use of battery temperature, SOH, and SOC to judge the preset state of battery thermal management, and does not mention the fundamental relationship between battery heat production power and heat exchange power. slow problem.

In order to solve the above problem, the embodiment of the present invention proposes the calculation of the target heat exchange power and the actual heat exchange power of the battery, and uses the actual heat exchange power to adjust the temperature of the battery during the charging and discharging process after the current time, so as to realize the thermal management of the battery. Control, does not need to predict the temperature of the battery, the control is more accurate, the adjustment parameters are the heat exchange medium flow and the heat exchange medium temperature, which are the direct influence items of heat production, which can quickly adjust the battery temperature in real time and improve the control of the vehicle. Efficiency over battery temperature.

The embodiments of the present invention will be further introduced below.

FIG. 2 is a flowchart of another method for adjusting battery temperature according to an embodiment of the present invention. As shown in FIG. 2 , another method for adjusting battery temperature includes the following steps.

In step S201, the battery temperature and the battery temperature threshold are obtained and compared.

In this embodiment of the present invention, the battery temperature and the battery temperature threshold are obtained, and the two are compared, wherein the battery temperature can be used to characterize the real-time temperature of the battery, which can be represented by T _bat , and the battery temperature threshold can be used to characterize the battery The suitable temperature range of , can be the upper limit of critical temperature, which can be represented by T _max .

Optionally, the battery temperature can be obtained through a temperature sensor, and when the battery temperature (T _bat ) is greater than or equal to the battery temperature threshold (T _max ), step S202 is performed; otherwise, the battery temperature and the battery temperature threshold are continuously obtained and compared until the battery temperature is satisfied. When the temperature is greater than or equal to the battery temperature threshold, step S202 is executed.

Step S202, calculating the heat generation power of the battery.

In the embodiment of the present invention, when the battery temperature is greater than or equal to the battery temperature threshold, the calculation of the battery heat generation power is performed, and when the battery heat generation power is calculated, the battery temperature, the battery state of charge, the battery real-time current and the battery performance state are obtained. Calculation, where the real-time current of the battery can be represented by I.

Optionally, the real-time current of the battery can be obtained through a current sensor; the current state of charge of the battery and the battery performance state can be obtained through calculation by the battery management system.

Optionally, the heat production of the battery can be the heat production during the discharge process of the battery, which can be represented by Q _production , and the product of the square value of the real-time battery current (I) and the battery internal resistance (R) can be determined as the battery heat production power. (Q _production ), can be expressed by the following formula:

Q _production = I ² R

Among them, the internal resistance of the battery can be obtained by testing the battery cell to obtain the corresponding relationship, and can be obtained by entering four values of the battery real-time current, battery temperature, battery state of charge, and battery performance state, which can be expressed by the following formula:

R=f(SOC, T _bat , SOH, I)

Step S203, calculating the heat exchange power of the battery.

In this embodiment, after the calculation of the heat production power of the battery is completed, the calculation of the heat exchange power of the battery is performed, wherein, when the heat exchange power of the battery is calculated, the ambient temperature and the temperature of the heat exchange medium can be obtained. Among them, the ambient temperature can be used to characterize the temperature of the environment where the battery is located, which can be represented by T _rt , and the temperature of the heat exchange medium can be used to characterize the temperature value of the heat exchange medium of the battery, which can be represented by T _q .

Optionally, calculate the heat exchange power of the battery, and determine the environmental coefficient (α) by comparing the ambient temperature (T _rt ) with the battery temperature, in response to the battery temperature being greater than or equal to the temperature threshold, and when the battery temperature is greater than the ambient temperature. , the environmental coefficient can be determined to be a ₁ ; in response to the battery temperature being greater than or equal to the temperature threshold, and the battery temperature is equal to the ambient temperature, the environmental coefficient can be determined to be a ₂ ; in response to the battery temperature being greater than or equal to the temperature threshold, and the battery temperature is less than the ambient temperature At the temperature, the environmental coefficient can be determined as a ₃ , wherein the temperature threshold can be a value set according to the actual situation, a ₁ <a ₂ <a ₃ , a ₁ , a ₂ , a ₃ can be based on the actual situation or experiment The value determined by the data, and there is no specific restriction on the size of a ₁ , a ₂ , and a ₃ here.

Optionally, to determine the thermal efficiency of the thermal management system, it can be represented by β. When determining the thermal efficiency of the thermal management system, the ambient temperature (T _rt ) can be compared with the temperature of the heat exchange medium (T _q ), in response to the heat exchange medium. When the temperature is greater than the ambient temperature, the thermal efficiency can be determined as b ₁ ; when the temperature of the heat exchange medium is equal to the ambient temperature, the thermal efficiency can be determined as b ₂ ; when the temperature of the heat exchange medium is less than the ambient temperature, the thermal efficiency can be determined as b ₃ , b ₁ <b ₂ <b ₃ , b ₁ , b ₂ , and b ₃ may be values determined according to actual conditions or experimental data, and the sizes of b ₁ , b ₂ , and b ₃ are not specifically limited here.

Optionally, after determining the environmental coefficient and thermal efficiency, the heat exchange power of the battery can be used to characterize the target value of the heat exchange power of the battery, which can be expressed by Q _-exchange , which can be the ratio of the ratio of the environmental coefficient to the thermal efficiency and the heat production power of the battery. The product can be expressed by the following formula:

Q _{eye change} = Q _production · α/β

Step S204, use heat exchange power for cooling.

In this embodiment, after the calculation of the heat generation power of the battery is completed, the heat exchange power is used to cool the battery, wherein the cooling process can be completed by the battery thermal management system.

Optionally, the heat exchange power of the thermal management system to the battery is adjusted to the heat exchange power calculated in step S203, and the actual heat exchange power of the battery can be calculated according to the Newton cooling formula, which can be calculated by Q _{actual exchange} = h·A· ΔT is calculated, where Q _{actual exchange} can be the current actual heat exchange power of the battery, h can be the convective heat transfer coefficient, A can be the heat exchange area, ΔT can be the temperature difference between the heat exchange medium and the heat exchange surface, where, for The specific structure of the battery only needs to consider the convective heat transfer coefficient and the temperature difference between the heat transfer medium and the heat transfer surface.

Optionally, since the heat exchange process of the battery is single-phase forced convection heat exchange whether it is air-cooled or liquid-cooled, h=f(v, l, ρ, η, λ, C _p ), where, h can be the convective heat transfer coefficient, v can be the heat transfer medium velocity, l can be the characteristic length, ρ can be the fluid density, η can be the hydrodynamic viscosity, λ can be the thermal conductivity, and C _p can be the constant pressure specific heat capacity, since The characteristic length of the channel of a specific structure is unchanged, and the fluid density, hydrodynamic viscosity, thermal conductivity and constant pressure specific heat capacity of a specific fluid within the same working temperature range do not change much. Therefore, the above formula can be further simplified and can be expressed by the following formula:

h=f(v)

Therefore, the actual heat exchange power can be expressed by Q _{real exchange} = f(v, ΔT).

Optionally, the process of adjusting the actual heat exchange power of the battery can be performed through the thermal management system. parameter implementation.

Optionally, by calibrating the battery thermal management system, the parameters of the thermal management system can be adjusted to determine how to adjust the actual heat exchange power of the battery. The relationship between the three variables of T _q ), battery temperature (T _bat ) and the actual heat exchange power (Q _{actual exchange} ) is used to complete the calibration of the thermal management system.

Optionally, to perform the calibration of the battery thermal management system, a battery thermal management parameter calibration bench may be built first, wherein the calibration bench may at least include: a battery pack containing a thermal management system, a heat exchange medium circuit, a refrigeration unit, a heat exchange A medium drive unit, a temperature monitoring and testing device, a battery pack charging and discharging device, a constant temperature environment chamber, etc., wherein the temperature monitoring and testing device may include testing the temperature of the battery and the temperature of the heat exchange medium.

Optionally, the calibration method of the thermal management system can be as follows: firstly, adjust the state of charge of the battery to 50%, and place the battery in a specific temperature environment chamber for soaking. Within the range of ℃, the specific temperature can be represented by Trt1; after adjusting the battery state of charge to 50%, use a constant rate current to charge the battery state of charge from 50% to 60%, and then discharge it to 50%, and continue During this cycle, a heat exchange medium with a specific flow rate and a specific temperature is continuously fed, and the battery temperature at the end of each discharge cycle process is recorded. The constant rate current can be represented by I ₁ , and the specific flow rate of the heat exchange medium can be expressed by q ₁ , the specific temperature of the heat exchange medium can be represented by T _q1 , and the battery temperature at the end of each discharge cycle can be represented by T _bat1 , T _bat2 , T _bat3 ...... T _batn respectively, it should be noted that this The symbols indicated here are only for illustration, and as long as the symbols that can represent the specified quantity can be within the protection scope of the embodiments of the present invention.

Optionally, after recording the battery temperature at the end of each discharge cycle, compare the battery temperature after a certain discharge process with the battery temperature after the previous discharge process. When the difference between the temperature and the battery temperature after the last discharge process is less than or equal to 0.2°C, it can be represented by T _batn -T _bat(n-1) ≤ 0.2°C. At this time, the battery reaches a thermal equilibrium state, where the thermal equilibrium state can be The heat generation power of the battery is equal to the heat exchange power. After reaching the thermal equilibrium state, the charge and discharge cycle is stopped, and the heat exchange value, heat exchange medium flow rate, heat exchange medium temperature and battery temperature are recorded at this time.

Optionally, after obtaining the heat exchange value, heat exchange medium flow rate, heat exchange medium temperature and battery temperature, keep the charge and discharge rate unchanged, change the heat exchange medium flow rate and heat exchange medium temperature, repeat the cycle process of battery charge and discharge, and Compare the battery temperature after the discharge process with the battery temperature after the last discharge process to obtain the new heat exchange power; change the charge and discharge rate, repeat the above operations, and finally complete the calibration of the thermal management system, get The relationship between the three variables of heat exchange medium flow (q), heat exchange medium temperature (T _q ), battery temperature (T _bat ) and the actual heat exchange power (Q _{actual exchange} ) can be expressed by the following formula:

Q _{real conversion} =f(q, T _q ,, T _bat )

Optionally, since the temperature of the heat _exchange medium (T _q ) in the battery thermal management system changes little, the above formula can be expressed by Q = f(q, ΔT), where ΔT can be the battery temperature (T _bat ) and the temperature of the heat exchange medium (T _q ), can be expressed by Q _{real exchange} =f[q, (T _q -T _bat )], therefore, when the battery temperature (T _bat ) remains unchanged The actual heat exchange power can be controlled by adjusting the heat exchange medium flow rate (q) and the heat exchange medium temperature (T _q ).

For example, FIG. 3 is a schematic diagram of a calibration result of a battery thermal management system according to an embodiment of the present invention. As shown in FIG. 3 , the heat exchange power (Q _exchange ) has a linear relationship with the temperature difference (ΔT), and ΔT increases with the The Q _exchange increases with the increase of the heat exchange medium. At the same time, the Q _exchange changes slowly with the increase of the heat exchange medium flow rate (q). When the heat exchange medium flow rate (q) reaches a certain value, continue to increase the heat exchange medium flow rate (q). The increased effect of Q- _swap decreases.

Optionally, when adjusting the complexity and response speed by adjusting the heat exchange medium flow rate and the heat exchange medium temperature, priority is given to adjusting the heat exchange medium flow rate. The temperature of the heat exchange medium is adjusted, thereby adjusting the temperature difference ΔT between the battery temperature (T _bat ) and the temperature of the heat exchange medium (T _q ).

Optionally, FIG. 4 is a schematic device diagram of a battery thermal management system according to an embodiment of the present invention. As shown in FIG. 4 , a necessary system for implementing the control cooling method may include: a heat exchange device for direct heat exchange with the battery 401 402, wherein, the heat exchange device 402 can be a device that transfers the heat of one fluid to another fluid, and can be a water cooling plate of a liquid cooling system, an air duct of an air cooling system, a direct cooling plate of a direct cooling system, etc.; The heat exchange medium drive unit 403, wherein the heat exchange medium drive unit 403 can be the cooling liquid of the liquid cooling system, the air of the air cooling system, the refrigerant of the direct cooling system, etc.; the heat exchange device 404 for adjusting the temperature of the heat exchange medium, wherein, The heat exchange device 404 can be the Chiller of the liquid cooling system, the evaporator of the air cooling system, the condenser of the direct cooling system, the WPTC heater of the liquid cooling system, the APTC heater of the air cooling system, the module heating film, the module heating A sampling and analysis module 405 capable of collecting necessary data, wherein the sampling and analysis module 405 may be a chip; a control module 406 capable of executing control logic, wherein the control module 406 may be a chip, and may include a battery heat generating module 407, a heat exchanger Thermal power calculation module 408 and heat exchange parameter adjustment module 409 .

Optionally, heat is transferred from the battery to the heat exchange device 402 by thermal conduction, and then transferred from the heat exchange device to the heat exchange device 404 by thermal convection of the heat exchange medium.

Optionally, the system collects battery data (may include temperature, current, SOC, SOH), heat exchange medium data (may include temperature, flow rate), and ambient temperature through the sampling analysis module 405, and import the control module 406 to calculate the battery heat production power, Heat exchange power, heat exchange parameters (may include heat exchange medium flow rate, heat exchange medium and battery temperature difference), and finally confirm demand control parameters (may include flow rate, cooling unit power) and control the cooling unit and heat exchange medium drive unit 403 to achieve cooling control.

In this embodiment, the state data of the battery in the vehicle at the current moment is acquired in real time, the target heat exchange power of the battery is determined, the actual heat exchange power of the battery is adjusted based on the target heat exchange power, and the actual heat exchange power is used to adjust the battery after the current moment. The temperature in the process of charging and discharging, thereby achieving the technical effect of improving the efficiency of controlling the temperature of the battery of the vehicle, and solving the technical problem of low efficiency of controlling the temperature of the battery of the vehicle.

Example 3

According to an embodiment of the present invention, a battery temperature adjustment device is also provided. It should be noted that the device for adjusting battery temperature can be used to implement the method for adjusting battery temperature in Embodiment 1.

FIG. 5 is a schematic diagram of an apparatus for adjusting the temperature of a battery according to an embodiment of the present invention. As shown in FIG. 5 , the battery temperature adjustment device 500 may include: an acquisition unit 502 , a determination unit 504 , a first adjustment unit 506 and a second adjustment unit 508 .

The obtaining unit 502 is configured to obtain the state data of the battery in the vehicle at the current moment, wherein the state data is used to represent the state of the battery during the charging and discharging process at the current moment;

a determining unit 504, configured to determine the target heat exchange power of the battery based on the state data;

a first adjustment unit 506, configured to adjust the actual heat exchange power of the battery based on the target heat exchange power;

The second adjusting unit 508 is configured to use the actual heat exchange power to adjust the temperature of the battery during the charging and discharging process after the current time.

Optionally, the determining unit 504 includes: a first determining module for determining the heat production power of the battery based on the battery temperature in the state data and the battery current in the state data; a second determining module for determining the heat-producing power of the battery based on the battery temperature, The ambient temperature and the temperature of the heat exchange medium in the vehicle are used to determine the target coefficient, wherein the target coefficient is used to characterize the degree of the influence of the ambient temperature and the temperature of the heat exchange medium on the heat exchange power of the battery; the third determination module is used based on The target coefficient and heat production power determine the target heat exchange power.

Optionally, the second determination module includes: a first determination sub-module, configured to determine a first coefficient based on the battery temperature and the ambient temperature, where the first coefficient is used to represent the degree of influence of the ambient temperature on the heat exchange power of the battery; The second determination submodule is used for determining a second coefficient based on the ambient temperature and the temperature of the heat exchange medium, wherein the second coefficient is used to represent the degree of influence of the temperature of the heat exchange medium on the heat exchange power of the battery; the third determination submodule, Used to determine the ratio between the first coefficient and the second coefficient as the target coefficient.

Optionally, the third determination module includes: a fourth determination sub-module, configured to determine the product between the target coefficient and the heat generation power as the target heat exchange power.

Optionally, the first determination sub-module includes one of the following: for responding that the battery temperature is not less than the temperature threshold, and the battery temperature is greater than the ambient temperature; or responding that the battery temperature is not less than the temperature threshold, and the battery temperature is equal to the ambient temperature; or responding to the battery temperature When the temperature is not less than the temperature threshold, and the battery temperature is less than the ambient temperature, the first coefficient is determined.

Optionally, the second determination sub-module includes one of the following: in response to the temperature of the heat exchange medium being greater than the ambient temperature; or in response to the temperature of the heat exchange medium being equal to the ambient temperature; or in response to the temperature of the heat exchange medium being smaller than the ambient temperature, performing the second coefficient calculation. Sure.

Optionally, the first adjustment unit 506 includes: a first adjustment module, configured to adjust the flow rate of the heat exchange medium in the vehicle or the heat exchange medium in the vehicle based on the flow rate of the heat exchange medium or the temperature of the heat exchange medium corresponding to the target heat exchange power in the database. The temperature is adjusted; the second adjustment module is used to adjust the actual heat exchange power of the battery based on the adjusted flow rate of the heat exchange medium in the vehicle or the temperature of the heat exchange medium in the vehicle.

In the embodiment of the present invention, the state data of the battery in the vehicle at the current moment is obtained by the obtaining unit; the target heat exchange power of the battery is determined based on the state data by the determining unit; Adjust the actual heat exchange power of the battery; through the second adjustment unit, use the actual heat exchange power to adjust the temperature of the battery during the charging and discharging process after the current moment. That is to say, the present invention determines the target heat exchange power of the battery by acquiring the state data of the battery in the vehicle at the current moment in real time, adjusts the actual heat exchange power of the battery based on the target heat exchange power, and uses the actual heat exchange power to adjust the The temperature during the charging and discharging process after the current time, thereby achieving the technical effect of improving the efficiency of controlling the battery temperature of the vehicle, and solving the technical problem of low efficiency in controlling the battery temperature of the vehicle.

Example 4

According to an embodiment of the present invention, a computer-readable storage medium is further provided, and the storage medium includes a stored program, wherein the program executes the method for adjusting the battery temperature in the first embodiment.

Example 5

According to an embodiment of the present invention, there is also provided a processor for running a program, wherein the method for adjusting the battery temperature in Embodiment 1 is executed when the program is running.

Example 6

According to an embodiment of the present invention, there is also provided a vehicle for implementing the method for adjusting the battery temperature in the first embodiment.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages or disadvantages of the embodiments.

In the above-mentioned embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are only illustrative, for example, the division of the units may be a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of units or modules, and may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes .

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. A method for regulating a temperature of a battery, comprising:

acquiring state data of a battery in a vehicle at the current moment, wherein the state data is used for representing the state of the battery in the charging and discharging process at the current moment;

determining a target heat exchange power of the battery based on the state data;

adjusting the actual heat exchange power of the battery based on the target heat exchange power;

and adjusting the temperature of the battery in the charging and discharging process after the current moment by using the actual heat exchange power.

2. The method of claim 1, wherein determining a target heat transfer power for the battery based on the status data comprises:

determining a heat generating power of the battery based on the battery temperature in the status data and the battery current in the status data;

determining a target coefficient based on the battery temperature, the ambient temperature of the battery and the temperature of a heat exchange medium in the vehicle, wherein the target coefficient is used for representing the degree of influence of the ambient temperature and the temperature of the heat exchange medium on the heat exchange power of the battery;

and determining the target heat exchange power based on the target coefficient and the heat generation power.

3. The method of claim 2, wherein determining the target coefficient based on the battery temperature, the ambient temperature, and the heat transfer medium temperature comprises:

determining a first coefficient based on the battery temperature and the ambient temperature, wherein the first coefficient is used for representing the influence degree of the ambient temperature on the heat exchange power of the battery;

determining a second coefficient based on the ambient temperature and the heat exchange medium temperature, wherein the second coefficient is used for representing the degree of influence of the heat exchange medium temperature on the heat exchange power of the battery;

determining a ratio between the first coefficient and the second coefficient as the target coefficient.

4. The method of claim 3, wherein determining a target heat transfer power for the battery based on the target coefficient and the heat generation power comprises:

and determining the product between the target coefficient and the heat generation power as the target heat exchange power.

5. The method of claim 3, wherein determining the first coefficient based on the battery temperature and the ambient temperature comprises one of:

in response to the battery temperature not being less than a temperature threshold and the battery temperature being greater than the ambient temperature, determining the first coefficient;

in response to the battery temperature not being less than the temperature threshold and the battery temperature being equal to the ambient temperature, determining the first coefficient;

in response to the battery temperature not being less than the temperature threshold and the battery temperature being less than the ambient temperature, determining the first coefficient.

6. The method of claim 3, wherein determining the second coefficient based on the ambient temperature and the heat transfer medium temperature comprises one of:

determining the second coefficient in response to the heat exchange medium temperature being greater than the ambient temperature;

determining the second coefficient in response to the heat exchange medium temperature being equal to the ambient temperature;

determining the second coefficient in response to the heat exchange medium temperature being less than the ambient temperature.

7. The method of any one of claim 1, wherein adjusting the actual heat exchange power of the battery based on the target heat exchange power comprises:

adjusting the flow rate of the heat exchange medium in the vehicle or the temperature of the heat exchange medium in the vehicle based on the flow rate of the heat exchange medium or the temperature of the heat exchange medium corresponding to the target heat exchange power in a database;

and adjusting the actual heat exchange power of the battery based on the adjusted flow rate of the heat exchange medium in the vehicle or the adjusted temperature of the heat exchange medium in the vehicle.

8. A device for regulating the temperature of a battery, comprising:

the system comprises an acquisition unit, a storage unit and a control unit, wherein the acquisition unit is used for acquiring state data of a battery in a vehicle at the current moment, and the state data is used for representing the state of the battery in the charging and discharging process at the current moment;

the determining unit is used for determining the target heat exchange power of the battery based on the state data;

the first adjusting unit is used for adjusting the actual heat exchange power of the battery based on the target heat exchange power;

and the second adjusting unit is used for adjusting the temperature of the battery in the charging and discharging process after the current moment by using the actual heat exchange power.

9. A computer-readable storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the method of any one of claims 1-7.

10. A vehicle, characterized by being configured to perform the method of any one of claims 1 to 7.

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