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CN116845431A - Battery thermal management control method, battery thermal management system and vehicle - Google Patents

Battery thermal management control method, battery thermal management system and vehicle Download PDF

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Publication number
CN116845431A
CN116845431A CN202210288967.9A CN202210288967A CN116845431A CN 116845431 A CN116845431 A CN 116845431A CN 202210288967 A CN202210288967 A CN 202210288967A CN 116845431 A CN116845431 A CN 116845431A
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China
Prior art keywords
battery
temperature
energy
thermal management
control method
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Pending
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CN202210288967.9A
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Chinese (zh)
Inventor
刘财志
孙海祥
李昭健
李国军
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Weilai Automobile Technology Anhui Co Ltd
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Weilai Automobile Technology Anhui Co Ltd
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Priority to CN202210288967.9A priority Critical patent/CN116845431A/en
Publication of CN116845431A publication Critical patent/CN116845431A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a battery thermal management control method, a battery thermal management system and a vehicle, wherein the control method comprises the following steps: s1: acquiring the habit and navigation data of a user, and predicting the duration time of an upcoming trip and the battery state according to the habit and the navigation data; s2: acquiring the current battery temperature T, and calculating the energy W consumed by the battery from the temperature T to the completion of the travel 1 The method comprises the steps of carrying out a first treatment on the surface of the S3: setting a target battery temperature T 0 The energy W consumed by the battery from the start of operation at the temperature T0 until the completion of the stroke is calculated 2 Adjusting the temperature T to the temperature T 0 Energy W consumed 3 And calculate W 4 =W 2 +W 3 The method comprises the steps of carrying out a first treatment on the surface of the S4: determining energy W 4 Whether or not it is smaller than energy W 1 If yes, executing step S5; s5: temperature TAdjust to temperature T 0 The method comprises the steps of carrying out a first treatment on the surface of the S6: and acquiring the current environment temperature of the vehicle in real time, solving a difference value between the current environment temperature and the environment temperature at the beginning of the journey, judging whether the absolute value of the difference value is smaller than a preset threshold value, and if so, returning to the step S1.

Description

Battery thermal management control method, battery thermal management system and vehicle
Technical Field
The invention relates to the technical field of vehicle battery thermal management, in particular to a battery thermal management control method, a battery thermal management system for executing the battery thermal management control method and a vehicle with the battery thermal management system.
Background
At present, a thermal management mode of the power battery mainly adopts simple temperature threshold control, and the battery is simply and mechanically thermally managed according to the battery temperature in the running process of the vehicle. This thermal management approach ignores the heat generation and dissipation of the battery itself, resulting in lower thermal management efficiency. In addition, most of the current thermal management methods do not consider the habit of the user and the trip data, which may cause the thermal management system to be normally opened and closed in a shorter trip, and additional energy consumption is increased.
Disclosure of Invention
The technical problem to be solved by one aspect of the invention is how to perform heat management on the battery under the condition of taking into consideration heat generation and heat dissipation of the battery and the habit of a user.
In addition, other aspects of the present invention are directed to solving or alleviating other technical problems of the prior art.
The invention provides a battery thermal management control method, a battery thermal management system and a vehicle, and particularly provides a battery thermal management control method, a battery thermal management system and a vehicle according to one aspect of the invention:
a battery thermal management control method comprises the following steps:
s1: acquiring habit data and vehicle navigation data of a user, and predicting the duration of an upcoming trip and the battery state in the duration according to the habit data and the vehicle navigation data;
s2: acquiring the current battery temperature T, and calculating the energy W to be consumed by the battery from the current battery temperature T until the travel is completed according to the prediction in the step S1 1 ；
S3: setting a target battery temperature T 0 According to the pre-preparation in step S1Measuring and calculating the battery to obtain the target battery temperature T 0 The energy W to be consumed until the stroke is completed 2 And adjusting the current battery temperature T to the target battery temperature T 0 Energy W to be consumed 3 And find the energy W 2 And energy W 3 The sum is the energy W 4 ；
S4: determining the energy W 4 Whether or not to be smaller than the energy W 1 If yes, executing step S5, if no, not performing any operation;
s5: adjusting the current battery temperature T to the energy W 4 Corresponding target battery temperature T 0 。
Optionally, according to an embodiment of the present invention, step S1 further includes the steps of:
and judging whether the duration is smaller than a preset time threshold, if so, not executing the steps after the step S1, and if not, executing the step S2.
Alternatively, according to one embodiment of the invention, the time threshold is between 5 minutes and 10 minutes.
Alternatively, according to one embodiment of the present invention, the battery state includes a current, an SOC, an internal resistance, and a temperature of the battery.
Alternatively, according to one embodiment of the present invention, in step S3, a plurality of target battery temperatures T are set 0 For each target battery temperature T 0 The corresponding energy W is calculated 4 And calculating the minimum energy W from the calculated energy 4 For combining with energy W in step S4 1 A comparison is made to determine whether to adjust the current battery temperature to correspond to the minimum energy W 4 Is set, the target battery temperature of (a) is set.
Optionally, according to an embodiment of the present invention, step S3 further includes the steps of:
judging whether the battery needs to be cooled or heated according to the ambient temperature of the battery, and if the battery needs to be cooled, determining the target battery temperature T 0 Is set to be smaller than the current battery temperature T, and if heating is required, the target battery temperature is set to be smaller than the current battery temperature TT 0 Is set to be greater than the current battery temperature T.
Alternatively, according to one embodiment of the present invention, in step S3, a target battery temperature T is set when the battery needs cooling 0 Setting a target battery temperature T when the battery needs to be heated to be more than or equal to T-delta T 0 And less than or equal to T+DeltaT, wherein DeltaT is a preset constant temperature value.
Alternatively, according to one embodiment of the invention, Δt is 5-10 ℃ and the value of Δt is an integer.
Alternatively, according to one embodiment of the present invention, the plurality of target battery temperatures T when the battery needs cooling 0 For an arithmetic progression from T-DeltaT to T with s as the difference, the plurality of target battery temperatures T when the battery needs to be heated 0 An arithmetic series of differences from T to T+DeltaT with s as the difference, where s is a predetermined temperature value.
Alternatively, s is 0.5 ℃ or 1 ℃ according to one embodiment of the invention.
Optionally, according to an embodiment of the present invention, the battery thermal management control method further includes the steps of:
s6: and in the journey, acquiring the current ambient temperature of the vehicle in real time, solving a temperature difference value between the current ambient temperature of the vehicle and the ambient temperature of the vehicle at the beginning of the journey, judging whether the absolute value of the temperature difference value is larger than a preset temperature threshold value, if so, re-executing the step S1, and if not, not performing any operation.
Alternatively, according to one embodiment of the invention, the temperature threshold is 5-10 ℃.
According to another aspect of the present invention, there is provided a battery thermal management system for performing the above battery thermal management control method, the battery thermal management system including
An input module; the input module acquires the habit data of the user, the navigation data of the vehicle and the battery state and transmits the habit data, the navigation data and the battery state to the prediction module;
a prediction module; the prediction module predicts the duration of the journey to be performed by the user and the battery state in the duration according to the information transmitted by the input module;
a computing module; the calculation module sets a target battery temperature T 0 And calculates the energy consumed by the battery to start and complete the journey at the current battery temperature T according to the prediction of the prediction module, and calculates the target battery temperature T 0 Starting and completing the energy consumed by the trip and adjusting the battery from the current battery temperature T to the target battery temperature T 0 Energy to be consumed;
an output module; the output module processes the calculation result of the calculation module and outputs a corresponding control instruction to an execution part of the battery thermal management system so as to enable the execution part to perform corresponding operation;
the input module and the prediction module, the prediction module and the calculation module, and the calculation module and the output module are in communication with each other.
According to yet another aspect of the present invention, there is provided a vehicle, wherein the vehicle comprises the battery thermal management system described above.
The invention has the advantages that:
1. predicting the upcoming travel and battery state according to the habit of the user and the navigation data, taking all the upcoming travel and battery state into consideration when performing battery thermal management, and obtaining the optimal target battery temperature by integrating various factors;
2. the method comprises the steps that the duration of a journey is predicted when the journey starts, and battery thermal management is not started when the duration of the journey is short, so that unnecessary starting of a thermal management system is avoided, and energy consumption is saved;
3. the heat generation and the heat dissipation of the battery are taken into consideration during the heat management, so that the efficiency of the heat management of the battery is improved;
4. the climate or temperature change in the vehicle journey is considered, and when the temperature change is large, the temperature of the battery is timely adjusted through the thermal management system.
Drawings
The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,
FIG. 1 illustrates a flow chart of a proposed battery thermal management control method according to one embodiment of the present invention;
fig. 2 illustrates a schematic structure of a battery thermal management system according to an embodiment of the present invention.
Detailed Description
It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various structural manners and implementation manners that may be replaced with each other without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and distinguishing purposes only and are not to be construed as indicating or implying a relative importance of the corresponding components.
Referring to fig. 1, a flowchart of a battery thermal management control method according to an embodiment of the present invention is shown. The battery thermal management control method of the invention comprises the following steps:
s1: acquiring habit data and vehicle navigation data of a user, and predicting the duration of an upcoming trip and the battery state in the duration according to the habit data and the vehicle navigation data;
s2: acquiring the current battery temperature T, and calculating the energy W to be consumed by the battery from the current battery temperature T until the travel is completed according to the prediction in the step S1 1 ；
S3: is provided withTargeting battery temperature T 0 Calculating the battery to the target battery temperature T according to the prediction in step S1 0 The energy W to be consumed until the stroke is completed 2 And adjusting the current battery temperature T to the target battery temperature T 0 Energy W to be consumed 3 And find the energy W 2 And energy W 3 The sum is the energy W 4 ；
S4: determining the energy W 4 Whether or not to be smaller than the energy W 1 If yes, executing step S5, if no, not performing any operation;
s5: adjusting the current battery temperature T to the energy W 4 Corresponding target battery temperature T 0 ；
S6: and in the journey, acquiring the current ambient temperature of the vehicle in real time, solving a temperature difference value between the current ambient temperature of the vehicle and the ambient temperature of the vehicle at the beginning of the journey, judging whether the absolute value of the temperature difference value is larger than a preset temperature threshold value, if so, re-executing the step S1, and if not, not performing any operation.
In step S1, the habit data and the navigation data of the user are obtained from a big data terminal or cloud terminal through a network. The vehicle can automatically collect the vehicle habit of the user through the network, for example, the travel of the user in a fixed time, such as the travel of the user on duty and off duty every day, the starting and stopping times of the user on the vehicle in the travel, the average vehicle speed and the like, and the data are uploaded to the cloud for processing through the network and are summarized into the vehicle habit of the user after analysis and calculation. The usage habits typically include fixed usage data, such as the user's usage duration, number of vehicle starts and stops, average speed, etc. over a period of time, but can also include data ranges with different priorities, such as the user's one-way usage time, average speed, etc. on different dates or under different climatic conditions, to categorize the user's usage habits under different conditions.
Step S1 is typically performed at the beginning of a vehicle journey, that is, immediately after the user starts starting the vehicle and starts navigation. The duration of the upcoming travel of the user can then be predicted from the user's habit data and the vehicle navigation data. It should be appreciated that in existing vehicle navigation systems, the duration of the trip is easily predicted by the network, but is predicted based on routes learned from the network, road conditions, and constant vehicle speed, without taking into account the user's habit. By means of the vehicle navigation data and referring to the user's habit, the duration of the upcoming journey of the user can be predicted more accurately. It should be appreciated that if the user does not initiate navigation, the prediction may also be based solely on the user's habit.
The battery state in step S1 includes the current, SOC, internal resistance, and temperature of the battery. That is, in step S1, in addition to predicting the duration of the stroke to be performed, the relationship of the current, SOC, internal resistance, and temperature of the battery with time is also predicted, so that the energy consumed by the battery at different temperatures is calculated in the following steps, and the battery state is better monitored, ensuring safe operation of the battery.
In one embodiment according to the invention, in step S1 the following steps are also included:
and judging whether the duration is smaller than a preset time threshold, if so, not executing the steps after the step S1, and if not, executing the step S2.
The above steps are to prevent that the thermal management system is still on during a short duration trip, so that only the thermal management system on consumes more energy than is saved by battery thermal management during this trip. It is therefore provided in step S1 that the thermal management system is not activated for the entire journey, i.e. that steps following S1 are not performed, in order to save energy, when the duration of the upcoming journey is predicted to be short. The time threshold is preset in the thermal management system in advance, for example, 5 to 10 minutes.
In step S2, the current battery temperature T is first detected by the battery temperature sensor, and the duration of the upcoming travel predicted in step S1 is then determined based on the durationCalculating the change relation of the battery current, the SOC, the internal resistance and the temperature along with time in the time to calculate the energy consumed by the battery from the current battery temperature T to the completion of the travel to be W 1 . It is emphasized that the energy W 1 Not the energy consumed by the battery to complete the entire journey at a constant battery temperature T, but the energy eventually consumed to begin and complete the journey at a battery temperature T, during which the battery temperature will vary correspondingly due to continued operation of the battery, which is taken into account by prediction in the calculation, the energy W 2 Also with energy W 1 And the same is true.
In step S3, the target battery temperature T is first set 0 . In one embodiment of the present invention, the target battery temperature T is set 0 A determination is made as to whether the battery should be cooled or heated. Before such determination, it is necessary to measure the ambient temperature of the battery, in the present invention, the ambient temperature of the battery is measured by a temperature sensor disposed near the battery system, and it is determined whether the battery should be cooled or heated as a whole in consideration of the operating power and internal resistance of the battery, and if the battery should be cooled, the set target battery temperature T 0 Should be less than the current battery temperature T, if the battery should be heated, a target battery temperature T is set 0 Should be greater than the current battery temperature T. By such advance determination, the target battery temperature T can be reduced 0 To reduce the algorithm to more quickly find the optimal target battery temperature.
Further, the target battery temperature T 0 Although different from the current battery temperature T, it should be within a reasonable range with respect to the current battery temperature T, not too high or too low. Because the battery is heated and cooled too much, the energy consumed by the thermal management system is increased more, and the effect of saving energy through thermal management of the battery may be reduced. Thus in one embodiment of the invention, the target battery temperature T 0 Is set within a range of delta T above and below the current battery temperature T, delta T being a constant temperature value preset in the battery thermal management systemThat is, when the battery needs to be cooled, the target battery temperature T is set 0 Setting a target battery temperature T when the battery needs to be heated 0 T+DeltaT is less than or equal to. The preset constant temperature value Δt is, for example, 5 ℃ to 10 ℃, and is generally an integer number. In the case of extreme environments with a large change in climate or air temperature or in the case of mild environments with a small change in climate or air temperature, Δt can also be set to other larger or smaller values. The ΔT is set to further reduce the target battery temperature T 0 And the efficiency of the algorithm is improved.
In one embodiment of the present invention, a plurality of target battery temperatures T are set in step S3 0 So as to obtain the optimal target battery temperature, thereby achieving better battery thermal management effect. Multiple target battery temperatures T 0 For example, in the range of T- Δt to t+Δt with the same temperature difference s. That is, in one embodiment of the present invention, when the battery needs cooling, a plurality of target battery temperatures T 0 In order to form an arithmetic progression from T-DeltaT to T with s as the difference, when the battery needs to be heated, a plurality of target battery temperatures T 0 Is an arithmetic series of differences from T to T+DeltaT, with s as the difference. Of course, T should be excluded from the above-described arithmetic progression 0 Case of =t. Where s is a preset constant temperature value, s being for example 0.5 ℃ or 1 ℃, s can of course also be set to other values, depending on the control accuracy to be achieved. By setting a plurality of target battery temperatures T 0 Can be further and more accurately obtained from the target battery temperature T 0 Screening out the optimal target battery temperature T from the possible range of the battery 0 。
After a plurality of target battery temperatures T are set 0 Thereafter, for each target battery temperature T 0 Calculating the battery temperature T at the target battery temperature according to the prediction of step S1 0 The energy W consumed from starting the operation until completing the stroke 2 And adjusting the current battery temperature T to the target battery temperature T 0 Energy W to be consumed 3 And find the energy W 2 And energy W 3 Sum is W 4 . Here, W is 4 Not only include to batteryAt a target battery temperature T 0 The energy W consumed from starting the operation until completing the stroke 2 And also includes the energy W to be consumed for heat management of the battery, i.e. regulation of the battery temperature 3 This energy is the energy consumption required for heat generation and heat dissipation of the battery itself, which cannot be ignored, because a certain amount of energy is consumed for rapid heating and cooling of the battery, and if this consumption is not taken into consideration, only the energy consumed by the battery after changing to the target battery temperature is considered, it is possible that the consumed energy is increased instead after performing the thermal management of the battery, so that the effect of saving energy consumption is affected.
In step S3, the target battery temperature T for each of the cells is calculated 0 Energy W of (2) 4 Thereafter, for all energy W 4 Comparing and selecting the minimum energy W 4 For step S 4 Is a comparison of (a) and (b).
In step S4, the minimum energy W selected in step S3 is set 4 And energy W 1 Comparing if the energy W 4 Less than energy W 1 Then the corresponding target battery temperature T is proved 0 Less energy is consumed than the current battery temperature T, and step S5 is performed to adjust the current battery temperature T to the target battery temperature T 0 And at the target battery temperature T 0 Starting the travel if energy W 4 Greater than or equal to energy W 1 Then the current battery temperature T is proved to be better than the target battery temperature T 0 The trip is started directly at the current battery temperature T without any operation, i.e. without starting battery thermal management.
Step S6 is mainly directed to the case where a large change in climate or temperature occurs during the running of the vehicle. As described above, steps S1 to S5 are generally performed at the time of vehicle start, that is, at the time of vehicle start of its journey, the target battery temperature T 0 Has been determined and the battery is also adjusted to the appropriate battery temperature. However, when the vehicle travels too long or for too long, the climate or temperature of the surrounding environment of the vehicle may change greatly, which mayThe operating state of the battery is greatly affected. In this case, if the battery is not thermally managed again, it is possible to affect the operating state of the battery and increase the power consumption. Therefore, in one embodiment of the present invention, in step S6, the current ambient temperature of the vehicle is obtained in real time through the vehicle temperature sensor during the journey, the temperature difference between the current ambient temperature of the vehicle and the ambient temperature of the vehicle at the beginning of the journey is obtained, it is determined whether the absolute value of the temperature difference is greater than the temperature threshold preset in the battery thermal management system, if yes, it is proved that the temperature change is excessive at this time, the temperature adjustment of the battery is required again, and step S1 is executed again at this time. If not, no action is required. The temperature threshold is a constant temperature value, for example 5 ℃ to 10 ℃.
Another aspect of the present invention is also directed to a battery thermal management system for performing the above-described battery thermal management control method, referring to fig. 2, which illustrates a schematic structure of the battery thermal management system according to an embodiment of the present invention, wherein all of the components are schematically shown in the form of structural modules for clarity and conciseness since the specific shapes and connection manners of the respective components are not the subject of the present invention, and a person skilled in the art can select appropriate module shapes and connection manners, etc. by himself or herself in the light of the schematic structure. Furthermore, the given block diagram is an example of an embodiment of the present invention, and various modifications can be made by those skilled in the art without departing from the spirit of the present invention, and these modifications are also within the scope of the present invention.
The battery thermal management system is mainly used for controlling the battery temperature on the premise of accurately measuring and monitoring the battery temperature, so that the battery pack can effectively dissipate heat when the temperature is too high, and can be rapidly heated under the low-temperature condition, so that the uniform distribution of the battery pack temperature field and the adaptation with other heat dissipation units are ensured.
The battery thermal management system of the present invention includes an input module 100, a prediction module 200, a calculation module 300, and an output module 400.
The input module 100 is connected with the cloud end through a network and is in communication connection with the battery system, vehicle habit data and vehicle navigation data of a user can be downloaded from the cloud end through the network, the current battery state is obtained from the battery system, and the user can be connected with the input module 100 through mobile terminal equipment such as a mobile phone and the like, so that the vehicle habit data is modified and the battery state is monitored;
the prediction module 200 predicts the duration of the journey that the user is about to take and the battery state in the duration according to the habit data and the navigation data of the vehicle of the user provided by the input module 100 and transmits these information to the calculation module 300;
the calculation module 300 calculates the energy consumed by the battery to start operating at the current battery temperature and complete the trip, the energy consumed by the battery to start operating at the target battery temperature and complete the trip, and the energy consumed to adjust the battery from the current battery temperature to the target battery temperature according to the information transmitted from the prediction module 200 and compares them accordingly according to steps S3 and S4 of the above-described method, and then transmits the comparison result to the output module 400;
the output module 400 outputs a corresponding control command to the execution unit of the battery thermal management system according to the output result from the calculation module 300 to make the execution unit perform a corresponding operation, i.e., control the execution unit to heat or cool the battery.
It should be understood that, since the present invention mainly relates to a battery thermal management control method, not all the execution units in a battery thermal management system and the operation manner thereof are described in detail, but those skilled in the art can certainly realize the battery thermal management control method of the present invention according to the execution units of the existing battery thermal management system and the disclosure of the present invention.
It should be appreciated that the battery thermal management system of the present invention may be installed on a variety of vehicles, including cars, vans, buses, hybrid vehicles, electric vehicles, and the like. The subject of the invention is therefore also directed to protecting various vehicles equipped with the battery thermal management system of the invention.
It should be understood that all of the above preferred embodiments are exemplary and not limiting, and that various modifications or variations of the above-described specific embodiments, which are within the spirit of the invention, should be made by those skilled in the art within the legal scope of the invention.

Claims (10)

1. A battery thermal management control method, comprising the steps of:
s1: acquiring habit data and vehicle navigation data of a user, and predicting the duration of an upcoming trip and the battery state in the duration according to the habit data and the vehicle navigation data;
s2: acquiring the current battery temperature T, and calculating the energy W to be consumed by the battery from the current battery temperature T until the travel is completed according to the prediction in the step S1 1 ；
S3: setting a target battery temperature T 0 Calculating the battery to the target battery temperature T according to the prediction in step S1 0 The energy W to be consumed until the stroke is completed 2 And adjusting the current battery temperature T to the target battery temperature T 0 Energy W to be consumed 3 And find the energy W 2 And energy W 3 The sum is the energy W 4 ；
S4: determining the energy W 4 Whether or not to be smaller than the energy W 1 If yes, executing step S5, if no, not performing any operation;
s5: adjusting the current battery temperature T to the energy W 4 Corresponding target battery temperature T 0 。
2. The battery thermal management control method according to claim 1, wherein step S1 further includes the steps of:
and judging whether the duration is smaller than a preset time threshold, if so, not executing the steps after the step S1, and if not, executing the step S2.
3. The battery thermal management control method according to claim 2, wherein the time threshold is 5 minutes to 10 minutes.
4. The battery thermal management control method according to claim 1, wherein the battery state includes a current, an SOC, an internal resistance, and a temperature of the battery.
5. The battery thermal management control method according to claim 1, wherein in step S3, a plurality of target battery temperatures T are set 0 For each target battery temperature T 0 The corresponding energy W is calculated 4 And calculating the minimum energy W from the calculated energy 4 For combining with energy W in step S4 1 A comparison is made to determine whether to adjust the current battery temperature to correspond to the minimum energy W 4 Is set, the target battery temperature of (a) is set.
6. The battery thermal management control method according to claim 5, wherein step S3 further comprises the steps of:
judging whether the battery needs to be cooled or heated according to the ambient temperature of the battery, and if the battery needs to be cooled, determining the target battery temperature T 0 Is set to be smaller than the current battery temperature T, and if heating is required, the target battery temperature T is set to be smaller than the current battery temperature T 0 Is set to be greater than the current battery temperature T.
7. The battery thermal management control method according to claim 6, wherein in step S3, when the battery needs cooling, a target battery temperature T is set 0 Setting a target battery temperature T when the battery needs to be heated to be more than or equal to T-delta T 0 And less than or equal to T+DeltaT, wherein DeltaT is a preset constant temperature value.
8. The battery thermal management control method according to claim 7, wherein Δt is 5 ℃ to 10 ℃ and the value of Δt is an integer.
9. The method according to claim 8The battery thermal management control method is characterized in that when the battery needs to be cooled, the plurality of target battery temperatures T 0 For an arithmetic progression from T-DeltaT to T with s as the difference, the plurality of target battery temperatures T when the battery needs to be heated 0 An arithmetic series of differences from T to T+DeltaT with s as the difference, where s is a predetermined temperature value.
10. The battery thermal management control method according to claim 9, wherein s is 0.5 ℃ or 1 ℃.
CN202210288967.9A 2022-03-23 2022-03-23 Battery thermal management control method, battery thermal management system and vehicle Pending CN116845431A (en)

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CN202210288967.9A CN116845431A (en) 2022-03-23 2022-03-23 Battery thermal management control method, battery thermal management system and vehicle

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Application Number Priority Date Filing Date Title
CN202210288967.9A CN116845431A (en) 2022-03-23 2022-03-23 Battery thermal management control method, battery thermal management system and vehicle

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