CN113555620A - Control method, control device, battery control system, and storage medium - Google Patents

Control method, control device, battery control system, and storage medium Download PDF

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Publication number
CN113555620A
CN113555620A CN202110776585.6A CN202110776585A CN113555620A CN 113555620 A CN113555620 A CN 113555620A CN 202110776585 A CN202110776585 A CN 202110776585A CN 113555620 A CN113555620 A CN 113555620A
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China
Prior art keywords
temperature
medium
absolute value
flow
flow channel
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Pending
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CN202110776585.6A
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Chinese (zh)
Inventor
王志强
张国炜
林艺垚
汪志超
刘安龙
韩海滨
徐鹏
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Guangzhou Zhipeng Manufacturing Co ltd
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Guangzhou Zhipeng Manufacturing Co ltd
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Priority to CN202110776585.6A priority Critical patent/CN113555620A/en
Publication of CN113555620A publication Critical patent/CN113555620A/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
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The application discloses a control method, a control device, a battery control system and a storage medium. The control method is used for the battery pack. The control method comprises the following steps: acquiring the temperature of the middle part of a battery core of a battery pack and taking the temperature as a first temperature; acquiring the temperature of the edge part of the battery cell and taking the temperature as a second temperature; the absolute value of the difference between the first temperature and the second temperature is a first absolute value, and when the first absolute value is larger than a threshold value, the operation state of a temperature regulation plate of the battery pack is controlled so that the first absolute value is reduced to be lower than the threshold value, and the battery cell is arranged on the temperature regulation plate. Therefore, the first temperature and the second temperature are obtained to carry out difference value calculation, and the first insulation value is controlled to be reduced to be lower than the threshold value under the condition that the first insulation value is larger than the threshold value, so that the temperature difference is reduced, and the consistency of the battery pack is guaranteed. Avoid causing the difference in temperature because of the nonconformity of each part electric core temperature in the battery package for the charge-discharge efficiency of battery package reduces and reduces the life of battery package.

Description

Control method, control device, battery control system, and storage medium
Technical Field
The present disclosure relates to the field of battery pack technologies, and in particular, to a control method, a control device, a battery control system, and a storage medium.
Background
In the existing new energy automobile, a battery pack is used as a main power source of the new energy automobile to provide energy output for the new energy automobile. The working condition of the battery pack changes along with the factors such as the use area and time of the new energy automobile. The temperature of the battery pack affects the service life and the discharge power of the battery pack. If the temperatures of the respective portions of the battery pack are different, both the life and the discharge power of the battery pack tend to be reduced.
Disclosure of Invention
The embodiment of the application provides a control method for a battery pack. The control method comprises the following steps:
acquiring the temperature of the middle part of the battery core of the battery pack and taking the temperature as a first temperature;
acquiring the temperature of the edge part of the battery cell and taking the temperature as a second temperature, wherein the absolute value of the difference value between the first temperature and the second temperature is a first absolute value;
and under the condition that the first insulation value is larger than a threshold value, controlling the running state of a temperature regulation plate of the battery pack so as to reduce the first insulation value to be lower than the threshold value, wherein the battery cell is arranged on the temperature regulation plate.
In the control method, the first temperature and the second temperature are obtained and difference value calculation is carried out, and under the condition that the first insulation value is larger than the threshold value, the first insulation value is controlled to be reduced to the position below the threshold value through the temperature adjusting plate, so that the temperature difference is reduced, and the consistency of the battery pack is guaranteed. Avoid causing the difference in temperature great because of the nonconformity of each part electric core temperature in the battery package for the charge-discharge efficiency of battery package reduces and reduces the life of battery package.
In some embodiments, the temperature adjustment plate has a first flow channel and a second flow channel, the first flow channel and the second flow channel are independently disposed, the first flow channel is disposed corresponding to a middle portion of the battery cell, the second flow channel is disposed corresponding to an edge portion of the battery cell, and the controlling the operation state of the temperature adjustment plate of the battery pack so that the first insulation value is reduced includes:
controlling a state of a first medium in the first flow channel and/or a state of a second medium in the second flow channel to reduce the first absolute value below the threshold.
In some embodiments, said controlling the state of the medium in the first flow channel and/or the state of the medium in the second flow channel to reduce the first absolute value below the threshold value in case the first temperature is greater than the second temperature and the current temperatures of the first medium and the second medium are the same comprises:
controlling the flow rate of the first flow passage to be smaller than that of the second flow passage under the condition that the current temperature of the first medium is higher than the first temperature; or
Controlling the flow rate of the first flow passage to be larger than that of the second flow passage under the condition that the current temperature of the first medium is lower than the second temperature; or
And controlling the flow rate of the first flow channel and the flow rate of the second flow channel to be the same and be greater than a preset flow rate under the condition that the current temperature of the first medium is greater than the second temperature and is less than the first temperature.
In some embodiments, the absolute value of the difference between the first temperature and the current temperature of the first medium is a second absolute value, the absolute value of the difference between the second temperature and the current temperature of the second medium is a third absolute value,
the controlling the state of the medium in the first flow channel and/or the state of the medium in the second flow channel to reduce the first absolute value to below the threshold value comprises:
under the condition that the first temperature is higher than the second temperature and the flow rates of the first flow passage and the second flow passage are the same,
controlling the second absolute value to be smaller than the third absolute value and the current temperature of the second medium to be greater than the second temperature; or
Controlling the second absolute value to be greater than the third absolute value, the current temperature of the first medium to be less than the first temperature and the current temperature of the second medium to be less than the second temperature;
in some embodiments, said controlling the state of the medium in the first flow channel and/or the state of the medium in the second flow channel to reduce the first absolute value below the threshold value in case the first temperature is less than the second temperature and the current temperatures of the first medium and the second medium are the same comprises:
controlling the flow rate of the first flow passage to be smaller than that of the second flow passage under the condition that the current temperature of the first medium is lower than the first temperature; or
Controlling the flow rate of the first flow passage to be greater than that of the second flow passage when the current temperature of the first medium is greater than the second temperature; or
And controlling the flow rate of the first flow channel and the flow rate of the second flow channel to be the same and be greater than a preset flow rate under the condition that the current temperature of the first medium is greater than the first temperature and less than the second temperature.
In some embodiments, the absolute value of the difference between the first temperature and the current temperature of the first medium is a second absolute value, the absolute value of the difference between the second temperature and the current temperature of the second medium is a third absolute value,
the controlling the state of the medium in the first flow channel and/or the state of the medium in the second flow channel to reduce the absolute value below the threshold value comprises:
under the condition that the first temperature is lower than the second temperature and the flow rates of the first flow passage and the second flow passage are the same,
controlling the second absolute value to be smaller than the third absolute value and the current temperature of the second medium to be smaller than the second temperature; or
Controlling the second absolute value to be greater than the third absolute value, the current temperature of the first medium to be greater than the first temperature and the current temperature of the second medium to be greater than the second temperature;
in some embodiments, the first flow passage and the second flow passage are each connected to a flow control valve, the control method further comprising:
and controlling the opening degree of the flow control valve to control the flow of the first flow passage and the flow of the second flow passage.
An embodiment of the present application provides a control device, including:
the first acquisition module is used for acquiring the temperature of the middle part of the battery cell of the battery pack and taking the temperature as a first temperature;
the second acquisition module is used for acquiring the temperature of the edge part of the battery cell and taking the temperature as a second temperature, and the absolute value of the difference value between the first temperature and the second temperature is a first absolute value;
and the control module is used for controlling the running state of a temperature adjusting plate of the battery pack to enable the absolute value to be reduced to be lower than the threshold value under the condition that the first absolute value is larger than the threshold value, and the battery cell is arranged on the temperature adjusting plate.
The embodiment of the application provides a battery control system, which comprises a battery pack and a control assembly. The battery pack comprises a temperature adjusting plate and a battery core, and the battery core is arranged on the temperature adjusting plate. The control assembly is connected with the temperature adjusting plate. The control assembly is used for realizing the control method of any one of the above items.
The present embodiments provide a non-transitory computer-readable storage medium of a computer-executable program, which when executed by one or more processors, implements the control method.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a control method according to an embodiment of the present application;
FIG. 2 is a block schematic diagram of a control device according to an embodiment of the present application;
FIG. 3 is a schematic plan view of a battery control system according to an embodiment of the present application;
fig. 4 is another flowchart illustrating a control method according to an embodiment of the present application;
FIG. 5 is another schematic flow chart of a control method according to an embodiment of the present application
FIG. 6 is a schematic flow chart of a control method according to an embodiment of the present application;
FIG. 7 is a schematic flow chart diagram of a control method according to an embodiment of the present application;
fig. 8 is still another flowchart illustrating a control method according to an embodiment of the present application;
fig. 9 is another flowchart illustrating a control method according to an embodiment of the present application.
Description of the main element symbols:
the battery control system 10, the battery pack 11, the temperature regulation plate 111, the first flow channel 1111, the second flow channel 1112, the battery cell 112, the inlet 113, the outlet 114, the control assembly 12, the flow control valve, the control device 20, the first obtaining module 21, the second obtaining module 22, and the control module 23.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1, the present embodiment provides a control method for a battery pack 11. The control method comprises the following steps:
s10: acquiring the temperature of the middle part of the battery core 112 of the battery pack 11 as a first temperature TI;
s20: acquiring the temperature of the edge part of the battery cell 112 and taking the temperature as a second temperature T2, wherein the absolute value of the difference between the first temperature TI and the second temperature T2 is a first absolute value T12;
s30: in the case where the first insulation value T12 is greater than the threshold value, the operating state of the temperature adjustment plate 111 of the battery pack 11 is controlled so that the first insulation value T12 is reduced below the threshold value, and the battery cells 112 are disposed on the temperature adjustment plate 111.
In this way, the first temperature TI and the second temperature T2 are obtained, the difference value is calculated, and when the first insulation value T12 is greater than the threshold value, the temperature adjustment plate 111 controls the first insulation value T12 to be reduced to be less than the threshold value, so that the consistency of the battery pack 11 is ensured. The temperature difference caused by the inconsistency of the temperatures of the electric cores 112 of all the parts in the battery pack 11 is avoided, so that the charging and discharging efficiency of the battery pack 11 is reduced, and the service life of the battery pack 11 is shortened.
Referring to fig. 2, the present embodiment provides a control apparatus 20, and the control apparatus 20 includes a first obtaining module 21, a second obtaining module 22, and a control module 23. The first obtaining module 21 is configured to obtain a temperature of a middle portion of the battery cell 112 of the battery pack 11 and use the temperature as a first temperature TI; the second obtaining module 22 is configured to obtain the temperature of the edge of the battery cell 112 and use the temperature as a second temperature T2, where an absolute value of a difference between the first temperature TI and the second temperature T2 is a first absolute value T12; the control module 23 is configured to control an operation state of the temperature adjustment plate 111 of the battery pack 11 so that the absolute value is reduced below a threshold value when the first absolute value T12 is greater than the threshold value, and the battery cell 112 is disposed on the temperature adjustment plate 111.
Referring to fig. 3, the present embodiment provides a battery control system 10, and the battery control system 10 includes a battery pack 11 and a control assembly 12. The battery pack 11 includes a temperature adjustment plate 111 and a battery cell 112, and the battery cell 112 is disposed on the temperature adjustment plate 111. The control assembly 12 is connected to a temperature adjustment plate 111. The control assembly 12 is configured to obtain a temperature of a middle portion of the battery cells 112 of the battery pack 11 as the first temperature TI, obtain a temperature of an edge portion of the battery cells 112 as the second temperature T2, and control an operation state of the temperature adjustment plate 111 of the battery pack 11 so that the first insulation value T12 is reduced below a threshold value in a case where the first insulation value T12 is greater than the threshold value, where the battery cells 112 are disposed on the temperature adjustment plate 111.
Specifically, the battery control system 10 may be used for a vehicle to power the vehicle, and the vehicle may be a hybrid vehicle or an electric vehicle, and is not limited in particular. The battery core 112 may be a lead-acid battery, a nickel-metal hydride battery, a lithium battery, or the like. Preferably, the battery core 112 is mostly made of a lithium battery, because the lithium battery has the advantages of light weight, multiple charging and discharging cycles, strong high-temperature applicability, environmental friendliness, and the like. The battery cell 112 may have a rectangular parallelepiped shape or a cylindrical shape, and the shape of the battery cell 112 is not limited herein.
The temperature adjusting plate 111 may be provided with a flow channel, and a cooling medium is introduced to heat or cool the electric core 112. The temperature adjustment plate 111 may be made of a metal material or a non-metal material having a good thermal conductivity, and the specific material is not limited. For example, the temperature adjustment plate 111 may be formed by pressing an aluminum material. The temperature adjustment plate 111 and the battery cell 112 may be integrally disposed, so that the temperature adjustment plate 111 can better heat or cool the battery cell 112. The heating or cooling of the battery cell 112 can also be completed by independently arranging the temperature adjusting plate 111, in this case, when the temperature adjusting plate 111 or the battery cell 112 is damaged, the replacement is convenient, and the maintenance cost is reduced.
After the electric core 112 works for a period of time, the phenomenon of heating and scalding can occur, and the long-time and high-temperature heating can lead to the reduction of the charging efficiency of the electric core 112, so that the electric core 112 needs to be cooled and radiated by the temperature regulating plate 111. When the external temperature is too low, in order to avoid the influence of the external temperature on the battery cell 112, the battery cell 112 may be heated and insulated by the temperature adjusting plate 111. When the external temperature is too high, the temperature adjusting plate 111 can also be used for cooling and insulating the battery cell 112.
Furthermore, when the battery cell 112 is heated or cooled, the heating or cooling of the edge position and the center position of the battery cell 112 may be uneven, which may cause inconsistency of temperature difference of the battery cell 112. In such a case, when the battery pack 11 is discharged, the voltage of the battery cells 112 in the low-temperature portion reaches the discharge cutoff voltage, and the entire battery pack 11 stops discharging, which may result in a decrease in the discharge amount of the battery pack 11 and a decrease in the available discharge efficiency; when the battery pack 11 is charged, the voltage of the battery cells 112 in the low-temperature portion reaches the charge cut-off voltage, and the entire battery pack 11 stops discharging, which may result in a decrease in the charge amount of the battery pack 11 and an insufficient cruising ability. Therefore, the temperature of the middle part of the battery cell 112 and the temperature of the edge part of the battery cell 112 can be monitored in real time, and the middle part of the battery cell 112 and the edge part of the battery cell 112 are respectively heated or cooled according to the difference value between the two, so that the difference value is controlled within the threshold value to ensure the consistency of the battery pack 11. The heating or cooling can be specifically controlled by the control assembly 12.
More specifically, in step S10, the temperature of the middle portion of the battery cell 112 of the battery pack 11 is obtained to monitor the temperature of the middle portion of the battery cell 112, a first temperature TI sensor may be disposed at the middle portion of the battery cell 112, the first temperature TI sensor is connected to the control component 12, and the control component 12 may receive a feedback signal of the first temperature TI sensor, that is, the first temperature TI, and control the temperature adjustment plate 111. In this way, the temperature of the middle portion of the battery cell 112 can be monitored, so that the temperature adjustment plate 111 can independently heat or cool the middle portion of the battery cell 112. It will be appreciated that the monitoring may be in real time or may be acquired at intervals to conserve power.
In step S20, the temperature of the edge portion of the battery cell 112 of the battery pack 11 is obtained to monitor the temperature of the edge portion of the battery cell 112, a second temperature T2 sensor may be disposed at the edge portion of the battery cell 112, the second temperature T2 sensor is connected to the control module 12, and the control module 12 may receive a feedback signal of the second temperature T2 sensor, that is, the second temperature T2, and control the temperature adjustment plate 111. In this way, the temperature of the edge portion of the battery cell 112 can be monitored, so that the temperature adjusting plate 111 is controlled to independently heat or cool the edge portion of the battery cell 112.
In step S30, after the temperature of the middle portion of the battery cell 112, that is, the first temperature TI, and the temperature of the edge portion of the battery cell 112, that is, the second temperature T2 are obtained in the previous steps, a difference between the first temperature TI and the second temperature T2 is calculated, and an absolute value is taken as a first absolute value T12. When the first absolute value T12 is smaller than the threshold, the temperature difference between the middle portion and the edge portion of the battery cell 112 is small, and the influence of the charging and discharging process on the battery pack 11 is small. When the first absolute value T12 is greater than the threshold, which may affect the operating efficiency and the service life of the battery pack 11, the first absolute value T12 needs to be controlled to decrease until the first absolute value T12 is less than the threshold. Specifically, the edge portion and the middle portion of the battery cell 112 may be individually heated or cooled by the temperature adjustment plate 111, respectively, so that the first insulation value T12 is smaller than the threshold value.
As such, the operating state of the temperature adjustment plate 111 may be controlled according to the relative magnitude between the first absolute value T12 and the threshold value such that the first absolute value T12 is maintained within a range less than the threshold value.
Referring to fig. 3 and 4, in some embodiments, the temperature adjustment plate 111 has a first flow channel 1111 and a second flow channel 1112, the first flow channel 1111 and the second flow channel 1112 are independently disposed, the first flow channel 1111 is disposed corresponding to a middle portion of the battery cell 112, the second flow channel 1112 is disposed corresponding to an edge portion of the battery cell 112, and the operation state of the temperature adjustment plate 111 of the battery pack 11 is controlled to decrease the first insulation value T12 (step S30), including:
s40: in the case where the first absolute value T12 is greater than the threshold, the state of the first medium in the first channel 1111 and/or the state of the second medium in the second channel 1112 are controlled to reduce the first absolute value T12 below the threshold.
In some embodiments, the control module 23 is configured to control the state of the first media in the first channel 1111 and/or the state of the second media in the second channel 1112 to decrease the first absolute value T12 below a threshold if the first absolute value T12 is greater than the threshold.
In certain embodiments, the control assembly 12 is configured to control the state of the first media in the first flow path 1111 and/or the state of the second media in the second flow path 1112 to decrease the first absolute value T12 below a threshold if the first absolute value T12 is greater than the threshold.
Specifically, the first flow channel 1111 and the second flow channel 1112 are used for circulating a cooling medium, so that the flowing cooling medium can be heated or cooled more than the battery cells 112. The cooling medium may be a liquid medium or a gas medium, and the present embodiment is not limited thereto. For example, in one example, the cooling medium may be water. It is understood that the first medium in the first channel 1111 and the second medium in the second channel 1112 may be the same medium or different media. Here, the number of the first flow channel 1111 and the second flow channel 1112 may be plural.
The temperature adjusting plate 111 is provided with at least two inlets 113 and outlets 114, the number of the outlets 114 and the inlets 113 is at least two, the inlets 113 and the outlets 114 are in one-to-one correspondence to form a group, and the inlets 113 and the outlets 114 are arranged at intervals. At least one set of the inlet 113 and the outlet 114 communicates with the first flow channel 1111, and at least one set of the inlet 113 and the outlet 114 communicates with the second flow channel 1112. The inlet 113 and the outlet 114 are provided to facilitate the injection and outflow of the cooling medium.
The difference in the first medium flow rate or the temperature changes the temperature of the middle portion of the battery cell 112, and similarly, the difference in the second medium flow rate or the temperature also changes the temperature of the edge portion of the battery cell 112.
More specifically, in step S40, the state of the first medium in the first channel 1111 and/or the state of the second medium in the second channel 1112 may be controlled to decrease the first absolute value T12 below the threshold. Thus, the change of the state of the first medium and/or the second medium can be accomplished by controlling the flow rate or the temperature of the first medium and/or the second medium, etc. For example, when the first temperature TI is greater than the second temperature T2, the flow rate of the second medium in the second flow channel 1112 is controlled to be zero and the current temperature T3 of the first medium is controlled to be less than the first temperature TI, so that the first medium cools the middle portion of the battery cell 112 to reduce the first temperature TI, thereby reducing the first absolute value T12 below the threshold value. When the first temperature TI is lower than the second temperature T2, the flow rate of the first flow channel 1111 is controlled to be zero, and the current temperature T3 of the first medium is controlled to be higher than the first temperature TI, so that the first medium heats the middle portion of the battery cell 112 to increase the first temperature TI, and the first absolute value T12 is reduced to be lower than the threshold value.
Referring to fig. 3 and 5, in some embodiments, the first flow channel 1111 and the second flow channel 1112 are both connected to the flow control valve 13, and the control method further includes:
s41: the flow rate of the first flow passage 1111 and the flow rate of the second flow passage 1112 are controlled by controlling the opening degree of the flow control valve 13.
In some embodiments, the control module 23 is configured to control the flow rate of the first flow channel 1111 and the flow rate of the second flow channel 1112 by controlling the opening degree of the flow control valve 13.
In some embodiments, the control assembly 12 is used to control the flow of the first flow channel 1111 and the flow of the second flow channel 1112 by controlling the opening of the flow control valve 13.
Specifically, the flow control valve 13 is connected to the control assembly 12 and the temperature adjustment plate 111, and the flow control valve 13 has a plurality of valve ports connected to inlets 113 of the first flow channel 1111 and the second flow channel 1112. The control module 12 can adjust the flow rates of the first medium and the second medium flowing into the first channel 1111 and the second channel 1112 through the flow control valve 13 by the opening degree of the different valve ports of the flow control valve 13. The larger the opening degree of the valve port is, the larger the flow rate of the first medium in the first channel 1111 or the second medium in the second channel 1112 is; the smaller the opening degree of the valve port is, the smaller the flow rate of the first medium in the first flow channel 1111 or the second medium in the second flow channel 1112 is; when the valve port is closed, no media flows through the first channel 1111/the second channel 1112. In this way, the flow rate of the first medium and/or the second medium can be controlled by the opening degree of the valve port of the flow control valve 13.
Referring to FIG. 6, in some embodiments, controlling the media state in the first channel 1111 and/or the media state of the second channel 1112 to decrease the first absolute value T12 below a threshold (step S40) includes:
s42: in the case where the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the first temperature TI, controlling the flow rate of the first flow channel 1111 to be smaller than the flow rate of the second flow channel 1112;
s43: in the case where the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is less than the second temperature T2, controlling the flow rate of the first flow channel 1111 to be greater than the flow rate of the second flow channel 1112;
s44: in the case where the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the second temperature T2 and less than the first temperature TI, the flow rate of the first flow channel 1111 and the flow rate of the second flow channel 1112 are controlled to be the same and greater than a preset flow rate.
In certain embodiments, the control module 23 is configured to control the flow rate of the first flow channel 1111 to be less than the flow rate of the second flow channel 1112 in case the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the first temperature TI; also for controlling the flow rate of the first flow channel 1111 to be greater than the flow rate of the second flow channel 1112 in case that the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is less than the second temperature T2; and also for controlling the flow rate of the first flow channel 1111 and the flow rate of the second flow channel 1112 to be the same and to be greater than a preset flow rate in the case where the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the second temperature T2 and less than the first temperature TI.
In certain embodiments, the control assembly 12 is configured to control the flow rate of the first flow channel 1111 to be less than the flow rate of the second flow channel 1112 in case the first temperature T1 is greater than the second temperature T2, the current temperatures of the first and second media are the same, and the current temperature T3 of the first medium is greater than the first temperature TI; also for the case where the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is less than the second temperature T2, the flow rate of the first flow channel 1111 is controlled to be greater than the flow rate of the second flow channel 1112; and also for controlling the flow rate of the first flow channel 1111 and the flow rate of the second flow channel 1112 to be the same and to be greater than a preset flow rate in the case where the first temperature T1 is greater than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the second temperature T2 and less than the first temperature TI.
Specifically, a third temperature sensor may be mounted on the first flow channel 1111, and the third temperature sensor may be connected to the control assembly 12. The third temperature sensor may acquire the current temperature T3 of the first medium in the first flow channel 1111. A fourth temperature sensor may be mounted on the second flow path 1112 and coupled to the control assembly 12. The fourth temperature sensor may acquire the current temperature T4 of the second medium in the second flow path 1112.
In step S42, when the first temperature TI is greater than the second temperature T2, and the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, and the current temperature T3 of the first medium is greater than the first temperature TI, the first medium and the second medium heat the middle portion and the edge portion of the battery cell 112, respectively. To reduce the first absolute value T12 below the threshold, the flow rate of the first flow channel 1111 is controlled to be smaller than the flow rate of the second flow channel 1112, i.e. the first temperature TI is controlled to increase at a rate smaller than the rate of increase of the second temperature T2. More specifically, the opening degree of the valve port connected to the first flow passage 1111 may be controlled to be smaller than the opening degree of the valve port connected to the second flow passage 1112 by controlling the flow control valve 13.
In this way, when the first temperature TI is higher than the second temperature T2 and the current temperature T3 of the first medium and the current temperature T4 of the second medium are the same, the middle portion and the edge portion of the cell 112 are heated by the first medium and the second medium, respectively, and the flow rate of the first flow channel 1111 is controlled to be lower than the flow rate of the second flow channel 1112 so that the first absolute value T12 is reduced to the threshold value or less.
In step S43, when the first temperature TI is greater than the second temperature T2, and when the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, and the current temperature T3 of the first medium is less than the second temperature T2, the first medium and the second medium cool the middle portion and the edge portion of the battery cell 112, respectively. To reduce the first absolute value T12 below the threshold, the flow rate of the first flow channel 1111 is controlled to be greater than the flow rate of the second flow channel 1112, i.e. the first temperature TI is controlled to decrease at a rate greater than the rate at which the second temperature T2 decreases. More specifically, the opening degree of the valve port connected to the first flow passage 1111 may be controlled to be larger than the opening degree of the valve port connected to the second flow passage 1112 by controlling the flow control valve 13.
In this way, when the first temperature TI is higher than the second temperature T2 and the current temperature T3 of the first medium and the current temperature T4 of the second medium are the same, the middle portion and the edge portion of the cell 112 are cooled by the first medium and the second medium, respectively, and the flow rate of the first flow channel 1111 is controlled to be higher than the flow rate of the second flow channel 1112 so that the first absolute value T12 is reduced to the threshold value or less.
In step S44, when the first temperature TI is higher than the second temperature T2, and the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, and the current temperature T3 of the first medium is higher than the second temperature T2 and lower than the first temperature TI, the first medium cools the middle portion of the battery cell 112, and the second medium heats the edge portion of the battery cell 112. To reduce the first absolute value T12 below the threshold, the flow rate of the first flow channel 1111 is controlled to be equal to the flow rate of the second flow channel 1112, i.e. the first temperature TI is controlled to decrease at a rate equal to the rate at which the second temperature T2 increases; controlling the flow rate of the first flow passage 1111 to be equal to the flow rate of the second flow passage 1112 and to be greater than the preset flow rate may increase the rate at which the first temperature TI is decreased and increase the rate at which the second temperature T2 is increased. More specifically, the opening degree of the valve port connected to the first flow passage 1111 may be controlled to be equal to the opening degree of the valve port connected to the second flow passage 1112 by controlling the flow control valve 13.
In this way, when the first temperature TI is greater than the second temperature T2 and the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, the first medium is used to cool the middle portion of the battery cell 112, the second medium is used to heat the edge portion of the battery cell 112, and the flow rate of the first flow channel 1111 is controlled to be equal to the flow rate of the second flow channel 1112 and greater than the preset flow rate, so that the first absolute value T12 is reduced to be less than or equal to the threshold value.
Under the condition that the first temperature TI is greater than the second temperature T2 and the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, the user can select to heat or cool the middle part and the edge part of the battery cell 112 according to actual needs, and then control the opening of the valve port of the flow control valve 13, so that the first absolute value T12 is reduced to be below the threshold value, thereby ensuring the consistency of the battery pack 11. For example, when the middle part and the edge part of the battery cell 112 are heated, the flow rate of the first flow channel 1111 needs to be controlled to be smaller than the flow rate of the second flow channel 1112; when the middle part and the edge part of the battery cell 112 are cooled, the flow rate of the first flow channel 1111 needs to be controlled to be larger than that of the second flow channel 1112; when the middle portion of the electric core 112 is cooled and the edge portion of the electric core 112 is heated, the flow rate of the first flow channel 1111 needs to be controlled to be equal to the flow rate of the second flow channel 1112 and to be greater than the preset flow rate.
Referring to fig. 7, in some embodiments, the absolute value of the difference between the first temperature TI and the current temperature T3 of the first medium is a second absolute value T13, the absolute value of the difference between the second temperature T2 and the current temperature T4 of the second medium is a third absolute value T24, and the controlling the state of the medium in the first channel 1111 and/or the state of the medium in the second channel 1112 to decrease the first absolute value T12 below the threshold (step S40) includes:
s45: in the case where the first temperature TI is greater than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, the second absolute value T13 is controlled to be smaller than the third absolute value T24 and the current temperature T4 of the second medium is controlled to be greater than the second temperature T2;
s46: in the case where the first temperature TI is greater than the second temperature T2 and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, the second absolute value T13 is controlled to be greater than the third absolute value T24, the current temperature T3 of the first medium is less than the first temperature TI and the current temperature T4 of the second medium is less than the second temperature T2.
In certain embodiments, the control module 23 is configured to control the second absolute value T13 to be less than the third absolute value T24 and the current temperature T4 of the second medium to be greater than the second temperature T2 in the case where the first temperature TI is greater than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same; and also for controlling the second absolute value T13 to be greater than the third absolute value T24, the current temperature T3 of the first medium to be less than the first temperature TI and the current temperature T4 of the second medium to be less than the second temperature T2 in the case where the first temperature TI is greater than the second temperature T2 and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same.
In certain embodiments, the control assembly 12 is configured to control the second absolute value T13 to be less than the third absolute value T24 and the current temperature T4 of the second medium to be greater than the second temperature T2, in the case where the first temperature TI is greater than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same; and also for controlling the second absolute value T13 to be greater than the third absolute value T24, the current temperature T3 of the first medium to be less than the first temperature TI and the current temperature T4 of the second medium to be less than the second temperature T2 in the case where the first temperature TI is greater than the second temperature T2 and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same.
Specifically, a water pump, a heating device, and a cooling device may be mounted on the battery control system 10. The water pump is used for pressurizing the first medium and the second medium, and ensuring that the first medium and the second medium can circulate in the first flow channel 1111 and the second flow channel 1112.
The heating device may be a ceramic heater, a stainless steel electrical heating tube, or a PTC heating plate, and the first medium and/or the second medium are heated by the heating device, and the heated first medium and the heated second medium circulate through the entire temperature adjustment plate 111 under the action of the first flow channel 1111 and the second flow channel 1112, respectively, so as to heat the battery cell 112.
The refrigeration device can be a compressor, an air-cooled cooler or a semiconductor refrigeration sheet, and the like, the refrigeration device cools the first medium and/or the second medium, and the cooled first medium and the cooled second medium circulate in the whole temperature adjustment plate 111 under the action of the first flow channel 1111 and the second flow channel 1112 respectively, so as to achieve the purpose of cooling the electric core 112.
In step S45, when the first temperature TI is greater than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, the current temperature T4 of the second medium is controlled to be greater than the second temperature T2, so that the second medium can heat the edge portion of the battery cell 112, the second absolute value T13 is controlled to be less than the third absolute value T24, so that the rate of increase/decrease of the first temperature TI is less than the rate of increase of the second temperature T2, and finally the first absolute value T12 can be decreased to be less than the threshold. More specifically, the second medium may be heated by the heating device, so that the current temperature T4 of the second medium is greater than the second temperature T2, thereby heating the edge portion of the battery cell 112, and the first medium may be heated/cooled by the heating device/cooling device, during which the second absolute value T13 is ensured to be less than the third absolute value T24.
In step S46, when the first temperature TI is greater than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, the current temperature T3 of the first medium is controlled to be less than the first temperature TI and the current temperature T4 of the second medium is controlled to be less than the second temperature T2, the first medium and the second medium may cool the middle portion and the edge portion of the battery cell 112, respectively, and the second absolute value T13 is controlled to be greater than the third absolute value T24, so that the rate of decrease of the first temperature TI is greater than the rate of decrease of the second temperature T2, and finally the first absolute value T12 may be decreased below the threshold. More specifically, the first medium and the second medium may be cooled by the refrigeration device, so that the current temperature T3 of the first medium is less than the first temperature TI and the current temperature T4 of the second medium is less than the second temperature T2, thereby cooling the middle portion and the edge portion of the battery cell 112, and in the process, it is required to ensure that the second absolute value T13 is greater than the third absolute value T24.
Referring to FIG. 8, in some embodiments, controlling the media state in the first channel 1111 and/or the media state of the second channel 1112 to decrease the first absolute value T12 below a threshold (step S40) includes:
s52, controlling the flow rate of the first flow channel 1111 to be smaller than the flow rate of the second flow channel 1112 under the condition that the first temperature T1 is smaller than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is smaller than the first temperature TI;
s53: in the case where the first temperature T1 is less than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the second temperature T2, controlling the flow rate of the first flow channel 1111 to be greater than the flow rate of the second flow channel 1112;
s54: in the case where the first temperature T1 is less than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the first temperature TI and less than the second temperature T2, the flow rate of the first flow channel 1111 and the flow rate of the second flow channel 1112 are controlled to be the same and greater than a preset flow rate.
In certain embodiments, the control module 23 is configured to control the flow rate of the first flow channel 1111 to be less than the flow rate of the second flow channel 1112 in case the first temperature T1 is less than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is less than the first temperature TI; also for the case where the first temperature T1 is less than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the second temperature T2, the flow rate of the first flow channel 1111 is controlled to be greater than the flow rate of the second flow channel 1112; and a control unit for controlling the flow rate of the first flow channel 1111 and the flow rate of the second flow channel 1112 to be the same and greater than a preset flow rate in a case where the first temperature T1 is less than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the first temperature TI and less than the second temperature T2.
In certain embodiments, the control assembly 12 is configured to control the flow rate of the first flow channel 1111 to be less than the flow rate of the second flow channel 1112 in case the first temperature T1 is less than the second temperature T2, the current temperatures of the first and second media are the same, and the current temperature T3 of the first medium is less than the first temperature TI; also for controlling the flow rate of the first flow channel 1111 to be greater than the flow rate of the second flow channel 1112 in case that the first temperature T1 is less than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the second temperature T2; and a control unit for controlling the flow rate of the first flow channel 1111 and the flow rate of the second flow channel 1112 to be the same and greater than a preset flow rate in a case where the first temperature T1 is less than the second temperature T2, the current temperatures of the first medium and the second medium are the same, and the current temperature T3 of the first medium is greater than the first temperature TI and less than the second temperature T2.
In step S52, in the case where the first temperature TI is less than the second temperature T2, the current temperature T3 of the first medium may be acquired by the third temperature sensor, and the current temperature T4 of the second medium may be acquired by the fourth temperature sensor. When the current temperature T3 of the first medium and the current temperature T4 of the second medium are the same, and the current temperature T3 of the first medium is less than the first temperature TI, in such a case, the first medium and the second medium cool the middle portion and the edge portion of the battery cell 112, respectively. To reduce the first absolute value T12 below the threshold, the flow rate of the first flow channel 1111 is controlled to be smaller than the flow rate of the second flow channel 1112, i.e. the first temperature TI is controlled to decrease at a rate smaller than the rate of decrease of the second temperature T2. More specifically, the opening degree of the valve port connected to the first flow passage 1111 may be controlled to be smaller than the opening degree of the valve port connected to the second flow passage 1112 by controlling the flow control valve 13.
In this way, when the first temperature TI is lower than the second temperature T2 and the current temperature T3 of the first medium and the current temperature T4 of the second medium are the same, the middle portion and the edge portion of the cell 112 are cooled by the first medium and the second medium, respectively, and the flow rate of the first flow channel 1111 is controlled to be lower than the flow rate of the second flow channel 1112 so that the first absolute value T12 is reduced to the threshold value or less.
In step S53, when the first temperature TI is less than the second temperature T2, and the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, and the current temperature T3 of the first medium is greater than the second temperature T2, the first medium and the second medium heat the middle portion and the edge portion of the battery cell 112, respectively. To reduce the first absolute value T12 below the threshold, the flow rate of the first flow channel 1111 is controlled to be greater than the flow rate of the second flow channel 1112, i.e. the first temperature TI is controlled to increase at a rate greater than the rate at which the second temperature T2 increases. More specifically, the opening degree of the valve port connected to the first flow passage 1111 may be controlled to be larger than the opening degree of the valve port connected to the second flow passage 1112 by controlling the flow control valve 13.
In this way, when the first temperature TI is lower than the second temperature T2 and the current temperature T3 of the first medium and the current temperature T4 of the second medium are the same, the middle portion and the edge portion of the cell 112 are cooled by the first medium and the second medium, respectively, and the flow rate of the first flow channel 1111 is controlled to be higher than the flow rate of the second flow channel 1112 so that the first absolute value T12 is reduced to be equal to or lower than the threshold value.
In step S54, when the first temperature TI is less than the second temperature T2, and the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, and the current temperature T3 of the first medium is greater than the first temperature TI and less than the second temperature T2, in such a case, the first medium heats the middle portion of the battery cell 112, and the second medium cools the edge portion of the battery cell 112. To reduce the first absolute value T12 below the threshold, the flow rate of the first flow channel 1111 is controlled to be equal to the flow rate of the second flow channel 1112, i.e. the first temperature TI is controlled to decrease at a rate equal to the rate at which the second temperature T2 increases; controlling the flow rate of the first flow passage 1111 to be equal to the flow rate of the second flow passage 1112 and to be greater than the preset flow rate may increase the rate at which the first temperature TI is increased and increase the rate at which the second temperature T2 is decreased. More specifically, the opening degree of the valve port connected to the first flow passage 1111 may be controlled to be equal to the opening degree of the valve port connected to the second flow passage 1112 by controlling the flow control valve 13.
In this way, when the first temperature TI is less than the second temperature T2 and the current temperature T3 of the first medium is the same as the current temperature T4 of the second medium, the first medium is used to heat the middle portion of the battery cell 112, the second medium is used to cool the edge portion of the battery cell 112, and the flow rate of the first flow channel 1111 is controlled to be equal to the flow rate of the second flow channel 1112 and greater than the preset flow rate, so that the first absolute value T12 is reduced to be less than or equal to the threshold value.
Under the condition that the first temperature TI is lower than the second temperature T2, and the current temperature T3 of the first medium and the current temperature T4 of the second medium are the same, the user can select to heat or cool the middle part and the edge part of the battery cell 112 according to actual requirements, and then control the opening degree of the valve port of the flow control valve 13, so that the first absolute value T12 is reduced to be below the threshold value, thereby ensuring the consistency of the battery pack 11. For example, when the middle part and the edge part of the battery cell 112 are heated, the flow rate of the first flow channel 1111 needs to be controlled to be greater than the flow rate of the second flow channel 1112; when the middle part and the edge part of the battery cell 112 are cooled, the flow rate of the first flow channel 1111 needs to be controlled to be smaller than the flow rate of the second flow channel 1112; when the middle portion of the battery cell 112 is heated and the edge portion of the battery cell 112 is cooled, the flow rate of the first flow channel 1111 needs to be controlled to be equal to the flow rate of the second flow channel 1112 and to be greater than the preset flow rate.
Referring to fig. 9, in some embodiments, the absolute value of the difference between the first temperature TI and the current temperature T3 of the first medium is a second absolute value T13, the absolute value of the difference between the second temperature T2 and the current temperature T4 of the second medium is a third absolute value T24, and the state of the medium in the first channel 1111 and/or the state of the medium in the second channel 1112 are controlled to decrease the absolute value below a threshold value (step S40), including:
s55: in the case where the first temperature TI is less than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, controlling the second absolute value T13 to be less than the third absolute value T24 and the current temperature T4 of the second medium to be less than the second temperature T2;
s56: in the case where the first temperature TI is less than the second temperature T2 and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, the second absolute value T13 is controlled to be greater than the third absolute value T24, the current temperature T3 of the first medium is greater than the first temperature TI and the current temperature T4 of the second medium is greater than the second temperature T2.
In certain embodiments, the control module 23 is configured to control the second absolute value T13 to be less than the third absolute value T24 and the current temperature T4 of the second medium to be less than the second temperature T2 in case the first temperature TI is less than the second temperature T2 and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same; and is also used for controlling the second absolute value T13 to be greater than the third absolute value T24, the current temperature T3 of the first medium to be greater than the first temperature TI and the current temperature T4 of the second medium to be greater than the second temperature T2 in the case where the first temperature TI is less than the second temperature T2 and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same.
In certain embodiments, the control assembly 12 is configured to control the second absolute value T13 to be less than the third absolute value T24 and the current temperature T4 of the second medium to be less than the second temperature T2 in the case where the first temperature TI is less than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same; and is also used for controlling the second absolute value T13 to be greater than the third absolute value T24, the current temperature T3 of the first medium to be greater than the first temperature TI and the current temperature T4 of the second medium to be greater than the second temperature T2 in the case where the first temperature TI is less than the second temperature T2 and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same.
In step S55, when the first temperature TI is less than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, the current temperature T4 of the second medium is controlled to be less than the second temperature T2, the second medium can cool the edge of the battery cell 112, and the second absolute value T13 is controlled to be less than the third absolute value T24, so that the rate of increasing/decreasing the first temperature TI is less than the rate of decreasing the second temperature T2, and finally the first absolute value T12 can be decreased to be less than the threshold. More specifically, the second medium may be cooled by the refrigeration device, so that the current temperature T4 of the second medium is lower than the second temperature T2, thereby cooling the edge portion of the battery cell 112, and the first medium may be heated/cooled by the heating device/refrigeration device, during which the second absolute value T13 is required to be lower than the third absolute value T24.
In step S56, when the first temperature TI is less than the second temperature T2, and the flow rates of the first flow channel 1111 and the second flow channel 1112 are the same, the current temperature T3 of the first medium is controlled to be greater than the first temperature TI and the current temperature T4 of the second medium is controlled to be greater than the second temperature T2, the first medium and the second medium may heat the middle portion and the edge portion of the cell 112, respectively, and the second absolute value T13 is controlled to be greater than the third absolute value T24, so that the rate of increase of the first temperature TI is greater than the rate of increase of the second temperature T2, and finally the first absolute value T12 may be decreased to be less than the threshold. More specifically, the first medium and the second medium may be heated by the heating device, so that the current temperature T3 of the first medium is greater than the first temperature TI and the current temperature T4 of the second medium is greater than the second temperature T2, thereby heating the middle portion and the edge portion of the battery cell 112, and in the process, it is required to ensure that the second absolute value T13 is greater than the third absolute value T24.
In summary, the temperature of the middle portion of the battery cell 112 can be monitored to obtain the first temperature and the second temperature for difference calculation, and when the first absolute value is greater than the threshold value, the middle portion and the edge portion of the battery cell 112 are respectively heated or cooled, so that automatic control is realized, the first absolute T12 value is reduced to the threshold value, the temperature difference of the battery pack 11 is reduced, the consistency of the battery pack 11 is ensured, the service life of the battery pack 11 is prolonged, and the phenomenon of uneven heating and cooling of the battery cell 112 is avoided.
In certain embodiments, the present application provides a non-transitory computer-readable storage medium containing a computer-executable program which, when executed by one or more processors, implements the control method of any one of the embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or the like.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A control method for a battery pack, the control method comprising:
acquiring the temperature of the middle part of the battery core of the battery pack and taking the temperature as a first temperature;
acquiring the temperature of the edge part of the battery cell and taking the temperature as a second temperature, wherein the absolute value of the difference value between the first temperature and the second temperature is a first absolute value;
and under the condition that the first insulation value is larger than a threshold value, controlling the running state of a temperature regulation plate of the battery pack so as to reduce the first insulation value to be lower than the threshold value, wherein the battery cell is arranged on the temperature regulation plate.
2. The control method of claim 1, wherein the temperature adjustment plate has a first flow channel and a second flow channel, the first flow channel and the second flow channel are independently disposed, the first flow channel is disposed corresponding to a middle portion of the battery cell, the second flow channel is disposed corresponding to an edge portion of the battery cell, and the controlling the operation state of the temperature adjustment plate of the battery pack so that the first absolute value is reduced comprises:
controlling a state of a first medium in the first flow channel and/or a state of a second medium in the second flow channel to reduce the first absolute value below the threshold.
3. The control method according to claim 2, wherein the controlling the state of the medium in the first flow passage and/or the state of the medium in the second flow passage so that the first absolute value decreases below the threshold value in a case where the first temperature is greater than the second temperature and the current temperatures of the first medium and the second medium are the same includes:
controlling the flow rate of the first flow passage to be smaller than that of the second flow passage under the condition that the current temperature of the first medium is higher than the first temperature; or
Controlling the flow rate of the first flow passage to be larger than that of the second flow passage under the condition that the current temperature of the first medium is lower than the second temperature; or
And controlling the flow rate of the first flow channel and the flow rate of the second flow channel to be the same and be greater than a preset flow rate under the condition that the current temperature of the first medium is greater than the second temperature and is less than the first temperature.
4. The control method according to claim 2, characterized in that an absolute value of a difference between the first temperature and the current temperature of the first medium is a second absolute value, an absolute value of a difference between the second temperature and the current temperature of the second medium is a third absolute value,
the controlling the state of the medium in the first flow channel and/or the state of the medium in the second flow channel to reduce the first absolute value to below the threshold value comprises:
under the condition that the first temperature is higher than the second temperature and the flow rates of the first flow passage and the second flow passage are the same,
controlling the second absolute value to be smaller than the third absolute value and the current temperature of the second medium to be greater than the second temperature; or
And controlling the second absolute value to be larger than the third absolute value, the current temperature of the first medium to be smaller than the first temperature and the current temperature of the second medium to be smaller than the second temperature.
5. The control method according to claim 2, wherein the controlling the state of the medium in the first flow passage and/or the state of the medium in the second flow passage so that the first absolute value decreases below the threshold value in a case where the first temperature is less than the second temperature and the current temperatures of the first medium and the second medium are the same includes:
controlling the flow rate of the first flow passage to be smaller than that of the second flow passage under the condition that the current temperature of the first medium is lower than the first temperature; or
Controlling the flow rate of the first flow passage to be greater than that of the second flow passage when the current temperature of the first medium is greater than the second temperature; or
And controlling the flow rate of the first flow channel and the flow rate of the second flow channel to be the same and be greater than a preset flow rate under the condition that the current temperature of the first medium is greater than the first temperature and less than a second temperature.
6. The control method according to claim 2, characterized in that an absolute value of a difference between the first temperature and the current temperature of the first medium is a second absolute value, an absolute value of a difference between the second temperature and the current temperature of the second medium is a third absolute value,
the controlling the state of the medium in the first flow channel and/or the state of the medium in the second flow channel to reduce the absolute value below the threshold value comprises:
under the condition that the first temperature is lower than the second temperature and the flow rates of the first flow passage and the second flow passage are the same,
controlling the second absolute value to be smaller than the third absolute value and the current temperature of the second medium to be smaller than the second temperature; or
And controlling the second absolute value to be larger than the third absolute value, the current temperature of the first medium to be larger than the first temperature and the current temperature of the second medium to be larger than the second temperature.
7. The control method according to claim 3 or 5, wherein the first flow passage and the second flow passage are each connected to a flow control valve, the control method further comprising:
and controlling the opening degree of the flow control valve to control the flow of the first flow passage and the flow of the second flow passage.
8. A control device, characterized in that the control device comprises:
the first acquisition module is used for acquiring the temperature of the middle part of the battery cell of the battery pack and taking the temperature as a first temperature;
the second acquisition module is used for acquiring the temperature of the edge part of the battery cell and taking the temperature as a second temperature, and the absolute value of the difference value between the first temperature and the second temperature is a first absolute value;
and the control module is used for controlling the running state of a temperature adjusting plate of the battery pack to enable the absolute value to be reduced to be lower than the threshold value under the condition that the first absolute value is larger than the threshold value, and the battery cell is arranged on the temperature adjusting plate.
9. A battery control system, characterized in that the battery control system comprises:
the battery pack comprises a temperature adjusting plate and a battery core, wherein the battery core is arranged on the temperature adjusting plate;
a control assembly connected to the temperature regulating plate, the control assembly being adapted to implement the control method of any one of claims 1-7.
10. A non-transitory computer-readable storage medium of a computer-executable program, wherein the computer-executable program, when executed by one or more processors, implements the control method of any one of claims 1-7.
CN202110776585.6A 2021-07-09 2021-07-09 Control method, control device, battery control system, and storage medium Pending CN113555620A (en)

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Application publication date: 20211026