CN113871758B - Temperature control method and system of battery energy storage system and battery energy storage system - Google Patents
Temperature control method and system of battery energy storage system and battery energy storage system Download PDFInfo
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- CN113871758B CN113871758B CN202111035791.8A CN202111035791A CN113871758B CN 113871758 B CN113871758 B CN 113871758B CN 202111035791 A CN202111035791 A CN 202111035791A CN 113871758 B CN113871758 B CN 113871758B
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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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
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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
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
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- 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
- H01M10/635—Control systems based on ambient temperature
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Abstract
The invention discloses a temperature control method and a temperature control system of a battery energy storage system and the battery energy storage system, wherein the battery energy storage system comprises a battery system and a temperature adjusting unit, the battery system comprises a plurality of batteries, and the temperature control method comprises the following steps: collecting temperature values of all batteries; acquiring a minimum temperature value and a maximum temperature value according to all acquired temperature values; according to the minimum temperature value and the maximum temperature value, the temperature adjusting unit is controlled to enter different operation modes, so that the difference value between the maximum temperature value and the minimum temperature value is maintained within a preset range, the temperature of the battery energy storage system is controlled, and the temperature uniformity of the battery energy storage system is greatly improved.
Description
Technical Field
The invention relates to the technical field of battery energy storage systems, in particular to a temperature control method and system of a battery energy storage system and the battery energy storage system.
Background
The battery energy storage system converts electric energy into chemical energy through a battery for storage, and converts the chemical energy into electric energy when external power needs to be supplied. A container-type energy storage system is one type of system for battery energy storage systems. The container type energy storage system integrates a battery system, a battery management system, an environment monitoring system, a local monitoring system and other equipment into a whole by taking a container as a carrier, has the characteristics of high integration level, good safety, strong environmental adaptability and the like, and is increasingly applied to application scenes such as a power supply side, a power grid side, a user side and the like.
The battery system can not work under the environment of overhigh temperature, overlow temperature or overlarge temperature difference, otherwise, the service life of the battery system is influenced, and even serious safety accidents can be caused. In order to ensure the performance and safety of the battery system, the container type energy storage system must be provided with a thermal management system to keep the battery system working under proper temperature and temperature difference.
At present, a container type energy storage system thermal management system mainly comprises an air cooling system and a liquid cooling system. Compare the liquid cooling system, the air cooling system mainly opens and stops through control industry air conditioner and fan and realize battery system temperature control, possesses advantages such as system integrated level height, structural cost low, consequently a large amount of container formula energy storage system thermal management adopt the air cooling system. The control method of the air cooling system comprises a local control method and a remote control method. The local control method is to use the air conditioner and the fan local control logic to control the ambient temperature so as to indirectly control the battery temperature, and the method has poor thermal management control precision on the energy storage system. The remote control method is characterized in that the battery management system remotely controls the start and stop of the air conditioner and the fan according to the highest low temperature of the battery to directly control the temperature of the battery. Although the battery temperature can be controlled to be the highest and the lowest by the remote control method of the air cooling system, the temperature difference of the battery system is aggravated when the air conditioner is controlled to continuously refrigerate or heat, and the temperature uniformity of the battery system is reduced, so that the normal operation of the energy storage system is influenced, and the power consumption of the energy storage system is increased. In addition, the addition of a fan to the air cooling system results in complicated control, increased cost, and increased power consumption.
Disclosure of Invention
The invention aims to overcome the defect of poor temperature uniformity of a battery system in the prior art, and provides a temperature control method and system of a battery energy storage system and the battery energy storage system.
The invention solves the technical problems through the following technical scheme:
the invention provides a temperature control method of a battery energy storage system, wherein the battery energy storage system comprises a battery system and a temperature adjusting unit, the battery system comprises a plurality of batteries, and the temperature control method comprises the following steps:
collecting temperature values of all batteries;
acquiring a minimum temperature value and a maximum temperature value according to the acquired temperature values of all the batteries;
and controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value so as to respectively maintain the maximum temperature value, the minimum temperature value, and the difference value between the maximum temperature value and the minimum temperature value within corresponding preset ranges.
Preferably, the step of controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value includes:
judging whether the minimum temperature value is less than or equal to a first threshold value or not;
if so, controlling the temperature adjusting unit to enter a heating mode under the condition that the maximum temperature value is smaller than a second threshold value;
if not, controlling the temperature adjusting unit to enter a cooling mode under the condition that the maximum temperature value is larger than or equal to a third threshold value, wherein the third threshold value is larger than the second threshold value, and the second threshold value is larger than the first threshold value.
Preferably, the step of controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value includes:
and under the conditions that the minimum temperature value is greater than the first threshold value, and the maximum temperature value is greater than, equal to, the second threshold value and less than the third threshold value, controlling the temperature adjusting unit to enter a cooling mode or an air supply mode according to the difference value between the maximum temperature value and the minimum temperature value.
Preferably, the controlling the temperature adjusting unit to enter a cooling mode or an air supply mode according to the difference between the maximum temperature value and the minimum temperature value specifically includes:
and if the difference value between the maximum temperature value and the minimum temperature value is smaller than a fourth threshold value Td2, controlling the temperature adjusting unit to enter a cooling mode, otherwise, controlling the temperature adjusting unit to enter an air supply mode.
Preferably, the step of controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value includes:
and under the condition that the minimum temperature value is greater than the first threshold value and the maximum temperature value is greater than or equal to a fifth threshold value and less than the second threshold value, controlling the temperature adjusting unit to enter an air supply mode or a stop mode according to a difference value between the maximum temperature value and the minimum temperature value, wherein the fifth threshold value is less than the second threshold value.
Preferably, the controlling the temperature adjusting unit to enter an air supply mode or a shutdown mode according to the difference between the maximum temperature value and the minimum temperature value specifically includes:
and if the difference value between the maximum temperature value and the minimum temperature value is greater than a sixth threshold value Td1, controlling the temperature adjusting unit to enter an air supply mode, otherwise, controlling the temperature adjusting unit to enter a shutdown mode.
Preferably, the step of controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value includes:
and if the minimum temperature value, the maximum temperature value or the difference value between the maximum temperature value and the minimum temperature value is abnormal, controlling the temperature adjusting unit to enter a shutdown mode.
The invention also provides a temperature control system of the battery energy storage system, the battery energy storage system comprises a battery system and a temperature adjusting unit, the battery system comprises a plurality of batteries, and the temperature control system comprises:
the acquisition module is used for acquiring temperature values of all the batteries;
the acquisition module is used for acquiring a minimum temperature value and a maximum temperature value according to the temperature value;
and the control module is used for controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value of all the batteries so as to enable the minimum temperature value, the maximum temperature value, and the difference value between the maximum temperature value and the minimum temperature value to be respectively maintained in corresponding preset ranges.
Preferably, the temperature adjusting unit is an air conditioner.
The invention also provides a battery energy storage system, which comprises a battery system, a temperature adjusting unit and the temperature control system of the battery energy storage system, wherein the battery system comprises a plurality of batteries.
The positive progress effects of the invention are as follows:
the invention discloses a temperature control method and system of a battery energy storage system and the battery energy storage system.
Drawings
Fig. 1 is a flowchart of a temperature control method of a battery energy storage system according to embodiment 1 of the present invention;
FIG. 2 is a flowchart of step S103 in embodiment 1 of the present invention;
fig. 3 is a flowchart of a temperature control method of a battery energy storage system according to an embodiment of the invention 1;
fig. 4 is a block diagram of a temperature control system of a battery energy storage system according to embodiment 2 of the present invention;
fig. 5 is a schematic block diagram of a battery energy storage system according to embodiment 2 of the present invention.
Fig. 6 is a schematic structural diagram of a battery energy storage system according to embodiment 2 of the present invention;
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the present embodiment discloses a temperature control method for a battery energy storage system, where the battery energy storage system includes a battery system and a temperature adjustment unit, where the battery system includes a plurality of batteries, and the temperature control method includes:
step S101, collecting temperature values of all batteries; specifically, one temperature sensor is provided for each battery for collecting a temperature value of each battery in the battery energy storage system.
Step S102, acquiring a minimum temperature value and a maximum temperature value according to the acquired temperature values of all the batteries; specifically, the collected temperature values of all the batteries may be sorted from small to large, and a minimum temperature value and a maximum temperature value are selected from the sorted temperature values.
Step S103, controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value, so that the maximum temperature value, the minimum temperature value, and the difference value between the maximum temperature value and the minimum temperature value are respectively maintained in corresponding preset ranges. The preset range can be set according to actual use, and when the difference value between the maximum temperature value and the minimum temperature value of the battery is in the preset range, the temperature uniformity of the battery energy storage system is in accordance with the use requirement. Specifically, the minimum temperature value and the maximum temperature value may be respectively compared with preset values, and if the preset conditions are met, the temperature adjusting unit is controlled to enter different operation modes.
In the present embodiment, the temperature adjustment unit is an execution component for temperature control of the battery system, and includes an industrial air conditioner and the like.
In one possible implementation, as shown in fig. 2, step S103 includes the following steps:
step S1031 of judging whether the minimum temperature value is less than or equal to a first threshold Th 1; if so, step S1032 is executed, otherwise, step S1033 is executed.
Step S1032, when the maximum temperature value is smaller than the second threshold Tc2, the temperature adjustment unit is controlled to enter the heating mode, and this stage may correspond to the strong heat control stage. The temperature adjusting unit may be controlled to exit the heating mode when the minimum temperature value is equal to or greater than Th1+ Thb 1; thb1 is a small return difference value to avoid frequent switching between entering heating mode and exiting heating mode, damaging equipment, and Thb1 may be 3 ℃.
Step S1033, in case the maximum temperature value is greater than or equal to the third threshold Tc3, controlling the temperature adjustment unit to enter the cooling mode, which may correspond to the strong cooling control phase. Wherein the third threshold is greater than the second threshold, and the second threshold is greater than the first threshold. The temperature adjustment unit may be controlled to exit the cooling mode when the maximum temperature value is less than or equal to Tc3-Tcb 3; tcb3 is a small return difference value to avoid frequent switching between entering and exiting cooling mode, damaging equipment, and Tcb3 may be 3 ℃.
In another practical manner, step S103 includes: in case that the minimum temperature value is greater than the first threshold value Th1, and the maximum temperature value is greater than or equal to the second threshold value Tc2 and less than the third threshold value Tc3, the temperature adjusting unit is controlled to enter the cooling mode or the air supply mode according to the difference between the maximum temperature value and the minimum temperature value, which may correspond to the heat transfer control stage. Specifically, controlling the temperature adjustment unit to enter the cooling mode or the air supply mode according to the difference between the maximum temperature value and the minimum temperature value specifically includes: if the difference value between the maximum temperature value and the minimum temperature value is smaller than a fourth threshold value Td2, the temperature adjusting unit is controlled to enter a cooling mode, otherwise, the temperature adjusting unit is controlled to enter an air supply mode, further, if the difference value between the maximum temperature value and the minimum temperature value is greater than or equal to Td2+ Tdb2, the temperature adjusting unit is controlled to exit the cooling mode and enter the air supply mode, wherein Tdb2 is a small return difference value, frequent switching between the cooling mode and the air supply mode and damage to equipment are avoided, and Tdb2 can be 2 ℃. The temperature adjusting unit may be controlled to exit the cooling mode/blowing mode when the maximum temperature value is less than or equal to Tc2-Tcb 2; tcb2 is a small return difference value to avoid frequent switching between entering the cooling mode/blowing mode and exiting the cooling mode/blowing mode to damage the equipment, and Tcb2 may be 3 ℃.
In still another embodiment, step S103 includes: and under the condition that the minimum temperature value is greater than the first threshold value Th1 and the maximum temperature value is greater than or equal to the fifth threshold value Tc1 and less than the second threshold value Tc2, controlling the temperature adjusting unit to enter an air supply mode or a shutdown mode according to the difference value between the maximum temperature value and the minimum temperature value, wherein the phase corresponds to a heat soaking control phase. Wherein the fifth threshold is less than the second threshold. Specifically, if the difference between the maximum temperature value and the minimum temperature value is greater than a sixth threshold Td1, the temperature adjustment unit is controlled to enter the air supply mode, otherwise, the temperature adjustment unit is controlled to enter the shutdown mode, further, if the difference between the maximum temperature value and the minimum temperature value is less than or equal to Td1-Tdb1, the temperature adjustment unit is controlled to exit the air supply mode and enter the shutdown mode, wherein Tdb1 is a small return difference value, so as to avoid frequent switching between the air supply mode and the shutdown mode and damage to the equipment, and Tdb1 may be 2 ℃. The temperature adjustment unit may be controlled to exit the air supply mode/shutdown mode when the maximum temperature value is less than or equal to Tc1-Tcb 1; tcb1 is a small backlash value to avoid frequent switching between entering the blow mode/off mode and exiting the blow mode/off mode, damaging the equipment, Tcb1 may be 3 ℃.
In this embodiment, the first threshold Th1 represents a strong heat stage opening temperature point, and may be set according to actual use, for example, Th1 is 5 ℃; the second threshold Tc2 represents a heat transfer stage starting temperature point, which can be set according to practical use, for example, Tc2 is 33 ℃; the third threshold Tc3 represents the opening temperature point of the intense heat stage, which can be set according to the practical use, and Tc3 is 40 ℃; a fourth threshold Td2 represents a heat removal temperature difference refrigeration starting temperature point, which can be set according to practical use, for example, Td2 is 5 ℃; the fifth threshold Tc1 represents the soaking stage starting temperature point, and can be set according to actual use, for example, Tc1 is 25 ℃; the sixth threshold Td1 represents the soaking temperature difference blowing-on temperature point, and may be set according to practical use, for example, Td1 is 5 ℃.
In still another embodiment, step S103 includes: if the minimum temperature value, the maximum temperature value or the difference value between the maximum temperature value and the minimum temperature value is abnormal, the temperature adjusting unit is controlled to enter a shutdown mode, and the stage can correspond to an abnormal stage. The minimum temperature value, the maximum temperature value or the difference between the maximum temperature value and the minimum temperature value is abnormally embodied in that the deviation between the minimum temperature value, the maximum temperature value or the difference between the maximum temperature value and the minimum temperature value and the corresponding preset temperature value respectively exceeds the corresponding allowable value, and each corresponding preset temperature value and corresponding allowable value are set according to actual use.
As shown in fig. 3, in a specific embodiment, the method for controlling the temperature of the battery energy storage system includes the following steps:
step S201, obtaining a minimum temperature value Tmin, a maximum temperature value Tmax and a difference value delta T between the maximum temperature value and the minimum temperature value of all batteries;
step S202, judging whether the minimum temperature value Tmin, the maximum temperature value Tmax and the difference value delta T between the maximum temperature value and the minimum temperature value are abnormal, if so, executing step S203, otherwise, executing step S204;
step S203, controlling the temperature adjusting unit to enter a shutdown mode; after the step is executed, the flow is ended;
step S204, judging whether the minimum temperature value Tmin is less than or equal to Th1, if so, executing step S205, and if not, executing step S301;
step S205, judging whether Tmax is less than Tc2, if yes, executing step S206, and if not, returning to step S203;
step S206, controlling the temperature adjusting unit to enter a heating mode;
step S207, judging whether Tmin is more than or equal to Th1+ Thb1, if yes, executing step S208, and if not, returning to step S206;
step S208, controlling the temperature adjusting unit to exit the heating mode; after the step is executed, the flow is ended;
step S301, judging whether Tmax is larger than or equal to Tc3 and Tmin is larger than Th1, if yes, executing step S302, and if not, executing step S401;
step S302, the temperature control unit enters a refrigeration mode;
step S303, judging whether Tmax is less than or equal to Tc3-Tcb3, if so, executing step S304, and if not, returning to step S302;
step S304, controlling the temperature adjusting unit to exit the refrigeration mode; after the step is executed, the flow is ended;
s401, judging whether Tc2 is more than or equal to Tmax and less than Tc 3;
s402, controlling a temperature adjusting unit to enter a refrigeration/air supply mode;
step S403, judging whether Tmax is less than or equal to Tc2-Tcb2, if so, executing step S404, otherwise, returning to step S402;
step S404, controlling the temperature adjusting unit to exit from a refrigeration/air supply mode;
step S501, judging whether Tmax is more than or equal to Tc1 and less than Tc2, if so, executing step S502, and if not, returning to step S203;
step S502, controlling the temperature adjusting unit to enter an air supply/stop mode;
step S503, judging whether Tmax is less than or equal to Tc1-Tcb1, if so, executing step S504, and if not, returning to step S502;
step S504, controlling the temperature adjusting unit to exit an air supply/shutdown mode; and finishing the process after the step is executed.
In the embodiment, the method comprises the steps of collecting temperature values of all batteries, obtaining a minimum temperature value and a maximum temperature value of all the batteries, and controlling a temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value so as to respectively maintain the maximum temperature value, the minimum temperature value and a difference value between the maximum temperature value and the minimum temperature value within corresponding preset ranges, thereby realizing the temperature control of the battery energy storage system and greatly improving the temperature uniformity of the battery system.
Example 2
As shown in fig. 4, the present embodiment discloses a temperature control system of a battery energy storage system, the battery energy storage system includes a battery system and a temperature adjustment unit, wherein the battery system includes a plurality of batteries, and the temperature control system 1 includes:
the acquisition module 11 is used for acquiring temperature values of all the batteries; specifically, one temperature sensor is provided for each battery for collecting a temperature value of each battery in the battery energy storage system.
The obtaining module 12 is configured to obtain a minimum temperature value and a maximum temperature value of all batteries of the battery according to the temperature value; specifically, the collected temperature values of all the batteries may be sorted from small to large, and a minimum temperature value and a maximum temperature value are selected from the sorted temperature values.
The control module 13 is configured to control the temperature adjustment unit to enter different operation modes according to the minimum temperature value and the maximum temperature value of the battery, so that the maximum temperature value, the minimum temperature value, and a difference value between the maximum temperature value and the minimum temperature value are respectively maintained within corresponding preset ranges. The preset range can be set according to actual use, and when the difference value between the maximum temperature value and the minimum temperature value of the battery is in the preset range, the temperature uniformity of the battery energy storage system is in accordance with the use requirement. Specifically, the minimum temperature value and the maximum temperature value may be respectively compared with preset values, and if the preset conditions are met, the temperature adjusting unit is controlled to enter different operation modes.
In an implementation manner, the control module 13 is specifically configured to: judging whether the minimum temperature value is less than or equal to a first threshold value Th 1; if yes, controlling the temperature adjusting unit to enter a heating mode under the condition that the maximum temperature value is smaller than a second threshold value Tc 2; if not, controlling the temperature adjusting unit to enter a cooling mode under the condition that the maximum temperature value is greater than or equal to a third threshold value Tc3, wherein the stage can correspond to a strong heat control stage; in case the maximum temperature value is greater than or equal to the second threshold Tc2 and less than the third threshold Tc3, the thermostat is controlled to enter the cooling mode, which may correspond to a forced cooling control phase. Wherein the third threshold is greater than the second threshold, and the second threshold is greater than the first threshold. The temperature adjusting unit may be controlled to exit the heating mode when the minimum temperature value is equal to or greater than Th1+ Thb 1; thb1 is a small return difference value to avoid frequent switching between entering heating mode and exiting heating mode, damaging equipment, and Thb1 may be 3 ℃. The temperature adjusting unit can be controlled to exit the cooling mode when the maximum temperature value is less than or equal to Tc3-Tcb 3; tcb3 is a small return difference value to avoid frequent switching between entering and exiting cooling mode, damaging equipment, and Tcb3 may be 3 ℃.
In another implementation manner, the control module 13 is further configured to: in case that the minimum temperature value is greater than the first threshold value Th1, and the maximum temperature value is greater than or equal to the second threshold value Tc2 and less than the third threshold value Tc3, the temperature adjusting unit is controlled to enter the cooling mode or the air supply mode according to the difference between the maximum temperature value and the minimum temperature value, which may correspond to the heat transfer control stage. Specifically, the control module controls the temperature adjustment unit to enter a cooling mode or an air supply mode according to a difference value between a maximum temperature value and a minimum temperature value, and specifically includes: if the difference value between the maximum temperature value and the minimum temperature value is smaller than a fourth threshold value Td2, the control module controls the temperature adjusting unit to enter a cooling mode, otherwise, the control module controls the temperature adjusting unit to enter an air supply mode. Further, if the difference between the maximum temperature value and the minimum temperature value is greater than or equal to Td2+ Tdb2, the temperature adjustment unit is controlled to exit the cooling mode and enter the air supply mode, wherein Tdb2 is a small return difference value, so that frequent switching between the cooling mode and the air supply mode and damage to equipment are avoided, and Tdb2 may be 2 ℃. The temperature adjusting unit may be controlled to exit the cooling mode/blowing mode when the maximum temperature value is less than or equal to Tc2-Tcb 2; tcb2 is a small return difference value to avoid frequent switching between entering the cooling mode/blowing mode and exiting the cooling mode/blowing mode to damage the equipment, and Tcb2 may be 3 ℃.
In another practical implementation manner, the control module 13 is further configured to: under the condition that the minimum temperature value is greater than the first threshold value Th1 and the maximum temperature value is greater than or equal to the fifth threshold value Tc1 and less than the second threshold value Tc2, the control module controls the temperature adjusting unit to enter an air supply mode or a shutdown mode according to the difference value between the maximum temperature value and the minimum temperature value, and the phase corresponds to a heat soaking control phase. Wherein the fifth threshold is less than the second threshold. Specifically, if the difference between the maximum temperature value and the minimum temperature value is greater than a sixth threshold Td1, the control module controls the temperature adjustment unit to enter the air supply mode, otherwise the control module controls the temperature adjustment unit to enter the shutdown mode, further, if the difference between the maximum temperature value and the minimum temperature value is less than or equal to Td1-Tdb1, the control module controls the temperature adjustment unit to exit the air supply mode to enter the shutdown mode, wherein Tdb1 is a small return difference value, which avoids frequent switching between the air supply mode and the shutdown mode and damages to the devices, and Tdb1 may be 2 ℃. The temperature adjustment unit may be controlled to exit the air supply mode/shutdown mode when the maximum temperature value is less than or equal to Tc1-Tcb 1; tcb1 is a small backlash value to avoid frequent switching between entering the blow mode/off mode and exiting the blow mode/off mode, damaging the equipment, Tcb1 may be 3 ℃.
In this embodiment, the first threshold Th1 represents a strong heat stage opening temperature point, and may be set according to actual use, for example, Th1 is 5 ℃; the second threshold Tc2 represents a heat transfer stage starting temperature point, which can be set according to practical use, for example, Tc2 is 33 ℃; the third threshold Tc3 represents the opening temperature point of the intense heat stage, which can be set according to the practical use, and Tc3 is 40 ℃; a fourth threshold Td2 represents a heat removal temperature difference refrigeration starting temperature point, which can be set according to practical use, for example, Td2 is 5 ℃; the fifth threshold Tc1 represents the soaking stage starting temperature point, and can be set according to actual use, for example, Tc1 is 25 ℃; the sixth threshold Td1 represents the soaking temperature difference blowing-on temperature point, and may be set according to practical use, for example, Td1 is 5 ℃.
In yet another embodiment, the control module 13 is further specifically configured to: if the minimum temperature value, the maximum temperature value or the difference value between the maximum temperature value and the minimum temperature value is abnormal, the control module controls the temperature adjusting unit to enter a shutdown mode, and the stage can correspond to an abnormal stage. The minimum temperature value, the maximum temperature value or the difference between the maximum temperature value and the minimum temperature value is abnormally embodied in that the deviation between the minimum temperature value, the maximum temperature value or the difference between the maximum temperature value and the minimum temperature value and the corresponding preset temperature value respectively exceeds the corresponding allowable value, and each corresponding preset temperature value and corresponding allowable value are set according to actual use.
In this embodiment, the temperature adjustment unit is an execution component for temperature control of the battery system, and includes equipment such as an industrial air conditioner.
As shown in fig. 3, in a specific embodiment, the method for controlling the temperature of the battery energy storage system by using the temperature control system of the battery energy storage system includes the following steps:
step S201, obtaining a minimum temperature value Tmin, a maximum temperature value Tmax and a difference value delta T between the maximum temperature value and the minimum temperature value of all batteries;
step S202, judging whether the minimum temperature value Tmin, the maximum temperature value Tmax and the difference value delta T between the maximum temperature value and the minimum temperature value are abnormal, if so, executing step S203, otherwise, executing step S204;
step S203, controlling the temperature adjusting unit to enter a shutdown mode; after the step is executed, the flow is ended;
step S204, judging whether the minimum temperature value Tmin is less than or equal to Th1, if so, executing step S205, and if not, executing step S301;
step S205, judging whether Tmax is less than Tc2, if yes, executing step S206, and if not, returning to step S203;
step S206, controlling the temperature adjusting unit to enter a heating mode;
step S207, judging whether Tmin is more than or equal to Th1+ Thb1, if yes, executing step S208, and if not, returning to step S206;
step S208, controlling the temperature adjusting unit to exit the heating mode; after the step is executed, the flow is ended;
step S301, judging whether Tmax is larger than or equal to Tc3 and Tmin is larger than Th1, if yes, executing step S302, and if not, executing step S401;
step S302, the temperature control unit enters a refrigeration mode;
step S303, judging whether Tmax is less than or equal to Tc3-Tcb3, if so, executing step S304, and if not, returning to step S302;
step S304, controlling the temperature adjusting unit to exit the refrigeration mode; after the step is executed, the flow is ended;
s401, judging whether Tc2 is more than or equal to Tmax and less than Tc 3;
step S402, controlling the temperature adjusting unit to enter a refrigeration/air supply mode;
step S403, judging whether Tmax is less than or equal to Tc2-Tcb2, if so, executing step S404, otherwise, returning to step S402;
step S404, controlling the temperature adjusting unit to exit from a refrigeration/air supply mode;
step S501, judging whether Tmax is more than or equal to Tc1 and less than Tc2, if so, executing step S502, and if not, returning to step S203;
step S502, controlling the temperature adjusting unit to enter an air supply/stop mode;
step S503, judging whether Tmax is less than or equal to Tc1-Tcb1, if so, executing step S504, and if not, returning to step S502;
step S504, controlling the temperature adjusting unit to exit an air supply/shutdown mode; and finishing the process after the step is executed.
In the embodiment, a temperature control system of a battery energy storage system is disclosed, the system is provided with an acquisition module 11, an acquisition module 12, a control module 13, the temperature values of all batteries are acquired through the acquisition module 11, the acquisition module 12 acquires the minimum temperature value and the maximum temperature value of all batteries, the control module 13 controls a temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value, so that the maximum temperature value, the minimum temperature value, the difference value between the maximum temperature value and the minimum temperature value is respectively maintained in the corresponding preset range, the temperature control of the battery energy storage system is realized, and the temperature uniformity of the battery energy storage system is greatly improved. In addition, the temperature control system is used for controlling the temperature of the battery energy storage system, a fan is not needed to be configured, the hardware of the temperature control system is simplified, the cost of the temperature control system is reduced, and meanwhile the stability of the temperature control system is improved.
Example 3
As shown in fig. 5, the present embodiment discloses a battery energy storage system, which includes a battery system 2, a temperature adjustment unit 3, and a temperature control system 1 of the battery energy storage system according to embodiment 2, wherein the battery system includes a plurality of battery clusters, and each battery cluster is composed of a plurality of batteries. As shown in fig. 6, the battery cluster and the temperature adjustment unit, for example, an air conditioner, may be respectively disposed in the battery compartment of the battery energy storage system; in addition, the acquisition module 11, the acquisition module 12 and the control module 13 are respectively arranged in an electric control cabin of the battery energy storage system.
The embodiment discloses a battery energy storage system, this battery energy storage system includes battery system, temperature regulating unit and battery energy storage system's temperature control system, gather the temperature value of all batteries through collection module, acquire minimum temperature value and the maximum temperature value that the module acquireed all batteries, control module is according to minimum temperature value and maximum temperature value, control temperature regulating unit gets into different operation modes, so that the maximum temperature value, the minimum temperature value, the difference between maximum temperature value and the minimum temperature value maintains respectively in the predetermined within range that corresponds, thereby realize the temperature control to battery energy storage system, battery energy storage system's temperature homogeneity has been promoted greatly. In addition, the temperature control system is used for controlling the temperature of the battery energy storage system, a fan is not needed to be configured, the hardware of the temperature control system is simplified, the battery energy storage system is further simplified, the cost of the battery energy storage system is reduced, and meanwhile the stability of the battery energy storage system is improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (8)
1. The temperature control method of the battery energy storage system is characterized in that the battery energy storage system comprises a battery system and a temperature adjusting unit, the battery system comprises a plurality of batteries, and the temperature control method comprises the following steps:
collecting temperature values of all batteries;
acquiring a minimum temperature value and a maximum temperature value according to the acquired temperature values of all the batteries;
controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value so as to respectively maintain the maximum temperature value, the minimum temperature value, and the difference value between the maximum temperature value and the minimum temperature value within corresponding preset ranges;
wherein, the step of controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value comprises the following steps:
judging whether the minimum temperature value is less than or equal to a first threshold value or not;
if so, controlling the temperature adjusting unit to enter a heating mode under the condition that the maximum temperature value is smaller than a second threshold value;
if not, controlling the temperature adjusting unit to enter a refrigeration mode under the condition that the maximum temperature value is greater than or equal to a third threshold value, and controlling the temperature adjusting unit to enter an air supply mode or a shutdown mode according to a difference value between the maximum temperature value and the minimum temperature value under the condition that the maximum temperature value is greater than or equal to a fifth threshold value and is smaller than a second threshold value;
wherein the third threshold is greater than the second threshold, the second threshold is greater than the first threshold, and the fifth threshold is less than the second threshold.
2. The method of claim 1, wherein the step of controlling the temperature adjustment unit to enter different operating modes according to the minimum temperature value and the maximum temperature value comprises:
and under the conditions that the minimum temperature value is greater than the first threshold value, and the maximum temperature value is greater than or equal to the second threshold value and less than the third threshold value, controlling the temperature adjusting unit to enter a cooling mode or an air supply mode according to a difference value between the maximum temperature value and the minimum temperature value.
3. The method according to claim 2, wherein the controlling the temperature adjustment unit to enter a cooling mode or an air supply mode according to the difference between the maximum temperature value and the minimum temperature value specifically comprises:
and if the difference value between the maximum temperature value and the minimum temperature value is smaller than a fourth threshold value, controlling the temperature adjusting unit to enter a refrigeration mode, otherwise, controlling the temperature adjusting unit to enter an air supply mode.
4. The method according to claim 1, wherein the controlling the temperature adjustment unit to enter an air supply mode or a shutdown mode according to the difference between the maximum temperature value and the minimum temperature value specifically comprises:
and if the difference value between the maximum temperature value and the minimum temperature value is larger than a sixth threshold value, controlling the temperature adjusting unit to enter an air supply mode, otherwise, controlling the temperature adjusting unit to enter a shutdown mode.
5. The method of claim 1, wherein the step of controlling the temperature adjustment unit to enter different operating modes according to the minimum temperature value and the maximum temperature value comprises:
and if the minimum temperature value, the maximum temperature value or the difference value between the maximum temperature value and the minimum temperature value is abnormal, controlling the temperature adjusting unit to enter a shutdown mode.
6. The utility model provides a temperature control system of battery energy storage system, its characterized in that, battery energy storage system includes battery system and temperature regulation unit, battery system includes a plurality of battery, temperature control system includes:
the acquisition module is used for acquiring temperature values of all the batteries;
the acquisition module is used for acquiring a minimum temperature value and a maximum temperature value according to the temperature values of all the batteries;
the control module is used for controlling the temperature adjusting unit to enter different operation modes according to the minimum temperature value and the maximum temperature value so as to enable the minimum temperature value, the maximum temperature value, and the difference value between the maximum temperature value and the minimum temperature value to be respectively maintained in corresponding preset ranges;
the control module is specifically configured to determine whether the minimum temperature value is less than or equal to a first threshold value;
if so, controlling the temperature adjusting unit to enter a heating mode under the condition that the maximum temperature value is smaller than a second threshold value;
if not, controlling the temperature adjusting unit to enter a refrigeration mode under the condition that the maximum temperature value is greater than or equal to a third threshold value, and controlling the temperature adjusting unit to enter an air supply mode or a shutdown mode according to a difference value between the maximum temperature value and the minimum temperature value under the condition that the maximum temperature value is greater than or equal to a fifth threshold value and is smaller than a second threshold value;
wherein the third threshold is greater than the second threshold, the second threshold is greater than the first threshold, and the fifth threshold is less than the second threshold.
7. The temperature control system of a battery energy storage system of claim 6, wherein the temperature conditioning unit is an air conditioner.
8. A battery energy storage system, characterized in that the battery energy storage system comprises a battery system, a temperature regulating unit and the temperature control system of the battery energy storage system according to claim 6 or 7, wherein the battery system comprises a plurality of batteries.
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