CN113791655A - Temperature difference control method, device, equipment and storage medium for energy storage system - Google Patents
Temperature difference control method, device, equipment and storage medium for energy storage system Download PDFInfo
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- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a temperature difference control method, a temperature difference control device, temperature difference control equipment and a temperature difference control storage medium for an energy storage system, and belongs to the technical field of control. According to the temperature difference control method for the energy storage system, the battery core temperature parameter of each battery module is obtained according to the preset time, the module temperature parameter of each battery module is obtained according to the battery core temperature parameter, and therefore the system temperature parameter is obtained according to the average module temperature. And finally, adjusting the output duty ratio of a fan in each battery module to change the system temperature difference according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature, so that the system temperature difference can be conveniently adjusted, and the working stability of the energy storage system is improved.
Description
Technical Field
The invention relates to the technical field of control, in particular to a temperature difference control method, a temperature difference control device, temperature difference control equipment and a storage medium for an energy storage system.
Background
At present, in the temperature control of an energy storage system, the temperature difference of the whole system cannot be controlled well, so how to provide a temperature difference control method conveniently used for the energy storage system can conveniently adjust the temperature difference of the energy storage system, improve the working stability of the energy storage system, and solve the problem of high urgency.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a temperature difference control method for an energy storage system, which can conveniently adjust the system temperature difference of the energy storage system and improve the working stability of the energy storage system.
The invention also provides a temperature difference control device for the energy storage system, which has the temperature difference control method for the energy storage system.
The invention also provides temperature difference control equipment with the temperature difference control method for the energy storage system.
The invention also provides a computer readable storage medium.
According to the temperature difference control method for the energy storage system, the temperature difference control method comprises the following steps:
acquiring a cell temperature parameter of each battery module according to preset time;
obtaining module temperature parameters of each battery module according to the battery core temperature parameters, wherein the module temperature parameters comprise module average temperature, module highest temperature and module lowest temperature;
obtaining a system temperature parameter according to the average temperature of the module, wherein the system temperature parameter comprises the lowest system temperature and the temperature difference of the system;
and adjusting the output duty ratio of a fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature.
The temperature difference control method for the energy storage system according to the embodiment of the invention at least has the following beneficial effects: according to the temperature difference control method for the energy storage system, the battery core temperature parameter of each battery module is obtained according to the preset time, the module temperature parameter of each battery module is obtained according to the battery core temperature parameter, and therefore the system temperature parameter is obtained according to the average temperature of the modules. And finally, adjusting the output duty ratio of the fan in each battery module to change the system temperature difference according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature, so that the system temperature difference of the energy storage system can be conveniently adjusted, and the working stability of the energy storage system is improved.
According to some embodiments of the invention, the adjusting the output duty ratio of the fan within each of the battery modules according to the system temperature difference, the module average temperature, the module maximum temperature, and the system minimum temperature includes:
if the system temperature difference is smaller than a preset temperature difference threshold value, adjusting the output duty ratio of a fan in each battery module according to the average module temperature and the maximum module temperature;
and if the system temperature difference is greater than or equal to a preset temperature difference threshold value, adjusting the output duty ratio of a fan in each battery module according to the average module temperature, the maximum module temperature and the minimum system temperature.
According to some embodiments of the present invention, if the system temperature difference is smaller than a preset temperature difference threshold, adjusting the output duty ratio of the fan in each battery module according to the module average temperature and the module maximum temperature includes:
if the highest module temperature is greater than a first temperature threshold value, or the average module temperature is greater than or equal to a second temperature threshold value, adjusting the fan output duty ratio of the battery module to a first duty ratio;
if the average temperature of the module is less than a second temperature threshold and the average temperature of the module is greater than or equal to a third temperature threshold, adjusting the fan output duty ratio of the battery module to a second duty ratio;
if the average module temperature is lower than a third temperature threshold and the average module temperature is higher than or equal to a fourth temperature threshold, adjusting the fan output duty ratio of the battery module to a third duty ratio;
if the average temperature of the module is less than a fourth temperature threshold and the average temperature of the module is greater than or equal to a fifth temperature threshold, adjusting the fan output duty ratio of the battery module to a fourth duty ratio,
wherein the first temperature threshold is greater than the second temperature threshold, the second temperature threshold is greater than the third temperature threshold, the third temperature threshold is greater than the fourth temperature threshold, and the fourth temperature threshold is greater than the fifth temperature threshold.
According to some embodiments of the present invention, if the system temperature difference is greater than or equal to a preset temperature difference threshold, adjusting the output duty ratio of the fan in each battery module according to the module average temperature, the module maximum temperature, and the system minimum temperature includes:
determining a battery module corresponding to the lowest temperature of the system, and recording as a first module;
and adjusting the output duty ratio of the fan in the first module according to the acquired module highest temperature of the first module.
According to some embodiments of the present invention, the adjusting the output duty cycle of the fan in the first module according to the obtained module highest temperature of the first module includes:
if the highest temperature of the module is greater than a first temperature threshold, adjusting the fan output duty ratio of the first module to a first duty ratio;
and if the highest temperature of the module is less than or equal to a first temperature threshold value, adjusting the fan output duty ratio of the first module to a fifth duty ratio.
According to some embodiments of the present invention, if the system temperature difference is greater than or equal to a preset temperature difference threshold, adjusting the output duty ratio of the fan in each battery module according to the module average temperature, the module maximum temperature, and the system minimum temperature includes:
marking the battery modules except the first module as second modules;
and adjusting the output duty ratio of the fan in the second module according to the acquired module highest temperature and module average temperature of the second module.
According to some embodiments of the present invention, the adjusting the output duty cycle of the fan in the second module according to the obtained module maximum temperature and module average temperature of the second module includes:
if the highest temperature of the module is greater than a first temperature threshold value, or the average temperature of the module is greater than or equal to a second temperature threshold value, adjusting the fan output duty ratio of the second module to be a first duty ratio;
if the average temperature of the module is less than a second temperature threshold and the average temperature of the module is greater than or equal to a third temperature threshold, adjusting the fan output duty ratio of the second module to a second duty ratio;
if the average temperature of the module is less than a third temperature threshold and the average temperature of the module is greater than or equal to a fourth temperature threshold, adjusting the fan output duty ratio of the second module to a third duty ratio;
if the average temperature of the module is less than a fourth temperature threshold and the average temperature of the module is greater than or equal to a fifth temperature threshold, adjusting the fan output duty ratio of the second module to a fourth duty ratio,
wherein the first temperature threshold is greater than the second temperature threshold, the second temperature threshold is greater than the third temperature threshold, the third temperature threshold is greater than the fourth temperature threshold, and the fourth temperature threshold is greater than the fifth temperature threshold.
According to a second aspect of the present invention, a temperature difference control device for an energy storage system includes:
the battery core temperature parameter acquisition module is used for acquiring the battery core temperature parameter of each battery module according to preset time;
the module temperature parameter determining module is used for obtaining a module temperature parameter of each battery module according to the battery core temperature parameter, wherein the module temperature parameter comprises a module average temperature, a module maximum temperature and a module minimum temperature;
the system temperature parameter determining module is used for obtaining a system temperature parameter according to the average temperature of the module, wherein the system temperature parameter comprises the lowest system temperature and the temperature difference of the system;
and the temperature difference adjusting module is used for adjusting the output duty ratio of the fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature.
The temperature difference control device for the energy storage system, provided by the embodiment of the invention, has at least the following beneficial effects: the temperature difference control device for the energy storage system obtains the cell temperature parameter of each battery module through the cell temperature parameter obtaining module according to the preset time, and the module temperature parameter determining module obtains the module temperature parameter of each battery module according to the cell temperature parameter, so that the module temperature parameter determining module obtains the system temperature parameter according to the module average temperature. And finally, the temperature difference adjusting module adjusts the output duty ratio of the fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature to change the system temperature difference, so that the system temperature difference can be conveniently adjusted, and the working stability of the energy storage system is improved.
A temperature difference control apparatus according to an embodiment of a third aspect of the invention includes:
at least one processor, and,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions, and the instructions are executed by the at least one processor, so that the at least one processor, when executing the instructions, implements the temperature difference control method for the energy storage system according to the embodiment of the first aspect.
The temperature difference control device provided by the embodiment of the invention has at least the following beneficial effects: the temperature difference control equipment adopts the temperature difference control method for the energy storage system, obtains the cell temperature parameter of each battery module at a preset time interval, and determines the module temperature parameter of each battery module according to the cell temperature parameter, so that the system temperature parameter is determined according to the average temperature of the modules. And finally, adjusting the output duty ratio of a fan in each battery module to change the system temperature difference according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature, so that the system temperature difference can be conveniently adjusted, and the working stability of the energy storage system is improved.
According to a fourth aspect of the present invention, there is provided a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the temperature difference control method for an energy storage system according to the first aspect.
The computer-readable storage medium according to the embodiment of the invention has at least the following advantages: the computer-readable storage medium executes the temperature difference control method for the energy storage system, and the temperature parameter of the battery module is determined according to the temperature parameter of the battery cell by acquiring the temperature parameter of the battery cell of each battery module at preset time intervals, so that the temperature parameter of the system is determined according to the average temperature of the battery modules. And finally, adjusting the output duty ratio of a fan in each battery module to change the system temperature difference according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature, so that the system temperature difference can be conveniently adjusted, and the working stability of the energy storage system is improved.
Additional aspects and advantages of the invention 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 invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a flow chart of a temperature difference control method for an energy storage system according to an embodiment of the invention;
FIG. 2 is a flowchart of step S104 in FIG. 1;
FIG. 3 is a flowchart of step S201 in FIG. 2;
FIG. 4 is a flowchart of step S202 in FIG. 2;
FIG. 5 is a flowchart of step S402 in FIG. 4;
FIG. 6 is another partial flowchart of step S202 in FIG. 2;
FIG. 7 is a flowchart of step S602 in FIG. 6;
fig. 8 is a schematic structural diagram of a temperature difference control device for an energy storage system according to an embodiment of the present invention.
Reference numerals: 810. a battery core temperature parameter acquisition module; 820. a module temperature parameter determination module; 830. a system temperature parameter determination module; 840. and a temperature difference adjusting module.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, 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 only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means 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 invention. In this specification, the schematic representations of the terms used above 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.
In a first aspect, referring to fig. 1, a temperature difference control method for an energy storage system according to an embodiment of the present invention includes:
s101, obtaining a cell temperature parameter of each battery module according to preset time;
s102, obtaining module temperature parameters of each battery module according to the battery core temperature parameters, wherein the module temperature parameters comprise module average temperature, module highest temperature and module lowest temperature;
s103, obtaining system temperature parameters according to the average temperature of the module, wherein the system temperature parameters comprise the lowest system temperature and the temperature difference of the system;
and S104, adjusting the output duty ratio of the fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature.
When the temperature of the energy storage system is adjusted, the core temperature parameter of each battery module is firstly acquired according to the preset time, and it should be noted that the preset time can be set according to the actual situation, for example, the core temperature parameter of each battery module is acquired at 1 minute intervals, where the core temperature parameter includes the current temperature value of each core. And obtaining the module temperature parameter of each battery module according to the cell temperature parameter. Specifically, calculate the average temperature value of electric core, regard this average temperature value as the module average temperature of battery module, compare the size of the current temperature value of all electric cores in this battery module, regard the biggest current temperature value as the module highest temperature, regard the minimum current temperature value as the module minimum temperature. Furthermore, according to the module temperature parameters, system temperature parameters can be obtained, namely the system highest temperature, the system lowest temperature and the system average temperature of the whole system can be obtained by comparing the temperature values of each battery module, and meanwhile, the system temperature difference is obtained by making a difference between the system highest temperature and the system lowest temperature, so that the output duty ratio of a fan in each battery module can be conveniently obtained according to the system temperature difference, the module average temperature, the module highest temperature and the system lowest temperature, the system temperature difference is changed, the method can conveniently adjust the system temperature difference, and the working stability of the energy storage system is improved.
Referring to fig. 2, in some embodiments, step S104 includes:
s201, if the system temperature difference is smaller than a preset temperature difference threshold value, adjusting the output duty ratio of a fan in each battery module according to the average module temperature and the highest module temperature;
s202, if the system temperature difference is larger than or equal to a preset temperature difference threshold value, adjusting the output duty ratio of the fan in each battery module according to the average module temperature, the highest module temperature and the lowest system temperature.
When the temperature of the energy storage system is adjusted, when the system temperature difference is less than a preset temperature difference threshold value, the output duty ratio of the fan in each battery module is adjusted according to the module average temperature and the module maximum temperature, and when the system temperature difference is greater than or equal to the preset temperature difference threshold value, the output duty ratio of the fan in each battery module is adjusted according to the module average temperature, the module maximum temperature and the system minimum temperature, specifically, the temperature difference threshold value can be set according to the actual situation, for example, the temperature difference threshold value is 5 ℃, when the system temperature difference is less than 5 ℃, the output duty ratio of the fan in each battery module can be further adjusted according to the module average temperature and the module maximum temperature, and when the system temperature difference is not less than 5 ℃, the output duty ratio of the fan in each battery module is adjusted according to the module average temperature, the module maximum temperature and the system minimum temperature, further judgment and adjustment strategies are determined according to the system temperature difference, the system temperature difference can be conveniently adjusted, and the working stability of the energy storage system is improved.
Referring to fig. 3, in some embodiments, step S201 includes:
s301, if the highest temperature of the module is greater than a first temperature threshold value, or the average temperature of the module is greater than or equal to a second temperature threshold value, adjusting the fan output duty ratio of the battery module to be a first duty ratio;
s302, if the average temperature of the module is smaller than a second temperature threshold value and the average temperature of the module is larger than or equal to a third temperature threshold value, adjusting the fan output duty ratio of the battery module to be a second duty ratio;
s303, if the average temperature of the module is less than the third temperature threshold and the average temperature of the module is greater than or equal to the fourth temperature threshold, adjusting the fan output duty ratio of the battery module to a third duty ratio;
s304, if the average temperature of the module is less than the fourth temperature threshold and the average temperature of the module is greater than or equal to the fifth temperature threshold, adjusting the fan output duty ratio of the battery module to a fourth duty ratio;
the first temperature threshold is greater than the second temperature threshold, the second temperature threshold is greater than the third temperature threshold, the third temperature threshold is greater than the fourth temperature threshold, and the fourth temperature threshold is greater than the fifth temperature threshold.
When the system temperature difference is smaller than a preset temperature difference threshold, and the output duty ratio of the fan in each battery module is adjusted according to the module average temperature and the module maximum temperature, a plurality of temperature thresholds can be preset according to actual conditions, for example, a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold and a fifth temperature threshold are set, and the fan output duty ratio of the battery modules is adjusted to the preset duty ratio by comparing the module maximum temperature, the module average temperature and the temperature thresholds. For example, the first temperature threshold value is 38 ℃, the second temperature threshold value is 35 ℃, the third temperature threshold value is 32 ℃, the fourth temperature threshold value is 29 ℃ and the fifth temperature threshold value is 26 ℃. And if the highest module temperature is higher than 38 ℃ or the average module temperature is higher than or equal to 35 ℃, adjusting the fan output duty ratio of the battery module to 100%. And if the average temperature of the module is less than 35 ℃ and the average temperature of the module is greater than or equal to 32 ℃, adjusting the fan output duty ratio of the battery module to 75%. And if the average temperature of the module is less than 32 ℃ and the average temperature of the module is more than or equal to 29 ℃, adjusting the fan output duty ratio of the battery module to 50%. And if the average temperature of the module is less than 29 ℃ and the average temperature of the module is more than or equal to 26 ℃, adjusting the fan output duty ratio of the battery module to 25%. According to the method, the corresponding fan output duty ratio is set according to the preset different temperature intervals, the fan output duty ratio of the battery module is adjusted according to the temperature interval of the highest temperature of the module and the average temperature of the module, the temperature difference of the whole system can be reduced well, and the working stability of the energy storage system is improved.
Referring to fig. 4, in some embodiments, step S202 includes:
s401, determining a battery module corresponding to the lowest temperature of the system, and recording as a first module;
s402, adjusting the output duty ratio of the fan in the first module according to the acquired module highest temperature of the first module.
In order to further reduce the system temperature difference, the temperature of the battery module with the lowest module temperature can be independently adjusted when the system temperature difference is larger than or equal to a preset temperature difference threshold value. Specifically, a battery module corresponding to the lowest system temperature is determined, the battery module is recorded as a first module, the highest module temperature of the first module is obtained, the highest module temperature of the first module is compared with a preset temperature threshold, and the output duty ratio of a fan of the first module is adjusted according to the comparison condition. Through the temperature independent control to the battery module that the module temperature is minimum, can reduce the temperature difference of this battery module and battery module to reduce the system temperature difference, improve energy storage system's job stabilization nature.
Referring to fig. 5, in some embodiments, step S402, comprises:
s501, if the highest temperature of the module is larger than a first temperature threshold, adjusting the fan output duty ratio of the first module to be a first duty ratio;
s502, if the highest temperature of the modules is less than or equal to the first temperature threshold, the fan output duty ratio of the first module is adjusted to be a fifth duty ratio.
When the temperature of the battery module with the lowest module temperature is independently adjusted, if the highest module temperature is greater than a first temperature threshold value, the fan output duty ratio of the first module is adjusted to a first duty ratio, and if the highest module temperature is less than or equal to the first temperature threshold value, the fan output duty ratio of the first module is adjusted to a fifth duty ratio. Specifically, the first temperature threshold may be set according to actual conditions, for example, the first temperature threshold is 38 ℃, if the maximum module temperature is greater than 38 ℃, in order to rapidly cool the battery module, the output duty ratio of the fan of the first module is adjusted to 100%, the fan in the first module is fully rotated, and the maximum module temperature is less than or equal to 38 ℃, in order to reduce the temperature difference between the first module and the battery module, the output duty ratio of the fan of the first module is adjusted to 0, and the fan in the first module is stopped. Through the temperature independent control to the battery module that the module temperature is minimum, can reduce the temperature difference of this battery module and battery module to reduce the system temperature difference, improve energy storage system's job stabilization nature.
Referring to fig. 6, in some embodiments, step S202 includes:
s601, marking the battery modules except the first module as second modules;
and S602, adjusting the output duty ratio of the fan in the second module according to the acquired module highest temperature and module average temperature of the second module.
In order to further reduce the system temperature difference, the temperature of the battery module with the lowest module temperature can be independently adjusted when the system temperature difference is larger than or equal to a preset temperature difference threshold value. Specifically, the battery modules except the first module are marked as second modules, and the maximum module temperature and the average module temperature of each second module are obtained; and comparing the highest module temperature and the average module temperature of the battery modules with preset temperature thresholds, and adjusting the output duty ratio of the fan of each battery module according to the comparison condition. Through the unified adjustment to this a series of battery module, can reduce the regulation difference between the battery module, make things convenient for the overall regulation of system's difference in temperature to reduce the system's difference in temperature, improve energy storage system's job stabilization nature.
Referring to fig. 7, in some embodiments, step S602 includes:
s701, if the highest temperature of the module is greater than a first temperature threshold value, or the average temperature of the module is greater than or equal to a second temperature threshold value, adjusting the fan output duty ratio of the second module to be a first duty ratio;
s702, if the average temperature of the module is less than the second temperature threshold and the average temperature of the module is greater than or equal to a third temperature threshold, adjusting the fan output duty ratio of the second module to a second duty ratio;
s703, if the average temperature of the module is less than the third temperature threshold and the average temperature of the module is greater than or equal to the fourth temperature threshold, adjusting the fan output duty ratio of the second module to a third duty ratio;
s704, if the average temperature of the module is less than the fourth temperature threshold and the average temperature of the module is greater than or equal to the fifth temperature threshold, adjusting the fan output duty ratio of the second module to a fourth duty ratio;
the first temperature threshold is greater than the second temperature threshold, the second temperature threshold is greater than the third temperature threshold, the third temperature threshold is greater than the fourth temperature threshold, and the fourth temperature threshold is greater than the fifth temperature threshold.
When the output duty ratio of the fan in the second module is adjusted according to the acquired module highest temperature and module average temperature of the second module, a plurality of temperature thresholds may be preset according to actual conditions, for example, a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, and a fifth temperature threshold are set, and the output duty ratio of the fan of the second module is adjusted to the preset duty ratio by comparing the relationship between the module highest temperature, the module average temperature, and the temperature thresholds of each second module. For example, the first temperature threshold value is 38 ℃, the second temperature threshold value is 35 ℃, the third temperature threshold value is 32 ℃, the fourth temperature threshold value is 29 ℃ and the fifth temperature threshold value is 26 ℃. And if the maximum module temperature is higher than 38 ℃ or the average module temperature is higher than or equal to 35 ℃, adjusting the output duty ratio of the fan to be 100%. And if the average temperature of the module is less than 35 ℃ and the average temperature of the module is greater than or equal to 32 ℃, adjusting the output duty ratio of the fan to 75%. And if the average temperature of the module is less than 32 ℃ and the average temperature of the module is more than or equal to 29 ℃, adjusting the output duty ratio of the fan to be 50%. And if the average temperature of the module is less than 29 ℃ and the average temperature of the module is more than or equal to 26 ℃, adjusting the output duty ratio of the fan to 25%. According to the method, the corresponding fan output duty ratios are set according to the preset different temperature intervals, the fan output duty ratios of all the battery modules in the whole system except the battery module with the lowest module temperature are adjusted according to the temperature interval of the highest module temperature and the average module temperature, the temperature difference of the whole system can be reduced well, and the working stability of the energy storage system is improved.
When the maximum temperature of the system is greater than a third temperature threshold and is less than a fourth temperature threshold, the working mode of the air conditioner can be controlled according to the magnitude relation between the temperature difference of the system and the second temperature threshold, namely the second temperature threshold is 8 ℃, when the maximum temperature of the system is greater than the third temperature threshold, if the temperature difference of the system is not greater than 8 ℃, the refrigeration mode of the air conditioner can be controlled to be started to realize cooling, and when the maximum temperature of the system is less than the third temperature threshold (for example, 35 ℃), in order to avoid the increase of the temperature difference of the system, the air conditioner needs to be controlled to stop refrigeration, namely, the refrigeration mode of the air conditioner is controlled to be stopped, so that the temperature difference of the system can be conveniently adjusted, the temperature difference of the system is prevented from being aggravated when the temperature of the whole system is adjusted, and the working stability of the energy storage system is improved.
In a second aspect, referring to fig. 8, a temperature difference control apparatus for an energy storage system according to an embodiment of the present invention includes:
the cell temperature parameter acquiring module 810 is configured to acquire a cell temperature parameter of each battery module according to preset time;
a module temperature parameter determining module 820, configured to obtain a module temperature parameter of each battery module according to the cell temperature parameter, where the module temperature parameter includes a module average temperature, a module maximum temperature, and a module minimum temperature;
the system temperature parameter determining module 830 is configured to obtain a system temperature parameter according to the average temperature of the module, where the system temperature parameter includes a system minimum temperature and a system temperature difference;
and the temperature difference adjusting module 840 is used for adjusting the output duty ratio of the fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature.
In a third aspect, a temperature difference control device of an embodiment of the invention includes at least one processor, and a memory communicatively coupled to the at least one processor; the memory stores instructions, and the instructions are executed by the at least one processor, so that when the at least one processor executes the instructions, the temperature difference control method for the energy storage system as described in the first aspect is implemented.
In a fourth aspect, the present invention further provides a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions for causing a computer to execute the temperature difference control method for an energy storage system as defined in the first aspect.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A method of temperature differential control for an energy storage system, comprising:
acquiring a cell temperature parameter of each battery module according to preset time;
obtaining module temperature parameters of each battery module according to the battery core temperature parameters, wherein the module temperature parameters comprise module average temperature, module highest temperature and module lowest temperature;
obtaining a system temperature parameter according to the average temperature of the module, wherein the system temperature parameter comprises the lowest system temperature and the temperature difference of the system;
and adjusting the output duty ratio of a fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature.
2. The temperature difference control method for the energy storage system according to claim 1, wherein the adjusting the output duty ratio of the fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature, and the system minimum temperature comprises:
if the system temperature difference is smaller than a preset temperature difference threshold value, adjusting the output duty ratio of a fan in each battery module according to the average module temperature and the maximum module temperature;
and if the system temperature difference is greater than or equal to a preset temperature difference threshold value, adjusting the output duty ratio of a fan in each battery module according to the average module temperature, the maximum module temperature and the minimum system temperature.
3. The temperature difference control method for the energy storage system according to claim 2, wherein if the system temperature difference is smaller than a preset temperature difference threshold value, adjusting the output duty ratio of the fan in each battery module according to the average module temperature and the maximum module temperature comprises:
if the highest module temperature is greater than a first temperature threshold value, or the average module temperature is greater than or equal to a second temperature threshold value, adjusting the fan output duty ratio of the battery module to a first duty ratio;
if the average temperature of the module is less than a second temperature threshold and the average temperature of the module is greater than or equal to a third temperature threshold, adjusting the fan output duty ratio of the battery module to a second duty ratio;
if the average module temperature is lower than a third temperature threshold and the average module temperature is higher than or equal to a fourth temperature threshold, adjusting the fan output duty ratio of the battery module to a third duty ratio;
if the average temperature of the module is less than a fourth temperature threshold and the average temperature of the module is greater than or equal to a fifth temperature threshold, adjusting the fan output duty ratio of the battery module to a fourth duty ratio,
wherein the first temperature threshold is greater than the second temperature threshold, the second temperature threshold is greater than the third temperature threshold, the third temperature threshold is greater than the fourth temperature threshold, and the fourth temperature threshold is greater than the fifth temperature threshold.
4. The temperature difference control method for the energy storage system according to claim 2, wherein if the system temperature difference is greater than or equal to a preset temperature difference threshold value, adjusting the output duty cycle of the fan in each battery module according to the module average temperature, the module maximum temperature and the system minimum temperature comprises:
determining a battery module corresponding to the lowest temperature of the system, and recording as a first module;
and adjusting the output duty ratio of the fan in the first module according to the acquired module highest temperature of the first module.
5. The temperature difference control method for the energy storage system according to claim 4, wherein the adjusting the output duty cycle of the fan in the first module according to the acquired module highest temperature of the first module comprises:
if the highest temperature of the module is greater than a first temperature threshold, adjusting the fan output duty ratio of the first module to a first duty ratio;
and if the highest temperature of the module is less than or equal to a first temperature threshold value, adjusting the fan output duty ratio of the first module to a fifth duty ratio.
6. The temperature difference control method for the energy storage system according to claim 4, wherein if the system temperature difference is greater than or equal to a preset temperature difference threshold value, adjusting the output duty cycle of the fan in each battery module according to the module average temperature, the module maximum temperature and the system minimum temperature comprises:
marking the battery modules except the first module as second modules;
and adjusting the output duty ratio of the fan in the second module according to the acquired module highest temperature and module average temperature of the second module.
7. The temperature difference control method for the energy storage system according to claim 6, wherein the adjusting the output duty ratio of the fan in the second module according to the acquired module maximum temperature and module average temperature of the second module comprises:
if the highest temperature of the module is greater than a first temperature threshold value, or the average temperature of the module is greater than or equal to a second temperature threshold value, adjusting the fan output duty ratio of the second module to be a first duty ratio;
if the average temperature of the module is less than a second temperature threshold and the average temperature of the module is greater than or equal to a third temperature threshold, adjusting the fan output duty ratio of the second module to a second duty ratio;
if the average temperature of the module is less than a third temperature threshold and the average temperature of the module is greater than or equal to a fourth temperature threshold, adjusting the fan output duty ratio of the second module to a third duty ratio;
if the average temperature of the module is less than a fourth temperature threshold and the average temperature of the module is greater than or equal to a fifth temperature threshold, adjusting the fan output duty ratio of the second module to a fourth duty ratio,
wherein the first temperature threshold is greater than the second temperature threshold, the second temperature threshold is greater than the third temperature threshold, the third temperature threshold is greater than the fourth temperature threshold, and the fourth temperature threshold is greater than the fifth temperature threshold.
8. A temperature differential control apparatus for an energy storage system, comprising:
the battery core temperature parameter acquisition module is used for acquiring the battery core temperature parameter of each battery module according to preset time;
the module temperature parameter determining module is used for obtaining a module temperature parameter of each battery module according to the battery core temperature parameter, wherein the module temperature parameter comprises a module average temperature, a module maximum temperature and a module minimum temperature;
the system temperature parameter determining module is used for obtaining a system temperature parameter according to the average temperature of the module, wherein the system temperature parameter comprises the lowest system temperature and the temperature difference of the system;
and the temperature difference adjusting module is used for adjusting the output duty ratio of the fan in each battery module according to the system temperature difference, the module average temperature, the module maximum temperature and the system minimum temperature.
9. A temperature differential control apparatus for an energy storage system, comprising:
at least one processor, and,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions for execution by the at least one processor to cause the at least one processor, when executing the instructions, to implement the method for controlling temperature difference for an energy storage system of any of claims 1 to 7.
10. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the temperature difference control method for an energy storage system according to any one of claims 1 to 7.
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