CN117239305B - Thermal management control method and device for cabin-type energy storage system - Google Patents
Thermal management control method and device for cabin-type energy storage system Download PDFInfo
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- CN117239305B CN117239305B CN202311530737.XA CN202311530737A CN117239305B CN 117239305 B CN117239305 B CN 117239305B CN 202311530737 A CN202311530737 A CN 202311530737A CN 117239305 B CN117239305 B CN 117239305B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 120
- 239000000110 cooling liquid Substances 0.000 claims description 28
- 238000005192 partition Methods 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 11
- 230000004308 accommodation Effects 0.000 claims description 7
- 230000000875 corresponding effect Effects 0.000 description 42
- 108010066057 cabin-1 Proteins 0.000 description 33
- 230000000694 effects Effects 0.000 description 15
- 238000009833 condensation Methods 0.000 description 11
- 230000005494 condensation Effects 0.000 description 11
- 238000012937 correction Methods 0.000 description 9
- 238000011217 control strategy Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 7
- 239000002826 coolant Substances 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000012983 electrochemical energy storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to the technical field of energy storage, and particularly provides a thermal management control method and device of a cabin-type energy storage system, wherein the cabin-type energy storage system comprises a prefabricated cabin and an air cooling system arranged in the prefabricated cabin, the prefabricated cabin is provided with a plurality of battery accommodating cavities, and each battery accommodating cavity is correspondingly provided with a battery cluster formed by a plurality of battery modules; the thermal management control method comprises the following steps: acquiring the charge and discharge times of each battery module, the ambient temperature in each battery accommodating cavity and the average ambient humidity in the prefabricated cabin; determining the wind speed of the air cooling system corresponding to each battery module according to the charge and discharge times of each battery module; determining the air temperature of the air cooling system corresponding to each battery cluster according to the ambient temperature in each battery accommodating cavity; and determining the rheumatism in the prefabricated cabin corresponding to the air cooling system according to the average ambient humidity in the prefabricated cabin. The invention realizes the comprehensive control of the energy storage prefabricated cabin at the module level, the cluster level and the cabin level.
Description
Technical Field
The invention belongs to the technical field of energy storage, and particularly relates to a thermal management control method and device of a cabin-type energy storage system.
Background
With the rapid development of global economy, the energy demand rises year by year, and the problems of energy shortage, ecological environment pollution and destruction and the like are increasingly prominent. In order to effectively relieve the energy crisis and ecological environment problems, the renewable energy mainly comprising solar energy, wind energy and electrochemical energy storage can be stored in a large scale and released when in use, and compared with the solar energy and wind energy, the electrochemical energy storage has the advantages of being more efficient and reliable, being applicable to more scenes and the like.
The energy storage prefabricated cabin is a novel energy storage technology, and adopts advanced power electronic technology, battery technology, thermal management technology and the like, and integrates a battery pack, a management system, a cooling system and the like into a closed cabin body to realize a prefabricated, modularized, intelligent and systematic energy storage system.
The existing thermal management strategy of the energy storage prefabricated cabin generally adopts a mode of controlling the refrigeration temperature of the refrigeration system by detecting the temperature of the battery, the control mode is very single, the batteries at different positions in the prefabricated cabin are different, the environments at different positions in the refrigeration process are also different, the single thermal management control strategy cannot achieve a good refrigeration effect, and the safety is not high.
In view of the foregoing, there is a need in the art for a new method and apparatus for thermal management control of a compartmentalized energy storage system to address the above issues.
Disclosure of Invention
Object of the invention
The invention aims to provide a thermal management control method and device of a cabin-type energy storage system, and aims to solve the problems that the thermal management strategy of an existing energy storage prefabricated cabin is single in control, the refrigeration effect of a refrigeration system is poor and the safety is to be improved.
(II) technical scheme
In order to solve the above problems, a first aspect of the present invention provides a thermal management control method of a cabin-type energy storage system, the cabin-type energy storage system including a prefabricated cabin and an air cooling system disposed in the prefabricated cabin, the prefabricated cabin having a plurality of battery accommodation cavities, each battery accommodation cavity being correspondingly provided with a battery cluster composed of a plurality of battery modules;
the thermal management control method includes:
acquiring the charge and discharge times of each battery module, the ambient temperature in each battery accommodating cavity and the average ambient humidity in the prefabricated cabin;
determining the wind speed of the air cooling system corresponding to each battery module according to the charge and discharge times of each battery module;
determining the wind temperature of the air cooling system corresponding to each battery cluster according to the ambient temperature in each battery accommodating cavity;
and determining that the air cooling system corresponds to the rheumatism in the prefabricated cabin according to the average ambient humidity in the prefabricated cabin.
Preferably, the air cooling system includes a heat dissipation fan provided at each of the battery modules,
the step of determining the wind speed of the air cooling system corresponding to each battery module specifically includes:
a rotational speed of the cooling fan on each of the battery modules is determined.
Preferably, the air cooling system comprises a fan, a plurality of air channels and a plurality of air valves, wherein the fan is communicated with the air channels, the air channels are in one-to-one correspondence with the battery modules, the outlets of the air channels are aligned with the corresponding battery modules, and the air valves are arranged in the air channels in one-to-one correspondence;
the step of determining the wind speed of the air cooling system corresponding to each battery module specifically includes:
and under the condition that the fan rotates, determining the opening degree of the air valve in the air duct corresponding to each battery module.
Preferably, the step of determining the wind speed of the air cooling system corresponding to each battery module according to the charge and discharge times of each battery module specifically includes:
determining the wind speed of each battery module according to the percentage of the charge and discharge times of each battery module to the total charge and discharge times threshold value;
the higher the charge and discharge times of the battery module is in percentage of the total charge and discharge times threshold value, the higher the wind speed of the battery module is.
Preferably, the means for obtaining the ambient temperature in each of the battery accommodation chambers includes:
and calculating an average value of the ambient temperatures detected by a plurality of temperature sensors distributed at different positions in each battery accommodating cavity to obtain the ambient temperature in each battery accommodating cavity.
Preferably, the battery accommodating cavities are separated by a partition plate, a cooling liquid pipeline is arranged on one side of the partition plate facing each battery accommodating cavity, and wind provided by the air cooling system for each battery accommodating cavity flows through the cooling liquid pipeline;
the step of determining the air temperature of the air cooling system corresponding to each battery cluster according to the ambient temperature in each battery accommodating cavity specifically comprises the following steps:
determining the wind temperature of each battery cluster by determining the flow rate of the cooling liquid in the corresponding cooling liquid pipeline according to the ambient temperature in each battery accommodating cavity;
the higher the ambient temperature in the battery accommodating cavity is, the higher the flow of the cooling liquid in the corresponding cooling liquid pipeline is.
Preferably, a plurality of humidity sensors are arranged in the prefabricated cabin, at least one humidity sensor is arranged in each battery accommodating cavity, and the number of the humidity sensors in the prefabricated cabin is larger than the sum of the numbers of all the humidity sensors in the battery accommodating cavities;
the step of determining that the air cooling system corresponds to the rheumatism in the prefabricated cabin according to the average ambient humidity in the prefabricated cabin specifically comprises the following steps:
and determining the rheumatism of the air cooling system in the prefabricated cabin according to the average value of the ambient humidity detected by all the humidity sensors in the prefabricated cabin.
Preferably, the air cooling system comprises a circulating channel and a condensing part arranged in the circulating channel, the flow area of the condensing part is adjustable, and the wind dampness in the prefabricated cabin is adjusted by adjusting the flow area of wind flowing through the condensing part.
Preferably, each of the battery accommodating chambers is provided with a smoke sensor and a combustible gas sensor;
the thermal management control method further includes:
judging whether smoke exists in each battery accommodating cavity or not, and whether the content of combustible gas reaches a set threshold value or not;
and if smoke exists in any one of the battery accommodating cavities or the combustible gas content in any one of the battery accommodating cavities reaches the set threshold value, closing the air cooling system.
According to another aspect of the present invention, there is provided a thermal management control device of a compartmentalized energy storage system, the compartmentalized energy storage system including a prefabricated compartment and an air cooling system disposed in the prefabricated compartment, the prefabricated compartment having a plurality of battery accommodating chambers, each battery accommodating chamber being correspondingly provided with a battery cluster composed of a plurality of battery modules;
the thermal management control apparatus includes:
an acquisition module for acquiring the charge and discharge times of each battery module, the ambient temperature in each battery accommodating cavity and the average ambient humidity in the prefabricated cabin;
the determining module is used for determining the wind speed of the air cooling system corresponding to each battery module according to the charge and discharge times of each battery module, determining the wind temperature of the air cooling system corresponding to each battery cluster according to the ambient temperature in each battery accommodating cavity and determining the wind dampness of the air cooling system corresponding to the prefabricated cabin according to the average ambient humidity in the prefabricated cabin.
According to the invention, the wind speed of the air cooling system corresponding to each battery module is determined according to the charge and discharge times of each battery module, so that the modularized targeted adjustment is carried out on each battery module, the wind temperature of the air cooling system corresponding to each battery cluster is determined according to the ambient temperature in each battery accommodating cavity, the cluster-level wind temperature adjustment is carried out on each battery cluster, the wind-damp of the air cooling system corresponding to the prefabricated cabin is determined according to the average ambient humidity of the prefabricated cabin, and the cabin-level adjustment of the wind-damp of the prefabricated cabin is realized.
(III) beneficial effects
The technical scheme of the invention has the following beneficial technical effects:
the air cooling system can realize that the air cooling system carries out different control operations on the batteries in the prefabricated cabin at the module level, the cluster level and the cabin level, the charging and discharging times of each battery module are obtained, the wind speed of each battery module can be adjusted pertinently according to the actual service life condition of each battery module, the wind temperature of each battery corresponding to each battery cluster of the air cooling system is determined according to the ambient temperature in each battery accommodating cavity, the different wind temperature adjustment on each battery accommodating cavity can be realized, the condition that the temperature of a single battery is higher and the wind temperature cannot be reduced pertinently is avoided, the wind-cooling system corresponding to the wind-damp in the prefabricated cabin is determined according to the average ambient humidity in the prefabricated cabin, and the macroscopic adjustment of the cabin level is carried out through the ambient humidity in the prefabricated cabin, so that the humidity in the whole prefabricated cabin is in a proper range is ensured, the condition that the air temperature is unsuitable and the safety of the battery is influenced is avoided, and the safety of the whole energy storage system is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a compartmentalized energy storage system embodiment of the present invention;
FIG. 2 is a flow chart of a thermal management control method of an embodiment of a compartmentalized energy storage system of the present invention;
FIG. 3 is a schematic diagram of an embodiment of an air cooling system and battery module of a compartmentalized energy storage system of the present invention;
fig. 4 is a schematic structural diagram of a thermal management control device of an embodiment of a compartmentalized energy storage system of the present invention.
Reference numerals:
1. prefabricating a cabin; 11. a battery accommodating chamber; 12. a partition plate;
2. an air cooling system; 21. a heat radiation fan; 22. a fan; 23. an air duct; 24. an air valve; 25. a circulation passage; 26. a condensing part;
3. a control device;
4. a battery module;
5. a coolant line;
6. a housing; 6a, an inlet; 6b, an outlet;
7. a temperature sensor;
8. a humidity sensor.
Specific embodiments of the present invention have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The term "plurality" in embodiments of the present invention means two or more, and other adjectives are similar.
The method and the device are based on the same inventive concept, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.
The invention provides a thermal management control method and a device for a cabin-type energy storage system, which aim to realize the comprehensive control of a module level, a cluster level and a cabin level of the energy storage prefabricated cabin, improve the refrigeration effect of an air cooling system and improve the safety of the energy storage system.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a cabin-type energy storage system according to the present invention, where the cabin-type energy storage system includes a prefabricated cabin 1, an air cooling system 2 disposed in the prefabricated cabin 1, and a control device 3, where the control device 3 is connected to the air cooling system 2 and is capable of controlling cooling of the air cooling system 2, the prefabricated cabin 1 has a plurality of battery accommodating chambers 11, each battery accommodating chamber 11 is correspondingly provided with a battery cluster formed by a plurality of battery modules 4 (fig. 1 shows that each battery accommodating chamber 11 is formed by a plurality of battery modules 4 arranged in a height direction, and the control device 3 is connected to each battery module 4 and is capable of controlling charging and discharging of the battery modules 4.
Referring to fig. 2, fig. 2 is a flow chart of a thermal management control method of an embodiment of a compartmentalized energy storage system of the present invention, the thermal management control method comprising:
s1: the number of charge and discharge times of each battery module 4, the ambient temperature in each battery accommodation chamber 11, and the average ambient humidity in the prefabricated compartment 1 are acquired.
In the above, the number of charging and discharging times of each battery module 4 can be obtained through the control device 3, the ambient temperature in the corresponding battery accommodating cavity 11 can be obtained through the temperature sensor 7 arranged in each battery accommodating cavity 11, each temperature sensor 7 is communicated with the control module, the control module obtains the ambient temperature data of the temperature sensor 7, the ambient humidity of different positions can be obtained through the plurality of humidity sensors 8 arranged at different positions in the prefabricated cabin 1, each humidity sensor 8 is communicated with the control module, and the control module obtains the ambient humidity data of the humidity sensor 8.
S2: and determining the wind speed of the air cooling system 2 corresponding to each battery module 4 according to the charge and discharge times of each battery module 4.
In some embodiments, step S2 specifically includes:
the wind speed of each battery module 4 is determined according to the percentage of the charge and discharge times of each battery module 4 to the total charge and discharge times threshold value, wherein the higher the percentage of the charge and discharge times of the battery module 4 to the total charge and discharge times threshold value is, the higher the wind speed of the battery module 4 is.
Through repeated experiments, analysis and comparison, the number of times of charge and discharge of the battery module 4 is related to the service life of the battery and the stage temperature rise degree, and the more the number of times of charge and discharge of the battery module 4 is, the higher the temperature rise of the battery in each charge is, which also indicates that the service life of the battery is attenuated. Setting the total charge and discharge times of the battery module 4 as N times, and determining the wind speed of the air cooling system 2 corresponding to the battery module 4 as a first gear when the charge and discharge times are less than 25% N; when the charge and discharge times reach 25% N and do not reach 50% N, the wind speed of the air cooling system 2 corresponding to the battery module 4 is determined to be a second gear; when the charge and discharge times reach 50% N and do not reach 75% N, the wind speed of the air cooling system 2 corresponding to the battery module 4 is determined to be a third gear; when the number of charge and discharge reaches 75% n, the wind speed of the air cooling system 2 corresponding to the battery module 4 is determined as the fourth gear. In one possible scenario, the total charge-discharge number threshold of each battery module 4 is 4000 times, the charge-discharge number may be divided into 1000 times, 2000 times and 3000 times, the corresponding percentages are 25%, 50% and 75%, when the percentage of the charge-discharge number of each battery module 4 that is the total charge-discharge number threshold is less than 25%, the wind speed of the air cooling system 2 that is corresponding to the battery module 4 is determined as the first gear, when the percentage of the charge-discharge number of each battery module 4 that is the total charge-discharge number threshold is 25%, the wind speed of the air cooling system 2 that is corresponding to the battery module 4 is determined as the second gear, when the percentage of the charge-discharge number of each battery module 4 that is the total charge-discharge number threshold is 50%, the wind speed of the air cooling system 2 that is corresponding to the battery module 4 is determined as the third gear, when the percentage of the charge-discharge number of each battery module 4 that is the total charge-discharge number threshold is less than 75%, the wind speed of the air cooling system 2 that is corresponding to the battery module 4 is determined as the fourth gear, wherein the wind speed of the first gear is in the third gear is less than the specific gear, and the wind speed of the third gear is not limited to the third gear is performed.
It should be noted that, due to factors such as replacement and maintenance, even though the charge and discharge times of the battery modules 4 in the same battery cluster are different, different wind speeds can be determined according to different charge and discharge times to pointedly dissipate heat of different battery modules 4, so that the heat dissipation effect and the power consumption loss can be balanced, the situation that the power consumption is overlarge due to the fact that the uniform fan is adopted at a high rotating speed is avoided, the electric energy waste is caused, and the situation that the heat dissipation effect of part of the battery modules 4 is not good due to the fact that the uniform fan is adopted at a low rotating speed is avoided, and the safety of an energy storage system is influenced due to the fact that the temperature is too high is avoided.
S3: the air temperature of the air cooling system 2 corresponding to each battery cluster is determined according to the ambient temperature in each battery accommodating chamber 11.
In the above, by performing wind speed control on each battery module 4 and wind temperature control on each battery cluster, it is possible to achieve that each battery module 4 in the single battery housing chamber 11 has a suitable wind speed and wind temperature, for example, when the number of charge and discharge times of the first battery module 4 in the same battery cluster is greater than the number of charge and discharge times of the second battery module 4, the wind speed of the air cooling system 2 can be made to be greater for the first battery module 4 than for the second battery module 4, and based on the wind temperature control strategy specific to the battery cluster, the air cooling control strategy in the battery housing chamber 11 can perform not only point-to-point adjustment for each battery module 4 but also cluster-level adjustment between the module level and the cabin level for the battery cluster in the battery housing chamber 11 based on the ambient temperature. Compared with the whole macro-adjustment scheme based on the battery temperature in the prior art, the invention can realize different control strategies at the module level and the cluster level, and the controlled air cooling effect can be coordinated (namely, the module level refrigerating effect and the cluster level refrigerating effect aiming at each battery can jointly act), so as to ensure the refrigerating effect of each battery module 4.
In one possible embodiment, the manner of obtaining the ambient temperature inside each battery receiving chamber 11 includes: the ambient temperature within each battery accommodating chamber 11 is obtained by the ambient temperature detected by the temperature sensor 7 in each battery accommodating chamber 11.
In another possible embodiment, the manner of obtaining the ambient temperature inside each battery receiving chamber 11 includes: the ambient temperature in each battery housing chamber 11 is obtained by calculating an average value of the ambient temperatures detected by the plurality of temperature sensors 7 distributed at different positions in each battery housing chamber 11.
Alternatively, the ambient temperature in each battery accommodating cavity 11 may be obtained in real time by one temperature sensor 7 or a plurality of temperature sensors 7, so as to determine the air temperature of the air cooling system 2 corresponding to each battery cluster in real time according to the ambient temperature in each battery accommodating cavity 11. For example, if the ambient temperature in the battery housing chamber 11 obtained in real time is 40 ℃ and above, the air cooling system 2 corresponds to 8-12 ℃ of the ambient temperature of the battery housing chamber 11, if the ambient temperature in the battery housing chamber obtained in real time is 30-40 ℃, the air cooling system 2 corresponds to 12-15 ℃ of the ambient temperature of the battery housing chamber 11, if the ambient temperature in the battery housing chamber 11 obtained in real time is 20-30 ℃, the air cooling system 2 corresponds to 15-18 ℃ of the ambient temperature of the battery housing chamber 11, if the ambient temperature in the battery housing chamber 11 obtained in real time is 20 ℃ or below, the air cooling system 2 may not cool the battery housing chamber 11.
S4: and determining that the air cooling system 2 corresponds to the rheumatism in the prefabricated cabin 1 according to the average ambient humidity in the prefabricated cabin 1.
In the above, the steps S2, S3 and S4 are not limited to being performed sequentially, some steps may be performed in parallel, or the order may be exchanged, other steps may be included between the steps, and a plurality of sub-steps or stages may be included, and these sub-steps or stages are not necessarily performed at the same time, but may be performed at different times, and the order of their execution may not necessarily be performed sequentially, but may be performed alternately or alternately with at least a part of the sub-steps or stages of other steps or other steps.
In a preferred embodiment, as shown in fig. 1, the air cooling system 2 includes a cooling fan 21 disposed on each battery module 4, the control device 3 is connected to the cooling fan 21, the control device 3 controls the start and stop of the cooling fan 21 and the rotation speed adjustment, and the step S2 specifically includes: the rotation speed of the cooling fan 21 on each battery module 4 is determined according to the charge and discharge times of each battery module 4, and the wind speed of the target battery module 4 can be adjusted by controlling different rotation speeds of the cooling fan 21, so that the higher the rotation speed of the corresponding cooling fan 21 is, the higher the wind speed of the battery module 4 is.
In another preferred embodiment, referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of an air cooling system 2 and a battery module 4 of a nacelle energy storage system according to the invention, the air cooling system 2 includes a fan 22, a plurality of air channels 23 and a plurality of air valves 24, the fan 22 is communicated with the plurality of air channels 23, the air channels 23 are in one-to-one correspondence with the battery modules 4, and outlets 6b of the air channels 23 are aligned with the corresponding battery modules 4, the air valves 24 are disposed in the air channels 23 in one-to-one correspondence, that is, each battery module 4 has one air channel 23 corresponding to itself, the air valves 24 are disposed in the air channels 23 to control the opening of the air channels 23, the control device 3 is connected with the fan 22 and all the air valves 24, the control device 3 controls the start and stop of the fan 22 and the rotation speed to supply air to the air channels 23, the control device 3 controls the opening of the air channels 23 to determine the unit air quantity flowing to the corresponding battery module 4, so as to control the air speed, and the step S2 specifically includes: in the case that the fan 22 rotates, the opening degree of the air valve 24 in the air duct 23 corresponding to each battery module 4 is determined, and the air speed of the target battery module 4 can be adjusted by controlling different opening degrees of each air duct 23, so that the larger the opening degree of the corresponding air valve 24 is, the higher the air speed of the battery module 4 is.
Preferably, the battery module 4 includes a plurality of electric cells, and a certain interval is provided between the electric cells, and after the step S2, the thermal management control method of the present invention further includes:
acquiring a minimum interval d1 between the battery cells in each battery module 4 and an arrangement mode of the battery cells;
acquiring a minimum interval d2 between each battery module 4 and the battery module 4 adjacent thereto;
based on the minimum interval d1 between the battery cells in each battery module 4, the arrangement of the battery cells, and the minimum interval d2 between the battery modules 4 adjacent thereto, the wind speed of the air cooling system 2 corresponding to each battery module 4 determined according to the charge/discharge times of each battery module 4 is adjusted.
In the above, the wind speed V0 may be adjusted by the following formula, and V1 is the adjusted wind speed, specifically:
；
in the above-mentioned formula(s),for the cell arrangement correction factor, when all the cells of the battery module 4 are arranged in parallel (i.e., all the cells are aligned in the x-direction and the y-direction from the top view.)>The value is 1; when all the cells in the battery module 4 are arranged in a staggered manner (i.e., all the cells are aligned in the x-direction and two adjacent rows are staggered in the y-direction from a top view, two rows separated by one row are aligned in the y-direction, i.e., even rows are aligned in the y-direction, odd rows are aligned in the y-direction, and even rows and odd rows are staggered in the y-direction)>When all the cells in the battery module 4 are arranged in a cross manner (i.e., all the cells are aligned in the x-direction, several columns located in the middle of the y-direction, several columns located at both ends of the y-direction, and several columns located in the middle of the y-direction and several columns located at both ends of the y-direction are offset from each other in the y-direction) as viewed from the top, the value is 1.04>The value is 1.02%>Is constant, takes the value of 0.11, and d1 and d2 are expressed in millimeters (mm), and are only taken during calculationd1 and d 2.
In some possible embodiments, the battery accommodating chambers 11 are separated by a partition plate 12, a cooling liquid pipeline 5 is arranged on one side of the partition plate 12 facing each battery accommodating chamber 11, and wind supplied by the wind cooling system 2 to each battery accommodating chamber 11 flows through the cooling liquid pipeline 5. In practical application, the cooling liquid pipeline 5 can be arranged on one surface of the partition plate 12, so that each partition plate 12 is provided with the cooling liquid pipeline 5 towards one of the battery accommodating cavities 11, and the cooling liquid pipeline 5 can be arranged on both surfaces of the partition plate 12, so that each partition plate 12 is provided with the cooling liquid pipeline 5 towards the two battery accommodating cavities 11 separated by the partition plate 12.
Preferably, the cooling liquid pipeline 5 is enclosed in the housing 6, the housing 6 has an inlet 6a communicating with the air cooling system 2 and a plurality of outlets 6b, each outlet 6b corresponds to one or more battery modules 4, or the plurality of outlets 6b corresponds to one battery module 4, and the air blown by the air cooling system 2 is blown to the battery modules 4 through the inlet 6a of the housing 6, the cooling liquid pipeline 5 and the plurality of outlets 6b of the housing 6 in sequence, so as to dissipate heat from the battery modules 4.
The step S3 specifically includes: the air temperature of each battery cluster is determined by determining the flow rate of the cooling liquid in the corresponding cooling liquid pipeline 5 according to the ambient temperature in each battery accommodating cavity 11, and the temperature difference between the inlet 6a and the plurality of outlets 6b of the shell 6 can be controlled by controlling the flow rate of the cooling liquid in the cooling liquid pipeline 5, so that the air temperature flowing to the battery clusters is controlled; the higher the ambient temperature in the battery accommodating chamber 11 is, the higher the coolant flow rate in the corresponding coolant line 5 is, and the air temperature of the air cooling system 2 for each battery cluster is adjusted by controlling the coolant flow rate in the coolant line 5. The larger the temperature difference between the inlet 6a and the plurality of outlets 6b of the housing 6 is, the lower the air temperature flowing to the battery cluster is, when the flow rate of the coolant in the coolant line 5 is higher, the smaller the temperature difference between the inlet 6a and the plurality of outlets 6b of the housing 6 is, the higher the air temperature flowing to the battery cluster is, the specific formula is:
；
in the above formula, delta Ta is the inlet-outlet temperature difference of the shell 6, ma is the air flow between the inlet and the outlet of the shell 6, cpa is the air specific heat capacity, mc is the cooling liquid flow, cpc is the cooling liquid specific heat capacity, delta Tc is the cooling liquid inlet-outlet temperature difference,is a refrigerating capacity correction coefficient (which is related to the material of the cooling liquid pipeline and the pipeline wall thickness, the better the heat conduction performance of the pipeline material is, < >>The larger the wall thickness of the pipeline is, the smaller the wall thickness is>Larger) and +.>The value range is 0.9-0.98.
It is further preferred that the ambient temperature in each battery compartment 11 is also corrected, for example, when the temperature of each battery compartment 11 is detected by the temperature sensor 7, according to the distance between each battery compartment 11 and the initial air supply position of the air cooling system 2 (which may correspond to the outlet position of the fan/fan in the air cooling system 2 in the present invention), i.e. the product of the ambient temperature detected by the battery compartment 11 and the correction factor is used as the basis for determining the ambient temperature of the air temperature of each battery cluster of the air cooling system 2, i.e. t=at 0, where T is the ambient temperature of the air temperature of each battery cluster corresponding to the air cooling system 2, T0 is the ambient temperature actually detected by the temperature sensor 7 in each battery compartment 11, and a is the correction factor, where the correction factor a is positively correlated with the distance between each battery compartment 11 and the initial air supply position of the air cooling system 2 in the air supply path, i.e. the greater distance between the battery compartment 11 and the initial air supply position of the air cooling system 2 in the air supply path is greater, i.e. the greater battery compartment 11 compensates for the greater battery temperature of the air cooling system than the battery cluster 11, and thus determines the higher cooling effect on the air cooling system than the ambient temperature.
In practical application, further reference may be made to the number of inflection points on the air supply path of the air cooling system 2 for each battery accommodating cavity 11, where the formula is:
T=（a+0.2b）T0；
t is the ambient temperature for determining the air temperature of the air cooling system 2 for each battery cluster, T0 is the ambient temperature actually detected by the temperature sensor 7 in each battery accommodating cavity 11, a is a correction coefficient, a is a positive correlation between the correction coefficient a and the distance between each battery accommodating cavity 11 and the initial air supply position of the air cooling system 2 on the air supply path, b is the number of inflection points on the air supply path of the air cooling system 2 corresponding to each battery accommodating cavity 11, for example, when the number of inflection points on the air supply path is larger, the air supply loss is larger, and further compensation is needed for the temperature T0.
In some preferred embodiments, a plurality of humidity sensors 8 are disposed in the prefabricated cabin 1, at least one humidity sensor 8 is disposed in each battery accommodating cavity 11, and the humidity sensor 8 in the prefabricated cabin 1 is greater than the sum of the humidity sensors 8 in all the battery accommodating cavities 11, that is, besides the humidity sensors 8 in the battery accommodating cavities 11, other chambers for placing the air cooling system 2 and the control device 3 may be also disposed with the humidity sensors 8, which is not limited in this invention.
The step S4 specifically includes: the wind-cooling system 2 determines the wind-dampness of the prefabricated cabin 1 according to the average value of the environmental humidity detected by all the humidity sensors 8 in the prefabricated cabin 1, and the humidity detected by the plurality of humidity sensors 8 reflects the humidity of the whole prefabricated cabin 1 in such a control mode, so that macroscopic humidity regulation and control are convenient.
As another preferable case, the step S4 specifically includes: correcting the ambient humidity detected by all humidity sensors 8 in the prefabricated cabin 1, and determining the rheumatism of the air cooling system 2 in the prefabricated cabin 1 according to the average value of the corrected ambient humidity, wherein the specific formula is as follows:
；
where H is the average value of the corrected ambient humidity, HX is the ambient humidity detected by the humidity sensor 8 in the battery accommodating chamber 11, m is the number of the humidity sensors 8 in the battery accommodating chamber 11, HY is the ambient humidity detected by the humidity sensor 8 in the prefabricated cabin 1 but not in the battery accommodating chamber 11, n is the number of the humidity sensors 8 in the prefabricated cabin 1 but not in the battery accommodating chamber 11, c and d are both humidity correction coefficients, 1 < c.ltoreq. 1.05,1.1.ltoreq.d.ltoreq.1.2, HZ is a humidity correction parameter, which is related to the setting position of the air cooling system 2, cold air subsidence plus fan 22/fan action can be quickly entered into the battery accommodating chamber 11 when the air cooling system 2 is located at the upper part of the prefabricated cabin 1, HZ has a value of 1-2% RH when the air cooling system 2 is located at the lower part of the prefabricated cabin 1, the blowing force of the blower/fan 22 needs to overcome the sinking action of the cold air to make the cold air enter the battery accommodating cavity 11 at a relatively low speed, the value of HZ is 3-5% rh, in the above-mentioned method, a line formed by all midpoints of the prefabricated cabin 1 in the height direction is taken as a dividing line, the position of the air cooling system 2 at the upper part of the prefabricated cabin 1 is that the air cooling system 2 is located above the dividing line, the position of the air cooling system 2 at the lower part of the prefabricated cabin 1 is that the air cooling system 2 is located below the dividing line, in the structure of the embodiment of the invention, the battery accommodating cavity 11 is far away from the air cooling system 2, the ambient humidity detected by the humidity sensor 8 in the battery accommodating cavity 11 is less affected by the refrigerating and dehumidifying effects of the air cooling system 2, the accommodating cavities except the battery accommodating cavity 11 are near to the air cooling system 2, the ambient humidity detected by the humidity sensor 8 is greatly influenced by the refrigerating and dehumidifying effects of the air cooling system 2, and the real condition of the humidity in the prefabricated cabin 1 can be reflected more comprehensively and accurately through the humidity compensation mode.
In some possible embodiments, the air cooling system 2 includes a circulation channel 25 and a condensation component 26 disposed in the circulation channel 25, the flow area of the condensation component 26 is set to be adjustable, the wind-damp in the prefabricated cabin 1 is adjusted by adjusting the flow area of the wind flowing through the condensation component 26, specifically, the condensation component 26 can be moved by a linear motor, a rotating motor plus a rack-and-pinion pair or a rotating motor plus a screw pair, so as to adjust the flow area of the condensation component 26 in the circulation channel 25, the condensation component 26 can use a condensation plate or a condensation grid with holes, etc., of course, the condensation component 26 can also be set to be arc-shaped, the circulation channel 25 has an arc-shaped track for the condensation component 26 to move, and the condensation component 26 can be driven by a rotating driving component to move in the circulation channel 25.
Preferably, a smoke sensor and a combustible gas sensor are provided in each battery accommodation chamber 11; the thermal management control method of the present invention further includes: judging whether smoke exists in each battery accommodating cavity 11 or whether the content of combustible gas reaches a set threshold value; if smoke exists in any battery accommodating cavity 11 or the content of combustible gas in any battery accommodating cavity 11 reaches a set threshold value, the air cooling system 2 is closed, namely, when smoke exists in the battery accommodating cavity 11 or the content of the combustible gas exceeds a standard, the air cooling system 2 is closed at the moment, the air cooling system 2 is prevented from blowing and supporting combustion, in this case, the air cooling system 2 can be controlled through a control device 3 in the prefabricated cabin 1, or the control device 3 of the cabin-type energy storage system is provided with a plurality of cabin-type energy storage systems, the central controller can perform centralized control on each prefabricated cabin 1, and when a certain prefabricated cabin 1 has a battery firing risk, centralized control is performed through the central controller, so that system-level thermal management and control are realized, in this case, the whole system can realize different thermal management and control strategies of module levels, cabin levels and system levels for batteries in the prefabricated cabin 1, the system level can realize the safety management and control of smoke and the combustible gas in each prefabricated cabin 1, or the cabin level can realize the same temperature and control strategy of each battery cabin 1, for example, the air speed and the air speed can realize the same level and the air speed control strategy can realize the same as that the air speed control of the module level 11 can realize the air speed control of each battery level.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a thermal management control device of an embodiment of a cabin-type energy storage system according to the present invention, where the cabin-type energy storage system includes a prefabricated cabin 1 and an air cooling system 2 disposed in the prefabricated cabin 1, and the prefabricated cabin 1 has a plurality of battery accommodating cavities 11, and each battery accommodating cavity 11 is correspondingly provided with a battery cluster formed by a plurality of battery modules 4; the thermal management control device includes:
an acquisition module for acquiring the number of charge and discharge times of each battery module 4, the ambient temperature in each battery accommodation chamber 11, and the average ambient humidity in the prefabricated compartment 1;
the determining module is used for determining the wind speed of the air cooling system 2 to each battery module 4 according to the charge and discharge times of each battery module 4, determining the wind temperature of the air cooling system 2 to each battery cluster according to the ambient temperature in each battery accommodating cavity 11 and determining the wind-damp of the air cooling system 2 to the prefabricated cabin 1 according to the average ambient humidity in the prefabricated cabin 1.
It should be noted that, the above device provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.
It should be noted that, in the embodiment of the present invention, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.
The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention.
It should be noted that, the above device provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.
The terms "first," "second," "third," "fourth," and the like in the description of the invention and in the above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (7)
1. The thermal management control method of the cabin-type energy storage system is characterized in that the cabin-type energy storage system comprises a prefabricated cabin and an air cooling system arranged in the prefabricated cabin, the prefabricated cabin is provided with a plurality of battery accommodating cavities, battery clusters formed by a plurality of battery modules are correspondingly arranged in each battery accommodating cavity, the battery accommodating cavities are separated by a partition plate, a cooling liquid pipeline is arranged on one side of the partition plate, facing each battery accommodating cavity, of each battery accommodating cavity, wind provided by the air cooling system for each battery accommodating cavity flows through the cooling liquid pipeline, a plurality of humidity sensors are arranged in the prefabricated cabin, at least one humidity sensor is arranged in each battery accommodating cavity, and the number of the humidity sensors in the prefabricated cabin is larger than the sum of the numbers of the humidity sensors in all the battery accommodating cavities;
the thermal management control method includes:
acquiring the charge and discharge times of each battery module, the ambient temperature in each battery accommodating cavity and the average ambient humidity in the prefabricated cabin;
determining the wind speed of each battery module according to the percentage of the charge and discharge times of each battery module to the total charge and discharge times threshold value, wherein the higher the percentage of the charge and discharge times of each battery module to the total charge and discharge times threshold value is, the higher the wind speed of each battery module is;
determining the wind temperature of each battery cluster by determining the flow rate of the cooling liquid in the corresponding cooling liquid pipeline according to the ambient temperature in each battery accommodating cavity, wherein the higher the ambient temperature in the battery accommodating cavity is, the higher the flow rate of the cooling liquid in the corresponding cooling liquid pipeline is;
and determining the rheumatism of the air cooling system in the prefabricated cabin according to the average value of the ambient humidity detected by all the humidity sensors in the prefabricated cabin.
2. The method of claim 1, wherein the air cooling system includes a cooling fan provided on each of the battery modules,
the step of "determining the wind speed of each of the battery modules" specifically includes:
a rotational speed of the cooling fan on each of the battery modules is determined.
3. The thermal management control method according to claim 1, wherein the air cooling system includes a fan, a plurality of air ducts, and a plurality of air valves, the fan being in communication with the plurality of air ducts, the air ducts being in one-to-one correspondence with the battery modules and outlets of the air ducts being aligned with the corresponding battery modules, the air valves being disposed in one-to-one correspondence in the air ducts;
the step of "determining the wind speed of each of the battery modules" specifically includes:
and under the condition that the fan rotates, determining the opening degree of the air valve in the air duct corresponding to each battery module.
4. The thermal management control method of claim 1, wherein the means for obtaining the ambient temperature within each of the battery receiving chambers comprises:
and calculating an average value of the ambient temperatures detected by a plurality of temperature sensors distributed at different positions in each battery accommodating cavity to obtain the ambient temperature in each battery accommodating cavity.
5. The method according to claim 1, wherein the air cooling system includes a circulation passage and a condensing part provided in the circulation passage, a flow area of the condensing part is set to be adjustable, and the rheumatism in the prefabricated cabin is adjusted by adjusting a flow area of the air flowing through the condensing part.
6. The thermal management control method according to claim 1, wherein a smoke sensor and a flammable gas sensor are provided in each of the battery accommodation chambers;
the thermal management control method further includes:
judging whether smoke exists in each battery accommodating cavity or not, and whether the content of combustible gas reaches a set threshold value or not;
and if smoke exists in any one of the battery accommodating cavities or the combustible gas content in any one of the battery accommodating cavities reaches the set threshold value, closing the air cooling system.
7. A thermal management control apparatus for a compartmentalized energy storage system employing the thermal management control method of a compartmentalized energy storage system as recited by any of claims 1 to 6, wherein,
the thermal management control apparatus includes:
an acquisition module for acquiring the charge and discharge times of each battery module, the ambient temperature in each battery accommodating cavity and the average ambient humidity in the prefabricated cabin;
the determining module is used for determining the wind speed of the air cooling system corresponding to each battery module according to the charge and discharge times of each battery module, determining the wind temperature of the air cooling system corresponding to each battery cluster according to the ambient temperature in each battery accommodating cavity and determining the wind dampness of the air cooling system corresponding to the prefabricated cabin according to the average ambient humidity in the prefabricated cabin.
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