CN116544563A - Thermal management control system, method, equipment and medium of battery energy storage device - Google Patents
Thermal management control system, method, equipment and medium of battery energy storage device Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000033228 biological regulation Effects 0.000 claims abstract description 12
- 238000011217 control strategy Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 5
- 238000005192 partition Methods 0.000 abstract description 5
- 238000004422 calculation algorithm Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000000638 solvent extraction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- 230000008859 change Effects 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 229910001416 lithium ion Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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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
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- Secondary Cells (AREA)
Abstract
The application discloses a thermal management control system, a method, equipment and a medium of a battery energy storage device, which realize independent partition control of each battery cluster refrigeration and an air duct wind field and a temperature field through a distributed air conditioner refrigeration design, and on the basis, provide a battery cluster layered partition control method based on 'Battery Management Unit (BMU) +battery cluster management unit (BCMU)', realize dynamic and differential regulation of fan wind speed in a battery cluster through an intelligent algorithm, remarkably improve the thermal management effect of the battery cluster, furthest reduce the maximum temperature difference, and simultaneously reduce the thermal management power consumption of the battery cluster and improve the energy efficiency of the whole battery energy storage device through the optimization control of the control strategy while guaranteeing the consistency of batteries to the greatest extent. Therefore, the problem that the temperature difference consistency control effect of the battery modules in the cluster is poor in the prior art is solved.
Description
Technical Field
The present disclosure relates to the field of power energy storage technologies, and in particular, to a thermal management control system, a method, an apparatus, and a medium for a battery energy storage device.
Background
At present, the heat management of the lithium ion battery energy storage system for electric power energy storage is mainly divided into three types of air cooling battery heat dissipation, liquid cooling battery heat dissipation and battery heat dissipation based on phase change materials, wherein the air cooling battery heat dissipation is the most extensive and the highest in duty ratio. In the integrated application of a large-capacity box-type energy storage battery system, the heat dissipation of an air-cooled battery is mainly realized by adopting the technical scheme of forced heat exchange by combining industrial air-conditioning refrigeration and air supply with a fan, and the integrated design of the system is divided into two modes of centralized air-conditioning refrigeration and distributed air-conditioning refrigeration.
In the existing scheme, whether the air conditioner is used for refrigerating a centralized air conditioner or a distributed air conditioner, the equalization of the air speed, the air temperature and the air quantity of the cold air inlets of each battery cluster and each battery module in the box-type energy storage battery system is realized by optimizing the design of an air duct, but the air duct is often limited by the structural characteristics, so that the temperature difference control effect is poor; meanwhile, the influence of the fan speed of each battery module in the battery cluster on the flow field and the temperature field in the vertical air channel direction is not fully considered, the flow field and the temperature field of the vertical air channel are changed, the air inlet quantity and the air temperature of each battery module air channel are possibly changed, the change of the highest temperature and the temperature difference of the battery unit is further influenced, and the difficulty of temperature balance control is increased. Further, in terms of control algorithm design, the start-stop temperature threshold value of each battery module fan is an inherent parameter determined during initial configuration, and cannot be dynamically adjusted according to the temperature rise and temperature difference conditions of the battery in the actual charge and discharge process, so that the temperature difference is possibly overlarge; and the fan wind speed control algorithm of the battery modules in the battery cluster is too simple and ideal, so that the consistency control effects of actual temperature rise, temperature difference and the like are poor.
Disclosure of Invention
The application provides a thermal management control system, a thermal management control method, thermal management control equipment and a thermal management control medium for a battery energy storage device, which are used for solving the problem that the temperature difference consistency control effect of battery modules in a cluster is poor in the prior art.
In view of this, a first aspect of the present application provides a thermal management control system for a battery energy storage device, the system comprising: a plurality of battery modules, a high-pressure box, an industrial air conditioner, a top air duct and a vertical air duct;
wherein, a plurality of battery modules form a battery cluster, and a plurality of battery clusters form a battery array;
the battery module includes: a plurality of battery cells, a battery management unit BMU, a fan and a voltage and temperature acquisition unit; the high-pressure tank comprises: a battery cluster management unit BCMU; the plurality of BCMUs are managed and controlled by a battery array management unit BAMU;
the battery modules are arranged on the battery cluster frame in a row and are vertically distributed; the air outlet of the industrial air conditioner is in butt joint with the air inlet of the top air duct, cold air blown out by the industrial air conditioner enters the vertical air duct after passing through the top air duct, and an air outlet hole is formed in the air inlet of each layer of the battery module;
the voltage and temperature acquisition unit in the BMU acquires the operation parameters of the battery monomers in the battery module, uploads the operation parameters to the BCMU, and then the BCMU uploads the operation parameters to the BAMU, so that the BAMU acquires the battery operation state data in a control area, and further, the BAMU is used for configuring the parameters and issuing the parameters to the BMU; the BMU controls the wind speed of the fan according to the configuration parameters and a preset control strategy, and receives a state signal sent by the fan to monitor the state of the fan.
Optionally, inside the battery module, the BMU is connected with the fan through a control cable and a state feedback cable, the pulse width modulation wave PWM output by the BMU regulates and controls the rotation speed of the fan through the control cable, and the BMU receives a state signal sent by the fan through the state feedback cable, so as to monitor the state of the fan.
A second aspect of the present application provides a thermal management control method of a battery energy storage device, applied to the thermal management control system of the battery energy storage device of the first aspect, the method including:
s1, acquiring the cell temperature of each battery module in a battery cluster by BCMU, and determining the highest temperature, the lowest temperature and the maximum temperature difference of each battery module;
s2, the BCMU carries out temperature zone numbering on the battery modules according to the air channels of the battery clusters and the arrangement positions of the battery modules to obtain a plurality of temperature zones;
s3, the BCMU carries out weighted average on the highest temperature in the battery cluster to obtain an adjusting temperature reference value of the fan, wherein the weighted coefficient is determined by a temperature zone where the battery module is located;
s4, the BCMU transmits the temperature regulation reference value to each dynamic temperature zone, so that the BMU compares the highest temperature of each battery module with the temperature regulation reference value, and adjusts the fan wind speed in real time according to a comparison result;
s5, the BMU compares the highest temperature of the battery module with the preset stop temperature of the fan in real time, when the highest temperature is smaller than the preset stop temperature, the fan is controlled to stop, the fan state is monitored, and when the fan state is running, a fault state signal is uploaded to the BAMU through the BCMU, so that the BAMU gives an alarm.
Optionally, step S1 further includes:
acquiring the cell temperature of each battery module through a temperature acquisition unit, and determining the highest temperature;
the BMU compares the highest temperature with a preset starting temperature of the fan, when the highest temperature is higher than the preset starting temperature, the fan is controlled to start, the running state of the fan is monitored, and when the fan state is stopped, a fault state signal is uploaded to the BAMU through the BCMU, so that the BAMU gives an alarm.
Optionally, the BMU compares the highest temperature of each battery module with the reference value of the adjustment temperature, and adjusts the fan wind speed in real time according to the comparison result, which specifically includes:
the BMU compares the highest temperature of each battery module with the regulating temperature reference value, and if the highest temperature is higher than 1 ℃, the wind speed of the fan is increased by one step, so that the duty ratio of the fan speed regulating PWM wave is increased by 10%; when the wind speed is increased and the temperature of the battery core is reduced, the duty ratio of the PMW is reduced, and balanced consistency control is realized.
A third aspect of the present application provides a thermal management control apparatus for a battery energy storage device, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the steps of the method for controlling thermal management of the battery energy storage device according to the second aspect according to the instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for executing the thermal management control method of the battery energy storage device according to the second aspect.
From the above technical scheme, the application has the following advantages:
1. the influence of the wind speed of each battery module fan in the battery cluster on the flow field and the temperature field in the vertical air channel direction is fully considered, the secondary dynamic adjustment of the wind quantity, the wind speed and the wind temperature of the air inlet of the battery module of the whole cluster can be realized through the dynamic adjustment of the wind speed of the fan coordinated control of the battery module of the whole cluster, the influence on the wind quantity and the wind speed of the air channel in the isolated start-stop control of each battery module fan is avoided, and the temperature difference of the batteries in the cluster is reduced.
2. The physical position characteristics of the distribution of the battery modules in the cluster are fully considered for temperature partitioning, the partitioning benefits are realized, when the temperature reference is regulated by the fan speed of the battery modules in the cluster, the coefficient of the battery modules in the weighted average solving is reduced for the areas with rapid temperature rise and high temperature, so that the corresponding fan speed is increased, the highest temperature of the battery modules is reduced, and the integral temperature difference is reduced.
3. On the basis of not increasing the cost of a monitoring device and a system, the two-stage monitoring unit based on BCMU+BMU realizes dynamic differential regulation of the fan speed of the battery module in the air-cooled battery cluster, can effectively reduce the temperature difference of the battery in the cluster, ensures the running consistency of the battery in the cluster, and reduces the thermal management power consumption of the battery cluster.
Drawings
Fig. 1 is a schematic structural diagram of a thermal management control system of a battery energy storage device according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram illustrating communication connection of a thermal management control system of a battery energy storage device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a thermal management control system of a battery energy storage device according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Referring to fig. 1, a thermal management control system of a battery energy storage device provided in an embodiment of the present application includes: a plurality of battery modules, a high-pressure box, an industrial air conditioner, a top air duct and a vertical air duct; wherein, a plurality of battery modules form a battery cluster, and a plurality of battery clusters form a battery array;
the battery module includes: a plurality of battery cells, a battery management unit BMU, a fan and a voltage and temperature acquisition unit; the high-pressure tank includes: a battery cluster management unit BCMU; the plurality of BCMUs are managed and controlled by a battery array management unit BAMU;
the battery modules are arranged on the battery cluster frame in a row and are vertically distributed; an air outlet of the industrial air conditioner is in butt joint with an air inlet of the top air channel, cold air blown out by the industrial air conditioner enters the vertical air channel after passing through the top air channel, and an air outlet hole is formed in the vertical air channel at the air inlet of each layer of battery module;
it should be noted that, the industrial air conditioner, the top air duct and the vertical air duct form an external refrigeration system of the battery module and a pipeline thereof. When the battery module fan is started, cold air of the external pipeline is sucked into the battery module under the action of wind pressure, the cold air exchanges heat with the surface of the battery cell, and hot air after heat exchange is blown out by the fan.
The voltage and temperature acquisition unit in the BMU acquires the operation parameters of the battery monomers in the battery module, uploads the operation parameters to the BCMU, and then the BCMU uploads the operation parameters to the BAMU, so that the BAMU acquires the battery operation state data in the control area, and further, the BAMU is used for configuring the parameters and issuing the parameters to the BMU; the BMU controls the fan wind speed according to the configuration parameters and a preset control strategy, and receives a state signal sent by the fan to monitor the state of the fan.
It should be noted that, a schematic diagram of communication connection of the battery modules in the battery cluster is shown in fig. 2, in the battery cluster, BMUs of a plurality of battery modules communicate with BCMU units of a high-voltage box in the cluster through a CAN bus, and battery data and state information collected by the BMUs are uploaded. Inside the battery module, a control cable is connected between the BMU and the fan and a state feedback cable is connected, the control cable is used for regulating and controlling the rotating speed of the fan by Pulse Width Modulation (PWM) output by the BMU, and the BMU receives a state signal sent by the fan by the state feedback cable to monitor the state of the fan.
And a plurality of battery clusters form a battery array (battery stack), BCMU units of the high-voltage boxes of the battery clusters are also connected with the BAMU through a CAN bus, the BCMU uploads battery data, state information and the like in the clusters to the BAMU, and the BAMU CAN issue configuration parameters and protection action instructions. The BAMU is installed in a local monitoring cabinet of the battery energy storage system.
The fan wind speed of the battery module is controlled by Pulse Width Modulation (PWM) waves output by the BMU, and the running state of the fan is fed back to the BMU, so that the BMU can identify the running and stopping states of the fan, and the fault identification of the fan is facilitated. The BMU collects the temperature of the battery monomer, compares the highest temperature with the fan starting value received by the BMU, and adjusts the PMW according to a certain control rule so as to change the wind speed of the fan.
The embodiment of the application provides a battery energy storage device's thermal management control system, be equipped with distributed industry air conditioner, top wind channel, vertical wind channel, battery module's temperature acquisition unit, battery module embeds fan, battery module battery management unit, high-pressure tank and built-in BCMU unit, battery array management unit BAMU and constitute. According to the system, physical partitioning is carried out on the battery cluster battery modules according to the distribution condition of the flow field and the temperature field in the system design simulation result, after the physical partitioning, the layered partitioning dynamic regulation control method and the PWM adjustable speed characteristic of the fans are combined, so that the secondary dynamic regulation of the air quantity, the air speed and the air temperature of the air inlets of the whole battery modules is truly realized, the influence on the non-uniformity of the air quantity and the air speed of the air channels when the fans of all the battery modules are independently started and stopped is avoided, and the guarantee is provided for the temperature rise and the temperature difference consistency control when the battery modules are charged and discharged.
The foregoing is a thermal management control system of a battery energy storage device provided in an embodiment of the present application, and the following is a thermal management control method of a battery energy storage device provided in an embodiment of the present application.
Referring to fig. 2, a thermal management control method of a battery energy storage device provided in an embodiment of the present application includes:
step 201, BCMU obtains the cell temperature of each battery module in the battery cluster, and determines the highest temperature, the lowest temperature and the maximum temperature difference of each battery module;
the BCMU obtains the cell temperature of each battery module in the cluster and obtains the highest temperature Tk of each battery module by communication max Minimum temperature Tk min Maximum temperature difference delta T k 。
202, performing temperature zone numbering on the battery modules according to the arrangement positions of the air channels of the battery clusters and the battery modules by the BCMU to obtain a plurality of temperature zones;
the BCMU numbers the temperature zones of the battery modules according to the arrangement positions of the battery cluster air channels and the battery modules, and the number of the temperature zones is not less than 2.
Step 203, the BCMU performs weighted averaging on the highest temperature in the battery cluster to obtain an adjusted temperature reference value of the fan, wherein the weighted coefficient is determined by the temperature zone where the battery module is located;
the BCMU weights and averages the highest temperatures of the battery modules in the cluster to obtain the temperature adjustment reference value of the fan.
The weighting coefficient is determined by the temperature region where the battery module is located, and the weighting coefficient is marked as lambda 1 、λ 2 、λ 3 …, wherein lambda k And less than or equal to 1, wherein the weighted average calculation formula is as follows:
T adj ＝(T 1max *λ 1 +T 2max *λ 2 +T 3max *λ 3 +...+T kmax *λ k )/k
step 204, the BCMU transmits the temperature regulation reference value to each dynamic temperature zone, so that the BMU compares the highest temperature of each battery module with the temperature regulation reference value, and adjusts the fan wind speed in real time according to the comparison result;
it should be noted that BCMU issues dynamic zone fan adjustment temperature reference value T adj Maximum temperature and T of each battery module adj For comparison, every time the temperature is higher than 1 degree celsius (the decimal is rounded off in a rounding way), the fan is turned up by one gear, the duty ratio of the fan speed-regulating PWM wave output by the battery module BMU is increased by 10%, and the maximum duty ratio of the PMW is 100%. As the wind speed increases, the duty ratio of the PMW correspondingly decreases when the temperature of the battery core decreases, thereby realizing balanced consistency control and reducing the power consumption of the thermal management system.
Step 205, the BMU compares the maximum temperature of the battery module with a preset stop temperature of the fan in real time, when the maximum temperature is less than the preset stop temperature, controls the fan to stop, monitors the fan state, and when the fan state is running, uploads a fault state signal to the BAMU through the BCMU, so that the BAMU gives an alarm.
The BMU compares the maximum temperature of the battery module with the stop temperature of the fan in real time, and if the maximum temperature Tk is max At a stop temperature T or less end Stopping the fan and setting D k =0, and the fan status flag is set to 0; detecting the running state of the fan, and if the feedback state of the fan is stopped at the moment, indicating that the fan runs normally; if the fan feedback state is running at this time, indicating that the fan is faulty, uploading a fault state signal to the BAMU through the BCMU, so that the BAMU sends an alarm.
In one embodiment, the method for controlling thermal management of a battery energy storage device of the present application further comprises:
acquiring the cell temperature of each battery module through a temperature acquisition unit, and determining the highest temperature;
in the initial state, the start temperature T of the fan is set by the BAMU start And stop temperature T end The BCMU is issued through the CAN communication loop, and then the BCMU is issued to the BMU;
the BMU in each battery module monitors the temperature of each battery cell in the battery module in real time through a temperature acquisition unit, and identifies the highest temperature.
The BMU compares the highest temperature with the preset starting temperature of the fan, when the highest temperature is larger than the preset starting temperature, the fan is controlled to start, the running state of the fan is monitored, and when the fan state is stopped, a fault state signal is uploaded to the BAMU through the BCMU, so that the BAMU gives an alarm.
It should be noted that the BMU sets the highest temperature of the battery cell of the battery module and the fan start temperature T of the BMU in the battery module start And comparing, if the highest temperature of the battery core of the battery module is greater than or equal to the fan starting temperature, starting the fan, setting a Pulse Width Modulation (PWM) wave (D) for driving the fan to regulate speed by the BMU output, taking 50% of an initial starting value D, and setting a fan state flag to be 1.
Detecting the running state of the fan, and if the feedback state of the fan is running at the moment, indicating that the fan runs normally; if the feedback state of the fan is stopped at the moment, indicating that the fan is faulty, sending the fault state to the BCMU, sending the BAMU through the BCMU, and sending an alarm.
According to the thermal management control method of the battery energy storage device, on the basis of realizing independent partition control of refrigeration and air duct wind fields and temperature fields of each battery cluster, the influence on flow fields and temperature fields of an air duct after the action of a battery module fan is considered, the identification of the highest temperature of each battery module in the cluster is realized through BCMU based on module battery temperature data acquired by BMU, a reference temperature value is calculated through a weighted average method considering temperature partition coefficients, balanced dynamic regulation of the layered partition temperature of the battery cluster with the dual-stage coordination of BCMU and BMU is really realized, 5-level block regulation is set through the difference value between the highest temperature and the reference temperature, the thermal management effect of the battery cluster is remarkably improved, the maximum temperature difference is reduced to the greatest extent, and the thermal management power consumption of the battery cluster is reduced while the consistency of the battery cluster is guaranteed to the greatest extent.
Further, in an embodiment of the present application, there is provided a thermal management control apparatus for a battery energy storage device, where the apparatus includes a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the steps of the method for controlling thermal management of the battery energy storage device according to the method embodiment according to the instructions in the program code.
Further, in the embodiments of the present application, there is also provided a computer readable storage medium for storing a program code for executing the method described in the above method embodiments.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described 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 embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application 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 to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (7)
1. A thermal management control system for a battery energy storage device, comprising: a plurality of battery modules, a high-pressure box, an industrial air conditioner, a top air duct and a vertical air duct;
wherein, a plurality of battery modules form a battery cluster, and a plurality of battery clusters form a battery array;
the battery module includes: a plurality of battery cells, a battery management unit BMU, a fan and a voltage and temperature acquisition unit; the high-pressure tank comprises: a battery cluster management unit BCMU; the plurality of BCMUs are managed and controlled by a battery array management unit BAMU;
the battery modules are arranged on the battery cluster frame in a row and are vertically distributed; the air outlet of the industrial air conditioner is in butt joint with the air inlet of the top air duct, cold air blown out by the industrial air conditioner enters the vertical air duct after passing through the top air duct, and an air outlet hole is formed in the air inlet of each layer of the battery module;
the voltage and temperature acquisition unit in the BMU acquires the operation parameters of the battery monomers in the battery module, uploads the operation parameters to the BCMU, and then the BCMU uploads the operation parameters to the BAMU, so that the BAMU acquires the battery operation state data in a control area, and further, the BAMU is used for configuring the parameters and issuing the parameters to the BMU; the BMU controls the wind speed of the fan according to the configuration parameters and a preset control strategy, and receives a state signal sent by the fan to monitor the state of the fan.
2. The thermal management control system of a battery energy storage device according to claim 1, wherein inside the battery module, a BMU is connected with the fan through a control cable and a state feedback cable, the pulse width modulation wave PWM output by the BMU regulates the rotation speed of the fan through the control cable, and the BMU receives a state signal sent by the fan through the state feedback cable to monitor the state of the fan.
3. A method of thermal management control of a battery energy storage device, the method being applied to the thermal management control system of any one of claims 1-2, the method comprising:
s1, acquiring the cell temperature of each battery module in a battery cluster by BCMU, and determining the highest temperature, the lowest temperature and the maximum temperature difference of each battery module;
s2, the BCMU carries out temperature zone numbering on the battery modules according to the air channels of the battery clusters and the arrangement positions of the battery modules to obtain a plurality of temperature zones;
s3, the BCMU carries out weighted average on the highest temperature in the battery cluster to obtain an adjusting temperature reference value of the fan, wherein the weighted coefficient is determined by a temperature zone where the battery module is located;
s4, the BCMU transmits the temperature regulation reference value to each dynamic temperature zone, so that the BMU compares the highest temperature of each battery module with the temperature regulation reference value, and adjusts the fan wind speed in real time according to a comparison result;
s5, the BMU compares the highest temperature of the battery module with the preset stop temperature of the fan in real time, when the highest temperature is smaller than the preset stop temperature, the fan is controlled to stop, the fan state is monitored, and when the fan state is running, a fault state signal is uploaded to the BAMU through the BCMU, so that the BAMU gives an alarm.
4. The method of thermal management control of a battery energy storage device of claim 3, wherein step S1, further comprises:
acquiring the cell temperature of each battery module through a temperature acquisition unit, and determining the highest temperature;
the BMU compares the highest temperature with a preset starting temperature of the fan, when the highest temperature is higher than the preset starting temperature, the fan is controlled to start, the running state of the fan is monitored, and when the fan state is stopped, a fault state signal is uploaded to the BAMU through the BCMU, so that the BAMU gives an alarm.
5. The method for controlling thermal management of a battery energy storage device according to claim 3, wherein the BMU compares a maximum temperature of each battery module with the temperature adjustment reference value, and adjusts a fan wind speed in real time according to a comparison result, specifically comprising:
the BMU compares the highest temperature of each battery module with the regulating temperature reference value, and if the highest temperature is higher than 1 ℃, the wind speed of the fan is increased by one step, so that the duty ratio of the fan speed regulating PWM wave is increased by 10%; when the wind speed is increased and the temperature of the battery core is reduced, the duty ratio of the PMW is reduced, and balanced consistency control is realized.
6. A thermal management control apparatus for a battery energy storage device, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the thermal management control method of the battery energy storage device of any one of claims 3-5 according to instructions in the program code.
7. A computer-readable storage medium storing a program code for performing the thermal management control method of the battery energy storage device according to any one of claims 3 to 5.
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