CN114301141B - Automatic energy storage device and energy storage method for lithium battery - Google Patents
Automatic energy storage device and energy storage method for lithium battery Download PDFInfo
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 245
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 245
- 238000004146 energy storage Methods 0.000 title claims abstract description 235
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000126 substance Substances 0.000 claims description 20
- 238000004088 simulation Methods 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 7
- 238000005457 optimization Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000013058 risk prediction model Methods 0.000 claims description 3
- 238000012549 training Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005406 washing Methods 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 provides an automatic energy storage device and an energy storage method for a lithium battery, which comprise the following steps: connecting the lithium battery pack with a main control device, and arranging sub-control devices among the lithium batteries arranged at intervals; acquiring the internal state and the external environment of the lithium battery pack according to the master control equipment, setting the energy storage threshold of the lithium battery pack according to the internal state and the external environment, and judging whether energy storage is needed or not; and judging whether the energy storage of each lithium battery in the lithium battery pack is the same or not according to the sub-control equipment, and controlling the energy storage of different lithium batteries to be the same at the same time through the sub-control equipment. The invention has the beneficial effects that: the lithium battery can automatically set the threshold value for automatic charging for different families, different places and different scenes according to the acquired information, so that automatic charging is realized, manual charging is not needed, and manpower and material resources are saved. Further saving resources and prolonging the service life of the lithium battery.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to an automatic energy storage device and an energy storage method for a lithium battery.
Background
Lithium batteries are one of the most important achievements of recent 10 years of high-tech research and represent the most advanced level of development of chemical power sources. The new system has the remarkable advantages of high specific energy, long cycle life, environmental friendliness and the like, is a main matched power supply of various advanced portable electronic products, has absolute advantages in mobile occasions, has the global annual demand of 13 hundred million lithium batteries at present, has the annual sales of $ 270 million, and is undoubtedly one of the leading people in the rechargeable battery market. With research and development of new lithium battery materials, innovation of battery manufacturing technologies and participation of numerous scientific research institutions and enterprises, the performance of the lithium ion battery is gradually improved, the cost of the battery is gradually reduced, the safety performance of the battery is also greatly improved, and the lithium ion battery gradually shows application advantages in the field of electric automobiles.
However, at present, under the action of internal and external factors such as overcharge, overdischarge, overheating and mechanical collision, the lithium battery is easy to cause the collapse of a battery diaphragm and internal short circuit, so that thermal runaway is caused to further cause safety problems, and high attention of people should be paid to the lithium battery.
The lithium cell is in the energy storage, and the factor that the temperature rose lies in different lithium cells, and its inside stored energy is different, leads to at the in-process of energy storage, and the demand of charging of every lithium cell is different, can't realize unified simultaneous charging, and this just leads to the different lithium cells when same power supply, and the demand of charging of unbalance has lead to the too fast rising of temperature. Some batteries may be charged more and some may be charged less. All charging and discharging are unbalanced in charging and discharging of the lithium battery, so that the lithium battery is easy to explode and has a very short service life.
Disclosure of Invention
The invention provides an automatic energy storage device and an energy storage method for lithium batteries, which are used for solving the problem that when the lithium batteries store energy, the temperature rises due to different lithium batteries, the energy storage energy in the lithium batteries is different, so that the charging requirements of the lithium batteries are different in the energy storage process, and the uniform and simultaneous charging cannot be realized, so that the unbalanced charging requirements of the different lithium batteries are met when the same power supply supplies power, and the temperature rises too quickly. Some batteries may also be charged more and some may be charged less. All charging and discharging are unbalanced in charging and discharging of the lithium battery, so that the lithium battery is easy to explode and has a very short service life. The function of (1).
In order to achieve the above object, the present invention provides the following technical solutions, including:
an automatic energy storage method for a lithium battery comprises the following steps:
connecting the lithium battery pack with a main control device, and arranging sub-control devices among the lithium batteries arranged at intervals;
acquiring the internal state and the external environment of the lithium battery pack according to the master control equipment, setting the energy storage threshold of the lithium battery pack according to the internal state and the external environment, and judging whether energy storage is needed or not;
and judging whether the energy storage of each lithium battery in the lithium battery pack is the same or not according to the sub-control equipment, and controlling the energy storage of different lithium batteries to be the same at the same time through the sub-control equipment.
As an embodiment of the invention: the method further comprises the following steps:
establishing an energy storage decision model based on a battery pack according to the master control equipment;
establishing an energy storage management model based on each lithium battery according to the sub-control equipment;
determining energy storage requirements according to the energy storage decision model; wherein, the first and the second end of the pipe are connected with each other,
the energy storage requirements include: the energy storage demand, the energy storage voltage value and the energy storage capacity;
controlling the energy storage management model to perform dynamic energy storage according to the energy storage requirement; wherein the content of the first and second substances,
the dynamic charging is as follows:
establishing a charging curve of each lithium battery according to the sub-control equipment;
and respectively adjusting the real-time charging voltage and the real-time charging current of each lithium battery according to the charging curve, and controlling the internal stored energy of each lithium battery to be the same.
As an embodiment of the present invention: the method further comprises the following steps:
when the lithium battery pack stores energy, setting a random variable of the stored energy; wherein the content of the first and second substances,
the random variables include: current, voltage, temperature;
sampling each lithium battery through the sub-control equipment according to the random variable to determine sampling data;
simulating the energy storage view according to the sampling data, and determining the temperature and power map of the lithium battery;
according to the temperature and power map, establishing a functional relation between the temperature and the power based on a risk prediction method;
and judging whether high-temperature alarm is needed or not when the lithium battery pack stores energy according to the functional relation.
As an embodiment of the present invention: the method further comprises the following steps:
according to the master control equipment, a system model based on automatic energy storage is established, and setting parameters during automatic energy storage are determined according to the specification data of the lithium battery pack;
establishing a nonlinear state estimation model of the lithium battery pack according to the setting parameters;
predicting the energy storage capacity of the lithium battery pack at any moment according to the nonlinear state estimation model; wherein the content of the first and second substances,
the predicting further comprises: acquiring actual parameters during automatic energy storage based on the master control equipment;
substituting the actual parameters into a Kalman model for simulation to obtain a simulation model;
and comparing the data of the simulation model with the data of the nonlinear state estimation model, wherein when the deviation degree of the comparison result is within a preset threshold value, the stored energy at any moment is the average value of the output values of the simulation model and the nonlinear state estimation model.
As an embodiment of the invention: the method further comprises the following steps:
determining the connection relation between different lithium batteries according to the sub-control equipment;
setting an associated trigger signal of each sub-control device according to the connection relation; wherein, the first and the second end of the pipe are connected with each other,
the association trigger signal includes: a fault trigger signal, an energy storage completion trigger signal, an energy storage fluctuation starting signal and an energy storage starting trigger signal;
and acquiring the real-time energy storage state of the lithium battery pack through the main control equipment according to the correlation trigger signal.
As an embodiment of the present invention: the method further comprises the following steps:
presetting execution parameters of the lithium battery;
respectively acquiring real-time data of the lithium battery groups and each lithium battery according to the main control equipment and the sub-control equipment;
setting initialization parameters according to the execution parameters and the real-time data;
setting a corresponding energy storage rule when the lithium battery pack stores energy according to the initialization parameter, judging whether the energy storage rule is triggered or not when the lithium battery stores energy, and acquiring a corresponding trigger behavior when the energy storage is punished;
and carrying out energy storage management and control according to the triggering behavior.
As an embodiment of the present invention: the internal states include: an energy storage state and a temperature state; wherein the content of the first and second substances,
the energy storage state comprises an energy storage state of each lithium battery;
the energy storage state is a voltage state, a current state, a charging and discharging state and an operation state; the external environment includes: an external weather condition, an external temperature condition, and an external moderation condition.
As an embodiment of the present invention: the energy storage that passes through divide accuse equipment control different lithium cells is the same constantly, includes:
acquiring real-time energy storage data of each lithium battery in the lithium battery pack according to the sub-control equipment; wherein the content of the first and second substances,
the real-time energy storage data comprises: energy storage voltage data, energy storage current data and real-time energy storage;
judging whether the real-time energy storage states of the lithium batteries are the same or not according to the real-time energy storage states;
when the real-time energy storage states are different, determining a mean value of the real-time energy storage states;
determining a target lithium battery with an implementation energy storage state closest to the real-time energy storage mean value according to the real-time energy storage mean value;
taking the real-time energy storage state of the target lithium battery as a reference, and adjusting the real-time energy storage state of the lithium batteries except the target lithium battery in the battery pack through sub-control equipment;
and adjusting the real-time energy storage state of each lithium battery in the lithium battery pack to be the same as the energy storage state of the target lithium battery.
As an embodiment of the present invention: the method further comprises the following steps:
introducing a data feedback channel between the main control equipment and the branch control equipment to form a cloud-edge-end closed loop architecture;
the master control equipment and dynamic data related to the energy utilization condition and the energy supply condition of the lithium battery pack acquired by the master control equipment are directly uploaded to the cloud side in real time through a closed-loop feedback channel;
constructing a training prediction model and an optimization model through the cloud side, correcting parameters, and timely issuing the updated model to the main control equipment and the main control equipment;
and predicting and optimizing the lithium battery pack by the master control equipment, the master control equipment and the cloud side through cooperative computing and depending on a model issued by the cloud side so as to improve the accuracy and speed of prediction and optimization.
An automatic energy storage device of a lithium battery, comprising:
the main control equipment: the energy storage device is used for acquiring the internal state and the external environment of the lithium battery pack, setting the energy storage threshold of the lithium battery pack according to the internal state and the external environment, and judging whether energy storage is needed or not;
branch control equipment: and the energy storage control system is used for judging whether the energy storage of each lithium battery in the lithium battery pack is the same or not and controlling the energy storage of different lithium batteries to be the same at the same time through the sub-control equipment.
The invention has the beneficial effects that: the lithium battery can automatically set the threshold value for automatic charging for different families, different places and different scenes according to the acquired information, so that automatic charging is realized, manual charging is not needed, and manpower and material resources are saved. Compared with the real-time monitoring in the prior art, the standard threshold is set for charging, the standard threshold is set to be higher, and if equipment is not used for a long time, the energy storage mode is still automatically carried out, so that the energy loss of the lithium battery is easily caused because the energy of the lithium battery escapes all the time. For the present invention, if a toilet is not used for a long time, it may not be charged. Further saving resources and prolonging the service life of the lithium battery.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of an automatic energy storage method for a lithium battery according to an embodiment of the present invention;
fig. 2 is an energy storage control flow chart of an automatic energy storage method for a lithium battery according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an apparatus of an automatic energy storage device for a lithium battery according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention is mainly applied to the technical field of toilets, and because the toilet seat needs to be heated along with the popularization of smart homes, a heat conduction composite film with high insulation strength is generally used inside the toilet seat. Then, the washing machine also has a flushing function and a drying function. The intelligent toilet requires significant power storage. The energy storage devices are many, but the technical field of lithium batteries is mainly researched by the company. In order to save cost, the traditional lithium battery realizes the modes of charge control, discharge control, drying control, seat ring heating control and the like of a lithium battery pack through a master control device. However, in the actual sales feedback process, the defects of the prior art are obviously found, and the electric quantity of each lithium battery in the lithium battery pack is often not uniform because the lithium battery pack is adopted. And the frequent heating is not uniform, and because of the imbalance, the lithium battery pack is frequently and rapidly heated when charging is carried out, for example: in the prior art, if the total remaining power is thirty percent, according to design requirements, if the power of each battery is the same, the full charge generally takes 20 minutes, and the temperature rises by about 15 ℃. However, in practice, a regular charge of fifteen minutes, even less, will rise by 15 degrees celsius, in some special cases even less than ten minutes of rising temperature will exceed the threshold, and in experiments it has been found that the temperature will rise faster if the charge of the battery is less uniform. Therefore, in order to change the current situation, the technical scheme of the invention is designed, each lithium battery of the lithium battery pack is provided with an independent control part, and the problem of temperature rise is solved in a mode of combining master control and sub control.
As shown in fig. 1, an embodiment of the present invention provides:
an automatic energy storage method for a lithium battery comprises the following steps:
connecting the lithium battery pack with a main control device, and arranging sub-control devices among the lithium batteries arranged at intervals;
in actual implementation, the main control device controls the whole battery pack, is connected with each sub-control device, and manages each lithium battery in a unified manner.
Acquiring the internal state and the external environment of the lithium battery pack according to the master control equipment, setting the energy storage threshold of the lithium battery pack according to the internal state and the external environment, and judging whether energy storage is needed or not; the internal state is the internal electric quantity and temperature including the temperature of each lithium battery, and the external environment is the external temperature, moderate temperature and the like, so that the current energy storage energy is judged, and meanwhile, when the set energy storage threshold value is large, the temperature cannot rise to cause equipment damage or equipment service life reduction; if the lithium battery pack is at an excessive temperature or the power supply state affects the life of the lithium battery.
And judging whether the energy storage of each lithium battery in the lithium battery pack is the same or not according to the sub-control equipment, and controlling the energy storage of different lithium batteries to be the same at the same time through the sub-control equipment.
Judging whether the energy storage capacity of each lithium battery is the same or not, namely judging the energy of each lithium battery, for example: the energy storage energy of each lithium battery is not fifty percent, if not, an average value is found, and then the input current and the voltage of each lithium battery are controlled, so that the charging state of each battery can reach the same charging state as soon as possible, namely the same voltage and current, and the lithium battery pack is charged stably under the condition of the same current and voltage.
The principle of the invention is as follows: the lithium battery pack comprises a lithium battery pack, wherein a plurality of lithium batteries are arranged in the lithium battery pack; the lithium battery pack is connected with a master control device; each lithium battery is connected with a sub-control device. The main control equipment can modify an energy storage threshold value of automatic charging according to the internal state and the external environment of the lithium battery pack, and judges whether the charging is required or not; and the sub-control equipment controls and monitors the energy storage state of each lithium battery, and can adjust the energy storage amount of each lithium battery to be the same when storing energy, thereby realizing efficient synchronous charging.
The invention has the beneficial effects that: the lithium battery can automatically set the threshold value for automatic charging for different families, different places and different scenes according to the acquired information, so that automatic charging is realized, manual charging is not needed, and manpower and material resources are saved. Compared with the real-time monitoring in the prior art, the standard threshold is set for charging, the standard threshold is set to be higher, and if equipment is not used for a long time, the energy storage mode is still automatically carried out, so that the energy loss of the lithium battery is easily caused because the energy of the lithium battery escapes all the time. For the present invention, if a toilet is not used for a long time, it may not be charged. Further saving resources and prolonging the service life of the lithium battery.
As an embodiment of the present invention: the method further comprises the following steps:
establishing an energy storage decision model based on a battery pack according to the master control equipment;
the energy storage decision model is a calculation model for judging the energy value of each lithium battery needing energy storage according to the real-time energy storage of each lithium battery of the lithium battery pack.
Establishing an energy storage management model based on each lithium battery according to the sub-control equipment;
determining energy storage requirements according to the energy storage decision model; wherein the content of the first and second substances,
the energy storage requirements include: the energy storage demand, the energy storage voltage value and the energy storage capacity;
controlling the energy storage management model to perform dynamic energy storage according to the energy storage requirement; wherein, the first and the second end of the pipe are connected with each other,
the dynamic charging is as follows:
establishing a charging curve of each lithium battery according to the sub-control equipment;
this charging profile enables a profile to be implemented that shows how long it takes for each lithium battery to be charged and how the voltage is adjusted.
And respectively adjusting the real-time charging voltage and the real-time charging current of each lithium battery according to the charging curve, and controlling the internal stored energy of each lithium battery to be the same.
The principle of the technical scheme is as follows: the energy storage decision and energy storage management are respectively carried out on the main control equipment and the sub-control equipment, and the main control equipment determines the amount of electricity to be charged, the charging input and the charging capacity. The dynamic charging of the sub-control equipment is that each lithium battery can provide a curve for establishing energy storage at real time, the curve displays real-time charging voltage, current, power, residual energy storage and the like, and then the curve of each lithium battery is adjusted to be in the same state.
The beneficial effects of the above technical scheme are that: the invention mainly aims to reduce the time and speed for raising the stability. Since the more unbalanced the battery, the faster the temperature rise, and the main function of the invention is to regulate it uniformly, in the prior art it is not possible to have a lithium battery exactly the same, so we can only regulate it against the outside.
As an embodiment of the present invention: the method further comprises the following steps:
setting a random variable of energy storage when the lithium battery pack stores energy; wherein the content of the first and second substances,
the random variables include: current, voltage, temperature;
sampling each lithium battery through the sub-control equipment according to the random variable to determine sampling data;
simulating the energy storage view according to the sampling data, and determining the temperature and power map of the lithium battery;
according to the temperature and power map, establishing a functional relation between the temperature and the power based on a risk prediction method; the risk prediction method is to prevent the temperature from exceeding a threshold value which is harmful to safety according to the corresponding relation between the power and the temperature.
And judging whether high-temperature alarm is needed or not when the lithium battery pack stores energy according to the functional relation.
The principle of the technical scheme is as follows: when the energy storage is carried out, the temperature is a very important factor, so that the real-time data sampling can be carried out, a risk prediction model is established through the sampled data, and whether the temperature is not high or not needs to be alarmed is judged through the model.
The beneficial effects of the above technical scheme are that: the invention can realize automatic high-temperature alarm and prevent the fire phenomenon.
In one practical embodiment: the method for predicting according to the temperature and the power map comprises the following steps:
step 1: establishing a thermodynamic matrix based on temperature and power:
wherein R is ij Representing the thermodynamic value when the temperature is i and the power is j; this value of the thermal force is also called the risk value.
And 2, step: calculating the information entropy of the risk value according to the thermodynamic matrix:
wherein ALL represents an arbitrary number; i, j represent the thermodynamic values for any temperature and power.
The information entropy has the effect that the larger the information amount of the index is, namely the larger the factors influencing the power are, the smaller the information entropy value is, so that the information entropy can be used as the weight;
and step 3: according to the information entropy, a risk prediction model is constructed, and the risk grade is determined:
where δ represents a coefficient of risk prediction;
e ij * The main purpose of δ is to calculate the risk state, i.e. the risk is severe or not, at temperature i and power j.
The probability is calculated, namely the probability of the existing information entropy; and F is a risk level value which is smaller than the risk threshold, the weather risk threshold or the risk threshold, then the risk level is limited into three stages during the implementation and the implementation of the invention, no risk occurs, the risk threshold is reached, the final situation that the risk must occur is reached, the specific risk level value is set and limited by the implementation according to the formula, and the decision is made according to the actual implementation scene and toilets with different powers. This formula is understood in general as the severity of the risk + the degree of membership that the risk does not occur; in this way, it is judged whether a risk is likely to occur.
As an embodiment of the present invention: the method further comprises the following steps:
according to the master control equipment, a system model based on automatic energy storage is established, and setting parameters during automatic energy storage are determined according to the specification data of the lithium battery pack;
establishing a nonlinear state estimation model of the lithium battery pack according to the setting parameters;
predicting the energy storage capacity of the lithium battery pack at any moment according to the nonlinear state estimation model; wherein the content of the first and second substances,
the predicting further comprises: acquiring actual parameters during automatic energy storage based on the master control equipment;
substituting the actual parameters into a Kalman model for simulation to obtain a simulation model;
and comparing the data of the simulation model with the data of the nonlinear state estimation model, wherein when the deviation degree of the comparison result is within a preset threshold value, the stored energy at any moment is the average value of the output values of the simulation model and the nonlinear state estimation model.
The principle of the technical scheme is as follows: when the energy of each lithium battery is uniformly adjusted, the nonlinear state estimation model determines the corresponding relation between high temperature and energy storage in a linear model mode, and then monitors the real-time temperature. The simulation model is actual parameter simulation based on a Kalman model, and is simulation based on actual data so as to determine a more real temperature and linear model.
The beneficial effects of the above technical scheme are that: the invention can establish a real-time function based on the temperature and the energy storage state, can realize real-time estimation of the temperature state through the function, and can carry out real-time energy storage state output.
As an embodiment of the invention: the method further comprises the following steps:
determining the connection relation between different lithium batteries according to the sub-control equipment;
setting an associated trigger signal of each sub-control device according to the connection relation; wherein the content of the first and second substances,
the association trigger signal includes: a fault trigger signal, an energy storage completion trigger signal, an energy storage fluctuation starting signal and an energy storage starting trigger signal;
and acquiring the real-time energy storage state of the lithium battery pack through the main control equipment according to the correlation trigger signal.
The principle of the technical scheme is as follows: according to the invention, the associated trigger signals are established on the air following equipment, and the finishing state and the initial state of the energy storage can be judged in real time through the trigger signals.
The beneficial effects of the above technical scheme are that: by the mode, whether the charging is started or not can be judged in real time, the charging is finished in real time, and the charging state is displayed in real time.
As an embodiment of the invention: as shown in fig. 2, the method further comprises:
presetting execution parameters of the lithium battery;
respectively acquiring real-time data of the lithium battery groups and each lithium battery according to the main control equipment and the sub-control equipment;
setting initialization parameters according to the execution parameters and the real-time data;
setting a corresponding energy storage rule when the lithium battery pack stores energy according to the initialization parameter, judging whether the energy storage rule is triggered or not when the lithium battery stores energy, and acquiring a corresponding trigger behavior when the energy storage is punished;
and carrying out energy storage management and control according to the triggering behavior.
The principle of the technical scheme is as follows: the invention can preset the execution parameters of the lithium battery during charging, thereby ensuring that various instructions can be quickly executed during energy storage. The invention can set initialization parameters when storing energy, and the reason for setting the initialization parameters is that the charging threshold value of the invention can be changed according to the change of the environment, so that the initialization can be carried out every time a new threshold value is met, and the energy storage precision can be improved conveniently.
The beneficial effects of the above technical scheme are that: the invention can improve the energy storage precision and can execute the instructions at various energy storage moments in time.
As an embodiment of the present invention: the internal states include: an energy storage state and a temperature state; wherein the content of the first and second substances,
the energy storage state comprises an energy storage state of each lithium battery;
the energy storage state is a voltage state, a current state, a charging and discharging state and an operation state; the external environment includes: an external weather condition, an external temperature condition, and an external moderation condition.
The principle of the technical scheme is as follows: the invention monitors the external environment and the internal state of the stored energy in real time, and the running state is the state of stored energy or not. The states such as the weather temperature and the like also have influence on the charging initialization of the lithium battery.
The beneficial effects of the above technical scheme are that: the invention can adjust the threshold value in real time according to the internal state and the external environment during charging, so the invention can monitor the internal state and the external environment in real time.
As an embodiment of the invention: the energy storage time through the branch accuse equipment control different lithium cells is the same, includes:
acquiring real-time energy storage data of each lithium battery in the lithium battery pack according to the sub-control equipment; wherein the content of the first and second substances,
the real-time energy storage data comprises: energy storage voltage data, energy storage current data and real-time energy storage;
judging whether the real-time energy storage states of the lithium batteries are the same or not according to the real-time energy storage states;
when the real-time energy storage states are different, determining a mean value of the real-time energy storage states;
determining a target lithium battery with an energy storage implementation state closest to the real-time energy storage mean value according to the real-time energy storage mean value;
taking the real-time energy storage state of the target lithium battery as a reference, and adjusting the real-time energy storage state of the lithium batteries except the target lithium battery in the battery pack through sub-control equipment;
and adjusting the real-time energy storage state of each lithium battery in the lithium battery pack to be the same as the energy storage state of the target lithium battery.
The principle of the technical scheme is as follows: when the energy is adjusted, the energy storage of each lithium battery is adjusted to be the same in real time, so that the temperature is not increased rapidly, and the stability of energy storage is ensured.
The beneficial effects of the above technical scheme are that: the invention can ensure that the temperature of the lithium battery is not increased sharply when the lithium battery is charged automatically. And the stability of energy storage is ensured.
As an embodiment of the present invention: the method further comprises the following steps:
introducing a data feedback channel between the main control equipment and the branch control equipment to form a cloud-edge-end closed loop architecture;
the master control equipment and dynamic data related to the energy utilization condition and the energy supply condition of the lithium battery pack acquired by the master control equipment are directly uploaded to the cloud side in real time through a closed-loop feedback channel;
constructing a training prediction model and an optimization model through the cloud side, correcting parameters, and timely issuing the updated model to the main control equipment and the main control equipment;
and the main control equipment, the main control equipment and the cloud side are cooperatively calculated, and the lithium battery pack is predicted and optimized by depending on a model issued by the cloud side, so that the prediction and optimization precision and speed are improved.
The principle of the technical scheme is as follows: in the prior art, only the device and the cloud end are needed to be used, or the client end needs to transmit data, so that remote monitoring and control are realized, and therefore the closed-loop architecture of the main control device and the user (the cloud end) can be established. And then, the optimization of the whole model parameter is realized through the closed-loop framework, and the service life of the lithium battery is prolonged.
The beneficial effects of the above technical scheme are that: according to the invention, the energy storage equipment can be managed and controlled in real time in a cloud management and control mode, so that the service life of the lithium battery pack is prolonged.
As shown in fig. 3, an automatic energy storage device for lithium battery includes:
the main control equipment: the energy storage device is used for acquiring the internal state and the external environment of the lithium battery pack, setting the energy storage threshold of the lithium battery pack according to the internal state and the external environment, and judging whether energy storage is needed or not;
branch accuse equipment: and the energy storage control system is used for judging whether the energy storage of each lithium battery in the lithium battery pack is the same or not and controlling the energy storage of different lithium batteries to be the same at the same time through the sub-control equipment.
The principle of the invention is as follows: the lithium battery pack comprises a lithium battery pack, wherein a plurality of lithium batteries are arranged in the lithium battery pack; the lithium battery pack is connected with a master control device; each lithium battery is connected with a sub-control device. The main control equipment can modify the energy storage threshold value of automatic charging according to the internal state and the external environment of the lithium battery pack and judge whether the charging is needed or not; and the sub-control equipment controls and monitors the energy storage state of each lithium battery, and can adjust the energy storage amount of each lithium battery to be the same when storing energy, thereby realizing efficient synchronous charging.
The invention has the beneficial effects that: the lithium battery can automatically set the threshold value for automatic charging for different families, different places and different scenes according to the acquired information, so that automatic charging is realized, manual charging is not needed, and manpower and material resources are saved. Compared with the real-time monitoring in the prior art, the standard threshold is set for charging, the standard threshold is set to be higher, and if equipment is not used for a long time, the energy storage mode is still automatically carried out, so that the energy loss of the lithium battery is easily caused because the energy of the lithium battery escapes all the time. For the present invention, if a toilet is not used for a long time, it may not be charged. Further saving resources and simultaneously increasing the service life of the lithium battery.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. An automatic energy storage method for a lithium battery is characterized by comprising the following steps:
connecting the lithium battery pack with a main control device, and arranging sub-control devices among the lithium batteries arranged at intervals;
acquiring the internal state and the external environment of the lithium battery pack according to the master control equipment, setting the energy storage threshold of the lithium battery pack according to the internal state and the external environment, and judging whether energy storage is needed or not;
judging whether the energy storage of each lithium battery in the lithium battery pack is the same or not according to the sub-control equipment, and controlling the energy storage time of different lithium batteries to be the same through the sub-control equipment;
further comprising:
when the lithium battery pack stores energy, setting a random variable of the stored energy; wherein the content of the first and second substances,
the random variables include: current, voltage, temperature;
sampling each lithium battery through the sub-control equipment according to the random variable to determine sampling data;
according to the sampling data, simulating an energy storage environment, and determining the temperature and the power map of the lithium battery;
according to the temperature and power map, establishing a functional relation between the temperature and the power based on a risk prediction method;
according to the functional relation, judging whether a high-temperature alarm is needed or not when the lithium battery pack stores energy;
when prediction is carried out according to the temperature and power map, the method comprises the following steps:
step 1: establishing a thermodynamic matrix based on temperature and power:
wherein the content of the first and second substances,
is expressed as a temperature of
With a power of
The thermal value of time; this thermal value is also called the risk value;
and 2, step: calculating the information entropy of the risk value according to the thermodynamic matrix:
wherein the content of the first and second substances,
represents any numerical value;
representing the thermodynamic value corresponding to any temperature and power;
the information entropy has the effect that the larger the information amount of the index is, namely the larger the factors influencing the power are, the smaller the information entropy value is, so that the information entropy can be used as the weight;
and step 3: according to the information entropy, a risk prediction model is constructed, and the risk grade is determined:
wherein the content of the first and second substances,
a coefficient representing a risk prediction;
2. The automatic energy storage method for the lithium battery as claimed in claim 1, wherein the method further comprises:
establishing an energy storage decision model based on a battery pack according to the master control equipment;
establishing an energy storage management model based on each lithium battery according to the sub-control equipment;
determining energy storage requirements according to the energy storage decision model; wherein the content of the first and second substances,
the energy storage requirements include: the energy storage demand, the energy storage voltage value and the energy storage capacity;
controlling the energy storage management model to perform dynamic energy storage according to the energy storage requirement; wherein the content of the first and second substances,
the dynamic charging is as follows:
establishing a charging curve of each lithium battery according to the sub-control equipment;
and respectively adjusting the real-time charging voltage and the real-time charging current of each lithium battery according to the charging curve, and controlling the internal stored energy of each lithium battery to be the same.
3. The automatic energy storage method for the lithium battery as claimed in claim 1, wherein the method further comprises:
according to the master control equipment, a system model based on automatic energy storage is established, and according to the specification data of the lithium battery pack, setting parameters during automatic energy storage are determined;
establishing a nonlinear state estimation model of the lithium battery pack according to the setting parameters;
predicting the energy storage capacity of the lithium battery pack at any moment according to the nonlinear state estimation model; wherein the content of the first and second substances,
the predicting further comprises: acquiring actual parameters during automatic energy storage based on the master control equipment;
substituting the actual parameters into a Kalman model for simulation to obtain a simulation model;
and comparing the data of the simulation model and the nonlinear state estimation model, wherein when the deviation degree of the comparison result is within a preset threshold value, the stored energy at any moment is the average value of the output values of the simulation model and the nonlinear state estimation model.
4. The automatic energy storage method for lithium batteries according to claim 1, characterized in that it further comprises:
determining the connection relation between different lithium batteries according to the sub-control equipment;
setting an associated trigger signal of each sub-control device according to the connection relation; wherein the content of the first and second substances,
the association trigger signal includes: a fault trigger signal, an energy storage completion trigger signal, an energy storage fluctuation starting signal and an energy storage starting trigger signal;
and acquiring the real-time energy storage state of the lithium battery pack through the main control equipment according to the correlation trigger signal.
5. The automatic energy storage method for the lithium battery as claimed in claim 1, wherein the method further comprises:
presetting execution parameters of the lithium battery;
respectively acquiring real-time data of the lithium battery pack and each lithium battery according to the main control equipment and the sub-control equipment;
setting initialization parameters according to the execution parameters and the real-time data;
setting a corresponding energy storage rule when the lithium battery pack stores energy according to the initialization parameter, judging whether the energy storage rule is triggered or not when the lithium battery stores energy, and acquiring a corresponding triggering behavior when the energy storage rule is triggered;
and carrying out energy storage management and control according to the triggering behavior.
6. The automatic energy storage method for the lithium battery as claimed in claim 1, wherein the internal state comprises: an energy storage state and a temperature state; wherein, the first and the second end of the pipe are connected with each other,
the energy storage state comprises an energy storage state of each lithium battery;
the energy storage state is a voltage state, a current state, a charging and discharging state and an operation state; the external environment includes: an external weather condition, an external temperature condition, and an external moderation condition.
7. The automatic energy storage method for the lithium battery as claimed in claim 1, wherein the controlling of the energy storage time of different lithium batteries by the sub-control device is the same, comprising:
acquiring real-time energy storage data of each lithium battery in the lithium battery pack according to the sub-control equipment; wherein, the first and the second end of the pipe are connected with each other,
the real-time energy storage data comprises: energy storage voltage data, energy storage current data and real-time energy storage;
judging whether the real-time energy storage state of each lithium battery is the same or not according to the real-time energy storage data;
when the real-time energy storage states of the lithium batteries are different, determining a mean value of the real-time energy storage states;
determining a target lithium battery with an implementation energy storage state closest to the real-time energy storage mean value according to the real-time energy storage state mean value;
taking the real-time energy storage state of the target lithium battery as a reference, and adjusting the real-time energy storage state of the lithium batteries except the target lithium battery in the battery pack through sub-control equipment;
and adjusting the real-time energy storage state of each lithium battery in the lithium battery pack to be the same as the energy storage state of the target lithium battery.
8. The automatic energy storage method for the lithium battery as claimed in claim 1, wherein the method further comprises:
introducing a data feedback channel between the main control equipment and the branch control equipment to form a cloud-edge-end closed loop architecture;
the master control equipment and dynamic data related to the energy utilization condition and the energy supply condition of the lithium battery pack acquired by the master control equipment are directly uploaded to the cloud side in real time through a closed-loop feedback channel;
constructing a training prediction model and an optimization model through the cloud side, correcting parameters, and timely issuing the updated model to the main control equipment and the main control equipment;
and predicting and optimizing the lithium battery pack by the master control equipment, the master control equipment and the cloud side through cooperative computing and depending on a model issued by the cloud side so as to improve the accuracy and speed of prediction and optimization.
9. An automatic energy storage device of lithium cell which characterized in that includes:
the main control equipment: the energy storage device is used for acquiring the internal state and the external environment of the lithium battery pack, setting the energy storage threshold of the lithium battery pack according to the internal state and the external environment, and judging whether energy storage is needed or not;
branch accuse equipment: and the energy storage control system is used for judging whether the energy storage of each lithium battery in the lithium battery pack is the same or not and controlling the energy storage of different lithium batteries to be the same at the same time through the sub-control equipment.
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