CN112838639A - Automobile lithium battery dynamic charging protection system based on knowledge graph and 5G technology - Google Patents

Automobile lithium battery dynamic charging protection system based on knowledge graph and 5G technology Download PDF

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Publication number
CN112838639A
CN112838639A CN202110014865.3A CN202110014865A CN112838639A CN 112838639 A CN112838639 A CN 112838639A CN 202110014865 A CN202110014865 A CN 202110014865A CN 112838639 A CN112838639 A CN 112838639A
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charging
threshold voltage
battery
information
self
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赵泽盟
杨超
李康康
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Jiangsu Jichi Juneng Automobile Technology Co ltd
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Jiangsu Jichi Juneng Automobile Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/30—Information retrieval; Database structures therefor; File system structures therefor of unstructured textual data
    • G06F16/36—Creation of semantic tools, e.g. ontology or thesauri
    • G06F16/367—Ontology
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computational Linguistics (AREA)
  • Data Mining & Analysis (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

According to the automobile lithium battery dynamic charging protection system based on the knowledge graph and the 5G technology, charging information is input into the self-query knowledge graph through the self-query knowledge graph, a first charging threshold voltage can be rapidly queried and obtained, a second charging threshold voltage can be obtained by combining a loss empirical function, the incidence relation of the knowledge graph is more accurate compared with the conventional corresponding relation, the first charging threshold voltage is more accurate, meanwhile, the incidence relation of the knowledge graph comprises the correlation between charging information entities, therefore, due to the change of charging information, the first charging threshold voltage and the second charging threshold voltage can be dynamically changed and adjusted, the accuracy is higher, and the influence of the self loss condition of the battery can be eliminated through the knowledge graph; meanwhile, the knowledge graph is coupled by applying a 5G technology, so that the query efficiency is greatly improved.

Description

Automobile lithium battery dynamic charging protection system based on knowledge graph and 5G technology
Technical Field
The invention relates to the technical field of dynamic protection of battery charging, in particular to a dynamic charging protection system of an automobile lithium battery based on a knowledge graph and a 5G technology.
Background
At present, batteries (such as lithium batteries of mobile phones, lithium batteries of automobiles, lead-acid batteries, and the like) generally have a charging protection function and a quick charging function, but the current charging scheme generally adopts the quick charging function to charge the batteries to about 80%, and then adopts a slow charging mode to perform charging protection, so that the charging protection can be performed on the rechargeable batteries.
But on the one hand, the functions only carry out relatively rigid protection on the rechargeable battery, the loss of the rechargeable battery is not considered, the charging protection error is relatively large, and the battery cannot be effectively charged and protected, on the other hand, for the automobile lithium battery, the charging pile is required to be adopted for charging, the method increases the burden of the charging pile, particularly for the current popular charging pile, the charging pile has the electricity storage function, when the automobile lithium battery is charged, the charging voltage needs to be adjusted at any time, the charging power is adjusted at any time, the charging pile is undoubtedly damaged, the current charging protection is not complete fundamentally, the risk of the charging protection for the automobile lithium battery is only transferred to a charging pile manufacturer from a consumer end, and the problem of the charging protection is not solved.
Disclosure of Invention
To solve the problems in the prior art, an embodiment of a first aspect of the present invention provides a battery charging dynamic protection method, including:
acquiring charging information of a battery, wherein the charging information comprises residual recyclable time data, charging time data and charging duration information each time;
generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge graph, and outputting a first charging threshold voltage by the self-query knowledge graph; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
in the process that the battery is charged by a charging power supply, if the charging voltage of the battery is lower than the second charging threshold voltage, triggering to generate a first pulse current, and if the charging voltage of the battery reaches the first charging threshold voltage, triggering to generate a second pulse current; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the battery, and the second pulse current is used for triggering the energy storage device to be coupled with the charging power supply.
In a preferred embodiment, generating the second charging threshold voltage according to the charging information and the set loss empirical function includes:
based on the ratio of the residual recyclable time data to the set total recyclable time data, setting an overshoot protection threshold, and generating an overshoot protection threshold corresponding to the current residual recyclable time;
generating a threshold error correction value according to the charging time data, the charging time information of each time and a set loss empirical function;
and correcting the overshoot protection threshold value by using the threshold error correction value to obtain the second charging threshold voltage.
In a preferred embodiment, the set loss empirical function is a fitting function between the total charging time, the charging times data and the time length information of each charging and the threshold error correction value.
In a preferred embodiment, further comprising: and establishing the self-query knowledge graph.
In a preferred embodiment, the establishing the self-query knowledge-graph includes:
generating associated data of the first charging threshold voltage and the charging information according to charging information of a plurality of different batteries in the same type and experience values of the corresponding first charging threshold voltage;
establishing the association relation according to the association data, setting the first charging threshold voltage, the remaining recyclable time data, the charging time data and the charging duration information in the charging information as entities, and generating the self-query knowledge graph by combining the association relation and the entities; wherein the content of the first and second substances,
the empirical value is obtained based on the evaluation data of the first expert model.
In a preferred embodiment, further comprising:
acquiring scoring data corresponding to the total charging time from an expert database by combining a second expert model;
determining a corresponding weight factor according to the scoring data in combination with a preset corresponding relation table of the scoring data and the weight factor;
and correcting the output result of the self-query knowledge graph by using the weight factor.
In a preferred embodiment, the set loss empirical function is:
0.78846x total charging duration-0.73775 x number of charges x (median charging duration per charge).
An embodiment of a second aspect of the present invention provides a battery charging dynamic protection apparatus, including:
the charging information acquisition module is used for acquiring charging information of the battery, wherein the charging information comprises residual recyclable time data, charging time data and charging duration information each time;
the threshold voltage generation module is used for generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge map, and outputting a first charging threshold voltage by the self-query knowledge map; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
the charging protection module triggers to generate a first pulse current if the charging voltage of the battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the battery reaches the first charging threshold voltage in the charging process of the battery through a charging power supply; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the battery, and the second pulse current is used for triggering the energy storage device to be coupled with the charging power supply.
In a preferred embodiment, further comprising:
and the knowledge map model generation module is used for establishing the self-query knowledge map.
In a preferred embodiment, further comprising:
the scoring data acquisition module is used for acquiring scoring data corresponding to the total charging time from the expert database by combining with the second expert model;
the weighting factor generation module is used for determining a corresponding weighting factor according to the scoring data in combination with a preset corresponding relation table of the scoring data and the weighting factor;
and the result correction module corrects the output result of the self-query knowledge graph by using the weight factor.
An embodiment of a third aspect of the present invention provides a dynamic charging protection system for an automotive lithium battery, including: battery dynamic protection device and car charging pile, wherein battery charging dynamic protection device includes:
the charging information acquisition module is used for acquiring charging information of the automobile lithium battery from an automobile BMS system, wherein the charging information comprises residual recyclable time data, charging time data and charging time information each time;
the threshold voltage generation module is used for generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge map, and outputting a first charging threshold voltage by the self-query knowledge map; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the first charging threshold voltage in the process that the automobile lithium battery is charged through the automobile charging pile; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the automobile lithium battery, and the second pulse current is used for triggering the energy storage device to be coupled with the automobile charging pile.
The embodiment of the fourth aspect of the invention provides an automobile lithium battery dynamic charging protection system based on a knowledge graph and a 5G technology, which comprises the following steps: battery dynamic protection device and car charging pile, wherein battery charging dynamic protection device includes:
the charging information acquisition module is used for acquiring charging information of the automobile lithium battery from an automobile BMS system through a 5G network, wherein the charging information comprises residual recyclable time data, charging time data and charging time length information each time;
the threshold voltage generation module is used for generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge map, and outputting a first charging threshold voltage by the self-query knowledge map; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the first charging threshold voltage in the process that the automobile lithium battery is charged through the automobile charging pile; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the automobile lithium battery, and the second pulse current is used for triggering the energy storage device to be coupled with the automobile charging pile.
Advantageous effects
According to the technical scheme, the automobile lithium battery dynamic charging protection system based on the knowledge graph and the 5G technology provided by the invention firstly generates a high charging threshold voltage (a first charging threshold voltage) and a low charging threshold voltage (a second charging threshold voltage) through the charging information of the battery, wherein the low charging threshold voltage corresponds to rapid charging, the high charging threshold voltage corresponds to an overshoot interval, further, when the charging voltage of the battery is at a lower level, the charging can be supplemented by discharging through an energy storage device, the charging speed is improved, when the charging voltage of the battery is at a higher level, the charging electric quantity of a charging power supply can be shared by using the energy storage device for charging, further, the loss of the battery due to rapid charging in the final terminal charging link is avoided, the effect of dynamic balance charging is achieved, and meanwhile, the charging threshold voltage of the invention is dynamically generated based on the charging information, the battery wear condition can be adjusted according to the battery wear condition, and the actual condition of each battery can be dynamically attached by combining an empirical wear function, so that the dynamic protection is more accurate and adaptive, and the service life of the battery is greatly prolonged. Meanwhile, charging information is input into the self-query knowledge map through the self-query knowledge map, the first charging threshold voltage can be rapidly queried and obtained, the incidence relation of the knowledge map is more accurate compared with the conventional corresponding relation, the first charging threshold voltage is more accurate, meanwhile, the incidence relation of the knowledge map comprises the correlation between charging information entities, the first charging threshold voltage can be dynamically changed and adjusted along with the change of the charging information, the accuracy is higher, and the influence of the self-loss condition of the battery can be eliminated through the knowledge map.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a dynamic protection method for battery charging according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a dynamic protection apparatus for battery charging according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery charging dynamic protection system according to an embodiment of the present invention;
fig. 4 is a schematic structural example of a topology structure of a bayesian network in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a first embodiment of the present invention provides a battery charging dynamic protection method, including:
s101: acquiring charging information of a battery, wherein the charging information comprises residual recyclable time data, charging time data and charging duration information each time;
s102: generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge graph, and outputting a first charging threshold voltage by the self-query knowledge graph; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
s103: in the process that the battery is charged by a charging power supply, if the charging voltage of the battery is lower than the second charging threshold voltage, triggering to generate a first pulse current, and if the charging voltage of the battery reaches the first charging threshold voltage, triggering to generate a second pulse current; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the battery, and the second pulse current is used for triggering the energy storage device to be coupled with the charging power supply.
According to the technical scheme, the battery charging dynamic protection method provided by the invention comprises the steps of firstly generating a high charging threshold voltage (a first charging threshold voltage) and a low charging threshold voltage (a second charging threshold voltage) through the charging information of the battery, wherein the low charging threshold voltage corresponds to rapid charging, the high charging threshold voltage corresponds to an overshoot interval, further discharging and supplementing charging can be carried out through an energy storage device when the charging voltage of the battery is in a lower level, the charging speed is improved, when the charging voltage of the battery is in a higher level, the charging electric quantity of a charging power supply can be shared by using the energy storage device for charging, further, the loss of the battery due to rapid charging in the last terminal charging link is avoided, the effect of dynamic balance charging is achieved, meanwhile, the charging threshold voltage of the battery is dynamically generated based on the charging information, and can be adjusted according to the self loss condition of the battery, the battery protection device can dynamically fit the actual condition of each battery, so that dynamic protection is more accurate and adaptive, and the service life of the battery is greatly prolonged.
Furthermore, the first charging threshold voltage is obtained based on a self-query knowledge map, the self-query knowledge map can represent the association relation between the remaining recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage, the first charging threshold voltage is searched by inputting the charging information, the speed of obtaining the first charging threshold voltage can be greatly improved, and the charging continuity and the charging real-time performance are guaranteed.
Specifically, in the implementation process of the present invention, when charging is started, the charging power supply charges the battery of the present invention with a constant current, and since in the initial stage of charging, rapid charging can be performed, at this time, since the charging voltage of the battery is lower than a second threshold voltage (for example, for a battery with a rated voltage of 48v, the second threshold voltage is 10v), a first pulse current is triggered, the first pulse current is used for triggering an energy storage device to be coupled to the battery, for example, the first pulse current triggers a switch to be turned off, the switch is coupled between the energy storage device and the battery, and thus the energy storage device and the battery can be disconnected and connected through on and off control of the switch.
When the energy storage device is coupled with the battery, because the energy storage device reaches saturation (namely the energy storage device is gradually in a charged state) under the first charging threshold voltage when the energy storage device is charged at the previous time, after the energy storage device is coupled with the battery, the energy storage device can serve as a supplementary power supply to feed the battery, and the charging speed of the battery is improved.
It can be understood that the present charging voltage of the battery in the present invention is related to the internal electric quantity of the battery and is positively correlated, when the battery is charged, the present charging voltage gradually increases from 0 to the maximum saturation voltage of the battery, and the present charging voltage may have one or more different terms in the industry, but the meanings thereof are consistent and are all parameters that can represent the present electric quantity, which is not described in the present invention.
When the current charging voltage of the battery reaches the first charging threshold voltage, the battery is already in a 'large-capacity' state, the battery can be damaged by quick charging at the moment, the prior art realizes the purpose by setting charging power (reducing the charging power), and then certain burden is caused to the charging source, especially for the automobile charging pile.
When the battery reaches the first charging threshold voltage, the second pulse current can be triggered, the energy storage device can be triggered to be coupled with the charging power supply by the second pulse current, and it can be understood that the voltage of the energy storage device is smaller than the voltage of the charging power supply, so that the energy storage device is in a charged state, the charging power supply charges the energy storage device, on one hand, the energy storage device shares the voltage of the charging power supply, so that the current charging power of the battery is reduced, on the other hand, the charging power supply is not required to perform power switching, so that the charging power supply is protected.
Furthermore, according to the charging information and the set loss empirical function, a second charging threshold voltage is generated, the charging information is input into a preset self-query knowledge map, and the self-query knowledge map outputs the first charging threshold voltage, namely the second charging threshold voltage and the first charging threshold voltage are changed and are not fixed values, so that the loss influence in the use process of the battery is avoided.
Specifically, in a preferred embodiment, generating the second charging threshold voltage according to the charging information in combination with setting a loss empirical parameter includes:
based on the ratio of the residual recyclable time data to the set total recyclable time data, setting an overshoot protection threshold, and generating an overshoot protection threshold corresponding to the current residual recyclable time;
generating a threshold error correction value according to the charging time data, the charging time information of each time and a set loss empirical function;
and correcting the overshoot protection threshold value by using the threshold error correction value to obtain the second charging threshold voltage.
In the embodiment, firstly, historical charging condition data of the battery is utilized, the consumption of the battery is considered, and the initially set overshoot protection threshold is subjected to proportion conversion based on the ratio of the remaining recyclable time data to the total recyclable time data to obtain the overshoot protection threshold corresponding to the current remaining recyclable time; and then combining the charging data with a set loss empirical function, wherein the different capacitance loss speeds can be caused by different charging habits, and further combining the loss empirical function to generate a threshold error correction value, wherein the correction value can correct the obtained process protection threshold, and finally, a second charging threshold voltage which is smaller in error and can be dynamically updated is obtained.
In a preferred embodiment, the set loss empirical function is a fitting function between the total charging time, the charging times data and the time length information of each charging and the threshold error correction value.
Specifically, the set loss empirical function is:
0.78846x total charging duration-0.73775 x number of charges x (median charging duration per charge).
In the embodiment, the correction value obtained by combining the charging time and the fitting of each charging information can be more accurately fitted and predicted to obtain the correction value in the current battery state, and the correction value is changed along with the change of the charging time and is also dynamically changed according to the fitting result.
In a preferred embodiment, further comprising:
acquiring scoring data corresponding to the total charging time from an expert database by combining a third expert model;
determining a corresponding weight factor according to the scoring data in combination with a preset corresponding relation table of the scoring data and the weight factor;
adding the weighting factor to the set loss empirical function to obtain a modified set loss empirical function; wherein the content of the first and second substances,
the modified set loss empirical function is as follows:
f is a weight factor x [0.78846x total charging duration-0.73775 x number of charges x (median charging duration per charge) ].
In the embodiment, the weight factor can avoid the correction value from generating larger deviation, and the addition of the weight factor greatly improves the accuracy of the whole empirical function and has better reference function because the weight factor is obtained by combining an expert model.
In a preferred embodiment, further comprising: and establishing the self-query knowledge graph.
In a preferred embodiment, the establishing the self-query knowledge-graph includes:
generating associated data of the first charging threshold voltage and the charging information according to charging information of a plurality of different batteries in the same type and experience values of the corresponding first charging threshold voltage;
establishing the association relation according to the association data, setting the first charging threshold voltage, the remaining recyclable time data, the charging time data and the charging duration information in the charging information as entities, and generating the self-query knowledge graph by combining the association relation and the entities; wherein the content of the first and second substances,
the empirical value is obtained based on the evaluation data of the first expert model.
The self-query knowledge graph can input charging information, then a retrieval formula is formed by the charging information to perform self-query, first charging threshold voltages are obtained quickly, and each first charging threshold voltage is obtained based on evaluation data of a first expert model, namely calibrated by experts according to experience and the like.
Because the input data is charging information
In a preferred embodiment, further comprising:
acquiring scoring data corresponding to the total charging time from an expert database by combining a second expert model;
determining a corresponding weight factor according to the scoring data in combination with a preset corresponding relation table of the scoring data and the weight factor;
and correcting the output result of the self-query knowledge graph by using the weight factor.
In the embodiment, the weight factor can avoid the correction value from generating larger deviation, and the addition of the weight factor greatly improves the accuracy of the output result of the self-query knowledge graph and has better reference function because the weight factor is obtained by combining an expert model.
Referring to fig. 2, a second embodiment of the present invention provides a battery charging dynamic protection apparatus, including:
the charging information acquisition module is used for acquiring charging information of the battery, wherein the charging information comprises residual recyclable time data, charging time data and charging duration information each time;
the threshold voltage generation module is used for generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge map, and outputting a first charging threshold voltage by the self-query knowledge map; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
the charging protection module triggers to generate a first pulse current if the charging voltage of the battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the battery reaches the first charging threshold voltage in the charging process of the battery through a charging power supply; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the battery, and the second pulse current is used for triggering the energy storage device to be coupled with the charging power supply.
In a preferred embodiment, the second charging threshold voltage generation module includes:
the conversion unit is used for generating an overshoot protection threshold value and a fast-rush interval corresponding to the current residual circulatable times based on the ratio of the residual circulatable times to the set total circulatable times, the set overshoot protection threshold value and the fast-rush acceleration interval;
and the second charging threshold voltage generating unit generates the second charging threshold voltage based on the lowest value of the current overshoot protection interval.
In a preferred embodiment, a knowledge-graph model module is constructed to build the self-query knowledge graph.
In a preferred embodiment, the knowledge graph model is a self-query knowledge graph.
In a preferred embodiment, further comprising:
the scoring data acquisition module is used for acquiring scoring data corresponding to the total charging time from the expert database by combining with the second expert model;
the weighting factor generation module is used for determining a corresponding weighting factor according to the scoring data in combination with a preset corresponding relation table of the scoring data and the weighting factor;
and the result correction module corrects the output result of the self-query knowledge graph by using the weight factor.
The relevant effects of the device of the present invention are the same as the corresponding methods described above, and are not described herein in any greater detail.
Referring to fig. 3, a battery charging dynamic protection system according to a third embodiment of the present invention includes: a dynamic battery charging protection device 301 and an automobile charging post 302,
wherein the battery charging dynamic protection device comprises:
the charging information acquisition module is used for acquiring charging information of the automobile lithium battery from an automobile BMS system, wherein the charging information comprises residual recyclable time data, charging time data and charging time information each time;
the threshold voltage generation module generates a second charging threshold voltage according to the charging information and a set loss empirical function, and generates a first charging threshold voltage according to the charging information and the set loss empirical function;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the first charging threshold voltage in the process that the automobile lithium battery is charged through the automobile charging pile; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the automobile lithium battery, and the second pulse current is used for triggering the energy storage device to be coupled with the automobile charging pile.
The relevant effect of the system in the present invention is the same as the above corresponding method, and will not be described herein.
An embodiment of a fourth aspect of the present invention provides a dynamic protection system for charging a lithium battery of an automobile based on an empirical function and a 5G technology, including: a dynamic protection device for charging a battery and an automobile charging pile,
wherein the battery charging dynamic protection device comprises:
the charging information acquisition module is used for acquiring charging information of the automobile lithium battery from an automobile BMS system through a 5G network, wherein the charging information comprises residual recyclable time data, charging time data and charging time length information each time;
the threshold voltage generation module generates a second charging threshold voltage according to the charging information and a set loss empirical function, and generates a first charging threshold voltage according to the charging information and the set loss empirical function;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the first charging threshold voltage in the process that the automobile lithium battery is charged through the automobile charging pile; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the automobile lithium battery, and the second pulse current is used for triggering the energy storage device to be coupled with the automobile charging pile.
The relevant effect of the system in the present invention is the same as the above corresponding method, and will not be described herein.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A method for dynamic protection of battery charging, comprising:
acquiring charging information of a battery, wherein the charging information comprises residual recyclable time data, charging time data and charging duration information each time;
generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge graph, and outputting a first charging threshold voltage by the self-query knowledge graph; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
in the process that the battery is charged by a charging power supply, if the charging voltage of the battery is lower than the second charging threshold voltage, triggering to generate a first pulse current, and if the charging voltage of the battery reaches the first charging threshold voltage, triggering to generate a second pulse current; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the battery, and the second pulse current is used for triggering the energy storage device to be coupled with the charging power supply.
2. The battery charging dynamic protection method of claim 1, wherein generating a second charging threshold voltage based on the charging information and a set loss empirical function comprises:
based on the ratio of the residual recyclable time data to the set total recyclable time data, setting an overshoot protection threshold, and generating an overshoot protection threshold corresponding to the current residual recyclable time;
generating a threshold error correction value according to the charging time data, the charging time information of each time and a set loss empirical function;
and correcting the overshoot protection threshold value by using the threshold error correction value to obtain the second charging threshold voltage.
3. The battery charging dynamic protection method of claim 2, wherein the set depletion empirical function is a fitting function between the total charging time, the charging times data, and the time length information for each charging and the threshold error correction value.
4. The battery charging dynamic protection method of claim 1, further comprising: and establishing the self-query knowledge graph.
5. The battery charge dynamic protection method of claim 4, wherein the establishing the self-query knowledge-graph comprises:
generating associated data of the first charging threshold voltage and the charging information according to charging information of a plurality of different batteries in the same type and experience values of the corresponding first charging threshold voltage;
establishing the association relation according to the association data, setting the first charging threshold voltage, the remaining recyclable time data, the charging time data and the charging duration information in the charging information as entities, and generating the self-query knowledge graph by combining the association relation and the entities; wherein the content of the first and second substances,
the empirical value is obtained based on the evaluation data of the first expert model.
6. The battery charging dynamic protection method of claim 5, further comprising:
acquiring scoring data corresponding to the total charging time from an expert database by combining a second expert model;
determining a corresponding weight factor according to the scoring data in combination with a preset corresponding relation table of the scoring data and the weight factor;
and correcting the output result of the self-query knowledge graph by using the weight factor.
7. The battery charging dynamic protection method of claim 3, wherein the set loss empirical function is:
0.78846x total charging duration-0.73775 x number of charges x (median charging duration per charge).
8. A battery charging dynamic protection device, comprising:
the charging information acquisition module is used for acquiring charging information of the battery, wherein the charging information comprises residual recyclable time data, charging time data and charging duration information each time;
the threshold voltage generation module is used for generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge map, and outputting a first charging threshold voltage by the self-query knowledge map; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
the charging protection module triggers to generate a first pulse current if the charging voltage of the battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the battery reaches the first charging threshold voltage in the charging process of the battery through a charging power supply; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the battery, and the second pulse current is used for triggering the energy storage device to be coupled with the charging power supply.
9. The utility model provides a car lithium cell dynamic charging protection system which characterized in that includes: battery dynamic protection device and car charging pile, wherein battery charging dynamic protection device includes:
the charging information acquisition module is used for acquiring charging information of the automobile lithium battery from an automobile BMS system, wherein the charging information comprises residual recyclable time data, charging time data and charging time information each time;
the threshold voltage generation module is used for generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge map, and outputting a first charging threshold voltage by the self-query knowledge map; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the first charging threshold voltage in the process that the automobile lithium battery is charged through the automobile charging pile; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the automobile lithium battery, and the second pulse current is used for triggering the energy storage device to be coupled with the automobile charging pile.
10. Automobile lithium battery dynamic charging protection system based on knowledge map and 5G technique, its characterized in that includes: battery dynamic protection device and car charging pile, wherein battery charging dynamic protection device includes:
the charging information acquisition module is used for acquiring charging information of the automobile lithium battery from an automobile BMS system through a 5G network, wherein the charging information comprises residual recyclable time data, charging time data and charging time length information each time;
the threshold voltage generation module is used for generating a second charging threshold voltage according to the charging information and a set loss empirical function, inputting the charging information into a preset self-query knowledge map, and outputting a first charging threshold voltage by the self-query knowledge map; the self-query knowledge graph comprises: the association relation between the residual recyclable time data, the charging time data and the charging time length information and the first charging threshold voltage is obtained;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the second charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the first charging threshold voltage in the process that the automobile lithium battery is charged through the automobile charging pile; wherein the content of the first and second substances,
the first pulse current is used for triggering an energy storage device to be coupled with the automobile lithium battery, and the second pulse current is used for triggering the energy storage device to be coupled with the automobile charging pile.
CN202110014865.3A 2021-01-06 2021-01-06 Automobile lithium battery dynamic charging protection system based on knowledge graph and 5G technology Pending CN112838639A (en)

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