CN112838636A - Automobile lithium battery charging dynamic protection system based on empirical function and 5G technology - Google Patents
Automobile lithium battery charging dynamic protection system based on empirical function and 5G technology Download PDFInfo
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- CN112838636A CN112838636A CN202110013567.2A CN202110013567A CN112838636A CN 112838636 A CN112838636 A CN 112838636A CN 202110013567 A CN202110013567 A CN 202110013567A CN 112838636 A CN112838636 A CN 112838636A
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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
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- 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
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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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
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- H02J7/34—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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Abstract
According to the automobile lithium battery charging dynamic protection system based on the empirical function and the 5G technology, the first charging threshold voltage is dynamically generated through the set loss empirical function, the first charging threshold voltage can be adjusted according to the loss condition of the battery, meanwhile, the output result of the loss empirical function is corrected by introducing the weight factor, the output result can dynamically fit with the actual condition of each battery, dynamic protection is more accurate and adaptive, the service life of the battery is greatly prolonged, in addition, the initial data of the automobile lithium battery is obtained from the automobile BMS system through the 5G technology, the initial data obtains charging information through data analysis, and the convenience and the effectiveness of charging information obtaining are improved.
Description
Technical Field
The invention relates to the technical field of dynamic protection of battery charging, in particular to a dynamic protection system for automobile lithium battery charging based on an empirical function 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 first charging threshold voltage through the charging information and a set loss empirical function, and generating a second charging threshold voltage according to the charging information;
in the process that the battery is charged by a charging power supply, if the charging voltage of the battery is lower than the first charging threshold voltage, triggering to generate a first pulse current, and if the charging voltage of the battery reaches the second 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 a first charging threshold voltage from the charging information and a set loss empirical function, and generating a second charging threshold voltage from the charging information comprises:
based on the ratio of the residual recyclable time data to the set total recyclable time data, an overshoot protection threshold and a fast-rush acceleration interval, generating an overshoot protection threshold and a fast-rush interval 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;
correcting the overshoot protection threshold value by using the threshold error correction value to obtain the first charging threshold voltage;
generating the second charging threshold voltage based on a maximum value of a fast-chargeable interval.
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, the set loss empirical function is:
0.77143x total charging duration-0.74015 x number of charges x (median charging duration per charge).
In a preferred embodiment, further comprising:
acquiring scoring data corresponding to the total charging time from an expert database by combining with an 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 [0.77143x total charging duration-0.74015 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 generates a first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the battery reaches the second 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 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;
the threshold error correction value generating unit generates a threshold error correction value according to the charging frequency data, the charging time length information and a set loss empirical function;
a first charging threshold voltage generation unit, which corrects the overshoot protection threshold value by using the threshold error correction value to obtain the first charging threshold voltage;
and a second charging threshold voltage generation unit that generates the second charging threshold voltage based on a maximum value of a fast-chargeable section.
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 in combination with the 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;
the function correction module is used for adding the weight factor to the set loss empirical function to obtain the corrected 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 [0.77143x total charging duration-0.74015 x number of charges x (median charging duration per charge) ].
A third aspect of the present invention provides a battery charging dynamic protection system, comprising: 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 generates a first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the second 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 invention provides a fourth aspect of an automotive lithium battery charging dynamic protection system based on an empirical function and a 5G technology, comprising: 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 acquires initial data of the automobile lithium battery from an automobile BMS system through a 5G technology, the initial data obtains charging information through data analysis, and 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 first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the second charging threshold voltage in the process that the automobile lithium battery is charged through the automobile charging pile; 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 automobile lithium battery charging dynamic protection system based on the empirical function and the 5G technology, the first charging threshold voltage is generated through the charging information and the set loss empirical function, the second charging threshold voltage is generated according to the charging information, further, when the charging voltage of the battery is in a lower level (lower than the first charging threshold voltage), the charging speed can be improved through discharging and supplementary charging of the energy storage device, when the charging voltage of the battery is in a higher level (higher than the second charging threshold voltage), the charging electric quantity of a charging power supply can be shared by charging of the energy storage device, further, the loss of the battery due to quick charging in the last tail end charging link is avoided, and the effect of dynamic balance charging is achieved; in the technical scheme provided by the invention, the first charging threshold voltage is dynamically generated through the set loss empirical function, the first charging threshold voltage can be adjusted according to the loss condition of the battery, and meanwhile, the output result of the loss empirical function is corrected by introducing the weight factor, so that the output result can be dynamically attached to the actual condition of each battery, the dynamic protection is more accurate and adaptive, the service life of the battery is greatly prolonged, in addition, the initial data of the automobile lithium battery is obtained from the automobile BMS system through the 5G technology, the initial data obtains the charging information through data analysis, and the convenience and the effectiveness of the charging information acquisition are improved.
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.
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.
An embodiment of the first aspect of the present invention provides a battery charging dynamic protection method, as shown in fig. 1, 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 first charging threshold voltage through the charging information and a set loss empirical function, and generating a second charging threshold voltage according to the charging information;
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 first charging threshold voltage, triggering to generate a first pulse current, and if the charging voltage of the battery reaches the second 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 dynamic protection method for battery charging provided by the invention generates the first charging threshold voltage through the charging information and the set loss empirical function, generates the second charging threshold voltage according to the charging information, further can discharge and supplement charging through the energy storage device when the charging voltage of the battery is in a lower level (the first charging threshold voltage), improves the charging speed, can share the charging electric quantity of the charging power supply by using the energy storage device for charging when the charging voltage of the battery is in a higher level (the second charging threshold voltage), further avoids the loss of the battery due to the quick charging of the final end charging link, achieves the effect of dynamic balance charging, and meanwhile, the charging threshold voltage of the invention is dynamically generated based on the charging information and the empirical function, 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.
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 second 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 second 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 second 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, the first charging threshold voltage is generated through the charging information and the set loss empirical function, and the second charging threshold voltage is generated according to the charging information, namely the first charging threshold voltage and the second charging threshold voltage are variable and not fixed values, so that the loss influence of the battery in the using process is avoided.
Specifically, in a preferred embodiment, generating a first charging threshold voltage from the charging information and a set loss empirical function, and generating a second charging threshold voltage from the charging information, includes:
based on the ratio of the residual recyclable time data to the set total recyclable time data, an overshoot protection threshold and a fast-rush acceleration interval, generating an overshoot protection threshold and a fast-rush interval 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;
correcting the overshoot protection threshold value by using the threshold error correction value to obtain the first charging threshold voltage;
generating the second charging threshold voltage based on a maximum value of a fast-chargeable interval.
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 value and the fast charging acceleration interval are subjected to proportion conversion based on the ratio of the residual circulatable time data to the total circulatable time data to obtain the overshoot protection threshold value and the fast charging interval corresponding to the current residual circulatable time; and then combining the charging data with a set loss empirical function, wherein different capacitance loss speeds can be caused due to 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 first charging threshold voltage which is small 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:
0.77143x total charging duration-0.74015 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 with an 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 [0.77143x total charging duration-0.74015 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.
Referring to fig. 2, a second embodiment of the present invention provides a battery charging dynamic protection apparatus, including:
the charging information acquisition module 201 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;
a threshold voltage generation module 202, configured to generate a first charging threshold voltage according to the charging information and a set loss empirical function, and generate a second charging threshold voltage according to the charging information;
the charging protection module 203 triggers generation of a first pulse current if the charging voltage of the battery is lower than the first charging threshold voltage, and triggers generation of a second pulse current if the charging voltage of the battery reaches the second 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 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;
the threshold error correction value generating unit generates a threshold error correction value according to the charging frequency data, the charging time length information and a set loss empirical function;
a first charging threshold voltage generation unit, which corrects the overshoot protection threshold value by using the threshold error correction value to obtain the first charging threshold voltage;
and a second charging threshold voltage generation unit that generates the second charging threshold voltage based on a maximum value of a fast-chargeable section.
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, the set loss empirical function is:
0.77143x total charging duration-0.74015 x number of charges x (median charging duration per charge).
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 in combination with the 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;
the function correction module is used for adding the weight factor to the set loss empirical function to obtain the corrected 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 [0.77143x total charging duration-0.74015 x number of charges x (median charging duration per charge) ].
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 first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the second 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 acquires initial data of the automobile lithium battery from an automobile BMS system through a 5G technology, the initial data obtains charging information through data analysis, and 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 first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the second 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.
According to the automobile lithium battery charging dynamic protection system based on the empirical function and the 5G technology, the first charging threshold voltage is generated through the charging information and the set loss empirical function, the second charging threshold voltage is generated according to the charging information, further, when the charging voltage of the battery is in a lower level (lower than the first charging threshold voltage), the charging speed can be improved through discharging and supplementary charging of the energy storage device, when the charging voltage of the battery is in a higher level (higher than the second charging threshold voltage), the charging electric quantity of a charging power supply can be shared by charging of the energy storage device, further, the loss of the battery due to quick charging in the last tail end charging link is avoided, and the effect of dynamic balance charging is achieved; in the technical scheme provided by the invention, the first charging threshold voltage is dynamically generated through the set loss empirical function, the first charging threshold voltage can be adjusted according to the loss condition of the battery, and meanwhile, the output result of the loss empirical function is corrected by introducing the weight factor, so that the output result can be dynamically attached to the actual condition of each battery, the dynamic protection is more accurate and adaptive, the service life of the battery is greatly prolonged, in addition, the initial data of the automobile lithium battery is obtained from the automobile BMS system through the 5G technology, the initial data obtains the charging information through data analysis, and the convenience and the effectiveness of the charging information acquisition are improved.
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 first charging threshold voltage through the charging information and a set loss empirical function, and generating a second charging threshold voltage according to the charging information;
in the process that the battery is charged by a charging power supply, if the charging voltage of the battery is lower than the first charging threshold voltage, triggering to generate a first pulse current, and if the charging voltage of the battery reaches the second 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 first charging threshold voltage from the charging information and a set loss empirical function, and generating a second charging threshold voltage from the charging information comprises:
based on the ratio of the residual recyclable time data to the set total recyclable time data, an overshoot protection threshold and a fast-rush acceleration interval, generating an overshoot protection threshold and a fast-rush interval 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;
correcting the overshoot protection threshold value by using the threshold error correction value to obtain the first charging threshold voltage;
generating the second charging threshold voltage based on a maximum value of a fast-chargeable interval.
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, wherein the set loss empirical function is:
0.77143x total charging duration-0.74015 x number of charges x (median charging duration per charge).
5. The battery charging dynamic protection method of claim 4, further comprising:
acquiring scoring data corresponding to the total charging time from an expert database by combining with an 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 [0.77143x total charging duration-0.74015 x number of charges x (median charging duration per charge) ].
6. 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 generates a first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the battery reaches the second 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.
7. The battery charging dynamic protection device of claim 6, wherein the threshold voltage generation module comprises:
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;
the threshold error correction value generating unit generates a threshold error correction value according to the charging frequency data, the charging time length information and a set loss empirical function;
a first charging threshold voltage generation unit, which corrects the overshoot protection threshold value by using the threshold error correction value to obtain the first charging threshold voltage;
and a second charging threshold voltage generation unit that generates the second charging threshold voltage based on a maximum value of a fast-chargeable section.
8. The battery charging dynamic protection device of claim 7, further comprising:
the scoring data acquisition module is used for acquiring scoring data corresponding to the total charging time from the expert database in combination with the 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;
the function correction module is used for adding the weight factor to the set loss empirical function to obtain the corrected 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 [0.77143x total charging duration-0.74015 x number of charges x (median charging duration per charge) ].
9. A battery charging dynamic protection system, comprising: 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 generates a first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the second 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. Car lithium battery charging dynamic protection system based on empirical function 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 acquires initial data of the automobile lithium battery from an automobile BMS system through a 5G technology, the initial data obtains charging information through data analysis, and 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 first charging threshold voltage through the charging information and a set loss empirical function, and generates a second charging threshold voltage according to the charging information;
the charging protection module triggers to generate a first pulse current if the charging voltage of the automobile lithium battery is lower than the first charging threshold voltage, and triggers to generate a second pulse current if the charging voltage of the automobile lithium battery reaches the second 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.
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| CN115366710A (en) * | 2022-10-24 | 2022-11-22 | 沈阳宇龙新能源汽车有限公司 | New energy automobile self-adaptation control system that charges based on big data |
| CN115366710B (en) * | 2022-10-24 | 2022-12-27 | 沈阳宇龙新能源汽车有限公司 | New energy automobile self-adaptation control system that charges based on big data |
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