CN112224088A - Charging control method, system and equipment - Google Patents
Charging control method, system and equipment Download PDFInfo
- Publication number
- CN112224088A CN112224088A CN201911399370.6A CN201911399370A CN112224088A CN 112224088 A CN112224088 A CN 112224088A CN 201911399370 A CN201911399370 A CN 201911399370A CN 112224088 A CN112224088 A CN 112224088A
- Authority
- CN
- China
- Prior art keywords
- battery
- charging
- charge
- current
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of batteries, and provides a charging control method in an implementation mode, which comprises the following steps: acquiring the current battery charge state of a battery in a charging process; determining internal resistance corresponding to the battery charge state according to the battery charge state; and determining the current charging current according to the internal resistance. A corresponding charging control system, a charging control device and a storage medium are also provided. The embodiment of the invention is beneficial to reducing the heat productivity of the battery in the charging process and reducing the polarization of the battery, thereby prolonging the cycle life of the battery.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a charging control method, a charging control system, and a charging control device.
Background
The biggest problem of the new energy automobile is that the energy density of the battery is not high enough, the endurance mileage is short, and the battery cannot be charged quickly, so the charging time is long. The two are opposite, and because the quick charging cannot be realized at present, consumers necessarily expect that the more the mileage of the electric power charged once is, the better, and the trouble caused by the long charging time is reduced. If the charging is convenient and the charging is completed in a short time like refueling, the endurance anxiety can be eliminated.
In the rapid charging industry in recent years, research and development are continuously carried out, but no substantial breakthrough exists, mainly due to the fact that the temperature of the battery is too high due to large-current charging, and lithium is easily separated from a negative electrode due to the fact that the voltage of the battery rises too fast in the final charging stage. The current direction of realizing quick charging comprises two parts, namely, reducing the impedance of the battery from the raw material, and reducing the impedance from the charging mechanism or the charging method.
The current industry has some charging methods, one is stepped charging, namely large current is adopted in the early stage of charging, and small electric quantity is adopted in the later stage of charging, the method is simple and rough, the biggest problem is that the current is not formulated by combining the impedance characteristics of the battery, for example, the impedance of the battery in different charge states is different, except that the current is reduced in the impedance peak area in the final stage of charging, the current is not accurately increased in the impedance valley area, and in addition, the current is very large in the internal resistance peak area. Therefore, the battery heating still shows fluctuation, and the quick charge heating is not obviously improved.
Another type of charging method in the industry today is pulsed charging (including the above-mentioned step pulse), which is based on the principle of instantaneous high current charging, followed by a rest of the battery to reduce the internal polarization, so that the charging rests alternate with each other. However, such pulsed charging does not achieve fast charging because of the reduced polarization interval between each pulse.
Soc (state of charge), also known as state of charge or remaining charge of the battery.
Disclosure of Invention
In view of the above, the present invention is directed to a charging control method and system, so as to at least solve the problem of mismatch between the charging current of the battery and the internal resistance of the battery that changes dynamically during the charging process.
In order to achieve the above object, a first aspect of the present invention provides a charge control method, including:
acquiring the current battery charge state of a battery in a charging process;
determining internal resistance corresponding to the battery charge state according to the battery charge state;
and determining the current charging current according to the internal resistance.
Optionally, the determining the internal resistance corresponding to the battery state of charge according to the battery state of charge includes:
and determining the internal resistance corresponding to the battery charge state through a first relation table or a first fitting curve according to the battery charge state, wherein the first relation table or the first fitting curve at least records the internal resistance corresponding to each battery charge state in all the battery charge states from the initial charge state to the cut-off charge state of the battery.
Optionally, the first relation table or the first fitted curve is obtained by:
charging the battery by adopting a first charging current, and acquiring all battery charge states and voltage values corresponding to all battery charge states during the period from the initial charging state to the cut-off charging state of the battery in the charging process;
charging the battery by adopting a second charging current, and acquiring all battery charge states and voltage values corresponding to all battery charge states during the period from the initial charging state to the cut-off charging state of the battery in the charging process;
for any battery state of charge, determining a first voltage value corresponding to the first charging current and a second voltage value corresponding to the second charging current in the battery state of charge, and calculating internal resistance corresponding to the battery state of charge by the following formula:
an internal resistance (second voltage value-first voltage value)/(second charging current-first charging current);
and calculating the internal resistances corresponding to the charge states of all the batteries to obtain the first relation table or the first fitting curve recording the corresponding relation between the charge states and the internal resistances of all the batteries.
Optionally, the second charging current is a preset quick charging current of the battery, and the second charging current is greater than the first charging current.
Optionally, the determining the current charging current according to the internal resistance includes:
the current charging current is determined according to the following equation:
the charging current is a preset value/internal resistance.
Optionally, the preset value is a second charging current internal resistance average value;
the average internal resistance value is an arithmetic average of all internal resistance values in the first relation table or the first fitted curve.
Optionally, the method further includes:
writing the corresponding relation between the internal resistance and the charging current into a second relation table or a second fitting curve;
correlating the second relation table or the second fitting curve with the first relation table or the first fitting curve to obtain a third relation table or a third fitting curve; the third relation table or the third fitting curve comprises a corresponding relation between the battery charge state and the charging current, and the current charging current can be directly determined through the third relation table or the third fitting curve according to the battery charge state.
Optionally, after obtaining the current battery state of charge of the battery during the charging process, the method further includes:
judging whether the difference value between the acquired battery charge state and the battery charge state acquired last time is smaller than a set threshold value or not;
if the threshold value is smaller than the set threshold value, the subsequent steps are not executed; otherwise, the subsequent steps are executed to obtain the current charging current.
In the second aspect of the present invention, there is also provided a charging control system including:
and the control module is used for controlling the charging current to charge the battery by adopting the charging control method according to the acquired current battery charge state of the battery.
In a third aspect of the present invention, there is also provided a charge control device including:
at least one processor;
a memory coupled to the at least one processor;
the memory stores instructions executable by the at least one processor, and the at least one processor implements the charging control method by executing the instructions stored by the memory.
The fourth aspect of the present invention also provides a computer-readable storage medium having stored therein instructions that, when run on a computer, cause the computer to execute the aforementioned charging control method.
Through the technical scheme provided by the invention, the following beneficial effects are achieved:
1) the constant and consistent polarization state of the battery is kept in the whole charging process, so that the heat productivity of the battery is smooth in the quick charging process, the overall temperature is greatly reduced, and the problem of overlarge temperature rise in a quick charging scene is solved;
2) the charging current and the polarization of the battery are reduced in a high-impedance area of the battery, and meanwhile, the degradation of the anode and cathode materials caused by lithium ion de-intercalation stress in the charging process can be relieved, and the cycle life of the battery is prolonged.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic flow chart of a charging control method according to an embodiment of the present invention;
FIG. 2 is a graph of a fitted battery capacity versus internal battery resistance in a charge control method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging control system according to an embodiment of the present invention.
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a schematic flow chart of a charging control method according to an embodiment of the present invention. As shown in fig. 1, the present embodiment provides a charge control method including:
acquiring the current battery charge state of a battery in a charging process; determining internal resistance corresponding to the battery charge state according to the battery charge state; and determining the current charging current according to the internal resistance.
Therefore, the impedance characteristics of the battery under different capacities are obtained, and the corresponding charging current is applied, so that the purposes of peak clipping and valley filling can be achieved, the polarization of the battery is constant, the heating of the quick-charging battery can be reduced, and the cycle life is prolonged. The charging method provided by the embodiment can accurately calculate the current values under different charge states by combining the self impedance characteristics of the battery, the charging current can be reduced in the high impedance area of the battery, the heat productivity of the battery is further reduced, the charging can be increased in the low impedance area, the charging time is reduced, and the charging advantage of large current is fully utilized.
Specifically, the embodiment of the invention realizes dynamic control of the charging current by acquiring the battery charge state in the charging process of the battery, determining the current internal resistance according to the current battery charge state, and determining the current charging current according to the current internal resistance, so as to achieve the purpose of matching the charging current with the battery internal resistance.
In an embodiment provided by the present invention, the determining the internal resistance corresponding to the battery state of charge according to the battery state of charge includes: and determining the internal resistance corresponding to the battery charge state through a first relation table or a first fitting curve according to the battery charge state, wherein the first relation table or the first fitting curve at least records the internal resistance corresponding to each battery charge state in all the battery charge states from the initial charge state to the cut-off charge state of the battery. The method for acquiring the corresponding internal resistance is a table look-up method or a table look-up method, wherein the relation table or the fitting curve can be calibrated and recorded through experimental tests, and the relation table or the fitting curve can be subjected to continuous loop iteration through feedback adjustment of internal resistance errors in the experimental test process, so that the precision of the internal resistance value recorded in the relation table or the fitting curve is improved, and the estimated internal resistance value can completely accord with a specific scene; the fitted curve may also be expressed by taking a piecewise function. Furthermore, because the impedance characteristics of the batteries of the same type (with the same internal design) are the same, the relation table or the fitting curve can be obtained only by limited experiments under one type, and the batteries of the same type can directly adopt or copy the relation table or the fitting curve of the battery charge state-internal resistance relation without repeating experiments and calculation. Fig. 2 is a fitting graph of battery capacity and battery internal resistance in the charging control method according to an embodiment of the present invention, where the corresponding relationship between the battery capacity and the battery state of charge is: battery state of charge-battery capacity/maximum battery capacity.
In one embodiment of the present invention, the first relation table or the first fitting curve is obtained by:
charging the battery by adopting a first charging current, and acquiring all battery charge states and voltage values corresponding to all battery charge states during the period from the initial charging state to the cut-off charging state of the battery in the charging process; charging the battery by adopting a second charging current, and acquiring all battery charge states and voltage values corresponding to all battery charge states during the period from the initial charging state to the cut-off charging state of the battery in the charging process; for any battery state of charge, determining a first voltage value corresponding to the first charging current and a second voltage value corresponding to the second charging current in the battery state of charge, and calculating internal resistance corresponding to the battery state of charge by the following formula: an internal resistance (second voltage value-first voltage value)/(second charging current-first charging current); and calculating the internal resistances corresponding to the charge states of all the batteries to obtain the first relation table or the first fitting curve recording the corresponding relation between the charge states and the internal resistances of all the batteries. The second charging current is a preset quick charging current of the battery, and the specific mode that the second charging current is greater than the first charging current is as follows:
1) charging the battery by using a small current I1 in a constant current mode, wherein the current is preferably 1/2-1/5 of a designed quick charging current value, and collecting the charge state of the battery and the voltage U1 corresponding to the charge state of the battery in the charging process;
2) and discharging the battery to a cut-off condition according to a designed current system. Wherein the discharge regime and the cut-off condition are prescribed target values or design values, the purpose of this step being to restore the same cell in the previous step to the same initial state;
3) charging the battery by adopting a constant current mode and using a designed or specified high-rate current I2 charging condition, wherein the current is a designed or specified quick charging current value, and acquiring a battery charge state and a voltage U2 corresponding to the battery charge state in the charging process;
4) calculating the internal resistance value corresponding to the charge state of a certain battery: r ═ U2-U1)/(I2-I1), where U2 is the voltage value corresponding to the battery state of charge in step 3), and U1 is the voltage value corresponding to the battery state of charge in step 1).
Through the above manner, the relation table or the fitting curve including the corresponding relation between the battery state of charge and the internal resistance can be obtained under the experimental condition, and the relation table or the fitting curve is temporarily called as a first relation table or a first fitting curve for convenience of distinguishing.
In an embodiment of the present invention, the determining the current charging current according to the current internal resistance includes: determining the present charging current according to the following formula: the charging current is a preset value/internal resistance. The charging current is obtained by calculation and is inversely proportional to the internal resistance, so that the low-current charging can be carried out in a high-resistance interval of the battery to reduce the polarization and the heat productivity of the battery, and meanwhile, the high-current charging can be carried out in a low-resistance interval to reduce the charging time. The preset value is an experimental value obtained by laboratory measurement, and engineering personnel select and adjust the preset value according to specific scenes and experience. The charging effect is directly determined by setting the fixed value.
In one embodiment of the present invention, a method for selecting a setting value is provided. The preset value is the average value of the internal resistance of the second charging current; the average internal resistance value is an arithmetic average of all internal resistance values in the first relation table or the first fitted curve. Since the second current is constant, it is constant throughout, and the arithmetic mean of the internal resistance values reflects the overall internal resistance level of the battery. The selection mode provided by the embodiment is more suitable for the current overall state of the battery, and the selection of the charging current is more accurate. The internal resistance value may be a continuous value when a fitting curve is used, so that the internal resistance value may be divided into a plurality of rectangles or trapezoids, and the summation and the average value are performed by using the concept of fixed integration.
In one embodiment provided by the present invention, the method further comprises:
writing the corresponding relation between the internal resistance and the charging current into a second relation table or a second fitting curve;
correlating the second relation table or the second fitting curve with the first relation table or the first fitting curve to obtain a third relation table or a third fitting curve; the third relation table or the third fitting curve comprises a corresponding relation between the battery charge state and the charging current, and the current charging current can be directly determined through the third relation table or the third fitting curve according to the battery charge state. In the above embodiment, the corresponding relationship between the internal resistance and the charging current is provided, and if the corresponding relationship is made to be similar to the aforementioned first relational table or the first fitted curve, a relational table or a fitted curve including the corresponding relationship between the internal resistance and the charging current, which is referred to as a second relational table or a second fitted curve herein for distinction, is obtained. The overall idea of the invention is that the battery state of charge → the internal resistance → the charging current, then the second relation table or the second fitting curve is associated with the first relation table or the first fitting curve, and the corresponding relation of the battery state of charge → the charging current is directly obtained, which is referred to as the third relation table or the third fitting curve for distinguishing, and the charging current can be directly obtained without internal resistance conversion in the actual charging scene through the third relation table or the third fitting curve. And writing the third relation table or the third fitting curve into a charging device or a device, and directly implementing the method provided by the invention by controlling the charging current.
In one embodiment of the present invention, after the obtaining the current battery state of charge of the battery during the charging process, the method further includes:
judging whether the difference value between the obtained current battery charge state and the battery charge state obtained last time is smaller than a set threshold value or not; if the threshold value is smaller than the set threshold value, the subsequent steps are not executed; otherwise, the subsequent steps are executed to obtain the current charging current. During the actual charging process of the battery, the state of charge of the battery continuously rises, and when 5% is selected as a set threshold, if the charging current of the last time is calculated at the position where the state of charge of the battery is 40%, the charging current is not calculated and adjusted when the state of charge of the battery is 41% -44%, and is calculated and adjusted again at the position where the state of charge of the battery is 45%. At this set threshold, the charging current theoretically needs to be calculated and adjusted 20 times in the battery state of charge from 0% to 100%. In actual practice, this 5% set threshold is not a fixed value. The smaller the threshold is set, the more the charging gradient and the smoother the curve of the charging current, and of course the more computing resources are required. Setting of the threshold value here balances the relationship between the matching degree of the charging current curve and the calculation amount.
Fig. 3 is a schematic structural diagram of a charging control system according to an embodiment of the present invention, as shown in fig. 3. In an embodiment provided by the present invention, there is also provided a charging control system including:
and the control module is used for controlling the charging current to charge the battery by adopting the charging control method according to the acquired current battery charge state of the battery.
The control module may also be connected to peripheral modules, such as: the charging system comprises a battery charge state acquisition module used for acquiring the current battery charge state and a charging current module used for applying charging current to the battery according to the control signal of the control module.
In an embodiment provided by the present invention, there is also provided a charge control apparatus including:
at least one processor;
a memory coupled to the at least one processor;
the memory stores instructions executable by the at least one processor, and the at least one processor implements the charging control method by executing the instructions stored by the memory. The control module or control device herein has the functions of numerical calculation and logical operation, and it has at least a central processing unit CPU of data processing capability, a random access memory RAM, a read only memory ROM, various I/O ports and interrupt systems, and the like. Here, the control module or the control device may be, for example, a single chip, a chip, or a processor, which is commonly used hardware, and in a more commonly used case, the control module or the control device is a processor of an intelligent terminal or a PC. Here, the device may be an existing controller in a PMS (battery pack management system) or a BMS (battery management system), which implements a function that is a sub-function of the controller. In the specific form of a piece of software code in a hardware runtime environment that relies on the controller in an existing PMS.
In the embodiments provided by the present invention, a computer-readable storage medium is also provided, which stores instructions that, when executed on a computer, cause the computer to execute the aforementioned charging control method.
The various embodiments of the present invention are applicable to an internal charging mechanism of a charging pile or a charger for charging an electric vehicle, and also applicable to a charging mechanism in a single battery charging device. In addition, all lithium ions have different impedance "peak and valley" batteries during charging, so any lithium ion battery can be effectively charged by adopting the embodiment provided by the invention, the positive electrode material of the lithium battery includes but is not limited to Lithium Cobaltate (LCO), lithium iron phosphate (LFP), ternary (NCM, NCA), Lithium Manganate (LMO) and the like, and the negative electrode thereof includes but is not limited to graphite (C), silicon (Si), tin (Zn), Lithium Titanate (LTO) and the like.
Through the implementation mode, the current values under different charge states can be accurately calculated by combining the self impedance characteristics of the battery, the high impedance area of the battery can reduce the current and reduce the heat productivity in the charging process of the battery, and the low impedance area can be fully utilized to increase the current. Through the control of the charging current, the problem of temperature rise in the charging process is solved, and the degradation of the anode material and the cathode material caused by lithium ion de-intercalation stress in the charging process is relieved, so that the problem of short cycle life of the large battery due to high-current charging temperature rise is further solved.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A charge control method, characterized in that the method comprises:
acquiring the current battery charge state of a battery in a charging process;
determining internal resistance corresponding to the battery charge state according to the battery charge state;
and determining the current charging current according to the internal resistance.
2. The method of claim 1, wherein said determining the internal resistance corresponding to the battery state of charge from the battery state of charge comprises:
and determining the internal resistance corresponding to the battery charge state through a first relation table or a first fitting curve according to the battery charge state, wherein the first relation table or the first fitting curve at least records the internal resistance corresponding to each battery charge state in all the battery charge states from the initial charge state to the cut-off charge state of the battery.
3. The method of claim 2, wherein the first relational table or the first fitted curve is obtained by:
charging the battery by adopting a first charging current, and acquiring all battery charge states and voltage values corresponding to all battery charge states during the period from the initial charging state to the cut-off charging state of the battery in the charging process;
charging the battery by adopting a second charging current, and acquiring all battery charge states and voltage values corresponding to all battery charge states during the period from the initial charging state to the cut-off charging state of the battery in the charging process;
for any battery state of charge, determining a first voltage value corresponding to the first charging current and a second voltage value corresponding to the second charging current in the battery state of charge, and calculating internal resistance corresponding to the battery state of charge by the following formula:
an internal resistance (second voltage value-first voltage value)/(second charging current-first charging current);
and calculating the internal resistances corresponding to the charge states of all the batteries to obtain the first relation table or the first fitting curve recording the corresponding relation between the charge states and the internal resistances of all the batteries.
4. The method of claim 3, wherein the second charging current is a preset fast charging current of the battery, and the second charging current is greater than the first charging current.
5. The method of claim 2, wherein said determining a current charging current based on said internal resistance comprises:
the current charging current is determined according to the following equation:
the charging current is a preset value/internal resistance.
6. The method of claim 5,
the preset value is the average value of the internal resistance of the second charging current;
the average internal resistance value is an arithmetic average of all internal resistance values in the first relation table or the first fitted curve.
7. The method of claim 5, further comprising:
writing the corresponding relation between the internal resistance and the charging current into a second relation table or a second fitting curve;
correlating the second relation table or the second fitting curve with the first relation table or the first fitting curve to obtain a third relation table or a third fitting curve; the third relation table or the third fitting curve comprises a corresponding relation between the battery charge state and the charging current, and the current charging current can be directly determined through the third relation table or the third fitting curve according to the battery charge state.
8. The method of any one of claims 1 to 7, wherein after said obtaining a current battery state of charge of the battery during charging, the method further comprises:
judging whether the difference value between the acquired battery charge state and the battery charge state acquired last time is smaller than a set threshold value or not;
if the threshold value is smaller than the set threshold value, the subsequent steps are not executed; otherwise, the subsequent steps are executed to obtain the current charging current.
9. A charging control system, characterized in that the charging control system comprises:
the control module is configured to control a charging current to charge the battery by using the charging control method according to any one of claims 1 to 8 according to the obtained current battery state of charge of the battery.
10. A charge control device, characterized by comprising:
at least one processor;
a memory coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, the at least one processor implementing the charge control method of any one of claims 1 to 8 by executing the instructions stored by the memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911399370.6A CN112224088A (en) | 2019-12-30 | 2019-12-30 | Charging control method, system and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911399370.6A CN112224088A (en) | 2019-12-30 | 2019-12-30 | Charging control method, system and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112224088A true CN112224088A (en) | 2021-01-15 |
Family
ID=74111261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911399370.6A Pending CN112224088A (en) | 2019-12-30 | 2019-12-30 | Charging control method, system and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112224088A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125980A (en) * | 2021-03-05 | 2021-07-16 | 深圳逸驰云动科技有限公司 | Method and device for detecting direct current internal resistance of battery and terminal equipment |
| CN113135116A (en) * | 2021-04-02 | 2021-07-20 | 北京汽车研究总院有限公司 | Overcharge prevention control method and device for battery system, storage medium and electric vehicle |
| CN118163662A (en) * | 2024-05-14 | 2024-06-11 | 成都佳灵零碳车业科技有限公司 | Super-power intelligent high-speed charging method, system, equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140365065A1 (en) * | 2012-01-30 | 2014-12-11 | HYDRO-QUéBEC | Protected system for controlling power transactions for an electric vehicle |
| CN106451592A (en) * | 2016-07-29 | 2017-02-22 | 北京车和家信息技术有限责任公司 | Battery charging and discharging control method, battery charging and discharging control device and electric car |
| CN107069120A (en) * | 2017-03-22 | 2017-08-18 | 广州小鹏汽车科技有限公司 | A kind of fast charging device and method of electric car automobile lithium ion battery |
| CN109861321A (en) * | 2019-01-17 | 2019-06-07 | 江苏塔菲尔新能源科技股份有限公司 | A kind of charging method and charging system of adjust automatically charging strategy |
| CN110176795A (en) * | 2019-05-30 | 2019-08-27 | Oppo广东移动通信有限公司 | Charging method and device, charging system, electronic equipment, storage medium |
-
2019
- 2019-12-30 CN CN201911399370.6A patent/CN112224088A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140365065A1 (en) * | 2012-01-30 | 2014-12-11 | HYDRO-QUéBEC | Protected system for controlling power transactions for an electric vehicle |
| CN106451592A (en) * | 2016-07-29 | 2017-02-22 | 北京车和家信息技术有限责任公司 | Battery charging and discharging control method, battery charging and discharging control device and electric car |
| CN107069120A (en) * | 2017-03-22 | 2017-08-18 | 广州小鹏汽车科技有限公司 | A kind of fast charging device and method of electric car automobile lithium ion battery |
| CN109861321A (en) * | 2019-01-17 | 2019-06-07 | 江苏塔菲尔新能源科技股份有限公司 | A kind of charging method and charging system of adjust automatically charging strategy |
| CN110176795A (en) * | 2019-05-30 | 2019-08-27 | Oppo广东移动通信有限公司 | Charging method and device, charging system, electronic equipment, storage medium |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125980A (en) * | 2021-03-05 | 2021-07-16 | 深圳逸驰云动科技有限公司 | Method and device for detecting direct current internal resistance of battery and terminal equipment |
| CN113125980B (en) * | 2021-03-05 | 2022-04-08 | 深圳逸驰云动科技有限公司 | Method and device for detecting direct current internal resistance of battery and terminal equipment |
| CN113135116A (en) * | 2021-04-02 | 2021-07-20 | 北京汽车研究总院有限公司 | Overcharge prevention control method and device for battery system, storage medium and electric vehicle |
| CN118163662A (en) * | 2024-05-14 | 2024-06-11 | 成都佳灵零碳车业科技有限公司 | Super-power intelligent high-speed charging method, system, equipment and storage medium |
| CN118163662B (en) * | 2024-05-14 | 2024-07-19 | 成都佳灵零碳车业科技有限公司 | Super-power intelligent high-speed charging method, system, equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108333526B (en) | Battery capacity detection method and device | |
| CN109856559B (en) | Lithium battery cycle life prediction method | |
| JP7194887B2 (en) | BATTERY SOC DETERMINATION METHOD, APPARATUS, MANAGEMENT SYSTEM AND STORAGE MEDIUM | |
| US11368034B2 (en) | Method and apparatus with battery charging | |
| CN112224088A (en) | Charging control method, system and equipment | |
| CN112259813B (en) | Battery charging and discharging power determination method, system and equipment | |
| CN112689934B (en) | Charging method, electronic device, and storage medium | |
| US11552494B2 (en) | Method and apparatus controlling charging of battery based on diffusion characteristics of material included in the battery | |
| US11644509B2 (en) | Battery system, SOC estimation method for battery system, computer apparatus, and medium | |
| CN113011007B (en) | Method and system for rapidly identifying thermal model parameters of lithium ion power battery | |
| CN112234661B (en) | Method for determining optimal charging parameter of battery, charging management method and system | |
| US11942810B2 (en) | Apparatus and method for controlling operation of secondary battery using relative deterioration degree of electrode | |
| CN112108400B (en) | Test method for predicting cycle performance of soft package battery | |
| CN112230152B (en) | Method and system for measuring internal resistance increment of single battery cell | |
| CN117233623A (en) | Battery SOC estimation method and device with end correction | |
| CN115303128A (en) | Method, device, equipment and medium for calculating battery equalization time | |
| CN113484783B (en) | Battery SOH detection method, device, system, medium and program product | |
| CN110190349B (en) | Multi-stage temperature control discharging method, device and system for battery | |
| CN118226262A (en) | Battery state of charge estimation method and device, energy storage power station and storage medium | |
| CN115313557A (en) | Battery charging method, device and system, electronic equipment and storage medium | |
| CN112731187B (en) | Battery capacity correction method and battery management system | |
| CN113900028A (en) | Battery health state estimation method considering charge-discharge path | |
| Qian et al. | Research on consistency of Grouped lithium batteries Based on Capacity Increment Curve | |
| CN114665527A (en) | Battery pack charging control method, electronic device, and storage medium | |
| CN117977752A (en) | Equalization strategy and system based on SOC (state of charge) maximum value |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210115 |
|
| RJ01 | Rejection of invention patent application after publication |