CN115692885A - Battery lithium separation protection method and device, electronic equipment and storage medium - Google Patents
Battery lithium separation protection method and device, electronic equipment and storage medium Download PDFInfo
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 67
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a battery lithium separation protection method, a device, electronic equipment and a storage medium, wherein the method comprises the following steps: the method comprises the steps of obtaining the cycle life and the quick charge time of a battery in a preset quick charge mode; determining the cycle number of charge and discharge in a preset quick charge mode according to the cycle life and the quick charge time; determining the current multiplying power under the trimming mode according to the quick charging time, wherein the current multiplying power under the trimming mode is smaller than the current multiplying power under the preset quick charging mode; and converting the charging mode of the battery from a preset quick charging mode to a trimming mode according to the cycle number. By adding the trimming mode after the multiple quick charging mode, the lithium precipitation of the battery can be prevented or slowed down. And the cycle life represents the quick charge cycle performance of the battery, the quick charge time of the preset quick charge mode represents the severity of lithium precipitation of the battery caused by the preset quick charge mode, and the cycle time of charge and discharge in the preset quick charge mode is determined by combining the cycle life and the quick charge time, so that the cycle time is more reasonable to set, and the influence on the user experience is avoided.
Description
Technical Field
The invention relates to the technical field of battery health management, in particular to a battery lithium-separation protection method and device, electronic equipment and a storage medium.
Background
The lithium ion battery is widely applied to the fields of energy storage systems and electric automobiles due to the advantages of environmental friendliness, small pollution, long cycle life, no memory effect and the like, and the improvement of the quick charging capability becomes a general development target of battery manufacturers and whole automobile factories in view of the problems of mileage anxiety, long charging time and the like existing when a user uses an electric automobile.
Fast charging means that a battery is charged by using a high-rate current, but the high-rate charging easily causes lithium precipitation of the battery cell. Along with the accumulation of lithium precipitation, the capacity retention rate of the battery is directly reduced sharply, even a diaphragm is punctured, the internal short circuit of the battery is caused, and the service life of the battery and the safety performance of the battery are seriously influenced.
Disclosure of Invention
The invention provides a battery lithium separation protection method, which aims to solve the problem that battery lithium separation seriously affects the service life of a battery and the safety performance of the battery.
In a first aspect, the present invention provides a method for protecting a lithium battery, comprising:
acquiring the cycle life and the quick charge time of the battery in a preset quick charge mode;
determining the cycle times of charging and discharging in the preset quick charging mode according to the cycle life and the quick charging time;
determining the current multiplying power under a trimming mode according to the quick charging time, wherein the current multiplying power under the trimming mode is smaller than the current multiplying power under a preset quick charging mode;
and converting the charging mode of the battery from a preset quick charging mode to the trimming mode according to the cycle times.
In a second aspect, the present invention provides a lithium deposition protection device for a battery, comprising:
the data acquisition module is used for acquiring the charge-discharge cycle life and the quick charge time of the battery in a preset quick charge mode;
the cycle number determining module is used for determining the cycle number of charging and discharging in the preset quick charging mode according to the cycle life and the quick charging time;
the current multiplying power determining module is used for determining the current multiplying power under a trimming mode according to the quick charging time, and the current multiplying power under the trimming mode is smaller than the current multiplying power under a preset quick charging mode;
and the charging mode conversion module is used for converting the charging mode of the battery from a preset quick charging mode to the trimming mode according to the cycle number.
In a third aspect, the present invention provides an electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the method of lithium battery protection according to the first aspect of the invention.
In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions for causing a processor to implement the method for protecting lithium desorption from a battery according to the first aspect of the present invention when the computer instructions are executed.
According to the battery lithium separation protection method provided by the embodiment of the invention, the cycle life and the quick charge time of the battery in a preset quick charge mode are obtained; determining the cycle number of charge and discharge in a preset quick charge mode according to the cycle life and the quick charge time; determining the current multiplying power under the trimming mode according to the quick charging time, wherein the current multiplying power under the trimming mode is smaller than the current multiplying power under the preset quick charging mode; and converting the charging mode of the battery from a preset quick charging mode to a trimming mode according to the cycle number. Through increasing the mode of rectifying after the mode of charging soon many times, the current multiplying power reduces, can slow down the lithium of separating that battery internal defect or current density inequality lead to, can also prevent the lithium of separating that battery life later stage leads to because reasons such as interior material ageing, electrolyte consumption, extension battery live time, only improves battery cycle performance through the adjustment of the mode of charging. And the cycle life represents the quick charge cycle performance of the battery, the quick charge time of the preset quick charge mode represents the severity of lithium separation of the battery caused by the preset quick charge mode, and the cycle life and the quick charge time are combined to determine the cycle times of charge and discharge in the preset quick charge mode, so that the cycle times are more reasonable, and the lithium separation of the battery is delayed or prevented while the experience of a user using the quick charge mode is prevented from being influenced.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart of a method for protecting lithium deposition from a battery according to an embodiment of the present invention;
fig. 2 is a flow chart of a lithium deposition protection method for a battery according to a second embodiment of the present invention;
FIG. 3 is a comparative graph of capacity retention rate of a battery provided in example two of the present invention;
fig. 4 is a schematic structural diagram of a lithium deposition protection device for a battery according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example one
Fig. 1 is a flowchart of a battery lithium deposition protection method according to an embodiment of the present invention, where the method is applicable to a battery lithium deposition protection situation, and the method may be executed by a battery lithium deposition protection device, where the battery lithium deposition protection device may be implemented in a form of hardware and/or software, and the battery lithium deposition protection device may be configured in an electronic device.
Fast charging means that a battery is charged by adopting high-rate current, however, the high-rate charging easily causes lithium precipitation of the battery core, and in the continuous circulation process, the lithium precipitation of the battery core is aggravated due to uneven current density inside the battery, consumption of active substances by side reactions, battery aging and the like. With the accumulation of lithium precipitation, the capacity retention rate of the battery is directly and rapidly reduced, even a diaphragm is punctured, the internal short circuit of the battery is caused, and the potential safety hazard is caused. However, lithium precipitation is not initially irreversible, and some slight precipitation, at the beginning of the precipitation, can be reduced or eliminated by some means. Therefore, the lithium separation protection of the battery is used for preventing or slowing down the lithium separation of the metal lithium, and the cycle performance of the battery can be effectively improved.
As shown in fig. 1, the battery lithium deposition protection method includes:
s101, acquiring the cycle life and the quick charge time of the battery in a preset quick charge mode.
The battery in this embodiment is a lithium battery, and generally, when the capacity retention rate of the battery falls to a predetermined percentage, for example, 80%, the end of the battery life is considered, the number of charge and discharge cycles experienced at the end of the battery life is the cycle life, the cycle life can be obtained according to the cycle performance parameters of the battery, the cycle performance is one of the standard parameters of the battery, for example, the cycle performance of the battery is 80% > -soh, 2000 times @25 ℃,1C/1C, which means that the battery is charged at 1C and discharged at 1C under the condition of 25 ℃, and the cycle life can be determined to be 2000 times from the number of cycles, if at least 2000 times can be cycled. The cycle life of different batteries of the same model is relatively fixed, so that the cycle life of the current battery can be referred to that of the same model.
For the preset quick charging mode, the quick charging time is relatively fixed, and when the preset quick charging mode is determined, the quick charging time corresponding to the preset quick charging mode can be determined. Specifically, a quick charge strategy corresponding to a preset quick charge mode can be queried, wherein the quick charge strategy comprises current multiplying power; and determining the quick charging time of the battery in a preset quick charging mode according to the current multiplying power, wherein the quick charging time is 1 hour when the current multiplying power during charging is 1C.
It should be noted that the battery capacity is continuously reduced during the use of the battery. The battery can be arranged in an electric device, such as an electric automobile, and a battery management system is usually arranged in the electric device, so that the charging current can be reduced through the battery management system, the charging current is adapted to the battery capacity, and the quick charging time is kept unchanged. For example, when the battery capacity is 1000mAH, the charging current is 1000mA, the quick charging time is 1 hour, and the current multiplying power during charging is 1C; when the battery capacity is reduced to 900mAH, the charging current is adjusted to 900mA, the quick charging time is 1 hour, and the current multiplying power during charging is still 1C.
Herein, the fast charge time generally refers to a charge time of the battery at 10% SOC-80% SOC.
And S102, determining the cycle number of charging and discharging in a preset quick charging mode according to the cycle life and the quick charging time.
The number of cycles of charge and discharge in the preset rapid charge mode means that charge and discharge in the trimming mode are performed at least once after the battery is charged and discharged in the preset rapid charge mode for the number of cycles, wherein it is understood that one charge and one discharge are one cycle. For a user, generally, the trimming mode is intended to be avoided as much as possible, and when the lithium separation protection is performed on the battery through charging and discharging in the trimming mode, the use and the lithium separation protection of the user can be both taken into consideration, for example, the cycle life of the battery a is 2000 times, the quick charging time in the quick charging mode is preset to be 30 minutes, and the charging in the trimming mode is performed once after every 10 times of quick charging is set, so that although the lithium separation protection effect can be better achieved, the user may be too frequent, which affects the experience of the user in using the quick charging mode, and the longer cycle life of the battery a means that the battery cycle performance is better, and frequent charging and trimming are unnecessary.
The longer the cycle life means that the battery has better cycle performance, and the more the number of cycles of the allowed fast charge mode is, the longer the cycle life is, the more the number of cycles of charge and discharge in the allowed fast charge mode is, and the shorter the cycle life is, and the fewer the number of cycles of charge and discharge in the allowed fast charge mode is.
On the other hand, when the quick charge time is short, it is easy to cause serious lithium deposition in the battery, and it is necessary to reduce the number of cycles of the quick charge mode, and therefore, the quick charge time is inversely related to the number of cycles, that is, the shorter the quick charge time is, the smaller the number of cycles of charge and discharge in the allowable quick charge mode is, and the longer the quick charge time is, the larger the number of cycles of charge and discharge in the allowable quick charge mode is.
The cycle life represents the quick charge cycle performance of the battery, the quick charge time of the preset quick charge mode represents the severity of lithium separation of the battery caused by the preset quick charge mode, and the cycle time of charge and discharge in the preset quick charge mode is determined by combining the cycle life and the quick charge time, so that the cycle time is more reasonable to set, and the lithium separation of the battery is delayed or prevented while the experience of a user using the quick charge mode is prevented from being influenced.
And S103, determining the current multiplying power in the trimming mode according to the quick charging time.
And the current multiplying power in the trimming mode is smaller than that in the preset quick charging mode. Here, the current multiplying factor refers to a current multiplying factor at the time of charging and discharging.
And determining the trimming current multiplying power corresponding to the quick charge time in a preset quick charge time-trimming current multiplying power table as the current multiplying power of the battery in the trimming mode.
It should be noted that the execution order of S102 and S103 may be interchanged, and this embodiment does not limit this.
And S104, converting the charging mode of the battery from a preset quick charging mode to a trimming mode according to the cycle number.
The cycle number is the cycle number in the quick charge mode, and after the battery passes through the charge and discharge cycle of the cycle number in the quick charge mode, the charging mode of the battery can be converted from the preset quick charge mode to the trimming mode.
According to the battery lithium separation protection method provided by the embodiment of the invention, the cycle life and the quick charge time of the battery in a preset quick charge mode are obtained; determining the cycle number of charge and discharge in a preset quick charge mode according to the cycle life and the quick charge time; determining the current multiplying power under the trimming mode according to the quick charging time, wherein the current multiplying power under the trimming mode is smaller than the current multiplying power under the preset quick charging mode; and converting the charging mode of the battery from the preset quick charging mode to the trimming mode according to the cycle number. Through increase the mode of repairment after the mode of charging soon many times, the current magnification reduces, can slow down the lithium of analysing that battery internal defect or current density inequality lead to, can also prevent the battery life later stage because the lithium of analysing that reasons such as interior material is ageing, electrolyte consumption lead to, extension battery live time to need not to unpack the battery, only improve battery cycle performance through the adjustment of the mode of charging. And the cycle life represents the quick charge cycle performance of the battery, the quick charge time of the preset quick charge mode represents the severity of lithium separation of the battery caused by the preset quick charge mode, and the cycle life and the quick charge time are combined to determine the cycle times of charge and discharge in the preset quick charge mode, so that the cycle times are more reasonable, and the lithium separation of the battery is delayed or prevented while the experience of a user using the quick charge mode is prevented from being influenced.
Example two
Fig. 2 is a flowchart of a battery lithium deposition protection method provided in the second embodiment of the present invention, which is optimized based on the first embodiment of the present invention, and as shown in fig. 2, the battery lithium deposition protection method includes:
s201, acquiring the cycle life and the quick charge time of the battery in a preset quick charge mode.
The number of charge and discharge cycles experienced at the end of the life of the battery is the cycle life, and in this embodiment, the cycle life can be obtained by detecting the cycle life of the battery of the same type as the current battery, and the cycle life can be obtained by:
charging the battery in a preset quick charging mode, and discharging the battery; increase cycle life by 1; recording the capacity retention rate of the battery; judging whether the capacity conservation rate is smaller than a preset capacity threshold value or not; if so, taking the current cycle life as the cycle life of the battery in a preset quick charging mode; if not, returning to the step of charging the battery in a preset quick charging mode and discharging the battery.
The preset capacity threshold is generally 80%, and the capacity retention rate = (Cn/C1) × 100, where Cn is the discharge capacity of the battery after the n-th quick charge, and C1 is the discharge capacity of the battery after the 1 st quick charge.
For the preset fast charge mode, the fast charge time is relatively fixed, in this embodiment, the fast charge time of the current battery may be obtained by detecting the fast charge time of the battery of the same batch of the same type of the current battery, and the fast charge time may be obtained by:
when the battery is charged in a preset quick charging mode, recording the time required by each charging; and calculating the average value of the time required by each charging to obtain the quick charging time of the battery in the preset quick charging mode.
The quick charge time of the current battery is obtained by detecting the quick charge time of the batteries of the same type and the same batch of the current battery, so that the difference between the batteries of different batches can be reduced, errors caused by directly using standard parameters are avoided, and the quick charge time is more accurate.
S202, determining a cycle time interval corresponding to the cycle life in a preset cycle life-cycle time interval table, and taking the cycle time interval as a first interval of the cycle times of charge and discharge in a preset quick charge mode.
And S203, determining a cycle number interval corresponding to the quick charging time in a preset quick charging time-cycle number interval table as a second interval of the cycle number.
The preset cycle life-cycle number interval table and the preset fast charge time-cycle number interval table can be obtained according to historical data of the same model, and specifically, the cycle number is in direct proportion to the cycle life and in inverse proportion to the fast charge time.
And S204, taking the intersection of the first interval and the second interval as a target interval of the cycle number.
The method comprises the steps that a first interval is a cycle number interval obtained under the condition that only cycle life is considered, a second interval is a cycle number interval obtained under the condition that only fast charging time is considered, a target interval of the cycle number is obtained through intersection of the first interval and the second interval, the cycle number is set more reasonably under the condition that the cycle life and the express train number are simultaneously limited, the target interval is intersection of the two intervals, the range of the first interval and the range of the second interval are reduced, the target interval of the more accurate cycle number can be obtained, and the target interval has higher reference value compared with the first interval and the second interval. For example, the first interval is [50, 100], the second interval is [30, 80], and the intersection of the two intervals is [30, 50], i.e., the target interval of the cycle number.
And S205, calculating a group median of the target interval to obtain the cycle number.
If the target interval [30, 50] of the cycle count is, the cycle count is 40.
And S206, determining the current multiplying power in the trimming mode according to the quick charging time.
And the current multiplying power in the trimming mode is smaller than that in the preset quick charging mode.
The trimming current multiplying power corresponding to the quick charge time can be determined in a preset quick charge time-trimming current multiplying power table and is used as the current multiplying power of the battery in the trimming mode. The current multiplying power in the trimming mode is inversely proportional to the fast charging time.
The preset quick charging time-trimming current multiplying table can be obtained according to standard parameters of the batteries of the same model or through historical data of the batteries of the same model. For example, trimming may be performed for the same fast-charge time at different trimming rates,
and S207, accumulating the charging and discharging times when the battery is charged and discharged in the quick charging mode.
And S208, when the charging and discharging times reach the cycle times, converting the charging mode of the battery from the preset quick charging mode into a trimming mode, and clearing the charging and discharging times.
The cycle number is the charge and discharge number of the quick charge mode between the quick charge mode and the trimming mode. Therefore, when the charging and discharging times reach the cycle times, the charging mode of the battery is switched from the preset quick charging mode to the trimming mode so as to trim the battery, delay or prevent the lithium precipitation of the battery, and clear the charging and discharging times so as to facilitate the cycle of the next quick charging mode.
And S209, after the battery is charged and discharged for the preset trimming times in the trimming mode, converting the charging mode of the battery from the preset trimming mode to the quick charging mode.
Wherein, the preset trimming times can be an integer of 1-3. After executing S209, the process returns to S207.
According to the battery lithium separation protection method provided by the embodiment of the invention, the intersection of the first interval and the second interval is used as the target interval of the cycle number, the first interval is the interval of the cycle number obtained under the condition of only considering the cycle life, the second interval is the interval of the cycle number obtained under the condition of only considering the fast charge time, and the intersection of the first interval and the second interval is used for obtaining the target interval of the cycle number.
In order to further explain the technical effects of the battery lithium separation method, the battery lithium separation method is verified, and the verification process is as follows:
the preset quick-charging system at 25 ℃ is set as follows: 10-80% of SOC charge time of 35min;
comparative example: the battery is subjected to a rapid charge cycle test at 25 ℃ according to the following system:
1.1, charging according to a 25 ℃ rapid charging system, charging the battery to 100% SOC;
1.2, standing for 30min;
1.3, discharging the battery to 2.5V by using 1C current, wherein the first discharge capacity is C1, and the nth discharge capacity is Cn;
1.4, standing for 30min;
1.5, circulating the steps 1.1-1.4;
1.6, calculated capacity retention = Cn/C1 × 100%, the cycle count-capacity retention curve is plotted as shown in fig. 3.
The embodiment of the invention comprises the following steps: the battery is subjected to a rapid charge cycle test at 25 ℃ according to the following system:
2.1, charging by a rapid charging regime at 25 ℃, charging the battery to 100% SOC;
2.2, standing for 30min;
2.3, discharging the battery to 2.5V by using 1C current, wherein the first discharge capacity is C1, and the nth discharge capacity is Cn;
2.4, standing for 30min;
2.5, circulating the step 2.1-2.4 for 50 times;
2.6, charging the battery to 3.65V at a constant current of 0.33C, and standing for 30min;
2.7, discharging the battery to 2.5V at a constant current of 0.33C, and standing for 30min;
2.8, circulating the step 2.1-2.7; the capacity retention = Cn/C1 x 100% was calculated and a cycle number-capacity retention curve was plotted as shown in fig. 3, in which cycle numbers were not counted in steps 2.6-2.7.
The circulation is carried out for about 500 times, and the comparative example begins to be different from the example; disassembling and analyzing the battery which is circulated to 500 times, wherein the comparative example has the lithium precipitation which is clearly visible by naked eyes; in the examples, no lithium deposition was observed due to the periodic charging. The cycle was continued, comparing the accelerated capacity fade due to lithium evolution, and the final cycle life was 1200 times at EOL (80% capacity retention). Although the capacity attenuation of the embodiment is slightly accelerated in about 1000 weeks, the attenuation trend is smaller than that of the comparative example, the inflection point of the attenuation rate appears more gradually, the final cycle life is 1500 times, and the cycle number is improved by 25%.
By comparing the embodiment of the invention with the comparative example, the lithium separation protection method for the battery is verified to be capable of effectively delaying the lithium separation of the battery and prolonging the service life of the battery.
EXAMPLE III
Fig. 4 is a schematic structural diagram of a lithium deposition protection device for a battery according to a third embodiment of the present invention. As shown in fig. 4, the lithium deposition protection device for a battery includes:
the data acquisition module 401 is used for acquiring the cycle life and the quick charge time of the battery in a preset quick charge mode;
a cycle number determining module 402, configured to determine a cycle number of charging and discharging in the preset fast charging mode according to the cycle life and the fast charging time;
a current multiplying power determining module 403, configured to determine a current multiplying power in a trimming mode according to the fast charging time, where the current multiplying power in the trimming mode is smaller than a current multiplying power in a preset fast charging mode;
a charging mode conversion module 404, configured to convert the charging mode of the battery from a preset fast charging mode to the trimming mode according to the cycle number.
In an alternative embodiment of the invention, the cycle life is obtained by:
charging a battery in a preset quick charging mode, and discharging the battery;
increase cycle life by 1;
recording the capacity retention rate of the battery;
judging whether the capacity conservation rate is smaller than a preset capacity threshold value or not;
if so, taking the current cycle life as the cycle life of the battery in a preset quick charging mode;
and if not, returning to the step of charging the battery in a preset quick charging mode and discharging the battery.
In an optional embodiment of the present invention, the fast charge time is obtained by:
when the battery is charged in a preset quick charging mode, recording the time required by each charging;
and calculating the average value of the time required by each charging to obtain the quick charging time of the battery in a preset quick charging mode.
In an alternative embodiment of the present invention, the loop number determining module 402 comprises:
the first interval determining submodule is used for determining a cycle time interval corresponding to the cycle life in a preset cycle life-cycle time interval table, and the cycle time interval is used as a first interval of the cycle times of charge and discharge in a preset quick charge mode;
the second interval determining submodule is used for determining a cycle time interval corresponding to the quick charging time in a preset quick charging time-cycle time interval table, and the cycle time interval is used as a second interval of the cycle times of charging and discharging in a preset quick charging mode;
a target interval determination submodule for taking an intersection of the first interval and the second interval as a target interval of the cycle number;
and the cycle number determining submodule is used for calculating the group median of the target interval to obtain the cycle number.
In an optional embodiment of the present invention, the current magnification determining module 403 includes:
and the current multiplying power determining submodule is used for determining the trimming current multiplying power corresponding to the quick charge time in a preset quick charge time-trimming current multiplying power table, and the current multiplying power is used as the current multiplying power of the battery in the trimming mode.
In an optional embodiment of the present invention, the charging mode converting module 404 includes:
the charging and discharging times accumulation submodule is used for accumulating the charging and discharging times when the battery is charged and discharged in a quick charging mode;
and the charging mode conversion submodule is used for converting the charging mode of the battery from the preset quick charging mode to the trimming mode and clearing the charging and discharging times when the charging and discharging times reach the cycle times.
In an optional embodiment of the present invention, the lithium deposition protection device for a battery further includes:
and the quick charging conversion module is used for converting the charging mode of the battery from the preset trimming to the quick charging mode after the battery is charged and discharged for the preset trimming times in the trimming mode, and returning to the step of accumulating the charging and discharging times when the battery is charged and discharged in the quick charging mode.
The battery lithium separation protection device provided by the embodiment of the invention can execute the battery lithium separation protection method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
FIG. 5 illustrates a schematic diagram of an electronic device 40 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 5, the electronic device 40 includes at least one processor 41, and a memory communicatively connected to the at least one processor 41, such as a Read Only Memory (ROM) 42, a Random Access Memory (RAM) 43, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 41 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 42 or the computer program loaded from the storage unit 48 into the Random Access Memory (RAM) 43. In the RAM 43, various programs and data necessary for the operation of the electronic apparatus 40 can also be stored. The processor 41, the ROM 42, and the RAM 43 are connected to each other via a bus 44. An input/output (I/O) interface 45 is also connected to bus 44.
A plurality of components in the electronic device 40 are connected to the I/O interface 45, including: an input unit 46 such as a keyboard, a mouse, or the like; an output unit 47 such as various types of displays, speakers, and the like; a storage unit 48 such as a magnetic disk, an optical disk, or the like; and a communication unit 49 such as a network card, modem, wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
In some embodiments, the battery lithium extraction protection method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 48. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 40 via the ROM 42 and/or the communication unit 49. When the computer program is loaded into RAM 43 and executed by processor 41, one or more steps of the battery lithiation protection method described above may be performed. Alternatively, in other embodiments, processor 41 may be configured to perform the battery lithium-extraction protection method in any other suitable manner (e.g., by way of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user may provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the Internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired result of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A battery lithium deposition protection method is characterized by comprising the following steps:
acquiring the cycle life and the quick charge time of the battery in a preset quick charge mode;
determining the cycle times of charging and discharging in the preset quick charging mode according to the cycle life and the quick charging time;
determining the current multiplying power under a trimming mode according to the quick charging time, wherein the current multiplying power under the trimming mode is smaller than the current multiplying power under a preset quick charging mode;
and converting the charging mode of the battery from a preset quick charging mode to the trimming mode according to the cycle number.
2. The method of claim 1, wherein the cycle life is obtained by:
charging a battery in a preset quick charging mode, and discharging the battery;
increase cycle life by 1;
recording the capacity retention rate of the battery;
judging whether the capacity conservation rate is smaller than a preset capacity threshold value or not;
if so, taking the current cycle life as the cycle life of the battery in a preset quick charging mode;
and if not, returning to the step of charging the battery in a preset quick charging mode and discharging the battery.
3. The method of claim 1, wherein the fast charge time is obtained by:
when the battery is charged in a preset quick charging mode, recording the time required by each charging;
and calculating the average value of the time required by each charging to obtain the quick charging time of the battery in a preset quick charging mode.
4. The method of claim 1, wherein determining the number of charge and discharge cycles in a preset fast charge mode based on the cycle life and the fast charge time comprises:
determining a cycle number interval corresponding to the cycle life in a preset cycle life-cycle number interval table, and taking the cycle number interval as a first interval of the cycle number of charge and discharge in a preset quick charge mode;
determining a cycle time interval corresponding to the quick charge time in a preset quick charge time-cycle time interval table, and taking the cycle time interval as a second interval of the cycle times of charge and discharge in a preset quick charge mode;
taking the intersection of the first interval and the second interval as a target interval of the cycle number;
and calculating the group median of the target interval to obtain the cycle number.
5. The method of claim 1, wherein said determining a current draw of said battery in a trim mode based on said fast charge time comprises:
and determining the trimming current multiplying power corresponding to the quick charging time in a preset quick charging time-trimming current multiplying power table as the current multiplying power of the battery in a trimming mode.
6. The method of any one of claims 1 to 5, wherein said switching the charging mode of the battery from a preset boost mode to the trim mode according to the number of cycles comprises:
when the battery is charged and discharged in a quick charging mode, accumulating the charging and discharging times;
and when the charging and discharging times reach the cycle times, converting the charging mode of the battery from the preset quick charging mode to the trimming mode, and clearing the charging and discharging times.
7. The method of claim 6, wherein after converting the charging mode of the battery from a preset fast charge to the trim mode, further comprising:
and after the battery is charged and discharged for preset trimming times in the trimming mode, converting the charging mode of the battery from the preset trimming mode to the quick charging mode, and returning to the step of accumulating the charging and discharging times when the battery is charged and discharged in the quick charging mode.
8. A battery lithium deposition protection device, comprising:
the data acquisition module is used for acquiring the cycle life and the quick charge time of the battery in a preset quick charge mode;
the cycle number determining module is used for determining the cycle number of charging and discharging in the preset quick charging mode according to the cycle life and the quick charging time;
the current multiplying power determining module is used for determining the current multiplying power under a trimming mode according to the quick charging time, and the current multiplying power under the trimming mode is smaller than the current multiplying power under a preset quick charging mode;
and the charging mode conversion module is used for converting the charging mode of the battery from a preset quick charging mode to the trimming mode according to the cycle number.
9. An electronic device, characterized in that the electronic device comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the method of battery lithium protection as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium storing computer instructions for causing a processor to implement the method of any one of claims 1-7 when executed.
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| CN116505624A (en) * | 2023-06-27 | 2023-07-28 | 宁德时代新能源科技股份有限公司 | Battery charging control method, device, control equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116505624A (en) * | 2023-06-27 | 2023-07-28 | 宁德时代新能源科技股份有限公司 | Battery charging control method, device, control equipment and storage medium |
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