CN110729520A - Quick charging method for battery - Google Patents
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- CN110729520A CN110729520A CN201910834950.7A CN201910834950A CN110729520A CN 110729520 A CN110729520 A CN 110729520A CN 201910834950 A CN201910834950 A CN 201910834950A CN 110729520 A CN110729520 A CN 110729520A
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- 238000007600 charging Methods 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010277 constant-current charging Methods 0.000 claims abstract description 43
- 238000007599 discharging Methods 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000010280 constant potential charging Methods 0.000 claims abstract description 23
- 230000003247 decreasing effect Effects 0.000 claims abstract description 13
- 208000028659 discharge Diseases 0.000 claims 3
- 230000008569 process Effects 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010281 constant-current constant-voltage charging Methods 0.000 abstract description 6
- 238000004904 shortening Methods 0.000 abstract description 5
- 230000010287 polarization Effects 0.000 description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 238000010278 pulse charging Methods 0.000 description 5
- 239000013589 supplement Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 description 2
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 2
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
- 230000004622 sleep time Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
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- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a quick charging method for a battery, which comprises the following steps: step one, constant current charging is performed: for a battery needing to be subjected to a charge-discharge test before leaving a factory, constant-current charging is carried out according to a charging current with a preset magnitude until the charging capacity of the battery is equal to 40-50% of SOC; and step two, executing constant voltage charging and discharging: after the constant current charging is finished, a plurality of pulse currents with decreasing sizes are adopted, constant voltage charging and discharging are continuously carried out on the battery, and the charging time of each pulse current is the same. The quick battery charging method disclosed by the invention can optimize the charging process of the battery in two stages of constant-current charging and constant-voltage charging respectively, so that the effects of effectively shortening the overall charging time of the battery and simultaneously improving the utilization rate of battery charging and discharging equipment are achieved, and the quick battery charging method has great practical significance.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a quick battery charging method.
Background
At present, in the production process of a cylindrical lithium ion battery, the steps of testing, grading and the like are required to be carried out on the battery, then the battery qualified by the test is subsequently packaged, and then the product is delivered.
In the original operation mode, the battery needs to be assembled and tested before being packaged and shipped. The operation flow is as follows:
the battery is transferred → power supplement (i.e. charge and discharge test) → assembly test → packaging → final shipment.
From the above operation procedures, it is clear that, in the operation process, when the ternary material battery (all called as a lithium ion secondary battery using ternary polymers such as lithium nickel cobalt manganese oxide or lithium nickel cobalt aluminate as a positive electrode material) is subjected to assembly test, the battery needs to be recharged to ensure that the battery reaches the battery state of charge (SOC) required by a customer, and the SOC is generally controlled below 50% SOC. Generally, the charging is carried out at a constant current and a constant voltage of 0.5C until the SOC reaches 40% -50%, and the cut-off current of 50-100 mA is taken as the end.
Considering the characteristics of a ternary material system, the voltage corresponding to 40-50% SOC is within the range of a voltage platform, the charging time of the battery is too long in the constant voltage stage, and the utilization rate of the battery charging and discharging equipment is low.
Therefore, at present, there is an urgent need to develop a technology that can optimize the charging process in the constant current and constant voltage stages, so as to effectively shorten the overall charging time of the battery and improve the utilization rate of the battery charging and discharging equipment.
Disclosure of Invention
The invention aims to provide a method for rapidly charging a battery, aiming at the technical defects in the prior art.
Therefore, the invention provides a quick battery charging method, which comprises the following steps:
step one, constant current charging is performed: for a battery needing to be subjected to a charge-discharge test before leaving a factory, constant-current charging is carried out according to a charging current with a preset magnitude until the charging capacity of the battery is equal to 40-50% of SOC;
and step two, executing constant voltage charging and discharging: after the constant current charging is finished, a plurality of pulse currents with decreasing sizes are adopted, constant voltage charging and discharging are continuously carried out on the battery, and the charging time of each pulse current is the same.
Wherein, in the first step, the charging time of the constant current charging phase is equal to t 1;
the constant current charging time t1 is 10-45 min.
In the first step, the charging current with the preset magnitude is 0.5-1C.
In the second step, in the constant voltage charging and discharging stage, 3-5 decreasing pulse currents are adopted in sequence to perform constant voltage charging and discharging on the battery;
the pulse current in the second step is smaller than the charging current with the preset magnitude in the first step.
In the second step, the plurality of pulse currents are 0.4C charging current, 0.4C discharging current, 0.3C charging current, 0.3C discharging current, 0.2C charging current and 0.2C discharging current in sequence;
the time for each pulse of current was 1 minute.
Compared with the prior art, the technical scheme provided by the invention has the advantages that the quick battery charging method can respectively optimize the charging process of the battery in the constant-current charging stage and the constant-voltage charging stage, effectively shortens the overall charging time of the battery, improves the utilization rate of battery charging and discharging equipment, and has great practical significance.
Drawings
FIG. 1 is a flow chart of a method for rapid battery charging according to the present invention;
fig. 2 is a schematic diagram of a voltage curve of a battery according to a time variation when a ternary material battery is charged and discharged according to an embodiment of the present invention;
fig. 3 is a graph illustrating the voltage variation with time of a conventional ternary material battery during charging and discharging before the present invention is applied.
FIG. 4 is a diagram illustrating a corresponding relationship between SOC and battery voltage when the battery is discharged at a low current of 0.05C;
fig. 5 is a diagram illustrating a linear relationship between the voltage of the battery and the time during the constant current phase.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 to 5, the present invention provides a method for rapidly charging a battery, specifically a method for rapidly charging a ternary material battery in a state of below 50% SOC, specifically including the following steps:
step one, constant current charging is performed: for a battery which needs to be subjected to a charge and discharge test (i.e. power supplement) before leaving a factory, constant-current charging is performed according to a charging current with a preset magnitude until the charging capacity of the battery is equal to 40% -50% of the SOC (i.e. equal to the sum of the original 0.5C constant-current constant-voltage charging electric quantity, see the description in the background section);
and step two, executing constant voltage charging and discharging: after the constant current charging is finished, a plurality of pulse currents with decreasing sizes are adopted, constant voltage charging and discharging are continuously carried out on the battery, and the charging time of each pulse current is the same.
In the first step, specifically, the charging time of the constant-current charging phase is equal to t 1;
note that the constant current charging time t1 satisfies the following equation:
f (v) ═ 3562+2.682 × t1, where f (v) is the target voltage for the final charging requirement corresponding to 40-50% SOC.
For the invention, in order to obtain f (V), the specific process is as follows: first, a corresponding curve between the voltage and the SOC of the battery was confirmed, and a curve in which the discharge was performed at a small current of 0.05C was used as a reference, as shown in fig. 4. For example, if the battery needs to be charged to 40% -50% of SOC, the corresponding voltage is 3650-3700 mV according to a curve, considering the polarization effect of the battery during constant current charging, the voltage falls back after the charging is finished, the upper limit of the charging voltage, i.e. the charging target, is moved upwards, the range of the moving upwards is controlled within 5%, i.e. the adjustment range of 100-200 mV (i.e. the adjustment range of 100-200 mV is performed on the basis of 3650-3700 mV), the adjustment ranges of different systems are different, and the adjustment can be performed according to the actual test result, so that the situation that the voltage still exceeds the upper limit of the set charging target value after the voltage falls back after the battery polarization is avoided.
For the specific implementation of the invention, referring to fig. 2, when the initial constant current charging is performed at 0.5C, i.e., the first-stage constant current stage, a linear relationship exists between the voltage and the time in a 10-45 minute period, corresponding voltage and time data are acquired through 3-5 times of test data, as shown in table 1, a linear equation is established according to tools such as minitab software, and a slope Δ V/Δ t, i.e., a parameter value 2.682, can be fitted according to a simulation equation; 3562 is the intercept V0, the intersection of the curve (scatter plot) with the Y axis in FIG. 5.
Table 1:
| OCV mV | current mA | Time min | Capacity mAh | |
| 1 | 3585.5 | 1300 | 10 | 216.6 |
| 2 | 3616.6 | 1300 | 20 | 433.2 |
| 3 | 3638.9 | 1300 | 30 | 649.9 |
| 4 | 3663.5 | 1300 | 40 | 866.4 |
For the present invention, t1 during constant current charging can be derived according to the above formula, and f (v) ═ 3562+2.682 × t1, and t1 obtained at the same time, can also be verified in reverse direction by the following two aspects and satisfy the following two requirements: firstly, the t1 range preferably satisfies 10-45 minutes, and secondly, the capacity corresponding to the time t1 of the 0.5C constant current charging is approximately equal to the capacity of the original charging mode, namely the capacity of the 0.5C constant current and constant voltage charging to 40-50% SOC set target voltage
In the first step, the constant current charging time t1 is preferably 10-45 min (minutes).
In the first step, specifically, the charging current with the preset magnitude may be 0.5C to 1C (C is used to indicate the rate of charge/discharge capacity of the battery, and 1C indicates the current intensity of the battery when the battery is completely discharged in one hour), and is preferably 0.5C.
In the first step, specifically, the voltage in the constant current charging stage is the high voltage f (v). It should be noted that, as mentioned above, the excess voltage is generally 100 to 200mV higher than the set target, specifically: namely, on the basis of 3650-3700 mV, the adjustment range of 100-200 mV is carried out, namely, the range is controlled within the proportion range of 5%, and optimization can be carried out through trial and error experiments and other modes.
In the second step, in the specific implementation, in the constant-voltage charging and discharging stage, preferably 3-5 decreasing pulse currents are adopted in sequence to perform constant-voltage charging and discharging on the battery;
the pulse current in the second step is smaller than the charging current with the preset magnitude in the first step. For example, the pulse current may be 0.4C charging current, 0.4C discharging current, 0.3C charging current, 0.3C discharging current, 0.2C charging current, 0.2C discharging current in this order;
in a specific implementation, the time of each pulse current may be 1 minute.
In the second step, specifically in implementation, in the constant voltage charge-discharge phase, the sum of the charge and discharge time of the plurality of pulse currents is equal to t 2.
It should be noted that, for the invention, it is considered that the constant current stage adopts 0.5C charging, and the constant voltage stage adopts a pulse decreasing mode to eliminate polarization, that is, the current less than 0.5C is used to perform step decreasing, 0.4C charging is performed for 1-2 minutes, then 0.4C discharging is performed for 1 minute, and dormancy is performed for 1 minute; then a new round of pulsing was performed using 0.3C; finally, pulse charging and discharging are carried out by using 0.2C. In the above flow, the overall time t2 can be obviously calculated.
As mentioned above, the time t2 is equal to the sum of the charge and discharge times of the above 3 pulses plus the intermediate sleep time, and in order to achieve better effect, the 3 inverted step pulses can be changed into n times to improve the consistency between the batteries.
In the present invention, the battery to be used is a ternary material battery, that is, a lithium ion secondary battery in which a ternary polymer such as lithium nickel cobalt manganese oxide or lithium nickel cobalt aluminate is used as a positive electrode material.
It should be noted that, for the invention, the defects of the battery production field are mainly overcome, the charging and discharging test flow of the battery is redesigned, the collection and analysis of the key step data are added, and the main constant current stage charging time t1 and the constant voltage stage charging and discharging time t2 in the power supply process are determined by combining a data fitting equation. Among them, considering that the battery generally completes the charging formation with a small current of 0.2C in the initial stage after assembly and forms a relatively dense and stable solid electrolyte interface film (SEI film) on the surface of the electrode material in the process, a large current of 0.5C to 1C can be used for the process optimization test in the subsequent power supplement process. The charging process optimization is respectively carried out on the two stages of constant current charging and constant voltage charging, wherein in the constant current charging stage, high voltage charging is carried out by using the battery polarization principle, the corresponding constant current charging time t1 is confirmed according to a data fitting equation fv (t), and meanwhile, the charging capacity of the corresponding constant current stage is approximately equal to the sum of the original 0.5C constant current and constant voltage charging capacities; and in the constant voltage stage, n degressive pulse current modes are adopted for carrying out charge and discharge tests to eliminate battery polarization, the most principle of time efficiency is considered, n is 3-5, the test requirement can be met, and t2 is the sum of n degressive pulse charging times, so that the effects of effectively shortening the whole charging time and improving the utilization rate of equipment are finally achieved.
It should be further noted that, for the charge and discharge test flow of the battery, the current and voltage can be adjusted according to batteries of different systems, so as to optimize the specific time for deriving parameters such as t1 and t2 by using a simulation equation, and establish the final test flow.
After the invention is applied, the test flow of the battery is as follows, and the time of the electricity supplementing flow is effectively shortened without change before improvement:
battery transfer → power supplement → assembly test → package → final shipment.
Based on the technical scheme, the invention focuses on the quick charging mode within the range of a battery system platform with the SOC below 50%, decomposes and optimizes constant-current charging and constant-voltage charging, and finally realizes quick charging by using a battery polarization simulation derivation equation, an inverted step pulse polarization elimination mode and the like.
It should be noted that, for the invention, on the basis of the original charging mode, according to the actual production needs, the charging flow and the screening mode are redesigned. Under the original operation mode, the battery charging adopts a direct constant-current constant-voltage charging mode, and the equipment utilization rate is low due to the overlong charging time of the ternary system characteristic in the constant-voltage stage.
The invention redesigns the battery charge-discharge test flow, optimizes the charging process for the constant current charging stage and the constant voltage charging stage respectively, carries out high voltage charging by using the battery polarization principle in the constant current charging stage, and carries out charge-discharge test by adopting a decreasing pulse current mode in the constant voltage stage so as to eliminate the battery polarization, thereby finally achieving the effects of effectively shortening the whole charging time and simultaneously improving the utilization rate of equipment.
In order to more clearly understand the technical solution of the present invention, the following detailed description, test procedures and explanations provided by the present invention are as follows with reference to fig. 2 and 3:
firstly, it should be noted that, for a battery, in a constant current phase, the charging capacity decreases with the increase of current, because the larger the charging current is, the larger the battery polarization is, which results in the decrease of charging efficiency and the decrease of charging capacity; the charging capacity increases with increasing current during the constant voltage phase, because on the one hand the average current during the constant voltage charging phase increases and on the other hand the charging time also increases. In terms of average charging rate, the average charging rate in the constant voltage stage is smaller than the total average charging rate, so that the constant voltage charging stage is an important link influencing the charging speed of the battery, the charging efficiency in the constant current stage is improved, the charging time in the constant voltage stage is shortened, and the key point for improving the charging speed of the battery is achieved.
Considering that the battery generally completes the charging formation of small current 0.2C in the early stage after assembly and forms a relatively dense and stable solid electrolyte interface film (SEI film) on the surface of an electrode material in the process, a flow optimization test can be carried out by using larger current of 0.5C-1C in the subsequent power supply process. The discharge capacity of the battery is improved along with the increase of the charge cut-off voltage, which is mainly because the charge and discharge process of the lithium ion battery is the de-intercalation process of lithium ions, the polarization overpotential is increased along with the increase of the charge cut-off voltage, more lithium ions are de-intercalated, and reversible lithium ions are increased, so that the battery has better charge and discharge performance.
According to the technical scheme, the charging process is optimized in the constant-current charging stage and the constant-voltage charging stage respectively, the battery can reach a set cut-off voltage earlier and enter the constant-voltage charging stage if the charging current is larger in the constant-current charging stage, but the battery polarization is serious due to the overlarge current, the charging time of the corresponding constant-voltage stage is increased, and particularly the constant-voltage charging time of the battery system with the SOC of 40-50% corresponding to the voltage platform range is obviously increased. Therefore, 0.5C constant current charging is preferentially selected at the stage, high voltage charging is carried out by utilizing a battery polarization principle, namely, the voltage of the constant current charging is charged to exceed 40-50% of SOC, the constant current charging is cut off by time, the corresponding constant current charging time t1 is confirmed according to a data fitting equation fv (t), f (V) is 3562+2.682 t1, wherein f (V) is used as the final target voltage needing charging corresponding to 40-50% of SOC, the first order equation is a linear equation when the final t1 value is within the range of 10-45 min by default, and meanwhile, the charging capacity corresponding to the constant current stage is approximately equal to the sum of the original 0.5C constant current and constant voltage charging capacities (namely equal to 40-50% of SOC); and in the constant voltage stage, n decreasing pulse current modes are adopted to carry out charge and discharge tests so as to eliminate battery polarization. If the pulse charging and discharging are carried out by using the constant current value of 0.5C, the temperature rise of the battery is obvious, and is more violent along with the increase of the pulse amplitude, the aging of the battery is accelerated, so that the constant voltage charging stage adopts the decreasing type inverted step pulse charging. Considering the time efficiency optimization principle, n takes a value of 3-5 to meet the test requirement, and t2 is the sum of n pulse charging times with decreasing sizes, so that the effect of effectively shortening the whole charging time and improving the equipment utilization rate is finally achieved. See fig. 2 and 3.
For example, in a specific implementation, for a battery, a specific test flow can be briefly described as follows:
1. first, the battery was dormant for 1 minute;
2. then, 0.5C constant current charging is performed for t1 minutes;
3. then, the battery was dormant for 1 minute;
4. charging for 1 minute at constant current of 0.4 ℃;
5. discharging for 1 minute at constant current of 0.4 ℃;
6. charging for 1 minute at constant current of 0.3 ℃;
7. discharging for 1 minute at constant current of 0.3 ℃;
8. charging for 1 minute at constant current of 0.2C;
9. performing constant current discharge for 1 minute at 0.2 ℃;
10. and (4) continuing to sleep for 1 minute to finish the charging and discharging (namely, power supplementing) process of the battery.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, through redesigning the battery charging and discharging test flow, on the basis of ensuring the consistency of the battery assembly voltage after power supply, the charging and discharging time is effectively shortened, and the utilization rate of equipment is further improved. Meanwhile, the beats of the front-sequence operation and the rear-sequence operation are balanced, the efficiency is maximized, the large-scale production is facilitated, and the application range is wide.
In summary, compared with the prior art, the method for rapidly charging the battery provided by the invention can optimize the charging process of the battery in two stages of constant-current charging and constant-voltage charging respectively, so that the effects of effectively shortening the overall charging time of the battery and simultaneously improving the utilization rate of battery charging and discharging equipment are achieved, and the method has great practical significance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A method for rapidly charging a battery, comprising the steps of:
step one, constant current charging is performed: for a battery needing to be subjected to a charge-discharge test before leaving a factory, constant-current charging is carried out according to a charging current with a preset magnitude until the charging capacity of the battery is equal to 40-50% of SOC;
and step two, executing constant voltage charging and discharging: after the constant current charging is finished, a plurality of pulse currents with decreasing sizes are adopted, constant voltage charging and discharging are continuously carried out on the battery, and the charging time of each pulse current is the same.
2. The battery rapid charging method according to claim 1, wherein in the first step, the charging time of the constant current charging phase is equal to t 1;
the constant current charging time t1 is 10-45 min.
3. The method for rapidly charging a battery according to claim 1, wherein the predetermined amount of charging current is 0.5C to 1C in the first step.
4. The method for rapidly charging a battery according to claim 1, wherein in the second step, in the constant voltage charge and discharge stage, 3 to 5 pulse currents with decreasing magnitude are sequentially applied to charge and discharge the battery at a constant voltage;
the pulse current in the second step is smaller than the charging current with the preset magnitude in the first step.
5. The method for rapidly charging a battery according to claim 4, wherein in the second step, the plurality of pulse currents are a 0.4C charging current, a 0.4C discharging current, a 0.3C charging current, a 0.3C discharging current, a 0.2C charging current, a 0.2C discharging current, in this order;
the time for each pulse of current was 1 minute.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934037A (en) * | 2020-07-14 | 2020-11-13 | 浙江零跑科技有限公司 | Battery charging method and computer readable storage medium |
| CN113611931A (en) * | 2021-08-05 | 2021-11-05 | 森克创能(天津)新能源科技有限公司 | Step charging method of zinc-nickel battery |
| CN113972411A (en) * | 2021-09-28 | 2022-01-25 | 天津力神电池股份有限公司 | Method for determining lithium battery quick-charging strategy |
| CN113991195A (en) * | 2020-05-19 | 2022-01-28 | 杭州铅锂智行科技有限公司 | Charger and charging method thereof |
| WO2023092301A1 (en) * | 2021-11-23 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Secondary battery charging method and apparatus, and computer storage medium and electronic device |
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