CN112087025A - Charging method and charger - Google Patents
Charging method and charger Download PDFInfo
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- CN112087025A CN112087025A CN202010856637.6A CN202010856637A CN112087025A CN 112087025 A CN112087025 A CN 112087025A CN 202010856637 A CN202010856637 A CN 202010856637A CN 112087025 A CN112087025 A CN 112087025A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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- H—ELECTRICITY
- 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
-
- 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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a battery charging method, which comprises the following steps: step 1: fast charging, wherein the charging current is between 0.8 and 2.0 ℃; step 2: slowly charging; and step 3: trickle charging. The invention also provides a charger. The charging method and the charger can realize quick charging and ensure the charging effect of the battery.
Description
Technical Field
The invention relates to the field of storage batteries.
Background
With the rise of the take-out industry, the electric moped is taken as a mainstream transport tool, and the user has more and more requirements on the cruising ability and the quick charging of the storage battery. However, the capacity of the battery pack is limited, and a group of batteries with 100% charge state can only be maintained for about 2h under continuous discharge, so that a fast charging method is particularly important.
Most users can choose to prepare multiunit battery reserve at present, just in time change when the vehicle using motor battery electric quantity is not enough, but this kind of method can increase use cost on the one hand, and on the other hand can appear riding the condition that the battery electric quantity used up on the way. At this time, if there is no fast charging pile nearby, the charging will be very slow by using a daily charger. At present, a charging technology capable of charging 80-90% in a short time, such as within 1 hour, and a charging technology capable of charging to 100% in a gap time between the early peak period, the middle peak period and the late peak period are lacked.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a method for charging a battery, comprising the following steps: step 1: fast charging, wherein the charging current is between 0.8 and 2.0 ℃; step 2: slowly charging; and step 3: trickle charging.
Further, the step 1 is rapid time-limited charging, and the time is limited by jumping after charging to 2.35V/cell-2.67V/cell or by timing circuit.
Further, step 2 is slow time-limited charging; and step 3 is trickle time-limited charging.
Further, the sum of the charging time in step 2 and step 3 is less than 2 hours.
Further, the charging current in the step 2 is between 0.25 and 0.5C; the constant voltage is 2.45V/cell to 2.55V/cell, and the charging current in the step 3 is between 0.015 and 0.03C.
The invention also protects a charger.
The charging method and the charger can realize quick charging and ensure the charging effect of the battery.
Drawings
Fig. 1 is a block circuit diagram of the charger of the present invention.
Detailed Description
The invention is further described with reference to specific examples.
The charging method of the lead-acid storage battery comprises the following steps: step 1, in an initial quick charging stage, constant-current charging is carried out, the state of charge of the battery is low in the initial quick charging stage, the charging acceptance capacity is high, the charging current is 0.8-2.0C, the charging current is high in the quick charging stage, the time for the voltage of the storage battery to reach the jump potential from the gas potential is short, the gas evolution is relatively small, and the side effect of the jump potential on the storage battery still needs to be considered. And too big charging current can produce adverse effect to the polar plate of battery, the connecting wire between the storage battery group etc. for example lead to battery and connecting wire overheat, cause the connecting wire ageing, the solder joint melts the perforation danger. Therefore, the jump voltage in step 1 needs to be set properly. The condition for step 1 jumping is to set the cell voltage to implement. If the charging is carried out to 2.35V/cell to 2.67V/cell, the step 2 is skipped. The charging time in the step 1 can also be controlled by a timing circuit, and different timing times are preset according to the value of the charging current, so that the step 2 is skipped when the timing time is reached. And 2, in the intermediate slow charging stage, if constant-voltage time-limited charging is carried out, the negative electrode charging is basically finished through the step 1, and the intermediate slow charging stage mainly plays a role of completely charging the positive electrode. At the moment, the battery has poor charging acceptance, and a large amount of gas can be generated by setting too large current or too high voltage, so that the water loss is increased, and the thermal runaway phenomenon of the battery is easy to occur. The parameter settings are therefore as follows: the constant voltage is 2.45V/cell-2.55V/cell, the charging is slowly charged with a small current such as 0.25C-0.5C until the charging current is shifted to 0.01C-0.05C, and the timing circuit starts timing at the same time of the step 2, preferably within 1.5h of the limit, for example, the timing circuit jumps when the time is limited, and the water loss is controlled while slowly supplementing the capacity of the storage battery at the limit, thereby ensuring the service life of the battery and controlling the final time of charging completion. And step 3: and a late trickle phase, such as a small current reinforcement phase. The cells are now substantially in the fully charged phase, mainly serving to balance/reinforce the individual cells and the individual cells. Parameters are as follows: the charging current is 0.015-0.03C, is not limited by voltage, and is preferably limited within 0.5h, such as time limit jumping through a timing circuit. The sulfuration phenomenon of the storage battery caused by lagging of a certain cell can be eliminated by charging without limiting the voltage and the low current, so that each cell achieves the effect of equalizing charging, or the voltage constant voltage charging between 2.35V/cell and 2.55V/cell is adopted, and the time limit is within 1 h. The sum of the time limits in step 2 and step 3 is preferably not more than 2 hours, so that the total charging time for completing charging to a 100% state of charge is controlled to be not more than 3 hours as much as possible.
This verification is based on the fact that the charging test of different currents is only performed on the connecting wire of 4 square millimeters in the step 1, and the test method is as follows:
firstly, selecting 2 6-DZF-20 storage batteries, connecting the storage batteries in series through a 4-square connecting wire, and then connecting the storage batteries with a charging and discharging detection device;
and secondly, in a normal temperature environment, fully charging the storage battery pack according to a full charging method in the national standard GB/T22199.1-2017. Then discharging with 10A current until the terminal voltage of the storage battery pack is 21.0V, and recording discharge capacity Ca；
ThirdlyThe storage battery pack is subjected to constant current charging at the currents of 15A, 20A, 25A, 30A, 35A and 40A respectively, and the charging state is up to 85% C of the storage battery packa；
And fourthly, recording the charging time and the capacity in the charging process, and the voltage, the temperature and the resistance at two ends of the connecting line.
The above tests prove that the specific data are shown in Table 1.
According to the capacity conversion formula T ═ C/I, and test results show that when the charging current is less than 1C (20A), the charging time is higher than 60 min;
when the charging current is greater than 30A, the voltage at the two ends of the connecting line reaches 111mV, and then the voltage drop of the connecting line under the charging current can reach 0.4V for a group of 60V20Ah storage battery packs (4 connecting lines are needed), and the voltage drop is too high to cause the voltage of the storage battery to be lower, so that the charging capacity of the storage battery packs is reduced; in addition, when the charging current is 40A, the temperature rise of the connecting wire reaches more than 30 ℃, and the higher temperature rise easily accelerates the aging of the connecting wire. From the data, the factors of charging time, capacity, voltage drop, temperature rise and the like are considered at the same time, the current is preferably 0.8-2.0C, the early quick charging stage time is within 1h, and the best time is 60-30 minutes.
The following experiments of step 1-step 3 were performed using conventional 6-DZF-20 batteries as experimental samples, charged at different currents (0.8C, 1.0C, 1.2C, 1.5C, 1.7C, 2.0C) in step 1.
Example 1:
step 1: charging with 0.8C current, the voltage reaches 2.5V/cell, the battery capacity is 18.0Ah, the battery charge state reaches 81%, and the charging time is as follows: 67min, skipping to the step 2;
step 2: with the current of 0.5C and the constant voltage of 2.45V/cell, when the charging current is reduced to 0.05C or the time at the stage reaches 1.5h, skipping to the step 3; the battery state of charge reaches 101%.
And step 3: the charging was completed at 0.015C, 0.5 h. The battery state of charge reaches 102%. Total charging time: 3h07 min.
Example 2:
step 1: charging with 1.0C current until the voltage reaches 2.53V/cell, wherein the battery capacity is 18.4Ah, the battery charge state reaches 83%, and the charging time is as follows: 55min, jumping to the step 2;
step 2: with the current of 0.5C and the constant voltage of 2.47V/cell, when the charging current reaches 0.05C or the time of the stage reaches 1.5h, skipping to the step 3; the charge state of the battery reaches 102 percent
And step 3: the charging was completed at 0.015C, 0.5 h. The battery state of charge is up to 103% of the total time charged: 2h55min
Example 3:
step 1: charging with 1.2C current until the voltage reaches 2.58V/cell, wherein the battery capacity is 18.8Ah, the battery charge state reaches 84%, and the charging time is as follows: 47min, jumping to step 2;
step 2: with the current of 0.5C and the constant voltage of 2.49V/cell, when the charging current reaches 0.05C or the time of the stage reaches 1.5h, skipping to the step 3; the charge state of the battery reaches 104 percent
And step 3: the charging was completed at 0.015C, 0.5 h. The battery state of charge is up to 105% of the total time charged: 2h47min
Example 4:
step 1: charging with 1.5C current until the voltage reaches 2.62V/cell, wherein the battery capacity is 19.0Ah, the battery charge state reaches 85%, and the charging time is as follows: 38min, jumping to the step 2;
step 2: with the current of 0.5C and the constant voltage of 2.51V/cell, when the charging current reaches 0.05C or the time of the stage reaches 1.5h, skipping to the step 3; the charge state of the battery reaches 105%
And step 3: the charging was completed at 0.015C, 0.5 h. Battery state of charge is up to 106% total time charged: 2h38min
Example 5:
step 1: charging with 1.7C current until the voltage reaches 2.67V/cell, wherein the battery capacity is 19.2Ah, the battery charge state reaches 86%, and the charging time is as follows: 33min, jumping to the step 2;
step 2: with the current of 0.5C and the constant voltage of 2.53V/cell, when the charging current reaches 0.05C or the time of the stage reaches 1.5h, skipping to the step 3; the charge state of the battery reaches 106 percent
And step 3: the charging was completed at 0.015C, 0.5 h. The battery state of charge is up to 107% of the total time charged: 2h33min
Example 6:
step 1: charging with 2.0C current until the voltage reaches 2.7V/cell, wherein the battery capacity is 19.5Ah, the battery charge state reaches 88%, and the charging time is as follows: 29min, skipping to the step 2;
step 2: with the current of 0.5C and the constant voltage of 2.55V/cell, when the charging current reaches 0.05C or the time of the stage reaches 1.5h, skipping to the step 3; the charge state of the battery reaches 108 percent
And step 3: the charging was completed at 0.015C, 0.5 h. The battery state of charge is up to 109% of the total time charged: 2h29min
It can be seen from the above embodiment that in step 1, as the charging current increases, the charging time to reach the desired battery charge state is shorter. The charging system of the invention can flexibly match the requirements of users on the charging time on one hand, and on the other hand, the charging effect is ensured on the premise of meeting the charging time of quick charging.
The invention also provides a charger of the lead-acid storage battery 6, which comprises a switch circuit 1, a charging circuit 2, a voltage detection circuit 3, a timing circuit 4 and a controller 5. The switching circuit 1 is used for completing alternating current-direct current conversion of commercial power, providing working power supplies of other circuit modules in the charger and providing charging current or charging voltage; the charging circuit 2 is used for receiving a charging current or charging voltage signal provided by the switch circuit 1 and providing the charging current or charging voltage signal to the storage battery 6, and the charging circuit 2 comprises a quick charging circuit, a slow charging circuit and a trickle charging circuit; the voltage and current detection circuit 3 detects battery parameters and sends detection results to the controller 5; the controller 5 controls the charging circuit 2 to enter a corresponding charging mode or activates the timing circuit 4 to control the charging circuit 2 to enter a corresponding charging mode when the result detected by the voltage and current detection circuit 3 meets the condition.
When the battery starts to charge, the commercial power is converted into a controllable charging voltage or charging current signal through AC-DC (alternating current-direct current), the controller controls the charging circuit to enter a first stage, namely a rapid charging stage, for example, constant current charging with a larger current I1, wherein the current I1 is preferably between 0.8C and 2.0C, and also can be constant voltage or constant power rapid charging. The controller opens the voltage detection circuit to detect the battery voltage, and if the detected voltage value reaches the battery cell voltage and preferably reaches 2.35V/cell to 2.67V/cell, the controller controls the switch circuit and enables the charging circuit to enter the second stage according to the input signal of the voltage detection circuit; the time can be controlled by a timing circuit to enter the second stage; and in the second stage, charging is carried out at a low current such as 0.5C, the timing circuit is activated and the charging circuit is controlled to carry out time-limited charging when the charging circuit enters the second stage, the time limit is preferably within 1.5 hours, the constant cell voltage for charging is preferably within 2.45V/cell to 2.55V/cell, when the preset time of the timing circuit is reached or the current reaches a set value, the charging circuit is controlled by the controller to enter the third stage, namely the trickle stage, the constant-current charging is preferably carried out at a current between 0.015C and 0.03C or the constant-voltage charging is carried out at a voltage between 2.35V/cell and 2.55V/cell for a period of time, the time can be controlled by the timing circuit, and the time limit is preferably within 0.5 hour until the whole charging process is completed.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (10)
1. A method of charging a battery comprising the steps of: step 1: fast charging, wherein the charging current is between 0.8 and 2.0 ℃; step 2: slowly charging; and step 3: trickle charging.
2. The battery charging method according to claim 1, wherein the step 1 is a fast time-limited charging, and the time is limited by charging to 2.35V/cell to 2.67V/cell and then jumping to the time limit or by a timing circuit.
3. The method according to claim 2, wherein the step 2 is slow time-limited charging; and step 3 is trickle time-limited charging.
4. A method of charging a battery as claimed in claim 3, wherein the sum of the charging times in step 2 and step 3 is less than 2 hours.
5. The method according to claim 3, wherein the charging current in step 2 is between 0.25C and 0.5C; the constant voltage is 2.45V/cell to 2.55V/cell, and the charging current in the step 3 is between 0.015 and 0.03C.
6. A method of charging a battery, comprising the steps of 1: fast charging, wherein the charging current is between 0.8 and 2.0 ℃; and jumping after charging to 2.35V/cell-2.67V/cell. Step 2: slowly charging, wherein the charging current is between 0.25 and 0.5 ℃; constant pressure is 2.45V/cell to 2.55V/cell; the skipping condition is that the charging current is about 0.01C-0.05C, or skipping is carried out after the charging time reaches 1.5h at the stage. And step 3: trickle charging, wherein the charging current is between 0.015 and 0.03C; and finishing charging after charging for 0.5 h.
7. A charger comprises a charging circuit, a controller and a voltage detection circuit, wherein the charging circuit and the voltage detection circuit are electrically connected with the controller, the charging circuit comprises a quick charging circuit, a slow charging circuit and a trickle charging circuit, and the charger is characterized in that the quick charging circuit is a time-limited quick charging circuit.
8. The charger of claim 7, wherein the controller controls the charging time of the time-limited fast charge circuit by a detected voltage of the voltage detection circuit.
9. The charger of claim 7, further comprising a timing circuit, wherein the controller controls the charging time of the time-limited fast charge circuit via the timing circuit.
10. A charger according to any one of claims 7-9, wherein said controller controls the charging time of said slow charging circuit and the charging time of said trickle charging circuit via said timing circuit.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250906.8A CN111342156A (en) | 2019-12-09 | 2019-12-09 | Charging method of storage battery |
| CN2019112509068 | 2019-12-09 | ||
| CN202010425130 | 2020-05-19 | ||
| CN2020104251305 | 2020-05-19 | ||
| PCT/CN2020/104883 WO2021114683A1 (en) | 2019-12-09 | 2020-07-27 | Charger and charging method therefor |
| CNPCT/CN2020/104883 | 2020-07-27 |
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| CN112087025A true CN112087025A (en) | 2020-12-15 |
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| CN202010767493.7A Pending CN112087019A (en) | 2019-12-09 | 2020-08-03 | Charger and charging method thereof |
| CN202010766954.9A Pending CN112087018A (en) | 2019-12-09 | 2020-08-03 | Charger and charging method thereof |
| CN202021580001.5U Active CN212462861U (en) | 2019-12-09 | 2020-08-03 | A charger |
| CN202010856637.6A Pending CN112087025A (en) | 2019-12-09 | 2020-08-24 | Charging method and charger |
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| CN202010766954.9A Pending CN112087018A (en) | 2019-12-09 | 2020-08-03 | Charger and charging method thereof |
| CN202021580001.5U Active CN212462861U (en) | 2019-12-09 | 2020-08-03 | A charger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113381491A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113381490A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112968226A (en) * | 2021-02-04 | 2021-06-15 | 河南克能新能源科技有限公司 | Capacity restoration method for laggard single-cell battery pack |
| CN115765113A (en) * | 2022-12-15 | 2023-03-07 | 铅锂智行(北京)科技有限公司 | Charger and charging method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100401575C (en) * | 2003-03-08 | 2008-07-09 | 中兴通讯股份有限公司 | Cell charging controller and charging method for UPS |
| CN102136613B (en) * | 2011-02-18 | 2013-06-19 | 江苏理工学院 | Valve-regulated lead-acid battery equalizing charge method |
| CN202513639U (en) * | 2012-04-28 | 2012-10-31 | 深圳市瑞必达科技有限公司 | Charging circuit and three-phase battery charger |
| CN104682459A (en) * | 2013-11-29 | 2015-06-03 | 北京力源兴达科技有限公司 | Charging circuit based on constant current-constant voltage-floating charging method of lead acid storage battery |
| CN204118833U (en) * | 2014-10-17 | 2015-01-21 | 广州市江科电子有限公司 | A kind of electric vehicle lithium battery charger |
| CN104600386B (en) * | 2015-01-29 | 2017-01-25 | 张继红 | Pulse energy-saving charging method and pulse energy-saving charger |
| CN107666167A (en) * | 2017-11-21 | 2018-02-06 | 深圳市森树强电子科技有限公司 | A kind of novel three-stage charging management method and device |
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2020
- 2020-08-03 CN CN202010767493.7A patent/CN112087019A/en active Pending
- 2020-08-03 CN CN202010766954.9A patent/CN112087018A/en active Pending
- 2020-08-03 CN CN202021580001.5U patent/CN212462861U/en active Active
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381491A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113381490A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
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| CN112087019A (en) | 2020-12-15 |
| CN112087018A (en) | 2020-12-15 |
| CN212462861U (en) | 2021-02-02 |
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