CN112072196A - Quick charging method and device for lithium ion battery - Google Patents
Quick charging method and device for lithium ion battery Download PDFInfo
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- CN112072196A CN112072196A CN202010951089.5A CN202010951089A CN112072196A CN 112072196 A CN112072196 A CN 112072196A CN 202010951089 A CN202010951089 A CN 202010951089A CN 112072196 A CN112072196 A CN 112072196A
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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
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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
- H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
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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
- 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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Abstract
The invention provides a method and a device for rapidly charging a lithium ion battery, wherein the method comprises the following steps: acquiring voltage information and current information detected by a detection circuit in real time; determining a first voltage preset threshold, a second voltage preset threshold and a first current preset threshold; processing the voltage information with a first voltage preset threshold and a second voltage preset threshold respectively to obtain constant current control information, and processing the current information with the first current preset threshold to obtain constant voltage control information; and charging according to the constant current control information and the constant voltage control information. According to the invention, the lithium ion battery is charged through the constant voltage control and the constant current control by detecting the voltage information and the current information of the lithium ion battery in real time, so that the service life of the lithium ion battery is prolonged, and the safety and the charging speed of the battery are improved.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a method and a device for rapidly charging a lithium ion battery.
Background
The lithium ion battery is a secondary battery, mainly composed of two electrodes, an electrolyte and a porous separator, and works by moving lithium ions between a positive electrode and a negative electrode, and in the process of charging and discharging, Li + (lithium ions) are inserted and extracted back and forth between the two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Compared with power batteries such as lead-acid batteries, hydrogen-nickel batteries, cadmium-nickel batteries and the like, lithium ion batteries have many advantages, such as high specific energy, high open circuit voltage, small self-discharge point, no memory effect and the like, are widely applied to products such as mobile phones, notebook computers, new energy vehicles and the like, and the performance and the service life of the lithium ion batteries are closely related to a charging method, so that the quick charging of the lithium ion batteries becomes a technical problem to be solved at present in order to improve the cycle life and the safety performance of the batteries.
Disclosure of Invention
The invention provides a method and a device for rapidly charging a lithium ion battery.
In a first aspect, the present invention provides a method for rapidly charging a lithium ion battery, including:
acquiring voltage information and current information detected by a detection circuit in real time;
determining a first voltage preset threshold, a second voltage preset threshold and a first current preset threshold;
processing the voltage information with a first voltage preset threshold and a second voltage preset threshold respectively to obtain constant current control information, and processing the current information with the first current preset threshold to obtain constant voltage control information;
and charging according to the constant current control information and the constant voltage control information.
Optionally, according to the voltage information and the first voltage preset threshold and the second voltage preset threshold, obtaining constant current control information based on a control algorithm of voltage feedback;
and acquiring constant voltage control information based on a control algorithm of current feedback according to the current information and the first current preset threshold.
Optionally, the control algorithm comprises a PID control algorithm.
Optionally, the voltage information is respectively compared with a first preset voltage threshold and a second preset voltage threshold, if the voltage information is not higher than the first preset voltage threshold, the second preset current threshold is adopted for constant current pulse charging, and if the voltage information is higher than the first preset voltage threshold and not higher than the second preset voltage threshold, the third preset current threshold is adopted for constant current pulse charging;
and comparing the current information with a first current preset threshold, if the current information is not lower than the first current preset threshold, adopting a second voltage preset threshold to perform constant voltage pulse charging, and if the current information is lower than the first current preset threshold, zeroing the constant voltage pulse.
Optionally, the duty ratio of the constant current pulse is adjusted according to the voltage information, the first voltage preset threshold and the second voltage preset threshold; and adjusting the duty ratio of the constant voltage pulse according to the current information and the preset threshold value of the first current.
Optionally, temperature information detected by the detection circuit in real time is acquired; and comparing the temperature information with a preset temperature threshold, and stopping charging if the temperature information is higher than the preset temperature threshold.
Optionally, determining a time preset threshold; and detecting the charging time, and stopping charging if the charging time exceeds a preset time threshold.
Optionally, acquiring a pulse frequency according to the constant current pulse and the constant voltage pulse; and detecting the voltage information, the current information and the temperature information in real time by the detection current according to the pulse frequency.
Optionally, controlling on/off of the controllable switch; when the controllable switch is switched on, charging is carried out; and when the controllable switch is switched off, the charging is stopped.
Optionally, wired/wireless charging is performed according to the constant current control information and the constant voltage control information.
Optionally, calculating the battery capacity according to the current information and the charging time; and displaying the electric quantity of the battery in real time, and remotely transmitting the electric quantity of the battery to the terminal.
Optionally, the battery power and the power preset threshold are compared, and if the battery power is higher than the power preset threshold, the alarm information is remotely transmitted to the terminal.
In another aspect, the present invention provides a lithium ion battery rapid charging device, including:
the acquisition module is used for acquiring voltage information and current information detected by the detection circuit in real time;
the determining module is used for determining a first voltage preset threshold, a second voltage preset threshold and a first current preset threshold;
the processing module is used for processing the voltage information with a first preset voltage threshold and a second preset voltage threshold respectively to obtain constant current control information, and processing the current information with the first preset current threshold to obtain constant voltage control information;
and the charging module is used for charging the lithium ion battery according to the constant current control information and the constant voltage control information.
According to the technical scheme, the voltage information and the current information detected by the detection circuit in real time are acquired; determining a first voltage preset threshold, a second voltage preset threshold and a first current preset threshold; processing the voltage information with a first voltage preset threshold and a second voltage preset threshold respectively to obtain constant current control information, and processing the current information with the first current preset threshold to obtain constant voltage control information; and charging according to the constant current control information and the constant voltage control information. According to the invention, the charging voltage and the charging current of the lithium ion battery are detected in real time, and the constant current control information and the constant voltage control information are determined by combining the preset threshold value, so that the cycle life and the safety performance of the battery are improved, and the lithium ion battery is rapidly charged.
Drawings
Fig. 1 is a schematic flow chart of a method for rapidly charging a lithium ion battery according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a fast charging process of a lithium ion battery according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a fast charging process of a lithium ion battery according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a lithium ion battery quick charging device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are 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 of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a schematic flow chart of a lithium ion battery quick charging method according to an embodiment of the present invention, and as shown in fig. 1, the lithium ion battery quick charging method according to this embodiment is as follows.
101. Acquiring voltage information and current information detected by a detection circuit in real time;
102. determining a first voltage preset threshold, a second voltage preset threshold and a first current preset threshold;
103. processing the voltage information with a first voltage preset threshold and a second voltage preset threshold respectively to obtain constant current control information, and processing the current information with the first current preset threshold to obtain constant voltage control information;
104. and charging according to the constant current control information and the constant voltage control information.
In a particular embodiment, step 101 may include: the detection circuit detects the voltage information and the current information of the lithium ion battery in real time, the voltage information is the terminal voltage information of the lithium ion battery, the current information is the charging current information, the acquisition frequency can include one second, and the acquisition frequency is preferably that the voltage information and the current information of the lithium ion battery are acquired by adopting Pulse Width Modulation (PWM).
In particular embodiments, step 102 may include: the charging of the lithium ion battery can be divided into three stages, wherein the first stage is trickle current charging, so that the terminal voltage is ensured not to be higher than the rated voltage, the charging current is very small, and the lithium ion battery has a certain protection effect on the battery; the second stage is large current charging, which ensures that the terminal voltage is not higher than the termination charging voltage, and the battery can be charged rapidly, and the charging capacity can reach about 85 percent of the battery capacity; the third stage is constant voltage charging, and the charging is finished when the charging current is reduced to 0.01C, so as to ensure that the battery reaches full charge, wherein C is a charging rate and represents the charging speed of the battery, and if the problem of loss of the battery during charging is not considered, the charging rate C is shown as the formula (1):
where I is a charging current, in mA or a, Q is a battery capacity, in mAh or Ah, and the charge amount C represents a current level of the lithium ion battery during charging and discharging, for example, when a rated capacity of the charging battery is 1000mAh, a charging rate is 1C when the charging current is 1000mA, and a charging rate is 2C when the charging current is 2000 mA.
The working voltage of the lithium ion battery has a certain relationship with the material used by the battery, the rated voltage of common anode materials, namely lithium cobaltate and lithium manganate, is about 3.7V, and the rated voltage of lithium iron phosphate is about 3.2V, for example, when the lithium iron phosphate is used as the anode material of the lithium ion battery and carbon is used as the cathode material of the battery, the first preset voltage threshold is set to be 3.2V. Based on the requirements of materials and use safety, the potential difference between the anode and the cathode of the lithium ion battery cannot exceed 4.2V, and the second voltage preset threshold is set to be 4.2V. In the third charging stage, the lithium ion battery is charged by adopting a constant voltage, the charging current is slowly reduced, and when the charging current is reduced to 0.01C, the charging is finished, for example, the first current preset threshold is set to be 10mA for the lithium ion battery with the rated capacity of 1000 mAh.
In particular embodiments, step 103 may include: acquiring constant current control information based on a control algorithm of voltage feedback according to the voltage information, a first voltage preset threshold and a second voltage preset threshold; and acquiring constant voltage control information based on a control algorithm of current feedback according to the current information and the first current preset threshold, wherein the control algorithm can comprise a PID (proportional-integral-derivative) control algorithm.
In particular embodiments, step 104 may include: and carrying out constant-current charging on the lithium ion battery according to the constant-current control information, and carrying out constant-voltage charging on the lithium ion battery according to the constant-voltage control information. The charging mode may include wired/wireless charging, and the low-power wireless charging mode usually adopts an electromagnetic induction mode, such as Qi mode for charging a mobile phone.
Fig. 2 shows a schematic diagram of a fast charging process of a lithium ion battery according to an embodiment of the present invention, as shown in fig. 2, for example, a first preset voltage threshold is set to be 3.2V, a second preset voltage threshold is set to be 4.2V, a first preset current threshold is set to be 10mA, and a first charging stage may include: calculating the fed-back voltage information and a first preset voltage threshold value to form constant current control information, and controlling a charging circuit to charge the lithium ion battery according to the constant current control information, so that the voltage of the lithium ion battery is controlled to reach and keep the first preset voltage threshold value at 3.2V, and the charging time is T1; the second stage of charging may include: calculating the fed-back voltage information and a second preset voltage threshold to form constant current control information, and controlling a charging circuit to charge the lithium ion battery according to the constant current control information, so that the voltage of the lithium ion battery is controlled to reach and keep the second preset voltage threshold of 4.2V, and the charging time is T2; the third charging phase may include: and calculating the feedback current information and a first current preset threshold to form constant voltage control information, controlling a charging circuit to charge the lithium ion battery according to the constant voltage control information, and stopping charging the lithium ion battery until the feedback current information is reduced to 10mA of the first current preset threshold.
Fig. 3 is a schematic diagram illustrating a fast charging process of a lithium ion battery according to an embodiment of the present invention, and as shown in fig. 3, a first charging stage may include: comparing the fed back voltage information with a first preset voltage threshold, and if the fed back voltage information is not higher than the first preset voltage threshold, for example, 3.2V, performing constant current pulse charging on the lithium ion battery by adopting a second preset current threshold, wherein the second preset current threshold can be 0.07C charging current, for example, 70mA constant current pulse for pre-charging the lithium ion battery; the second stage of charging may include: comparing the fed back voltage information with a second preset voltage threshold, and if the fed back voltage information is higher than the first preset voltage threshold and not higher than the second preset voltage threshold, for example, 4.2V, performing constant current pulse charging on the lithium ion battery by adopting a third preset current threshold, wherein the third preset current threshold can be set to be between 0.5 and 0.8C, and preferably is 0.7C, and the charging time and the charging safety are well balanced by the charging current of 0.7C; the third charging phase may include: comparing the fed back current information with a first current preset threshold, if the fed back current information is not lower than the first current preset threshold, for example 10mA, adopting a second voltage preset threshold, for example 4.2V, to perform constant voltage pulse charging on the lithium ion battery, and when the fed back current information is lower than the first current preset threshold, for example 10mA, returning the constant voltage pulse to zero, stopping charging the lithium ion battery, wherein the constant voltage pulse can preferably be PWM (pulse width modulation) wave, most of oxygen generated in the pulse charging process is reduced into electrolyte under the discharge pulse, so that the gas evolution amount can be greatly reduced. The concentration polarization and the ohmic polarization can be eliminated naturally by reducing the air evolution quantity, so that the internal pressure of the lithium ion battery is reduced, the pulse constant current charging at the next stage is carried out more smoothly, the lithium ion battery can absorb more electric quantity, and the service life and the safety performance of the lithium ion battery are prolonged.
In a specific embodiment, the constant current pulse is adjusted according to the feedback voltage information and the first voltage preset threshold, for example, the duty ratio of a PWM wave, for example, the charging time T1 for pre-charging lithium ions to a voltage of 3.2V at the lithium ion terminal with a PWM wave of 70mA is 40 minutes, the duty ratio of the PWM wave is 50%, and if T1 is adjusted to 30 minutes, the PWM duty ratio can be adjusted to 67%. And adjusting the duty ratio of the constant-current PWM wave according to the feedback voltage information and the preset threshold value of the second voltage, for example, rapidly charging lithium ions by adopting a PWM wave of 700mA, wherein the charging time T2 to the voltage of the lithium ion terminal of 4.2V is 80 minutes, the duty ratio of the PWM wave is 50%, and if the T2 is adjusted to 50 minutes, the PWM duty ratio can be adjusted to 80%. And adjusting the duty ratio of the constant-current PWM wave according to the feedback current information and the preset threshold value of the first current, wherein for example, the charging time T3 for charging lithium ions to be charged with lithium ion charging current of 10mA at constant voltage by adopting a PWM wave of 4.2V is 40 minutes, the duty ratio of the PWM wave is 50 percent, and if the T2 is adjusted to 30 minutes, the PWM duty ratio can be adjusted to 67 percent.
In a specific embodiment, the lithium ion battery normally works within a temperature range of-20 ℃ to +60 ℃, temperature information detected by the detection circuit in real time is obtained, the temperature information may be acquired by using a temperature sensor to acquire an internal temperature of the lithium ion, the fed back temperature information is compared with a preset temperature threshold, for example, the preset temperature threshold is preferably 65 ℃, and if the fed back temperature information is higher than the preset temperature threshold, the lithium ion battery is stopped being charged.
In an embodiment, in the case that the voltage information and the temperature information are not accurately detected, the lithium ion battery is prevented from being overcharged, a time preset threshold of the battery may be set, the charging time is detected, for example, the time preset threshold is set to 3 hours, and if the charging time exceeds 3 hours, the charging of the lithium ion battery is stopped.
In a specific embodiment, the constant current pulse frequency is obtained from the constant current pulse, the constant voltage pulse frequency is obtained from the constant voltage pulse, the detection circuit detects voltage information and temperature information at the time of constant current charging from the constant current pulse frequency, detects current information and temperature information at the time of constant voltage charging from the constant voltage pulse frequency, and the detection frequency of the detection circuit is synchronized with the pulse charging frequency.
In a specific embodiment, the controllable switch is controlled to be turned on/off, the controllable switch is turned on, the charging circuit charges the lithium ion battery, the controllable switch is turned off, and the charging circuit stops charging the lithium ion battery, for example, when the feedback temperature is higher than a preset temperature threshold and/or the charging time exceeds a preset time threshold, the controllable switch is controlled to be turned off, and the lithium ion battery is stopped being charged.
In a specific embodiment, the electric quantity of the lithium ion battery is calculated according to the current information and the charging time of the lithium ion detected by the detection circuit in real time, and the battery electric quantity calculation formula is shown as a formula (2):
Q＝I×t (2)
wherein, Q represents the battery power, the unit is C (coulomb), I represents the current information, the unit is a (ampere), t represents the charging time, the unit is h (hour), the lithium ion battery power is displayed in real time, and the power is remotely transmitted to the terminal, the remote transmission includes wireless remote transmission, for example, 5G (55 th-Generation, fifth Generation mobile communication technology) is adopted to transmit the lithium ion battery power to the smart watch, and the smart watch can display the charging power in real time.
In a specific embodiment, the lithium ion battery electric quantity and an electric quantity preset threshold are compared, the electric quantity preset threshold includes, for example, 100% of rated capacity, if the battery electric quantity is higher than 100% of the rated capacity, the battery overcharge is proved, alarm information is remotely transmitted, for example, a 5G technology is adopted, and the alarm information is transmitted to a mobile terminal, for example, a smart watch, so that the battery charging electric quantity can be monitored in real time, and the battery overcharge is prevented.
Fig. 4 is a schematic structural diagram illustrating a lithium ion battery rapid charging apparatus 4 according to an embodiment of the present invention, and as shown in fig. 4, the lithium ion battery rapid charging apparatus 4 according to the embodiment includes: an acquisition module 41, a determination module 42, a processing module 43 and a processing module 44.
An obtaining module 41, configured to obtain voltage information and current information detected by the detection circuit in real time;
a determining module 42, configured to determine a first preset voltage threshold, a second preset voltage threshold, and a first preset current threshold;
the processing module 43 is configured to process the voltage information with a first preset voltage threshold and a second preset voltage threshold respectively to obtain constant current control information, and process the current information with the first preset current threshold to obtain constant voltage control information;
and the processing module 44 is used for charging the lithium ion battery according to the constant current control information and the constant voltage control information.
Because the device is based on the charging method, the working principle of the device is the same as that of the charging method, and the details are not repeated.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Those of ordinary skill in the art will understand that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present invention as defined in the appended claims.
Claims (10)
1. A method for rapidly charging a lithium ion battery is characterized by comprising the following steps:
acquiring voltage information and current information detected by a detection circuit in real time;
determining a first voltage preset threshold, a second voltage preset threshold and a first current preset threshold;
processing the voltage information with the first preset voltage threshold and the second preset voltage threshold respectively to obtain constant current control information, and processing the current information with the first preset current threshold to obtain constant voltage control information;
and charging according to the constant current control information and the constant voltage control information.
2. The charging method according to claim 1, wherein the processing the voltage information with the first preset voltage threshold and the second preset voltage threshold, respectively, to obtain constant current control information, and the processing the current information with the first preset current threshold, to obtain constant voltage control information, comprises:
acquiring the constant current control information according to the voltage information, the first voltage preset threshold and the second voltage preset threshold based on a control algorithm of voltage feedback;
and acquiring the constant voltage control information based on a control algorithm of current feedback according to the current information and the first current preset threshold.
3. The charging method of claim 2, wherein the control algorithm comprises a PID control algorithm.
4. The charging method according to claim 1, wherein the processing the voltage information with the first preset voltage threshold and the second preset voltage threshold, respectively, to obtain constant current control information, the processing the current information with the first preset current threshold, to obtain constant voltage control information, and the charging according to the constant current control information and the constant voltage control information comprises:
comparing the voltage information with a first voltage preset threshold and a second voltage preset threshold respectively, if the voltage information is not higher than the first voltage preset voltage threshold, adopting a second current preset threshold to perform constant current pulse charging, and if the voltage information is higher than the first voltage preset threshold and is not higher than the second voltage preset threshold, adopting a third current preset threshold to perform constant current pulse charging;
and comparing the current information with a first current preset threshold, if the current information is not lower than the first current preset threshold, adopting a second voltage preset threshold to perform constant voltage pulse charging, and if the current information is lower than the first current preset threshold, returning the constant voltage pulse to zero.
5. The charging method according to claim 4, further comprising:
adjusting the duty ratio of the constant current pulse according to the voltage information, the first voltage preset threshold and the second voltage preset threshold;
and adjusting the duty ratio of the constant voltage pulse according to the current information and the first current preset threshold value.
6. The charging method according to claim 1, further comprising:
acquiring temperature information detected by the detection circuit in real time;
and comparing the temperature information with a preset temperature threshold, and stopping charging if the temperature information is higher than the preset temperature threshold.
7. The charging method according to claim 1, further comprising:
acquiring a time preset threshold;
and detecting the charging time, and stopping charging if the charging time exceeds the time preset threshold.
8. The charging method according to claim 6, further comprising:
acquiring pulse frequency according to the constant current pulse and the constant voltage pulse;
and the detection current detects the voltage information, the current information and the temperature information in real time according to the pulse frequency.
9. The charging method according to any one of claims 6 or 7, further comprising:
controlling on/off of the controllable switch;
when the controllable switch is switched on, charging is carried out;
and when the controllable switch is switched off, the charging is stopped.
10. A lithium ion battery quick charge device, comprising:
the acquisition module is used for acquiring voltage information and current information detected by the detection circuit in real time;
the determining module is used for determining a first voltage preset threshold, a second voltage preset threshold and a first current preset threshold;
the processing module is used for processing the voltage information with the first preset voltage threshold and the second preset voltage threshold respectively to obtain constant current control information, and processing the current information with the first preset current threshold to obtain constant voltage control information;
and the charging module is used for charging the lithium ion battery according to the constant current control information and the constant voltage control information.
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| CN114123431A (en) * | 2021-12-23 | 2022-03-01 | 上海派智能源有限公司 | Battery charging control circuit |
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